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From: Sia Jee Heng <jeeheng.sia@starfivetech.com>
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Subject: [RFC v3 08/16] clk: starfive: Add JH8100 North-West clock generator driver
Date: Wed, 10 Jan 2024 21:31:20 +0800
Message-Id: <20240110133128.286657-9-jeeheng.sia@starfivetech.com>
In-Reply-To: <20240110133128.286657-1-jeeheng.sia@starfivetech.com>
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Add support for JH8100 North-West (NWCRG) clock generator.

Signed-off-by: Sia Jee Heng <jeeheng.sia@starfivetech.com>
Reviewed-by: Ley Foon Tan <leyfoon.tan@starfivetech.com>
---
 drivers/clk/starfive/Makefile                 |   1 +
 drivers/clk/starfive/clk-starfive-jh8100-nw.c | 237 ++++++++++++++++++
 3 files changed, 245 insertions(+)
 create mode 100644 drivers/clk/starfive/clk-starfive-jh8100-nw.c

diff --git a/drivers/clk/starfive/Makefile b/drivers/clk/starfive/Makefile
index af6903c4f987..2ba07d3398f0 100644
--- a/drivers/clk/starfive/Makefile
+++ b/drivers/clk/starfive/Makefile
@@ -12,3 +12,4 @@ obj-$(CONFIG_CLK_STARFIVE_JH7110_ISP)	+= clk-starfive-jh7110-isp.o
 obj-$(CONFIG_CLK_STARFIVE_JH7110_VOUT)	+= clk-starfive-jh7110-vout.o
 
 obj-$(CONFIG_CLK_STARFIVE_JH8100_SYS)	+= clk-starfive-jh8100-sys.o
+obj-$(CONFIG_CLK_STARFIVE_JH8100_NW)	+= clk-starfive-jh8100-nw.o
diff --git a/drivers/clk/starfive/clk-starfive-jh8100-nw.c b/drivers/clk/starfive/clk-starfive-jh8100-nw.c
new file mode 100644
index 000000000000..018f5af6c777
--- /dev/null
+++ b/drivers/clk/starfive/clk-starfive-jh8100-nw.c
@@ -0,0 +1,237 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * StarFive JH8100 North-West Clock Driver
+ *
+ * Copyright (C) 2023 StarFive Technology Co., Ltd.
+ *
+ * Author: Jee Heng Sia <jeeheng.sia@starfivetech.com>
+ *
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include <dt-bindings/clock/starfive,jh8100-crg.h>
+
+#include "clk-starfive-jh8100.h"
+
+#define JH8100_NWCLK_NUM_CLKS				(JH8100_NWCLK_UART6_ICG_EN + 1)
+
+/* external clocks */
+#define JH8100_NWCLK_OSC				(JH8100_NWCLK_NUM_CLKS + 0)
+#define JH8100_NWCLK_APB_BUS				(JH8100_NWCLK_NUM_CLKS + 1)
+#define JH8100_NWCLK_APB_BUS_PER4			(JH8100_NWCLK_NUM_CLKS + 2)
+#define JH8100_NWCLK_SPI_CORE_100			(JH8100_NWCLK_NUM_CLKS + 3)
+#define JH8100_NWCLK_ISP_2X				(JH8100_NWCLK_NUM_CLKS + 4)
+#define JH8100_NWCLK_ISP__AXI				(JH8100_NWCLK_NUM_CLKS + 5)
+#define JH8100_NWCLK_VOUT_ROOT0				(JH8100_NWCLK_NUM_CLKS + 6)
+#define JH8100_NWCLK_VOUT_ROOT1				(JH8100_NWCLK_NUM_CLKS + 7)
+#define JH8100_NWCLK_VOUT_SCAN__ATS			(JH8100_NWCLK_NUM_CLKS + 8)
+#define JH8100_NWCLK_VOUT_DC__CORE			(JH8100_NWCLK_NUM_CLKS + 9)
+#define JH8100_NWCLK_VOUT__AXI				(JH8100_NWCLK_NUM_CLKS + 10)
+#define JH8100_NWCLK_AXI_400				(JH8100_NWCLK_NUM_CLKS + 11)
+#define JH8100_NWCLK_DVP_EXT				(JH8100_NWCLK_NUM_CLKS + 12)
+#define JH8100_NWCLK_ISP_DPHY_TAP_TCK_EXT		(JH8100_NWCLK_NUM_CLKS + 13)
+#define JH8100_NWCLK_GLB_EXT				(JH8100_NWCLK_NUM_CLKS + 14)
+#define JH8100_NWCLK_VOUT_MIPI_DPHY_TAP_TCK_EXT		(JH8100_NWCLK_NUM_CLKS + 15)
+#define JH8100_NWCLK_VOUT_EDP_TAP_TCK_EXT		(JH8100_NWCLK_NUM_CLKS + 16)
+#define JH8100_NWCLK_SPI_IN2_EXT			(JH8100_NWCLK_NUM_CLKS + 17)
+#define JH8100_NWCLK_PERH_ROOT_PREOSC			(JH8100_NWCLK_NUM_CLKS + 18)
+#define JH8100_NWCLK_AHB_VOUT				(JH8100_NWCLK_NUM_CLKS + 19)
+#define JH8100_NWCLK_PLL5_OUT				(JH8100_NWCLK_NUM_CLKS + 20)
+
+static const struct starfive_clk_data jh8100_nwcrg_clk_data[] = {
+	/* root */
+	STARFIVE__DIV(JH8100_NWCLK_PLL5_DIV2, "pll5_div2", 2, JH8100_NWCLK_PLL5_OUT),
+	STARFIVE_GDIV(JH8100_NWCLK_GCLK5, "gclk5", CLK_IS_CRITICAL, 120, JH8100_NWCLK_PLL5_DIV2),
+	/* gpio */
+	STARFIVE_GATE(JH8100_NWCLK_GPIO_100, "gpio_100", CLK_IS_CRITICAL, JH8100_NWCLK_PLL5_OUT),
+	STARFIVE_GATE(JH8100_NWCLK_GPIO_50, "gpio_50", CLK_IS_CRITICAL, JH8100_NWCLK_PLL5_OUT),
+	STARFIVE_GATE(JH8100_NWCLK_GPIO_150, "gpio_150", CLK_IS_CRITICAL, JH8100_NWCLK_PLL5_OUT),
+	STARFIVE_GDIV(JH8100_NWCLK_GPIO_60, "gpio_60", CLK_IS_CRITICAL, 30, JH8100_NWCLK_PLL5_OUT),
+	/* iomux */
+	STARFIVE_GATE(JH8100_NWCLK_IOMUX_WEST_PCLK, "iomux_west_pclk", 0,
+		      JH8100_NWCLK_APB_BUS_PER4),
+	/* i2c */
+	STARFIVE_GATE(JH8100_NWCLK_I2C6_APB, "i2c6_apb", 0, JH8100_NWCLK_APB_BUS_PER4),
+	STARFIVE_GATE(JH8100_NWCLK_I2C7_APB, "i2c7_apb", 0, JH8100_NWCLK_APB_BUS_PER4),
+	/* spi */
+	STARFIVE_GATE(JH8100_NWCLK_SPI2_APB, "spi2_apb", 0, JH8100_NWCLK_APB_BUS_PER4),
+	STARFIVE_GATE(JH8100_NWCLK_SPI2_CORE, "spi2_core", 0, JH8100_NWCLK_SPI_CORE_100),
+	STARFIVE__MUX(JH8100_NWCLK_SPI2_SCLK_IN, "spi2_sclk_in", 2,
+		      JH8100_NWCLK_SPI_IN2_EXT, JH8100_NWCLK_GPIO_100),
+	/* smbus */
+	STARFIVE_GATE(JH8100_NWCLK_SMBUS1_APB, "smbus1_apb", CLK_IGNORE_UNUSED,
+		      JH8100_NWCLK_APB_BUS_PER4),
+	STARFIVE_GDIV(JH8100_NWCLK_SMBUS1_CORE, "smbus1_core", CLK_IGNORE_UNUSED, 120,
+		      JH8100_NWCLK_PERH_ROOT_PREOSC),
+	/* isp */
+	STARFIVE__MUX(JH8100_NWCLK_ISP_DVP, "isp_dvp", 2, JH8100_NWCLK_DVP_EXT,
+		      JH8100_NWCLK_GPIO_150),
+	STARFIVE_GATE(JH8100_NWCLK_ISP_CORE_2X, "isp_core_2x", 0, JH8100_NWCLK_ISP_2X),
+	STARFIVE_GATE(JH8100_NWCLK_ISP_AXI, "isp_axi_nw", 0, JH8100_NWCLK_ISP__AXI),
+	STARFIVE__MUX(JH8100_NWCLK_ISP_DPHY_TAP_TCK, "isp_dphy_tap_tck", 2,
+		      JH8100_NWCLK_ISP_DPHY_TAP_TCK_EXT, JH8100_NWCLK_GLB_EXT),
+	STARFIVE_GATE(JH8100_NWCLK_FLEXNOC_ISPSLV, "flexnoc_ispslv", 0, JH8100_NWCLK_ISP__AXI),
+	/* vout */
+	STARFIVE_GATE(JH8100_NWCLK_VOUT_PIX0, "vout_pix0", CLK_IGNORE_UNUSED,
+		      JH8100_NWCLK_VOUT_ROOT0),
+	STARFIVE_GATE(JH8100_NWCLK_VOUT_PIX1, "vout_pix1", CLK_IGNORE_UNUSED,
+		      JH8100_NWCLK_VOUT_ROOT1),
+	STARFIVE_GATE(JH8100_NWCLK_VOUT_SCAN_ATS, "vout_scan_ats_nw",
+		      CLK_IGNORE_UNUSED, JH8100_NWCLK_VOUT_SCAN__ATS),
+	STARFIVE_GATE(JH8100_NWCLK_VOUT_DC_CORE, "vout_dc_core_nw",
+		      CLK_IGNORE_UNUSED, JH8100_NWCLK_VOUT_DC__CORE),
+	STARFIVE_GATE(JH8100_NWCLK_VOUT_APB, "vout_apb", CLK_IGNORE_UNUSED, JH8100_NWCLK_APB_BUS),
+	STARFIVE_GATE(JH8100_NWCLK_VOUT_DSI, "vout_dsi", CLK_IGNORE_UNUSED, JH8100_NWCLK_AXI_400),
+	STARFIVE_GATE(JH8100_NWCLK_VOUT_AHB, "vout_ahb", CLK_IGNORE_UNUSED, JH8100_NWCLK_AHB_VOUT),
+	STARFIVE_GATE(JH8100_NWCLK_VOUT_AXI, "vout_axi_nw", CLK_IGNORE_UNUSED,
+		      JH8100_NWCLK_VOUT__AXI),
+	STARFIVE__MUX(JH8100_NWCLK_VOUT_MIPI_DPHY_TAP_TCK, "vout_mipi_dphy_tap_tck", 2,
+		      JH8100_NWCLK_VOUT_MIPI_DPHY_TAP_TCK_EXT, JH8100_NWCLK_GLB_EXT),
+	STARFIVE__MUX(JH8100_NWCLK_VOUT_EDP_PHY_TAP_TCK, "vout_edp_phy_tap_tck", 2,
+		      JH8100_NWCLK_VOUT_EDP_TAP_TCK_EXT, JH8100_NWCLK_GLB_EXT),
+	/* uart */
+	STARFIVE__DIV(JH8100_NWCLK_UART5_CORE_PREOSC, "uart5_core_preosc", 131071,
+		      JH8100_NWCLK_PERH_ROOT_PREOSC),
+	STARFIVE_GATE(JH8100_NWCLK_UART5_APB, "uart5_apb", 0, JH8100_NWCLK_APB_BUS_PER4),
+	STARFIVE_GMUX(JH8100_NWCLK_UART5_CORE, "uart5_core", 0, 2,
+		      JH8100_NWCLK_OSC, JH8100_NWCLK_UART5_CORE_PREOSC),
+	STARFIVE__DIV(JH8100_NWCLK_UART6_CORE_PREOSC, "uart6_core_preosc", 131071,
+		      JH8100_NWCLK_PERH_ROOT_PREOSC),
+	STARFIVE_GATE(JH8100_NWCLK_UART6_APB, "uart6_apb", 0, JH8100_NWCLK_APB_BUS_PER4),
+	STARFIVE_GMUX(JH8100_NWCLK_UART6_CORE, "uart6_core", 0, 2,
+		      JH8100_NWCLK_OSC, JH8100_NWCLK_UART6_CORE_PREOSC),
+	/* icg_en */
+	STARFIVE_GATE(JH8100_NWCLK_SPI2_ICG_EN, "spi2_en", 0, JH8100_NWCLK_APB_BUS_PER4),
+	STARFIVE_GATE(JH8100_NWCLK_SMBUS1_ICG_EN, "smbus1_en", 0, JH8100_NWCLK_APB_BUS_PER4),
+	STARFIVE_GATE(JH8100_NWCLK_ISP_ICG_EN, "isp_en", 0, JH8100_NWCLK_ISP__AXI),
+	STARFIVE_GATE(JH8100_NWCLK_VOUT_ICG_EN, "vout_en", 0, JH8100_NWCLK_VOUT_ROOT0),
+	STARFIVE_GATE(JH8100_NWCLK_UART5_ICG_EN, "uart5_en", 0, JH8100_NWCLK_APB_BUS_PER4),
+	STARFIVE_GATE(JH8100_NWCLK_UART6_ICG_EN, "uart6_en", 0, JH8100_NWCLK_APB_BUS_PER4),
+};
+
+static struct clk_hw *jh8100_nwcrg_clk_get(struct of_phandle_args *clkspec, void *data)
+{
+	struct starfive_clk_priv *priv = data;
+	unsigned int idx = clkspec->args[0];
+
+	if (idx < JH8100_NWCLK_NUM_CLKS)
+		return &priv->reg[idx].hw;
+
+	return ERR_PTR(-EINVAL);
+}
+
+static int jh8100_nwcrg_probe(struct platform_device *pdev)
+{
+	struct starfive_clk_priv *priv;
+	unsigned int idx;
+	int ret;
+
+	priv = devm_kzalloc(&pdev->dev,
+			    struct_size(priv, reg, JH8100_NWCLK_NUM_CLKS),
+			    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);
+
+	for (idx = 0; idx < JH8100_NWCLK_NUM_CLKS; idx++) {
+		u32 max = jh8100_nwcrg_clk_data[idx].max;
+		struct clk_parent_data parents[4] = {};
+		struct clk_init_data init = {
+			.name = jh8100_nwcrg_clk_data[idx].name,
+			.ops = starfive_clk_ops(max),
+			.parent_data = parents,
+			.num_parents =
+				((max & STARFIVE_CLK_MUX_MASK) >> STARFIVE_CLK_MUX_SHIFT) + 1,
+			.flags = jh8100_nwcrg_clk_data[idx].flags,
+		};
+		struct starfive_clk *clk = &priv->reg[idx];
+		unsigned int i;
+
+		for (i = 0; i < init.num_parents; i++) {
+			unsigned int pidx = jh8100_nwcrg_clk_data[idx].parents[i];
+
+			if (pidx < JH8100_NWCLK_NUM_CLKS)
+				parents[i].hw = &priv->reg[pidx].hw;
+			else if (pidx == JH8100_NWCLK_OSC)
+				parents[i].fw_name = "osc";
+			else if (pidx == JH8100_NWCLK_APB_BUS)
+				parents[i].fw_name = "apb_bus";
+			else if (pidx == JH8100_NWCLK_APB_BUS_PER4)
+				parents[i].fw_name = "apb_bus_per4";
+			else if (pidx == JH8100_NWCLK_SPI_CORE_100)
+				parents[i].fw_name = "spi_core_100";
+			else if (pidx == JH8100_NWCLK_ISP_2X)
+				parents[i].fw_name = "isp_2x";
+			else if (pidx == JH8100_NWCLK_ISP__AXI)
+				parents[i].fw_name = "isp_axi";
+			else if (pidx == JH8100_NWCLK_VOUT_ROOT0)
+				parents[i].fw_name = "vout_root0";
+			else if (pidx == JH8100_NWCLK_VOUT_ROOT1)
+				parents[i].fw_name = "vout_root1";
+			else if (pidx == JH8100_NWCLK_VOUT_SCAN__ATS)
+				parents[i].fw_name = "vout_scan_ats";
+			else if (pidx == JH8100_NWCLK_VOUT_DC__CORE)
+				parents[i].fw_name = "vout_dc_core";
+			else if (pidx == JH8100_NWCLK_VOUT__AXI)
+				parents[i].fw_name = "vout_axi";
+			else if (pidx == JH8100_NWCLK_AXI_400)
+				parents[i].fw_name = "axi_400";
+			else if (pidx == JH8100_NWCLK_DVP_EXT)
+				parents[i].fw_name = "dvp-ext";
+			else if (pidx == JH8100_NWCLK_ISP_DPHY_TAP_TCK_EXT)
+				parents[i].fw_name = "isp-dphy-tap-tck-ext";
+			else if (pidx == JH8100_NWCLK_GLB_EXT)
+				parents[i].fw_name = "glb-ext-clk";
+			else if (pidx == JH8100_NWCLK_VOUT_MIPI_DPHY_TAP_TCK_EXT)
+				parents[i].fw_name = "vout-mipi-dphy-tap-tck-ext";
+			else if (pidx == JH8100_NWCLK_VOUT_EDP_TAP_TCK_EXT)
+				parents[i].fw_name = "vout-edp-tap-tck-ext";
+			else if (pidx == JH8100_NWCLK_SPI_IN2_EXT)
+				parents[i].fw_name = "spi-in2-ext";
+			else if (pidx == JH8100_NWCLK_PERH_ROOT_PREOSC)
+				parents[i].fw_name = "perh_root_preosc";
+			else if (pidx == JH8100_NWCLK_AHB_VOUT)
+				parents[i].fw_name = "ahb0";
+			else
+				parents[i].fw_name = "pll5";
+		}
+
+		clk->hw.init = &init;
+		clk->idx = idx;
+		clk->max_div = max & STARFIVE_CLK_DIV_MASK;
+
+		ret = devm_clk_hw_register(&pdev->dev, &clk->hw);
+		if (ret)
+			return ret;
+	}
+
+	ret = devm_of_clk_add_hw_provider(&pdev->dev, jh8100_nwcrg_clk_get, priv);
+	if (ret)
+		return ret;
+
+	return jh8100_reset_controller_register(priv, "rst-nw", 1);
+}
+
+static const struct of_device_id jh8100_nwcrg_match[] = {
+	{ .compatible = "starfive,jh8100-nwcrg" },
+	{ /* sentinel */ }
+};
+
+static struct platform_driver jh8100_nwcrg_driver = {
+	.driver = {
+		.name = "clk-starfive-jh8100-nw",
+		.of_match_table = jh8100_nwcrg_match,
+		.suppress_bind_attrs = true,
+	},
+};
+builtin_platform_driver_probe(jh8100_nwcrg_driver, jh8100_nwcrg_probe);
-- 
2.34.1