Add support for Xilinx ZynqMP pinctrl driver and also update the
Xilinx firmware driver to support pinctrl functionality.
This driver queries the pin information from the firmware and
allow configuring the pins as per the request.
changes in v3:
- Fixed binding doc comments from Rob.
- Used 'maxItems' for groups and pins properties.
- Updated commit subject and description to have
present tense statements.
changes in v2:
- Use pattern for pin names in yaml file.
- Updated to support multiple groups and pins.
- Added type ref for the vendor specific properties.
- Removed 'schmitt-cmos', instead used common properties.
- Removed macros for drive-strength property.
Sai Krishna Potthuri (3):
firmware: xilinx: Add pinctrl support
dt-bindings: pinctrl: Add binding for ZynqMP pinctrl driver
pinctrl: Add Xilinx ZynqMP pinctrl driver support
.../bindings/pinctrl/xlnx,zynqmp-pinctrl.yaml | 339 ++++++
drivers/firmware/xilinx/zynqmp.c | 114 ++
drivers/pinctrl/Kconfig | 13 +
drivers/pinctrl/Makefile | 1 +
drivers/pinctrl/pinctrl-zynqmp.c | 1031 +++++++++++++++++
include/dt-bindings/pinctrl/pinctrl-zynqmp.h | 19 +
include/linux/firmware/xlnx-zynqmp.h | 90 ++
7 files changed, 1607 insertions(+)
create mode 100644 Documentation/devicetree/bindings/pinctrl/xlnx,zynqmp-pinctrl.yaml
create mode 100644 drivers/pinctrl/pinctrl-zynqmp.c
create mode 100644 include/dt-bindings/pinctrl/pinctrl-zynqmp.h
--
2.17.1
Adding pinctrl support to query platform specific information (pins)
from firmware.
Signed-off-by: Sai Krishna Potthuri <[email protected]>
Acked-by: Michal Simek <[email protected]>
---
drivers/firmware/xilinx/zynqmp.c | 114 +++++++++++++++++++++++++++
include/linux/firmware/xlnx-zynqmp.h | 90 +++++++++++++++++++++
2 files changed, 204 insertions(+)
diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
index efb8a66efc68..299c3d5a9ebd 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c
@@ -784,6 +784,120 @@ int zynqmp_pm_fpga_get_status(u32 *value)
}
EXPORT_SYMBOL_GPL(zynqmp_pm_fpga_get_status);
+/**
+ * zynqmp_pm_pinctrl_request - Request Pin from firmware
+ * @pin: Pin number to request
+ *
+ * This function requests pin from firmware.
+ *
+ * Return: Returns status, either success or error+reason.
+ */
+int zynqmp_pm_pinctrl_request(const u32 pin)
+{
+ return zynqmp_pm_invoke_fn(PM_PINCTRL_REQUEST, pin, 0, 0, 0, NULL);
+}
+EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_request);
+
+/**
+ * zynqmp_pm_pinctrl_release - Inform firmware that Pin control is released
+ * @pin: Pin number to release
+ *
+ * This function release pin from firmware.
+ *
+ * Return: Returns status, either success or error+reason.
+ */
+int zynqmp_pm_pinctrl_release(const u32 pin)
+{
+ return zynqmp_pm_invoke_fn(PM_PINCTRL_RELEASE, pin, 0, 0, 0, NULL);
+}
+EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_release);
+
+/**
+ * zynqmp_pm_pinctrl_get_function - Read function id set for the given pin
+ * @pin: Pin number
+ * @id: Buffer to store function ID
+ *
+ * This function provides the function currently set for the given pin.
+ *
+ * Return: Returns status, either success or error+reason
+ */
+int zynqmp_pm_pinctrl_get_function(const u32 pin, u32 *id)
+{
+ u32 ret_payload[PAYLOAD_ARG_CNT];
+ int ret;
+
+ if (!id)
+ return -EINVAL;
+
+ ret = zynqmp_pm_invoke_fn(PM_PINCTRL_GET_FUNCTION, pin, 0,
+ 0, 0, ret_payload);
+ *id = ret_payload[1];
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_get_function);
+
+/**
+ * zynqmp_pm_pinctrl_set_function - Set requested function for the pin
+ * @pin: Pin number
+ * @id: Function ID to set
+ *
+ * This function sets requested function for the given pin.
+ *
+ * Return: Returns status, either success or error+reason.
+ */
+int zynqmp_pm_pinctrl_set_function(const u32 pin, const u32 id)
+{
+ return zynqmp_pm_invoke_fn(PM_PINCTRL_SET_FUNCTION, pin, id,
+ 0, 0, NULL);
+}
+EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_set_function);
+
+/**
+ * zynqmp_pm_pinctrl_get_config - Get configuration parameter for the pin
+ * @pin: Pin number
+ * @param: Parameter to get
+ * @value: Buffer to store parameter value
+ *
+ * This function gets requested configuration parameter for the given pin.
+ *
+ * Return: Returns status, either success or error+reason.
+ */
+int zynqmp_pm_pinctrl_get_config(const u32 pin, const u32 param,
+ u32 *value)
+{
+ u32 ret_payload[PAYLOAD_ARG_CNT];
+ int ret;
+
+ if (!value)
+ return -EINVAL;
+
+ ret = zynqmp_pm_invoke_fn(PM_PINCTRL_CONFIG_PARAM_GET, pin, param,
+ 0, 0, ret_payload);
+ *value = ret_payload[1];
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_get_config);
+
+/**
+ * zynqmp_pm_pinctrl_set_config - Set configuration parameter for the pin
+ * @pin: Pin number
+ * @param: Parameter to set
+ * @value: Parameter value to set
+ *
+ * This function sets requested configuration parameter for the given pin.
+ *
+ * Return: Returns status, either success or error+reason.
+ */
+int zynqmp_pm_pinctrl_set_config(const u32 pin, const u32 param,
+ u32 value)
+{
+ return zynqmp_pm_invoke_fn(PM_PINCTRL_CONFIG_PARAM_SET, pin,
+ param, value, 0, NULL);
+}
+EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_set_config);
+
/**
* zynqmp_pm_init_finalize() - PM call to inform firmware that the caller
* master has initialized its own power management
diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
index 5968df82b991..75aa6a5afa28 100644
--- a/include/linux/firmware/xlnx-zynqmp.h
+++ b/include/linux/firmware/xlnx-zynqmp.h
@@ -74,6 +74,12 @@ enum pm_api_id {
PM_FPGA_LOAD,
PM_FPGA_GET_STATUS,
PM_GET_CHIPID = 24,
+ PM_PINCTRL_REQUEST = 28,
+ PM_PINCTRL_RELEASE = 29,
+ PM_PINCTRL_GET_FUNCTION = 30,
+ PM_PINCTRL_SET_FUNCTION = 31,
+ PM_PINCTRL_CONFIG_PARAM_GET = 32,
+ PM_PINCTRL_CONFIG_PARAM_SET = 33,
PM_IOCTL = 34,
PM_QUERY_DATA,
PM_CLOCK_ENABLE,
@@ -125,6 +131,12 @@ enum pm_query_id {
PM_QID_CLOCK_GET_FIXEDFACTOR_PARAMS,
PM_QID_CLOCK_GET_PARENTS,
PM_QID_CLOCK_GET_ATTRIBUTES,
+ PM_QID_PINCTRL_GET_NUM_PINS = 6,
+ PM_QID_PINCTRL_GET_NUM_FUNCTIONS = 7,
+ PM_QID_PINCTRL_GET_NUM_FUNCTION_GROUPS = 8,
+ PM_QID_PINCTRL_GET_FUNCTION_NAME = 9,
+ PM_QID_PINCTRL_GET_FUNCTION_GROUPS = 10,
+ PM_QID_PINCTRL_GET_PIN_GROUPS = 11,
PM_QID_CLOCK_GET_NUM_CLOCKS = 12,
PM_QID_CLOCK_GET_MAX_DIVISOR,
};
@@ -288,6 +300,44 @@ enum dll_reset_type {
PM_DLL_RESET_PULSE,
};
+enum pm_pinctrl_config_param {
+ PM_PINCTRL_CONFIG_SLEW_RATE = 0,
+ PM_PINCTRL_CONFIG_BIAS_STATUS = 1,
+ PM_PINCTRL_CONFIG_PULL_CTRL = 2,
+ PM_PINCTRL_CONFIG_SCHMITT_CMOS = 3,
+ PM_PINCTRL_CONFIG_DRIVE_STRENGTH = 4,
+ PM_PINCTRL_CONFIG_VOLTAGE_STATUS = 5,
+ PM_PINCTRL_CONFIG_TRI_STATE = 6,
+ PM_PINCTRL_CONFIG_MAX = 7,
+};
+
+enum pm_pinctrl_slew_rate {
+ PM_PINCTRL_SLEW_RATE_FAST = 0,
+ PM_PINCTRL_SLEW_RATE_SLOW = 1,
+};
+
+enum pm_pinctrl_bias_status {
+ PM_PINCTRL_BIAS_DISABLE = 0,
+ PM_PINCTRL_BIAS_ENABLE = 1,
+};
+
+enum pm_pinctrl_pull_ctrl {
+ PM_PINCTRL_BIAS_PULL_DOWN = 0,
+ PM_PINCTRL_BIAS_PULL_UP = 1,
+};
+
+enum pm_pinctrl_schmitt_cmos {
+ PM_PINCTRL_INPUT_TYPE_CMOS = 0,
+ PM_PINCTRL_INPUT_TYPE_SCHMITT = 1,
+};
+
+enum pm_pinctrl_drive_strength {
+ PM_PINCTRL_DRIVE_STRENGTH_2MA = 0,
+ PM_PINCTRL_DRIVE_STRENGTH_4MA = 1,
+ PM_PINCTRL_DRIVE_STRENGTH_8MA = 2,
+ PM_PINCTRL_DRIVE_STRENGTH_12MA = 3,
+};
+
enum zynqmp_pm_shutdown_type {
ZYNQMP_PM_SHUTDOWN_TYPE_SHUTDOWN,
ZYNQMP_PM_SHUTDOWN_TYPE_RESET,
@@ -357,6 +407,14 @@ int zynqmp_pm_write_pggs(u32 index, u32 value);
int zynqmp_pm_read_pggs(u32 index, u32 *value);
int zynqmp_pm_system_shutdown(const u32 type, const u32 subtype);
int zynqmp_pm_set_boot_health_status(u32 value);
+int zynqmp_pm_pinctrl_request(const u32 pin);
+int zynqmp_pm_pinctrl_release(const u32 pin);
+int zynqmp_pm_pinctrl_get_function(const u32 pin, u32 *id);
+int zynqmp_pm_pinctrl_set_function(const u32 pin, const u32 id);
+int zynqmp_pm_pinctrl_get_config(const u32 pin, const u32 param,
+ u32 *value);
+int zynqmp_pm_pinctrl_set_config(const u32 pin, const u32 param,
+ u32 value);
#else
static inline struct zynqmp_eemi_ops *zynqmp_pm_get_eemi_ops(void)
{
@@ -507,6 +565,38 @@ static inline int zynqmp_pm_set_boot_health_status(u32 value)
{
return -ENODEV;
}
+
+static inline int zynqmp_pm_pinctrl_request(const u32 pin)
+{
+ return -ENODEV;
+}
+
+static inline int zynqmp_pm_pinctrl_release(const u32 pin)
+{
+ return -ENODEV;
+}
+
+static inline int zynqmp_pm_pinctrl_get_function(const u32 pin, u32 *id)
+{
+ return -ENODEV;
+}
+
+static inline int zynqmp_pm_pinctrl_set_function(const u32 pin, const u32 id)
+{
+ return -ENODEV;
+}
+
+static inline int zynqmp_pm_pinctrl_get_config(const u32 pin, const u32 param,
+ u32 *value)
+{
+ return -ENODEV;
+}
+
+static inline int zynqmp_pm_pinctrl_set_config(const u32 pin, const u32 param,
+ u32 value)
+{
+ return -ENODEV;
+}
#endif
#endif /* __FIRMWARE_ZYNQMP_H__ */
--
2.17.1
Adding documentation and dt-bindings file which contains MIO pin
configuration defines for Xilinx ZynqMP pinctrl driver.
Signed-off-by: Sai Krishna Potthuri <[email protected]>
---
.../bindings/pinctrl/xlnx,zynqmp-pinctrl.yaml | 339 ++++++++++++++++++
include/dt-bindings/pinctrl/pinctrl-zynqmp.h | 19 +
2 files changed, 358 insertions(+)
create mode 100644 Documentation/devicetree/bindings/pinctrl/xlnx,zynqmp-pinctrl.yaml
create mode 100644 include/dt-bindings/pinctrl/pinctrl-zynqmp.h
diff --git a/Documentation/devicetree/bindings/pinctrl/xlnx,zynqmp-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/xlnx,zynqmp-pinctrl.yaml
new file mode 100644
index 000000000000..0c1149706f8b
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/xlnx,zynqmp-pinctrl.yaml
@@ -0,0 +1,339 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pinctrl/xlnx,zynqmp-pinctrl.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Xilinx ZynqMP Pinctrl
+
+maintainers:
+ - Sai Krishna Potthuri <[email protected]>
+ - Rajan Vaja <[email protected]>
+
+description: |
+ Please refer to pinctrl-bindings.txt in this directory for details of the
+ common pinctrl bindings used by client devices, including the meaning of the
+ phrase "pin configuration node".
+
+ ZynqMP's pin configuration nodes act as a container for an arbitrary number of
+ subnodes. Each of these subnodes represents some desired configuration for a
+ pin, a group, or a list of pins or groups. This configuration can include the
+ mux function to select on those pin(s)/group(s), and various pin configuration
+ parameters, such as pull-up, slew rate, etc.
+
+ Each configuration node can consist of multiple nodes describing the pinmux and
+ pinconf options. Those nodes can be pinmux nodes or pinconf nodes.
+
+ The name of each subnode is not important; all subnodes should be enumerated
+ and processed purely based on their content.
+
+properties:
+ compatible:
+ const: xlnx,zynqmp-pinctrl
+
+patternProperties:
+ '^(.*-)?(default|gpio)$':
+ type: object
+ patternProperties:
+ '^mux':
+ type: object
+ description:
+ Pinctrl node's client devices use subnodes for pin muxes,
+ which in turn use below standard properties.
+ $ref: pinmux-node.yaml#
+
+ properties:
+ groups:
+ description:
+ List of groups to select (either this or "pins" must be
+ specified), available groups for this subnode.
+ items:
+ enum: [ethernet0_0_grp, ethernet1_0_grp, ethernet2_0_grp,
+ ethernet3_0_grp, gemtsu0_0_grp, gemtsu0_1_grp,
+ gemtsu0_2_grp, mdio0_0_grp, mdio1_0_grp,
+ mdio1_1_grp, mdio2_0_grp, mdio3_0_grp,
+ qspi0_0_grp, qspi_ss_0_grp, qspi_fbclk_0_grp,
+ spi0_0_grp, spi0_ss_0_grp, spi0_ss_1_grp,
+ spi0_ss_2_grp, spi0_1_grp, spi0_ss_3_grp,
+ spi0_ss_4_grp, spi0_ss_5_grp, spi0_2_grp,
+ spi0_ss_6_grp, spi0_ss_7_grp, spi0_ss_8_grp,
+ spi0_3_grp, spi0_ss_9_grp, spi0_ss_10_grp,
+ spi0_ss_11_grp, spi0_4_grp, spi0_ss_12_grp,
+ spi0_ss_13_grp, spi0_ss_14_grp, spi0_5_grp,
+ spi0_ss_15_grp, spi0_ss_16_grp, spi0_ss_17_grp,
+ spi1_0_grp, spi1_ss_0_grp, spi1_ss_1_grp,
+ spi1_ss_2_grp, spi1_1_grp, spi1_ss_3_grp,
+ spi1_ss_4_grp, spi1_ss_5_grp, spi1_2_grp,
+ spi1_ss_6_grp, spi1_ss_7_grp, spi1_ss_8_grp,
+ spi1_3_grp, spi1_ss_9_grp, spi1_ss_10_grp,
+ spi1_ss_11_grp, spi1_4_grp, spi1_ss_12_grp,
+ spi1_ss_13_grp, spi1_ss_14_grp, spi1_5_grp,
+ spi1_ss_15_grp, spi1_ss_16_grp, spi1_ss_17_grp,
+ sdio0_0_grp, sdio0_1_grp, sdio0_2_grp,
+ sdio0_3_grp, sdio0_4_grp, sdio0_5_grp,
+ sdio0_6_grp, sdio0_7_grp, sdio0_8_grp,
+ sdio0_9_grp, sdio0_10_grp, sdio0_11_grp,
+ sdio0_12_grp, sdio0_13_grp, sdio0_14_grp,
+ sdio0_15_grp, sdio0_16_grp, sdio0_17_grp,
+ sdio0_18_grp, sdio0_19_grp, sdio0_20_grp,
+ sdio0_21_grp, sdio0_22_grp, sdio0_23_grp,
+ sdio0_24_grp, sdio0_25_grp, sdio0_26_grp,
+ sdio0_27_grp, sdio0_28_grp, sdio0_29_grp,
+ sdio0_30_grp, sdio0_31_grp, sdio0_32_grp,
+ sdio0_pc_0_grp, sdio0_cd_0_grp, sdio0_wp_0_grp,
+ sdio0_pc_1_grp, sdio0_cd_1_grp, sdio0_wp_1_grp,
+ sdio0_pc_2_grp, sdio0_cd_2_grp, sdio0_wp_2_grp,
+ sdio1_0_grp, sdio1_1_grp, sdio1_2_grp,
+ sdio1_3_grp, sdio1_4_grp, sdio1_5_grp,
+ sdio1_6_grp, sdio1_7_grp, sdio1_8_grp,
+ sdio1_9_grp, sdio1_10_grp, sdio1_11_grp,
+ sdio1_12_grp, sdio1_13_grp, sdio1_14_grp,
+ sdio1_15_grp, sdio1_pc_0_grp, sdio1_cd_0_grp,
+ sdio1_wp_0_grp, sdio1_pc_1_grp, sdio1_cd_1_grp,
+ sdio1_wp_1_grp, nand0_0_grp, nand0_ce_0_grp,
+ nand0_rb_0_grp, nand0_dqs_0_grp, nand0_ce_1_grp,
+ nand0_rb_1_grp, nand0_dqs_1_grp, can0_0_grp,
+ can0_1_grp, can0_2_grp, can0_3_grp,
+ can0_4_grp, can0_5_grp, can0_6_grp,
+ can0_7_grp, can0_8_grp, can0_9_grp,
+ can0_10_grp, can0_11_grp, can0_12_grp,
+ can0_13_grp, can0_14_grp, can0_15_grp,
+ can0_16_grp, can0_17_grp, can0_18_grp,
+ can1_0_grp, can1_1_grp, can1_2_grp,
+ can1_3_grp, can1_4_grp, can1_5_grp,
+ can1_6_grp, can1_7_grp, can1_8_grp,
+ can1_9_grp, can1_10_grp, can1_11_grp,
+ can1_12_grp, can1_13_grp, can1_14_grp,
+ can1_15_grp, can1_16_grp, can1_17_grp,
+ can1_18_grp, can1_19_grp, uart0_0_grp,
+ uart0_1_grp, uart0_2_grp, uart0_3_grp,
+ uart0_4_grp, uart0_5_grp, uart0_6_grp,
+ uart0_7_grp, uart0_8_grp, uart0_9_grp,
+ uart0_10_grp, uart0_11_grp, uart0_12_grp,
+ uart0_13_grp, uart0_14_grp, uart0_15_grp,
+ uart0_16_grp, uart0_17_grp, uart0_18_grp,
+ uart1_0_grp, uart1_1_grp, uart1_2_grp,
+ uart1_3_grp, uart1_4_grp, uart1_5_grp,
+ uart1_6_grp, uart1_7_grp, uart1_8_grp,
+ uart1_9_grp, uart1_10_grp, uart1_11_grp,
+ uart1_12_grp, uart1_13_grp, uart1_14_grp,
+ uart1_15_grp, uart1_16_grp, uart1_17_grp,
+ uart1_18_grp, i2c0_0_grp, i2c0_1_grp,
+ i2c0_2_grp, i2c0_3_grp, i2c0_4_grp,
+ i2c0_5_grp, i2c0_6_grp, i2c0_7_grp,
+ i2c0_8_grp, i2c0_9_grp, i2c0_10_grp,
+ i2c0_11_grp, i2c0_12_grp, i2c0_13_grp,
+ i2c0_14_grp, i2c0_15_grp, i2c0_16_grp,
+ i2c0_17_grp, i2c0_18_grp, i2c1_0_grp,
+ i2c1_1_grp, i2c1_2_grp, i2c1_3_grp,
+ i2c1_4_grp, i2c1_5_grp, i2c1_6_grp,
+ i2c1_7_grp, i2c1_8_grp, i2c1_9_grp,
+ i2c1_10_grp, i2c1_11_grp, i2c1_12_grp,
+ i2c1_13_grp, i2c1_14_grp, i2c1_15_grp,
+ i2c1_16_grp, i2c1_17_grp, i2c1_18_grp,
+ i2c1_19_grp, ttc0_clk_0_grp, ttc0_wav_0_grp,
+ ttc0_clk_1_grp, ttc0_wav_1_grp, ttc0_clk_2_grp,
+ ttc0_wav_2_grp, ttc0_clk_3_grp, ttc0_wav_3_grp,
+ ttc0_clk_4_grp, ttc0_wav_4_grp, ttc0_clk_5_grp,
+ ttc0_wav_5_grp, ttc0_clk_6_grp, ttc0_wav_6_grp,
+ ttc0_clk_7_grp, ttc0_wav_7_grp, ttc0_clk_8_grp,
+ ttc0_wav_8_grp, ttc1_clk_0_grp, ttc1_wav_0_grp,
+ ttc1_clk_1_grp, ttc1_wav_1_grp, ttc1_clk_2_grp,
+ ttc1_wav_2_grp, ttc1_clk_3_grp, ttc1_wav_3_grp,
+ ttc1_clk_4_grp, ttc1_wav_4_grp, ttc1_clk_5_grp,
+ ttc1_wav_5_grp, ttc1_clk_6_grp, ttc1_wav_6_grp,
+ ttc1_clk_7_grp, ttc1_wav_7_grp, ttc1_clk_8_grp,
+ ttc1_wav_8_grp, ttc2_clk_0_grp, ttc2_wav_0_grp,
+ ttc2_clk_1_grp, ttc2_wav_1_grp, ttc2_clk_2_grp,
+ ttc2_wav_2_grp, ttc2_clk_3_grp, ttc2_wav_3_grp,
+ ttc2_clk_4_grp, ttc2_wav_4_grp, ttc2_clk_5_grp,
+ ttc2_wav_5_grp, ttc2_clk_6_grp, ttc2_wav_6_grp,
+ ttc2_clk_7_grp, ttc2_wav_7_grp, ttc2_clk_8_grp,
+ ttc2_wav_8_grp, ttc3_clk_0_grp, ttc3_wav_0_grp,
+ ttc3_clk_1_grp, ttc3_wav_1_grp, ttc3_clk_2_grp,
+ ttc3_wav_2_grp, ttc3_clk_3_grp, ttc3_wav_3_grp,
+ ttc3_clk_4_grp, ttc3_wav_4_grp, ttc3_clk_5_grp,
+ ttc3_wav_5_grp, ttc3_clk_6_grp, ttc3_wav_6_grp,
+ ttc3_clk_7_grp, ttc3_wav_7_grp, ttc3_clk_8_grp,
+ ttc3_wav_8_grp, swdt0_clk_0_grp, swdt0_rst_0_grp,
+ swdt0_clk_1_grp, swdt0_rst_1_grp, swdt0_clk_2_grp,
+ swdt0_rst_2_grp, swdt0_clk_3_grp, swdt0_rst_3_grp,
+ swdt0_clk_4_grp, swdt0_rst_4_grp, swdt0_clk_5_grp,
+ swdt0_rst_5_grp, swdt0_clk_6_grp, swdt0_rst_6_grp,
+ swdt0_clk_7_grp, swdt0_rst_7_grp, swdt0_clk_8_grp,
+ swdt0_rst_8_grp, swdt0_clk_9_grp, swdt0_rst_9_grp,
+ swdt0_clk_10_grp, swdt0_rst_10_grp, swdt0_clk_11_grp,
+ swdt0_rst_11_grp, swdt0_clk_12_grp, swdt0_rst_12_grp,
+ swdt1_clk_0_grp, swdt1_rst_0_grp, swdt1_clk_1_grp,
+ swdt1_rst_1_grp, swdt1_clk_2_grp, swdt1_rst_2_grp,
+ swdt1_clk_3_grp, swdt1_rst_3_grp, swdt1_clk_4_grp,
+ swdt1_rst_4_grp, swdt1_clk_5_grp, swdt1_rst_5_grp,
+ swdt1_clk_6_grp, swdt1_rst_6_grp, swdt1_clk_7_grp,
+ swdt1_rst_7_grp, swdt1_clk_8_grp, swdt1_rst_8_grp,
+ swdt1_clk_9_grp, swdt1_rst_9_grp, swdt1_clk_10_grp,
+ swdt1_rst_10_grp, swdt1_clk_11_grp, swdt1_rst_11_grp,
+ swdt1_clk_12_grp, swdt1_rst_12_grp, gpio0_0_grp,
+ gpio0_1_grp, gpio0_2_grp, gpio0_3_grp,
+ gpio0_4_grp, gpio0_5_grp, gpio0_6_grp,
+ gpio0_7_grp, gpio0_8_grp, gpio0_9_grp,
+ gpio0_10_grp, gpio0_11_grp, gpio0_12_grp,
+ gpio0_13_grp, gpio0_14_grp, gpio0_15_grp,
+ gpio0_16_grp, gpio0_17_grp, gpio0_18_grp,
+ gpio0_19_grp, gpio0_20_grp, gpio0_21_grp,
+ gpio0_22_grp, gpio0_23_grp, gpio0_24_grp,
+ gpio0_25_grp, gpio0_26_grp, gpio0_27_grp,
+ gpio0_28_grp, gpio0_29_grp, gpio0_30_grp,
+ gpio0_31_grp, gpio0_32_grp, gpio0_33_grp,
+ gpio0_34_grp, gpio0_35_grp, gpio0_36_grp,
+ gpio0_37_grp, gpio0_38_grp, gpio0_39_grp,
+ gpio0_40_grp, gpio0_41_grp, gpio0_42_grp,
+ gpio0_43_grp, gpio0_44_grp, gpio0_45_grp,
+ gpio0_46_grp, gpio0_47_grp, gpio0_48_grp,
+ gpio0_49_grp, gpio0_50_grp, gpio0_51_grp,
+ gpio0_52_grp, gpio0_53_grp, gpio0_54_grp,
+ gpio0_55_grp, gpio0_56_grp, gpio0_57_grp,
+ gpio0_58_grp, gpio0_59_grp, gpio0_60_grp,
+ gpio0_61_grp, gpio0_62_grp, gpio0_63_grp,
+ gpio0_64_grp, gpio0_65_grp, gpio0_66_grp,
+ gpio0_67_grp, gpio0_68_grp, gpio0_69_grp,
+ gpio0_70_grp, gpio0_71_grp, gpio0_72_grp,
+ gpio0_73_grp, gpio0_74_grp, gpio0_75_grp,
+ gpio0_76_grp, gpio0_77_grp, usb0_0_grp,
+ usb1_0_grp, pmu0_0_grp, pmu0_1_grp,
+ pmu0_2_grp, pmu0_3_grp, pmu0_4_grp,
+ pmu0_5_grp, pmu0_6_grp, pmu0_7_grp,
+ pmu0_8_grp, pmu0_9_grp, pmu0_10_grp,
+ pmu0_11_grp, pcie0_0_grp, pcie0_1_grp,
+ pcie0_2_grp, pcie0_3_grp, pcie0_4_grp,
+ pcie0_5_grp, pcie0_6_grp, pcie0_7_grp,
+ csu0_0_grp, csu0_1_grp, csu0_2_grp,
+ csu0_3_grp, csu0_4_grp, csu0_5_grp,
+ csu0_6_grp, csu0_7_grp, csu0_8_grp,
+ csu0_9_grp, csu0_10_grp, csu0_11_grp,
+ dpaux0_0_grp, dpaux0_1_grp, dpaux0_2_grp,
+ dpaux0_3_grp, pjtag0_0_grp, pjtag0_1_grp,
+ pjtag0_2_grp, pjtag0_3_grp, pjtag0_4_grp,
+ pjtag0_5_grp, trace0_0_grp, trace0_clk_0_grp,
+ trace0_1_grp, trace0_clk_1_grp, trace0_2_grp,
+ trace0_clk_2_grp, testscan0_0_grp]
+ maxItems: 78
+
+ function:
+ description:
+ Specify the alternative function to be configured for the
+ given pin groups.
+ enum: [ethernet0, ethernet1, ethernet2, ethernet3, gemtsu0, usb0, usb1, mdio0,
+ mdio1, mdio2, mdio3, qspi0, qspi_fbclk, qspi_ss, spi0, spi1, spi0_ss,
+ spi1_ss, sdio0, sdio0_pc, sdio0_wp, sdio0_cd, sdio1, sdio1_pc, sdio1_wp,
+ sdio1_cd, nand0, nand0_ce, nand0_rb, nand0_dqs, can0, can1, uart0, uart1,
+ i2c0, i2c1, ttc0_clk, ttc0_wav, ttc1_clk, ttc1_wav, ttc2_clk, ttc2_wav,
+ ttc3_clk, ttc3_wav, swdt0_clk, swdt0_rst, swdt1_clk, swdt1_rst, gpio0, pmu0,
+ pcie0, csu0, dpaux0, pjtag0, trace0, trace0_clk, testscan0]
+
+ required:
+ - groups
+ - function
+
+ additionalProperties: false
+
+ '^conf':
+ type: object
+ description:
+ Pinctrl node's client devices use subnodes for pin configurations,
+ which in turn use the standard properties below.
+ $ref: pincfg-node.yaml#
+
+ properties:
+ groups:
+ description:
+ List of pin groups as mentioned above.
+
+ pins:
+ description:
+ List of pin names to select in this subnode.
+ items:
+ pattern: '^MIO([0-9]|[1-6][0-9]|7[0-7])$'
+ maxItems: 78
+
+ bias-pull-up: true
+
+ bias-pull-down: true
+
+ bias-disable: true
+
+ input-schmitt-enable: true
+
+ input-schmitt-disable: true
+
+ bias-high-impedance: true
+
+ low-power-enable: true
+
+ low-power-disable: true
+
+ slew-rate:
+ enum: [0, 1]
+
+ drive-strength:
+ description:
+ Selects the drive strength for MIO pins, in mA.
+ enum: [2, 4, 8, 12]
+
+ io-standard:
+ description:
+ Selects the IO standard for MIO pins, this is driver specific.
+ $ref: "/schemas/types.yaml#/definitions/uint32"
+ enum: [0, 1]
+
+ oneOf:
+ - required: [ groups ]
+ - required: [ pins ]
+
+ additionalProperties: false
+
+ additionalProperties: false
+
+required:
+ - compatible
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/pinctrl/pinctrl-zynqmp.h>
+ zynqmp_firmware: zynqmp-firmware {
+ pinctrl0: pinctrl {
+ compatible = "xlnx,zynqmp-pinctrl";
+
+ pinctrl_uart1_default: uart1-default {
+ mux {
+ groups = "uart0_4_grp", "uart0_5_grp";
+ function = "uart0";
+ };
+
+ conf {
+ groups = "uart0_4_grp";
+ slew-rate = <SLEW_RATE_SLOW>;
+ io-standard = <IO_STANDARD_LVCMOS18>;
+ };
+
+ conf-rx {
+ pins = "MIO18";
+ bias-pull-up;
+ };
+
+ conf-tx {
+ pins = "MIO19";
+ bias-disable;
+ input-schmitt-disable;
+ };
+ };
+ };
+ };
+
+ uart1 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_uart1_default>;
+ };
+
+...
diff --git a/include/dt-bindings/pinctrl/pinctrl-zynqmp.h b/include/dt-bindings/pinctrl/pinctrl-zynqmp.h
new file mode 100644
index 000000000000..b86b29d41bb4
--- /dev/null
+++ b/include/dt-bindings/pinctrl/pinctrl-zynqmp.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * MIO pin configuration defines for Xilinx ZynqMP
+ *
+ * Copyright (C) 2020 Xilinx, Inc.
+ */
+
+#ifndef _DT_BINDINGS_PINCTRL_ZYNQMP_H
+#define _DT_BINDINGS_PINCTRL_ZYNQMP_H
+
+/* Bit value for IO standards */
+#define IO_STANDARD_LVCMOS33 0
+#define IO_STANDARD_LVCMOS18 1
+
+/* Bit values for Slew Rates */
+#define SLEW_RATE_FAST 0
+#define SLEW_RATE_SLOW 1
+
+#endif /* _DT_BINDINGS_PINCTRL_ZYNQMP_H */
--
2.17.1
Adding pinctrl driver for Xilinx ZynqMP platform.
This driver queries pin information from firmware and registers
pin control accordingly.
Signed-off-by: Sai Krishna Potthuri <[email protected]>
---
drivers/pinctrl/Kconfig | 13 +
drivers/pinctrl/Makefile | 1 +
drivers/pinctrl/pinctrl-zynqmp.c | 1031 ++++++++++++++++++++++++++++++
3 files changed, 1045 insertions(+)
create mode 100644 drivers/pinctrl/pinctrl-zynqmp.c
diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index 815095326e2d..25d3c7208975 100644
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -341,6 +341,19 @@ config PINCTRL_ZYNQ
help
This selects the pinctrl driver for Xilinx Zynq.
+config PINCTRL_ZYNQMP
+ bool "Pinctrl driver for Xilinx ZynqMP"
+ depends on ARCH_ZYNQMP
+ select PINMUX
+ select GENERIC_PINCONF
+ help
+ This selects the pinctrl driver for Xilinx ZynqMP platform.
+ This driver will query the pin information from the firmware
+ and allow configuring the pins.
+ Configuration can include the mux function to select on those
+ pin(s)/group(s), and various pin configuration parameters
+ such as pull-up, slew rate, etc.
+
config PINCTRL_INGENIC
bool "Pinctrl driver for the Ingenic JZ47xx SoCs"
default MACH_INGENIC
diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
index f53933b2ff02..7e058739f0d5 100644
--- a/drivers/pinctrl/Makefile
+++ b/drivers/pinctrl/Makefile
@@ -43,6 +43,7 @@ obj-$(CONFIG_PINCTRL_TB10X) += pinctrl-tb10x.o
obj-$(CONFIG_PINCTRL_ST) += pinctrl-st.o
obj-$(CONFIG_PINCTRL_STMFX) += pinctrl-stmfx.o
obj-$(CONFIG_PINCTRL_ZYNQ) += pinctrl-zynq.o
+obj-$(CONFIG_PINCTRL_ZYNQMP) += pinctrl-zynqmp.o
obj-$(CONFIG_PINCTRL_INGENIC) += pinctrl-ingenic.o
obj-$(CONFIG_PINCTRL_RK805) += pinctrl-rk805.o
obj-$(CONFIG_PINCTRL_OCELOT) += pinctrl-ocelot.o
diff --git a/drivers/pinctrl/pinctrl-zynqmp.c b/drivers/pinctrl/pinctrl-zynqmp.c
new file mode 100644
index 000000000000..ec0a5d0e22d5
--- /dev/null
+++ b/drivers/pinctrl/pinctrl-zynqmp.c
@@ -0,0 +1,1031 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * ZynqMP pin controller
+ *
+ * Copyright (C) 2020 Xilinx, Inc.
+ *
+ * Sai Krishna Potthuri <[email protected]>
+ * Rajan Vaja <[email protected]>
+ */
+
+#include <linux/init.h>
+#include <linux/of_address.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <dt-bindings/pinctrl/pinctrl-zynqmp.h>
+#include <linux/platform_device.h>
+#include <linux/firmware/xlnx-zynqmp.h>
+#include "core.h"
+#include "pinctrl-utils.h"
+
+#define ZYNQMP_PIN_PREFIX "MIO"
+#define PINCTRL_GET_FUNC_NAME_RESP_LEN 16
+#define MAX_FUNC_NAME_LEN 16
+#define MAX_GROUP_PIN 50
+#define END_OF_FUNCTIONS "END_OF_FUNCTIONS"
+#define NUM_GROUPS_PER_RESP 6
+
+#define PINCTRL_GET_FUNC_GROUPS_RESP_LEN 12
+#define PINCTRL_GET_PIN_GROUPS_RESP_LEN 12
+#define NA_GROUP -1
+#define RESERVED_GROUP -2
+
+#define DRIVE_STRENGTH_2MA 2
+#define DRIVE_STRENGTH_4MA 4
+#define DRIVE_STRENGTH_8MA 8
+#define DRIVE_STRENGTH_12MA 12
+
+/**
+ * struct zynqmp_pmux_function - a pinmux function
+ * @name: Name of the pinmux function
+ * @groups: List of pingroups for this function
+ * @ngroups: Number of entries in @groups
+ * @node:` Firmware node matching with for function
+ *
+ * This structure holds information about pin control function
+ * and function group names supporting that function.
+ */
+struct zynqmp_pmux_function {
+ char name[MAX_FUNC_NAME_LEN];
+ const char * const *groups;
+ unsigned int ngroups;
+};
+
+/**
+ * struct zynqmp_pinctrl - driver data
+ * @pctrl: Pinctrl device
+ * @groups: Pingroups
+ * @ngroups: Number of @groups
+ * @funcs: Pinmux functions
+ * @nfuncs: Number of @funcs
+ *
+ * This struct is stored as driver data and used to retrieve
+ * information regarding pin control functions, groups and
+ * group pins.
+ */
+struct zynqmp_pinctrl {
+ struct pinctrl_dev *pctrl;
+ const struct zynqmp_pctrl_group *groups;
+ unsigned int ngroups;
+ const struct zynqmp_pmux_function *funcs;
+ unsigned int nfuncs;
+};
+
+/**
+ * struct zynqmp_pctrl_group - Pin control group info
+ * @name: Group name
+ * @pins: Group pin numbers
+ * @npins: Number of pins in group
+ */
+struct zynqmp_pctrl_group {
+ const char *name;
+ unsigned int pins[MAX_GROUP_PIN];
+ unsigned int npins;
+};
+
+/**
+ * enum zynqmp_pin_config_param - possible pin configuration parameters
+ * @PIN_CONFIG_IOSTANDARD: if the pin can select an IO standard,
+ * the argument to this parameter (on a
+ * custom format) tells the driver which
+ * alternative IO standard to use
+ */
+enum zynqmp_pin_config_param {
+ PIN_CONFIG_IOSTANDARD = PIN_CONFIG_END + 1,
+};
+
+static const struct pinconf_generic_params zynqmp_dt_params[] = {
+ {"io-standard", PIN_CONFIG_IOSTANDARD, IO_STANDARD_LVCMOS18},
+};
+
+#ifdef CONFIG_DEBUG_FS
+static const struct
+pin_config_item zynqmp_conf_items[ARRAY_SIZE(zynqmp_dt_params)] = {
+ PCONFDUMP(PIN_CONFIG_IOSTANDARD, "io-standard", NULL, true),
+};
+#endif
+
+static struct pinctrl_desc zynqmp_desc;
+
+/**
+ * zynqmp_pctrl_get_groups_count() - get group count
+ * @pctldev: Pincontrol device pointer.
+ *
+ * Get total groups count.
+ *
+ * Return: group count.
+ */
+static int zynqmp_pctrl_get_groups_count(struct pinctrl_dev *pctldev)
+{
+ struct zynqmp_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+
+ return pctrl->ngroups;
+}
+
+/**
+ * zynqmp_pctrl_get_group_name() - get group name
+ * @pctldev: Pincontrol device pointer.
+ * @selector: Group ID.
+ *
+ * Get gorup's name.
+ *
+ * Return: group name.
+ */
+static const char *zynqmp_pctrl_get_group_name(struct pinctrl_dev *pctldev,
+ unsigned int selector)
+{
+ struct zynqmp_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+
+ return pctrl->groups[selector].name;
+}
+
+/**
+ * zynqmp_pctrl_get_group_pins() - get group pins
+ * @pctldev: Pincontrol device pointer.
+ * @selector: Group ID.
+ * @pins: Pin numbers.
+ * @npins: Number of pins in group.
+ *
+ * Get gorup's pin count and pin number.
+ *
+ * Return: Success.
+ */
+static int zynqmp_pctrl_get_group_pins(struct pinctrl_dev *pctldev,
+ unsigned int selector,
+ const unsigned int **pins,
+ unsigned int *npins)
+{
+ struct zynqmp_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+
+ *pins = pctrl->groups[selector].pins;
+ *npins = pctrl->groups[selector].npins;
+
+ return 0;
+}
+
+static const struct pinctrl_ops zynqmp_pctrl_ops = {
+ .get_groups_count = zynqmp_pctrl_get_groups_count,
+ .get_group_name = zynqmp_pctrl_get_group_name,
+ .get_group_pins = zynqmp_pctrl_get_group_pins,
+ .dt_node_to_map = pinconf_generic_dt_node_to_map_all,
+ .dt_free_map = pinctrl_utils_free_map,
+};
+
+/**
+ * zynqmp_pinmux_request_pin() - Request a pin for muxing
+ * @pctldev: Pincontrol device pointer.
+ * @pin: Pin number.
+ *
+ * Request a pin from firmware for muxing.
+ *
+ * Return: 0 on success else error code.
+ */
+static int zynqmp_pinmux_request_pin(struct pinctrl_dev *pctldev,
+ unsigned int pin)
+{
+ int ret;
+
+ ret = zynqmp_pm_pinctrl_request(pin);
+ if (ret) {
+ dev_err(pctldev->dev, "request failed for pin %u\n", pin);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+/**
+ * zynqmp_pmux_get_functions_count() - get number of functions
+ * @pctldev: Pincontrol device pointer.
+ *
+ * Get total function count.
+ *
+ * Return: function count.
+ */
+static int zynqmp_pmux_get_functions_count(struct pinctrl_dev *pctldev)
+{
+ struct zynqmp_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+
+ return pctrl->nfuncs;
+}
+
+/**
+ * zynqmp_pmux_get_function_name() - get function name
+ * @pctldev: Pincontrol device pointer.
+ * @selector: Function ID.
+ *
+ * Get function's name.
+ *
+ * Return: function name.
+ */
+static const char *zynqmp_pmux_get_function_name(struct pinctrl_dev *pctldev,
+ unsigned int selector)
+{
+ struct zynqmp_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+
+ return pctrl->funcs[selector].name;
+}
+
+/**
+ * zynqmp_pmux_get_function_groups() - Get groups for the function
+ * @pctldev: Pincontrol device pointer.
+ * @selector: Function ID
+ * @groups: Group names.
+ * @num_groups: Number of function groups.
+ *
+ * Get function's group count and group names.
+ *
+ * Return: Success.
+ */
+static int zynqmp_pmux_get_function_groups(struct pinctrl_dev *pctldev,
+ unsigned int selector,
+ const char * const **groups,
+ unsigned * const num_groups)
+{
+ struct zynqmp_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+
+ *groups = pctrl->funcs[selector].groups;
+ *num_groups = pctrl->funcs[selector].ngroups;
+
+ return 0;
+}
+
+/**
+ * zynqmp_pinmux_set_mux() - Set requested function for the group
+ * @pctldev: Pincontrol device pointer.
+ * @function: Function ID.
+ * @group: Group ID.
+ *
+ * Loop though all pins of group and call firmware API
+ * to set requested function for all pins in group.
+ *
+ * Return: 0 on success else error code.
+ */
+static int zynqmp_pinmux_set_mux(struct pinctrl_dev *pctldev,
+ unsigned int function,
+ unsigned int group)
+{
+ struct zynqmp_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+ const struct zynqmp_pctrl_group *pgrp = &pctrl->groups[group];
+ int ret, i;
+
+ for (i = 0; i < pgrp->npins; i++) {
+ unsigned int pin = pgrp->pins[i];
+
+ ret = zynqmp_pm_pinctrl_set_function(pin, function);
+ if (ret) {
+ dev_err(pctldev->dev, "set mux failed for pin %u\n",
+ pin);
+ return -EIO;
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * zynqmp_pinmux_release_pin() - Release a pin
+ * @pctldev: Pincontrol device pointer.
+ * @pin: Pin number.
+ *
+ * Release a pin from firmware.
+ *
+ * Return: 0 on success else error code.
+ */
+static int zynqmp_pinmux_release_pin(struct pinctrl_dev *pctldev,
+ unsigned int pin)
+{
+ int ret;
+
+ ret = zynqmp_pm_pinctrl_release(pin);
+ if (ret) {
+ dev_err(pctldev->dev, "free pin failed for pin %u\n",
+ pin);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static const struct pinmux_ops zynqmp_pinmux_ops = {
+ .request = zynqmp_pinmux_request_pin,
+ .get_functions_count = zynqmp_pmux_get_functions_count,
+ .get_function_name = zynqmp_pmux_get_function_name,
+ .get_function_groups = zynqmp_pmux_get_function_groups,
+ .set_mux = zynqmp_pinmux_set_mux,
+ .free = zynqmp_pinmux_release_pin,
+};
+
+/**
+ * zynqmp_pinconf_cfg_get() - get config value for the pin
+ * @pctldev: Pin control device pointer.
+ * @pin: Pin number.
+ * @config: Value of config param.
+ *
+ * Get value of the requested configuration parameter for the
+ * given pin.
+ *
+ * Return: 0 on success else error code.
+ */
+static int zynqmp_pinconf_cfg_get(struct pinctrl_dev *pctldev,
+ unsigned int pin,
+ unsigned long *config)
+{
+ int ret;
+ unsigned int arg = 0, param = pinconf_to_config_param(*config);
+
+ if (pin >= zynqmp_desc.npins)
+ return -EOPNOTSUPP;
+
+ switch (param) {
+ case PIN_CONFIG_SLEW_RATE:
+ param = PM_PINCTRL_CONFIG_SLEW_RATE;
+ ret = zynqmp_pm_pinctrl_get_config(pin, param, &arg);
+ break;
+ case PIN_CONFIG_BIAS_PULL_UP:
+ param = PM_PINCTRL_CONFIG_PULL_CTRL;
+ ret = zynqmp_pm_pinctrl_get_config(pin, param, &arg);
+ if (arg != PM_PINCTRL_BIAS_PULL_UP)
+ return -EINVAL;
+
+ arg = 1;
+ break;
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ param = PM_PINCTRL_CONFIG_PULL_CTRL;
+ ret = zynqmp_pm_pinctrl_get_config(pin, param, &arg);
+ if (arg != PM_PINCTRL_BIAS_PULL_DOWN)
+ return -EINVAL;
+
+ arg = 1;
+ break;
+ case PIN_CONFIG_BIAS_DISABLE:
+ param = PM_PINCTRL_CONFIG_BIAS_STATUS;
+ ret = zynqmp_pm_pinctrl_get_config(pin, param, &arg);
+ if (arg != PM_PINCTRL_BIAS_DISABLE)
+ return -EINVAL;
+
+ arg = 1;
+ break;
+ case PIN_CONFIG_IOSTANDARD:
+ param = PM_PINCTRL_CONFIG_VOLTAGE_STATUS;
+ ret = zynqmp_pm_pinctrl_get_config(pin, param, &arg);
+ break;
+ case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
+ param = PM_PINCTRL_CONFIG_SCHMITT_CMOS;
+ ret = zynqmp_pm_pinctrl_get_config(pin, param, &arg);
+ break;
+ case PIN_CONFIG_DRIVE_STRENGTH:
+ param = PM_PINCTRL_CONFIG_DRIVE_STRENGTH;
+ ret = zynqmp_pm_pinctrl_get_config(pin, param, &arg);
+ switch (arg) {
+ case PM_PINCTRL_DRIVE_STRENGTH_2MA:
+ arg = DRIVE_STRENGTH_2MA;
+ break;
+ case PM_PINCTRL_DRIVE_STRENGTH_4MA:
+ arg = DRIVE_STRENGTH_4MA;
+ break;
+ case PM_PINCTRL_DRIVE_STRENGTH_8MA:
+ arg = DRIVE_STRENGTH_8MA;
+ break;
+ case PM_PINCTRL_DRIVE_STRENGTH_12MA:
+ arg = DRIVE_STRENGTH_12MA;
+ break;
+ default:
+ /* Invalid drive strength */
+ dev_warn(pctldev->dev,
+ "Invalid drive strength for pin %d\n",
+ pin);
+ return -EINVAL;
+ }
+ break;
+ default:
+ ret = -EOPNOTSUPP;
+ break;
+ }
+
+ param = pinconf_to_config_param(*config);
+ *config = pinconf_to_config_packed(param, arg);
+
+ return ret;
+}
+
+/**
+ * zynqmp_pinconf_cfg_set() - Set requested config for the pin
+ * @pctldev: Pincontrol device pointer.
+ * @pin: Pin number.
+ * @configs: Configuration to set.
+ * @num_configs: Number of configurations.
+ *
+ * Loop though all configurations and call firmware API
+ * to set requested configurations for the pin.
+ *
+ * Return: 0 on success else error code.
+ */
+static int zynqmp_pinconf_cfg_set(struct pinctrl_dev *pctldev,
+ unsigned int pin, unsigned long *configs,
+ unsigned int num_configs)
+{
+ int i, ret;
+
+ if (pin >= zynqmp_desc.npins)
+ return -EOPNOTSUPP;
+
+ for (i = 0; i < num_configs; i++) {
+ unsigned int param = pinconf_to_config_param(configs[i]);
+ unsigned int arg = pinconf_to_config_argument(configs[i]);
+ unsigned int value;
+
+ switch (param) {
+ case PIN_CONFIG_SLEW_RATE:
+ param = PM_PINCTRL_CONFIG_SLEW_RATE;
+ ret = zynqmp_pm_pinctrl_set_config(pin, param, arg);
+ break;
+ case PIN_CONFIG_BIAS_PULL_UP:
+ param = PM_PINCTRL_CONFIG_PULL_CTRL;
+ arg = PM_PINCTRL_BIAS_PULL_UP;
+ ret = zynqmp_pm_pinctrl_set_config(pin, param, arg);
+ break;
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ param = PM_PINCTRL_CONFIG_PULL_CTRL;
+ arg = PM_PINCTRL_BIAS_PULL_DOWN;
+ ret = zynqmp_pm_pinctrl_set_config(pin, param, arg);
+ break;
+ case PIN_CONFIG_BIAS_DISABLE:
+ param = PM_PINCTRL_CONFIG_BIAS_STATUS;
+ arg = PM_PINCTRL_BIAS_DISABLE;
+ ret = zynqmp_pm_pinctrl_set_config(pin, param, arg);
+ break;
+ case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
+ param = PM_PINCTRL_CONFIG_SCHMITT_CMOS;
+ ret = zynqmp_pm_pinctrl_set_config(pin, param, arg);
+ break;
+ case PIN_CONFIG_DRIVE_STRENGTH:
+ switch (arg) {
+ case DRIVE_STRENGTH_2MA:
+ value = PM_PINCTRL_DRIVE_STRENGTH_2MA;
+ break;
+ case DRIVE_STRENGTH_4MA:
+ value = PM_PINCTRL_DRIVE_STRENGTH_4MA;
+ break;
+ case DRIVE_STRENGTH_8MA:
+ value = PM_PINCTRL_DRIVE_STRENGTH_8MA;
+ break;
+ case DRIVE_STRENGTH_12MA:
+ value = PM_PINCTRL_DRIVE_STRENGTH_12MA;
+ break;
+ default:
+ /* Invalid drive strength */
+ dev_warn(pctldev->dev,
+ "Invalid drive strength for pin %d\n",
+ pin);
+ return -EINVAL;
+ }
+
+ param = PM_PINCTRL_CONFIG_DRIVE_STRENGTH;
+ ret = zynqmp_pm_pinctrl_set_config(pin, param, value);
+ break;
+ case PIN_CONFIG_IOSTANDARD:
+ param = PM_PINCTRL_CONFIG_VOLTAGE_STATUS;
+ ret = zynqmp_pm_pinctrl_get_config(pin, param, &value);
+
+ if (arg != value)
+ dev_warn(pctldev->dev,
+ "Invalid IO Standard requested for pin %d\n",
+ pin);
+
+ break;
+ case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
+ case PIN_CONFIG_LOW_POWER_MODE:
+ /*
+ * These cases are mentioned in dts but configurable
+ * registers are unknown. So falling through to ignore
+ * boot time warnings as of now.
+ */
+ ret = 0;
+ break;
+ default:
+ dev_warn(pctldev->dev,
+ "unsupported configuration parameter '%u'\n",
+ param);
+ ret = -EOPNOTSUPP;
+ break;
+ }
+
+ param = pinconf_to_config_param(configs[i]);
+ arg = pinconf_to_config_argument(configs[i]);
+ if (ret)
+ dev_warn(pctldev->dev,
+ "%s failed: pin %u param %u value %u\n",
+ __func__, pin, param, arg);
+ }
+
+ return 0;
+}
+
+/**
+ * zynqmp_pinconf_group_set() - Set requested config for the group
+ * @pctldev: Pincontrol device pointer.
+ * @selector: Group ID.
+ * @configs: Configuration to set.
+ * @num_configs: Number of configurations.
+ *
+ * Call function to set configs for each pin in group.
+ *
+ * Return: 0 on success else error code.
+ */
+static int zynqmp_pinconf_group_set(struct pinctrl_dev *pctldev,
+ unsigned int selector,
+ unsigned long *configs,
+ unsigned int num_configs)
+{
+ int i, ret;
+ struct zynqmp_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+ const struct zynqmp_pctrl_group *pgrp = &pctrl->groups[selector];
+
+ for (i = 0; i < pgrp->npins; i++) {
+ ret = zynqmp_pinconf_cfg_set(pctldev, pgrp->pins[i], configs,
+ num_configs);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct pinconf_ops zynqmp_pinconf_ops = {
+ .is_generic = true,
+ .pin_config_get = zynqmp_pinconf_cfg_get,
+ .pin_config_set = zynqmp_pinconf_cfg_set,
+ .pin_config_group_set = zynqmp_pinconf_group_set,
+};
+
+static struct pinctrl_desc zynqmp_desc = {
+ .name = "zynqmp_pinctrl",
+ .owner = THIS_MODULE,
+ .pctlops = &zynqmp_pctrl_ops,
+ .pmxops = &zynqmp_pinmux_ops,
+ .confops = &zynqmp_pinconf_ops,
+#ifdef CONFIG_DEBUG_FS
+ .custom_conf_items = zynqmp_conf_items,
+#endif
+};
+
+/**
+ * zynqmp_pinctrl_get_function_groups() - get groups for the function
+ * @fid: Function ID.
+ * @index: Group index.
+ * @groups: Groups data.
+ *
+ * Call firmware API to get groups for the given function.
+ *
+ * Return: 0 on success else error code.
+ */
+static int zynqmp_pinctrl_get_function_groups(u32 fid, u32 index, u16 *groups)
+{
+ struct zynqmp_pm_query_data qdata = {0};
+ u32 ret_payload[PAYLOAD_ARG_CNT];
+ int ret;
+
+ qdata.qid = PM_QID_PINCTRL_GET_FUNCTION_GROUPS;
+ qdata.arg1 = fid;
+ qdata.arg2 = index;
+
+ ret = zynqmp_pm_query_data(qdata, ret_payload);
+ if (ret)
+ return ret;
+
+ memcpy(groups, &ret_payload[1], PINCTRL_GET_FUNC_GROUPS_RESP_LEN);
+
+ return ret;
+}
+
+/**
+ * zynqmp_pinctrl_get_func_num_groups() - get number of groups in function
+ * @fid: Function ID.
+ * @ngroups: Number of groups in function.
+ *
+ * Call firmware API to get number of group in function.
+ *
+ * Return: 0 on success else error code.
+ */
+static int zynqmp_pinctrl_get_func_num_groups(u32 fid, unsigned int *ngroups)
+{
+ struct zynqmp_pm_query_data qdata = {0};
+ u32 ret_payload[PAYLOAD_ARG_CNT];
+ int ret;
+
+ qdata.qid = PM_QID_PINCTRL_GET_NUM_FUNCTION_GROUPS;
+ qdata.arg1 = fid;
+
+ ret = zynqmp_pm_query_data(qdata, ret_payload);
+ if (ret)
+ return ret;
+
+ *ngroups = ret_payload[1];
+
+ return ret;
+}
+
+/**
+ * zynqmp_pinctrl_prepare_func_groups() - prepare function and groups data
+ * @dev: Device pointer.
+ * @fid: Function ID.
+ * @func: Function data.
+ * @groups: Groups data.
+ *
+ * Query firmware to get group IDs for each function. Firmware returns
+ * group IDs. Based on gorup index for the function, group names in
+ * function are stored. For example, first gorup in "eth0" function
+ * is named as "eth0_0", second as "eth0_1" and so on.
+ *
+ * Based on group ID received from firmware, function stores name of
+ * group for that group ID. For an example, if "eth0" first group ID
+ * is x, groups[x] name will be stored as "eth0_0".
+ *
+ * Once done for each function, each function would have its group names,
+ * and each groups would also have their names.
+ *
+ * Return: 0 on success else error code.
+ */
+static int zynqmp_pinctrl_prepare_func_groups(struct device *dev, u32 fid,
+ struct zynqmp_pmux_function *func,
+ struct zynqmp_pctrl_group *groups)
+{
+ u16 resp[NUM_GROUPS_PER_RESP] = {0};
+ const char **fgroups;
+ int ret = 0, index, i;
+
+ fgroups = devm_kzalloc(dev, sizeof(*fgroups) * func->ngroups,
+ GFP_KERNEL);
+ if (!fgroups)
+ return -ENOMEM;
+
+ for (index = 0; index < func->ngroups; index += NUM_GROUPS_PER_RESP) {
+ ret = zynqmp_pinctrl_get_function_groups(fid, index, resp);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < NUM_GROUPS_PER_RESP; i++) {
+ if (resp[i] == (u16)NA_GROUP)
+ goto done;
+
+ if (resp[i] == (u16)RESERVED_GROUP)
+ continue;
+
+ fgroups[index + i] = devm_kasprintf(dev, GFP_KERNEL,
+ "%s_%d_grp",
+ func->name,
+ index + i);
+ groups[resp[i]].name = devm_kasprintf(dev, GFP_KERNEL,
+ "%s_%d_grp",
+ func->name,
+ index + i);
+ }
+ }
+done:
+ func->groups = fgroups;
+
+ return ret;
+}
+
+/**
+ * zynqmp_pinctrl_get_function_name() - get function name
+ * @fid: Function ID.
+ * @name: Function name
+ *
+ * Call firmware API to get name of given function.
+ *
+ * Return: 0 on success else error code.
+ */
+static int zynqmp_pinctrl_get_function_name(u32 fid, char *name)
+{
+ struct zynqmp_pm_query_data qdata = {0};
+ u32 ret_payload[PAYLOAD_ARG_CNT];
+
+ qdata.qid = PM_QID_PINCTRL_GET_FUNCTION_NAME;
+ qdata.arg1 = fid;
+
+ zynqmp_pm_query_data(qdata, ret_payload);
+ memcpy(name, ret_payload, PINCTRL_GET_FUNC_NAME_RESP_LEN);
+
+ return 0;
+}
+
+/**
+ * zynqmp_pinctrl_get_num_functions() - get number of supported functions
+ * @nfuncs: Number of functions.
+ *
+ * Call firmware API to get number of functions supported by system/board.
+ *
+ * Return: 0 on success else error code.
+ */
+static int zynqmp_pinctrl_get_num_functions(unsigned int *nfuncs)
+{
+ struct zynqmp_pm_query_data qdata = {0};
+ u32 ret_payload[PAYLOAD_ARG_CNT];
+ int ret;
+
+ qdata.qid = PM_QID_PINCTRL_GET_NUM_FUNCTIONS;
+
+ ret = zynqmp_pm_query_data(qdata, ret_payload);
+ if (ret)
+ return ret;
+
+ *nfuncs = ret_payload[1];
+
+ return ret;
+}
+
+/**
+ * zynqmp_pinctrl_get_pin_groups() - get groups for the pin
+ * @pin: Pin number.
+ * @index: Group index.
+ * @groups: Groups data.
+ *
+ * Call firmware API to get groups for the given pin.
+ *
+ * Return: 0 on success else error code.
+ */
+static int zynqmp_pinctrl_get_pin_groups(u32 pin, u32 index, u16 *groups)
+{
+ struct zynqmp_pm_query_data qdata = {0};
+ u32 ret_payload[PAYLOAD_ARG_CNT];
+ int ret;
+
+ qdata.qid = PM_QID_PINCTRL_GET_PIN_GROUPS;
+ qdata.arg1 = pin;
+ qdata.arg2 = index;
+
+ ret = zynqmp_pm_query_data(qdata, ret_payload);
+ if (ret)
+ return ret;
+
+ memcpy(groups, &ret_payload[1], PINCTRL_GET_PIN_GROUPS_RESP_LEN);
+
+ return ret;
+}
+
+/**
+ * zynqmp_pinctrl_group_add_pin() - add pin to given group
+ * @group: Group data.
+ * @pin: Pin number.
+ *
+ * Add pin number to respective group's pin array at end and
+ * increment pin count for the group.
+ *
+ * Return: 0 on success else error code.
+ */
+static void zynqmp_pinctrl_group_add_pin(struct zynqmp_pctrl_group *group,
+ unsigned int pin)
+{
+ group->pins[group->npins++] = pin;
+}
+
+/**
+ * zynqmp_pinctrl_create_pin_groups() - assign pins to respective groups
+ * @dev: Device pointer.
+ * @groups: Groups data.
+ * @pin: Pin number.
+ *
+ * Query firmware to get groups available for the given pin.
+ * Based on firmware response(group IDs for the pin), add
+ * pin number to respective group's pin array.
+ *
+ * Once all pins are queries, each groups would have its number
+ * of pins and pin numbers data.
+ *
+ * Return: 0 on success else error code.
+ */
+static int zynqmp_pinctrl_create_pin_groups(struct device *dev,
+ struct zynqmp_pctrl_group *groups,
+ unsigned int pin)
+{
+ int ret, i, index = 0;
+ u16 resp[NUM_GROUPS_PER_RESP] = {0};
+
+ do {
+ ret = zynqmp_pinctrl_get_pin_groups(pin, index, resp);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < NUM_GROUPS_PER_RESP; i++) {
+ if (resp[i] == (u16)NA_GROUP)
+ return ret;
+
+ if (resp[i] == (u16)RESERVED_GROUP)
+ continue;
+
+ zynqmp_pinctrl_group_add_pin(&groups[resp[i]], pin);
+ }
+ index += NUM_GROUPS_PER_RESP;
+ } while (1);
+
+ return ret;
+}
+
+/**
+ * zynqmp_pinctrl_prepare_group_pins() - prepare each group's pin data
+ * @dev: Device pointer.
+ * @groups: Groups data.
+ * @ngroups: Number of groups.
+ *
+ * Prepare pin number and number of pins data for each pins.
+ *
+ * Return: 0 on success else error code.
+ */
+static int zynqmp_pinctrl_prepare_group_pins(struct device *dev,
+ struct zynqmp_pctrl_group *groups,
+ unsigned int ngroups)
+{
+ unsigned int pin;
+ int ret = 0;
+
+ for (pin = 0; pin < zynqmp_desc.npins; pin++) {
+ ret = zynqmp_pinctrl_create_pin_groups(dev, groups, pin);
+ if (ret)
+ return ret;
+ }
+
+ return ret;
+}
+
+/**
+ * zynqmp_pinctrl_prepare_function_info() - prepare function info
+ * @dev: Device pointer.
+ * @pctrl: Pin control driver data.
+ *
+ * Query firmware for functions, groups and pin information and
+ * prepare pin control driver data.
+ *
+ * Query number of functions and number of function groups (number
+ * of groups in given function) to allocate required memory buffers
+ * for functions and groups. Once buffers are allocated to store
+ * functions and groups data, query and store required information
+ * (numbe of groups and group names for each function, number of
+ * pins and pin numbers for each group).
+ *
+ * Return: 0 on success else error code.
+ */
+static int zynqmp_pinctrl_prepare_function_info(struct device *dev,
+ struct zynqmp_pinctrl *pctrl)
+{
+ struct zynqmp_pmux_function *funcs;
+ struct zynqmp_pctrl_group *groups;
+ int ret, i;
+
+ ret = zynqmp_pinctrl_get_num_functions(&pctrl->nfuncs);
+ if (ret)
+ return ret;
+
+ funcs = devm_kzalloc(dev, sizeof(*funcs) * pctrl->nfuncs, GFP_KERNEL);
+ if (!funcs)
+ return -ENOMEM;
+
+ for (i = 0; i < pctrl->nfuncs; i++) {
+ zynqmp_pinctrl_get_function_name(i, funcs[i].name);
+
+ ret = zynqmp_pinctrl_get_func_num_groups(i, &funcs[i].ngroups);
+ if (ret)
+ return ret;
+
+ pctrl->ngroups += funcs[i].ngroups;
+ }
+
+ groups = devm_kzalloc(dev, sizeof(*groups) * pctrl->ngroups,
+ GFP_KERNEL);
+ if (!groups)
+ return -ENOMEM;
+
+ for (i = 0; i < pctrl->nfuncs; i++) {
+ ret = zynqmp_pinctrl_prepare_func_groups(dev, i, &funcs[i],
+ groups);
+ if (ret)
+ return ret;
+ }
+
+ ret = zynqmp_pinctrl_prepare_group_pins(dev, groups, pctrl->ngroups);
+ if (ret)
+ return ret;
+
+ pctrl->funcs = funcs;
+ pctrl->groups = groups;
+
+ return ret;
+}
+
+/**
+ * zynqmp_pinctrl_get_num_pins() - get number of pins in system
+ * @npins: Number of pins in system/board.
+ *
+ * Call firmware API to get number of pins.
+ *
+ * Return: 0 on success else error code.
+ */
+static int zynqmp_pinctrl_get_num_pins(unsigned int *npins)
+{
+ struct zynqmp_pm_query_data qdata = {0};
+ u32 ret_payload[PAYLOAD_ARG_CNT];
+ int ret;
+
+ qdata.qid = PM_QID_PINCTRL_GET_NUM_PINS;
+
+ ret = zynqmp_pm_query_data(qdata, ret_payload);
+ if (ret)
+ return ret;
+
+ *npins = ret_payload[1];
+
+ return ret;
+}
+
+/**
+ * zynqmp_pinctrl_prepare_pin_desc() - prepare pin description info
+ * @dev: Device pointer.
+ * @zynqmp_pins: Pin information.
+ * @npins: Number of pins.
+ *
+ * Query number of pins information from firmware and prepare pin
+ * description containing pin number and pin name.
+ *
+ * Return: 0 on success else error code.
+ */
+static int zynqmp_pinctrl_prepare_pin_desc(struct device *dev,
+ const struct pinctrl_pin_desc
+ **zynqmp_pins,
+ unsigned int *npins)
+{
+ struct pinctrl_pin_desc *pins, *pin;
+ int ret;
+ int i;
+
+ ret = zynqmp_pinctrl_get_num_pins(npins);
+ if (ret)
+ return ret;
+
+ pins = devm_kzalloc(dev, sizeof(*pins) * *npins, GFP_KERNEL);
+ if (!pins)
+ return -ENOMEM;
+
+ for (i = 0; i < *npins; i++) {
+ pin = &pins[i];
+ pin->number = i;
+ pin->name = devm_kasprintf(dev, GFP_KERNEL, "%s%d",
+ ZYNQMP_PIN_PREFIX, i);
+ }
+
+ *zynqmp_pins = pins;
+
+ return 0;
+}
+
+static int zynqmp_pinctrl_probe(struct platform_device *pdev)
+{
+ struct zynqmp_pinctrl *pctrl;
+ int ret;
+
+ pctrl = devm_kzalloc(&pdev->dev, sizeof(*pctrl), GFP_KERNEL);
+ if (!pctrl)
+ return -ENOMEM;
+
+ ret = zynqmp_pinctrl_prepare_pin_desc(&pdev->dev,
+ &zynqmp_desc.pins,
+ &zynqmp_desc.npins);
+ if (ret) {
+ dev_err(&pdev->dev, "%s() pin desc prepare fail with %d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ ret = zynqmp_pinctrl_prepare_function_info(&pdev->dev, pctrl);
+ if (ret) {
+ dev_err(&pdev->dev, "%s() function info prepare fail with %d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ pctrl->pctrl = pinctrl_register(&zynqmp_desc, &pdev->dev, pctrl);
+ if (IS_ERR(pctrl->pctrl)) {
+ ret = PTR_ERR(pctrl->pctrl);
+ return ret;
+ }
+
+ platform_set_drvdata(pdev, pctrl);
+
+ dev_info(&pdev->dev, "zynqmp pinctrl initialized\n");
+
+ return ret;
+}
+
+static const struct of_device_id zynqmp_pinctrl_of_match[] = {
+ { .compatible = "xlnx,zynqmp-pinctrl" },
+ { }
+};
+
+static struct platform_driver zynqmp_pinctrl_driver = {
+ .driver = {
+ .name = "zynqmp-pinctrl",
+ .of_match_table = zynqmp_pinctrl_of_match,
+ },
+ .probe = zynqmp_pinctrl_probe,
+};
+builtin_platform_driver(zynqmp_pinctrl_driver);
--
2.17.1
Hi,
2021年2月12日(金) 21:10 Sai Krishna Potthuri
<[email protected]>:
>
> Adding pinctrl support to query platform specific information (pins)
> from firmware.
>
> Signed-off-by: Sai Krishna Potthuri <[email protected]>
> Acked-by: Michal Simek <[email protected]>
> ---
> drivers/firmware/xilinx/zynqmp.c | 114 +++++++++++++++++++++++++++
> include/linux/firmware/xlnx-zynqmp.h | 90 +++++++++++++++++++++
> 2 files changed, 204 insertions(+)
>
> diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
> index efb8a66efc68..299c3d5a9ebd 100644
> --- a/drivers/firmware/xilinx/zynqmp.c
> +++ b/drivers/firmware/xilinx/zynqmp.c
> @@ -784,6 +784,120 @@ int zynqmp_pm_fpga_get_status(u32 *value)
> }
> EXPORT_SYMBOL_GPL(zynqmp_pm_fpga_get_status);
>
<snip>
> @@ -125,6 +131,12 @@ enum pm_query_id {
> PM_QID_CLOCK_GET_FIXEDFACTOR_PARAMS,
> PM_QID_CLOCK_GET_PARENTS,
> PM_QID_CLOCK_GET_ATTRIBUTES,
> + PM_QID_PINCTRL_GET_NUM_PINS = 6,
> + PM_QID_PINCTRL_GET_NUM_FUNCTIONS = 7,
> + PM_QID_PINCTRL_GET_NUM_FUNCTION_GROUPS = 8,
> + PM_QID_PINCTRL_GET_FUNCTION_NAME = 9,
> + PM_QID_PINCTRL_GET_FUNCTION_GROUPS = 10,
> + PM_QID_PINCTRL_GET_PIN_GROUPS = 11,
These do not have to have values, Because PM_QID_INVALID is 0.
> PM_QID_CLOCK_GET_NUM_CLOCKS = 12,
And you can drop value from this.
> PM_QID_CLOCK_GET_MAX_DIVISOR,
> };
> @@ -288,6 +300,44 @@ enum dll_reset_type {
> PM_DLL_RESET_PULSE,
> };
>
> +enum pm_pinctrl_config_param {
> + PM_PINCTRL_CONFIG_SLEW_RATE = 0,
> + PM_PINCTRL_CONFIG_BIAS_STATUS = 1,
> + PM_PINCTRL_CONFIG_PULL_CTRL = 2,
> + PM_PINCTRL_CONFIG_SCHMITT_CMOS = 3,
> + PM_PINCTRL_CONFIG_DRIVE_STRENGTH = 4,
> + PM_PINCTRL_CONFIG_VOLTAGE_STATUS = 5,
> + PM_PINCTRL_CONFIG_TRI_STATE = 6,
> + PM_PINCTRL_CONFIG_MAX = 7,
> +};
Same as above.
> +
> +enum pm_pinctrl_slew_rate {
> + PM_PINCTRL_SLEW_RATE_FAST = 0,
> + PM_PINCTRL_SLEW_RATE_SLOW = 1,
> +};
Same as above. Others are also specified.
> +
> +enum pm_pinctrl_bias_status {
> + PM_PINCTRL_BIAS_DISABLE = 0,
> + PM_PINCTRL_BIAS_ENABLE = 1,
> +};
Best regards,
Nobuhiro
--
Nobuhiro Iwamatsu
iwamatsu at {nigauri.org / debian.org}
GPG ID: 40AD1FA6
Hi,
2021年2月12日(金) 21:10 Sai Krishna Potthuri
<[email protected]>:
>
> Adding pinctrl driver for Xilinx ZynqMP platform.
> This driver queries pin information from firmware and registers
> pin control accordingly.
>
> Signed-off-by: Sai Krishna Potthuri <[email protected]>
> ---
> drivers/pinctrl/Kconfig | 13 +
> drivers/pinctrl/Makefile | 1 +
> drivers/pinctrl/pinctrl-zynqmp.c | 1031 ++++++++++++++++++++++++++++++
> 3 files changed, 1045 insertions(+)
> create mode 100644 drivers/pinctrl/pinctrl-zynqmp.c
>
> diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
> index 815095326e2d..25d3c7208975 100644
> --- a/drivers/pinctrl/Kconfig
> +++ b/drivers/pinctrl/Kconfig
> @@ -341,6 +341,19 @@ config PINCTRL_ZYNQ
> help
> This selects the pinctrl driver for Xilinx Zynq.
>
> +config PINCTRL_ZYNQMP
> + bool "Pinctrl driver for Xilinx ZynqMP"
> + depends on ARCH_ZYNQMP
> + select PINMUX
> + select GENERIC_PINCONF
> + help
> + This selects the pinctrl driver for Xilinx ZynqMP platform.
> + This driver will query the pin information from the firmware
> + and allow configuring the pins.
> + Configuration can include the mux function to select on those
> + pin(s)/group(s), and various pin configuration parameters
> + such as pull-up, slew rate, etc.
> +
> config PINCTRL_INGENIC
> bool "Pinctrl driver for the Ingenic JZ47xx SoCs"
> default MACH_INGENIC
> diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
> index f53933b2ff02..7e058739f0d5 100644
> --- a/drivers/pinctrl/Makefile
> +++ b/drivers/pinctrl/Makefile
> @@ -43,6 +43,7 @@ obj-$(CONFIG_PINCTRL_TB10X) += pinctrl-tb10x.o
> obj-$(CONFIG_PINCTRL_ST) += pinctrl-st.o
> obj-$(CONFIG_PINCTRL_STMFX) += pinctrl-stmfx.o
> obj-$(CONFIG_PINCTRL_ZYNQ) += pinctrl-zynq.o
> +obj-$(CONFIG_PINCTRL_ZYNQMP) += pinctrl-zynqmp.o
> obj-$(CONFIG_PINCTRL_INGENIC) += pinctrl-ingenic.o
> obj-$(CONFIG_PINCTRL_RK805) += pinctrl-rk805.o
> obj-$(CONFIG_PINCTRL_OCELOT) += pinctrl-ocelot.o
> diff --git a/drivers/pinctrl/pinctrl-zynqmp.c b/drivers/pinctrl/pinctrl-zynqmp.c
> new file mode 100644
> index 000000000000..ec0a5d0e22d5
> --- /dev/null
> +++ b/drivers/pinctrl/pinctrl-zynqmp.c
> @@ -0,0 +1,1031 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * ZynqMP pin controller
> + *
> + * Copyright (C) 2020 Xilinx, Inc.
> + *
> + * Sai Krishna Potthuri <[email protected]>
> + * Rajan Vaja <[email protected]>
> + */
<snip>
> +/**
> + * zynqmp_pinctrl_get_function_name() - get function name
> + * @fid: Function ID.
> + * @name: Function name
> + *
> + * Call firmware API to get name of given function.
> + *
> + * Return: 0 on success else error code.
> + */
> +static int zynqmp_pinctrl_get_function_name(u32 fid, char *name)
> +{
> + struct zynqmp_pm_query_data qdata = {0};
> + u32 ret_payload[PAYLOAD_ARG_CNT];
> +
> + qdata.qid = PM_QID_PINCTRL_GET_FUNCTION_NAME;
> + qdata.arg1 = fid;
> +
> + zynqmp_pm_query_data(qdata, ret_payload);
Please check the return value here as well as other functions.
I know that when we used zynqmp_pm_query_data with
PM_QID_PINCTRL_GET_FUNCTION_NAME,
it returns -22 error code.
How about adding processing with zynqmp_pm_query_data like
PM_QID_CLOCK_GET_NAME or
writing a comment here?
Best regards,
Nobuhiro
--
Nobuhiro Iwamatsu
iwamatsu at {nigauri.org / debian.org}
GPG ID: 40AD1FA6
Hi Noburiho,
On 2/28/21 1:17 AM, Nobuhiro Iwamatsu wrote:
> Hi,
>
> 2021年2月12日(金) 21:10 Sai Krishna Potthuri
> <[email protected]>:
>>
>> Adding pinctrl support to query platform specific information (pins)
>> from firmware.
>>
>> Signed-off-by: Sai Krishna Potthuri <[email protected]>
>> Acked-by: Michal Simek <[email protected]>
>> ---
>> drivers/firmware/xilinx/zynqmp.c | 114 +++++++++++++++++++++++++++
>> include/linux/firmware/xlnx-zynqmp.h | 90 +++++++++++++++++++++
>> 2 files changed, 204 insertions(+)
>>
>> diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
>> index efb8a66efc68..299c3d5a9ebd 100644
>> --- a/drivers/firmware/xilinx/zynqmp.c
>> +++ b/drivers/firmware/xilinx/zynqmp.c
>> @@ -784,6 +784,120 @@ int zynqmp_pm_fpga_get_status(u32 *value)
>> }
>> EXPORT_SYMBOL_GPL(zynqmp_pm_fpga_get_status);
>>
>
> <snip>
>
>> @@ -125,6 +131,12 @@ enum pm_query_id {
>> PM_QID_CLOCK_GET_FIXEDFACTOR_PARAMS,
>> PM_QID_CLOCK_GET_PARENTS,
>> PM_QID_CLOCK_GET_ATTRIBUTES,
>> + PM_QID_PINCTRL_GET_NUM_PINS = 6,
>> + PM_QID_PINCTRL_GET_NUM_FUNCTIONS = 7,
>> + PM_QID_PINCTRL_GET_NUM_FUNCTION_GROUPS = 8,
>> + PM_QID_PINCTRL_GET_FUNCTION_NAME = 9,
>> + PM_QID_PINCTRL_GET_FUNCTION_GROUPS = 10,
>> + PM_QID_PINCTRL_GET_PIN_GROUPS = 11,
>
> These do not have to have values, Because PM_QID_INVALID is 0.
>
>> PM_QID_CLOCK_GET_NUM_CLOCKS = 12,
>
> And you can drop value from this.
Please take a look at
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/include/linux/firmware/xlnx-zynqmp.h?h=v5.12-rc1&id=1077d4367ab3b97f6db2f66c87289af863652215
We are using explicit values as was recommended by Greg.
Thanks,
Michal
--
Michal Simek, Ing. (M.Eng), OpenPGP -> KeyID: FE3D1F91
w: http://www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel - Xilinx Microblaze
Maintainer of Linux kernel - Xilinx Zynq ARM and ZynqMP ARM64 SoCs
U-Boot custodian - Xilinx Microblaze/Zynq/ZynqMP/Versal SoCs
Hi Nobuhiro,
> -----Original Message-----
> From: Nobuhiro Iwamatsu <[email protected]>
> Sent: Sunday, February 28, 2021 6:19 AM
> To: Sai Krishna Potthuri <[email protected]>
> Cc: Linus Walleij <[email protected]>; Rob Herring
> <[email protected]>; Michal Simek <[email protected]>; Greg Kroah-
> Hartman <[email protected]>; linux ARM <linux-arm-
> [email protected]>; Linux Kernel Mailing List <linux-
> [email protected]>; [email protected]; linux-
> [email protected]; git <[email protected]>; [email protected]
> Subject: Re: [PATCH v3 3/3] pinctrl: Add Xilinx ZynqMP pinctrl driver support
>
> Hi,
>
> 2021年2月12日(金) 21:10 Sai Krishna Potthuri
> <[email protected]>:
> >
> > Adding pinctrl driver for Xilinx ZynqMP platform.
> > This driver queries pin information from firmware and registers pin
> > control accordingly.
> >
> > Signed-off-by: Sai Krishna Potthuri
> > <[email protected]>
> > ---
> > drivers/pinctrl/Kconfig | 13 +
> > drivers/pinctrl/Makefile | 1 +
> > drivers/pinctrl/pinctrl-zynqmp.c | 1031
> > ++++++++++++++++++++++++++++++
> > 3 files changed, 1045 insertions(+)
> > create mode 100644 drivers/pinctrl/pinctrl-zynqmp.c
> >
> > diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig index
> > 815095326e2d..25d3c7208975 100644
> > --- a/drivers/pinctrl/Kconfig
> > +++ b/drivers/pinctrl/Kconfig
> > @@ -341,6 +341,19 @@ config PINCTRL_ZYNQ
> > help
> > This selects the pinctrl driver for Xilinx Zynq.
> >
> > +config PINCTRL_ZYNQMP
> > + bool "Pinctrl driver for Xilinx ZynqMP"
> > + depends on ARCH_ZYNQMP
> > + select PINMUX
> > + select GENERIC_PINCONF
> > + help
> > + This selects the pinctrl driver for Xilinx ZynqMP platform.
> > + This driver will query the pin information from the firmware
> > + and allow configuring the pins.
> > + Configuration can include the mux function to select on those
> > + pin(s)/group(s), and various pin configuration parameters
> > + such as pull-up, slew rate, etc.
> > +
> > config PINCTRL_INGENIC
> > bool "Pinctrl driver for the Ingenic JZ47xx SoCs"
> > default MACH_INGENIC
> > diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile index
> > f53933b2ff02..7e058739f0d5 100644
> > --- a/drivers/pinctrl/Makefile
> > +++ b/drivers/pinctrl/Makefile
> > @@ -43,6 +43,7 @@ obj-$(CONFIG_PINCTRL_TB10X) += pinctrl-tb10x.o
> > obj-$(CONFIG_PINCTRL_ST) += pinctrl-st.o
> > obj-$(CONFIG_PINCTRL_STMFX) += pinctrl-stmfx.o
> > obj-$(CONFIG_PINCTRL_ZYNQ) += pinctrl-zynq.o
> > +obj-$(CONFIG_PINCTRL_ZYNQMP) += pinctrl-zynqmp.o
> > obj-$(CONFIG_PINCTRL_INGENIC) += pinctrl-ingenic.o
> > obj-$(CONFIG_PINCTRL_RK805) += pinctrl-rk805.o
> > obj-$(CONFIG_PINCTRL_OCELOT) += pinctrl-ocelot.o
> > diff --git a/drivers/pinctrl/pinctrl-zynqmp.c
> > b/drivers/pinctrl/pinctrl-zynqmp.c
> > new file mode 100644
> > index 000000000000..ec0a5d0e22d5
> > --- /dev/null
> > +++ b/drivers/pinctrl/pinctrl-zynqmp.c
> > @@ -0,0 +1,1031 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * ZynqMP pin controller
> > + *
> > + * Copyright (C) 2020 Xilinx, Inc.
> > + *
> > + * Sai Krishna Potthuri <[email protected]>
> > + * Rajan Vaja <[email protected]>
> > + */
>
> <snip>
>
> > +/**
> > + * zynqmp_pinctrl_get_function_name() - get function name
> > + * @fid: Function ID.
> > + * @name: Function name
> > + *
> > + * Call firmware API to get name of given function.
> > + *
> > + * Return: 0 on success else error code.
> > + */
> > +static int zynqmp_pinctrl_get_function_name(u32 fid, char *name) {
> > + struct zynqmp_pm_query_data qdata = {0};
> > + u32 ret_payload[PAYLOAD_ARG_CNT];
> > +
> > + qdata.qid = PM_QID_PINCTRL_GET_FUNCTION_NAME;
> > + qdata.arg1 = fid;
> > +
> > + zynqmp_pm_query_data(qdata, ret_payload);
>
> Please check the return value here as well as other functions.
>
> I know that when we used zynqmp_pm_query_data with
> PM_QID_PINCTRL_GET_FUNCTION_NAME, it returns -22 error code.
> How about adding processing with zynqmp_pm_query_data like
> PM_QID_CLOCK_GET_NAME or writing a comment here?
I will add comment for this kind of intentional cases.
Regards
Sai Krishna
>
> Best regards,
> Nobuhiro
>
> --
> Nobuhiro Iwamatsu
> iwamatsu at {nigauri.org / debian.org}
> GPG ID: 40AD1FA6
Hi,
2021年3月1日(月) 16:07 Michal Simek <[email protected]>:
>
> Hi Noburiho,
>
> On 2/28/21 1:17 AM, Nobuhiro Iwamatsu wrote:
> > Hi,
> >
> > 2021年2月12日(金) 21:10 Sai Krishna Potthuri
> > <[email protected]>:
> >>
> >> Adding pinctrl support to query platform specific information (pins)
> >> from firmware.
> >>
> >> Signed-off-by: Sai Krishna Potthuri <[email protected]>
> >> Acked-by: Michal Simek <[email protected]>
> >> ---
> >> drivers/firmware/xilinx/zynqmp.c | 114 +++++++++++++++++++++++++++
> >> include/linux/firmware/xlnx-zynqmp.h | 90 +++++++++++++++++++++
> >> 2 files changed, 204 insertions(+)
> >>
> >> diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
> >> index efb8a66efc68..299c3d5a9ebd 100644
> >> --- a/drivers/firmware/xilinx/zynqmp.c
> >> +++ b/drivers/firmware/xilinx/zynqmp.c
> >> @@ -784,6 +784,120 @@ int zynqmp_pm_fpga_get_status(u32 *value)
> >> }
> >> EXPORT_SYMBOL_GPL(zynqmp_pm_fpga_get_status);
> >>
> >
> > <snip>
> >
> >> @@ -125,6 +131,12 @@ enum pm_query_id {
> >> PM_QID_CLOCK_GET_FIXEDFACTOR_PARAMS,
> >> PM_QID_CLOCK_GET_PARENTS,
> >> PM_QID_CLOCK_GET_ATTRIBUTES,
> >> + PM_QID_PINCTRL_GET_NUM_PINS = 6,
> >> + PM_QID_PINCTRL_GET_NUM_FUNCTIONS = 7,
> >> + PM_QID_PINCTRL_GET_NUM_FUNCTION_GROUPS = 8,
> >> + PM_QID_PINCTRL_GET_FUNCTION_NAME = 9,
> >> + PM_QID_PINCTRL_GET_FUNCTION_GROUPS = 10,
> >> + PM_QID_PINCTRL_GET_PIN_GROUPS = 11,
> >
> > These do not have to have values, Because PM_QID_INVALID is 0.
> >
> >> PM_QID_CLOCK_GET_NUM_CLOCKS = 12,
> >
> > And you can drop value from this.
>
> Please take a look at
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/include/linux/firmware/xlnx-zynqmp.h?h=v5.12-rc1&id=1077d4367ab3b97f6db2f66c87289af863652215
>
> We are using explicit values as was recommended by Greg.
Oh, sorry.
I didn't see this comment. Thank you for this information.
>
> Thanks,
> Michal
>
Best regards,
Nobuhiro
--
Nobuhiro Iwamatsu
iwamatsu at {nigauri.org / debian.org}
GPG ID: 40AD1FA6
On Fri, 12 Feb 2021 17:37:22 +0530, Sai Krishna Potthuri wrote:
> Adding documentation and dt-bindings file which contains MIO pin
> configuration defines for Xilinx ZynqMP pinctrl driver.
>
> Signed-off-by: Sai Krishna Potthuri <[email protected]>
> ---
> .../bindings/pinctrl/xlnx,zynqmp-pinctrl.yaml | 339 ++++++++++++++++++
> include/dt-bindings/pinctrl/pinctrl-zynqmp.h | 19 +
> 2 files changed, 358 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/pinctrl/xlnx,zynqmp-pinctrl.yaml
> create mode 100644 include/dt-bindings/pinctrl/pinctrl-zynqmp.h
>
Reviewed-by: Rob Herring <[email protected]>