This series adds support for the StarFive JH7100 RISC-V SoC. The SoC has
many devices that need non-coherent dma operations to work which isn't
upstream yet[1], so this just adds basic support to boot up, get a
serial console, blink an LED and reboot itself. Unlike the Allwinner D1
this chip doesn't use any extra pagetable bits, but instead the DDR RAM
appears twice in the memory map, with and without the cache.
The JH7100 is a test chip for the upcoming JH7110 and about 300 BeagleV
Starlight Beta boards were sent out with them as part of a now cancelled
BeagleBoard.org project. However StarFive has produced more of the
JH7100s and more boards will be available[2] to buy. I've seen pictures
of the new boards now, so hopefully before the end of the year.
This series is also available at
https://github.com/esmil/linux/commits/starlight-minimal
..but a more complete kernel including drivers for non-coherent
peripherals based on this series can be found at
https://github.com/starfive-tech/linux/tree/visionfive
[1]: https://lore.kernel.org/linux-riscv/[email protected]/
[2]: https://www.linkedin.com/pulse/starfive-release-open-source-single-board-platform-q3-2021-starfive/
/Emil
Changes since v3:
- The reset driver now uses 64bit read/write on the registers so we can
use the regular bitmap macros. Requested by Andy.
- The pinctrl driver no longer resets the GPIO irq handler to
handle_bad_irq on errors, uses reverse xmas tree order where possible
and other nits by Andy.
Changes since v2:
- Ahmad and Geert agreed to switch the license of the clock and reset dt
headers to GPL-2.0 OR MIT, so that both headers and device tree files
can all use the same license.
Bindings are still GPL-2.0-only OR BSD-2-Clause as recommended.
- Clock and reset drivers now set .suppress_bind_attrs = true and use
builtin_platform_driver_probe to make sure the probe function is only
called at init time so we can use __init and __initconst.
- The clock driver now uses devm_clk_hw_register and .parent_data when
registering clocks. This way we can use the dt clock indexes rather
than strings for parent lists and decrease the amount of static data
needed considerably.
- Various dt binding cleanups from Rob
- Reworked description in the pinctrl dt binding.
- Pinctrl driver now depends on CONFIG_OF again since it uses
pinconf_generic_parse_dt_config which is otherwise not defined.
- Pinctrl no longer devm_kfree's data that won't be referenced
if dt pinconf parsing fails before registering groups and function,
and other nits by Andy.
- The dw8250 quirk no longer needs a skip_clk_set_rate bit, but sets
port->set_termios to the function called after clk_set_rate.
Changes since v1:
- Let SOC_STARFIVE select RESET_CONTROLLER but drop SERIAL_8250_DW
- Add missing Signed-of-by to clock dt-binding header
- Use builtin_platform_driver macro for the clock driver, add explicit
comment to the determine_rate callback and other small nits from Andy
- Use reset-controller for node names in documentation and device tree
- Use readl_poll_timeout in reset driver to avoid hanging forever if a
driver leaves the associated clock gated and sort Kconfig and Makefile
entries properly.
- In the pinctrl driver align register names with documentation, remove
invalid __init tag from probe function, use of_property_* functions to
parse device tree, hoist pinmux unpacking into helper function to
better document what's going on, bail on invalid signal group in
device tree and fix many other nits from Andy.
- Refactor and rebase 8250_dw quirk on tty-next
Emil Renner Berthing (12):
RISC-V: Add StarFive SoC Kconfig option
dt-bindings: timer: Add StarFive JH7100 clint
dt-bindings: interrupt-controller: Add StarFive JH7100 plic
dt-bindings: reset: Add Starfive JH7100 reset bindings
reset: starfive-jh7100: Add StarFive JH7100 reset driver
dt-bindings: pinctrl: Add StarFive pinctrl definitions
dt-bindings: pinctrl: Add StarFive JH7100 bindings
pinctrl: starfive: Add pinctrl driver for StarFive SoCs
dt-bindings: serial: snps-dw-apb-uart: Add JH7100 uarts
serial: 8250_dw: Add StarFive JH7100 quirk
RISC-V: Add initial StarFive JH7100 device tree
RISC-V: Add BeagleV Starlight Beta device tree
Geert Uytterhoeven (4):
dt-bindings: clock: starfive: Add JH7100 clock definitions
dt-bindings: clock: starfive: Add JH7100 bindings
clk: starfive: Add JH7100 clock generator driver
dt-bindings: reset: Add StarFive JH7100 reset definitions
.../clock/starfive,jh7100-clkgen.yaml | 56 +
.../sifive,plic-1.0.0.yaml | 1 +
.../pinctrl/starfive,jh7100-pinctrl.yaml | 307 ++++
.../bindings/reset/starfive,jh7100-reset.yaml | 38 +
.../bindings/serial/snps-dw-apb-uart.yaml | 5 +
.../bindings/timer/sifive,clint.yaml | 1 +
MAINTAINERS | 22 +
arch/riscv/Kconfig.socs | 8 +
arch/riscv/boot/dts/Makefile | 1 +
arch/riscv/boot/dts/starfive/Makefile | 2 +
.../dts/starfive/jh7100-beaglev-starlight.dts | 164 ++
arch/riscv/boot/dts/starfive/jh7100.dtsi | 230 +++
drivers/clk/Kconfig | 1 +
drivers/clk/Makefile | 1 +
drivers/clk/starfive/Kconfig | 9 +
drivers/clk/starfive/Makefile | 3 +
drivers/clk/starfive/clk-starfive-jh7100.c | 689 +++++++++
drivers/pinctrl/Kconfig | 17 +
drivers/pinctrl/Makefile | 1 +
drivers/pinctrl/pinctrl-starfive.c | 1354 +++++++++++++++++
drivers/reset/Kconfig | 7 +
drivers/reset/Makefile | 1 +
drivers/reset/reset-starfive-jh7100.c | 176 +++
drivers/tty/serial/8250/8250_dw.c | 3 +
include/dt-bindings/clock/starfive-jh7100.h | 202 +++
.../dt-bindings/pinctrl/pinctrl-starfive.h | 275 ++++
include/dt-bindings/reset/starfive-jh7100.h | 126 ++
27 files changed, 3700 insertions(+)
create mode 100644 Documentation/devicetree/bindings/clock/starfive,jh7100-clkgen.yaml
create mode 100644 Documentation/devicetree/bindings/pinctrl/starfive,jh7100-pinctrl.yaml
create mode 100644 Documentation/devicetree/bindings/reset/starfive,jh7100-reset.yaml
create mode 100644 arch/riscv/boot/dts/starfive/Makefile
create mode 100644 arch/riscv/boot/dts/starfive/jh7100-beaglev-starlight.dts
create mode 100644 arch/riscv/boot/dts/starfive/jh7100.dtsi
create mode 100644 drivers/clk/starfive/Kconfig
create mode 100644 drivers/clk/starfive/Makefile
create mode 100644 drivers/clk/starfive/clk-starfive-jh7100.c
create mode 100644 drivers/pinctrl/pinctrl-starfive.c
create mode 100644 drivers/reset/reset-starfive-jh7100.c
create mode 100644 include/dt-bindings/clock/starfive-jh7100.h
create mode 100644 include/dt-bindings/pinctrl/pinctrl-starfive.h
create mode 100644 include/dt-bindings/reset/starfive-jh7100.h
--
2.33.1
Add compatible string for the StarFive JH7100 clint.
Signed-off-by: Emil Renner Berthing <[email protected]>
Reviewed-by: Geert Uytterhoeven <[email protected]>
Acked-by: Rob Herring <[email protected]>
---
Documentation/devicetree/bindings/timer/sifive,clint.yaml | 1 +
1 file changed, 1 insertion(+)
diff --git a/Documentation/devicetree/bindings/timer/sifive,clint.yaml b/Documentation/devicetree/bindings/timer/sifive,clint.yaml
index a35952f48742..8d5f4687add9 100644
--- a/Documentation/devicetree/bindings/timer/sifive,clint.yaml
+++ b/Documentation/devicetree/bindings/timer/sifive,clint.yaml
@@ -25,6 +25,7 @@ properties:
items:
- enum:
- sifive,fu540-c000-clint
+ - starfive,jh7100-clint
- canaan,k210-clint
- const: sifive,clint0
--
2.33.1
Add StarFive Kconfig option to select SoC specific and common drivers
required for these SoCs. Select subsystems required to boot so the
required drivers gets enabled by default.
Signed-off-by: Emil Renner Berthing <[email protected]>
Reviewed-by: Geert Uytterhoeven <[email protected]>
---
arch/riscv/Kconfig.socs | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/arch/riscv/Kconfig.socs b/arch/riscv/Kconfig.socs
index 30676ebb16eb..6ec44a22278a 100644
--- a/arch/riscv/Kconfig.socs
+++ b/arch/riscv/Kconfig.socs
@@ -19,6 +19,14 @@ config SOC_SIFIVE
help
This enables support for SiFive SoC platform hardware.
+config SOC_STARFIVE
+ bool "StarFive SoCs"
+ select PINCTRL
+ select RESET_CONTROLLER
+ select SIFIVE_PLIC
+ help
+ This enables support for StarFive SoC platform hardware.
+
config SOC_VIRT
bool "QEMU Virt Machine"
select CLINT_TIMER if RISCV_M_MODE
--
2.33.1
From: Geert Uytterhoeven <[email protected]>
Add bindings for the clock generator on the JH7100 RISC-V SoC by
StarFive Ltd. This is a test chip for their upcoming JH7110 SoC.
Signed-off-by: Geert Uytterhoeven <[email protected]>
Signed-off-by: Emil Renner Berthing <[email protected]>
Reviewed-by: Rob Herring <[email protected]>
---
.../clock/starfive,jh7100-clkgen.yaml | 56 +++++++++++++++++++
1 file changed, 56 insertions(+)
create mode 100644 Documentation/devicetree/bindings/clock/starfive,jh7100-clkgen.yaml
diff --git a/Documentation/devicetree/bindings/clock/starfive,jh7100-clkgen.yaml b/Documentation/devicetree/bindings/clock/starfive,jh7100-clkgen.yaml
new file mode 100644
index 000000000000..12f17b60ecbe
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/starfive,jh7100-clkgen.yaml
@@ -0,0 +1,56 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/starfive,jh7100-clkgen.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: StarFive JH7100 Clock Generator
+
+maintainers:
+ - Geert Uytterhoeven <[email protected]>
+ - Emil Renner Berthing <[email protected]>
+
+properties:
+ compatible:
+ const: starfive,jh7100-clkgen
+
+ reg:
+ maxItems: 1
+
+ clocks:
+ items:
+ - description: Main clock source (25 MHz)
+ - description: Application-specific clock source (12-27 MHz)
+ - description: RMII reference clock (50 MHz)
+ - description: RGMII RX clock (125 MHz)
+
+ clock-names:
+ items:
+ - const: osc_sys
+ - const: osc_aud
+ - const: gmac_rmii_ref
+ - const: gmac_gr_mii_rxclk
+
+ '#clock-cells':
+ const: 1
+ description:
+ See <dt-bindings/clock/starfive-jh7100.h> for valid indices.
+
+required:
+ - compatible
+ - reg
+ - clocks
+ - clock-names
+ - '#clock-cells'
+
+additionalProperties: false
+
+examples:
+ - |
+ clock-controller@11800000 {
+ compatible = "starfive,jh7100-clkgen";
+ reg = <0x11800000 0x10000>;
+ clocks = <&osc_sys>, <&osc_aud>, <&gmac_rmii_ref>, <&gmac_gr_mii_rxclk>;
+ clock-names = "osc_sys", "osc_aud", "gmac_rmii_ref", "gmac_gr_mii_rxclk";
+ #clock-cells = <1>;
+ };
--
2.33.1
Add compatible string for StarFive JH7100 plic.
Signed-off-by: Emil Renner Berthing <[email protected]>
Reviewed-by: Geert Uytterhoeven <[email protected]>
Acked-by: Rob Herring <[email protected]>
---
.../bindings/interrupt-controller/sifive,plic-1.0.0.yaml | 1 +
1 file changed, 1 insertion(+)
diff --git a/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml b/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml
index 08d5a57ce00f..28b6b17fe4b2 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml
+++ b/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml
@@ -45,6 +45,7 @@ properties:
items:
- enum:
- sifive,fu540-c000-plic
+ - starfive,jh7100-plic
- canaan,k210-plic
- const: sifive,plic-1.0.0
--
2.33.1
From: Geert Uytterhoeven <[email protected]>
Add all clock outputs for the StarFive JH7100 clock generator.
Based on work by Ahmad Fatoum for Barebox, with "JH7100_" prefixes added
to all definitions.
Signed-off-by: Geert Uytterhoeven <[email protected]>
Signed-off-by: Emil Renner Berthing <[email protected]>
Acked-by: Rob Herring <[email protected]>
---
include/dt-bindings/clock/starfive-jh7100.h | 202 ++++++++++++++++++++
1 file changed, 202 insertions(+)
create mode 100644 include/dt-bindings/clock/starfive-jh7100.h
diff --git a/include/dt-bindings/clock/starfive-jh7100.h b/include/dt-bindings/clock/starfive-jh7100.h
new file mode 100644
index 000000000000..aa0863b9728d
--- /dev/null
+++ b/include/dt-bindings/clock/starfive-jh7100.h
@@ -0,0 +1,202 @@
+/* SPDX-License-Identifier: GPL-2.0 OR MIT */
+/*
+ * Copyright (C) 2021 Ahmad Fatoum, Pengutronix
+ */
+
+#ifndef __DT_BINDINGS_CLOCK_STARFIVE_JH7100_H__
+#define __DT_BINDINGS_CLOCK_STARFIVE_JH7100_H__
+
+#define JH7100_CLK_CPUNDBUS_ROOT 0
+#define JH7100_CLK_DLA_ROOT 1
+#define JH7100_CLK_DSP_ROOT 2
+#define JH7100_CLK_GMACUSB_ROOT 3
+#define JH7100_CLK_PERH0_ROOT 4
+#define JH7100_CLK_PERH1_ROOT 5
+#define JH7100_CLK_VIN_ROOT 6
+#define JH7100_CLK_VOUT_ROOT 7
+#define JH7100_CLK_AUDIO_ROOT 8
+#define JH7100_CLK_CDECHIFI4_ROOT 9
+#define JH7100_CLK_CDEC_ROOT 10
+#define JH7100_CLK_VOUTBUS_ROOT 11
+#define JH7100_CLK_CPUNBUS_ROOT_DIV 12
+#define JH7100_CLK_DSP_ROOT_DIV 13
+#define JH7100_CLK_PERH0_SRC 14
+#define JH7100_CLK_PERH1_SRC 15
+#define JH7100_CLK_PLL0_TESTOUT 16
+#define JH7100_CLK_PLL1_TESTOUT 17
+#define JH7100_CLK_PLL2_TESTOUT 18
+#define JH7100_CLK_PLL2_REF 19
+#define JH7100_CLK_CPU_CORE 20
+#define JH7100_CLK_CPU_AXI 21
+#define JH7100_CLK_AHB_BUS 22
+#define JH7100_CLK_APB1_BUS 23
+#define JH7100_CLK_APB2_BUS 24
+#define JH7100_CLK_DOM3AHB_BUS 25
+#define JH7100_CLK_DOM7AHB_BUS 26
+#define JH7100_CLK_U74_CORE0 27
+#define JH7100_CLK_U74_CORE1 28
+#define JH7100_CLK_U74_AXI 29
+#define JH7100_CLK_U74RTC_TOGGLE 30
+#define JH7100_CLK_SGDMA2P_AXI 31
+#define JH7100_CLK_DMA2PNOC_AXI 32
+#define JH7100_CLK_SGDMA2P_AHB 33
+#define JH7100_CLK_DLA_BUS 34
+#define JH7100_CLK_DLA_AXI 35
+#define JH7100_CLK_DLANOC_AXI 36
+#define JH7100_CLK_DLA_APB 37
+#define JH7100_CLK_VP6_CORE 38
+#define JH7100_CLK_VP6BUS_SRC 39
+#define JH7100_CLK_VP6_AXI 40
+#define JH7100_CLK_VCDECBUS_SRC 41
+#define JH7100_CLK_VDEC_BUS 42
+#define JH7100_CLK_VDEC_AXI 43
+#define JH7100_CLK_VDECBRG_MAIN 44
+#define JH7100_CLK_VDEC_BCLK 45
+#define JH7100_CLK_VDEC_CCLK 46
+#define JH7100_CLK_VDEC_APB 47
+#define JH7100_CLK_JPEG_AXI 48
+#define JH7100_CLK_JPEG_CCLK 49
+#define JH7100_CLK_JPEG_APB 50
+#define JH7100_CLK_GC300_2X 51
+#define JH7100_CLK_GC300_AHB 52
+#define JH7100_CLK_JPCGC300_AXIBUS 53
+#define JH7100_CLK_GC300_AXI 54
+#define JH7100_CLK_JPCGC300_MAIN 55
+#define JH7100_CLK_VENC_BUS 56
+#define JH7100_CLK_VENC_AXI 57
+#define JH7100_CLK_VENCBRG_MAIN 58
+#define JH7100_CLK_VENC_BCLK 59
+#define JH7100_CLK_VENC_CCLK 60
+#define JH7100_CLK_VENC_APB 61
+#define JH7100_CLK_DDRPLL_DIV2 62
+#define JH7100_CLK_DDRPLL_DIV4 63
+#define JH7100_CLK_DDRPLL_DIV8 64
+#define JH7100_CLK_DDROSC_DIV2 65
+#define JH7100_CLK_DDRC0 66
+#define JH7100_CLK_DDRC1 67
+#define JH7100_CLK_DDRPHY_APB 68
+#define JH7100_CLK_NOC_ROB 69
+#define JH7100_CLK_NOC_COG 70
+#define JH7100_CLK_NNE_AHB 71
+#define JH7100_CLK_NNEBUS_SRC1 72
+#define JH7100_CLK_NNE_BUS 73
+#define JH7100_CLK_NNE_AXI 74
+#define JH7100_CLK_NNENOC_AXI 75
+#define JH7100_CLK_DLASLV_AXI 76
+#define JH7100_CLK_DSPX2C_AXI 77
+#define JH7100_CLK_HIFI4_SRC 78
+#define JH7100_CLK_HIFI4_COREFREE 79
+#define JH7100_CLK_HIFI4_CORE 80
+#define JH7100_CLK_HIFI4_BUS 81
+#define JH7100_CLK_HIFI4_AXI 82
+#define JH7100_CLK_HIFI4NOC_AXI 83
+#define JH7100_CLK_SGDMA1P_BUS 84
+#define JH7100_CLK_SGDMA1P_AXI 85
+#define JH7100_CLK_DMA1P_AXI 86
+#define JH7100_CLK_X2C_AXI 87
+#define JH7100_CLK_USB_BUS 88
+#define JH7100_CLK_USB_AXI 89
+#define JH7100_CLK_USBNOC_AXI 90
+#define JH7100_CLK_USBPHY_ROOTDIV 91
+#define JH7100_CLK_USBPHY_125M 92
+#define JH7100_CLK_USBPHY_PLLDIV25M 93
+#define JH7100_CLK_USBPHY_25M 94
+#define JH7100_CLK_AUDIO_DIV 95
+#define JH7100_CLK_AUDIO_SRC 96
+#define JH7100_CLK_AUDIO_12288 97
+#define JH7100_CLK_VIN_SRC 98
+#define JH7100_CLK_ISP0_BUS 99
+#define JH7100_CLK_ISP0_AXI 100
+#define JH7100_CLK_ISP0NOC_AXI 101
+#define JH7100_CLK_ISPSLV_AXI 102
+#define JH7100_CLK_ISP1_BUS 103
+#define JH7100_CLK_ISP1_AXI 104
+#define JH7100_CLK_ISP1NOC_AXI 105
+#define JH7100_CLK_VIN_BUS 106
+#define JH7100_CLK_VIN_AXI 107
+#define JH7100_CLK_VINNOC_AXI 108
+#define JH7100_CLK_VOUT_SRC 109
+#define JH7100_CLK_DISPBUS_SRC 110
+#define JH7100_CLK_DISP_BUS 111
+#define JH7100_CLK_DISP_AXI 112
+#define JH7100_CLK_DISPNOC_AXI 113
+#define JH7100_CLK_SDIO0_AHB 114
+#define JH7100_CLK_SDIO0_CCLKINT 115
+#define JH7100_CLK_SDIO0_CCLKINT_INV 116
+#define JH7100_CLK_SDIO1_AHB 117
+#define JH7100_CLK_SDIO1_CCLKINT 118
+#define JH7100_CLK_SDIO1_CCLKINT_INV 119
+#define JH7100_CLK_GMAC_AHB 120
+#define JH7100_CLK_GMAC_ROOT_DIV 121
+#define JH7100_CLK_GMAC_PTP_REF 122
+#define JH7100_CLK_GMAC_GTX 123
+#define JH7100_CLK_GMAC_RMII_TX 124
+#define JH7100_CLK_GMAC_RMII_RX 125
+#define JH7100_CLK_GMAC_TX 126
+#define JH7100_CLK_GMAC_TX_INV 127
+#define JH7100_CLK_GMAC_RX_PRE 128
+#define JH7100_CLK_GMAC_RX_INV 129
+#define JH7100_CLK_GMAC_RMII 130
+#define JH7100_CLK_GMAC_TOPHYREF 131
+#define JH7100_CLK_SPI2AHB_AHB 132
+#define JH7100_CLK_SPI2AHB_CORE 133
+#define JH7100_CLK_EZMASTER_AHB 134
+#define JH7100_CLK_E24_AHB 135
+#define JH7100_CLK_E24RTC_TOGGLE 136
+#define JH7100_CLK_QSPI_AHB 137
+#define JH7100_CLK_QSPI_APB 138
+#define JH7100_CLK_QSPI_REF 139
+#define JH7100_CLK_SEC_AHB 140
+#define JH7100_CLK_AES 141
+#define JH7100_CLK_SHA 142
+#define JH7100_CLK_PKA 143
+#define JH7100_CLK_TRNG_APB 144
+#define JH7100_CLK_OTP_APB 145
+#define JH7100_CLK_UART0_APB 146
+#define JH7100_CLK_UART0_CORE 147
+#define JH7100_CLK_UART1_APB 148
+#define JH7100_CLK_UART1_CORE 149
+#define JH7100_CLK_SPI0_APB 150
+#define JH7100_CLK_SPI0_CORE 151
+#define JH7100_CLK_SPI1_APB 152
+#define JH7100_CLK_SPI1_CORE 153
+#define JH7100_CLK_I2C0_APB 154
+#define JH7100_CLK_I2C0_CORE 155
+#define JH7100_CLK_I2C1_APB 156
+#define JH7100_CLK_I2C1_CORE 157
+#define JH7100_CLK_GPIO_APB 158
+#define JH7100_CLK_UART2_APB 159
+#define JH7100_CLK_UART2_CORE 160
+#define JH7100_CLK_UART3_APB 161
+#define JH7100_CLK_UART3_CORE 162
+#define JH7100_CLK_SPI2_APB 163
+#define JH7100_CLK_SPI2_CORE 164
+#define JH7100_CLK_SPI3_APB 165
+#define JH7100_CLK_SPI3_CORE 166
+#define JH7100_CLK_I2C2_APB 167
+#define JH7100_CLK_I2C2_CORE 168
+#define JH7100_CLK_I2C3_APB 169
+#define JH7100_CLK_I2C3_CORE 170
+#define JH7100_CLK_WDTIMER_APB 171
+#define JH7100_CLK_WDT_CORE 172
+#define JH7100_CLK_TIMER0_CORE 173
+#define JH7100_CLK_TIMER1_CORE 174
+#define JH7100_CLK_TIMER2_CORE 175
+#define JH7100_CLK_TIMER3_CORE 176
+#define JH7100_CLK_TIMER4_CORE 177
+#define JH7100_CLK_TIMER5_CORE 178
+#define JH7100_CLK_TIMER6_CORE 179
+#define JH7100_CLK_VP6INTC_APB 180
+#define JH7100_CLK_PWM_APB 181
+#define JH7100_CLK_MSI_APB 182
+#define JH7100_CLK_TEMP_APB 183
+#define JH7100_CLK_TEMP_SENSE 184
+#define JH7100_CLK_SYSERR_APB 185
+
+#define JH7100_CLK_PLL0_OUT 186
+#define JH7100_CLK_PLL1_OUT 187
+#define JH7100_CLK_PLL2_OUT 188
+
+#define JH7100_CLK_END 189
+
+#endif /* __DT_BINDINGS_CLOCK_STARFIVE_JH7100_H__ */
--
2.33.1
From: Geert Uytterhoeven <[email protected]>
Add a driver for the StarFive JH7100 clock generator.
Signed-off-by: Geert Uytterhoeven <[email protected]>
Co-developed-by: Emil Renner Berthing <[email protected]>
Signed-off-by: Emil Renner Berthing <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
---
MAINTAINERS | 7 +
drivers/clk/Kconfig | 1 +
drivers/clk/Makefile | 1 +
drivers/clk/starfive/Kconfig | 9 +
drivers/clk/starfive/Makefile | 3 +
drivers/clk/starfive/clk-starfive-jh7100.c | 689 +++++++++++++++++++++
6 files changed, 710 insertions(+)
create mode 100644 drivers/clk/starfive/Kconfig
create mode 100644 drivers/clk/starfive/Makefile
create mode 100644 drivers/clk/starfive/clk-starfive-jh7100.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 7a2345ce8521..2548ef1f8246 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -18130,6 +18130,13 @@ M: Ion Badulescu <[email protected]>
S: Odd Fixes
F: drivers/net/ethernet/adaptec/starfire*
+STARFIVE JH7100 CLOCK DRIVER
+M: Emil Renner Berthing <[email protected]>
+S: Maintained
+F: Documentation/devicetree/bindings/clock/starfive,jh7100-clkgen.yaml
+F: drivers/clk/starfive/clk-starfive-jh7100.c
+F: include/dt-bindings/clock/starfive-jh7100.h
+
STATIC BRANCH/CALL
M: Peter Zijlstra <[email protected]>
M: Josh Poimboeuf <[email protected]>
diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
index c5b3dc97396a..c91931c94888 100644
--- a/drivers/clk/Kconfig
+++ b/drivers/clk/Kconfig
@@ -412,6 +412,7 @@ source "drivers/clk/samsung/Kconfig"
source "drivers/clk/sifive/Kconfig"
source "drivers/clk/socfpga/Kconfig"
source "drivers/clk/sprd/Kconfig"
+source "drivers/clk/starfive/Kconfig"
source "drivers/clk/sunxi/Kconfig"
source "drivers/clk/sunxi-ng/Kconfig"
source "drivers/clk/tegra/Kconfig"
diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index e42312121e51..a9bb2478fbdd 100644
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -109,6 +109,7 @@ obj-y += socfpga/
obj-$(CONFIG_PLAT_SPEAR) += spear/
obj-y += sprd/
obj-$(CONFIG_ARCH_STI) += st/
+obj-$(CONFIG_SOC_STARFIVE) += starfive/
obj-$(CONFIG_ARCH_SUNXI) += sunxi/
obj-$(CONFIG_SUNXI_CCU) += sunxi-ng/
obj-$(CONFIG_ARCH_TEGRA) += tegra/
diff --git a/drivers/clk/starfive/Kconfig b/drivers/clk/starfive/Kconfig
new file mode 100644
index 000000000000..c0fa9d5e641f
--- /dev/null
+++ b/drivers/clk/starfive/Kconfig
@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0
+
+config CLK_STARFIVE_JH7100
+ bool "StarFive JH7100 clock support"
+ depends on SOC_STARFIVE || COMPILE_TEST
+ default SOC_STARFIVE
+ help
+ Say yes here to support the clock controller on the StarFive JH7100
+ SoC.
diff --git a/drivers/clk/starfive/Makefile b/drivers/clk/starfive/Makefile
new file mode 100644
index 000000000000..09759cc73530
--- /dev/null
+++ b/drivers/clk/starfive/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0
+# StarFive Clock
+obj-$(CONFIG_CLK_STARFIVE_JH7100) += clk-starfive-jh7100.o
diff --git a/drivers/clk/starfive/clk-starfive-jh7100.c b/drivers/clk/starfive/clk-starfive-jh7100.c
new file mode 100644
index 000000000000..f3d430d8c2a8
--- /dev/null
+++ b/drivers/clk/starfive/clk-starfive-jh7100.c
@@ -0,0 +1,689 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * StarFive JH7100 Clock Generator Driver
+ *
+ * Copyright 2021 Ahmad Fatoum, Pengutronix
+ * Copyright (C) 2021 Glider bv
+ * Copyright (C) 2021 Emil Renner Berthing <[email protected]>
+ */
+
+#include <linux/bits.h>
+#include <linux/clk-provider.h>
+#include <linux/debugfs.h>
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <dt-bindings/clock/starfive-jh7100.h>
+
+/* external clocks */
+#define JH7100_CLK_OSC_SYS (JH7100_CLK_END + 0)
+#define JH7100_CLK_OSC_AUD (JH7100_CLK_END + 1)
+#define JH7100_CLK_GMAC_RMII_REF (JH7100_CLK_END + 2)
+#define JH7100_CLK_GMAC_GR_MII_RX (JH7100_CLK_END + 3)
+
+/* register fields */
+#define JH7100_CLK_ENABLE BIT(31)
+#define JH7100_CLK_INVERT BIT(30)
+#define JH7100_CLK_MUX_MASK GENMASK(27, 24)
+#define JH7100_CLK_MUX_SHIFT 24
+#define JH7100_CLK_DIV_MASK GENMASK(23, 0)
+
+/* clock data */
+#define JH7100_GATE(_idx, _name, _flags, _parent) [_idx] = { \
+ .name = _name, \
+ .flags = CLK_SET_RATE_PARENT | (_flags), \
+ .max = JH7100_CLK_ENABLE, \
+ .parents = { [0] = _parent }, \
+}
+
+#define JH7100__DIV(_idx, _name, _max, _parent) [_idx] = { \
+ .name = _name, \
+ .flags = 0, \
+ .max = _max, \
+ .parents = { [0] = _parent }, \
+}
+
+#define JH7100_GDIV(_idx, _name, _flags, _max, _parent) [_idx] = { \
+ .name = _name, \
+ .flags = _flags, \
+ .max = JH7100_CLK_ENABLE | (_max), \
+ .parents = { [0] = _parent }, \
+}
+
+#define JH7100__MUX(_idx, _name, _nparents, ...) [_idx] = { \
+ .name = _name, \
+ .flags = 0, \
+ .max = ((_nparents) - 1) << JH7100_CLK_MUX_SHIFT, \
+ .parents = { __VA_ARGS__ }, \
+}
+
+#define JH7100_GMUX(_idx, _name, _flags, _nparents, ...) [_idx] = { \
+ .name = _name, \
+ .flags = _flags, \
+ .max = JH7100_CLK_ENABLE | \
+ (((_nparents) - 1) << JH7100_CLK_MUX_SHIFT), \
+ .parents = { __VA_ARGS__ }, \
+}
+
+#define JH7100__INV(_idx, _name, _parent) [_idx] = { \
+ .name = _name, \
+ .flags = CLK_SET_RATE_PARENT, \
+ .max = JH7100_CLK_INVERT, \
+ .parents = { [0] = _parent }, \
+}
+
+static const struct {
+ const char *name;
+ unsigned long flags;
+ u32 max;
+ u8 parents[4];
+} jh7100_clk_data[] __initconst = {
+ JH7100__MUX(JH7100_CLK_CPUNDBUS_ROOT, "cpundbus_root", 4,
+ JH7100_CLK_OSC_SYS,
+ JH7100_CLK_PLL0_OUT,
+ JH7100_CLK_PLL1_OUT,
+ JH7100_CLK_PLL2_OUT),
+ JH7100__MUX(JH7100_CLK_DLA_ROOT, "dla_root", 3,
+ JH7100_CLK_OSC_SYS,
+ JH7100_CLK_PLL1_OUT,
+ JH7100_CLK_PLL2_OUT),
+ JH7100__MUX(JH7100_CLK_DSP_ROOT, "dsp_root", 4,
+ JH7100_CLK_OSC_SYS,
+ JH7100_CLK_PLL0_OUT,
+ JH7100_CLK_PLL1_OUT,
+ JH7100_CLK_PLL2_OUT),
+ JH7100__MUX(JH7100_CLK_GMACUSB_ROOT, "gmacusb_root", 3,
+ JH7100_CLK_OSC_SYS,
+ JH7100_CLK_PLL0_OUT,
+ JH7100_CLK_PLL2_OUT),
+ JH7100__MUX(JH7100_CLK_PERH0_ROOT, "perh0_root", 2,
+ JH7100_CLK_OSC_SYS,
+ JH7100_CLK_PLL0_OUT),
+ JH7100__MUX(JH7100_CLK_PERH1_ROOT, "perh1_root", 2,
+ JH7100_CLK_OSC_SYS,
+ JH7100_CLK_PLL2_OUT),
+ JH7100__MUX(JH7100_CLK_VIN_ROOT, "vin_root", 3,
+ JH7100_CLK_OSC_SYS,
+ JH7100_CLK_PLL1_OUT,
+ JH7100_CLK_PLL2_OUT),
+ JH7100__MUX(JH7100_CLK_VOUT_ROOT, "vout_root", 3,
+ JH7100_CLK_OSC_AUD,
+ JH7100_CLK_PLL0_OUT,
+ JH7100_CLK_PLL2_OUT),
+ JH7100_GDIV(JH7100_CLK_AUDIO_ROOT, "audio_root", 0, 8, JH7100_CLK_PLL0_OUT),
+ JH7100__MUX(JH7100_CLK_CDECHIFI4_ROOT, "cdechifi4_root", 3,
+ JH7100_CLK_OSC_SYS,
+ JH7100_CLK_PLL1_OUT,
+ JH7100_CLK_PLL2_OUT),
+ JH7100__MUX(JH7100_CLK_CDEC_ROOT, "cdec_root", 3,
+ JH7100_CLK_OSC_SYS,
+ JH7100_CLK_PLL0_OUT,
+ JH7100_CLK_PLL1_OUT),
+ JH7100__MUX(JH7100_CLK_VOUTBUS_ROOT, "voutbus_root", 3,
+ JH7100_CLK_OSC_AUD,
+ JH7100_CLK_PLL0_OUT,
+ JH7100_CLK_PLL2_OUT),
+ JH7100__DIV(JH7100_CLK_CPUNBUS_ROOT_DIV, "cpunbus_root_div", 2, JH7100_CLK_CPUNDBUS_ROOT),
+ JH7100__DIV(JH7100_CLK_DSP_ROOT_DIV, "dsp_root_div", 4, JH7100_CLK_DSP_ROOT),
+ JH7100__DIV(JH7100_CLK_PERH0_SRC, "perh0_src", 4, JH7100_CLK_PERH0_ROOT),
+ JH7100__DIV(JH7100_CLK_PERH1_SRC, "perh1_src", 4, JH7100_CLK_PERH1_ROOT),
+ JH7100_GDIV(JH7100_CLK_PLL0_TESTOUT, "pll0_testout", 0, 31, JH7100_CLK_PERH0_SRC),
+ JH7100_GDIV(JH7100_CLK_PLL1_TESTOUT, "pll1_testout", 0, 31, JH7100_CLK_DLA_ROOT),
+ JH7100_GDIV(JH7100_CLK_PLL2_TESTOUT, "pll2_testout", 0, 31, JH7100_CLK_PERH1_SRC),
+ JH7100__MUX(JH7100_CLK_PLL2_REF, "pll2_refclk", 2,
+ JH7100_CLK_OSC_SYS,
+ JH7100_CLK_OSC_AUD),
+ JH7100__DIV(JH7100_CLK_CPU_CORE, "cpu_core", 8, JH7100_CLK_CPUNBUS_ROOT_DIV),
+ JH7100__DIV(JH7100_CLK_CPU_AXI, "cpu_axi", 8, JH7100_CLK_CPU_CORE),
+ JH7100__DIV(JH7100_CLK_AHB_BUS, "ahb_bus", 8, JH7100_CLK_CPUNBUS_ROOT_DIV),
+ JH7100__DIV(JH7100_CLK_APB1_BUS, "apb1_bus", 8, JH7100_CLK_AHB_BUS),
+ JH7100__DIV(JH7100_CLK_APB2_BUS, "apb2_bus", 8, JH7100_CLK_AHB_BUS),
+ JH7100_GATE(JH7100_CLK_DOM3AHB_BUS, "dom3ahb_bus", CLK_IS_CRITICAL, JH7100_CLK_AHB_BUS),
+ JH7100_GATE(JH7100_CLK_DOM7AHB_BUS, "dom7ahb_bus", CLK_IS_CRITICAL, JH7100_CLK_AHB_BUS),
+ JH7100_GATE(JH7100_CLK_U74_CORE0, "u74_core0", CLK_IS_CRITICAL, JH7100_CLK_CPU_CORE),
+ JH7100_GDIV(JH7100_CLK_U74_CORE1, "u74_core1", CLK_IS_CRITICAL, 8, JH7100_CLK_CPU_CORE),
+ JH7100_GATE(JH7100_CLK_U74_AXI, "u74_axi", CLK_IS_CRITICAL, JH7100_CLK_CPU_AXI),
+ JH7100_GATE(JH7100_CLK_U74RTC_TOGGLE, "u74rtc_toggle", CLK_IS_CRITICAL, JH7100_CLK_OSC_SYS),
+ JH7100_GATE(JH7100_CLK_SGDMA2P_AXI, "sgdma2p_axi", 0, JH7100_CLK_CPU_AXI),
+ JH7100_GATE(JH7100_CLK_DMA2PNOC_AXI, "dma2pnoc_axi", 0, JH7100_CLK_CPU_AXI),
+ JH7100_GATE(JH7100_CLK_SGDMA2P_AHB, "sgdma2p_ahb", 0, JH7100_CLK_AHB_BUS),
+ JH7100__DIV(JH7100_CLK_DLA_BUS, "dla_bus", 4, JH7100_CLK_DLA_ROOT),
+ JH7100_GATE(JH7100_CLK_DLA_AXI, "dla_axi", 0, JH7100_CLK_DLA_BUS),
+ JH7100_GATE(JH7100_CLK_DLANOC_AXI, "dlanoc_axi", 0, JH7100_CLK_DLA_BUS),
+ JH7100_GATE(JH7100_CLK_DLA_APB, "dla_apb", 0, JH7100_CLK_APB1_BUS),
+ JH7100_GDIV(JH7100_CLK_VP6_CORE, "vp6_core", 0, 4, JH7100_CLK_DSP_ROOT_DIV),
+ JH7100__DIV(JH7100_CLK_VP6BUS_SRC, "vp6bus_src", 4, JH7100_CLK_DSP_ROOT),
+ JH7100_GDIV(JH7100_CLK_VP6_AXI, "vp6_axi", 0, 4, JH7100_CLK_VP6BUS_SRC),
+ JH7100__DIV(JH7100_CLK_VCDECBUS_SRC, "vcdecbus_src", 4, JH7100_CLK_CDECHIFI4_ROOT),
+ JH7100__DIV(JH7100_CLK_VDEC_BUS, "vdec_bus", 8, JH7100_CLK_VCDECBUS_SRC),
+ JH7100_GATE(JH7100_CLK_VDEC_AXI, "vdec_axi", 0, JH7100_CLK_VDEC_BUS),
+ JH7100_GATE(JH7100_CLK_VDECBRG_MAIN, "vdecbrg_mainclk", 0, JH7100_CLK_VDEC_BUS),
+ JH7100_GDIV(JH7100_CLK_VDEC_BCLK, "vdec_bclk", 0, 8, JH7100_CLK_VCDECBUS_SRC),
+ JH7100_GDIV(JH7100_CLK_VDEC_CCLK, "vdec_cclk", 0, 8, JH7100_CLK_CDEC_ROOT),
+ JH7100_GATE(JH7100_CLK_VDEC_APB, "vdec_apb", 0, JH7100_CLK_APB1_BUS),
+ JH7100_GDIV(JH7100_CLK_JPEG_AXI, "jpeg_axi", 0, 8, JH7100_CLK_CPUNBUS_ROOT_DIV),
+ JH7100_GDIV(JH7100_CLK_JPEG_CCLK, "jpeg_cclk", 0, 8, JH7100_CLK_CPUNBUS_ROOT_DIV),
+ JH7100_GATE(JH7100_CLK_JPEG_APB, "jpeg_apb", 0, JH7100_CLK_APB1_BUS),
+ JH7100_GDIV(JH7100_CLK_GC300_2X, "gc300_2x", 0, 8, JH7100_CLK_CDECHIFI4_ROOT),
+ JH7100_GATE(JH7100_CLK_GC300_AHB, "gc300_ahb", 0, JH7100_CLK_AHB_BUS),
+ JH7100__DIV(JH7100_CLK_JPCGC300_AXIBUS, "jpcgc300_axibus", 8, JH7100_CLK_VCDECBUS_SRC),
+ JH7100_GATE(JH7100_CLK_GC300_AXI, "gc300_axi", 0, JH7100_CLK_JPCGC300_AXIBUS),
+ JH7100_GATE(JH7100_CLK_JPCGC300_MAIN, "jpcgc300_mainclk", 0, JH7100_CLK_JPCGC300_AXIBUS),
+ JH7100__DIV(JH7100_CLK_VENC_BUS, "venc_bus", 8, JH7100_CLK_VCDECBUS_SRC),
+ JH7100_GATE(JH7100_CLK_VENC_AXI, "venc_axi", 0, JH7100_CLK_VENC_BUS),
+ JH7100_GATE(JH7100_CLK_VENCBRG_MAIN, "vencbrg_mainclk", 0, JH7100_CLK_VENC_BUS),
+ JH7100_GDIV(JH7100_CLK_VENC_BCLK, "venc_bclk", 0, 8, JH7100_CLK_VCDECBUS_SRC),
+ JH7100_GDIV(JH7100_CLK_VENC_CCLK, "venc_cclk", 0, 8, JH7100_CLK_CDEC_ROOT),
+ JH7100_GATE(JH7100_CLK_VENC_APB, "venc_apb", 0, JH7100_CLK_APB1_BUS),
+ JH7100_GDIV(JH7100_CLK_DDRPLL_DIV2, "ddrpll_div2", CLK_IS_CRITICAL, 2, JH7100_CLK_PLL1_OUT),
+ JH7100_GDIV(JH7100_CLK_DDRPLL_DIV4, "ddrpll_div4", CLK_IS_CRITICAL, 2, JH7100_CLK_DDRPLL_DIV2),
+ JH7100_GDIV(JH7100_CLK_DDRPLL_DIV8, "ddrpll_div8", CLK_IS_CRITICAL, 2, JH7100_CLK_DDRPLL_DIV4),
+ JH7100_GDIV(JH7100_CLK_DDROSC_DIV2, "ddrosc_div2", CLK_IS_CRITICAL, 2, JH7100_CLK_OSC_SYS),
+ JH7100_GMUX(JH7100_CLK_DDRC0, "ddrc0", CLK_IS_CRITICAL, 4,
+ JH7100_CLK_DDROSC_DIV2,
+ JH7100_CLK_DDRPLL_DIV2,
+ JH7100_CLK_DDRPLL_DIV4,
+ JH7100_CLK_DDRPLL_DIV8),
+ JH7100_GMUX(JH7100_CLK_DDRC1, "ddrc1", CLK_IS_CRITICAL, 4,
+ JH7100_CLK_DDROSC_DIV2,
+ JH7100_CLK_DDRPLL_DIV2,
+ JH7100_CLK_DDRPLL_DIV4,
+ JH7100_CLK_DDRPLL_DIV8),
+ JH7100_GATE(JH7100_CLK_DDRPHY_APB, "ddrphy_apb", 0, JH7100_CLK_APB1_BUS),
+ JH7100__DIV(JH7100_CLK_NOC_ROB, "noc_rob", 8, JH7100_CLK_CPUNBUS_ROOT_DIV),
+ JH7100__DIV(JH7100_CLK_NOC_COG, "noc_cog", 8, JH7100_CLK_DLA_ROOT),
+ JH7100_GATE(JH7100_CLK_NNE_AHB, "nne_ahb", 0, JH7100_CLK_AHB_BUS),
+ JH7100__DIV(JH7100_CLK_NNEBUS_SRC1, "nnebus_src1", 4, JH7100_CLK_DSP_ROOT),
+ JH7100__MUX(JH7100_CLK_NNE_BUS, "nne_bus", 2,
+ JH7100_CLK_CPU_AXI,
+ JH7100_CLK_NNEBUS_SRC1),
+ JH7100_GATE(JH7100_CLK_NNE_AXI, "nne_axi", 0, JH7100_CLK_NNE_BUS),
+ JH7100_GATE(JH7100_CLK_NNENOC_AXI, "nnenoc_axi", 0, JH7100_CLK_NNE_BUS),
+ JH7100_GATE(JH7100_CLK_DLASLV_AXI, "dlaslv_axi", 0, JH7100_CLK_NNE_BUS),
+ JH7100_GATE(JH7100_CLK_DSPX2C_AXI, "dspx2c_axi", CLK_IS_CRITICAL, JH7100_CLK_NNE_BUS),
+ JH7100__DIV(JH7100_CLK_HIFI4_SRC, "hifi4_src", 4, JH7100_CLK_CDECHIFI4_ROOT),
+ JH7100__DIV(JH7100_CLK_HIFI4_COREFREE, "hifi4_corefree", 8, JH7100_CLK_HIFI4_SRC),
+ JH7100_GATE(JH7100_CLK_HIFI4_CORE, "hifi4_core", 0, JH7100_CLK_HIFI4_COREFREE),
+ JH7100__DIV(JH7100_CLK_HIFI4_BUS, "hifi4_bus", 8, JH7100_CLK_HIFI4_COREFREE),
+ JH7100_GATE(JH7100_CLK_HIFI4_AXI, "hifi4_axi", 0, JH7100_CLK_HIFI4_BUS),
+ JH7100_GATE(JH7100_CLK_HIFI4NOC_AXI, "hifi4noc_axi", 0, JH7100_CLK_HIFI4_BUS),
+ JH7100__DIV(JH7100_CLK_SGDMA1P_BUS, "sgdma1p_bus", 8, JH7100_CLK_CPUNBUS_ROOT_DIV),
+ JH7100_GATE(JH7100_CLK_SGDMA1P_AXI, "sgdma1p_axi", 0, JH7100_CLK_SGDMA1P_BUS),
+ JH7100_GATE(JH7100_CLK_DMA1P_AXI, "dma1p_axi", 0, JH7100_CLK_SGDMA1P_BUS),
+ JH7100_GDIV(JH7100_CLK_X2C_AXI, "x2c_axi", CLK_IS_CRITICAL, 8, JH7100_CLK_CPUNBUS_ROOT_DIV),
+ JH7100__DIV(JH7100_CLK_USB_BUS, "usb_bus", 8, JH7100_CLK_CPUNBUS_ROOT_DIV),
+ JH7100_GATE(JH7100_CLK_USB_AXI, "usb_axi", 0, JH7100_CLK_USB_BUS),
+ JH7100_GATE(JH7100_CLK_USBNOC_AXI, "usbnoc_axi", 0, JH7100_CLK_USB_BUS),
+ JH7100__DIV(JH7100_CLK_USBPHY_ROOTDIV, "usbphy_rootdiv", 4, JH7100_CLK_GMACUSB_ROOT),
+ JH7100_GDIV(JH7100_CLK_USBPHY_125M, "usbphy_125m", 0, 8, JH7100_CLK_USBPHY_ROOTDIV),
+ JH7100_GDIV(JH7100_CLK_USBPHY_PLLDIV25M, "usbphy_plldiv25m", 0, 32, JH7100_CLK_USBPHY_ROOTDIV),
+ JH7100__MUX(JH7100_CLK_USBPHY_25M, "usbphy_25m", 2,
+ JH7100_CLK_OSC_SYS,
+ JH7100_CLK_USBPHY_PLLDIV25M),
+ JH7100__DIV(JH7100_CLK_AUDIO_DIV, "audio_div", 131072, JH7100_CLK_AUDIO_ROOT),
+ JH7100_GATE(JH7100_CLK_AUDIO_SRC, "audio_src", 0, JH7100_CLK_AUDIO_DIV),
+ JH7100_GATE(JH7100_CLK_AUDIO_12288, "audio_12288", 0, JH7100_CLK_OSC_AUD),
+ JH7100_GDIV(JH7100_CLK_VIN_SRC, "vin_src", 0, 4, JH7100_CLK_VIN_ROOT),
+ JH7100__DIV(JH7100_CLK_ISP0_BUS, "isp0_bus", 8, JH7100_CLK_VIN_SRC),
+ JH7100_GATE(JH7100_CLK_ISP0_AXI, "isp0_axi", 0, JH7100_CLK_ISP0_BUS),
+ JH7100_GATE(JH7100_CLK_ISP0NOC_AXI, "isp0noc_axi", 0, JH7100_CLK_ISP0_BUS),
+ JH7100_GATE(JH7100_CLK_ISPSLV_AXI, "ispslv_axi", 0, JH7100_CLK_ISP0_BUS),
+ JH7100__DIV(JH7100_CLK_ISP1_BUS, "isp1_bus", 8, JH7100_CLK_VIN_SRC),
+ JH7100_GATE(JH7100_CLK_ISP1_AXI, "isp1_axi", 0, JH7100_CLK_ISP1_BUS),
+ JH7100_GATE(JH7100_CLK_ISP1NOC_AXI, "isp1noc_axi", 0, JH7100_CLK_ISP1_BUS),
+ JH7100__DIV(JH7100_CLK_VIN_BUS, "vin_bus", 8, JH7100_CLK_VIN_SRC),
+ JH7100_GATE(JH7100_CLK_VIN_AXI, "vin_axi", 0, JH7100_CLK_VIN_BUS),
+ JH7100_GATE(JH7100_CLK_VINNOC_AXI, "vinnoc_axi", 0, JH7100_CLK_VIN_BUS),
+ JH7100_GDIV(JH7100_CLK_VOUT_SRC, "vout_src", 0, 4, JH7100_CLK_VOUT_ROOT),
+ JH7100__DIV(JH7100_CLK_DISPBUS_SRC, "dispbus_src", 4, JH7100_CLK_VOUTBUS_ROOT),
+ JH7100__DIV(JH7100_CLK_DISP_BUS, "disp_bus", 4, JH7100_CLK_DISPBUS_SRC),
+ JH7100_GATE(JH7100_CLK_DISP_AXI, "disp_axi", 0, JH7100_CLK_DISP_BUS),
+ JH7100_GATE(JH7100_CLK_DISPNOC_AXI, "dispnoc_axi", 0, JH7100_CLK_DISP_BUS),
+ JH7100_GATE(JH7100_CLK_SDIO0_AHB, "sdio0_ahb", 0, JH7100_CLK_AHB_BUS),
+ JH7100_GDIV(JH7100_CLK_SDIO0_CCLKINT, "sdio0_cclkint", 0, 24, JH7100_CLK_PERH0_SRC),
+ JH7100__INV(JH7100_CLK_SDIO0_CCLKINT_INV, "sdio0_cclkint_inv", JH7100_CLK_SDIO0_CCLKINT),
+ JH7100_GATE(JH7100_CLK_SDIO1_AHB, "sdio1_ahb", 0, JH7100_CLK_AHB_BUS),
+ JH7100_GDIV(JH7100_CLK_SDIO1_CCLKINT, "sdio1_cclkint", 0, 24, JH7100_CLK_PERH1_SRC),
+ JH7100__INV(JH7100_CLK_SDIO1_CCLKINT_INV, "sdio1_cclkint_inv", JH7100_CLK_SDIO1_CCLKINT),
+ JH7100_GATE(JH7100_CLK_GMAC_AHB, "gmac_ahb", 0, JH7100_CLK_AHB_BUS),
+ JH7100__DIV(JH7100_CLK_GMAC_ROOT_DIV, "gmac_root_div", 8, JH7100_CLK_GMACUSB_ROOT),
+ JH7100_GDIV(JH7100_CLK_GMAC_PTP_REF, "gmac_ptp_refclk", 0, 31, JH7100_CLK_GMAC_ROOT_DIV),
+ JH7100_GDIV(JH7100_CLK_GMAC_GTX, "gmac_gtxclk", 0, 255, JH7100_CLK_GMAC_ROOT_DIV),
+ JH7100_GDIV(JH7100_CLK_GMAC_RMII_TX, "gmac_rmii_txclk", 0, 8, JH7100_CLK_GMAC_RMII_REF),
+ JH7100_GDIV(JH7100_CLK_GMAC_RMII_RX, "gmac_rmii_rxclk", 0, 8, JH7100_CLK_GMAC_RMII_REF),
+ JH7100__MUX(JH7100_CLK_GMAC_TX, "gmac_tx", 3,
+ JH7100_CLK_GMAC_GTX,
+ JH7100_CLK_GMAC_TX_INV,
+ JH7100_CLK_GMAC_RMII_TX),
+ JH7100__INV(JH7100_CLK_GMAC_TX_INV, "gmac_tx_inv", JH7100_CLK_GMAC_TX),
+ JH7100__MUX(JH7100_CLK_GMAC_RX_PRE, "gmac_rx_pre", 2,
+ JH7100_CLK_GMAC_GR_MII_RX,
+ JH7100_CLK_GMAC_RMII_RX),
+ JH7100__INV(JH7100_CLK_GMAC_RX_INV, "gmac_rx_inv", JH7100_CLK_GMAC_RX_PRE),
+ JH7100_GATE(JH7100_CLK_GMAC_RMII, "gmac_rmii", 0, JH7100_CLK_GMAC_RMII_REF),
+ JH7100_GDIV(JH7100_CLK_GMAC_TOPHYREF, "gmac_tophyref", 0, 127, JH7100_CLK_GMAC_ROOT_DIV),
+ JH7100_GATE(JH7100_CLK_SPI2AHB_AHB, "spi2ahb_ahb", 0, JH7100_CLK_AHB_BUS),
+ JH7100_GDIV(JH7100_CLK_SPI2AHB_CORE, "spi2ahb_core", 0, 31, JH7100_CLK_PERH0_SRC),
+ JH7100_GATE(JH7100_CLK_EZMASTER_AHB, "ezmaster_ahb", 0, JH7100_CLK_AHB_BUS),
+ JH7100_GATE(JH7100_CLK_E24_AHB, "e24_ahb", 0, JH7100_CLK_AHB_BUS),
+ JH7100_GATE(JH7100_CLK_E24RTC_TOGGLE, "e24rtc_toggle", 0, JH7100_CLK_OSC_SYS),
+ JH7100_GATE(JH7100_CLK_QSPI_AHB, "qspi_ahb", 0, JH7100_CLK_AHB_BUS),
+ JH7100_GATE(JH7100_CLK_QSPI_APB, "qspi_apb", 0, JH7100_CLK_APB1_BUS),
+ JH7100_GDIV(JH7100_CLK_QSPI_REF, "qspi_refclk", 0, 31, JH7100_CLK_PERH0_SRC),
+ JH7100_GATE(JH7100_CLK_SEC_AHB, "sec_ahb", 0, JH7100_CLK_AHB_BUS),
+ JH7100_GATE(JH7100_CLK_AES, "aes_clk", 0, JH7100_CLK_SEC_AHB),
+ JH7100_GATE(JH7100_CLK_SHA, "sha_clk", 0, JH7100_CLK_SEC_AHB),
+ JH7100_GATE(JH7100_CLK_PKA, "pka_clk", 0, JH7100_CLK_SEC_AHB),
+ JH7100_GATE(JH7100_CLK_TRNG_APB, "trng_apb", 0, JH7100_CLK_APB1_BUS),
+ JH7100_GATE(JH7100_CLK_OTP_APB, "otp_apb", 0, JH7100_CLK_APB1_BUS),
+ JH7100_GATE(JH7100_CLK_UART0_APB, "uart0_apb", 0, JH7100_CLK_APB1_BUS),
+ JH7100_GDIV(JH7100_CLK_UART0_CORE, "uart0_core", 0, 63, JH7100_CLK_PERH1_SRC),
+ JH7100_GATE(JH7100_CLK_UART1_APB, "uart1_apb", 0, JH7100_CLK_APB1_BUS),
+ JH7100_GDIV(JH7100_CLK_UART1_CORE, "uart1_core", 0, 63, JH7100_CLK_PERH1_SRC),
+ JH7100_GATE(JH7100_CLK_SPI0_APB, "spi0_apb", 0, JH7100_CLK_APB1_BUS),
+ JH7100_GDIV(JH7100_CLK_SPI0_CORE, "spi0_core", 0, 63, JH7100_CLK_PERH1_SRC),
+ JH7100_GATE(JH7100_CLK_SPI1_APB, "spi1_apb", 0, JH7100_CLK_APB1_BUS),
+ JH7100_GDIV(JH7100_CLK_SPI1_CORE, "spi1_core", 0, 63, JH7100_CLK_PERH1_SRC),
+ JH7100_GATE(JH7100_CLK_I2C0_APB, "i2c0_apb", 0, JH7100_CLK_APB1_BUS),
+ JH7100_GDIV(JH7100_CLK_I2C0_CORE, "i2c0_core", 0, 63, JH7100_CLK_PERH1_SRC),
+ JH7100_GATE(JH7100_CLK_I2C1_APB, "i2c1_apb", 0, JH7100_CLK_APB1_BUS),
+ JH7100_GDIV(JH7100_CLK_I2C1_CORE, "i2c1_core", 0, 63, JH7100_CLK_PERH1_SRC),
+ JH7100_GATE(JH7100_CLK_GPIO_APB, "gpio_apb", 0, JH7100_CLK_APB1_BUS),
+ JH7100_GATE(JH7100_CLK_UART2_APB, "uart2_apb", 0, JH7100_CLK_APB2_BUS),
+ JH7100_GDIV(JH7100_CLK_UART2_CORE, "uart2_core", 0, 63, JH7100_CLK_PERH0_SRC),
+ JH7100_GATE(JH7100_CLK_UART3_APB, "uart3_apb", 0, JH7100_CLK_APB2_BUS),
+ JH7100_GDIV(JH7100_CLK_UART3_CORE, "uart3_core", 0, 63, JH7100_CLK_PERH0_SRC),
+ JH7100_GATE(JH7100_CLK_SPI2_APB, "spi2_apb", 0, JH7100_CLK_APB2_BUS),
+ JH7100_GDIV(JH7100_CLK_SPI2_CORE, "spi2_core", 0, 63, JH7100_CLK_PERH0_SRC),
+ JH7100_GATE(JH7100_CLK_SPI3_APB, "spi3_apb", 0, JH7100_CLK_APB2_BUS),
+ JH7100_GDIV(JH7100_CLK_SPI3_CORE, "spi3_core", 0, 63, JH7100_CLK_PERH0_SRC),
+ JH7100_GATE(JH7100_CLK_I2C2_APB, "i2c2_apb", 0, JH7100_CLK_APB2_BUS),
+ JH7100_GDIV(JH7100_CLK_I2C2_CORE, "i2c2_core", 0, 63, JH7100_CLK_PERH0_SRC),
+ JH7100_GATE(JH7100_CLK_I2C3_APB, "i2c3_apb", 0, JH7100_CLK_APB2_BUS),
+ JH7100_GDIV(JH7100_CLK_I2C3_CORE, "i2c3_core", 0, 63, JH7100_CLK_PERH0_SRC),
+ JH7100_GATE(JH7100_CLK_WDTIMER_APB, "wdtimer_apb", 0, JH7100_CLK_APB2_BUS),
+ JH7100_GDIV(JH7100_CLK_WDT_CORE, "wdt_coreclk", 0, 63, JH7100_CLK_PERH0_SRC),
+ JH7100_GDIV(JH7100_CLK_TIMER0_CORE, "timer0_coreclk", 0, 63, JH7100_CLK_PERH0_SRC),
+ JH7100_GDIV(JH7100_CLK_TIMER1_CORE, "timer1_coreclk", 0, 63, JH7100_CLK_PERH0_SRC),
+ JH7100_GDIV(JH7100_CLK_TIMER2_CORE, "timer2_coreclk", 0, 63, JH7100_CLK_PERH0_SRC),
+ JH7100_GDIV(JH7100_CLK_TIMER3_CORE, "timer3_coreclk", 0, 63, JH7100_CLK_PERH0_SRC),
+ JH7100_GDIV(JH7100_CLK_TIMER4_CORE, "timer4_coreclk", 0, 63, JH7100_CLK_PERH0_SRC),
+ JH7100_GDIV(JH7100_CLK_TIMER5_CORE, "timer5_coreclk", 0, 63, JH7100_CLK_PERH0_SRC),
+ JH7100_GDIV(JH7100_CLK_TIMER6_CORE, "timer6_coreclk", 0, 63, JH7100_CLK_PERH0_SRC),
+ JH7100_GATE(JH7100_CLK_VP6INTC_APB, "vp6intc_apb", 0, JH7100_CLK_APB2_BUS),
+ JH7100_GATE(JH7100_CLK_PWM_APB, "pwm_apb", 0, JH7100_CLK_APB2_BUS),
+ JH7100_GATE(JH7100_CLK_MSI_APB, "msi_apb", 0, JH7100_CLK_APB2_BUS),
+ JH7100_GATE(JH7100_CLK_TEMP_APB, "temp_apb", 0, JH7100_CLK_APB2_BUS),
+ JH7100_GDIV(JH7100_CLK_TEMP_SENSE, "temp_sense", 0, 31, JH7100_CLK_OSC_SYS),
+ JH7100_GATE(JH7100_CLK_SYSERR_APB, "syserr_apb", 0, JH7100_CLK_APB2_BUS),
+};
+
+struct jh7100_clk {
+ struct clk_hw hw;
+ unsigned int idx;
+ unsigned int max_div;
+};
+
+struct clk_starfive_jh7100_priv {
+ /* protect clk enable and set rate/parent from happening at the same time */
+ spinlock_t rmw_lock;
+ struct device *dev;
+ void __iomem *base;
+ struct clk_hw *pll[3];
+ struct jh7100_clk reg[JH7100_CLK_PLL0_OUT];
+};
+
+static struct jh7100_clk *jh7100_clk_from(struct clk_hw *hw)
+{
+ return container_of(hw, struct jh7100_clk, hw);
+}
+
+static struct clk_starfive_jh7100_priv *jh7100_priv_from(struct jh7100_clk *clk)
+{
+ return container_of(clk, struct clk_starfive_jh7100_priv, reg[clk->idx]);
+}
+
+static u32 jh7100_clk_reg_get(struct jh7100_clk *clk)
+{
+ struct clk_starfive_jh7100_priv *priv = jh7100_priv_from(clk);
+ void __iomem *reg = priv->base + 4 * clk->idx;
+
+ return readl_relaxed(reg);
+}
+
+static void jh7100_clk_reg_rmw(struct jh7100_clk *clk, u32 mask, u32 value)
+{
+ struct clk_starfive_jh7100_priv *priv = jh7100_priv_from(clk);
+ void __iomem *reg = priv->base + 4 * clk->idx;
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->rmw_lock, flags);
+ value |= readl_relaxed(reg) & ~mask;
+ writel_relaxed(value, reg);
+ spin_unlock_irqrestore(&priv->rmw_lock, flags);
+}
+
+static int jh7100_clk_enable(struct clk_hw *hw)
+{
+ struct jh7100_clk *clk = jh7100_clk_from(hw);
+
+ jh7100_clk_reg_rmw(clk, JH7100_CLK_ENABLE, JH7100_CLK_ENABLE);
+ return 0;
+}
+
+static void jh7100_clk_disable(struct clk_hw *hw)
+{
+ struct jh7100_clk *clk = jh7100_clk_from(hw);
+
+ jh7100_clk_reg_rmw(clk, JH7100_CLK_ENABLE, 0);
+}
+
+static int jh7100_clk_is_enabled(struct clk_hw *hw)
+{
+ struct jh7100_clk *clk = jh7100_clk_from(hw);
+
+ return !!(jh7100_clk_reg_get(clk) & JH7100_CLK_ENABLE);
+}
+
+static unsigned long jh7100_clk_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct jh7100_clk *clk = jh7100_clk_from(hw);
+ u32 div = jh7100_clk_reg_get(clk) & JH7100_CLK_DIV_MASK;
+
+ return div ? parent_rate / div : 0;
+}
+
+static unsigned long jh7100_clk_bestdiv(struct jh7100_clk *clk,
+ unsigned long rate, unsigned long parent)
+{
+ unsigned long max = clk->max_div;
+ unsigned long div = DIV_ROUND_UP(parent, rate);
+
+ return min(div, max);
+}
+
+static int jh7100_clk_determine_rate(struct clk_hw *hw,
+ struct clk_rate_request *req)
+{
+ struct jh7100_clk *clk = jh7100_clk_from(hw);
+ unsigned long parent = req->best_parent_rate;
+ unsigned long rate = clamp(req->rate, req->min_rate, req->max_rate);
+ unsigned long div = jh7100_clk_bestdiv(clk, rate, parent);
+ unsigned long result = parent / div;
+
+ /*
+ * we want the result clamped by min_rate and max_rate if possible:
+ * case 1: div hits the max divider value, which means it's less than
+ * parent / rate, so the result is greater than rate and min_rate in
+ * particular. we can't do anything about result > max_rate because the
+ * divider doesn't go any further.
+ * case 2: div = DIV_ROUND_UP(parent, rate) which means the result is
+ * always lower or equal to rate and max_rate. however the result may
+ * turn out lower than min_rate, but then the next higher rate is fine:
+ * div - 1 = ceil(parent / rate) - 1 < parent / rate
+ * and thus
+ * min_rate <= rate < parent / (div - 1)
+ */
+ if (result < req->min_rate && div > 1)
+ result = parent / (div - 1);
+
+ req->rate = result;
+ return 0;
+}
+
+static int jh7100_clk_set_rate(struct clk_hw *hw,
+ unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct jh7100_clk *clk = jh7100_clk_from(hw);
+ unsigned long div = jh7100_clk_bestdiv(clk, rate, parent_rate);
+
+ jh7100_clk_reg_rmw(clk, JH7100_CLK_DIV_MASK, div);
+ return 0;
+}
+
+static u8 jh7100_clk_get_parent(struct clk_hw *hw)
+{
+ struct jh7100_clk *clk = jh7100_clk_from(hw);
+ u32 value = jh7100_clk_reg_get(clk);
+
+ return (value & JH7100_CLK_MUX_MASK) >> JH7100_CLK_MUX_SHIFT;
+}
+
+static int jh7100_clk_set_parent(struct clk_hw *hw, u8 index)
+{
+ struct jh7100_clk *clk = jh7100_clk_from(hw);
+ u32 value = (u32)index << JH7100_CLK_MUX_SHIFT;
+
+ jh7100_clk_reg_rmw(clk, JH7100_CLK_MUX_MASK, value);
+ return 0;
+}
+
+static int jh7100_clk_mux_determine_rate(struct clk_hw *hw,
+ struct clk_rate_request *req)
+{
+ return clk_mux_determine_rate_flags(hw, req, 0);
+}
+
+static int jh7100_clk_get_phase(struct clk_hw *hw)
+{
+ struct jh7100_clk *clk = jh7100_clk_from(hw);
+ u32 value = jh7100_clk_reg_get(clk);
+
+ return (value & JH7100_CLK_INVERT) ? 180 : 0;
+}
+
+static int jh7100_clk_set_phase(struct clk_hw *hw, int degrees)
+{
+ struct jh7100_clk *clk = jh7100_clk_from(hw);
+ u32 value;
+
+ if (degrees == 0)
+ value = 0;
+ else if (degrees == 180)
+ value = JH7100_CLK_INVERT;
+ else
+ return -EINVAL;
+
+ jh7100_clk_reg_rmw(clk, JH7100_CLK_INVERT, value);
+ return 0;
+}
+
+#ifdef CONFIG_DEBUG_FS
+static void jh7100_clk_debug_init(struct clk_hw *hw, struct dentry *dentry)
+{
+ static const struct debugfs_reg32 jh7100_clk_reg = {
+ .name = "CTRL",
+ .offset = 0,
+ };
+ struct jh7100_clk *clk = jh7100_clk_from(hw);
+ struct clk_starfive_jh7100_priv *priv = jh7100_priv_from(clk);
+ struct debugfs_regset32 *regset;
+
+ regset = devm_kzalloc(priv->dev, sizeof(*regset), GFP_KERNEL);
+ if (!regset)
+ return;
+
+ regset->regs = &jh7100_clk_reg;
+ regset->nregs = 1;
+ regset->base = priv->base + 4 * clk->idx;
+
+ debugfs_create_regset32("registers", 0400, dentry, regset);
+}
+#else
+#define jh7100_clk_debug_init NULL
+#endif
+
+static const struct clk_ops jh7100_clk_gate_ops = {
+ .enable = jh7100_clk_enable,
+ .disable = jh7100_clk_disable,
+ .is_enabled = jh7100_clk_is_enabled,
+ .debug_init = jh7100_clk_debug_init,
+};
+
+static const struct clk_ops jh7100_clk_div_ops = {
+ .recalc_rate = jh7100_clk_recalc_rate,
+ .determine_rate = jh7100_clk_determine_rate,
+ .set_rate = jh7100_clk_set_rate,
+ .debug_init = jh7100_clk_debug_init,
+};
+
+static const struct clk_ops jh7100_clk_gdiv_ops = {
+ .enable = jh7100_clk_enable,
+ .disable = jh7100_clk_disable,
+ .is_enabled = jh7100_clk_is_enabled,
+ .recalc_rate = jh7100_clk_recalc_rate,
+ .determine_rate = jh7100_clk_determine_rate,
+ .set_rate = jh7100_clk_set_rate,
+ .debug_init = jh7100_clk_debug_init,
+};
+
+static const struct clk_ops jh7100_clk_mux_ops = {
+ .get_parent = jh7100_clk_get_parent,
+ .set_parent = jh7100_clk_set_parent,
+ .determine_rate = jh7100_clk_mux_determine_rate,
+ .debug_init = jh7100_clk_debug_init,
+};
+
+static const struct clk_ops jh7100_clk_gmux_ops = {
+ .enable = jh7100_clk_enable,
+ .disable = jh7100_clk_disable,
+ .is_enabled = jh7100_clk_is_enabled,
+ .get_parent = jh7100_clk_get_parent,
+ .set_parent = jh7100_clk_set_parent,
+ .determine_rate = jh7100_clk_mux_determine_rate,
+ .debug_init = jh7100_clk_debug_init,
+};
+
+static const struct clk_ops jh7100_clk_inv_ops = {
+ .get_phase = jh7100_clk_get_phase,
+ .set_phase = jh7100_clk_set_phase,
+ .debug_init = jh7100_clk_debug_init,
+};
+
+static const struct clk_ops *__init jh7100_clk_ops(u32 max)
+{
+ if (max & JH7100_CLK_DIV_MASK) {
+ if (max & JH7100_CLK_ENABLE)
+ return &jh7100_clk_gdiv_ops;
+ return &jh7100_clk_div_ops;
+ }
+
+ if (max & JH7100_CLK_MUX_MASK) {
+ if (max & JH7100_CLK_ENABLE)
+ return &jh7100_clk_gmux_ops;
+ return &jh7100_clk_mux_ops;
+ }
+
+ if (max & JH7100_CLK_ENABLE)
+ return &jh7100_clk_gate_ops;
+
+ return &jh7100_clk_inv_ops;
+}
+
+static struct clk_hw *clk_starfive_jh7100_get(struct of_phandle_args *clkspec, void *data)
+{
+ struct clk_starfive_jh7100_priv *priv = data;
+ unsigned int idx = clkspec->args[0];
+
+ if (idx < JH7100_CLK_PLL0_OUT)
+ return &priv->reg[idx].hw;
+
+ if (idx < JH7100_CLK_END)
+ return priv->pll[idx - JH7100_CLK_PLL0_OUT];
+
+ return ERR_PTR(-EINVAL);
+}
+
+static int __init clk_starfive_jh7100_probe(struct platform_device *pdev)
+{
+ struct clk_starfive_jh7100_priv *priv;
+ unsigned int idx;
+ int ret;
+
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ spin_lock_init(&priv->rmw_lock);
+ priv->dev = &pdev->dev;
+ priv->base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(priv->base))
+ return PTR_ERR(priv->base);
+
+ priv->pll[0] = devm_clk_hw_register_fixed_factor(priv->dev, "pll0_out",
+ "osc_sys", 0, 40, 1);
+ if (IS_ERR(priv->pll[0]))
+ return PTR_ERR(priv->pll[0]);
+
+ priv->pll[1] = devm_clk_hw_register_fixed_factor(priv->dev, "pll1_out",
+ "osc_sys", 0, 64, 1);
+ if (IS_ERR(priv->pll[1]))
+ return PTR_ERR(priv->pll[1]);
+
+ priv->pll[2] = devm_clk_hw_register_fixed_factor(priv->dev, "pll2_out",
+ "pll2_refclk", 0, 55, 1);
+ if (IS_ERR(priv->pll[2]))
+ return PTR_ERR(priv->pll[2]);
+
+ for (idx = 0; idx < JH7100_CLK_PLL0_OUT; idx++) {
+ u32 max = jh7100_clk_data[idx].max;
+ struct clk_parent_data parents[4] = {};
+ struct clk_init_data init = {
+ .name = jh7100_clk_data[idx].name,
+ .ops = jh7100_clk_ops(max),
+ .parent_data = parents,
+ .num_parents = ((max & JH7100_CLK_MUX_MASK) >> JH7100_CLK_MUX_SHIFT) + 1,
+ .flags = jh7100_clk_data[idx].flags,
+ };
+ struct jh7100_clk *clk = &priv->reg[idx];
+ unsigned int i;
+
+ for (i = 0; i < init.num_parents; i++) {
+ unsigned int pidx = jh7100_clk_data[idx].parents[i];
+
+ if (pidx < JH7100_CLK_PLL0_OUT)
+ parents[i].hw = &priv->reg[pidx].hw;
+ else if (pidx < JH7100_CLK_END)
+ parents[i].hw = priv->pll[pidx - JH7100_CLK_PLL0_OUT];
+ else if (pidx == JH7100_CLK_OSC_SYS)
+ parents[i].fw_name = "osc_sys";
+ else if (pidx == JH7100_CLK_OSC_AUD)
+ parents[i].fw_name = "osc_aud";
+ else if (pidx == JH7100_CLK_GMAC_RMII_REF)
+ parents[i].fw_name = "gmac_rmii_ref";
+ else if (pidx == JH7100_CLK_GMAC_GR_MII_RX)
+ parents[i].fw_name = "gmac_gr_mii_rxclk";
+ }
+
+ clk->hw.init = &init;
+ clk->idx = idx;
+ clk->max_div = max & JH7100_CLK_DIV_MASK;
+
+ ret = devm_clk_hw_register(priv->dev, &clk->hw);
+ if (ret)
+ return ret;
+ }
+
+ return devm_of_clk_add_hw_provider(priv->dev, clk_starfive_jh7100_get, priv);
+}
+
+static const struct of_device_id clk_starfive_jh7100_match[] = {
+ { .compatible = "starfive,jh7100-clkgen" },
+ { /* sentinel */ }
+};
+
+static struct platform_driver clk_starfive_jh7100_driver = {
+ .driver = {
+ .name = "clk-starfive-jh7100",
+ .of_match_table = clk_starfive_jh7100_match,
+ .suppress_bind_attrs = true,
+ },
+};
+builtin_platform_driver_probe(clk_starfive_jh7100_driver, clk_starfive_jh7100_probe);
--
2.33.1
Add bindings for the reset controller on the JH7100 RISC-V SoC by
StarFive Ltd. This is a test chip for their upcoming JH7110 SoC.
Signed-off-by: Emil Renner Berthing <[email protected]>
Reviewed-by: Geert Uytterhoeven <[email protected]>
Reviewed-by: Rob Herring <[email protected]>
---
.../bindings/reset/starfive,jh7100-reset.yaml | 38 +++++++++++++++++++
1 file changed, 38 insertions(+)
create mode 100644 Documentation/devicetree/bindings/reset/starfive,jh7100-reset.yaml
diff --git a/Documentation/devicetree/bindings/reset/starfive,jh7100-reset.yaml b/Documentation/devicetree/bindings/reset/starfive,jh7100-reset.yaml
new file mode 100644
index 000000000000..300359a5e14b
--- /dev/null
+++ b/Documentation/devicetree/bindings/reset/starfive,jh7100-reset.yaml
@@ -0,0 +1,38 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/reset/starfive,jh7100-reset.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: StarFive JH7100 SoC Reset Controller Device Tree Bindings
+
+maintainers:
+ - Emil Renner Berthing <[email protected]>
+
+properties:
+ compatible:
+ enum:
+ - starfive,jh7100-reset
+
+ reg:
+ maxItems: 1
+
+ "#reset-cells":
+ const: 1
+
+required:
+ - compatible
+ - reg
+ - "#reset-cells"
+
+additionalProperties: false
+
+examples:
+ - |
+ reset-controller@11840000 {
+ compatible = "starfive,jh7100-reset";
+ reg = <0x11840000 0x10000>;
+ #reset-cells = <1>;
+ };
+
+...
--
2.33.1
Add bindings for the GPIO/pin controller on the JH7100 RISC-V SoC by
StarFive Ltd. This is a test chip for their upcoming JH7110 SoC.
Signed-off-by: Emil Renner Berthing <[email protected]>
Reviewed-by: Linus Walleij <[email protected]>
Reviewed-by: Rob Herring <[email protected]>
---
.../pinctrl/starfive,jh7100-pinctrl.yaml | 307 ++++++++++++++++++
1 file changed, 307 insertions(+)
create mode 100644 Documentation/devicetree/bindings/pinctrl/starfive,jh7100-pinctrl.yaml
diff --git a/Documentation/devicetree/bindings/pinctrl/starfive,jh7100-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/starfive,jh7100-pinctrl.yaml
new file mode 100644
index 000000000000..92963604422f
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/starfive,jh7100-pinctrl.yaml
@@ -0,0 +1,307 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pinctrl/starfive,jh7100-pinctrl.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: StarFive JH7100 Pin Controller Device Tree Bindings
+
+description: |
+ Bindings for the JH7100 RISC-V SoC from StarFive Ltd.
+
+ Out of the SoC's many pins only the ones named PAD_GPIO[0] to PAD_GPIO[63]
+ and PAD_FUNC_SHARE[0] to PAD_FUNC_SHARE[141] can be multiplexed and have
+ configurable bias, drive strength, schmitt trigger etc. The SoC has an
+ interesting 2-layered approach to pin muxing best illustrated by the diagram
+ below.
+
+ Signal group 0, 1, ... or 6
+ ___|___
+ | |
+ LCD output -----------------| |
+ CMOS Camera interface ------| |--- PAD_GPIO[0]
+ Ethernet PHY interface -----| MUX |--- PAD_GPIO[1]
+ ... | | ...
+ | |--- PAD_GPIO[63]
+ -------- GPIO0 ------------| |
+ | -------|-- GPIO1 --------| |--- PAD_FUNC_SHARE[0]
+ | | | | | |--- PAD_FUNC_SHARE[1]
+ | | | | ... | | ...
+ | | | | | |--- PAD_FUNC_SHARE[141]
+ | | -----|---|-- GPIO63 ---| |
+ | | | | | | -------
+ UART0 UART1 --
+
+
+ The big MUX in the diagram only has 7 different ways of mapping peripherals
+ on the left to pins on the right. StarFive calls the 7 configurations "signal
+ groups".
+ However some peripherals have their I/O go through the 64 "GPIOs". The
+ diagram only shows UART0 and UART1, but this also includes a number of other
+ UARTs, I2Cs, SPIs, PWMs etc. All these peripherals are connected to all 64
+ GPIOs such that any GPIO can be set up to be controlled by any of the
+ peripherals.
+ Note that signal group 0 doesn't map any of the GPIOs to pins, and only
+ signal group 1 maps the GPIOs to the pins named PAD_GPIO[0] to PAD_GPIO[63].
+
+maintainers:
+ - Emil Renner Berthing <[email protected]>
+ - Drew Fustini <[email protected]>
+
+properties:
+ compatible:
+ const: starfive,jh7100-pinctrl
+
+ reg:
+ minItems: 2
+ maxItems: 2
+
+ reg-names:
+ items:
+ - const: gpio
+ - const: padctl
+
+ clocks:
+ maxItems: 1
+
+ resets:
+ maxItems: 1
+
+ gpio-controller: true
+
+ "#gpio-cells":
+ const: 2
+
+ interrupts:
+ maxItems: 1
+ description: The GPIO parent interrupt.
+
+ interrupt-controller: true
+
+ "#interrupt-cells":
+ const: 2
+
+ starfive,signal-group:
+ description: |
+ Select one of the 7 signal groups. If this property is not set it
+ defaults to the configuration already chosen by the earlier boot stages.
+ $ref: /schemas/types.yaml#/definitions/uint32
+ enum: [0, 1, 2, 3, 4, 5, 6]
+
+required:
+ - compatible
+ - reg
+ - reg-names
+ - clocks
+ - gpio-controller
+ - "#gpio-cells"
+ - interrupts
+ - interrupt-controller
+ - "#interrupt-cells"
+
+patternProperties:
+ '-[0-9]+$':
+ type: object
+ patternProperties:
+ '-pins$':
+ type: object
+ description: |
+ A pinctrl node should contain at least one subnode representing the
+ pinctrl groups available on the machine. Each subnode will list the
+ pins it needs, and how they should be configured, with regard to
+ muxer configuration, bias, input enable/disable, input schmitt
+ trigger enable/disable, slew-rate and drive strength.
+ $ref: "/schemas/pinctrl/pincfg-node.yaml"
+
+ properties:
+ pins:
+ description: |
+ The list of pin identifiers that properties in the node apply to.
+ This should be set using either the PAD_GPIO or PAD_FUNC_SHARE
+ macros.
+ Either this or "pinmux" has to be specified, but not both.
+ $ref: "/schemas/pinctrl/pinmux-node.yaml#/properties/pins"
+
+ pinmux:
+ description: |
+ The list of GPIOs and their mux settings that properties in the
+ node apply to. This should be set using the GPIOMUX macro.
+ Either this or "pins" has to be specified, but not both.
+ $ref: "/schemas/pinctrl/pinmux-node.yaml#/properties/pinmux"
+
+ bias-disable: true
+
+ bias-pull-up:
+ type: boolean
+
+ bias-pull-down:
+ type: boolean
+
+ drive-strength:
+ enum: [ 14, 21, 28, 35, 42, 49, 56, 63 ]
+
+ input-enable: true
+
+ input-disable: true
+
+ input-schmitt-enable: true
+
+ input-schmitt-disable: true
+
+ slew-rate:
+ maximum: 7
+
+ starfive,strong-pull-up:
+ description: enable strong pull-up.
+ type: boolean
+
+ additionalProperties: false
+
+ additionalProperties: false
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/clock/starfive-jh7100.h>
+ #include <dt-bindings/reset/starfive-jh7100.h>
+ #include <dt-bindings/pinctrl/pinctrl-starfive.h>
+
+ soc {
+ #address-cells = <2>;
+ #size-cells = <2>;
+
+ pinctrl@11910000 {
+ compatible = "starfive,jh7100-pinctrl";
+ reg = <0x0 0x11910000 0x0 0x10000>,
+ <0x0 0x11858000 0x0 0x1000>;
+ reg-names = "gpio", "padctl";
+ clocks = <&clkgen JH7100_CLK_GPIO_APB>;
+ resets = <&clkgen JH7100_RSTN_GPIO_APB>;
+ interrupts = <32>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ starfive,signal-group = <6>;
+
+ gmac_pins_default: gmac-0 {
+ gtxclk-pins {
+ pins = <PAD_FUNC_SHARE(115)>;
+ bias-pull-up;
+ drive-strength = <35>;
+ input-enable;
+ input-schmitt-enable;
+ slew-rate = <0>;
+ };
+ miitxclk-pins {
+ pins = <PAD_FUNC_SHARE(116)>;
+ bias-pull-up;
+ drive-strength = <14>;
+ input-enable;
+ input-schmitt-disable;
+ slew-rate = <0>;
+ };
+ tx-pins {
+ pins = <PAD_FUNC_SHARE(117)>,
+ <PAD_FUNC_SHARE(119)>,
+ <PAD_FUNC_SHARE(120)>,
+ <PAD_FUNC_SHARE(121)>,
+ <PAD_FUNC_SHARE(122)>,
+ <PAD_FUNC_SHARE(123)>,
+ <PAD_FUNC_SHARE(124)>,
+ <PAD_FUNC_SHARE(125)>,
+ <PAD_FUNC_SHARE(126)>;
+ bias-disable;
+ drive-strength = <35>;
+ input-disable;
+ input-schmitt-disable;
+ slew-rate = <0>;
+ };
+ rxclk-pins {
+ pins = <PAD_FUNC_SHARE(127)>;
+ bias-pull-up;
+ drive-strength = <14>;
+ input-enable;
+ input-schmitt-disable;
+ slew-rate = <6>;
+ };
+ rxer-pins {
+ pins = <PAD_FUNC_SHARE(129)>;
+ bias-pull-up;
+ drive-strength = <14>;
+ input-enable;
+ input-schmitt-disable;
+ slew-rate = <0>;
+ };
+ rx-pins {
+ pins = <PAD_FUNC_SHARE(128)>,
+ <PAD_FUNC_SHARE(130)>,
+ <PAD_FUNC_SHARE(131)>,
+ <PAD_FUNC_SHARE(132)>,
+ <PAD_FUNC_SHARE(133)>,
+ <PAD_FUNC_SHARE(134)>,
+ <PAD_FUNC_SHARE(135)>,
+ <PAD_FUNC_SHARE(136)>,
+ <PAD_FUNC_SHARE(137)>,
+ <PAD_FUNC_SHARE(138)>,
+ <PAD_FUNC_SHARE(139)>,
+ <PAD_FUNC_SHARE(140)>,
+ <PAD_FUNC_SHARE(141)>;
+ bias-pull-up;
+ drive-strength = <14>;
+ input-enable;
+ input-schmitt-enable;
+ slew-rate = <0>;
+ };
+ };
+
+ i2c0_pins_default: i2c0-0 {
+ i2c-pins {
+ pinmux = <GPIOMUX(62, GPO_LOW,
+ GPO_I2C0_PAD_SCK_OEN,
+ GPI_I2C0_PAD_SCK_IN)>,
+ <GPIOMUX(61, GPO_LOW,
+ GPO_I2C0_PAD_SDA_OEN,
+ GPI_I2C0_PAD_SDA_IN)>;
+ bias-disable; /* external pull-up */
+ input-enable;
+ input-schmitt-enable;
+ };
+ };
+
+ uart3_pins_default: uart3-0 {
+ rx-pins {
+ pinmux = <GPIOMUX(13, GPO_LOW, GPO_DISABLE,
+ GPI_UART3_PAD_SIN)>;
+ bias-pull-up;
+ input-enable;
+ input-schmitt-enable;
+ };
+ tx-pins {
+ pinmux = <GPIOMUX(14, GPO_UART3_PAD_SOUT,
+ GPO_ENABLE, GPI_NONE)>;
+ bias-disable;
+ input-disable;
+ input-schmitt-disable;
+ };
+ };
+ };
+
+ gmac {
+ pinctrl-0 = <&gmac_pins_default>;
+ pinctrl-names = "default";
+ };
+
+ i2c0 {
+ pinctrl-0 = <&i2c0_pins_default>;
+ pinctrl-names = "default";
+ };
+
+ uart3 {
+ pinctrl-0 = <&uart3_pins_default>;
+ pinctrl-names = "default";
+ };
+ };
+
+...
--
2.33.1
Add a combined pinctrl and GPIO driver for the JH7100 RISC-V SoC by
StarFive Ltd. This is a test chip for their upcoming JH7110 SoC, which
is said to feature only minor changes to these pinctrl/GPIO parts.
For each "GPIO" there are two registers for configuring the output and
output enable signals which may come from other peripherals. Among these
are two special signals that are constant 0 and constant 1 respectively.
Controlling the GPIOs from software is done by choosing one of these
signals. In other words the same registers are used for both pin muxing
and controlling the GPIOs, which makes it easier to combine the pinctrl
and GPIO driver in one.
I wrote the pinconf and pinmux parts, but the GPIO part of the code is
based on the GPIO driver in the vendor tree written by Huan Feng with
cleanups and fixes by Drew and me.
Datasheet: https://github.com/starfive-tech/JH7100_Docs/blob/main/JH7100%20Data%20Sheet%20V01.01.04-EN%20(4-21-2021).pdf
Co-developed-by: Huan Feng <[email protected]>
Signed-off-by: Huan Feng <[email protected]>
Signed-off-by: Emil Renner Berthing <[email protected]>
Co-developed-by: Drew Fustini <[email protected]>
Signed-off-by: Drew Fustini <[email protected]>
---
MAINTAINERS | 8 +
drivers/pinctrl/Kconfig | 17 +
drivers/pinctrl/Makefile | 1 +
drivers/pinctrl/pinctrl-starfive.c | 1354 ++++++++++++++++++++++++++++
4 files changed, 1380 insertions(+)
create mode 100644 drivers/pinctrl/pinctrl-starfive.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 1152f5d94690..30d6842969e7 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -18137,6 +18137,14 @@ F: Documentation/devicetree/bindings/clock/starfive,jh7100-clkgen.yaml
F: drivers/clk/starfive/clk-starfive-jh7100.c
F: include/dt-bindings/clock/starfive-jh7100.h
+STARFIVE JH7100 PINCTRL DRIVER
+M: Emil Renner Berthing <[email protected]>
+L: [email protected]
+S: Maintained
+F: Documentation/devicetree/bindings/pinctrl/starfive,jh7100-pinctrl.yaml
+F: drivers/pinctrl/pinctrl-starfive.c
+F: include/dt-bindings/pinctrl/pinctrl-starfive.h
+
STARFIVE JH7100 RESET CONTROLLER DRIVER
M: Emil Renner Berthing <[email protected]>
S: Maintained
diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index 6a961d5f8726..0d5b61e4c21e 100644
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -281,6 +281,23 @@ config PINCTRL_ST
select PINCONF
select GPIOLIB_IRQCHIP
+config PINCTRL_STARFIVE
+ tristate "Pinctrl and GPIO driver for the StarFive JH7100 SoC"
+ depends on SOC_STARFIVE || COMPILE_TEST
+ depends on OF
+ default SOC_STARFIVE
+ select GENERIC_PINCTRL_GROUPS
+ select GENERIC_PINMUX_FUNCTIONS
+ select GENERIC_PINCONF
+ select GPIOLIB
+ select GPIOLIB_IRQCHIP
+ select OF_GPIO
+ help
+ Say yes here to support pin control on the StarFive JH7100 SoC.
+ This also provides an interface to the GPIO pins not used by other
+ peripherals supporting inputs, outputs, configuring pull-up/pull-down
+ and interrupts on input changes.
+
config PINCTRL_STMFX
tristate "STMicroelectronics STMFX GPIO expander pinctrl driver"
depends on I2C
diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
index 5e63de2ffcf4..f5bdd6b209a6 100644
--- a/drivers/pinctrl/Makefile
+++ b/drivers/pinctrl/Makefile
@@ -39,6 +39,7 @@ obj-$(CONFIG_PINCTRL_LANTIQ) += pinctrl-lantiq.o
obj-$(CONFIG_PINCTRL_LPC18XX) += pinctrl-lpc18xx.o
obj-$(CONFIG_PINCTRL_TB10X) += pinctrl-tb10x.o
obj-$(CONFIG_PINCTRL_ST) += pinctrl-st.o
+obj-$(CONFIG_PINCTRL_STARFIVE) += pinctrl-starfive.o
obj-$(CONFIG_PINCTRL_STMFX) += pinctrl-stmfx.o
obj-$(CONFIG_PINCTRL_ZYNQ) += pinctrl-zynq.o
obj-$(CONFIG_PINCTRL_ZYNQMP) += pinctrl-zynqmp.o
diff --git a/drivers/pinctrl/pinctrl-starfive.c b/drivers/pinctrl/pinctrl-starfive.c
new file mode 100644
index 000000000000..0b912152a405
--- /dev/null
+++ b/drivers/pinctrl/pinctrl-starfive.c
@@ -0,0 +1,1354 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Pinctrl / GPIO driver for StarFive JH7100 SoC
+ *
+ * Copyright (C) 2020 Shanghai StarFive Technology Co., Ltd.
+ * Copyright (C) 2021 Emil Renner Berthing <[email protected]>
+ */
+
+#include <linux/bits.h>
+#include <linux/clk.h>
+#include <linux/gpio/driver.h>
+#include <linux/io.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/reset.h>
+#include <linux/spinlock.h>
+
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+
+#include <dt-bindings/pinctrl/pinctrl-starfive.h>
+
+#include "core.h"
+#include "pinctrl-utils.h"
+#include "pinmux.h"
+#include "pinconf.h"
+
+#define DRIVER_NAME "pinctrl-starfive"
+
+/*
+ * Refer to Section 12. GPIO Registers in the JH7100 data sheet:
+ * https://github.com/starfive-tech/JH7100_Docs
+ */
+#define NR_GPIOS 64
+
+/*
+ * Global enable for GPIO interrupts. If bit 0 is set to 1 the GPIO interrupts
+ * are enabled. If set to 0 the GPIO interrupts are disabled.
+ */
+#define GPIOEN 0x000
+
+/*
+ * The following 32-bit registers come in pairs, but only the offset of the
+ * first register is defined. The first controls (interrupts for) GPIO 0-31 and
+ * the second GPIO 32-63.
+ */
+
+/*
+ * Interrupt Type. If set to 1 the interrupt is edge-triggered. If set to 0 the
+ * interrupt is level-triggered.
+ */
+#define GPIOIS 0x010
+
+/*
+ * Edge-Trigger Interrupt Type. If set to 1 the interrupt gets triggered on
+ * both positive and negative edges. If set to 0 the interrupt is triggered by a
+ * single edge.
+ */
+#define GPIOIBE 0x018
+
+/*
+ * Interrupt Trigger Polarity. If set to 1 the interrupt is triggered on a
+ * rising edge (edge-triggered) or high level (level-triggered). If set to 0 the
+ * interrupt is triggered on a falling edge (edge-triggered) or low level
+ * (level-triggered).
+ */
+#define GPIOIEV 0x020
+
+/*
+ * Interrupt Mask. If set to 1 the interrupt is enabled (unmasked). If set to 0
+ * the interrupt is disabled (masked). Note that the current documentation is
+ * wrong and says the exct opposite of this.
+ */
+#define GPIOIE 0x028
+
+/*
+ * Clear Edge-Triggered Interrupts. Write a 1 to clear the edge-triggered
+ * interrupt.
+ */
+#define GPIOIC 0x030
+
+/*
+ * Edge-Triggered Interrupt Status. A 1 means the configured edge was detected.
+ */
+#define GPIORIS 0x038
+
+/*
+ * Interrupt Status after Masking. A 1 means the configured edge or level was
+ * detected and not masked.
+ */
+#define GPIOMIS 0x040
+
+/*
+ * Data Value. Dynamically reflects the value of the GPIO pin. If 1 the pin is
+ * a digital 1 and if 0 the pin is a digital 0.
+ */
+#define GPIODIN 0x048
+
+/*
+ * From the data sheet section 12.2, there are 64 32-bit output data registers
+ * and 64 output enable registers. Output data and output enable registers for
+ * a given GPIO are contiguous. Eg. GPO0_DOUT_CFG is 0x50 and GPO0_DOEN_CFG is
+ * 0x54 while GPO1_DOUT_CFG is 0x58 and GPO1_DOEN_CFG is 0x5c. The stride
+ * between GPIO registers is effectively 8, thus: GPOn_DOUT_CFG is 0x50 + 8n
+ * and GPOn_DOEN_CFG is 0x54 + 8n.
+ */
+#define GPON_DOUT_CFG 0x050
+#define GPON_DOEN_CFG 0x054
+
+/*
+ * From Section 12.3, there are 75 input signal configuration registers which
+ * are 4 bytes wide starting with GPI_CPU_JTAG_TCK_CFG at 0x250 and ending with
+ * GPI_USB_OVER_CURRENT_CFG 0x378
+ */
+#define GPI_CFG_OFFSET 0x250
+
+/*
+ * Pad Control Bits. There are 16 pad control bits for each pin located in 103
+ * 32-bit registers controlling PAD_GPIO[0] to PAD_GPIO[63] followed by
+ * PAD_FUNC_SHARE[0] to PAD_FUNC_SHARE[141]. Odd numbered pins use the upper 16
+ * bit of each register.
+ */
+#define PAD_SLEW_RATE_MASK GENMASK(11, 9)
+#define PAD_SLEW_RATE_POS 9
+#define PAD_BIAS_STRONG_PULL_UP BIT(8)
+#define PAD_INPUT_ENABLE BIT(7)
+#define PAD_INPUT_SCHMITT_ENABLE BIT(6)
+#define PAD_BIAS_DISABLE BIT(5)
+#define PAD_BIAS_PULL_DOWN BIT(4)
+#define PAD_BIAS_MASK \
+ (PAD_BIAS_STRONG_PULL_UP | \
+ PAD_BIAS_DISABLE | \
+ PAD_BIAS_PULL_DOWN)
+#define PAD_DRIVE_STRENGTH_MASK GENMASK(3, 0)
+#define PAD_DRIVE_STRENGTH_POS 0
+
+/*
+ * From Section 11, the IO_PADSHARE_SEL register can be programmed to select
+ * one of seven pre-defined multiplexed signal groups on PAD_FUNC_SHARE and
+ * PAD_GPIO pads. This is a global setting.
+ */
+#define IO_PADSHARE_SEL 0x1a0
+
+/*
+ * This just needs to be some number such that when
+ * sfp->gpio.pin_base = PAD_INVALID_GPIO then
+ * starfive_pin_to_gpio(sfp, validpin) is never a valid GPIO number.
+ * That is it should underflow and return something >= NR_GPIOS.
+ */
+#define PAD_INVALID_GPIO 0x10000
+
+/*
+ * The packed pinmux values from the device tree look like this:
+ *
+ * | 31 - 24 | 23 - 16 | 15 - 8 | 7 | 6 | 5 - 0 |
+ * | dout | doen | din | dout rev | doen rev | gpio nr |
+ *
+ * ..but the GPOn_DOUT_CFG and GPOn_DOEN_CFG registers look like this:
+ *
+ * | 31 | 30 - 8 | 7 - 0 |
+ * | dout/doen rev | unused | dout/doen |
+ */
+static unsigned int starfive_pinmux_to_gpio(u32 v)
+{
+ return v & (NR_GPIOS - 1);
+}
+
+static u32 starfive_pinmux_to_dout(u32 v)
+{
+ return ((v & BIT(7)) << (31 - 7)) | ((v >> 24) & GENMASK(7, 0));
+}
+
+static u32 starfive_pinmux_to_doen(u32 v)
+{
+ return ((v & BIT(6)) << (31 - 6)) | ((v >> 16) & GENMASK(7, 0));
+}
+
+static u32 starfive_pinmux_to_din(u32 v)
+{
+ return (v >> 8) & GENMASK(7, 0);
+}
+
+/*
+ * The maximum GPIO output current depends on the chosen drive strength:
+ *
+ * DS: 0 1 2 3 4 5 6 7
+ * mA: 14.2 21.2 28.2 35.2 42.2 49.1 56.0 62.8
+ *
+ * After rounding that is 7*DS + 14 mA
+ */
+static u32 starfive_drive_strength_to_max_mA(u16 ds)
+{
+ return 7 * ds + 14;
+}
+
+static u16 starfive_drive_strength_from_max_mA(u32 i)
+{
+ return (clamp(i, 14U, 63U) - 14) / 7;
+}
+
+struct starfive_pinctrl {
+ struct gpio_chip gc;
+ struct pinctrl_gpio_range gpios;
+ raw_spinlock_t lock;
+ void __iomem *base;
+ void __iomem *padctl;
+ struct pinctrl_dev *pctl;
+};
+
+static inline unsigned int starfive_pin_to_gpio(const struct starfive_pinctrl *sfp,
+ unsigned int pin)
+{
+ return pin - sfp->gpios.pin_base;
+}
+
+static inline unsigned int starfive_gpio_to_pin(const struct starfive_pinctrl *sfp,
+ unsigned int gpio)
+{
+ return sfp->gpios.pin_base + gpio;
+}
+
+static struct starfive_pinctrl *starfive_from_irq_data(struct irq_data *d)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+
+ return container_of(gc, struct starfive_pinctrl, gc);
+}
+
+static struct starfive_pinctrl *starfive_from_irq_desc(struct irq_desc *desc)
+{
+ struct gpio_chip *gc = irq_desc_get_handler_data(desc);
+
+ return container_of(gc, struct starfive_pinctrl, gc);
+}
+
+static const struct pinctrl_pin_desc starfive_pins[] = {
+ PINCTRL_PIN(PAD_GPIO(0), "GPIO[0]"),
+ PINCTRL_PIN(PAD_GPIO(1), "GPIO[1]"),
+ PINCTRL_PIN(PAD_GPIO(2), "GPIO[2]"),
+ PINCTRL_PIN(PAD_GPIO(3), "GPIO[3]"),
+ PINCTRL_PIN(PAD_GPIO(4), "GPIO[4]"),
+ PINCTRL_PIN(PAD_GPIO(5), "GPIO[5]"),
+ PINCTRL_PIN(PAD_GPIO(6), "GPIO[6]"),
+ PINCTRL_PIN(PAD_GPIO(7), "GPIO[7]"),
+ PINCTRL_PIN(PAD_GPIO(8), "GPIO[8]"),
+ PINCTRL_PIN(PAD_GPIO(9), "GPIO[9]"),
+ PINCTRL_PIN(PAD_GPIO(10), "GPIO[10]"),
+ PINCTRL_PIN(PAD_GPIO(11), "GPIO[11]"),
+ PINCTRL_PIN(PAD_GPIO(12), "GPIO[12]"),
+ PINCTRL_PIN(PAD_GPIO(13), "GPIO[13]"),
+ PINCTRL_PIN(PAD_GPIO(14), "GPIO[14]"),
+ PINCTRL_PIN(PAD_GPIO(15), "GPIO[15]"),
+ PINCTRL_PIN(PAD_GPIO(16), "GPIO[16]"),
+ PINCTRL_PIN(PAD_GPIO(17), "GPIO[17]"),
+ PINCTRL_PIN(PAD_GPIO(18), "GPIO[18]"),
+ PINCTRL_PIN(PAD_GPIO(19), "GPIO[19]"),
+ PINCTRL_PIN(PAD_GPIO(20), "GPIO[20]"),
+ PINCTRL_PIN(PAD_GPIO(21), "GPIO[21]"),
+ PINCTRL_PIN(PAD_GPIO(22), "GPIO[22]"),
+ PINCTRL_PIN(PAD_GPIO(23), "GPIO[23]"),
+ PINCTRL_PIN(PAD_GPIO(24), "GPIO[24]"),
+ PINCTRL_PIN(PAD_GPIO(25), "GPIO[25]"),
+ PINCTRL_PIN(PAD_GPIO(26), "GPIO[26]"),
+ PINCTRL_PIN(PAD_GPIO(27), "GPIO[27]"),
+ PINCTRL_PIN(PAD_GPIO(28), "GPIO[28]"),
+ PINCTRL_PIN(PAD_GPIO(29), "GPIO[29]"),
+ PINCTRL_PIN(PAD_GPIO(30), "GPIO[30]"),
+ PINCTRL_PIN(PAD_GPIO(31), "GPIO[31]"),
+ PINCTRL_PIN(PAD_GPIO(32), "GPIO[32]"),
+ PINCTRL_PIN(PAD_GPIO(33), "GPIO[33]"),
+ PINCTRL_PIN(PAD_GPIO(34), "GPIO[34]"),
+ PINCTRL_PIN(PAD_GPIO(35), "GPIO[35]"),
+ PINCTRL_PIN(PAD_GPIO(36), "GPIO[36]"),
+ PINCTRL_PIN(PAD_GPIO(37), "GPIO[37]"),
+ PINCTRL_PIN(PAD_GPIO(38), "GPIO[38]"),
+ PINCTRL_PIN(PAD_GPIO(39), "GPIO[39]"),
+ PINCTRL_PIN(PAD_GPIO(40), "GPIO[40]"),
+ PINCTRL_PIN(PAD_GPIO(41), "GPIO[41]"),
+ PINCTRL_PIN(PAD_GPIO(42), "GPIO[42]"),
+ PINCTRL_PIN(PAD_GPIO(43), "GPIO[43]"),
+ PINCTRL_PIN(PAD_GPIO(44), "GPIO[44]"),
+ PINCTRL_PIN(PAD_GPIO(45), "GPIO[45]"),
+ PINCTRL_PIN(PAD_GPIO(46), "GPIO[46]"),
+ PINCTRL_PIN(PAD_GPIO(47), "GPIO[47]"),
+ PINCTRL_PIN(PAD_GPIO(48), "GPIO[48]"),
+ PINCTRL_PIN(PAD_GPIO(49), "GPIO[49]"),
+ PINCTRL_PIN(PAD_GPIO(50), "GPIO[50]"),
+ PINCTRL_PIN(PAD_GPIO(51), "GPIO[51]"),
+ PINCTRL_PIN(PAD_GPIO(52), "GPIO[52]"),
+ PINCTRL_PIN(PAD_GPIO(53), "GPIO[53]"),
+ PINCTRL_PIN(PAD_GPIO(54), "GPIO[54]"),
+ PINCTRL_PIN(PAD_GPIO(55), "GPIO[55]"),
+ PINCTRL_PIN(PAD_GPIO(56), "GPIO[56]"),
+ PINCTRL_PIN(PAD_GPIO(57), "GPIO[57]"),
+ PINCTRL_PIN(PAD_GPIO(58), "GPIO[58]"),
+ PINCTRL_PIN(PAD_GPIO(59), "GPIO[59]"),
+ PINCTRL_PIN(PAD_GPIO(60), "GPIO[60]"),
+ PINCTRL_PIN(PAD_GPIO(61), "GPIO[61]"),
+ PINCTRL_PIN(PAD_GPIO(62), "GPIO[62]"),
+ PINCTRL_PIN(PAD_GPIO(63), "GPIO[63]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(0), "FUNC_SHARE[0]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(1), "FUNC_SHARE[1]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(2), "FUNC_SHARE[2]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(3), "FUNC_SHARE[3]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(4), "FUNC_SHARE[4]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(5), "FUNC_SHARE[5]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(6), "FUNC_SHARE[6]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(7), "FUNC_SHARE[7]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(8), "FUNC_SHARE[8]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(9), "FUNC_SHARE[9]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(10), "FUNC_SHARE[10]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(11), "FUNC_SHARE[11]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(12), "FUNC_SHARE[12]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(13), "FUNC_SHARE[13]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(14), "FUNC_SHARE[14]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(15), "FUNC_SHARE[15]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(16), "FUNC_SHARE[16]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(17), "FUNC_SHARE[17]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(18), "FUNC_SHARE[18]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(19), "FUNC_SHARE[19]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(20), "FUNC_SHARE[20]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(21), "FUNC_SHARE[21]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(22), "FUNC_SHARE[22]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(23), "FUNC_SHARE[23]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(24), "FUNC_SHARE[24]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(25), "FUNC_SHARE[25]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(26), "FUNC_SHARE[26]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(27), "FUNC_SHARE[27]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(28), "FUNC_SHARE[28]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(29), "FUNC_SHARE[29]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(30), "FUNC_SHARE[30]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(31), "FUNC_SHARE[31]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(32), "FUNC_SHARE[32]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(33), "FUNC_SHARE[33]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(34), "FUNC_SHARE[34]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(35), "FUNC_SHARE[35]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(36), "FUNC_SHARE[36]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(37), "FUNC_SHARE[37]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(38), "FUNC_SHARE[38]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(39), "FUNC_SHARE[39]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(40), "FUNC_SHARE[40]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(41), "FUNC_SHARE[41]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(42), "FUNC_SHARE[42]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(43), "FUNC_SHARE[43]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(44), "FUNC_SHARE[44]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(45), "FUNC_SHARE[45]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(46), "FUNC_SHARE[46]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(47), "FUNC_SHARE[47]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(48), "FUNC_SHARE[48]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(49), "FUNC_SHARE[49]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(50), "FUNC_SHARE[50]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(51), "FUNC_SHARE[51]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(52), "FUNC_SHARE[52]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(53), "FUNC_SHARE[53]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(54), "FUNC_SHARE[54]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(55), "FUNC_SHARE[55]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(56), "FUNC_SHARE[56]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(57), "FUNC_SHARE[57]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(58), "FUNC_SHARE[58]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(59), "FUNC_SHARE[59]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(60), "FUNC_SHARE[60]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(61), "FUNC_SHARE[61]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(62), "FUNC_SHARE[62]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(63), "FUNC_SHARE[63]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(64), "FUNC_SHARE[64]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(65), "FUNC_SHARE[65]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(66), "FUNC_SHARE[66]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(67), "FUNC_SHARE[67]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(68), "FUNC_SHARE[68]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(69), "FUNC_SHARE[69]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(70), "FUNC_SHARE[70]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(71), "FUNC_SHARE[71]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(72), "FUNC_SHARE[72]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(73), "FUNC_SHARE[73]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(74), "FUNC_SHARE[74]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(75), "FUNC_SHARE[75]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(76), "FUNC_SHARE[76]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(77), "FUNC_SHARE[77]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(78), "FUNC_SHARE[78]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(79), "FUNC_SHARE[79]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(80), "FUNC_SHARE[80]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(81), "FUNC_SHARE[81]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(82), "FUNC_SHARE[82]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(83), "FUNC_SHARE[83]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(84), "FUNC_SHARE[84]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(85), "FUNC_SHARE[85]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(86), "FUNC_SHARE[86]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(87), "FUNC_SHARE[87]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(88), "FUNC_SHARE[88]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(89), "FUNC_SHARE[89]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(90), "FUNC_SHARE[90]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(91), "FUNC_SHARE[91]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(92), "FUNC_SHARE[92]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(93), "FUNC_SHARE[93]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(94), "FUNC_SHARE[94]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(95), "FUNC_SHARE[95]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(96), "FUNC_SHARE[96]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(97), "FUNC_SHARE[97]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(98), "FUNC_SHARE[98]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(99), "FUNC_SHARE[99]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(100), "FUNC_SHARE[100]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(101), "FUNC_SHARE[101]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(102), "FUNC_SHARE[102]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(103), "FUNC_SHARE[103]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(104), "FUNC_SHARE[104]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(105), "FUNC_SHARE[105]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(106), "FUNC_SHARE[106]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(107), "FUNC_SHARE[107]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(108), "FUNC_SHARE[108]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(109), "FUNC_SHARE[109]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(110), "FUNC_SHARE[110]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(111), "FUNC_SHARE[111]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(112), "FUNC_SHARE[112]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(113), "FUNC_SHARE[113]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(114), "FUNC_SHARE[114]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(115), "FUNC_SHARE[115]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(116), "FUNC_SHARE[116]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(117), "FUNC_SHARE[117]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(118), "FUNC_SHARE[118]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(119), "FUNC_SHARE[119]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(120), "FUNC_SHARE[120]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(121), "FUNC_SHARE[121]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(122), "FUNC_SHARE[122]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(123), "FUNC_SHARE[123]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(124), "FUNC_SHARE[124]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(125), "FUNC_SHARE[125]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(126), "FUNC_SHARE[126]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(127), "FUNC_SHARE[127]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(128), "FUNC_SHARE[128]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(129), "FUNC_SHARE[129]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(130), "FUNC_SHARE[130]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(131), "FUNC_SHARE[131]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(132), "FUNC_SHARE[132]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(133), "FUNC_SHARE[133]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(134), "FUNC_SHARE[134]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(135), "FUNC_SHARE[135]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(136), "FUNC_SHARE[136]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(137), "FUNC_SHARE[137]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(138), "FUNC_SHARE[138]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(139), "FUNC_SHARE[139]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(140), "FUNC_SHARE[140]"),
+ PINCTRL_PIN(PAD_FUNC_SHARE(141), "FUNC_SHARE[141]"),
+};
+
+#ifdef CONFIG_DEBUG_FS
+static void starfive_pin_dbg_show(struct pinctrl_dev *pctldev,
+ struct seq_file *s,
+ unsigned int pin)
+{
+ struct starfive_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev);
+ unsigned int gpio = starfive_pin_to_gpio(sfp, pin);
+ void __iomem *reg;
+ u32 dout, doen;
+
+ if (gpio >= NR_GPIOS)
+ return;
+
+ reg = sfp->base + GPON_DOUT_CFG + 8 * gpio;
+ dout = readl_relaxed(reg + 0x000);
+ doen = readl_relaxed(reg + 0x004);
+
+ seq_printf(s, "dout=%lu%s doen=%lu%s",
+ dout & GENMASK(7, 0), (dout & BIT(31)) ? "r" : "",
+ doen & GENMASK(7, 0), (doen & BIT(31)) ? "r" : "");
+}
+#else
+#define starfive_pin_dbg_show NULL
+#endif
+
+static int starfive_dt_node_to_map(struct pinctrl_dev *pctldev,
+ struct device_node *np,
+ struct pinctrl_map **maps,
+ unsigned int *num_maps)
+{
+ struct starfive_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev);
+ struct device *dev = sfp->gc.parent;
+ struct device_node *child;
+ struct pinctrl_map *map;
+ const char **pgnames;
+ const char *grpname;
+ u32 *pinmux;
+ int ngroups;
+ int *pins;
+ int nmaps;
+ int ret;
+
+ nmaps = 0;
+ ngroups = 0;
+ for_each_child_of_node(np, child) {
+ int npinmux = of_property_count_u32_elems(child, "pinmux");
+ int npins = of_property_count_u32_elems(child, "pins");
+
+ if (npinmux > 0 && npins > 0) {
+ dev_err(dev, "invalid pinctrl group %pOFn.%pOFn: both pinmux and pins set\n",
+ np, child);
+ of_node_put(child);
+ return -EINVAL;
+ }
+ if (npinmux == 0 && npins == 0) {
+ dev_err(dev, "invalid pinctrl group %pOFn.%pOFn: neither pinmux nor pins set\n",
+ np, child);
+ of_node_put(child);
+ return -EINVAL;
+ }
+
+ if (npinmux > 0)
+ nmaps += 2;
+ else
+ nmaps += 1;
+ ngroups += 1;
+ }
+
+ pgnames = devm_kcalloc(dev, ngroups, sizeof(*pgnames), GFP_KERNEL);
+ if (!pgnames)
+ return -ENOMEM;
+
+ map = kcalloc(nmaps, sizeof(*map), GFP_KERNEL);
+ if (!map)
+ return -ENOMEM;
+
+ nmaps = 0;
+ ngroups = 0;
+ for_each_child_of_node(np, child) {
+ int npins;
+ int i;
+
+ grpname = devm_kasprintf(dev, GFP_KERNEL, "%pOFn.%pOFn", np, child);
+ if (!grpname) {
+ ret = -ENOMEM;
+ goto put_child;
+ }
+
+ pgnames[ngroups++] = grpname;
+
+ if ((npins = of_property_count_u32_elems(child, "pinmux")) > 0) {
+ pins = devm_kcalloc(dev, npins, sizeof(*pins), GFP_KERNEL);
+ if (!pins) {
+ ret = -ENOMEM;
+ goto put_child;
+ }
+
+ pinmux = devm_kcalloc(dev, npins, sizeof(*pinmux), GFP_KERNEL);
+ if (!pinmux) {
+ ret = -ENOMEM;
+ goto put_child;
+ }
+
+ ret = of_property_read_u32_array(child, "pinmux", pinmux, npins);
+ if (ret)
+ goto put_child;
+
+ for (i = 0; i < npins; i++) {
+ unsigned int gpio = starfive_pinmux_to_gpio(pinmux[i]);
+
+ pins[i] = starfive_gpio_to_pin(sfp, gpio);
+ }
+
+ map[nmaps].type = PIN_MAP_TYPE_MUX_GROUP;
+ map[nmaps].data.mux.function = np->name;
+ map[nmaps].data.mux.group = grpname;
+ nmaps += 1;
+ } else if ((npins = of_property_count_u32_elems(child, "pins")) > 0) {
+ pins = devm_kcalloc(dev, npins, sizeof(*pins), GFP_KERNEL);
+ if (!pins) {
+ ret = -ENOMEM;
+ goto put_child;
+ }
+
+ pinmux = NULL;
+
+ for (i = 0; i < npins; i++) {
+ u32 v;
+
+ ret = of_property_read_u32_index(child, "pins", i, &v);
+ if (ret)
+ goto put_child;
+ pins[i] = v;
+ }
+ } else {
+ ret = -EINVAL;
+ goto put_child;
+ }
+
+ ret = pinctrl_generic_add_group(pctldev, grpname, pins, npins, pinmux);
+ if (ret < 0) {
+ dev_err(dev, "error adding group %s: %d\n", grpname, ret);
+ goto put_child;
+ }
+
+ ret = pinconf_generic_parse_dt_config(child, pctldev,
+ &map[nmaps].data.configs.configs,
+ &map[nmaps].data.configs.num_configs);
+ if (ret) {
+ dev_err(dev, "error parsing pin config of group %s: %d\n",
+ grpname, ret);
+ goto put_child;
+ }
+
+ /* don't create a map if there are no pinconf settings */
+ if (map[nmaps].data.configs.num_configs == 0)
+ continue;
+
+ map[nmaps].type = PIN_MAP_TYPE_CONFIGS_GROUP;
+ map[nmaps].data.configs.group_or_pin = grpname;
+ nmaps += 1;
+ }
+
+ ret = pinmux_generic_add_function(pctldev, np->name, pgnames, ngroups, NULL);
+ if (ret < 0) {
+ dev_err(dev, "error adding function %s: %d\n", np->name, ret);
+ goto free_map;
+ }
+
+ *maps = map;
+ *num_maps = nmaps;
+ return 0;
+
+put_child:
+ of_node_put(child);
+free_map:
+ pinctrl_utils_free_map(pctldev, map, nmaps);
+ return ret;
+}
+
+static const struct pinctrl_ops starfive_pinctrl_ops = {
+ .get_groups_count = pinctrl_generic_get_group_count,
+ .get_group_name = pinctrl_generic_get_group_name,
+ .get_group_pins = pinctrl_generic_get_group_pins,
+ .pin_dbg_show = starfive_pin_dbg_show,
+ .dt_node_to_map = starfive_dt_node_to_map,
+ .dt_free_map = pinctrl_utils_free_map,
+};
+
+static int starfive_set_mux(struct pinctrl_dev *pctldev,
+ unsigned int fsel, unsigned int gsel)
+{
+ struct starfive_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev);
+ struct device *dev = sfp->gc.parent;
+ const struct group_desc *group;
+ const u32 *pinmux;
+ unsigned int i;
+
+ group = pinctrl_generic_get_group(pctldev, gsel);
+ if (!group)
+ return -EINVAL;
+
+ pinmux = group->data;
+ for (i = 0; i < group->num_pins; i++) {
+ u32 v = pinmux[i];
+ unsigned int gpio = starfive_pinmux_to_gpio(v);
+ u32 dout = starfive_pinmux_to_dout(v);
+ u32 doen = starfive_pinmux_to_doen(v);
+ u32 din = starfive_pinmux_to_din(v);
+ void __iomem *reg_dout;
+ void __iomem *reg_doen;
+ void __iomem *reg_din;
+ unsigned long flags;
+
+ dev_dbg(dev, "GPIO%u: dout=0x%x doen=0x%x din=0x%x\n",
+ gpio, dout, doen, din);
+
+ reg_dout = sfp->base + GPON_DOUT_CFG + 8 * gpio;
+ reg_doen = sfp->base + GPON_DOEN_CFG + 8 * gpio;
+ if (din != GPI_NONE)
+ reg_din = sfp->base + GPI_CFG_OFFSET + 4 * din;
+ else
+ reg_din = NULL;
+
+ raw_spin_lock_irqsave(&sfp->lock, flags);
+ writel_relaxed(dout, reg_dout);
+ writel_relaxed(doen, reg_doen);
+ if (reg_din)
+ writel_relaxed(gpio + 2, reg_din);
+ raw_spin_unlock_irqrestore(&sfp->lock, flags);
+ }
+
+ return 0;
+}
+
+static const struct pinmux_ops starfive_pinmux_ops = {
+ .get_functions_count = pinmux_generic_get_function_count,
+ .get_function_name = pinmux_generic_get_function_name,
+ .get_function_groups = pinmux_generic_get_function_groups,
+ .set_mux = starfive_set_mux,
+ .strict = true,
+};
+
+static u16 starfive_padctl_get(struct starfive_pinctrl *sfp,
+ unsigned int pin)
+{
+ void __iomem *reg = sfp->padctl + 4 * (pin / 2);
+ int shift = 16 * (pin % 2);
+
+ return readl_relaxed(reg) >> shift;
+}
+
+static void starfive_padctl_rmw(struct starfive_pinctrl *sfp,
+ unsigned int pin,
+ u16 _mask, u16 _value)
+{
+ void __iomem *reg = sfp->padctl + 4 * (pin / 2);
+ int shift = 16 * (pin % 2);
+ u32 mask = (u32)_mask << shift;
+ u32 value = (u32)_value << shift;
+ unsigned long flags;
+
+ dev_dbg(sfp->gc.parent, "padctl_rmw(%u, 0x%03x, 0x%03x)\n", pin, _mask, _value);
+
+ raw_spin_lock_irqsave(&sfp->lock, flags);
+ value |= readl_relaxed(reg) & ~mask;
+ writel_relaxed(value, reg);
+ raw_spin_unlock_irqrestore(&sfp->lock, flags);
+}
+
+#define PIN_CONFIG_STARFIVE_STRONG_PULL_UP (PIN_CONFIG_END + 1)
+
+static const struct pinconf_generic_params starfive_pinconf_custom_params[] = {
+ { "starfive,strong-pull-up", PIN_CONFIG_STARFIVE_STRONG_PULL_UP, 1 },
+};
+
+#ifdef CONFIG_DEBUG_FS
+static const struct pin_config_item starfive_pinconf_custom_conf_items[] = {
+ PCONFDUMP(PIN_CONFIG_STARFIVE_STRONG_PULL_UP, "input bias strong pull-up", NULL, false),
+};
+
+static_assert(ARRAY_SIZE(starfive_pinconf_custom_conf_items) ==
+ ARRAY_SIZE(starfive_pinconf_custom_params));
+#else
+#define starfive_pinconf_custom_conf_items NULL
+#endif
+
+static int starfive_pinconf_get(struct pinctrl_dev *pctldev,
+ unsigned int pin, unsigned long *config)
+{
+ struct starfive_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev);
+ int param = pinconf_to_config_param(*config);
+ u16 value = starfive_padctl_get(sfp, pin);
+ bool enabled;
+ u32 arg;
+
+ switch (param) {
+ case PIN_CONFIG_BIAS_DISABLE:
+ enabled = value & PAD_BIAS_DISABLE;
+ arg = 0;
+ break;
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ enabled = value & PAD_BIAS_PULL_DOWN;
+ arg = 1;
+ break;
+ case PIN_CONFIG_BIAS_PULL_UP:
+ enabled = !(value & PAD_BIAS_MASK);
+ arg = 1;
+ break;
+ case PIN_CONFIG_DRIVE_STRENGTH:
+ enabled = value & PAD_DRIVE_STRENGTH_MASK;
+ arg = starfive_drive_strength_to_max_mA(value & PAD_DRIVE_STRENGTH_MASK);
+ break;
+ case PIN_CONFIG_INPUT_ENABLE:
+ enabled = value & PAD_INPUT_ENABLE;
+ arg = enabled;
+ break;
+ case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
+ enabled = value & PAD_INPUT_SCHMITT_ENABLE;
+ arg = enabled;
+ break;
+ case PIN_CONFIG_SLEW_RATE:
+ enabled = value & PAD_SLEW_RATE_MASK;
+ arg = (value & PAD_SLEW_RATE_MASK) >> PAD_SLEW_RATE_POS;
+ break;
+ case PIN_CONFIG_STARFIVE_STRONG_PULL_UP:
+ enabled = value & PAD_BIAS_STRONG_PULL_UP;
+ arg = enabled;
+ break;
+ default:
+ return -ENOTSUPP;
+ }
+
+ *config = pinconf_to_config_packed(param, arg);
+ return enabled ? 0 : -EINVAL;
+}
+
+static int starfive_pinconf_group_get(struct pinctrl_dev *pctldev,
+ unsigned int gsel, unsigned long *config)
+{
+ const struct group_desc *group;
+
+ group = pinctrl_generic_get_group(pctldev, gsel);
+ if (!group)
+ return -EINVAL;
+
+ return starfive_pinconf_get(pctldev, group->pins[0], config);
+}
+
+static int starfive_pinconf_group_set(struct pinctrl_dev *pctldev,
+ unsigned int gsel,
+ unsigned long *configs,
+ unsigned int num_configs)
+{
+ struct starfive_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev);
+ const struct group_desc *group;
+ u16 mask, value;
+ int i;
+
+ group = pinctrl_generic_get_group(pctldev, gsel);
+ if (!group)
+ return -EINVAL;
+
+ mask = 0;
+ value = 0;
+ for (i = 0; i < num_configs; i++) {
+ int param = pinconf_to_config_param(configs[i]);
+ u32 arg = pinconf_to_config_argument(configs[i]);
+
+ switch (param) {
+ case PIN_CONFIG_BIAS_DISABLE:
+ mask |= PAD_BIAS_MASK;
+ value = (value & ~PAD_BIAS_MASK) | PAD_BIAS_DISABLE;
+ break;
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ if (arg == 0)
+ return -ENOTSUPP;
+ mask |= PAD_BIAS_MASK;
+ value = (value & ~PAD_BIAS_MASK) | PAD_BIAS_PULL_DOWN;
+ break;
+ case PIN_CONFIG_BIAS_PULL_UP:
+ if (arg == 0)
+ return -ENOTSUPP;
+ mask |= PAD_BIAS_MASK;
+ value = value & ~PAD_BIAS_MASK;
+ break;
+ case PIN_CONFIG_DRIVE_STRENGTH:
+ mask |= PAD_DRIVE_STRENGTH_MASK;
+ value = (value & ~PAD_DRIVE_STRENGTH_MASK) |
+ starfive_drive_strength_from_max_mA(arg);
+ break;
+ case PIN_CONFIG_INPUT_ENABLE:
+ mask |= PAD_INPUT_ENABLE;
+ if (arg)
+ value |= PAD_INPUT_ENABLE;
+ else
+ value &= ~PAD_INPUT_ENABLE;
+ break;
+ case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
+ mask |= PAD_INPUT_SCHMITT_ENABLE;
+ if (arg)
+ value |= PAD_INPUT_SCHMITT_ENABLE;
+ else
+ value &= ~PAD_INPUT_SCHMITT_ENABLE;
+ break;
+ case PIN_CONFIG_SLEW_RATE:
+ mask |= PAD_SLEW_RATE_MASK;
+ value = (value & ~PAD_SLEW_RATE_MASK) |
+ ((arg << PAD_SLEW_RATE_POS) & PAD_SLEW_RATE_MASK);
+ break;
+ case PIN_CONFIG_STARFIVE_STRONG_PULL_UP:
+ if (arg) {
+ mask |= PAD_BIAS_MASK;
+ value = (value & ~PAD_BIAS_MASK) |
+ PAD_BIAS_STRONG_PULL_UP;
+ } else {
+ mask |= PAD_BIAS_STRONG_PULL_UP;
+ value = value & ~PAD_BIAS_STRONG_PULL_UP;
+ }
+ break;
+ default:
+ return -ENOTSUPP;
+ }
+ }
+
+ for (i = 0; i < group->num_pins; i++)
+ starfive_padctl_rmw(sfp, group->pins[i], mask, value);
+
+ return 0;
+}
+
+#ifdef CONFIG_DEBUG_FS
+static void starfive_pinconf_dbg_show(struct pinctrl_dev *pctldev,
+ struct seq_file *s, unsigned int pin)
+{
+ struct starfive_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev);
+ u16 value = starfive_padctl_get(sfp, pin);
+
+ seq_printf(s, " (0x%03x)", value);
+}
+#else
+#define starfive_pinconf_dbg_show NULL
+#endif
+
+static const struct pinconf_ops starfive_pinconf_ops = {
+ .pin_config_get = starfive_pinconf_get,
+ .pin_config_group_get = starfive_pinconf_group_get,
+ .pin_config_group_set = starfive_pinconf_group_set,
+ .pin_config_dbg_show = starfive_pinconf_dbg_show,
+ .is_generic = true,
+};
+
+static struct pinctrl_desc starfive_desc = {
+ .name = DRIVER_NAME,
+ .pins = starfive_pins,
+ .npins = ARRAY_SIZE(starfive_pins),
+ .pctlops = &starfive_pinctrl_ops,
+ .pmxops = &starfive_pinmux_ops,
+ .confops = &starfive_pinconf_ops,
+ .owner = THIS_MODULE,
+ .num_custom_params = ARRAY_SIZE(starfive_pinconf_custom_params),
+ .custom_params = starfive_pinconf_custom_params,
+ .custom_conf_items = starfive_pinconf_custom_conf_items,
+};
+
+static int starfive_gpio_request(struct gpio_chip *gc, unsigned int gpio)
+{
+ return pinctrl_gpio_request(gc->base + gpio);
+}
+
+static void starfive_gpio_free(struct gpio_chip *gc, unsigned int gpio)
+{
+ pinctrl_gpio_free(gc->base + gpio);
+}
+
+static int starfive_gpio_get_direction(struct gpio_chip *gc, unsigned int gpio)
+{
+ struct starfive_pinctrl *sfp = container_of(gc, struct starfive_pinctrl, gc);
+ void __iomem *doen = sfp->base + GPON_DOEN_CFG + 8 * gpio;
+
+ if (readl_relaxed(doen) == GPO_ENABLE)
+ return GPIO_LINE_DIRECTION_OUT;
+
+ return GPIO_LINE_DIRECTION_IN;
+}
+
+static int starfive_gpio_direction_input(struct gpio_chip *gc,
+ unsigned int gpio)
+{
+ struct starfive_pinctrl *sfp = container_of(gc, struct starfive_pinctrl, gc);
+ void __iomem *doen = sfp->base + GPON_DOEN_CFG + 8 * gpio;
+ unsigned long flags;
+
+ /* enable input and schmitt trigger */
+ starfive_padctl_rmw(sfp, starfive_gpio_to_pin(sfp, gpio),
+ PAD_INPUT_ENABLE | PAD_INPUT_SCHMITT_ENABLE,
+ PAD_INPUT_ENABLE | PAD_INPUT_SCHMITT_ENABLE);
+
+ raw_spin_lock_irqsave(&sfp->lock, flags);
+ writel_relaxed(GPO_DISABLE, doen);
+ raw_spin_unlock_irqrestore(&sfp->lock, flags);
+ return 0;
+}
+
+static int starfive_gpio_direction_output(struct gpio_chip *gc,
+ unsigned int gpio, int value)
+{
+ struct starfive_pinctrl *sfp = container_of(gc, struct starfive_pinctrl, gc);
+ void __iomem *dout = sfp->base + GPON_DOUT_CFG + 8 * gpio;
+ void __iomem *doen = sfp->base + GPON_DOEN_CFG + 8 * gpio;
+ unsigned long flags;
+
+ raw_spin_lock_irqsave(&sfp->lock, flags);
+ writel_relaxed(value, dout);
+ writel_relaxed(GPO_ENABLE, doen);
+ raw_spin_unlock_irqrestore(&sfp->lock, flags);
+
+ /* disable input, schmitt trigger and bias */
+ starfive_padctl_rmw(sfp, starfive_gpio_to_pin(sfp, gpio),
+ PAD_BIAS_MASK | PAD_INPUT_ENABLE | PAD_INPUT_SCHMITT_ENABLE,
+ PAD_BIAS_DISABLE);
+
+ return 0;
+}
+
+static int starfive_gpio_get(struct gpio_chip *gc, unsigned int gpio)
+{
+ struct starfive_pinctrl *sfp = container_of(gc, struct starfive_pinctrl, gc);
+ void __iomem *din = sfp->base + GPIODIN + 4 * (gpio / 32);
+
+ return !!(readl_relaxed(din) & BIT(gpio % 32));
+}
+
+static void starfive_gpio_set(struct gpio_chip *gc, unsigned int gpio,
+ int value)
+{
+ struct starfive_pinctrl *sfp = container_of(gc, struct starfive_pinctrl, gc);
+ void __iomem *dout = sfp->base + GPON_DOUT_CFG + 8 * gpio;
+ unsigned long flags;
+
+ raw_spin_lock_irqsave(&sfp->lock, flags);
+ writel_relaxed(value, dout);
+ raw_spin_unlock_irqrestore(&sfp->lock, flags);
+}
+
+static int starfive_gpio_set_config(struct gpio_chip *gc, unsigned int gpio,
+ unsigned long config)
+{
+ struct starfive_pinctrl *sfp = container_of(gc, struct starfive_pinctrl, gc);
+ u32 arg = pinconf_to_config_argument(config);
+ u16 value;
+ u16 mask;
+
+ switch (pinconf_to_config_param(config)) {
+ case PIN_CONFIG_BIAS_DISABLE:
+ mask = PAD_BIAS_MASK;
+ value = PAD_BIAS_DISABLE;
+ break;
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ if (arg == 0)
+ return -ENOTSUPP;
+ mask = PAD_BIAS_MASK;
+ value = PAD_BIAS_PULL_DOWN;
+ break;
+ case PIN_CONFIG_BIAS_PULL_UP:
+ if (arg == 0)
+ return -ENOTSUPP;
+ mask = PAD_BIAS_MASK;
+ value = 0;
+ break;
+ case PIN_CONFIG_DRIVE_PUSH_PULL:
+ return 0;
+ case PIN_CONFIG_INPUT_ENABLE:
+ mask = PAD_INPUT_ENABLE;
+ value = arg ? PAD_INPUT_ENABLE : 0;
+ break;
+ case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
+ mask = PAD_INPUT_SCHMITT_ENABLE;
+ value = arg ? PAD_INPUT_SCHMITT_ENABLE : 0;
+ break;
+ default:
+ return -ENOTSUPP;
+ };
+
+ starfive_padctl_rmw(sfp, starfive_gpio_to_pin(sfp, gpio), mask, value);
+ return 0;
+}
+
+static int starfive_gpio_add_pin_ranges(struct gpio_chip *gc)
+{
+ struct starfive_pinctrl *sfp = container_of(gc, struct starfive_pinctrl, gc);
+
+ sfp->gpios.name = sfp->gc.label;
+ sfp->gpios.base = sfp->gc.base;
+ /*
+ * sfp->gpios.pin_base depends on the chosen signal group
+ * and is set in starfive_probe()
+ */
+ sfp->gpios.npins = NR_GPIOS;
+ sfp->gpios.gc = &sfp->gc;
+ pinctrl_add_gpio_range(sfp->pctl, &sfp->gpios);
+ return 0;
+}
+
+static void starfive_irq_ack(struct irq_data *d)
+{
+ struct starfive_pinctrl *sfp = starfive_from_irq_data(d);
+ irq_hw_number_t gpio = irqd_to_hwirq(d);
+ void __iomem *ic = sfp->base + GPIOIC + 4 * (gpio / 32);
+ u32 mask = BIT(gpio % 32);
+ unsigned long flags;
+
+ raw_spin_lock_irqsave(&sfp->lock, flags);
+ writel_relaxed(mask, ic);
+ raw_spin_unlock_irqrestore(&sfp->lock, flags);
+}
+
+static void starfive_irq_mask(struct irq_data *d)
+{
+ struct starfive_pinctrl *sfp = starfive_from_irq_data(d);
+ irq_hw_number_t gpio = irqd_to_hwirq(d);
+ void __iomem *ie = sfp->base + GPIOIE + 4 * (gpio / 32);
+ u32 mask = BIT(gpio % 32);
+ unsigned long flags;
+ u32 value;
+
+ raw_spin_lock_irqsave(&sfp->lock, flags);
+ value = readl_relaxed(ie) & ~mask;
+ writel_relaxed(value, ie);
+ raw_spin_unlock_irqrestore(&sfp->lock, flags);
+}
+
+static void starfive_irq_mask_ack(struct irq_data *d)
+{
+ struct starfive_pinctrl *sfp = starfive_from_irq_data(d);
+ irq_hw_number_t gpio = irqd_to_hwirq(d);
+ void __iomem *ie = sfp->base + GPIOIE + 4 * (gpio / 32);
+ void __iomem *ic = sfp->base + GPIOIC + 4 * (gpio / 32);
+ u32 mask = BIT(gpio % 32);
+ unsigned long flags;
+ u32 value;
+
+ raw_spin_lock_irqsave(&sfp->lock, flags);
+ value = readl_relaxed(ie) & ~mask;
+ writel_relaxed(value, ie);
+ writel_relaxed(mask, ic);
+ raw_spin_unlock_irqrestore(&sfp->lock, flags);
+}
+
+static void starfive_irq_unmask(struct irq_data *d)
+{
+ struct starfive_pinctrl *sfp = starfive_from_irq_data(d);
+ irq_hw_number_t gpio = irqd_to_hwirq(d);
+ void __iomem *ie = sfp->base + GPIOIE + 4 * (gpio / 32);
+ u32 mask = BIT(gpio % 32);
+ unsigned long flags;
+ u32 value;
+
+ raw_spin_lock_irqsave(&sfp->lock, flags);
+ value = readl_relaxed(ie) | mask;
+ writel_relaxed(value, ie);
+ raw_spin_unlock_irqrestore(&sfp->lock, flags);
+}
+
+static int starfive_irq_set_type(struct irq_data *d, unsigned int trigger)
+{
+ struct starfive_pinctrl *sfp = starfive_from_irq_data(d);
+ irq_hw_number_t gpio = irqd_to_hwirq(d);
+ void __iomem *base = sfp->base + 4 * (gpio / 32);
+ u32 mask = BIT(gpio % 32);
+ u32 irq_type, edge_both, polarity;
+ unsigned long flags;
+
+ switch (trigger) {
+ case IRQ_TYPE_EDGE_RISING:
+ irq_type = mask; /* 1: edge triggered */
+ edge_both = 0; /* 0: single edge */
+ polarity = mask; /* 1: rising edge */
+ break;
+ case IRQ_TYPE_EDGE_FALLING:
+ irq_type = mask; /* 1: edge triggered */
+ edge_both = 0; /* 0: single edge */
+ polarity = 0; /* 0: falling edge */
+ break;
+ case IRQ_TYPE_EDGE_BOTH:
+ irq_type = mask; /* 1: edge triggered */
+ edge_both = mask; /* 1: both edges */
+ polarity = 0; /* 0: ignored */
+ break;
+ case IRQ_TYPE_LEVEL_HIGH:
+ irq_type = 0; /* 0: level triggered */
+ edge_both = 0; /* 0: ignored */
+ polarity = mask; /* 1: high level */
+ break;
+ case IRQ_TYPE_LEVEL_LOW:
+ irq_type = 0; /* 0: level triggered */
+ edge_both = 0; /* 0: ignored */
+ polarity = 0; /* 0: low level */
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (trigger & IRQ_TYPE_EDGE_BOTH)
+ irq_set_handler_locked(d, handle_edge_irq);
+ else
+ irq_set_handler_locked(d, handle_level_irq);
+
+ raw_spin_lock_irqsave(&sfp->lock, flags);
+ irq_type |= readl_relaxed(base + GPIOIS) & ~mask;
+ writel_relaxed(irq_type, base + GPIOIS);
+ edge_both |= readl_relaxed(base + GPIOIBE) & ~mask;
+ writel_relaxed(edge_both, base + GPIOIBE);
+ polarity |= readl_relaxed(base + GPIOIEV) & ~mask;
+ writel_relaxed(polarity, base + GPIOIEV);
+ raw_spin_unlock_irqrestore(&sfp->lock, flags);
+ return 0;
+}
+
+static struct irq_chip starfive_irq_chip = {
+ .irq_ack = starfive_irq_ack,
+ .irq_mask = starfive_irq_mask,
+ .irq_mask_ack = starfive_irq_mask_ack,
+ .irq_unmask = starfive_irq_unmask,
+ .irq_set_type = starfive_irq_set_type,
+ .flags = IRQCHIP_SET_TYPE_MASKED,
+};
+
+static void starfive_gpio_irq_handler(struct irq_desc *desc)
+{
+ struct starfive_pinctrl *sfp = starfive_from_irq_desc(desc);
+ struct irq_chip *chip = irq_desc_get_chip(desc);
+ unsigned long mis;
+ unsigned int pin;
+
+ chained_irq_enter(chip, desc);
+
+ mis = readl_relaxed(sfp->base + GPIOMIS + 0);
+ for_each_set_bit(pin, &mis, 32)
+ generic_handle_domain_irq(sfp->gc.irq.domain, pin);
+
+ mis = readl_relaxed(sfp->base + GPIOMIS + 4);
+ for_each_set_bit(pin, &mis, 32)
+ generic_handle_domain_irq(sfp->gc.irq.domain, pin + 32);
+
+ chained_irq_exit(chip, desc);
+}
+
+static int starfive_gpio_init_hw(struct gpio_chip *gc)
+{
+ struct starfive_pinctrl *sfp = container_of(gc, struct starfive_pinctrl, gc);
+
+ /* mask all GPIO interrupts */
+ writel(0, sfp->base + GPIOIE + 0);
+ writel(0, sfp->base + GPIOIE + 4);
+ /* clear edge interrupt flags */
+ writel(~0U, sfp->base + GPIOIC + 0);
+ writel(~0U, sfp->base + GPIOIC + 4);
+ /* enable GPIO interrupts */
+ writel(1, sfp->base + GPIOEN);
+ return 0;
+}
+
+static void starfive_disable_clock(void *data)
+{
+ clk_disable_unprepare(data);
+}
+
+static int starfive_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct starfive_pinctrl *sfp;
+ struct reset_control *rst;
+ struct clk *clk;
+ u32 value;
+ int ret;
+
+ sfp = devm_kzalloc(dev, sizeof(*sfp), GFP_KERNEL);
+ if (!sfp)
+ return -ENOMEM;
+
+ sfp->base = devm_platform_ioremap_resource_byname(pdev, "gpio");
+ if (IS_ERR(sfp->base))
+ return PTR_ERR(sfp->base);
+
+ sfp->padctl = devm_platform_ioremap_resource_byname(pdev, "padctl");
+ if (IS_ERR(sfp->padctl))
+ return PTR_ERR(sfp->padctl);
+
+ clk = devm_clk_get(dev, NULL);
+ if (IS_ERR(clk))
+ return dev_err_probe(dev, PTR_ERR(clk), "could not get clock\n");
+
+ rst = devm_reset_control_get_exclusive(dev, NULL);
+ if (IS_ERR(rst))
+ return dev_err_probe(dev, PTR_ERR(rst), "could not get reset\n");
+
+ ret = clk_prepare_enable(clk);
+ if (ret)
+ return dev_err_probe(dev, ret, "could not enable clock\n");
+
+ ret = devm_add_action_or_reset(dev, starfive_disable_clock, clk);
+ if (ret)
+ return ret;
+
+ /*
+ * We don't want to assert reset and risk undoing pin muxing for the
+ * early boot serial console, but let's make sure the reset line is
+ * deasserted in case someone runs a really minimal bootloader.
+ */
+ ret = reset_control_deassert(rst);
+ if (ret)
+ return dev_err_probe(dev, ret, "could not deassert reset\n");
+
+ platform_set_drvdata(pdev, sfp);
+ sfp->gc.parent = dev;
+ raw_spin_lock_init(&sfp->lock);
+
+ ret = devm_pinctrl_register_and_init(dev, &starfive_desc, sfp, &sfp->pctl);
+ if (ret)
+ return dev_err_probe(dev, ret, "could not register pinctrl driver\n");
+
+ if (!of_property_read_u32(dev->of_node, "starfive,signal-group", &value)) {
+ if (value > 6)
+ return dev_err_probe(dev, -EINVAL, "invalid signal group %u\n", value);
+ writel(value, sfp->padctl + IO_PADSHARE_SEL);
+ }
+
+ value = readl(sfp->padctl + IO_PADSHARE_SEL);
+ switch (value) {
+ case 0:
+ sfp->gpios.pin_base = PAD_INVALID_GPIO;
+ goto out_pinctrl_enable;
+ case 1:
+ sfp->gpios.pin_base = PAD_GPIO(0);
+ break;
+ case 2:
+ sfp->gpios.pin_base = PAD_FUNC_SHARE(72);
+ break;
+ case 3:
+ sfp->gpios.pin_base = PAD_FUNC_SHARE(70);
+ break;
+ case 4: case 5: case 6:
+ sfp->gpios.pin_base = PAD_FUNC_SHARE(0);
+ break;
+ default:
+ return dev_err_probe(dev, -EINVAL, "invalid signal group %u\n", value);
+ }
+
+ sfp->gc.label = dev_name(dev);
+ sfp->gc.owner = THIS_MODULE;
+ sfp->gc.request = starfive_gpio_request;
+ sfp->gc.free = starfive_gpio_free;
+ sfp->gc.get_direction = starfive_gpio_get_direction;
+ sfp->gc.direction_input = starfive_gpio_direction_input;
+ sfp->gc.direction_output = starfive_gpio_direction_output;
+ sfp->gc.get = starfive_gpio_get;
+ sfp->gc.set = starfive_gpio_set;
+ sfp->gc.set_config = starfive_gpio_set_config;
+ sfp->gc.add_pin_ranges = starfive_gpio_add_pin_ranges;
+ sfp->gc.base = -1;
+ sfp->gc.ngpio = NR_GPIOS;
+
+ starfive_irq_chip.parent_device = dev;
+ starfive_irq_chip.name = sfp->gc.label;
+
+ sfp->gc.irq.chip = &starfive_irq_chip;
+ sfp->gc.irq.parent_handler = starfive_gpio_irq_handler;
+ sfp->gc.irq.num_parents = 1;
+ sfp->gc.irq.parents = devm_kcalloc(dev, sfp->gc.irq.num_parents,
+ sizeof(*sfp->gc.irq.parents), GFP_KERNEL);
+ if (!sfp->gc.irq.parents)
+ return -ENOMEM;
+ sfp->gc.irq.default_type = IRQ_TYPE_NONE;
+ sfp->gc.irq.handler = handle_bad_irq;
+ sfp->gc.irq.init_hw = starfive_gpio_init_hw;
+
+ ret = platform_get_irq(pdev, 0);
+ if (ret < 0)
+ return ret;
+ sfp->gc.irq.parents[0] = ret;
+
+ ret = devm_gpiochip_add_data(dev, &sfp->gc, sfp);
+ if (ret)
+ return dev_err_probe(dev, ret, "could not register gpiochip\n");
+
+out_pinctrl_enable:
+ return pinctrl_enable(sfp->pctl);
+}
+
+static const struct of_device_id starfive_of_match[] = {
+ { .compatible = "starfive,jh7100-pinctrl" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, starfive_of_match);
+
+static struct platform_driver starfive_pinctrl_driver = {
+ .probe = starfive_probe,
+ .driver = {
+ .name = DRIVER_NAME,
+ .of_match_table = starfive_of_match,
+ },
+};
+module_platform_driver(starfive_pinctrl_driver);
+
+MODULE_DESCRIPTION("Pinctrl driver for StarFive SoCs");
+MODULE_AUTHOR("Emil Renner Berthing <[email protected]>");
+MODULE_LICENSE("GPL v2");
--
2.33.1
Add definitons for pins and GPIO input, output and output enable
signals on the StarFive JH7100 SoC.
Signed-off-by: Emil Renner Berthing <[email protected]>
Acked-by: Rob Herring <[email protected]>
---
.../dt-bindings/pinctrl/pinctrl-starfive.h | 275 ++++++++++++++++++
1 file changed, 275 insertions(+)
create mode 100644 include/dt-bindings/pinctrl/pinctrl-starfive.h
diff --git a/include/dt-bindings/pinctrl/pinctrl-starfive.h b/include/dt-bindings/pinctrl/pinctrl-starfive.h
new file mode 100644
index 000000000000..de4f75c2c9e8
--- /dev/null
+++ b/include/dt-bindings/pinctrl/pinctrl-starfive.h
@@ -0,0 +1,275 @@
+/* SPDX-License-Identifier: GPL-2.0 OR MIT */
+/*
+ * Copyright (C) 2021 Emil Renner Berthing <[email protected]>
+ */
+
+#ifndef __DT_BINDINGS_PINCTRL_STARFIVE_H__
+#define __DT_BINDINGS_PINCTRL_STARFIVE_H__
+
+#define PAD_GPIO_OFFSET 0
+#define PAD_FUNC_SHARE_OFFSET 64
+#define PAD_GPIO(x) (PAD_GPIO_OFFSET + (x))
+#define PAD_FUNC_SHARE(x) (PAD_FUNC_SHARE_OFFSET + (x))
+
+/*
+ * GPIOMUX bits:
+ * | 31 - 24 | 23 - 16 | 15 - 8 | 7 | 6 | 5 - 0 |
+ * | dout | doen | din | dout rev | doen rev | gpio nr |
+ *
+ * dout: output signal
+ * doen: output enable signal
+ * din: optional input signal, 0xff = none
+ * dout rev: output signal reverse bit
+ * doen rev: output enable signal reverse bit
+ * gpio nr: gpio number, 0 - 63
+ */
+#define GPIOMUX(n, dout, doen, din) ( \
+ (((dout) & 0x80000000) >> (31 - 7)) | (((dout) & 0xff) << 24) | \
+ (((doen) & 0x80000000) >> (31 - 6)) | (((doen) & 0xff) << 16) | \
+ (((din) & 0xff) << 8) | \
+ ((n) & 0x3f))
+
+#define GPO_REVERSE 0x80000000
+
+#define GPO_LOW 0
+#define GPO_HIGH 1
+#define GPO_ENABLE 0
+#define GPO_DISABLE 1
+#define GPO_CLK_GMAC_PAPHYREF 2
+#define GPO_JTAG_TDO 3
+#define GPO_JTAG_TDO_OEN 4
+#define GPO_DMIC_CLK_OUT 5
+#define GPO_DSP_JTDOEN_PAD 6
+#define GPO_DSP_JTDO_PAD 7
+#define GPO_I2C0_PAD_SCK_OE 8
+#define GPO_I2C0_PAD_SCK_OEN (GPO_I2C0_PAD_SCK_OE | GPO_REVERSE)
+#define GPO_I2C0_PAD_SDA_OE 9
+#define GPO_I2C0_PAD_SDA_OEN (GPO_I2C0_PAD_SDA_OE | GPO_REVERSE)
+#define GPO_I2C1_PAD_SCK_OE 10
+#define GPO_I2C1_PAD_SCK_OEN (GPO_I2C1_PAD_SCK_OE | GPO_REVERSE)
+#define GPO_I2C1_PAD_SDA_OE 11
+#define GPO_I2C1_PAD_SDA_OEN (GPO_I2C1_PAD_SDA_OE | GPO_REVERSE)
+#define GPO_I2C2_PAD_SCK_OE 12
+#define GPO_I2C2_PAD_SCK_OEN (GPO_I2C2_PAD_SCK_OE | GPO_REVERSE)
+#define GPO_I2C2_PAD_SDA_OE 13
+#define GPO_I2C2_PAD_SDA_OEN (GPO_I2C2_PAD_SDA_OE | GPO_REVERSE)
+#define GPO_I2C3_PAD_SCK_OE 14
+#define GPO_I2C3_PAD_SCK_OEN (GPO_I2C3_PAD_SCK_OE | GPO_REVERSE)
+#define GPO_I2C3_PAD_SDA_OE 15
+#define GPO_I2C3_PAD_SDA_OEN (GPO_I2C3_PAD_SDA_OE | GPO_REVERSE)
+#define GPO_I2SRX_BCLK_OUT 16
+#define GPO_I2SRX_BCLK_OUT_OEN 17
+#define GPO_I2SRX_LRCK_OUT 18
+#define GPO_I2SRX_LRCK_OUT_OEN 19
+#define GPO_I2SRX_MCLK_OUT 20
+#define GPO_I2STX_BCLK_OUT 21
+#define GPO_I2STX_BCLK_OUT_OEN 22
+#define GPO_I2STX_LRCK_OUT 23
+#define GPO_I2STX_LRCK_OUT_OEN 24
+#define GPO_I2STX_MCLK_OUT 25
+#define GPO_I2STX_SDOUT0 26
+#define GPO_I2STX_SDOUT1 27
+#define GPO_LCD_PAD_CSM_N 28
+#define GPO_PWM_PAD_OE_N_BIT0 29
+#define GPO_PWM_PAD_OE_N_BIT1 30
+#define GPO_PWM_PAD_OE_N_BIT2 31
+#define GPO_PWM_PAD_OE_N_BIT3 32
+#define GPO_PWM_PAD_OE_N_BIT4 33
+#define GPO_PWM_PAD_OE_N_BIT5 34
+#define GPO_PWM_PAD_OE_N_BIT6 35
+#define GPO_PWM_PAD_OE_N_BIT7 36
+#define GPO_PWM_PAD_OUT_BIT0 37
+#define GPO_PWM_PAD_OUT_BIT1 38
+#define GPO_PWM_PAD_OUT_BIT2 39
+#define GPO_PWM_PAD_OUT_BIT3 40
+#define GPO_PWM_PAD_OUT_BIT4 41
+#define GPO_PWM_PAD_OUT_BIT5 42
+#define GPO_PWM_PAD_OUT_BIT6 43
+#define GPO_PWM_PAD_OUT_BIT7 44
+#define GPO_PWMDAC_LEFT_OUT 45
+#define GPO_PWMDAC_RIGHT_OUT 46
+#define GPO_QSPI_CSN1_OUT 47
+#define GPO_QSPI_CSN2_OUT 48
+#define GPO_QSPI_CSN3_OUT 49
+#define GPO_REGISTER23_SCFG_CMSENSOR_RST0 50
+#define GPO_REGISTER23_SCFG_CMSENSOR_RST1 51
+#define GPO_REGISTER32_SCFG_GMAC_PHY_RSTN 52
+#define GPO_SDIO0_PAD_CARD_POWER_EN 53
+#define GPO_SDIO0_PAD_CCLK_OUT 54
+#define GPO_SDIO0_PAD_CCMD_OE 55
+#define GPO_SDIO0_PAD_CCMD_OEN (GPO_SDIO0_PAD_CCMD_OE | GPO_REVERSE)
+#define GPO_SDIO0_PAD_CCMD_OUT 56
+#define GPO_SDIO0_PAD_CDATA_OE_BIT0 57
+#define GPO_SDIO0_PAD_CDATA_OEN_BIT0 (GPO_SDIO0_PAD_CDATA_OE_BIT0 | GPO_REVERSE)
+#define GPO_SDIO0_PAD_CDATA_OE_BIT1 58
+#define GPO_SDIO0_PAD_CDATA_OEN_BIT1 (GPO_SDIO0_PAD_CDATA_OE_BIT1 | GPO_REVERSE)
+#define GPO_SDIO0_PAD_CDATA_OE_BIT2 59
+#define GPO_SDIO0_PAD_CDATA_OEN_BIT2 (GPO_SDIO0_PAD_CDATA_OE_BIT2 | GPO_REVERSE)
+#define GPO_SDIO0_PAD_CDATA_OE_BIT3 60
+#define GPO_SDIO0_PAD_CDATA_OEN_BIT3 (GPO_SDIO0_PAD_CDATA_OE_BIT3 | GPO_REVERSE)
+#define GPO_SDIO0_PAD_CDATA_OE_BIT4 61
+#define GPO_SDIO0_PAD_CDATA_OEN_BIT4 (GPO_SDIO0_PAD_CDATA_OE_BIT4 | GPO_REVERSE)
+#define GPO_SDIO0_PAD_CDATA_OE_BIT5 62
+#define GPO_SDIO0_PAD_CDATA_OEN_BIT5 (GPO_SDIO0_PAD_CDATA_OE_BIT5 | GPO_REVERSE)
+#define GPO_SDIO0_PAD_CDATA_OE_BIT6 63
+#define GPO_SDIO0_PAD_CDATA_OEN_BIT6 (GPO_SDIO0_PAD_CDATA_OE_BIT6 | GPO_REVERSE)
+#define GPO_SDIO0_PAD_CDATA_OE_BIT7 64
+#define GPO_SDIO0_PAD_CDATA_OEN_BIT7 (GPO_SDIO0_PAD_CDATA_OE_BIT7 | GPO_REVERSE)
+#define GPO_SDIO0_PAD_CDATA_OUT_BIT0 65
+#define GPO_SDIO0_PAD_CDATA_OUT_BIT1 66
+#define GPO_SDIO0_PAD_CDATA_OUT_BIT2 67
+#define GPO_SDIO0_PAD_CDATA_OUT_BIT3 68
+#define GPO_SDIO0_PAD_CDATA_OUT_BIT4 69
+#define GPO_SDIO0_PAD_CDATA_OUT_BIT5 70
+#define GPO_SDIO0_PAD_CDATA_OUT_BIT6 71
+#define GPO_SDIO0_PAD_CDATA_OUT_BIT7 72
+#define GPO_SDIO0_PAD_RST_N 73
+#define GPO_SDIO1_PAD_CARD_POWER_EN 74
+#define GPO_SDIO1_PAD_CCLK_OUT 75
+#define GPO_SDIO1_PAD_CCMD_OE 76
+#define GPO_SDIO1_PAD_CCMD_OEN (GPO_SDIO1_PAD_CCMD_OE | GPO_REVERSE)
+#define GPO_SDIO1_PAD_CCMD_OUT 77
+#define GPO_SDIO1_PAD_CDATA_OE_BIT0 78
+#define GPO_SDIO1_PAD_CDATA_OEN_BIT0 (GPO_SDIO1_PAD_CDATA_OE_BIT0 | GPO_REVERSE)
+#define GPO_SDIO1_PAD_CDATA_OE_BIT1 79
+#define GPO_SDIO1_PAD_CDATA_OEN_BIT1 (GPO_SDIO1_PAD_CDATA_OE_BIT1 | GPO_REVERSE)
+#define GPO_SDIO1_PAD_CDATA_OE_BIT2 80
+#define GPO_SDIO1_PAD_CDATA_OEN_BIT2 (GPO_SDIO1_PAD_CDATA_OE_BIT2 | GPO_REVERSE)
+#define GPO_SDIO1_PAD_CDATA_OE_BIT3 81
+#define GPO_SDIO1_PAD_CDATA_OEN_BIT3 (GPO_SDIO1_PAD_CDATA_OE_BIT3 | GPO_REVERSE)
+#define GPO_SDIO1_PAD_CDATA_OE_BIT4 82
+#define GPO_SDIO1_PAD_CDATA_OEN_BIT4 (GPO_SDIO1_PAD_CDATA_OE_BIT4 | GPO_REVERSE)
+#define GPO_SDIO1_PAD_CDATA_OE_BIT5 83
+#define GPO_SDIO1_PAD_CDATA_OEN_BIT5 (GPO_SDIO1_PAD_CDATA_OE_BIT5 | GPO_REVERSE)
+#define GPO_SDIO1_PAD_CDATA_OE_BIT6 84
+#define GPO_SDIO1_PAD_CDATA_OEN_BIT6 (GPO_SDIO1_PAD_CDATA_OE_BIT6 | GPO_REVERSE)
+#define GPO_SDIO1_PAD_CDATA_OE_BIT7 85
+#define GPO_SDIO1_PAD_CDATA_OEN_BIT7 (GPO_SDIO1_PAD_CDATA_OE_BIT7 | GPO_REVERSE)
+#define GPO_SDIO1_PAD_CDATA_OUT_BIT0 86
+#define GPO_SDIO1_PAD_CDATA_OUT_BIT1 87
+#define GPO_SDIO1_PAD_CDATA_OUT_BIT2 88
+#define GPO_SDIO1_PAD_CDATA_OUT_BIT3 89
+#define GPO_SDIO1_PAD_CDATA_OUT_BIT4 90
+#define GPO_SDIO1_PAD_CDATA_OUT_BIT5 91
+#define GPO_SDIO1_PAD_CDATA_OUT_BIT6 92
+#define GPO_SDIO1_PAD_CDATA_OUT_BIT7 93
+#define GPO_SDIO1_PAD_RST_N 94
+#define GPO_SPDIF_TX_SDOUT 95
+#define GPO_SPDIF_TX_SDOUT_OEN 96
+#define GPO_SPI0_PAD_OE_N 97
+#define GPO_SPI0_PAD_SCK_OUT 98
+#define GPO_SPI0_PAD_SS_0_N 99
+#define GPO_SPI0_PAD_SS_1_N 100
+#define GPO_SPI0_PAD_TXD 101
+#define GPO_SPI1_PAD_OE_N 102
+#define GPO_SPI1_PAD_SCK_OUT 103
+#define GPO_SPI1_PAD_SS_0_N 104
+#define GPO_SPI1_PAD_SS_1_N 105
+#define GPO_SPI1_PAD_TXD 106
+#define GPO_SPI2_PAD_OE_N 107
+#define GPO_SPI2_PAD_SCK_OUT 108
+#define GPO_SPI2_PAD_SS_0_N 109
+#define GPO_SPI2_PAD_SS_1_N 110
+#define GPO_SPI2_PAD_TXD 111
+#define GPO_SPI2AHB_PAD_OE_N_BIT0 112
+#define GPO_SPI2AHB_PAD_OE_N_BIT1 113
+#define GPO_SPI2AHB_PAD_OE_N_BIT2 114
+#define GPO_SPI2AHB_PAD_OE_N_BIT3 115
+#define GPO_SPI2AHB_PAD_TXD_BIT0 116
+#define GPO_SPI2AHB_PAD_TXD_BIT1 117
+#define GPO_SPI2AHB_PAD_TXD_BIT2 118
+#define GPO_SPI2AHB_PAD_TXD_BIT3 119
+#define GPO_SPI3_PAD_OE_N 120
+#define GPO_SPI3_PAD_SCK_OUT 121
+#define GPO_SPI3_PAD_SS_0_N 122
+#define GPO_SPI3_PAD_SS_1_N 123
+#define GPO_SPI3_PAD_TXD 124
+#define GPO_UART0_PAD_DTRN 125
+#define GPO_UART0_PAD_RTSN 126
+#define GPO_UART0_PAD_SOUT 127
+#define GPO_UART1_PAD_SOUT 128
+#define GPO_UART2_PAD_DTR_N 129
+#define GPO_UART2_PAD_RTS_N 130
+#define GPO_UART2_PAD_SOUT 131
+#define GPO_UART3_PAD_SOUT 132
+#define GPO_USB_DRV_BUS 133
+
+#define GPI_CPU_JTAG_TCK 0
+#define GPI_CPU_JTAG_TDI 1
+#define GPI_CPU_JTAG_TMS 2
+#define GPI_CPU_JTAG_TRST 3
+#define GPI_DMIC_SDIN_BIT0 4
+#define GPI_DMIC_SDIN_BIT1 5
+#define GPI_DSP_JTCK_PAD 6
+#define GPI_DSP_JTDI_PAD 7
+#define GPI_DSP_JTMS_PAD 8
+#define GPI_DSP_TRST_PAD 9
+#define GPI_I2C0_PAD_SCK_IN 10
+#define GPI_I2C0_PAD_SDA_IN 11
+#define GPI_I2C1_PAD_SCK_IN 12
+#define GPI_I2C1_PAD_SDA_IN 13
+#define GPI_I2C2_PAD_SCK_IN 14
+#define GPI_I2C2_PAD_SDA_IN 15
+#define GPI_I2C3_PAD_SCK_IN 16
+#define GPI_I2C3_PAD_SDA_IN 17
+#define GPI_I2SRX_BCLK_IN 18
+#define GPI_I2SRX_LRCK_IN 19
+#define GPI_I2SRX_SDIN_BIT0 20
+#define GPI_I2SRX_SDIN_BIT1 21
+#define GPI_I2SRX_SDIN_BIT2 22
+#define GPI_I2STX_BCLK_IN 23
+#define GPI_I2STX_LRCK_IN 24
+#define GPI_SDIO0_PAD_CARD_DETECT_N 25
+#define GPI_SDIO0_PAD_CARD_WRITE_PRT 26
+#define GPI_SDIO0_PAD_CCMD_IN 27
+#define GPI_SDIO0_PAD_CDATA_IN_BIT0 28
+#define GPI_SDIO0_PAD_CDATA_IN_BIT1 29
+#define GPI_SDIO0_PAD_CDATA_IN_BIT2 30
+#define GPI_SDIO0_PAD_CDATA_IN_BIT3 31
+#define GPI_SDIO0_PAD_CDATA_IN_BIT4 32
+#define GPI_SDIO0_PAD_CDATA_IN_BIT5 33
+#define GPI_SDIO0_PAD_CDATA_IN_BIT6 34
+#define GPI_SDIO0_PAD_CDATA_IN_BIT7 35
+#define GPI_SDIO1_PAD_CARD_DETECT_N 36
+#define GPI_SDIO1_PAD_CARD_WRITE_PRT 37
+#define GPI_SDIO1_PAD_CCMD_IN 38
+#define GPI_SDIO1_PAD_CDATA_IN_BIT0 39
+#define GPI_SDIO1_PAD_CDATA_IN_BIT1 40
+#define GPI_SDIO1_PAD_CDATA_IN_BIT2 41
+#define GPI_SDIO1_PAD_CDATA_IN_BIT3 42
+#define GPI_SDIO1_PAD_CDATA_IN_BIT4 43
+#define GPI_SDIO1_PAD_CDATA_IN_BIT5 44
+#define GPI_SDIO1_PAD_CDATA_IN_BIT6 45
+#define GPI_SDIO1_PAD_CDATA_IN_BIT7 46
+#define GPI_SPDIF_RX_SDIN 47
+#define GPI_SPI0_PAD_RXD 48
+#define GPI_SPI0_PAD_SS_IN_N 49
+#define GPI_SPI1_PAD_RXD 50
+#define GPI_SPI1_PAD_SS_IN_N 51
+#define GPI_SPI2_PAD_RXD 52
+#define GPI_SPI2_PAD_SS_IN_N 53
+#define GPI_SPI2AHB_PAD_RXD_BIT0 54
+#define GPI_SPI2AHB_PAD_RXD_BIT1 55
+#define GPI_SPI2AHB_PAD_RXD_BIT2 56
+#define GPI_SPI2AHB_PAD_RXD_BIT3 57
+#define GPI_SPI2AHB_PAD_SS_N 58
+#define GPI_SPI2AHB_SLV_SCLKIN 59
+#define GPI_SPI3_PAD_RXD 60
+#define GPI_SPI3_PAD_SS_IN_N 61
+#define GPI_UART0_PAD_CTSN 62
+#define GPI_UART0_PAD_DCDN 63
+#define GPI_UART0_PAD_DSRN 64
+#define GPI_UART0_PAD_RIN 65
+#define GPI_UART0_PAD_SIN 66
+#define GPI_UART1_PAD_SIN 67
+#define GPI_UART2_PAD_CTS_N 68
+#define GPI_UART2_PAD_DCD_N 69
+#define GPI_UART2_PAD_DSR_N 70
+#define GPI_UART2_PAD_RI_N 71
+#define GPI_UART2_PAD_SIN 72
+#define GPI_UART3_PAD_SIN 73
+#define GPI_USB_OVER_CURRENT 74
+
+#define GPI_NONE 0xff
+
+#endif /* __DT_BINDINGS_PINCTRL_STARFIVE_H__ */
--
2.33.1
Add a driver for the StarFive JH7100 reset controller.
Signed-off-by: Emil Renner Berthing <[email protected]>
---
MAINTAINERS | 7 +
drivers/reset/Kconfig | 7 +
drivers/reset/Makefile | 1 +
drivers/reset/reset-starfive-jh7100.c | 176 ++++++++++++++++++++++++++
4 files changed, 191 insertions(+)
create mode 100644 drivers/reset/reset-starfive-jh7100.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 2548ef1f8246..1152f5d94690 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -18137,6 +18137,13 @@ F: Documentation/devicetree/bindings/clock/starfive,jh7100-clkgen.yaml
F: drivers/clk/starfive/clk-starfive-jh7100.c
F: include/dt-bindings/clock/starfive-jh7100.h
+STARFIVE JH7100 RESET CONTROLLER DRIVER
+M: Emil Renner Berthing <[email protected]>
+S: Maintained
+F: Documentation/devicetree/bindings/reset/starfive,jh7100-reset.yaml
+F: drivers/reset/reset-starfive-jh7100.c
+F: include/dt-bindings/reset/starfive-jh7100.h
+
STATIC BRANCH/CALL
M: Peter Zijlstra <[email protected]>
M: Josh Poimboeuf <[email protected]>
diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig
index 85024eb1d2ea..6f8ba0ddc05f 100644
--- a/drivers/reset/Kconfig
+++ b/drivers/reset/Kconfig
@@ -224,6 +224,13 @@ config RESET_SOCFPGA
This enables the reset driver for the SoCFPGA ARMv7 platforms. This
driver gets initialized early during platform init calls.
+config RESET_STARFIVE_JH7100
+ bool "StarFive JH7100 Reset Driver"
+ depends on SOC_STARFIVE || COMPILE_TEST
+ default SOC_STARFIVE
+ help
+ This enables the reset controller driver for the StarFive JH7100 SoC.
+
config RESET_SUNXI
bool "Allwinner SoCs Reset Driver" if COMPILE_TEST && !ARCH_SUNXI
default ARCH_SUNXI
diff --git a/drivers/reset/Makefile b/drivers/reset/Makefile
index 21d46d8869ff..bd0a97be18b5 100644
--- a/drivers/reset/Makefile
+++ b/drivers/reset/Makefile
@@ -29,6 +29,7 @@ obj-$(CONFIG_RESET_RZG2L_USBPHY_CTRL) += reset-rzg2l-usbphy-ctrl.o
obj-$(CONFIG_RESET_SCMI) += reset-scmi.o
obj-$(CONFIG_RESET_SIMPLE) += reset-simple.o
obj-$(CONFIG_RESET_SOCFPGA) += reset-socfpga.o
+obj-$(CONFIG_RESET_STARFIVE_JH7100) += reset-starfive-jh7100.o
obj-$(CONFIG_RESET_SUNXI) += reset-sunxi.o
obj-$(CONFIG_RESET_TI_SCI) += reset-ti-sci.o
obj-$(CONFIG_RESET_TI_SYSCON) += reset-ti-syscon.o
diff --git a/drivers/reset/reset-starfive-jh7100.c b/drivers/reset/reset-starfive-jh7100.c
new file mode 100644
index 000000000000..2f7615cbf1dc
--- /dev/null
+++ b/drivers/reset/reset-starfive-jh7100.c
@@ -0,0 +1,176 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Reset driver for the StarFive JH7100 SoC
+ *
+ * Copyright (C) 2021 Emil Renner Berthing <[email protected]>
+ */
+
+#include <linux/bitmap.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/mod_devicetable.h>
+#include <linux/platform_device.h>
+#include <linux/reset-controller.h>
+#include <linux/spinlock.h>
+
+#include <dt-bindings/reset/starfive-jh7100.h>
+
+/* register offsets */
+#define JH7100_RESET_ASSERT0 0x00
+#define JH7100_RESET_ASSERT1 0x04
+#define JH7100_RESET_ASSERT2 0x08
+#define JH7100_RESET_ASSERT3 0x0c
+#define JH7100_RESET_STATUS0 0x10
+#define JH7100_RESET_STATUS1 0x14
+#define JH7100_RESET_STATUS2 0x18
+#define JH7100_RESET_STATUS3 0x1c
+
+#if BITS_PER_LONG == 64
+#define jh7100_reset_read readq
+#define jh7100_reset_write writeq
+#else
+#define jh7100_reset_read readl
+#define jh7100_reset_write writel
+#endif
+
+/*
+ * Writing a 1 to the n'th bit of the m'th ASSERT register asserts
+ * line 32m + n, and writing a 0 deasserts the same line.
+ * Most reset lines have their status inverted so a 0 bit in the STATUS
+ * register means the line is asserted and a 1 means it's deasserted. A few
+ * lines don't though, so store the expected value of the status registers when
+ * all lines are asserted.
+ */
+static const DECLARE_BITMAP(jh7100_reset_asserted, 4 * 32) = {
+ BITMAP_FROM_U64(BIT_ULL_MASK(JH7100_RST_U74) |
+ BIT_ULL_MASK(JH7100_RST_VP6_DRESET) |
+ BIT_ULL_MASK(JH7100_RST_VP6_BRESET) |
+ BIT_ULL_MASK(JH7100_RST_HIFI4_DRESET) |
+ BIT_ULL_MASK(JH7100_RST_HIFI4_BRESET)),
+ BITMAP_FROM_U64(BIT_ULL_MASK(JH7100_RST_E24)),
+};
+
+struct jh7100_reset {
+ struct reset_controller_dev rcdev;
+ /* protect registers against concurrent read-modify-write */
+ spinlock_t lock;
+ void __iomem *base;
+};
+
+static inline struct jh7100_reset *
+jh7100_reset_from(struct reset_controller_dev *rcdev)
+{
+ return container_of(rcdev, struct jh7100_reset, rcdev);
+}
+
+static int jh7100_reset_update(struct reset_controller_dev *rcdev,
+ unsigned long id, bool assert)
+{
+ struct jh7100_reset *data = jh7100_reset_from(rcdev);
+ unsigned long offset = id / BITS_PER_LONG;
+ void __iomem *reg_assert = data->base + JH7100_RESET_ASSERT0 + offset * sizeof(long);
+ void __iomem *reg_status = data->base + JH7100_RESET_STATUS0 + offset * sizeof(long);
+ unsigned long mask = BIT_MASK(id);
+ unsigned long done = jh7100_reset_asserted[offset] & mask;
+ unsigned long value;
+ unsigned long flags;
+ int ret;
+
+ if (!assert)
+ done ^= mask;
+
+ spin_lock_irqsave(&data->lock, flags);
+
+ value = jh7100_reset_read(reg_assert);
+ if (assert)
+ value |= mask;
+ else
+ value &= ~mask;
+ jh7100_reset_write(value, reg_assert);
+
+ /* if the associated clock is gated, deasserting might otherwise hang forever */
+ ret = readx_poll_timeout_atomic(jh7100_reset_read, reg_status, value,
+ (value & mask) == done, 0, 1000);
+
+ spin_unlock_irqrestore(&data->lock, flags);
+ return ret;
+}
+
+static int jh7100_reset_assert(struct reset_controller_dev *rcdev,
+ unsigned long id)
+{
+ return jh7100_reset_update(rcdev, id, true);
+}
+
+static int jh7100_reset_deassert(struct reset_controller_dev *rcdev,
+ unsigned long id)
+{
+ return jh7100_reset_update(rcdev, id, false);
+}
+
+static int jh7100_reset_reset(struct reset_controller_dev *rcdev,
+ unsigned long id)
+{
+ int ret;
+
+ ret = jh7100_reset_assert(rcdev, id);
+ if (ret)
+ return ret;
+
+ return jh7100_reset_deassert(rcdev, id);
+}
+
+static int jh7100_reset_status(struct reset_controller_dev *rcdev,
+ unsigned long id)
+{
+ struct jh7100_reset *data = jh7100_reset_from(rcdev);
+ unsigned long offset = id / BITS_PER_LONG;
+ void __iomem *reg_status = data->base + JH7100_RESET_STATUS0 + offset * sizeof(long);
+ unsigned long value = jh7100_reset_read(reg_status);
+ unsigned long mask = BIT_MASK(id);
+
+ return !((value ^ jh7100_reset_asserted[offset]) & mask);
+}
+
+static const struct reset_control_ops jh7100_reset_ops = {
+ .assert = jh7100_reset_assert,
+ .deassert = jh7100_reset_deassert,
+ .reset = jh7100_reset_reset,
+ .status = jh7100_reset_status,
+};
+
+static int __init jh7100_reset_probe(struct platform_device *pdev)
+{
+ struct jh7100_reset *data;
+
+ data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(data->base))
+ return PTR_ERR(data->base);
+
+ data->rcdev.ops = &jh7100_reset_ops;
+ data->rcdev.owner = THIS_MODULE;
+ data->rcdev.nr_resets = JH7100_RSTN_END;
+ data->rcdev.dev = &pdev->dev;
+ data->rcdev.of_node = pdev->dev.of_node;
+ spin_lock_init(&data->lock);
+
+ return devm_reset_controller_register(&pdev->dev, &data->rcdev);
+}
+
+static const struct of_device_id jh7100_reset_dt_ids[] = {
+ { .compatible = "starfive,jh7100-reset" },
+ { /* sentinel */ }
+};
+
+static struct platform_driver jh7100_reset_driver = {
+ .driver = {
+ .name = "jh7100-reset",
+ .of_match_table = jh7100_reset_dt_ids,
+ .suppress_bind_attrs = true,
+ },
+};
+builtin_platform_driver_probe(jh7100_reset_driver, jh7100_reset_probe);
--
2.33.1
From: Geert Uytterhoeven <[email protected]>
Add all resets for the StarFive JH7100 reset controller.
Based on work by Ahmad Fatoum for Barebox, with "JH7100_" prefixes added
to all definitions.
Signed-off-by: Geert Uytterhoeven <[email protected]>
Signed-off-by: Emil Renner Berthing <[email protected]>
Acked-by: Rob Herring <[email protected]>
---
include/dt-bindings/reset/starfive-jh7100.h | 126 ++++++++++++++++++++
1 file changed, 126 insertions(+)
create mode 100644 include/dt-bindings/reset/starfive-jh7100.h
diff --git a/include/dt-bindings/reset/starfive-jh7100.h b/include/dt-bindings/reset/starfive-jh7100.h
new file mode 100644
index 000000000000..540e19254f39
--- /dev/null
+++ b/include/dt-bindings/reset/starfive-jh7100.h
@@ -0,0 +1,126 @@
+/* SPDX-License-Identifier: GPL-2.0 OR MIT */
+/*
+ * Copyright (C) 2021 Ahmad Fatoum, Pengutronix
+ */
+
+#ifndef __DT_BINDINGS_RESET_STARFIVE_JH7100_H__
+#define __DT_BINDINGS_RESET_STARFIVE_JH7100_H__
+
+#define JH7100_RSTN_DOM3AHB_BUS 0
+#define JH7100_RSTN_DOM7AHB_BUS 1
+#define JH7100_RST_U74 2
+#define JH7100_RSTN_U74_AXI 3
+#define JH7100_RSTN_SGDMA2P_AHB 4
+#define JH7100_RSTN_SGDMA2P_AXI 5
+#define JH7100_RSTN_DMA2PNOC_AXI 6
+#define JH7100_RSTN_DLA_AXI 7
+#define JH7100_RSTN_DLANOC_AXI 8
+#define JH7100_RSTN_DLA_APB 9
+#define JH7100_RST_VP6_DRESET 10
+#define JH7100_RST_VP6_BRESET 11
+#define JH7100_RSTN_VP6_AXI 12
+#define JH7100_RSTN_VDECBRG_MAIN 13
+#define JH7100_RSTN_VDEC_AXI 14
+#define JH7100_RSTN_VDEC_BCLK 15
+#define JH7100_RSTN_VDEC_CCLK 16
+#define JH7100_RSTN_VDEC_APB 17
+#define JH7100_RSTN_JPEG_AXI 18
+#define JH7100_RSTN_JPEG_CCLK 19
+#define JH7100_RSTN_JPEG_APB 20
+#define JH7100_RSTN_JPCGC300_MAIN 21
+#define JH7100_RSTN_GC300_2X 22
+#define JH7100_RSTN_GC300_AXI 23
+#define JH7100_RSTN_GC300_AHB 24
+#define JH7100_RSTN_VENC_AXI 25
+#define JH7100_RSTN_VENCBRG_MAIN 26
+#define JH7100_RSTN_VENC_BCLK 27
+#define JH7100_RSTN_VENC_CCLK 28
+#define JH7100_RSTN_VENC_APB 29
+#define JH7100_RSTN_DDRPHY_APB 30
+#define JH7100_RSTN_NOC_ROB 31
+#define JH7100_RSTN_NOC_COG 32
+#define JH7100_RSTN_HIFI4_AXI 33
+#define JH7100_RSTN_HIFI4NOC_AXI 34
+#define JH7100_RST_HIFI4_DRESET 35
+#define JH7100_RST_HIFI4_BRESET 36
+#define JH7100_RSTN_USB_AXI 37
+#define JH7100_RSTN_USBNOC_AXI 38
+#define JH7100_RSTN_SGDMA1P_AXI 39
+#define JH7100_RSTN_DMA1P_AXI 40
+#define JH7100_RSTN_X2C_AXI 41
+#define JH7100_RSTN_NNE_AHB 42
+#define JH7100_RSTN_NNE_AXI 43
+#define JH7100_RSTN_NNENOC_AXI 44
+#define JH7100_RSTN_DLASLV_AXI 45
+#define JH7100_RSTN_DSPX2C_AXI 46
+#define JH7100_RSTN_VIN_SRC 47
+#define JH7100_RSTN_ISPSLV_AXI 48
+#define JH7100_RSTN_VIN_AXI 49
+#define JH7100_RSTN_VINNOC_AXI 50
+#define JH7100_RSTN_ISP0_AXI 51
+#define JH7100_RSTN_ISP0NOC_AXI 52
+#define JH7100_RSTN_ISP1_AXI 53
+#define JH7100_RSTN_ISP1NOC_AXI 54
+#define JH7100_RSTN_VOUT_SRC 55
+#define JH7100_RSTN_DISP_AXI 56
+#define JH7100_RSTN_DISPNOC_AXI 57
+#define JH7100_RSTN_SDIO0_AHB 58
+#define JH7100_RSTN_SDIO1_AHB 59
+#define JH7100_RSTN_GMAC_AHB 60
+#define JH7100_RSTN_SPI2AHB_AHB 61
+#define JH7100_RSTN_SPI2AHB_CORE 62
+#define JH7100_RSTN_EZMASTER_AHB 63
+#define JH7100_RST_E24 64
+#define JH7100_RSTN_QSPI_AHB 65
+#define JH7100_RSTN_QSPI_CORE 66
+#define JH7100_RSTN_QSPI_APB 67
+#define JH7100_RSTN_SEC_AHB 68
+#define JH7100_RSTN_AES 69
+#define JH7100_RSTN_PKA 70
+#define JH7100_RSTN_SHA 71
+#define JH7100_RSTN_TRNG_APB 72
+#define JH7100_RSTN_OTP_APB 73
+#define JH7100_RSTN_UART0_APB 74
+#define JH7100_RSTN_UART0_CORE 75
+#define JH7100_RSTN_UART1_APB 76
+#define JH7100_RSTN_UART1_CORE 77
+#define JH7100_RSTN_SPI0_APB 78
+#define JH7100_RSTN_SPI0_CORE 79
+#define JH7100_RSTN_SPI1_APB 80
+#define JH7100_RSTN_SPI1_CORE 81
+#define JH7100_RSTN_I2C0_APB 82
+#define JH7100_RSTN_I2C0_CORE 83
+#define JH7100_RSTN_I2C1_APB 84
+#define JH7100_RSTN_I2C1_CORE 85
+#define JH7100_RSTN_GPIO_APB 86
+#define JH7100_RSTN_UART2_APB 87
+#define JH7100_RSTN_UART2_CORE 88
+#define JH7100_RSTN_UART3_APB 89
+#define JH7100_RSTN_UART3_CORE 90
+#define JH7100_RSTN_SPI2_APB 91
+#define JH7100_RSTN_SPI2_CORE 92
+#define JH7100_RSTN_SPI3_APB 93
+#define JH7100_RSTN_SPI3_CORE 94
+#define JH7100_RSTN_I2C2_APB 95
+#define JH7100_RSTN_I2C2_CORE 96
+#define JH7100_RSTN_I2C3_APB 97
+#define JH7100_RSTN_I2C3_CORE 98
+#define JH7100_RSTN_WDTIMER_APB 99
+#define JH7100_RSTN_WDT 100
+#define JH7100_RSTN_TIMER0 101
+#define JH7100_RSTN_TIMER1 102
+#define JH7100_RSTN_TIMER2 103
+#define JH7100_RSTN_TIMER3 104
+#define JH7100_RSTN_TIMER4 105
+#define JH7100_RSTN_TIMER5 106
+#define JH7100_RSTN_TIMER6 107
+#define JH7100_RSTN_VP6INTC_APB 108
+#define JH7100_RSTN_PWM_APB 109
+#define JH7100_RSTN_MSI_APB 110
+#define JH7100_RSTN_TEMP_APB 111
+#define JH7100_RSTN_TEMP_SENSE 112
+#define JH7100_RSTN_SYSERR_APB 113
+
+#define JH7100_RSTN_END 114
+
+#endif /* __DT_BINDINGS_RESET_STARFIVE_JH7100_H__ */
--
2.33.1
On the StarFive JH7100 RISC-V SoC the UART core clocks can't be set to
exactly 16 * 115200Hz and many other common bitrates. Trying this will
only result in a higher input clock, but low enough that the UART's
internal divisor can't come close enough to the baud rate target.
So rather than try to set the input clock it's better to skip the
clk_set_rate call and rely solely on the UART's internal divisor.
Signed-off-by: Emil Renner Berthing <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
Reviewed-by: Geert Uytterhoeven <[email protected]>
---
drivers/tty/serial/8250/8250_dw.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c
index 53f57c3b9f42..1769808031c5 100644
--- a/drivers/tty/serial/8250/8250_dw.c
+++ b/drivers/tty/serial/8250/8250_dw.c
@@ -414,6 +414,8 @@ static void dw8250_quirks(struct uart_port *p, struct dw8250_data *data)
if (of_device_is_compatible(np, "marvell,armada-38x-uart"))
p->serial_out = dw8250_serial_out38x;
+ if (of_device_is_compatible(np, "starfive,jh7100-uart"))
+ p->set_termios = dw8250_do_set_termios;
} else if (acpi_dev_present("APMC0D08", NULL, -1)) {
p->iotype = UPIO_MEM32;
@@ -696,6 +698,7 @@ static const struct of_device_id dw8250_of_match[] = {
{ .compatible = "cavium,octeon-3860-uart" },
{ .compatible = "marvell,armada-38x-uart" },
{ .compatible = "renesas,rzn1-uart" },
+ { .compatible = "starfive,jh7100-uart" },
{ /* Sentinel */ }
};
MODULE_DEVICE_TABLE(of, dw8250_of_match);
--
2.33.1
Add compatibles for the StarFive JH7100 uarts.
Signed-off-by: Emil Renner Berthing <[email protected]>
Reviewed-by: Geert Uytterhoeven <[email protected]>
Acked-by: Rob Herring <[email protected]>
---
.../devicetree/bindings/serial/snps-dw-apb-uart.yaml | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml b/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml
index b49fda5e608f..12137fe80acf 100644
--- a/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml
+++ b/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml
@@ -40,6 +40,11 @@ properties:
- brcm,bcm11351-dw-apb-uart
- brcm,bcm21664-dw-apb-uart
- const: snps,dw-apb-uart
+ - items:
+ - enum:
+ - starfive,jh7100-hsuart
+ - starfive,jh7100-uart
+ - const: snps,dw-apb-uart
- const: snps,dw-apb-uart
reg:
--
2.33.1
Add initial device tree for the JH7100 RISC-V SoC by StarFive Ltd. This
is a test chip for their upcoming JH7110 SoC.
The CPU and cache data is based on the device tree in the vendor u-boot
port.
Signed-off-by: Emil Renner Berthing <[email protected]>
---
arch/riscv/boot/dts/starfive/jh7100.dtsi | 230 +++++++++++++++++++++++
1 file changed, 230 insertions(+)
create mode 100644 arch/riscv/boot/dts/starfive/jh7100.dtsi
diff --git a/arch/riscv/boot/dts/starfive/jh7100.dtsi b/arch/riscv/boot/dts/starfive/jh7100.dtsi
new file mode 100644
index 000000000000..69f22f9aad9d
--- /dev/null
+++ b/arch/riscv/boot/dts/starfive/jh7100.dtsi
@@ -0,0 +1,230 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/*
+ * Copyright (C) 2021 StarFive Technology Co., Ltd.
+ * Copyright (C) 2021 Emil Renner Berthing <[email protected]>
+ */
+
+/dts-v1/;
+#include <dt-bindings/clock/starfive-jh7100.h>
+#include <dt-bindings/reset/starfive-jh7100.h>
+
+/ {
+ compatible = "starfive,jh7100";
+ #address-cells = <2>;
+ #size-cells = <2>;
+
+ cpus {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ cpu@0 {
+ compatible = "sifive,u74-mc", "riscv";
+ reg = <0>;
+ d-cache-block-size = <64>;
+ d-cache-sets = <64>;
+ d-cache-size = <32768>;
+ d-tlb-sets = <1>;
+ d-tlb-size = <32>;
+ device_type = "cpu";
+ i-cache-block-size = <64>;
+ i-cache-sets = <64>;
+ i-cache-size = <32768>;
+ i-tlb-sets = <1>;
+ i-tlb-size = <32>;
+ mmu-type = "riscv,sv39";
+ riscv,isa = "rv64imafdc";
+ tlb-split;
+
+ cpu0_intc: interrupt-controller {
+ compatible = "riscv,cpu-intc";
+ interrupt-controller;
+ #interrupt-cells = <1>;
+ };
+ };
+
+ cpu@1 {
+ compatible = "sifive,u74-mc", "riscv";
+ reg = <1>;
+ d-cache-block-size = <64>;
+ d-cache-sets = <64>;
+ d-cache-size = <32768>;
+ d-tlb-sets = <1>;
+ d-tlb-size = <32>;
+ device_type = "cpu";
+ i-cache-block-size = <64>;
+ i-cache-sets = <64>;
+ i-cache-size = <32768>;
+ i-tlb-sets = <1>;
+ i-tlb-size = <32>;
+ mmu-type = "riscv,sv39";
+ riscv,isa = "rv64imafdc";
+ tlb-split;
+
+ cpu1_intc: interrupt-controller {
+ compatible = "riscv,cpu-intc";
+ interrupt-controller;
+ #interrupt-cells = <1>;
+ };
+ };
+ };
+
+ osc_sys: osc_sys {
+ compatible = "fixed-clock";
+ #clock-cells = <0>;
+ /* This value must be overridden by the board */
+ clock-frequency = <0>;
+ };
+
+ osc_aud: osc_aud {
+ compatible = "fixed-clock";
+ #clock-cells = <0>;
+ /* This value must be overridden by the board */
+ clock-frequency = <0>;
+ };
+
+ gmac_rmii_ref: gmac_rmii_ref {
+ compatible = "fixed-clock";
+ #clock-cells = <0>;
+ /* Should be overridden by the board when needed */
+ clock-frequency = <0>;
+ };
+
+ gmac_gr_mii_rxclk: gmac_gr_mii_rxclk {
+ compatible = "fixed-clock";
+ #clock-cells = <0>;
+ /* Should be overridden by the board when needed */
+ clock-frequency = <0>;
+ };
+
+ soc {
+ compatible = "simple-bus";
+ interrupt-parent = <&plic>;
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
+
+ clint: clint@2000000 {
+ compatible = "starfive,jh7100-clint", "sifive,clint0";
+ reg = <0x0 0x2000000 0x0 0x10000>;
+ interrupts-extended = <&cpu0_intc 3 &cpu0_intc 7
+ &cpu1_intc 3 &cpu1_intc 7>;
+ };
+
+ plic: interrupt-controller@c000000 {
+ compatible = "starfive,jh7100-plic", "sifive,plic-1.0.0";
+ reg = <0x0 0xc000000 0x0 0x4000000>;
+ interrupts-extended = <&cpu0_intc 11 &cpu0_intc 9
+ &cpu1_intc 11 &cpu1_intc 9>;
+ interrupt-controller;
+ #address-cells = <0>;
+ #interrupt-cells = <1>;
+ riscv,ndev = <127>;
+ };
+
+ clkgen: clock-controller@11800000 {
+ compatible = "starfive,jh7100-clkgen";
+ reg = <0x0 0x11800000 0x0 0x10000>;
+ clocks = <&osc_sys>, <&osc_aud>, <&gmac_rmii_ref>, <&gmac_gr_mii_rxclk>;
+ clock-names = "osc_sys", "osc_aud", "gmac_rmii_ref", "gmac_gr_mii_rxclk";
+ #clock-cells = <1>;
+ };
+
+ rstgen: reset-controller@11840000 {
+ compatible = "starfive,jh7100-reset";
+ reg = <0x0 0x11840000 0x0 0x10000>;
+ #reset-cells = <1>;
+ };
+
+ i2c0: i2c@118b0000 {
+ compatible = "snps,designware-i2c";
+ reg = <0x0 0x118b0000 0x0 0x10000>;
+ clocks = <&clkgen JH7100_CLK_I2C0_CORE>,
+ <&clkgen JH7100_CLK_I2C0_APB>;
+ clock-names = "ref", "pclk";
+ resets = <&rstgen JH7100_RSTN_I2C0_APB>;
+ interrupts = <96>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ status = "disabled";
+ };
+
+ i2c1: i2c@118c0000 {
+ compatible = "snps,designware-i2c";
+ reg = <0x0 0x118c0000 0x0 0x10000>;
+ clocks = <&clkgen JH7100_CLK_I2C1_CORE>,
+ <&clkgen JH7100_CLK_I2C1_APB>;
+ clock-names = "ref", "pclk";
+ resets = <&rstgen JH7100_RSTN_I2C1_APB>;
+ interrupts = <97>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ status = "disabled";
+ };
+
+ gpio: pinctrl@11910000 {
+ compatible = "starfive,jh7100-pinctrl";
+ reg = <0x0 0x11910000 0x0 0x10000>,
+ <0x0 0x11858000 0x0 0x1000>;
+ reg-names = "gpio", "padctl";
+ clocks = <&clkgen JH7100_CLK_GPIO_APB>;
+ resets = <&rstgen JH7100_RSTN_GPIO_APB>;
+ interrupts = <32>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ };
+
+ uart2: serial@12430000 {
+ compatible = "starfive,jh7100-uart", "snps,dw-apb-uart";
+ reg = <0x0 0x12430000 0x0 0x10000>;
+ clocks = <&clkgen JH7100_CLK_UART2_CORE>,
+ <&clkgen JH7100_CLK_UART2_APB>;
+ clock-names = "baudclk", "apb_pclk";
+ resets = <&rstgen JH7100_RSTN_UART2_APB>;
+ interrupts = <72>;
+ reg-io-width = <4>;
+ reg-shift = <2>;
+ status = "disabled";
+ };
+
+ uart3: serial@12440000 {
+ compatible = "starfive,jh7100-uart", "snps,dw-apb-uart";
+ reg = <0x0 0x12440000 0x0 0x10000>;
+ clocks = <&clkgen JH7100_CLK_UART3_CORE>,
+ <&clkgen JH7100_CLK_UART3_APB>;
+ clock-names = "baudclk", "apb_pclk";
+ resets = <&rstgen JH7100_RSTN_UART3_APB>;
+ interrupts = <73>;
+ reg-io-width = <4>;
+ reg-shift = <2>;
+ status = "disabled";
+ };
+
+ i2c2: i2c@12450000 {
+ compatible = "snps,designware-i2c";
+ reg = <0x0 0x12450000 0x0 0x10000>;
+ clocks = <&clkgen JH7100_CLK_I2C2_CORE>,
+ <&clkgen JH7100_CLK_I2C2_APB>;
+ clock-names = "ref", "pclk";
+ resets = <&rstgen JH7100_RSTN_I2C2_APB>;
+ interrupts = <74>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ status = "disabled";
+ };
+
+ i2c3: i2c@12460000 {
+ compatible = "snps,designware-i2c";
+ reg = <0x0 0x12460000 0x0 0x10000>;
+ clocks = <&clkgen JH7100_CLK_I2C3_CORE>,
+ <&clkgen JH7100_CLK_I2C3_APB>;
+ clock-names = "ref", "pclk";
+ resets = <&rstgen JH7100_RSTN_I2C3_APB>;
+ interrupts = <75>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ status = "disabled";
+ };
+ };
+};
--
2.33.1
Add initial device tree for the BeagleV Starlight Beta board. About 300
of these boards were sent out as part of a now cancelled BeagleBoard.org
project.
I2C timing data is based on the device tree in the vendor u-boot port.
Heartbeat LED added by Geert.
Signed-off-by: Emil Renner Berthing <[email protected]>
Co-developed-by: Geert Uytterhoeven <[email protected]>
Signed-off-by: Geert Uytterhoeven <[email protected]>
---
arch/riscv/boot/dts/Makefile | 1 +
arch/riscv/boot/dts/starfive/Makefile | 2 +
.../dts/starfive/jh7100-beaglev-starlight.dts | 164 ++++++++++++++++++
3 files changed, 167 insertions(+)
create mode 100644 arch/riscv/boot/dts/starfive/Makefile
create mode 100644 arch/riscv/boot/dts/starfive/jh7100-beaglev-starlight.dts
diff --git a/arch/riscv/boot/dts/Makefile b/arch/riscv/boot/dts/Makefile
index fe996b88319e..ff174996cdfd 100644
--- a/arch/riscv/boot/dts/Makefile
+++ b/arch/riscv/boot/dts/Makefile
@@ -1,5 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
subdir-y += sifive
+subdir-y += starfive
subdir-$(CONFIG_SOC_CANAAN_K210_DTB_BUILTIN) += canaan
subdir-y += microchip
diff --git a/arch/riscv/boot/dts/starfive/Makefile b/arch/riscv/boot/dts/starfive/Makefile
new file mode 100644
index 000000000000..0ea1bc15ab30
--- /dev/null
+++ b/arch/riscv/boot/dts/starfive/Makefile
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0
+dtb-$(CONFIG_SOC_STARFIVE) += jh7100-beaglev-starlight.dtb
diff --git a/arch/riscv/boot/dts/starfive/jh7100-beaglev-starlight.dts b/arch/riscv/boot/dts/starfive/jh7100-beaglev-starlight.dts
new file mode 100644
index 000000000000..c9af67f7a0d2
--- /dev/null
+++ b/arch/riscv/boot/dts/starfive/jh7100-beaglev-starlight.dts
@@ -0,0 +1,164 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/*
+ * Copyright (C) 2021 StarFive Technology Co., Ltd.
+ * Copyright (C) 2021 Emil Renner Berthing <[email protected]>
+ */
+
+/dts-v1/;
+#include "jh7100.dtsi"
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/leds/common.h>
+#include <dt-bindings/pinctrl/pinctrl-starfive.h>
+
+/ {
+ model = "BeagleV Starlight Beta";
+ compatible = "beagle,beaglev-starlight-jh7100-r0", "starfive,jh7100";
+
+ aliases {
+ serial0 = &uart3;
+ };
+
+ chosen {
+ stdout-path = "serial0:115200n8";
+ };
+
+ cpus {
+ timebase-frequency = <6250000>;
+ };
+
+ memory@80000000 {
+ device_type = "memory";
+ reg = <0x0 0x80000000 0x2 0x0>;
+ };
+
+ leds {
+ compatible = "gpio-leds";
+
+ led-ack {
+ gpios = <&gpio 43 GPIO_ACTIVE_HIGH>;
+ color = <LED_COLOR_ID_GREEN>;
+ function = LED_FUNCTION_HEARTBEAT;
+ linux,default-trigger = "heartbeat";
+ label = "ack";
+ };
+ };
+};
+
+&gpio {
+ i2c0_pins: i2c0-0 {
+ i2c-pins {
+ pinmux = <GPIOMUX(62, GPO_LOW,
+ GPO_I2C0_PAD_SCK_OEN,
+ GPI_I2C0_PAD_SCK_IN)>,
+ <GPIOMUX(61, GPO_LOW,
+ GPO_I2C0_PAD_SDA_OEN,
+ GPI_I2C0_PAD_SDA_IN)>;
+ bias-disable; /* external pull-up */
+ input-enable;
+ input-schmitt-enable;
+ };
+ };
+
+ i2c1_pins: i2c1-0 {
+ i2c-pins {
+ pinmux = <GPIOMUX(47, GPO_LOW,
+ GPO_I2C1_PAD_SCK_OEN,
+ GPI_I2C1_PAD_SCK_IN)>,
+ <GPIOMUX(48, GPO_LOW,
+ GPO_I2C1_PAD_SDA_OEN,
+ GPI_I2C1_PAD_SDA_IN)>;
+ bias-pull-up;
+ input-enable;
+ input-schmitt-enable;
+ };
+ };
+
+ i2c2_pins: i2c2-0 {
+ i2c-pins {
+ pinmux = <GPIOMUX(60, GPO_LOW,
+ GPO_I2C2_PAD_SCK_OEN,
+ GPI_I2C2_PAD_SCK_IN)>,
+ <GPIOMUX(59, GPO_LOW,
+ GPO_I2C2_PAD_SDA_OEN,
+ GPI_I2C2_PAD_SDA_IN)>;
+ bias-disable; /* external pull-up */
+ input-enable;
+ input-schmitt-enable;
+ };
+ };
+
+ uart3_pins: uart3-0 {
+ rx-pins {
+ pinmux = <GPIOMUX(13, GPO_LOW, GPO_DISABLE,
+ GPI_UART3_PAD_SIN)>;
+ bias-pull-up;
+ drive-strength = <14>;
+ input-enable;
+ input-schmitt-enable;
+ slew-rate = <0>;
+ };
+ tx-pins {
+ pinmux = <GPIOMUX(14, GPO_UART3_PAD_SOUT,
+ GPO_ENABLE, GPI_NONE)>;
+ bias-disable;
+ drive-strength = <35>;
+ input-disable;
+ input-schmitt-disable;
+ slew-rate = <0>;
+ };
+ };
+};
+
+&i2c0 {
+ clock-frequency = <100000>;
+ i2c-sda-hold-time-ns = <300>;
+ i2c-sda-falling-time-ns = <500>;
+ i2c-scl-falling-time-ns = <500>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&i2c0_pins>;
+ status = "okay";
+
+ pmic@5e {
+ compatible = "ti,tps65086";
+ reg = <0x5e>;
+ gpio-controller;
+ #gpio-cells = <2>;
+
+ regulators {
+ };
+ };
+};
+
+&i2c1 {
+ clock-frequency = <400000>;
+ i2c-sda-hold-time-ns = <300>;
+ i2c-sda-falling-time-ns = <100>;
+ i2c-scl-falling-time-ns = <100>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&i2c1_pins>;
+ status = "okay";
+};
+
+&i2c2 {
+ clock-frequency = <100000>;
+ i2c-sda-hold-time-ns = <300>;
+ i2c-sda-falling-time-ns = <500>;
+ i2c-scl-falling-time-ns = <500>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&i2c2_pins>;
+ status = "okay";
+};
+
+&osc_sys {
+ clock-frequency = <25000000>;
+};
+
+&osc_aud {
+ clock-frequency = <27000000>;
+};
+
+&uart3 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&uart3_pins>;
+ status = "okay";
+};
--
2.33.1
On Tue, Nov 16, 2021 at 5:06 PM Emil Renner Berthing <[email protected]> wrote:
>
> Add a combined pinctrl and GPIO driver for the JH7100 RISC-V SoC by
> StarFive Ltd. This is a test chip for their upcoming JH7110 SoC, which
> is said to feature only minor changes to these pinctrl/GPIO parts.
>
> For each "GPIO" there are two registers for configuring the output and
> output enable signals which may come from other peripherals. Among these
> are two special signals that are constant 0 and constant 1 respectively.
> Controlling the GPIOs from software is done by choosing one of these
> signals. In other words the same registers are used for both pin muxing
> and controlling the GPIOs, which makes it easier to combine the pinctrl
> and GPIO driver in one.
>
> I wrote the pinconf and pinmux parts, but the GPIO part of the code is
> based on the GPIO driver in the vendor tree written by Huan Feng with
> cleanups and fixes by Drew and me.
I could bikeshed more, but currently it's in a good enough shape, no need.
Only one thing that I would like to point out is the uncertainty on
what the driver
actually should do on a series of pin configurations (currently it
skips all of the same kind but last). So, this is just heads up and I
don't won't to block the submission, hence
Reviewed-by: Andy Shevchenko <[email protected]>
(Note, that in theory the series of pin configurations may come outside of DT)
> Datasheet: https://github.com/starfive-tech/JH7100_Docs/blob/main/JH7100%20Data%20Sheet%20V01.01.04-EN%20(4-21-2021).pdf
> Co-developed-by: Huan Feng <[email protected]>
> Signed-off-by: Huan Feng <[email protected]>
> Signed-off-by: Emil Renner Berthing <[email protected]>
> Co-developed-by: Drew Fustini <[email protected]>
> Signed-off-by: Drew Fustini <[email protected]>
> ---
> MAINTAINERS | 8 +
> drivers/pinctrl/Kconfig | 17 +
> drivers/pinctrl/Makefile | 1 +
> drivers/pinctrl/pinctrl-starfive.c | 1354 ++++++++++++++++++++++++++++
> 4 files changed, 1380 insertions(+)
> create mode 100644 drivers/pinctrl/pinctrl-starfive.c
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 1152f5d94690..30d6842969e7 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -18137,6 +18137,14 @@ F: Documentation/devicetree/bindings/clock/starfive,jh7100-clkgen.yaml
> F: drivers/clk/starfive/clk-starfive-jh7100.c
> F: include/dt-bindings/clock/starfive-jh7100.h
>
> +STARFIVE JH7100 PINCTRL DRIVER
> +M: Emil Renner Berthing <[email protected]>
> +L: [email protected]
> +S: Maintained
> +F: Documentation/devicetree/bindings/pinctrl/starfive,jh7100-pinctrl.yaml
> +F: drivers/pinctrl/pinctrl-starfive.c
> +F: include/dt-bindings/pinctrl/pinctrl-starfive.h
> +
> STARFIVE JH7100 RESET CONTROLLER DRIVER
> M: Emil Renner Berthing <[email protected]>
> S: Maintained
> diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
> index 6a961d5f8726..0d5b61e4c21e 100644
> --- a/drivers/pinctrl/Kconfig
> +++ b/drivers/pinctrl/Kconfig
> @@ -281,6 +281,23 @@ config PINCTRL_ST
> select PINCONF
> select GPIOLIB_IRQCHIP
>
> +config PINCTRL_STARFIVE
> + tristate "Pinctrl and GPIO driver for the StarFive JH7100 SoC"
> + depends on SOC_STARFIVE || COMPILE_TEST
> + depends on OF
> + default SOC_STARFIVE
> + select GENERIC_PINCTRL_GROUPS
> + select GENERIC_PINMUX_FUNCTIONS
> + select GENERIC_PINCONF
> + select GPIOLIB
> + select GPIOLIB_IRQCHIP
> + select OF_GPIO
> + help
> + Say yes here to support pin control on the StarFive JH7100 SoC.
> + This also provides an interface to the GPIO pins not used by other
> + peripherals supporting inputs, outputs, configuring pull-up/pull-down
> + and interrupts on input changes.
> +
> config PINCTRL_STMFX
> tristate "STMicroelectronics STMFX GPIO expander pinctrl driver"
> depends on I2C
> diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
> index 5e63de2ffcf4..f5bdd6b209a6 100644
> --- a/drivers/pinctrl/Makefile
> +++ b/drivers/pinctrl/Makefile
> @@ -39,6 +39,7 @@ obj-$(CONFIG_PINCTRL_LANTIQ) += pinctrl-lantiq.o
> obj-$(CONFIG_PINCTRL_LPC18XX) += pinctrl-lpc18xx.o
> obj-$(CONFIG_PINCTRL_TB10X) += pinctrl-tb10x.o
> obj-$(CONFIG_PINCTRL_ST) += pinctrl-st.o
> +obj-$(CONFIG_PINCTRL_STARFIVE) += pinctrl-starfive.o
> obj-$(CONFIG_PINCTRL_STMFX) += pinctrl-stmfx.o
> obj-$(CONFIG_PINCTRL_ZYNQ) += pinctrl-zynq.o
> obj-$(CONFIG_PINCTRL_ZYNQMP) += pinctrl-zynqmp.o
> diff --git a/drivers/pinctrl/pinctrl-starfive.c b/drivers/pinctrl/pinctrl-starfive.c
> new file mode 100644
> index 000000000000..0b912152a405
> --- /dev/null
> +++ b/drivers/pinctrl/pinctrl-starfive.c
> @@ -0,0 +1,1354 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Pinctrl / GPIO driver for StarFive JH7100 SoC
> + *
> + * Copyright (C) 2020 Shanghai StarFive Technology Co., Ltd.
> + * Copyright (C) 2021 Emil Renner Berthing <[email protected]>
> + */
> +
> +#include <linux/bits.h>
> +#include <linux/clk.h>
> +#include <linux/gpio/driver.h>
> +#include <linux/io.h>
> +#include <linux/mod_devicetable.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/platform_device.h>
> +#include <linux/reset.h>
> +#include <linux/spinlock.h>
> +
> +#include <linux/pinctrl/pinctrl.h>
> +#include <linux/pinctrl/pinmux.h>
> +
> +#include <dt-bindings/pinctrl/pinctrl-starfive.h>
> +
> +#include "core.h"
> +#include "pinctrl-utils.h"
> +#include "pinmux.h"
> +#include "pinconf.h"
> +
> +#define DRIVER_NAME "pinctrl-starfive"
> +
> +/*
> + * Refer to Section 12. GPIO Registers in the JH7100 data sheet:
> + * https://github.com/starfive-tech/JH7100_Docs
> + */
> +#define NR_GPIOS 64
> +
> +/*
> + * Global enable for GPIO interrupts. If bit 0 is set to 1 the GPIO interrupts
> + * are enabled. If set to 0 the GPIO interrupts are disabled.
> + */
> +#define GPIOEN 0x000
> +
> +/*
> + * The following 32-bit registers come in pairs, but only the offset of the
> + * first register is defined. The first controls (interrupts for) GPIO 0-31 and
> + * the second GPIO 32-63.
> + */
> +
> +/*
> + * Interrupt Type. If set to 1 the interrupt is edge-triggered. If set to 0 the
> + * interrupt is level-triggered.
> + */
> +#define GPIOIS 0x010
> +
> +/*
> + * Edge-Trigger Interrupt Type. If set to 1 the interrupt gets triggered on
> + * both positive and negative edges. If set to 0 the interrupt is triggered by a
> + * single edge.
> + */
> +#define GPIOIBE 0x018
> +
> +/*
> + * Interrupt Trigger Polarity. If set to 1 the interrupt is triggered on a
> + * rising edge (edge-triggered) or high level (level-triggered). If set to 0 the
> + * interrupt is triggered on a falling edge (edge-triggered) or low level
> + * (level-triggered).
> + */
> +#define GPIOIEV 0x020
> +
> +/*
> + * Interrupt Mask. If set to 1 the interrupt is enabled (unmasked). If set to 0
> + * the interrupt is disabled (masked). Note that the current documentation is
> + * wrong and says the exct opposite of this.
> + */
> +#define GPIOIE 0x028
> +
> +/*
> + * Clear Edge-Triggered Interrupts. Write a 1 to clear the edge-triggered
> + * interrupt.
> + */
> +#define GPIOIC 0x030
> +
> +/*
> + * Edge-Triggered Interrupt Status. A 1 means the configured edge was detected.
> + */
> +#define GPIORIS 0x038
> +
> +/*
> + * Interrupt Status after Masking. A 1 means the configured edge or level was
> + * detected and not masked.
> + */
> +#define GPIOMIS 0x040
> +
> +/*
> + * Data Value. Dynamically reflects the value of the GPIO pin. If 1 the pin is
> + * a digital 1 and if 0 the pin is a digital 0.
> + */
> +#define GPIODIN 0x048
> +
> +/*
> + * From the data sheet section 12.2, there are 64 32-bit output data registers
> + * and 64 output enable registers. Output data and output enable registers for
> + * a given GPIO are contiguous. Eg. GPO0_DOUT_CFG is 0x50 and GPO0_DOEN_CFG is
> + * 0x54 while GPO1_DOUT_CFG is 0x58 and GPO1_DOEN_CFG is 0x5c. The stride
> + * between GPIO registers is effectively 8, thus: GPOn_DOUT_CFG is 0x50 + 8n
> + * and GPOn_DOEN_CFG is 0x54 + 8n.
> + */
> +#define GPON_DOUT_CFG 0x050
> +#define GPON_DOEN_CFG 0x054
> +
> +/*
> + * From Section 12.3, there are 75 input signal configuration registers which
> + * are 4 bytes wide starting with GPI_CPU_JTAG_TCK_CFG at 0x250 and ending with
> + * GPI_USB_OVER_CURRENT_CFG 0x378
> + */
> +#define GPI_CFG_OFFSET 0x250
> +
> +/*
> + * Pad Control Bits. There are 16 pad control bits for each pin located in 103
> + * 32-bit registers controlling PAD_GPIO[0] to PAD_GPIO[63] followed by
> + * PAD_FUNC_SHARE[0] to PAD_FUNC_SHARE[141]. Odd numbered pins use the upper 16
> + * bit of each register.
> + */
> +#define PAD_SLEW_RATE_MASK GENMASK(11, 9)
> +#define PAD_SLEW_RATE_POS 9
> +#define PAD_BIAS_STRONG_PULL_UP BIT(8)
> +#define PAD_INPUT_ENABLE BIT(7)
> +#define PAD_INPUT_SCHMITT_ENABLE BIT(6)
> +#define PAD_BIAS_DISABLE BIT(5)
> +#define PAD_BIAS_PULL_DOWN BIT(4)
> +#define PAD_BIAS_MASK \
> + (PAD_BIAS_STRONG_PULL_UP | \
> + PAD_BIAS_DISABLE | \
> + PAD_BIAS_PULL_DOWN)
> +#define PAD_DRIVE_STRENGTH_MASK GENMASK(3, 0)
> +#define PAD_DRIVE_STRENGTH_POS 0
> +
> +/*
> + * From Section 11, the IO_PADSHARE_SEL register can be programmed to select
> + * one of seven pre-defined multiplexed signal groups on PAD_FUNC_SHARE and
> + * PAD_GPIO pads. This is a global setting.
> + */
> +#define IO_PADSHARE_SEL 0x1a0
> +
> +/*
> + * This just needs to be some number such that when
> + * sfp->gpio.pin_base = PAD_INVALID_GPIO then
> + * starfive_pin_to_gpio(sfp, validpin) is never a valid GPIO number.
> + * That is it should underflow and return something >= NR_GPIOS.
> + */
> +#define PAD_INVALID_GPIO 0x10000
> +
> +/*
> + * The packed pinmux values from the device tree look like this:
> + *
> + * | 31 - 24 | 23 - 16 | 15 - 8 | 7 | 6 | 5 - 0 |
> + * | dout | doen | din | dout rev | doen rev | gpio nr |
> + *
> + * ..but the GPOn_DOUT_CFG and GPOn_DOEN_CFG registers look like this:
> + *
> + * | 31 | 30 - 8 | 7 - 0 |
> + * | dout/doen rev | unused | dout/doen |
> + */
> +static unsigned int starfive_pinmux_to_gpio(u32 v)
> +{
> + return v & (NR_GPIOS - 1);
> +}
> +
> +static u32 starfive_pinmux_to_dout(u32 v)
> +{
> + return ((v & BIT(7)) << (31 - 7)) | ((v >> 24) & GENMASK(7, 0));
> +}
> +
> +static u32 starfive_pinmux_to_doen(u32 v)
> +{
> + return ((v & BIT(6)) << (31 - 6)) | ((v >> 16) & GENMASK(7, 0));
> +}
> +
> +static u32 starfive_pinmux_to_din(u32 v)
> +{
> + return (v >> 8) & GENMASK(7, 0);
> +}
> +
> +/*
> + * The maximum GPIO output current depends on the chosen drive strength:
> + *
> + * DS: 0 1 2 3 4 5 6 7
> + * mA: 14.2 21.2 28.2 35.2 42.2 49.1 56.0 62.8
> + *
> + * After rounding that is 7*DS + 14 mA
> + */
> +static u32 starfive_drive_strength_to_max_mA(u16 ds)
> +{
> + return 7 * ds + 14;
> +}
> +
> +static u16 starfive_drive_strength_from_max_mA(u32 i)
> +{
> + return (clamp(i, 14U, 63U) - 14) / 7;
> +}
> +
> +struct starfive_pinctrl {
> + struct gpio_chip gc;
> + struct pinctrl_gpio_range gpios;
> + raw_spinlock_t lock;
> + void __iomem *base;
> + void __iomem *padctl;
> + struct pinctrl_dev *pctl;
> +};
> +
> +static inline unsigned int starfive_pin_to_gpio(const struct starfive_pinctrl *sfp,
> + unsigned int pin)
> +{
> + return pin - sfp->gpios.pin_base;
> +}
> +
> +static inline unsigned int starfive_gpio_to_pin(const struct starfive_pinctrl *sfp,
> + unsigned int gpio)
> +{
> + return sfp->gpios.pin_base + gpio;
> +}
> +
> +static struct starfive_pinctrl *starfive_from_irq_data(struct irq_data *d)
> +{
> + struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
> +
> + return container_of(gc, struct starfive_pinctrl, gc);
> +}
> +
> +static struct starfive_pinctrl *starfive_from_irq_desc(struct irq_desc *desc)
> +{
> + struct gpio_chip *gc = irq_desc_get_handler_data(desc);
> +
> + return container_of(gc, struct starfive_pinctrl, gc);
> +}
> +
> +static const struct pinctrl_pin_desc starfive_pins[] = {
> + PINCTRL_PIN(PAD_GPIO(0), "GPIO[0]"),
> + PINCTRL_PIN(PAD_GPIO(1), "GPIO[1]"),
> + PINCTRL_PIN(PAD_GPIO(2), "GPIO[2]"),
> + PINCTRL_PIN(PAD_GPIO(3), "GPIO[3]"),
> + PINCTRL_PIN(PAD_GPIO(4), "GPIO[4]"),
> + PINCTRL_PIN(PAD_GPIO(5), "GPIO[5]"),
> + PINCTRL_PIN(PAD_GPIO(6), "GPIO[6]"),
> + PINCTRL_PIN(PAD_GPIO(7), "GPIO[7]"),
> + PINCTRL_PIN(PAD_GPIO(8), "GPIO[8]"),
> + PINCTRL_PIN(PAD_GPIO(9), "GPIO[9]"),
> + PINCTRL_PIN(PAD_GPIO(10), "GPIO[10]"),
> + PINCTRL_PIN(PAD_GPIO(11), "GPIO[11]"),
> + PINCTRL_PIN(PAD_GPIO(12), "GPIO[12]"),
> + PINCTRL_PIN(PAD_GPIO(13), "GPIO[13]"),
> + PINCTRL_PIN(PAD_GPIO(14), "GPIO[14]"),
> + PINCTRL_PIN(PAD_GPIO(15), "GPIO[15]"),
> + PINCTRL_PIN(PAD_GPIO(16), "GPIO[16]"),
> + PINCTRL_PIN(PAD_GPIO(17), "GPIO[17]"),
> + PINCTRL_PIN(PAD_GPIO(18), "GPIO[18]"),
> + PINCTRL_PIN(PAD_GPIO(19), "GPIO[19]"),
> + PINCTRL_PIN(PAD_GPIO(20), "GPIO[20]"),
> + PINCTRL_PIN(PAD_GPIO(21), "GPIO[21]"),
> + PINCTRL_PIN(PAD_GPIO(22), "GPIO[22]"),
> + PINCTRL_PIN(PAD_GPIO(23), "GPIO[23]"),
> + PINCTRL_PIN(PAD_GPIO(24), "GPIO[24]"),
> + PINCTRL_PIN(PAD_GPIO(25), "GPIO[25]"),
> + PINCTRL_PIN(PAD_GPIO(26), "GPIO[26]"),
> + PINCTRL_PIN(PAD_GPIO(27), "GPIO[27]"),
> + PINCTRL_PIN(PAD_GPIO(28), "GPIO[28]"),
> + PINCTRL_PIN(PAD_GPIO(29), "GPIO[29]"),
> + PINCTRL_PIN(PAD_GPIO(30), "GPIO[30]"),
> + PINCTRL_PIN(PAD_GPIO(31), "GPIO[31]"),
> + PINCTRL_PIN(PAD_GPIO(32), "GPIO[32]"),
> + PINCTRL_PIN(PAD_GPIO(33), "GPIO[33]"),
> + PINCTRL_PIN(PAD_GPIO(34), "GPIO[34]"),
> + PINCTRL_PIN(PAD_GPIO(35), "GPIO[35]"),
> + PINCTRL_PIN(PAD_GPIO(36), "GPIO[36]"),
> + PINCTRL_PIN(PAD_GPIO(37), "GPIO[37]"),
> + PINCTRL_PIN(PAD_GPIO(38), "GPIO[38]"),
> + PINCTRL_PIN(PAD_GPIO(39), "GPIO[39]"),
> + PINCTRL_PIN(PAD_GPIO(40), "GPIO[40]"),
> + PINCTRL_PIN(PAD_GPIO(41), "GPIO[41]"),
> + PINCTRL_PIN(PAD_GPIO(42), "GPIO[42]"),
> + PINCTRL_PIN(PAD_GPIO(43), "GPIO[43]"),
> + PINCTRL_PIN(PAD_GPIO(44), "GPIO[44]"),
> + PINCTRL_PIN(PAD_GPIO(45), "GPIO[45]"),
> + PINCTRL_PIN(PAD_GPIO(46), "GPIO[46]"),
> + PINCTRL_PIN(PAD_GPIO(47), "GPIO[47]"),
> + PINCTRL_PIN(PAD_GPIO(48), "GPIO[48]"),
> + PINCTRL_PIN(PAD_GPIO(49), "GPIO[49]"),
> + PINCTRL_PIN(PAD_GPIO(50), "GPIO[50]"),
> + PINCTRL_PIN(PAD_GPIO(51), "GPIO[51]"),
> + PINCTRL_PIN(PAD_GPIO(52), "GPIO[52]"),
> + PINCTRL_PIN(PAD_GPIO(53), "GPIO[53]"),
> + PINCTRL_PIN(PAD_GPIO(54), "GPIO[54]"),
> + PINCTRL_PIN(PAD_GPIO(55), "GPIO[55]"),
> + PINCTRL_PIN(PAD_GPIO(56), "GPIO[56]"),
> + PINCTRL_PIN(PAD_GPIO(57), "GPIO[57]"),
> + PINCTRL_PIN(PAD_GPIO(58), "GPIO[58]"),
> + PINCTRL_PIN(PAD_GPIO(59), "GPIO[59]"),
> + PINCTRL_PIN(PAD_GPIO(60), "GPIO[60]"),
> + PINCTRL_PIN(PAD_GPIO(61), "GPIO[61]"),
> + PINCTRL_PIN(PAD_GPIO(62), "GPIO[62]"),
> + PINCTRL_PIN(PAD_GPIO(63), "GPIO[63]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(0), "FUNC_SHARE[0]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(1), "FUNC_SHARE[1]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(2), "FUNC_SHARE[2]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(3), "FUNC_SHARE[3]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(4), "FUNC_SHARE[4]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(5), "FUNC_SHARE[5]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(6), "FUNC_SHARE[6]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(7), "FUNC_SHARE[7]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(8), "FUNC_SHARE[8]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(9), "FUNC_SHARE[9]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(10), "FUNC_SHARE[10]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(11), "FUNC_SHARE[11]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(12), "FUNC_SHARE[12]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(13), "FUNC_SHARE[13]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(14), "FUNC_SHARE[14]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(15), "FUNC_SHARE[15]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(16), "FUNC_SHARE[16]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(17), "FUNC_SHARE[17]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(18), "FUNC_SHARE[18]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(19), "FUNC_SHARE[19]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(20), "FUNC_SHARE[20]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(21), "FUNC_SHARE[21]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(22), "FUNC_SHARE[22]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(23), "FUNC_SHARE[23]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(24), "FUNC_SHARE[24]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(25), "FUNC_SHARE[25]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(26), "FUNC_SHARE[26]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(27), "FUNC_SHARE[27]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(28), "FUNC_SHARE[28]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(29), "FUNC_SHARE[29]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(30), "FUNC_SHARE[30]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(31), "FUNC_SHARE[31]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(32), "FUNC_SHARE[32]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(33), "FUNC_SHARE[33]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(34), "FUNC_SHARE[34]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(35), "FUNC_SHARE[35]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(36), "FUNC_SHARE[36]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(37), "FUNC_SHARE[37]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(38), "FUNC_SHARE[38]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(39), "FUNC_SHARE[39]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(40), "FUNC_SHARE[40]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(41), "FUNC_SHARE[41]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(42), "FUNC_SHARE[42]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(43), "FUNC_SHARE[43]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(44), "FUNC_SHARE[44]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(45), "FUNC_SHARE[45]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(46), "FUNC_SHARE[46]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(47), "FUNC_SHARE[47]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(48), "FUNC_SHARE[48]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(49), "FUNC_SHARE[49]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(50), "FUNC_SHARE[50]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(51), "FUNC_SHARE[51]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(52), "FUNC_SHARE[52]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(53), "FUNC_SHARE[53]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(54), "FUNC_SHARE[54]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(55), "FUNC_SHARE[55]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(56), "FUNC_SHARE[56]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(57), "FUNC_SHARE[57]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(58), "FUNC_SHARE[58]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(59), "FUNC_SHARE[59]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(60), "FUNC_SHARE[60]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(61), "FUNC_SHARE[61]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(62), "FUNC_SHARE[62]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(63), "FUNC_SHARE[63]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(64), "FUNC_SHARE[64]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(65), "FUNC_SHARE[65]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(66), "FUNC_SHARE[66]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(67), "FUNC_SHARE[67]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(68), "FUNC_SHARE[68]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(69), "FUNC_SHARE[69]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(70), "FUNC_SHARE[70]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(71), "FUNC_SHARE[71]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(72), "FUNC_SHARE[72]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(73), "FUNC_SHARE[73]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(74), "FUNC_SHARE[74]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(75), "FUNC_SHARE[75]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(76), "FUNC_SHARE[76]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(77), "FUNC_SHARE[77]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(78), "FUNC_SHARE[78]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(79), "FUNC_SHARE[79]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(80), "FUNC_SHARE[80]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(81), "FUNC_SHARE[81]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(82), "FUNC_SHARE[82]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(83), "FUNC_SHARE[83]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(84), "FUNC_SHARE[84]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(85), "FUNC_SHARE[85]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(86), "FUNC_SHARE[86]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(87), "FUNC_SHARE[87]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(88), "FUNC_SHARE[88]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(89), "FUNC_SHARE[89]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(90), "FUNC_SHARE[90]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(91), "FUNC_SHARE[91]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(92), "FUNC_SHARE[92]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(93), "FUNC_SHARE[93]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(94), "FUNC_SHARE[94]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(95), "FUNC_SHARE[95]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(96), "FUNC_SHARE[96]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(97), "FUNC_SHARE[97]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(98), "FUNC_SHARE[98]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(99), "FUNC_SHARE[99]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(100), "FUNC_SHARE[100]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(101), "FUNC_SHARE[101]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(102), "FUNC_SHARE[102]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(103), "FUNC_SHARE[103]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(104), "FUNC_SHARE[104]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(105), "FUNC_SHARE[105]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(106), "FUNC_SHARE[106]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(107), "FUNC_SHARE[107]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(108), "FUNC_SHARE[108]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(109), "FUNC_SHARE[109]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(110), "FUNC_SHARE[110]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(111), "FUNC_SHARE[111]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(112), "FUNC_SHARE[112]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(113), "FUNC_SHARE[113]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(114), "FUNC_SHARE[114]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(115), "FUNC_SHARE[115]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(116), "FUNC_SHARE[116]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(117), "FUNC_SHARE[117]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(118), "FUNC_SHARE[118]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(119), "FUNC_SHARE[119]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(120), "FUNC_SHARE[120]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(121), "FUNC_SHARE[121]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(122), "FUNC_SHARE[122]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(123), "FUNC_SHARE[123]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(124), "FUNC_SHARE[124]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(125), "FUNC_SHARE[125]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(126), "FUNC_SHARE[126]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(127), "FUNC_SHARE[127]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(128), "FUNC_SHARE[128]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(129), "FUNC_SHARE[129]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(130), "FUNC_SHARE[130]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(131), "FUNC_SHARE[131]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(132), "FUNC_SHARE[132]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(133), "FUNC_SHARE[133]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(134), "FUNC_SHARE[134]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(135), "FUNC_SHARE[135]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(136), "FUNC_SHARE[136]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(137), "FUNC_SHARE[137]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(138), "FUNC_SHARE[138]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(139), "FUNC_SHARE[139]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(140), "FUNC_SHARE[140]"),
> + PINCTRL_PIN(PAD_FUNC_SHARE(141), "FUNC_SHARE[141]"),
> +};
> +
> +#ifdef CONFIG_DEBUG_FS
> +static void starfive_pin_dbg_show(struct pinctrl_dev *pctldev,
> + struct seq_file *s,
> + unsigned int pin)
> +{
> + struct starfive_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev);
> + unsigned int gpio = starfive_pin_to_gpio(sfp, pin);
> + void __iomem *reg;
> + u32 dout, doen;
> +
> + if (gpio >= NR_GPIOS)
> + return;
> +
> + reg = sfp->base + GPON_DOUT_CFG + 8 * gpio;
> + dout = readl_relaxed(reg + 0x000);
> + doen = readl_relaxed(reg + 0x004);
> +
> + seq_printf(s, "dout=%lu%s doen=%lu%s",
> + dout & GENMASK(7, 0), (dout & BIT(31)) ? "r" : "",
> + doen & GENMASK(7, 0), (doen & BIT(31)) ? "r" : "");
> +}
> +#else
> +#define starfive_pin_dbg_show NULL
> +#endif
> +
> +static int starfive_dt_node_to_map(struct pinctrl_dev *pctldev,
> + struct device_node *np,
> + struct pinctrl_map **maps,
> + unsigned int *num_maps)
> +{
> + struct starfive_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev);
> + struct device *dev = sfp->gc.parent;
> + struct device_node *child;
> + struct pinctrl_map *map;
> + const char **pgnames;
> + const char *grpname;
> + u32 *pinmux;
> + int ngroups;
> + int *pins;
> + int nmaps;
> + int ret;
> +
> + nmaps = 0;
> + ngroups = 0;
> + for_each_child_of_node(np, child) {
> + int npinmux = of_property_count_u32_elems(child, "pinmux");
> + int npins = of_property_count_u32_elems(child, "pins");
> +
> + if (npinmux > 0 && npins > 0) {
> + dev_err(dev, "invalid pinctrl group %pOFn.%pOFn: both pinmux and pins set\n",
> + np, child);
> + of_node_put(child);
> + return -EINVAL;
> + }
> + if (npinmux == 0 && npins == 0) {
> + dev_err(dev, "invalid pinctrl group %pOFn.%pOFn: neither pinmux nor pins set\n",
> + np, child);
> + of_node_put(child);
> + return -EINVAL;
> + }
> +
> + if (npinmux > 0)
> + nmaps += 2;
> + else
> + nmaps += 1;
> + ngroups += 1;
> + }
> +
> + pgnames = devm_kcalloc(dev, ngroups, sizeof(*pgnames), GFP_KERNEL);
> + if (!pgnames)
> + return -ENOMEM;
> +
> + map = kcalloc(nmaps, sizeof(*map), GFP_KERNEL);
> + if (!map)
> + return -ENOMEM;
> +
> + nmaps = 0;
> + ngroups = 0;
> + for_each_child_of_node(np, child) {
> + int npins;
> + int i;
> +
> + grpname = devm_kasprintf(dev, GFP_KERNEL, "%pOFn.%pOFn", np, child);
> + if (!grpname) {
> + ret = -ENOMEM;
> + goto put_child;
> + }
> +
> + pgnames[ngroups++] = grpname;
> +
> + if ((npins = of_property_count_u32_elems(child, "pinmux")) > 0) {
> + pins = devm_kcalloc(dev, npins, sizeof(*pins), GFP_KERNEL);
> + if (!pins) {
> + ret = -ENOMEM;
> + goto put_child;
> + }
> +
> + pinmux = devm_kcalloc(dev, npins, sizeof(*pinmux), GFP_KERNEL);
> + if (!pinmux) {
> + ret = -ENOMEM;
> + goto put_child;
> + }
> +
> + ret = of_property_read_u32_array(child, "pinmux", pinmux, npins);
> + if (ret)
> + goto put_child;
> +
> + for (i = 0; i < npins; i++) {
> + unsigned int gpio = starfive_pinmux_to_gpio(pinmux[i]);
> +
> + pins[i] = starfive_gpio_to_pin(sfp, gpio);
> + }
> +
> + map[nmaps].type = PIN_MAP_TYPE_MUX_GROUP;
> + map[nmaps].data.mux.function = np->name;
> + map[nmaps].data.mux.group = grpname;
> + nmaps += 1;
> + } else if ((npins = of_property_count_u32_elems(child, "pins")) > 0) {
> + pins = devm_kcalloc(dev, npins, sizeof(*pins), GFP_KERNEL);
> + if (!pins) {
> + ret = -ENOMEM;
> + goto put_child;
> + }
> +
> + pinmux = NULL;
> +
> + for (i = 0; i < npins; i++) {
> + u32 v;
> +
> + ret = of_property_read_u32_index(child, "pins", i, &v);
> + if (ret)
> + goto put_child;
> + pins[i] = v;
> + }
> + } else {
> + ret = -EINVAL;
> + goto put_child;
> + }
> +
> + ret = pinctrl_generic_add_group(pctldev, grpname, pins, npins, pinmux);
> + if (ret < 0) {
> + dev_err(dev, "error adding group %s: %d\n", grpname, ret);
> + goto put_child;
> + }
> +
> + ret = pinconf_generic_parse_dt_config(child, pctldev,
> + &map[nmaps].data.configs.configs,
> + &map[nmaps].data.configs.num_configs);
> + if (ret) {
> + dev_err(dev, "error parsing pin config of group %s: %d\n",
> + grpname, ret);
> + goto put_child;
> + }
> +
> + /* don't create a map if there are no pinconf settings */
> + if (map[nmaps].data.configs.num_configs == 0)
> + continue;
> +
> + map[nmaps].type = PIN_MAP_TYPE_CONFIGS_GROUP;
> + map[nmaps].data.configs.group_or_pin = grpname;
> + nmaps += 1;
> + }
> +
> + ret = pinmux_generic_add_function(pctldev, np->name, pgnames, ngroups, NULL);
> + if (ret < 0) {
> + dev_err(dev, "error adding function %s: %d\n", np->name, ret);
> + goto free_map;
> + }
> +
> + *maps = map;
> + *num_maps = nmaps;
> + return 0;
> +
> +put_child:
> + of_node_put(child);
> +free_map:
> + pinctrl_utils_free_map(pctldev, map, nmaps);
> + return ret;
> +}
> +
> +static const struct pinctrl_ops starfive_pinctrl_ops = {
> + .get_groups_count = pinctrl_generic_get_group_count,
> + .get_group_name = pinctrl_generic_get_group_name,
> + .get_group_pins = pinctrl_generic_get_group_pins,
> + .pin_dbg_show = starfive_pin_dbg_show,
> + .dt_node_to_map = starfive_dt_node_to_map,
> + .dt_free_map = pinctrl_utils_free_map,
> +};
> +
> +static int starfive_set_mux(struct pinctrl_dev *pctldev,
> + unsigned int fsel, unsigned int gsel)
> +{
> + struct starfive_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev);
> + struct device *dev = sfp->gc.parent;
> + const struct group_desc *group;
> + const u32 *pinmux;
> + unsigned int i;
> +
> + group = pinctrl_generic_get_group(pctldev, gsel);
> + if (!group)
> + return -EINVAL;
> +
> + pinmux = group->data;
> + for (i = 0; i < group->num_pins; i++) {
> + u32 v = pinmux[i];
> + unsigned int gpio = starfive_pinmux_to_gpio(v);
> + u32 dout = starfive_pinmux_to_dout(v);
> + u32 doen = starfive_pinmux_to_doen(v);
> + u32 din = starfive_pinmux_to_din(v);
> + void __iomem *reg_dout;
> + void __iomem *reg_doen;
> + void __iomem *reg_din;
> + unsigned long flags;
> +
> + dev_dbg(dev, "GPIO%u: dout=0x%x doen=0x%x din=0x%x\n",
> + gpio, dout, doen, din);
> +
> + reg_dout = sfp->base + GPON_DOUT_CFG + 8 * gpio;
> + reg_doen = sfp->base + GPON_DOEN_CFG + 8 * gpio;
> + if (din != GPI_NONE)
> + reg_din = sfp->base + GPI_CFG_OFFSET + 4 * din;
> + else
> + reg_din = NULL;
> +
> + raw_spin_lock_irqsave(&sfp->lock, flags);
> + writel_relaxed(dout, reg_dout);
> + writel_relaxed(doen, reg_doen);
> + if (reg_din)
> + writel_relaxed(gpio + 2, reg_din);
> + raw_spin_unlock_irqrestore(&sfp->lock, flags);
> + }
> +
> + return 0;
> +}
> +
> +static const struct pinmux_ops starfive_pinmux_ops = {
> + .get_functions_count = pinmux_generic_get_function_count,
> + .get_function_name = pinmux_generic_get_function_name,
> + .get_function_groups = pinmux_generic_get_function_groups,
> + .set_mux = starfive_set_mux,
> + .strict = true,
> +};
> +
> +static u16 starfive_padctl_get(struct starfive_pinctrl *sfp,
> + unsigned int pin)
> +{
> + void __iomem *reg = sfp->padctl + 4 * (pin / 2);
> + int shift = 16 * (pin % 2);
> +
> + return readl_relaxed(reg) >> shift;
> +}
> +
> +static void starfive_padctl_rmw(struct starfive_pinctrl *sfp,
> + unsigned int pin,
> + u16 _mask, u16 _value)
> +{
> + void __iomem *reg = sfp->padctl + 4 * (pin / 2);
> + int shift = 16 * (pin % 2);
> + u32 mask = (u32)_mask << shift;
> + u32 value = (u32)_value << shift;
> + unsigned long flags;
> +
> + dev_dbg(sfp->gc.parent, "padctl_rmw(%u, 0x%03x, 0x%03x)\n", pin, _mask, _value);
> +
> + raw_spin_lock_irqsave(&sfp->lock, flags);
> + value |= readl_relaxed(reg) & ~mask;
> + writel_relaxed(value, reg);
> + raw_spin_unlock_irqrestore(&sfp->lock, flags);
> +}
> +
> +#define PIN_CONFIG_STARFIVE_STRONG_PULL_UP (PIN_CONFIG_END + 1)
> +
> +static const struct pinconf_generic_params starfive_pinconf_custom_params[] = {
> + { "starfive,strong-pull-up", PIN_CONFIG_STARFIVE_STRONG_PULL_UP, 1 },
> +};
> +
> +#ifdef CONFIG_DEBUG_FS
> +static const struct pin_config_item starfive_pinconf_custom_conf_items[] = {
> + PCONFDUMP(PIN_CONFIG_STARFIVE_STRONG_PULL_UP, "input bias strong pull-up", NULL, false),
> +};
> +
> +static_assert(ARRAY_SIZE(starfive_pinconf_custom_conf_items) ==
> + ARRAY_SIZE(starfive_pinconf_custom_params));
> +#else
> +#define starfive_pinconf_custom_conf_items NULL
> +#endif
> +
> +static int starfive_pinconf_get(struct pinctrl_dev *pctldev,
> + unsigned int pin, unsigned long *config)
> +{
> + struct starfive_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev);
> + int param = pinconf_to_config_param(*config);
> + u16 value = starfive_padctl_get(sfp, pin);
> + bool enabled;
> + u32 arg;
> +
> + switch (param) {
> + case PIN_CONFIG_BIAS_DISABLE:
> + enabled = value & PAD_BIAS_DISABLE;
> + arg = 0;
> + break;
> + case PIN_CONFIG_BIAS_PULL_DOWN:
> + enabled = value & PAD_BIAS_PULL_DOWN;
> + arg = 1;
> + break;
> + case PIN_CONFIG_BIAS_PULL_UP:
> + enabled = !(value & PAD_BIAS_MASK);
> + arg = 1;
> + break;
> + case PIN_CONFIG_DRIVE_STRENGTH:
> + enabled = value & PAD_DRIVE_STRENGTH_MASK;
> + arg = starfive_drive_strength_to_max_mA(value & PAD_DRIVE_STRENGTH_MASK);
> + break;
> + case PIN_CONFIG_INPUT_ENABLE:
> + enabled = value & PAD_INPUT_ENABLE;
> + arg = enabled;
> + break;
> + case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
> + enabled = value & PAD_INPUT_SCHMITT_ENABLE;
> + arg = enabled;
> + break;
> + case PIN_CONFIG_SLEW_RATE:
> + enabled = value & PAD_SLEW_RATE_MASK;
> + arg = (value & PAD_SLEW_RATE_MASK) >> PAD_SLEW_RATE_POS;
> + break;
> + case PIN_CONFIG_STARFIVE_STRONG_PULL_UP:
> + enabled = value & PAD_BIAS_STRONG_PULL_UP;
> + arg = enabled;
> + break;
> + default:
> + return -ENOTSUPP;
> + }
> +
> + *config = pinconf_to_config_packed(param, arg);
> + return enabled ? 0 : -EINVAL;
> +}
> +
> +static int starfive_pinconf_group_get(struct pinctrl_dev *pctldev,
> + unsigned int gsel, unsigned long *config)
> +{
> + const struct group_desc *group;
> +
> + group = pinctrl_generic_get_group(pctldev, gsel);
> + if (!group)
> + return -EINVAL;
> +
> + return starfive_pinconf_get(pctldev, group->pins[0], config);
> +}
> +
> +static int starfive_pinconf_group_set(struct pinctrl_dev *pctldev,
> + unsigned int gsel,
> + unsigned long *configs,
> + unsigned int num_configs)
> +{
> + struct starfive_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev);
> + const struct group_desc *group;
> + u16 mask, value;
> + int i;
> +
> + group = pinctrl_generic_get_group(pctldev, gsel);
> + if (!group)
> + return -EINVAL;
> +
> + mask = 0;
> + value = 0;
> + for (i = 0; i < num_configs; i++) {
> + int param = pinconf_to_config_param(configs[i]);
> + u32 arg = pinconf_to_config_argument(configs[i]);
> +
> + switch (param) {
> + case PIN_CONFIG_BIAS_DISABLE:
> + mask |= PAD_BIAS_MASK;
> + value = (value & ~PAD_BIAS_MASK) | PAD_BIAS_DISABLE;
> + break;
> + case PIN_CONFIG_BIAS_PULL_DOWN:
> + if (arg == 0)
> + return -ENOTSUPP;
> + mask |= PAD_BIAS_MASK;
> + value = (value & ~PAD_BIAS_MASK) | PAD_BIAS_PULL_DOWN;
> + break;
> + case PIN_CONFIG_BIAS_PULL_UP:
> + if (arg == 0)
> + return -ENOTSUPP;
> + mask |= PAD_BIAS_MASK;
> + value = value & ~PAD_BIAS_MASK;
> + break;
> + case PIN_CONFIG_DRIVE_STRENGTH:
> + mask |= PAD_DRIVE_STRENGTH_MASK;
> + value = (value & ~PAD_DRIVE_STRENGTH_MASK) |
> + starfive_drive_strength_from_max_mA(arg);
> + break;
> + case PIN_CONFIG_INPUT_ENABLE:
> + mask |= PAD_INPUT_ENABLE;
> + if (arg)
> + value |= PAD_INPUT_ENABLE;
> + else
> + value &= ~PAD_INPUT_ENABLE;
> + break;
> + case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
> + mask |= PAD_INPUT_SCHMITT_ENABLE;
> + if (arg)
> + value |= PAD_INPUT_SCHMITT_ENABLE;
> + else
> + value &= ~PAD_INPUT_SCHMITT_ENABLE;
> + break;
> + case PIN_CONFIG_SLEW_RATE:
> + mask |= PAD_SLEW_RATE_MASK;
> + value = (value & ~PAD_SLEW_RATE_MASK) |
> + ((arg << PAD_SLEW_RATE_POS) & PAD_SLEW_RATE_MASK);
> + break;
> + case PIN_CONFIG_STARFIVE_STRONG_PULL_UP:
> + if (arg) {
> + mask |= PAD_BIAS_MASK;
> + value = (value & ~PAD_BIAS_MASK) |
> + PAD_BIAS_STRONG_PULL_UP;
> + } else {
> + mask |= PAD_BIAS_STRONG_PULL_UP;
> + value = value & ~PAD_BIAS_STRONG_PULL_UP;
> + }
> + break;
> + default:
> + return -ENOTSUPP;
> + }
> + }
> +
> + for (i = 0; i < group->num_pins; i++)
> + starfive_padctl_rmw(sfp, group->pins[i], mask, value);
> +
> + return 0;
> +}
> +
> +#ifdef CONFIG_DEBUG_FS
> +static void starfive_pinconf_dbg_show(struct pinctrl_dev *pctldev,
> + struct seq_file *s, unsigned int pin)
> +{
> + struct starfive_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev);
> + u16 value = starfive_padctl_get(sfp, pin);
> +
> + seq_printf(s, " (0x%03x)", value);
> +}
> +#else
> +#define starfive_pinconf_dbg_show NULL
> +#endif
> +
> +static const struct pinconf_ops starfive_pinconf_ops = {
> + .pin_config_get = starfive_pinconf_get,
> + .pin_config_group_get = starfive_pinconf_group_get,
> + .pin_config_group_set = starfive_pinconf_group_set,
> + .pin_config_dbg_show = starfive_pinconf_dbg_show,
> + .is_generic = true,
> +};
> +
> +static struct pinctrl_desc starfive_desc = {
> + .name = DRIVER_NAME,
> + .pins = starfive_pins,
> + .npins = ARRAY_SIZE(starfive_pins),
> + .pctlops = &starfive_pinctrl_ops,
> + .pmxops = &starfive_pinmux_ops,
> + .confops = &starfive_pinconf_ops,
> + .owner = THIS_MODULE,
> + .num_custom_params = ARRAY_SIZE(starfive_pinconf_custom_params),
> + .custom_params = starfive_pinconf_custom_params,
> + .custom_conf_items = starfive_pinconf_custom_conf_items,
> +};
> +
> +static int starfive_gpio_request(struct gpio_chip *gc, unsigned int gpio)
> +{
> + return pinctrl_gpio_request(gc->base + gpio);
> +}
> +
> +static void starfive_gpio_free(struct gpio_chip *gc, unsigned int gpio)
> +{
> + pinctrl_gpio_free(gc->base + gpio);
> +}
> +
> +static int starfive_gpio_get_direction(struct gpio_chip *gc, unsigned int gpio)
> +{
> + struct starfive_pinctrl *sfp = container_of(gc, struct starfive_pinctrl, gc);
> + void __iomem *doen = sfp->base + GPON_DOEN_CFG + 8 * gpio;
> +
> + if (readl_relaxed(doen) == GPO_ENABLE)
> + return GPIO_LINE_DIRECTION_OUT;
> +
> + return GPIO_LINE_DIRECTION_IN;
> +}
> +
> +static int starfive_gpio_direction_input(struct gpio_chip *gc,
> + unsigned int gpio)
> +{
> + struct starfive_pinctrl *sfp = container_of(gc, struct starfive_pinctrl, gc);
> + void __iomem *doen = sfp->base + GPON_DOEN_CFG + 8 * gpio;
> + unsigned long flags;
> +
> + /* enable input and schmitt trigger */
> + starfive_padctl_rmw(sfp, starfive_gpio_to_pin(sfp, gpio),
> + PAD_INPUT_ENABLE | PAD_INPUT_SCHMITT_ENABLE,
> + PAD_INPUT_ENABLE | PAD_INPUT_SCHMITT_ENABLE);
> +
> + raw_spin_lock_irqsave(&sfp->lock, flags);
> + writel_relaxed(GPO_DISABLE, doen);
> + raw_spin_unlock_irqrestore(&sfp->lock, flags);
> + return 0;
> +}
> +
> +static int starfive_gpio_direction_output(struct gpio_chip *gc,
> + unsigned int gpio, int value)
> +{
> + struct starfive_pinctrl *sfp = container_of(gc, struct starfive_pinctrl, gc);
> + void __iomem *dout = sfp->base + GPON_DOUT_CFG + 8 * gpio;
> + void __iomem *doen = sfp->base + GPON_DOEN_CFG + 8 * gpio;
> + unsigned long flags;
> +
> + raw_spin_lock_irqsave(&sfp->lock, flags);
> + writel_relaxed(value, dout);
> + writel_relaxed(GPO_ENABLE, doen);
> + raw_spin_unlock_irqrestore(&sfp->lock, flags);
> +
> + /* disable input, schmitt trigger and bias */
> + starfive_padctl_rmw(sfp, starfive_gpio_to_pin(sfp, gpio),
> + PAD_BIAS_MASK | PAD_INPUT_ENABLE | PAD_INPUT_SCHMITT_ENABLE,
> + PAD_BIAS_DISABLE);
> +
> + return 0;
> +}
> +
> +static int starfive_gpio_get(struct gpio_chip *gc, unsigned int gpio)
> +{
> + struct starfive_pinctrl *sfp = container_of(gc, struct starfive_pinctrl, gc);
> + void __iomem *din = sfp->base + GPIODIN + 4 * (gpio / 32);
> +
> + return !!(readl_relaxed(din) & BIT(gpio % 32));
> +}
> +
> +static void starfive_gpio_set(struct gpio_chip *gc, unsigned int gpio,
> + int value)
> +{
> + struct starfive_pinctrl *sfp = container_of(gc, struct starfive_pinctrl, gc);
> + void __iomem *dout = sfp->base + GPON_DOUT_CFG + 8 * gpio;
> + unsigned long flags;
> +
> + raw_spin_lock_irqsave(&sfp->lock, flags);
> + writel_relaxed(value, dout);
> + raw_spin_unlock_irqrestore(&sfp->lock, flags);
> +}
> +
> +static int starfive_gpio_set_config(struct gpio_chip *gc, unsigned int gpio,
> + unsigned long config)
> +{
> + struct starfive_pinctrl *sfp = container_of(gc, struct starfive_pinctrl, gc);
> + u32 arg = pinconf_to_config_argument(config);
> + u16 value;
> + u16 mask;
> +
> + switch (pinconf_to_config_param(config)) {
> + case PIN_CONFIG_BIAS_DISABLE:
> + mask = PAD_BIAS_MASK;
> + value = PAD_BIAS_DISABLE;
> + break;
> + case PIN_CONFIG_BIAS_PULL_DOWN:
> + if (arg == 0)
> + return -ENOTSUPP;
> + mask = PAD_BIAS_MASK;
> + value = PAD_BIAS_PULL_DOWN;
> + break;
> + case PIN_CONFIG_BIAS_PULL_UP:
> + if (arg == 0)
> + return -ENOTSUPP;
> + mask = PAD_BIAS_MASK;
> + value = 0;
> + break;
> + case PIN_CONFIG_DRIVE_PUSH_PULL:
> + return 0;
> + case PIN_CONFIG_INPUT_ENABLE:
> + mask = PAD_INPUT_ENABLE;
> + value = arg ? PAD_INPUT_ENABLE : 0;
> + break;
> + case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
> + mask = PAD_INPUT_SCHMITT_ENABLE;
> + value = arg ? PAD_INPUT_SCHMITT_ENABLE : 0;
> + break;
> + default:
> + return -ENOTSUPP;
> + };
> +
> + starfive_padctl_rmw(sfp, starfive_gpio_to_pin(sfp, gpio), mask, value);
> + return 0;
> +}
> +
> +static int starfive_gpio_add_pin_ranges(struct gpio_chip *gc)
> +{
> + struct starfive_pinctrl *sfp = container_of(gc, struct starfive_pinctrl, gc);
> +
> + sfp->gpios.name = sfp->gc.label;
> + sfp->gpios.base = sfp->gc.base;
> + /*
> + * sfp->gpios.pin_base depends on the chosen signal group
> + * and is set in starfive_probe()
> + */
> + sfp->gpios.npins = NR_GPIOS;
> + sfp->gpios.gc = &sfp->gc;
> + pinctrl_add_gpio_range(sfp->pctl, &sfp->gpios);
> + return 0;
> +}
> +
> +static void starfive_irq_ack(struct irq_data *d)
> +{
> + struct starfive_pinctrl *sfp = starfive_from_irq_data(d);
> + irq_hw_number_t gpio = irqd_to_hwirq(d);
> + void __iomem *ic = sfp->base + GPIOIC + 4 * (gpio / 32);
> + u32 mask = BIT(gpio % 32);
> + unsigned long flags;
> +
> + raw_spin_lock_irqsave(&sfp->lock, flags);
> + writel_relaxed(mask, ic);
> + raw_spin_unlock_irqrestore(&sfp->lock, flags);
> +}
> +
> +static void starfive_irq_mask(struct irq_data *d)
> +{
> + struct starfive_pinctrl *sfp = starfive_from_irq_data(d);
> + irq_hw_number_t gpio = irqd_to_hwirq(d);
> + void __iomem *ie = sfp->base + GPIOIE + 4 * (gpio / 32);
> + u32 mask = BIT(gpio % 32);
> + unsigned long flags;
> + u32 value;
> +
> + raw_spin_lock_irqsave(&sfp->lock, flags);
> + value = readl_relaxed(ie) & ~mask;
> + writel_relaxed(value, ie);
> + raw_spin_unlock_irqrestore(&sfp->lock, flags);
> +}
> +
> +static void starfive_irq_mask_ack(struct irq_data *d)
> +{
> + struct starfive_pinctrl *sfp = starfive_from_irq_data(d);
> + irq_hw_number_t gpio = irqd_to_hwirq(d);
> + void __iomem *ie = sfp->base + GPIOIE + 4 * (gpio / 32);
> + void __iomem *ic = sfp->base + GPIOIC + 4 * (gpio / 32);
> + u32 mask = BIT(gpio % 32);
> + unsigned long flags;
> + u32 value;
> +
> + raw_spin_lock_irqsave(&sfp->lock, flags);
> + value = readl_relaxed(ie) & ~mask;
> + writel_relaxed(value, ie);
> + writel_relaxed(mask, ic);
> + raw_spin_unlock_irqrestore(&sfp->lock, flags);
> +}
> +
> +static void starfive_irq_unmask(struct irq_data *d)
> +{
> + struct starfive_pinctrl *sfp = starfive_from_irq_data(d);
> + irq_hw_number_t gpio = irqd_to_hwirq(d);
> + void __iomem *ie = sfp->base + GPIOIE + 4 * (gpio / 32);
> + u32 mask = BIT(gpio % 32);
> + unsigned long flags;
> + u32 value;
> +
> + raw_spin_lock_irqsave(&sfp->lock, flags);
> + value = readl_relaxed(ie) | mask;
> + writel_relaxed(value, ie);
> + raw_spin_unlock_irqrestore(&sfp->lock, flags);
> +}
> +
> +static int starfive_irq_set_type(struct irq_data *d, unsigned int trigger)
> +{
> + struct starfive_pinctrl *sfp = starfive_from_irq_data(d);
> + irq_hw_number_t gpio = irqd_to_hwirq(d);
> + void __iomem *base = sfp->base + 4 * (gpio / 32);
> + u32 mask = BIT(gpio % 32);
> + u32 irq_type, edge_both, polarity;
> + unsigned long flags;
> +
> + switch (trigger) {
> + case IRQ_TYPE_EDGE_RISING:
> + irq_type = mask; /* 1: edge triggered */
> + edge_both = 0; /* 0: single edge */
> + polarity = mask; /* 1: rising edge */
> + break;
> + case IRQ_TYPE_EDGE_FALLING:
> + irq_type = mask; /* 1: edge triggered */
> + edge_both = 0; /* 0: single edge */
> + polarity = 0; /* 0: falling edge */
> + break;
> + case IRQ_TYPE_EDGE_BOTH:
> + irq_type = mask; /* 1: edge triggered */
> + edge_both = mask; /* 1: both edges */
> + polarity = 0; /* 0: ignored */
> + break;
> + case IRQ_TYPE_LEVEL_HIGH:
> + irq_type = 0; /* 0: level triggered */
> + edge_both = 0; /* 0: ignored */
> + polarity = mask; /* 1: high level */
> + break;
> + case IRQ_TYPE_LEVEL_LOW:
> + irq_type = 0; /* 0: level triggered */
> + edge_both = 0; /* 0: ignored */
> + polarity = 0; /* 0: low level */
> + break;
> + default:
> + return -EINVAL;
> + }
> +
> + if (trigger & IRQ_TYPE_EDGE_BOTH)
> + irq_set_handler_locked(d, handle_edge_irq);
> + else
> + irq_set_handler_locked(d, handle_level_irq);
> +
> + raw_spin_lock_irqsave(&sfp->lock, flags);
> + irq_type |= readl_relaxed(base + GPIOIS) & ~mask;
> + writel_relaxed(irq_type, base + GPIOIS);
> + edge_both |= readl_relaxed(base + GPIOIBE) & ~mask;
> + writel_relaxed(edge_both, base + GPIOIBE);
> + polarity |= readl_relaxed(base + GPIOIEV) & ~mask;
> + writel_relaxed(polarity, base + GPIOIEV);
> + raw_spin_unlock_irqrestore(&sfp->lock, flags);
> + return 0;
> +}
> +
> +static struct irq_chip starfive_irq_chip = {
> + .irq_ack = starfive_irq_ack,
> + .irq_mask = starfive_irq_mask,
> + .irq_mask_ack = starfive_irq_mask_ack,
> + .irq_unmask = starfive_irq_unmask,
> + .irq_set_type = starfive_irq_set_type,
> + .flags = IRQCHIP_SET_TYPE_MASKED,
> +};
> +
> +static void starfive_gpio_irq_handler(struct irq_desc *desc)
> +{
> + struct starfive_pinctrl *sfp = starfive_from_irq_desc(desc);
> + struct irq_chip *chip = irq_desc_get_chip(desc);
> + unsigned long mis;
> + unsigned int pin;
> +
> + chained_irq_enter(chip, desc);
> +
> + mis = readl_relaxed(sfp->base + GPIOMIS + 0);
> + for_each_set_bit(pin, &mis, 32)
> + generic_handle_domain_irq(sfp->gc.irq.domain, pin);
> +
> + mis = readl_relaxed(sfp->base + GPIOMIS + 4);
> + for_each_set_bit(pin, &mis, 32)
> + generic_handle_domain_irq(sfp->gc.irq.domain, pin + 32);
> +
> + chained_irq_exit(chip, desc);
> +}
> +
> +static int starfive_gpio_init_hw(struct gpio_chip *gc)
> +{
> + struct starfive_pinctrl *sfp = container_of(gc, struct starfive_pinctrl, gc);
> +
> + /* mask all GPIO interrupts */
> + writel(0, sfp->base + GPIOIE + 0);
> + writel(0, sfp->base + GPIOIE + 4);
> + /* clear edge interrupt flags */
> + writel(~0U, sfp->base + GPIOIC + 0);
> + writel(~0U, sfp->base + GPIOIC + 4);
> + /* enable GPIO interrupts */
> + writel(1, sfp->base + GPIOEN);
> + return 0;
> +}
> +
> +static void starfive_disable_clock(void *data)
> +{
> + clk_disable_unprepare(data);
> +}
> +
> +static int starfive_probe(struct platform_device *pdev)
> +{
> + struct device *dev = &pdev->dev;
> + struct starfive_pinctrl *sfp;
> + struct reset_control *rst;
> + struct clk *clk;
> + u32 value;
> + int ret;
> +
> + sfp = devm_kzalloc(dev, sizeof(*sfp), GFP_KERNEL);
> + if (!sfp)
> + return -ENOMEM;
> +
> + sfp->base = devm_platform_ioremap_resource_byname(pdev, "gpio");
> + if (IS_ERR(sfp->base))
> + return PTR_ERR(sfp->base);
> +
> + sfp->padctl = devm_platform_ioremap_resource_byname(pdev, "padctl");
> + if (IS_ERR(sfp->padctl))
> + return PTR_ERR(sfp->padctl);
> +
> + clk = devm_clk_get(dev, NULL);
> + if (IS_ERR(clk))
> + return dev_err_probe(dev, PTR_ERR(clk), "could not get clock\n");
> +
> + rst = devm_reset_control_get_exclusive(dev, NULL);
> + if (IS_ERR(rst))
> + return dev_err_probe(dev, PTR_ERR(rst), "could not get reset\n");
> +
> + ret = clk_prepare_enable(clk);
> + if (ret)
> + return dev_err_probe(dev, ret, "could not enable clock\n");
> +
> + ret = devm_add_action_or_reset(dev, starfive_disable_clock, clk);
> + if (ret)
> + return ret;
> +
> + /*
> + * We don't want to assert reset and risk undoing pin muxing for the
> + * early boot serial console, but let's make sure the reset line is
> + * deasserted in case someone runs a really minimal bootloader.
> + */
> + ret = reset_control_deassert(rst);
> + if (ret)
> + return dev_err_probe(dev, ret, "could not deassert reset\n");
> +
> + platform_set_drvdata(pdev, sfp);
> + sfp->gc.parent = dev;
> + raw_spin_lock_init(&sfp->lock);
> +
> + ret = devm_pinctrl_register_and_init(dev, &starfive_desc, sfp, &sfp->pctl);
> + if (ret)
> + return dev_err_probe(dev, ret, "could not register pinctrl driver\n");
> +
> + if (!of_property_read_u32(dev->of_node, "starfive,signal-group", &value)) {
> + if (value > 6)
> + return dev_err_probe(dev, -EINVAL, "invalid signal group %u\n", value);
> + writel(value, sfp->padctl + IO_PADSHARE_SEL);
> + }
> +
> + value = readl(sfp->padctl + IO_PADSHARE_SEL);
> + switch (value) {
> + case 0:
> + sfp->gpios.pin_base = PAD_INVALID_GPIO;
> + goto out_pinctrl_enable;
> + case 1:
> + sfp->gpios.pin_base = PAD_GPIO(0);
> + break;
> + case 2:
> + sfp->gpios.pin_base = PAD_FUNC_SHARE(72);
> + break;
> + case 3:
> + sfp->gpios.pin_base = PAD_FUNC_SHARE(70);
> + break;
> + case 4: case 5: case 6:
> + sfp->gpios.pin_base = PAD_FUNC_SHARE(0);
> + break;
> + default:
> + return dev_err_probe(dev, -EINVAL, "invalid signal group %u\n", value);
> + }
> +
> + sfp->gc.label = dev_name(dev);
> + sfp->gc.owner = THIS_MODULE;
> + sfp->gc.request = starfive_gpio_request;
> + sfp->gc.free = starfive_gpio_free;
> + sfp->gc.get_direction = starfive_gpio_get_direction;
> + sfp->gc.direction_input = starfive_gpio_direction_input;
> + sfp->gc.direction_output = starfive_gpio_direction_output;
> + sfp->gc.get = starfive_gpio_get;
> + sfp->gc.set = starfive_gpio_set;
> + sfp->gc.set_config = starfive_gpio_set_config;
> + sfp->gc.add_pin_ranges = starfive_gpio_add_pin_ranges;
> + sfp->gc.base = -1;
> + sfp->gc.ngpio = NR_GPIOS;
> +
> + starfive_irq_chip.parent_device = dev;
> + starfive_irq_chip.name = sfp->gc.label;
> +
> + sfp->gc.irq.chip = &starfive_irq_chip;
> + sfp->gc.irq.parent_handler = starfive_gpio_irq_handler;
> + sfp->gc.irq.num_parents = 1;
> + sfp->gc.irq.parents = devm_kcalloc(dev, sfp->gc.irq.num_parents,
> + sizeof(*sfp->gc.irq.parents), GFP_KERNEL);
> + if (!sfp->gc.irq.parents)
> + return -ENOMEM;
> + sfp->gc.irq.default_type = IRQ_TYPE_NONE;
> + sfp->gc.irq.handler = handle_bad_irq;
> + sfp->gc.irq.init_hw = starfive_gpio_init_hw;
> +
> + ret = platform_get_irq(pdev, 0);
> + if (ret < 0)
> + return ret;
> + sfp->gc.irq.parents[0] = ret;
> +
> + ret = devm_gpiochip_add_data(dev, &sfp->gc, sfp);
> + if (ret)
> + return dev_err_probe(dev, ret, "could not register gpiochip\n");
> +
> +out_pinctrl_enable:
> + return pinctrl_enable(sfp->pctl);
> +}
> +
> +static const struct of_device_id starfive_of_match[] = {
> + { .compatible = "starfive,jh7100-pinctrl" },
> + { /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, starfive_of_match);
> +
> +static struct platform_driver starfive_pinctrl_driver = {
> + .probe = starfive_probe,
> + .driver = {
> + .name = DRIVER_NAME,
> + .of_match_table = starfive_of_match,
> + },
> +};
> +module_platform_driver(starfive_pinctrl_driver);
> +
> +MODULE_DESCRIPTION("Pinctrl driver for StarFive SoCs");
> +MODULE_AUTHOR("Emil Renner Berthing <[email protected]>");
> +MODULE_LICENSE("GPL v2");
> --
> 2.33.1
>
--
With Best Regards,
Andy Shevchenko
On Tue, Nov 16, 2021 at 5:06 PM Emil Renner Berthing <[email protected]> wrote:
>
> Add a driver for the StarFive JH7100 reset controller.
Thanks!
Couple of minor remarks below and take my
Reviewed-by: Andy Shevchenko <[email protected]>
> Signed-off-by: Emil Renner Berthing <[email protected]>
> ---
> MAINTAINERS | 7 +
> drivers/reset/Kconfig | 7 +
> drivers/reset/Makefile | 1 +
> drivers/reset/reset-starfive-jh7100.c | 176 ++++++++++++++++++++++++++
> 4 files changed, 191 insertions(+)
> create mode 100644 drivers/reset/reset-starfive-jh7100.c
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 2548ef1f8246..1152f5d94690 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -18137,6 +18137,13 @@ F: Documentation/devicetree/bindings/clock/starfive,jh7100-clkgen.yaml
> F: drivers/clk/starfive/clk-starfive-jh7100.c
> F: include/dt-bindings/clock/starfive-jh7100.h
>
> +STARFIVE JH7100 RESET CONTROLLER DRIVER
> +M: Emil Renner Berthing <[email protected]>
> +S: Maintained
> +F: Documentation/devicetree/bindings/reset/starfive,jh7100-reset.yaml
> +F: drivers/reset/reset-starfive-jh7100.c
> +F: include/dt-bindings/reset/starfive-jh7100.h
> +
> STATIC BRANCH/CALL
> M: Peter Zijlstra <[email protected]>
> M: Josh Poimboeuf <[email protected]>
> diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig
> index 85024eb1d2ea..6f8ba0ddc05f 100644
> --- a/drivers/reset/Kconfig
> +++ b/drivers/reset/Kconfig
> @@ -224,6 +224,13 @@ config RESET_SOCFPGA
> This enables the reset driver for the SoCFPGA ARMv7 platforms. This
> driver gets initialized early during platform init calls.
>
> +config RESET_STARFIVE_JH7100
> + bool "StarFive JH7100 Reset Driver"
> + depends on SOC_STARFIVE || COMPILE_TEST
> + default SOC_STARFIVE
> + help
> + This enables the reset controller driver for the StarFive JH7100 SoC.
> +
> config RESET_SUNXI
> bool "Allwinner SoCs Reset Driver" if COMPILE_TEST && !ARCH_SUNXI
> default ARCH_SUNXI
> diff --git a/drivers/reset/Makefile b/drivers/reset/Makefile
> index 21d46d8869ff..bd0a97be18b5 100644
> --- a/drivers/reset/Makefile
> +++ b/drivers/reset/Makefile
> @@ -29,6 +29,7 @@ obj-$(CONFIG_RESET_RZG2L_USBPHY_CTRL) += reset-rzg2l-usbphy-ctrl.o
> obj-$(CONFIG_RESET_SCMI) += reset-scmi.o
> obj-$(CONFIG_RESET_SIMPLE) += reset-simple.o
> obj-$(CONFIG_RESET_SOCFPGA) += reset-socfpga.o
> +obj-$(CONFIG_RESET_STARFIVE_JH7100) += reset-starfive-jh7100.o
> obj-$(CONFIG_RESET_SUNXI) += reset-sunxi.o
> obj-$(CONFIG_RESET_TI_SCI) += reset-ti-sci.o
> obj-$(CONFIG_RESET_TI_SYSCON) += reset-ti-syscon.o
> diff --git a/drivers/reset/reset-starfive-jh7100.c b/drivers/reset/reset-starfive-jh7100.c
> new file mode 100644
> index 000000000000..2f7615cbf1dc
> --- /dev/null
> +++ b/drivers/reset/reset-starfive-jh7100.c
> @@ -0,0 +1,176 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +/*
> + * Reset driver for the StarFive JH7100 SoC
> + *
> + * Copyright (C) 2021 Emil Renner Berthing <[email protected]>
> + */
> +
> +#include <linux/bitmap.h>
> +#include <linux/io.h>
> +#include <linux/iopoll.h>
> +#include <linux/mod_devicetable.h>
> +#include <linux/platform_device.h>
> +#include <linux/reset-controller.h>
> +#include <linux/spinlock.h>
> +
> +#include <dt-bindings/reset/starfive-jh7100.h>
> +
> +/* register offsets */
> +#define JH7100_RESET_ASSERT0 0x00
> +#define JH7100_RESET_ASSERT1 0x04
> +#define JH7100_RESET_ASSERT2 0x08
> +#define JH7100_RESET_ASSERT3 0x0c
> +#define JH7100_RESET_STATUS0 0x10
> +#define JH7100_RESET_STATUS1 0x14
> +#define JH7100_RESET_STATUS2 0x18
> +#define JH7100_RESET_STATUS3 0x1c
> +#if BITS_PER_LONG == 64
> +#define jh7100_reset_read readq
> +#define jh7100_reset_write writeq
> +#else
> +#define jh7100_reset_read readl
> +#define jh7100_reset_write writel
> +#endif
No need, just use always readq() / writeq() and include io-64-nonatomic-lo-hi
> +/*
> + * Writing a 1 to the n'th bit of the m'th ASSERT register asserts
> + * line 32m + n, and writing a 0 deasserts the same line.
> + * Most reset lines have their status inverted so a 0 bit in the STATUS
> + * register means the line is asserted and a 1 means it's deasserted. A few
> + * lines don't though, so store the expected value of the status registers when
> + * all lines are asserted.
> + */
> +static const DECLARE_BITMAP(jh7100_reset_asserted, 4 * 32) = {
> + BITMAP_FROM_U64(BIT_ULL_MASK(JH7100_RST_U74) |
> + BIT_ULL_MASK(JH7100_RST_VP6_DRESET) |
> + BIT_ULL_MASK(JH7100_RST_VP6_BRESET) |
> + BIT_ULL_MASK(JH7100_RST_HIFI4_DRESET) |
> + BIT_ULL_MASK(JH7100_RST_HIFI4_BRESET)),
> + BITMAP_FROM_U64(BIT_ULL_MASK(JH7100_RST_E24)),
> +};
> +
> +struct jh7100_reset {
> + struct reset_controller_dev rcdev;
> + /* protect registers against concurrent read-modify-write */
> + spinlock_t lock;
> + void __iomem *base;
> +};
> +
> +static inline struct jh7100_reset *
> +jh7100_reset_from(struct reset_controller_dev *rcdev)
> +{
> + return container_of(rcdev, struct jh7100_reset, rcdev);
> +}
> +
> +static int jh7100_reset_update(struct reset_controller_dev *rcdev,
> + unsigned long id, bool assert)
> +{
> + struct jh7100_reset *data = jh7100_reset_from(rcdev);
> + unsigned long offset = id / BITS_PER_LONG;
> + void __iomem *reg_assert = data->base + JH7100_RESET_ASSERT0 + offset * sizeof(long);
> + void __iomem *reg_status = data->base + JH7100_RESET_STATUS0 + offset * sizeof(long);
> + unsigned long mask = BIT_MASK(id);
It's better to group offset and mask, so it will give a hint to human
and compiler that
'/' + '%' can be optimized to one assembly instructions on some
architectures (in case of compile-test or new RISC-V types, I dunno if
they have it now).
And use BIT_WORD() for offset calculation. Same for the above function.
> + unsigned long done = jh7100_reset_asserted[offset] & mask;
> + unsigned long value;
> + unsigned long flags;
> + int ret;
> +
> + if (!assert)
> + done ^= mask;
> +
> + spin_lock_irqsave(&data->lock, flags);
> +
> + value = jh7100_reset_read(reg_assert);
> + if (assert)
> + value |= mask;
> + else
> + value &= ~mask;
> + jh7100_reset_write(value, reg_assert);
> +
> + /* if the associated clock is gated, deasserting might otherwise hang forever */
> + ret = readx_poll_timeout_atomic(jh7100_reset_read, reg_status, value,
> + (value & mask) == done, 0, 1000);
> +
> + spin_unlock_irqrestore(&data->lock, flags);
> + return ret;
> +}
> +
> +static int jh7100_reset_assert(struct reset_controller_dev *rcdev,
> + unsigned long id)
> +{
> + return jh7100_reset_update(rcdev, id, true);
> +}
> +
> +static int jh7100_reset_deassert(struct reset_controller_dev *rcdev,
> + unsigned long id)
> +{
> + return jh7100_reset_update(rcdev, id, false);
> +}
> +
> +static int jh7100_reset_reset(struct reset_controller_dev *rcdev,
> + unsigned long id)
> +{
> + int ret;
> +
> + ret = jh7100_reset_assert(rcdev, id);
> + if (ret)
> + return ret;
> +
> + return jh7100_reset_deassert(rcdev, id);
> +}
> +
> +static int jh7100_reset_status(struct reset_controller_dev *rcdev,
> + unsigned long id)
> +{
> + struct jh7100_reset *data = jh7100_reset_from(rcdev);
> + unsigned long offset = id / BITS_PER_LONG;
> + void __iomem *reg_status = data->base + JH7100_RESET_STATUS0 + offset * sizeof(long);
> + unsigned long value = jh7100_reset_read(reg_status);
> + unsigned long mask = BIT_MASK(id);
> +
> + return !((value ^ jh7100_reset_asserted[offset]) & mask);
> +}
> +
> +static const struct reset_control_ops jh7100_reset_ops = {
> + .assert = jh7100_reset_assert,
> + .deassert = jh7100_reset_deassert,
> + .reset = jh7100_reset_reset,
> + .status = jh7100_reset_status,
> +};
> +
> +static int __init jh7100_reset_probe(struct platform_device *pdev)
> +{
> + struct jh7100_reset *data;
> +
> + data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
> + if (!data)
> + return -ENOMEM;
> +
> + data->base = devm_platform_ioremap_resource(pdev, 0);
> + if (IS_ERR(data->base))
> + return PTR_ERR(data->base);
> +
> + data->rcdev.ops = &jh7100_reset_ops;
> + data->rcdev.owner = THIS_MODULE;
> + data->rcdev.nr_resets = JH7100_RSTN_END;
> + data->rcdev.dev = &pdev->dev;
> + data->rcdev.of_node = pdev->dev.of_node;
> + spin_lock_init(&data->lock);
> +
> + return devm_reset_controller_register(&pdev->dev, &data->rcdev);
> +}
> +
> +static const struct of_device_id jh7100_reset_dt_ids[] = {
> + { .compatible = "starfive,jh7100-reset" },
> + { /* sentinel */ }
> +};
> +
> +static struct platform_driver jh7100_reset_driver = {
> + .driver = {
> + .name = "jh7100-reset",
> + .of_match_table = jh7100_reset_dt_ids,
> + .suppress_bind_attrs = true,
> + },
> +};
> +builtin_platform_driver_probe(jh7100_reset_driver, jh7100_reset_probe);
> --
> 2.33.1
>
--
With Best Regards,
Andy Shevchenko
On Tue, 16 Nov 2021 at 17:01, Andy Shevchenko <[email protected]> wrote:
> On Tue, Nov 16, 2021 at 5:06 PM Emil Renner Berthing <[email protected]> wrote:
> >
> > Add a driver for the StarFive JH7100 reset controller.
>
> Thanks!
> Couple of minor remarks below and take my
> Reviewed-by: Andy Shevchenko <[email protected]>
Thank you.
> > Signed-off-by: Emil Renner Berthing <[email protected]>
> > ---
> > MAINTAINERS | 7 +
> > drivers/reset/Kconfig | 7 +
> > drivers/reset/Makefile | 1 +
> > drivers/reset/reset-starfive-jh7100.c | 176 ++++++++++++++++++++++++++
> > 4 files changed, 191 insertions(+)
> > create mode 100644 drivers/reset/reset-starfive-jh7100.c
> >
> > diff --git a/MAINTAINERS b/MAINTAINERS
> > index 2548ef1f8246..1152f5d94690 100644
> > --- a/MAINTAINERS
> > +++ b/MAINTAINERS
> > @@ -18137,6 +18137,13 @@ F: Documentation/devicetree/bindings/clock/starfive,jh7100-clkgen.yaml
> > F: drivers/clk/starfive/clk-starfive-jh7100.c
> > F: include/dt-bindings/clock/starfive-jh7100.h
> >
> > +STARFIVE JH7100 RESET CONTROLLER DRIVER
> > +M: Emil Renner Berthing <[email protected]>
> > +S: Maintained
> > +F: Documentation/devicetree/bindings/reset/starfive,jh7100-reset.yaml
> > +F: drivers/reset/reset-starfive-jh7100.c
> > +F: include/dt-bindings/reset/starfive-jh7100.h
> > +
> > STATIC BRANCH/CALL
> > M: Peter Zijlstra <[email protected]>
> > M: Josh Poimboeuf <[email protected]>
> > diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig
> > index 85024eb1d2ea..6f8ba0ddc05f 100644
> > --- a/drivers/reset/Kconfig
> > +++ b/drivers/reset/Kconfig
> > @@ -224,6 +224,13 @@ config RESET_SOCFPGA
> > This enables the reset driver for the SoCFPGA ARMv7 platforms. This
> > driver gets initialized early during platform init calls.
> >
> > +config RESET_STARFIVE_JH7100
> > + bool "StarFive JH7100 Reset Driver"
> > + depends on SOC_STARFIVE || COMPILE_TEST
> > + default SOC_STARFIVE
> > + help
> > + This enables the reset controller driver for the StarFive JH7100 SoC.
> > +
> > config RESET_SUNXI
> > bool "Allwinner SoCs Reset Driver" if COMPILE_TEST && !ARCH_SUNXI
> > default ARCH_SUNXI
> > diff --git a/drivers/reset/Makefile b/drivers/reset/Makefile
> > index 21d46d8869ff..bd0a97be18b5 100644
> > --- a/drivers/reset/Makefile
> > +++ b/drivers/reset/Makefile
> > @@ -29,6 +29,7 @@ obj-$(CONFIG_RESET_RZG2L_USBPHY_CTRL) += reset-rzg2l-usbphy-ctrl.o
> > obj-$(CONFIG_RESET_SCMI) += reset-scmi.o
> > obj-$(CONFIG_RESET_SIMPLE) += reset-simple.o
> > obj-$(CONFIG_RESET_SOCFPGA) += reset-socfpga.o
> > +obj-$(CONFIG_RESET_STARFIVE_JH7100) += reset-starfive-jh7100.o
> > obj-$(CONFIG_RESET_SUNXI) += reset-sunxi.o
> > obj-$(CONFIG_RESET_TI_SCI) += reset-ti-sci.o
> > obj-$(CONFIG_RESET_TI_SYSCON) += reset-ti-syscon.o
> > diff --git a/drivers/reset/reset-starfive-jh7100.c b/drivers/reset/reset-starfive-jh7100.c
> > new file mode 100644
> > index 000000000000..2f7615cbf1dc
> > --- /dev/null
> > +++ b/drivers/reset/reset-starfive-jh7100.c
> > @@ -0,0 +1,176 @@
> > +// SPDX-License-Identifier: GPL-2.0-or-later
> > +/*
> > + * Reset driver for the StarFive JH7100 SoC
> > + *
> > + * Copyright (C) 2021 Emil Renner Berthing <[email protected]>
> > + */
> > +
> > +#include <linux/bitmap.h>
> > +#include <linux/io.h>
> > +#include <linux/iopoll.h>
> > +#include <linux/mod_devicetable.h>
> > +#include <linux/platform_device.h>
> > +#include <linux/reset-controller.h>
> > +#include <linux/spinlock.h>
> > +
> > +#include <dt-bindings/reset/starfive-jh7100.h>
> > +
> > +/* register offsets */
> > +#define JH7100_RESET_ASSERT0 0x00
> > +#define JH7100_RESET_ASSERT1 0x04
> > +#define JH7100_RESET_ASSERT2 0x08
> > +#define JH7100_RESET_ASSERT3 0x0c
> > +#define JH7100_RESET_STATUS0 0x10
> > +#define JH7100_RESET_STATUS1 0x14
> > +#define JH7100_RESET_STATUS2 0x18
> > +#define JH7100_RESET_STATUS3 0x1c
>
> > +#if BITS_PER_LONG == 64
> > +#define jh7100_reset_read readq
> > +#define jh7100_reset_write writeq
> > +#else
> > +#define jh7100_reset_read readl
> > +#define jh7100_reset_write writel
> > +#endif
>
> No need, just use always readq() / writeq() and include io-64-nonatomic-lo-hi
Hmm.. how would that work on a 32bit architecture where sizeof(long)
== 4? The whole point of this is to read chunks in sizes matching the
words in the bitmap later on.
> > +/*
> > + * Writing a 1 to the n'th bit of the m'th ASSERT register asserts
> > + * line 32m + n, and writing a 0 deasserts the same line.
> > + * Most reset lines have their status inverted so a 0 bit in the STATUS
> > + * register means the line is asserted and a 1 means it's deasserted. A few
> > + * lines don't though, so store the expected value of the status registers when
> > + * all lines are asserted.
> > + */
> > +static const DECLARE_BITMAP(jh7100_reset_asserted, 4 * 32) = {
> > + BITMAP_FROM_U64(BIT_ULL_MASK(JH7100_RST_U74) |
> > + BIT_ULL_MASK(JH7100_RST_VP6_DRESET) |
> > + BIT_ULL_MASK(JH7100_RST_VP6_BRESET) |
> > + BIT_ULL_MASK(JH7100_RST_HIFI4_DRESET) |
> > + BIT_ULL_MASK(JH7100_RST_HIFI4_BRESET)),
> > + BITMAP_FROM_U64(BIT_ULL_MASK(JH7100_RST_E24)),
> > +};
> > +
> > +struct jh7100_reset {
> > + struct reset_controller_dev rcdev;
> > + /* protect registers against concurrent read-modify-write */
> > + spinlock_t lock;
> > + void __iomem *base;
> > +};
> > +
> > +static inline struct jh7100_reset *
> > +jh7100_reset_from(struct reset_controller_dev *rcdev)
> > +{
> > + return container_of(rcdev, struct jh7100_reset, rcdev);
> > +}
> > +
> > +static int jh7100_reset_update(struct reset_controller_dev *rcdev,
> > + unsigned long id, bool assert)
> > +{
> > + struct jh7100_reset *data = jh7100_reset_from(rcdev);
> > + unsigned long offset = id / BITS_PER_LONG;
> > + void __iomem *reg_assert = data->base + JH7100_RESET_ASSERT0 + offset * sizeof(long);
> > + void __iomem *reg_status = data->base + JH7100_RESET_STATUS0 + offset * sizeof(long);
> > + unsigned long mask = BIT_MASK(id);
>
> It's better to group offset and mask, so it will give a hint to human
> and compiler that
> '/' + '%' can be optimized to one assembly instructions on some
> architectures (in case of compile-test or new RISC-V types, I dunno if
> they have it now).
>
> And use BIT_WORD() for offset calculation. Same for the above function.
Makes sense. Thanks.
> > + unsigned long done = jh7100_reset_asserted[offset] & mask;
> > + unsigned long value;
> > + unsigned long flags;
> > + int ret;
> > +
> > + if (!assert)
> > + done ^= mask;
> > +
> > + spin_lock_irqsave(&data->lock, flags);
> > +
> > + value = jh7100_reset_read(reg_assert);
> > + if (assert)
> > + value |= mask;
> > + else
> > + value &= ~mask;
> > + jh7100_reset_write(value, reg_assert);
> > +
> > + /* if the associated clock is gated, deasserting might otherwise hang forever */
> > + ret = readx_poll_timeout_atomic(jh7100_reset_read, reg_status, value,
> > + (value & mask) == done, 0, 1000);
> > +
> > + spin_unlock_irqrestore(&data->lock, flags);
> > + return ret;
> > +}
> > +
> > +static int jh7100_reset_assert(struct reset_controller_dev *rcdev,
> > + unsigned long id)
> > +{
> > + return jh7100_reset_update(rcdev, id, true);
> > +}
> > +
> > +static int jh7100_reset_deassert(struct reset_controller_dev *rcdev,
> > + unsigned long id)
> > +{
> > + return jh7100_reset_update(rcdev, id, false);
> > +}
> > +
> > +static int jh7100_reset_reset(struct reset_controller_dev *rcdev,
> > + unsigned long id)
> > +{
> > + int ret;
> > +
> > + ret = jh7100_reset_assert(rcdev, id);
> > + if (ret)
> > + return ret;
> > +
> > + return jh7100_reset_deassert(rcdev, id);
> > +}
> > +
> > +static int jh7100_reset_status(struct reset_controller_dev *rcdev,
> > + unsigned long id)
> > +{
> > + struct jh7100_reset *data = jh7100_reset_from(rcdev);
> > + unsigned long offset = id / BITS_PER_LONG;
> > + void __iomem *reg_status = data->base + JH7100_RESET_STATUS0 + offset * sizeof(long);
> > + unsigned long value = jh7100_reset_read(reg_status);
> > + unsigned long mask = BIT_MASK(id);
> > +
> > + return !((value ^ jh7100_reset_asserted[offset]) & mask);
> > +}
> > +
> > +static const struct reset_control_ops jh7100_reset_ops = {
> > + .assert = jh7100_reset_assert,
> > + .deassert = jh7100_reset_deassert,
> > + .reset = jh7100_reset_reset,
> > + .status = jh7100_reset_status,
> > +};
> > +
> > +static int __init jh7100_reset_probe(struct platform_device *pdev)
> > +{
> > + struct jh7100_reset *data;
> > +
> > + data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
> > + if (!data)
> > + return -ENOMEM;
> > +
> > + data->base = devm_platform_ioremap_resource(pdev, 0);
> > + if (IS_ERR(data->base))
> > + return PTR_ERR(data->base);
> > +
> > + data->rcdev.ops = &jh7100_reset_ops;
> > + data->rcdev.owner = THIS_MODULE;
> > + data->rcdev.nr_resets = JH7100_RSTN_END;
> > + data->rcdev.dev = &pdev->dev;
> > + data->rcdev.of_node = pdev->dev.of_node;
> > + spin_lock_init(&data->lock);
> > +
> > + return devm_reset_controller_register(&pdev->dev, &data->rcdev);
> > +}
> > +
> > +static const struct of_device_id jh7100_reset_dt_ids[] = {
> > + { .compatible = "starfive,jh7100-reset" },
> > + { /* sentinel */ }
> > +};
> > +
> > +static struct platform_driver jh7100_reset_driver = {
> > + .driver = {
> > + .name = "jh7100-reset",
> > + .of_match_table = jh7100_reset_dt_ids,
> > + .suppress_bind_attrs = true,
> > + },
> > +};
> > +builtin_platform_driver_probe(jh7100_reset_driver, jh7100_reset_probe);
> > --
> > 2.33.1
> >
>
>
> --
> With Best Regards,
> Andy Shevchenko
On Tue, Nov 16, 2021 at 4:01 PM Emil Renner Berthing <[email protected]> wrote:
>
> This series adds support for the StarFive JH7100 RISC-V SoC. The SoC has
> many devices that need non-coherent dma operations to work which isn't
> upstream yet[1], so this just adds basic support to boot up, get a
> serial console, blink an LED and reboot itself. Unlike the Allwinner D1
> this chip doesn't use any extra pagetable bits, but instead the DDR RAM
> appears twice in the memory map, with and without the cache.
>
> The JH7100 is a test chip for the upcoming JH7110 and about 300 BeagleV
> Starlight Beta boards were sent out with them as part of a now cancelled
> BeagleBoard.org project. However StarFive has produced more of the
> JH7100s and more boards will be available[2] to buy. I've seen pictures
> of the new boards now, so hopefully before the end of the year.
>
> This series is also available at
> https://github.com/esmil/linux/commits/starlight-minimal
> ..but a more complete kernel including drivers for non-coherent
> peripherals based on this series can be found at
> https://github.com/starfive-tech/linux/tree/visionfive
>
> [1]: https://lore.kernel.org/linux-riscv/[email protected]/
> [2]: https://www.linkedin.com/pulse/starfive-release-open-source-single-board-platform-q3-2021-starfive/
Thanks for adding me to Cc, I've had a look at the series and didn't
see anything
wrong with it, and I'm happy to merge it through the SoC tree for the
initial support
in 5.17, provided you get an Ack from the arch/riscv maintainers for it.
One general (minor) comment about the patches: please put your own
'Signed-off-by'
into the last line of the patch description, below all the lines you
took from other people, so
instead of:
| Signed-off-by: Emil Renner Berthing <[email protected]>
| Reviewed-by: Geert Uytterhoeven <[email protected]>
| Acked-by: Rob Herring <[email protected]>
do this:
| Reviewed-by: Geert Uytterhoeven <[email protected]>
| Acked-by: Rob Herring <[email protected]>
| Signed-off-by: Emil Renner Berthing <[email protected]>
Regarding the coherency issue, it's a bit sad to see yet another hacky
workaround
in the hardware, but as you say this is unrelated to the driver
series. I'd actually
argue that this one isn't that different from the other hack you
describe, except
this steals the pagetable bits from the address instead of the reserved flags...
Arnd
On Tue, Nov 16, 2021 at 6:09 PM Arnd Bergmann <[email protected]> wrote:
> On Tue, Nov 16, 2021 at 4:01 PM Emil Renner Berthing <[email protected]> wrote:
...
> One general (minor) comment about the patches: please put your own
> 'Signed-off-by'
> into the last line of the patch description, below all the lines you
> took from other people, so
> instead of:
>
> | Signed-off-by: Emil Renner Berthing <[email protected]>
> | Reviewed-by: Geert Uytterhoeven <[email protected]>
> | Acked-by: Rob Herring <[email protected]>
>
> do this:
>
> | Reviewed-by: Geert Uytterhoeven <[email protected]>
> | Acked-by: Rob Herring <[email protected]>
> | Signed-off-by: Emil Renner Berthing <[email protected]>
Why?
Submitting Patches tells about chronological order and last SoB to be
from the submitter.
These both are correct. Note the difference between 'last SoB' and
'SoB to be last [line]'.
Here is the excerpt:
"Notably, the last Signed-off-by: must always be that of the developer
submitting the patch."
--
With Best Regards,
Andy Shevchenko
On Tue, Nov 16, 2021 at 6:06 PM Emil Renner Berthing <[email protected]> wrote:
> On Tue, 16 Nov 2021 at 17:01, Andy Shevchenko <[email protected]> wrote:
> > On Tue, Nov 16, 2021 at 5:06 PM Emil Renner Berthing <[email protected]> wrote:
...
> > > +#if BITS_PER_LONG == 64
> > > +#define jh7100_reset_read readq
> > > +#define jh7100_reset_write writeq
> > > +#else
> > > +#define jh7100_reset_read readl
> > > +#define jh7100_reset_write writel
> > > +#endif
> >
> > No need, just use always readq() / writeq() and include io-64-nonatomic-lo-hi
>
> Hmm.. how would that work on a 32bit architecture where sizeof(long)
> == 4? The whole point of this is to read chunks in sizes matching the
> words in the bitmap later on.
Why not? You just put some amendments, see below an example.
...
> > > + void __iomem *reg_assert = data->base + JH7100_RESET_ASSERT0 + offset * sizeof(long);
> > > + void __iomem *reg_status = data->base + JH7100_RESET_STATUS0 + offset * sizeof(long);
> > > + unsigned long value;
void __iomem *reg_assert = data->base + JH7100_RESET_ASSERT0 + off64;
void __iomem *reg_status = data->base + JH7100_RESET_STATUS0 + off64;
u64 value;
> > > + value = jh7100_reset_read(reg_assert);
> > > + if (assert)
> > > + value |= mask;
> > > + else
> > > + value &= ~mask;
> > > + jh7100_reset_write(value, reg_assert);
value = readq(...);
...update...
writeq(value, ...);
> > > + /* if the associated clock is gated, deasserting might otherwise hang forever */
> > > + ret = readx_poll_timeout_atomic(jh7100_reset_read, reg_status, value,
> > > + (value & mask) == done, 0, 1000);
readq_poll_timeout_atomic()
Maybe at the end of the day simple use of u64 will be better than bitmap.
Up to you, you have got the idea. Either way you may put my tag.
--
With Best Regards,
Andy Shevchenko
On Tue, Nov 16, 2021 at 6:21 PM Andy Shevchenko
<[email protected]> wrote:
> On Tue, Nov 16, 2021 at 6:06 PM Emil Renner Berthing <[email protected]> wrote:
> > On Tue, 16 Nov 2021 at 17:01, Andy Shevchenko <[email protected]> wrote:
> > > On Tue, Nov 16, 2021 at 5:06 PM Emil Renner Berthing <[email protected]> wrote:
> Maybe at the end of the day simple use of u64 will be better than bitmap.
> Up to you, you have got the idea. Either way you may put my tag.
At least I see pros of the current solution that it won't read more
registers than needed.
P.S. And do not add that guy to the Cc list, I think people are
already annoyed by bounces.
--
With Best Regards,
Andy Shevchenko
On Tue, Nov 16, 2021 at 5:13 PM Andy Shevchenko
<[email protected]> wrote:
> On Tue, Nov 16, 2021 at 6:09 PM Arnd Bergmann <[email protected]> wrote:
> > On Tue, Nov 16, 2021 at 4:01 PM Emil Renner Berthing <[email protected]> wrote:
>
> Why?
> Submitting Patches tells about chronological order and last SoB to be
> from the submitter.
> These both are correct. Note the difference between 'last SoB' and
> 'SoB to be last [line]'.
>
> Here is the excerpt:
> "Notably, the last Signed-off-by: must always be that of the developer
> submitting the patch."
I think having the S-o-b in the final line is far more common, and it does
help identify who added the other tags, i.e. the person signing off
immediately below. I don't reject patches that do this the other way round,
but it's something that felt unusual here.
Arnd
On Tue, 16 Nov 2021 at 17:44, Arnd Bergmann <[email protected]> wrote:
> On Tue, Nov 16, 2021 at 5:13 PM Andy Shevchenko
> <[email protected]> wrote:
> > On Tue, Nov 16, 2021 at 6:09 PM Arnd Bergmann <[email protected]> wrote:
> > > On Tue, Nov 16, 2021 at 4:01 PM Emil Renner Berthing <[email protected]> wrote:
> >
> > Why?
> > Submitting Patches tells about chronological order and last SoB to be
> > from the submitter.
> > These both are correct. Note the difference between 'last SoB' and
> > 'SoB to be last [line]'.
> >
> > Here is the excerpt:
> > "Notably, the last Signed-off-by: must always be that of the developer
> > submitting the patch."
>
> I think having the S-o-b in the final line is far more common, and it does
> help identify who added the other tags, i.e. the person signing off
> immediately below. I don't reject patches that do this the other way round,
> but it's something that felt unusual here.
Then I'll stick to what's most common. In any case patch 12 and 16 got
it wrong by both conventions.
/Emil
On Tue, 16 Nov 2021 at 17:08, Arnd Bergmann <[email protected]> wrote:
> On Tue, Nov 16, 2021 at 4:01 PM Emil Renner Berthing <[email protected]> wrote:
> >
> > This series adds support for the StarFive JH7100 RISC-V SoC. The SoC has
> > many devices that need non-coherent dma operations to work which isn't
> > upstream yet[1], so this just adds basic support to boot up, get a
> > serial console, blink an LED and reboot itself. Unlike the Allwinner D1
> > this chip doesn't use any extra pagetable bits, but instead the DDR RAM
> > appears twice in the memory map, with and without the cache.
> >
> > The JH7100 is a test chip for the upcoming JH7110 and about 300 BeagleV
> > Starlight Beta boards were sent out with them as part of a now cancelled
> > BeagleBoard.org project. However StarFive has produced more of the
> > JH7100s and more boards will be available[2] to buy. I've seen pictures
> > of the new boards now, so hopefully before the end of the year.
> >
> > This series is also available at
> > https://github.com/esmil/linux/commits/starlight-minimal
> > ..but a more complete kernel including drivers for non-coherent
> > peripherals based on this series can be found at
> > https://github.com/starfive-tech/linux/tree/visionfive
> >
> > [1]: https://lore.kernel.org/linux-riscv/[email protected]/
> > [2]: https://www.linkedin.com/pulse/starfive-release-open-source-single-board-platform-q3-2021-starfive/
>
> Thanks for adding me to Cc, I've had a look at the series and didn't
> see anything
> wrong with it, and I'm happy to merge it through the SoC tree for the
> initial support
> in 5.17, provided you get an Ack from the arch/riscv maintainers for it.
Cool!
@Palmer, do you mind looking through this? Probably patch 1, 15 and 16
are the most relevant to you.
> Regarding the coherency issue, it's a bit sad to see yet another hacky
> workaround
> in the hardware, but as you say this is unrelated to the driver
> series. I'd actually
> argue that this one isn't that different from the other hack you
> describe, except
> this steals the pagetable bits from the address instead of the reserved flags...
Yeah, it's definitely a hack, but at least it's not using bits the
spec said was reserved. Hopefully the JH7110 will be fully coherent or
maybe implement the new Svpbmt extension.
/Emil
/Emil
On Tue, Nov 16, 2021 at 4:02 PM Emil Renner Berthing <[email protected]> wrote:
> Add a combined pinctrl and GPIO driver for the JH7100 RISC-V SoC by
> StarFive Ltd. This is a test chip for their upcoming JH7110 SoC, which
> is said to feature only minor changes to these pinctrl/GPIO parts.
>
> For each "GPIO" there are two registers for configuring the output and
> output enable signals which may come from other peripherals. Among these
> are two special signals that are constant 0 and constant 1 respectively.
> Controlling the GPIOs from software is done by choosing one of these
> signals. In other words the same registers are used for both pin muxing
> and controlling the GPIOs, which makes it easier to combine the pinctrl
> and GPIO driver in one.
>
> I wrote the pinconf and pinmux parts, but the GPIO part of the code is
> based on the GPIO driver in the vendor tree written by Huan Feng with
> cleanups and fixes by Drew and me.
>
> Datasheet: https://github.com/starfive-tech/JH7100_Docs/blob/main/JH7100%20Data%20Sheet%20V01.01.04-EN%20(4-21-2021).pdf
> Co-developed-by: Huan Feng <[email protected]>
> Signed-off-by: Huan Feng <[email protected]>
> Signed-off-by: Emil Renner Berthing <[email protected]>
> Co-developed-by: Drew Fustini <[email protected]>
> Signed-off-by: Drew Fustini <[email protected]>
Overall there is nothing wrong with this, and it is in nice shape.
Let's merge it:
Reviewed-by: Linus Walleij <[email protected]>
Yours,
Linus Walleij
On Tue, 16 Nov 2021 09:28:41 PST (-0800), [email protected] wrote:
> On Tue, 16 Nov 2021 at 17:08, Arnd Bergmann <[email protected]> wrote:
>> On Tue, Nov 16, 2021 at 4:01 PM Emil Renner Berthing <[email protected]> wrote:
>> >
>> > This series adds support for the StarFive JH7100 RISC-V SoC. The SoC has
>> > many devices that need non-coherent dma operations to work which isn't
>> > upstream yet[1], so this just adds basic support to boot up, get a
>> > serial console, blink an LED and reboot itself. Unlike the Allwinner D1
>> > this chip doesn't use any extra pagetable bits, but instead the DDR RAM
>> > appears twice in the memory map, with and without the cache.
>> >
>> > The JH7100 is a test chip for the upcoming JH7110 and about 300 BeagleV
>> > Starlight Beta boards were sent out with them as part of a now cancelled
>> > BeagleBoard.org project. However StarFive has produced more of the
>> > JH7100s and more boards will be available[2] to buy. I've seen pictures
>> > of the new boards now, so hopefully before the end of the year.
>> >
>> > This series is also available at
>> > https://github.com/esmil/linux/commits/starlight-minimal
>> > ..but a more complete kernel including drivers for non-coherent
>> > peripherals based on this series can be found at
>> > https://github.com/starfive-tech/linux/tree/visionfive
>> >
>> > [1]: https://lore.kernel.org/linux-riscv/[email protected]/
>> > [2]: https://www.linkedin.com/pulse/starfive-release-open-source-single-board-platform-q3-2021-starfive/
>>
>> Thanks for adding me to Cc, I've had a look at the series and didn't
>> see anything
>> wrong with it, and I'm happy to merge it through the SoC tree for the
>> initial support
>> in 5.17, provided you get an Ack from the arch/riscv maintainers for it.
>
> Cool!
>
> @Palmer, do you mind looking through this? Probably patch 1, 15 and 16
> are the most relevant to you.
>
>> Regarding the coherency issue, it's a bit sad to see yet another hacky
>> workaround
>> in the hardware, but as you say this is unrelated to the driver
>> series. I'd actually
>> argue that this one isn't that different from the other hack you
>> describe, except
>> this steals the pagetable bits from the address instead of the reserved flags...
>
> Yeah, it's definitely a hack, but at least it's not using bits the
> spec said was reserved. Hopefully the JH7110 will be fully coherent or
> maybe implement the new Svpbmt extension.
Sorry, this had been sitting on top of my inbox because I hadn't had a
chance to figure this stuff out. Emil poked me on IRC about it, but I
figured I'd just write it here so everyone can see:
IMO there's a huge difference between the StarFive-flavored non-coherent
stuff (which relies on physical aliasing) and the T-Head-flavored stuff
(which uses page table bits): the PA-aliasing approach is allowed by the
ISA, while the page table bits aren't (they're marked as reserved). IMO
we should still figure out a way to take the T-Head stuff, as it's the
real-ist hardware we have, but that's a whole different can of worms.
My worry with this is I've yet to actually be convinced that either of
these approaches work. Specifically, neither of them prevents M-mode
from performing (either directly or as a side effect of something like
speculation) accesses that violate the attributes we're ascribing to
regions in Linux. IIRC I pointed that out in the Svpmbt patch set,
which has exactly the same set of problems.
That said, I don't really care all that much -- having something here is
better than nothing, and we've always relied on the HW vendors just
producing HW that works when it comes to any of the IO stuff (ie, even
on coherent systems). These are all drivers so it's really up to those
folks where the bar is, so as long as everyone's on the page about that
you're not going to get any objections from me so
Acked-by: Palmer Dabbelt <[email protected]>
The SOC tree works for me. It'd be great to have a shared tag I where I
can pull in at least the Kconfig.socs stuff, but if that's not easy then
it's no big deal -- what's in flight there is pretty trivial on my end,
so we can just deal with the merge conflicts.
Thanks!
On Sat, 27 Nov 2021 at 02:30, Palmer Dabbelt <[email protected]> wrote:
> On Tue, 16 Nov 2021 09:28:41 PST (-0800), [email protected] wrote:
> > On Tue, 16 Nov 2021 at 17:08, Arnd Bergmann <[email protected]> wrote:
> >> On Tue, Nov 16, 2021 at 4:01 PM Emil Renner Berthing <[email protected]> wrote:
> >> >
> >> > This series adds support for the StarFive JH7100 RISC-V SoC. The SoC has
> >> > many devices that need non-coherent dma operations to work which isn't
> >> > upstream yet[1], so this just adds basic support to boot up, get a
> >> > serial console, blink an LED and reboot itself. Unlike the Allwinner D1
> >> > this chip doesn't use any extra pagetable bits, but instead the DDR RAM
> >> > appears twice in the memory map, with and without the cache.
> >> >
> >> > The JH7100 is a test chip for the upcoming JH7110 and about 300 BeagleV
> >> > Starlight Beta boards were sent out with them as part of a now cancelled
> >> > BeagleBoard.org project. However StarFive has produced more of the
> >> > JH7100s and more boards will be available[2] to buy. I've seen pictures
> >> > of the new boards now, so hopefully before the end of the year.
> >> >
> >> > This series is also available at
> >> > https://github.com/esmil/linux/commits/starlight-minimal
> >> > ..but a more complete kernel including drivers for non-coherent
> >> > peripherals based on this series can be found at
> >> > https://github.com/starfive-tech/linux/tree/visionfive
> >> >
> >> > [1]: https://lore.kernel.org/linux-riscv/[email protected]/
> >> > [2]: https://www.linkedin.com/pulse/starfive-release-open-source-single-board-platform-q3-2021-starfive/
> >>
> >> Thanks for adding me to Cc, I've had a look at the series and didn't
> >> see anything
> >> wrong with it, and I'm happy to merge it through the SoC tree for the
> >> initial support
> >> in 5.17, provided you get an Ack from the arch/riscv maintainers for it.
> >
> > Cool!
> >
> > @Palmer, do you mind looking through this? Probably patch 1, 15 and 16
> > are the most relevant to you.
> >
> >> Regarding the coherency issue, it's a bit sad to see yet another hacky
> >> workaround
> >> in the hardware, but as you say this is unrelated to the driver
> >> series. I'd actually
> >> argue that this one isn't that different from the other hack you
> >> describe, except
> >> this steals the pagetable bits from the address instead of the reserved flags...
> >
> > Yeah, it's definitely a hack, but at least it's not using bits the
> > spec said was reserved. Hopefully the JH7110 will be fully coherent or
> > maybe implement the new Svpbmt extension.
>
> Sorry, this had been sitting on top of my inbox because I hadn't had a
> chance to figure this stuff out. Emil poked me on IRC about it, but I
> figured I'd just write it here so everyone can see:
>
> IMO there's a huge difference between the StarFive-flavored non-coherent
> stuff (which relies on physical aliasing) and the T-Head-flavored stuff
> (which uses page table bits): the PA-aliasing approach is allowed by the
> ISA, while the page table bits aren't (they're marked as reserved). IMO
> we should still figure out a way to take the T-Head stuff, as it's the
> real-ist hardware we have, but that's a whole different can of worms.
>
> My worry with this is I've yet to actually be convinced that either of
> these approaches work. Specifically, neither of them prevents M-mode
> from performing (either directly or as a side effect of something like
> speculation) accesses that violate the attributes we're ascribing to
> regions in Linux. IIRC I pointed that out in the Svpmbt patch set,
> which has exactly the same set of problems.
>
> That said, I don't really care all that much -- having something here is
> better than nothing, and we've always relied on the HW vendors just
> producing HW that works when it comes to any of the IO stuff (ie, even
> on coherent systems). These are all drivers so it's really up to those
> folks where the bar is, so as long as everyone's on the page about that
> you're not going to get any objections from me so
>
> Acked-by: Palmer Dabbelt <[email protected]>
Thanks! Yeah, as you say something is better than nothing. I'd think
it's helpful to have something to build and test the non-coherent dma
functionality on, and the nice thing about the Starfive-flavour is
that it will actually boot into an initramfs root and have a working
serial console even without the non-coherent dmas working.
> The SOC tree works for me. It'd be great to have a shared tag I where I
> can pull in at least the Kconfig.socs stuff, but if that's not easy then
> it's no big deal -- what's in flight there is pretty trivial on my end,
> so we can just deal with the merge conflicts.
I guess this is for the SoC maintainers to consider. Let me know if
that's wrong and I need to do anything.
/Emil
Quoting Emil Renner Berthing (2021-11-16 07:01:07)
> From: Geert Uytterhoeven <[email protected]>
>
> Add all clock outputs for the StarFive JH7100 clock generator.
>
> Based on work by Ahmad Fatoum for Barebox, with "JH7100_" prefixes added
> to all definitions.
>
> Signed-off-by: Geert Uytterhoeven <[email protected]>
> Signed-off-by: Emil Renner Berthing <[email protected]>
> Acked-by: Rob Herring <[email protected]>
> ---
Acked-by: Stephen Boyd <[email protected]>
Quoting Emil Renner Berthing (2021-11-16 07:01:08)
> From: Geert Uytterhoeven <[email protected]>
>
> Add bindings for the clock generator on the JH7100 RISC-V SoC by
> StarFive Ltd. This is a test chip for their upcoming JH7110 SoC.
>
> Signed-off-by: Geert Uytterhoeven <[email protected]>
> Signed-off-by: Emil Renner Berthing <[email protected]>
> Reviewed-by: Rob Herring <[email protected]>
> ---
Acked-by: Stephen Boyd <[email protected]>
Quoting Emil Renner Berthing (2021-11-16 07:01:09)
> From: Geert Uytterhoeven <[email protected]>
>
> Add a driver for the StarFive JH7100 clock generator.
>
> Signed-off-by: Geert Uytterhoeven <[email protected]>
> Co-developed-by: Emil Renner Berthing <[email protected]>
> Signed-off-by: Emil Renner Berthing <[email protected]>
> Reviewed-by: Andy Shevchenko <[email protected]>
> ---
Acked-by: Stephen Boyd <[email protected]>