Date:   Thu, 23 Mar 2023 00:41:57 +0800
From:   David Yang <mmyangfl@...il.com>
To:     linux-clk@...r.kernel.org
Cc:     David Yang <mmyangfl@...il.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>, linux-kernel@...r.kernel.org
Subject: [PATCH v7 9/9] clk: hisilicon: Add CRG driver for Hi3798MV100 SoC

Add CRG driver for Hi3798MV100 SoC. CRG (Clock and Reset Generator) module
generates clock and reset signals used by other module blocks on SoC.

Signed-off-by: David Yang <mmyangfl@...il.com>
---
 drivers/clk/hisilicon/crg-hi3798.c | 249 +++++++++++++++++++++++++++++
 1 file changed, 249 insertions(+)

diff --git a/drivers/clk/hisilicon/crg-hi3798.c b/drivers/clk/hisilicon/crg-hi3798.c
index f329886c4..d083d49a5 100644
--- a/drivers/clk/hisilicon/crg-hi3798.c
+++ b/drivers/clk/hisilicon/crg-hi3798.c
@@ -7,6 +7,7 @@
 
 #include <dt-bindings/clock/histb-clock.h>
 
+#include <linux/clk-provider.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/of_device.h>
@@ -38,6 +39,9 @@
 #define HI3798_FIXED_166P5M		84
 #define HI3798_SDIO0_MUX			85
 #define HI3798_COMBPHY0_MUX		86
+#define HI3798_FIXED_3M				87
+#define HI3798_FIXED_15M			88
+#define HI3798_FIXED_83P3M			89
 
 #define HI3798_CRG_NR_CLKS			128
 
@@ -47,13 +51,16 @@ static const struct hisi_fixed_rate_clock hi3798_fixed_rate_clks[] = {
 	{ HISTB_OSC_CLK, "clk_osc", NULL, 0, 24000000, },
 	{ HISTB_APB_CLK, "clk_apb", NULL, 0, 100000000, },
 	{ HISTB_AHB_CLK, "clk_ahb", NULL, 0, 200000000, },
+	{ HI3798_FIXED_3M, "3m", NULL, 0, 3000000, },
 	{ HI3798_FIXED_12M, "12m", NULL, 0, 12000000, },
+	{ HI3798_FIXED_15M, "15m", NULL, 0, 15000000, },
 	{ HI3798_FIXED_24M, "24m", NULL, 0, 24000000, },
 	{ HI3798_FIXED_25M, "25m", NULL, 0, 25000000, },
 	{ HI3798_FIXED_48M, "48m", NULL, 0, 48000000, },
 	{ HI3798_FIXED_50M, "50m", NULL, 0, 50000000, },
 	{ HI3798_FIXED_60M, "60m", NULL, 0, 60000000, },
 	{ HI3798_FIXED_75M, "75m", NULL, 0, 75000000, },
+	{ HI3798_FIXED_83P3M, "83p3m", NULL, 0, 83333333, },
 	{ HI3798_FIXED_100M, "100m", NULL, 0, 100000000, },
 	{ HI3798_FIXED_150M, "150m", NULL, 0, 150000000, },
 	{ HI3798_FIXED_166P5M, "166p5m", NULL, 0, 165000000, },
@@ -61,6 +68,106 @@ static const struct hisi_fixed_rate_clock hi3798_fixed_rate_clks[] = {
 	{ HI3798_FIXED_250M, "250m", NULL, 0, 250000000, },
 };
 
+struct hi3798_complex_clock {
+	unsigned int	id;
+	const char	*name;
+	const char	*parent_name;
+	unsigned long	flags;
+	unsigned long	offset;
+	u32		mask;
+	u32		value;
+};
+
+struct hi3798_clk_complex {
+	struct clk_hw	hw;
+	void __iomem	*reg;
+	u32		mask;
+	u32		value;
+};
+
+#define to_complex_clk(_hw) container_of(_hw, struct hi3798_clk_complex, hw)
+
+static int hi3798_clk_complex_prepare(struct clk_hw *hw)
+{
+	struct hi3798_clk_complex *clk = to_complex_clk(hw);
+	u32 val;
+
+	val = readl_relaxed(clk->reg);
+	val &= ~(clk->mask);
+	val |= clk->value;
+	writel_relaxed(val, clk->reg);
+
+	return 0;
+}
+
+static void hi3798_clk_complex_unprepare(struct clk_hw *hw)
+{
+	struct hi3798_clk_complex *clk = to_complex_clk(hw);
+	u32 val;
+
+	val = readl_relaxed(clk->reg);
+	val &= ~(clk->mask);
+	writel_relaxed(val, clk->reg);
+}
+
+static int hi3798_clk_complex_is_prepared(struct clk_hw *hw)
+{
+	struct hi3798_clk_complex *clk = to_complex_clk(hw);
+	u32 val;
+
+	val = readl_relaxed(clk->reg);
+	return (val & clk->mask) == clk->value;
+}
+
+static const struct clk_ops hi3798_clk_complex_ops = {
+	.prepare = hi3798_clk_complex_prepare,
+	.unprepare = hi3798_clk_complex_unprepare,
+	.is_prepared = hi3798_clk_complex_is_prepared,
+};
+
+static int hi3798_clk_register_complex(struct device *dev,
+				       const void *clocks, int nums,
+				       struct hisi_clock_data *data)
+{
+	const struct hi3798_complex_clock *clks = clocks;
+	void __iomem *base = data->base;
+	int i;
+
+	for (i = 0; i < nums; i++) {
+		struct hi3798_clk_complex *p_clk;
+		struct clk_init_data init;
+		int ret;
+
+		p_clk = devm_kzalloc(dev, sizeof(*p_clk), GFP_KERNEL);
+		if (!p_clk)
+			return -ENOMEM;
+
+		init.name = clks[i].name;
+		init.ops = &hi3798_clk_complex_ops;
+
+		init.flags = 0;
+		init.parent_names =
+			(clks[i].parent_name ? &clks[i].parent_name : NULL);
+		init.num_parents = (clks[i].parent_name ? 1 : 0);
+
+		p_clk->reg = base + clks[i].offset;
+		p_clk->mask = clks[i].mask;
+		p_clk->value = clks[i].value;
+		p_clk->hw.init = &init;
+
+		ret = devm_clk_hw_register(dev, &p_clk->hw);
+		if (ret) {
+			pr_err("%s: failed to register clock %s\n",
+			       __func__, clks[i].name);
+			return ret;
+		}
+
+		data->clk_data->hws[clks[i].id] = &p_clk->hw;
+	}
+
+	return 0;
+}
+
 /* hi3798CV200 */
 
 static const char *const hi3798cv200_mmc_mux_p[] = {
@@ -225,11 +332,153 @@ static const struct hisi_clocks hi3798cv200_sysctrl_clks = {
 	.gate_clks_num = ARRAY_SIZE(hi3798cv200_sysctrl_gate_clks),
 };
 
+/* hi3798MV100 */
+
+static const char *const hi3798mv100_mmc_mux_p[] = {
+		"75m", "100m", "50m", "15m" };
+static u32 hi3798mv100_mmc_mux_table[] = {0, 1, 2, 3};
+
+static struct hisi_mux_clock hi3798mv100_mux_clks[] = {
+	{ HI3798_MMC_MUX, "mmc_mux", hi3798mv100_mmc_mux_p,
+		ARRAY_SIZE(hi3798mv100_mmc_mux_p), CLK_SET_RATE_PARENT,
+		0xa0, 8, 2, 0, hi3798mv100_mmc_mux_table, },
+	{ HI3798_SDIO0_MUX, "sdio0_mux", hi3798mv100_mmc_mux_p,
+		ARRAY_SIZE(hi3798mv100_mmc_mux_p), CLK_SET_RATE_PARENT,
+		0x9c, 8, 2, 0, hi3798mv100_mmc_mux_table, },
+};
+
+static const struct hisi_gate_clock hi3798mv100_gate_clks[] = {
+	/* NAND */
+	/* hi3798MV100 NAND driver does not get into mainline yet,
+	 * expose these clocks when it gets ready */
+	/* { HISTB_NAND_CLK, "clk_nand", "clk_apb",
+		CLK_SET_RATE_PARENT, 0x60, 0, 0, }, */
+	/* UART */
+	{ HISTB_UART1_CLK, "clk_uart1", "3m",
+		CLK_SET_RATE_PARENT | CLK_IS_CRITICAL, 0x68, 0, 0, },
+	{ HISTB_UART2_CLK, "clk_uart2", "83p3m",
+		CLK_SET_RATE_PARENT, 0x68, 4, 0, },
+	/* I2C */
+	{ HISTB_I2C0_CLK, "clk_i2c0", "clk_apb",
+		CLK_SET_RATE_PARENT, 0x6C, 4, 0, },
+	{ HISTB_I2C1_CLK, "clk_i2c1", "clk_apb",
+		CLK_SET_RATE_PARENT, 0x6C, 8, 0, },
+	{ HISTB_I2C2_CLK, "clk_i2c2", "clk_apb",
+		CLK_SET_RATE_PARENT, 0x6C, 12, 0, },
+	/* SPI */
+	{ HISTB_SPI0_CLK, "clk_spi0", "clk_apb",
+		CLK_SET_RATE_PARENT, 0x70, 0, 0, },
+	/* SDIO */
+	{ HISTB_SDIO0_BIU_CLK, "clk_sdio0_biu", "200m",
+		CLK_SET_RATE_PARENT, 0x9c, 0, 0, },
+	{ HISTB_SDIO0_CIU_CLK, "clk_sdio0_ciu", "sdio0_mux",
+		CLK_SET_RATE_PARENT, 0x9c, 1, 0, },
+	/* EMMC */
+	{ HISTB_MMC_BIU_CLK, "clk_mmc_biu", "200m",
+		CLK_SET_RATE_PARENT, 0xa0, 0, 0, },
+	{ HISTB_MMC_CIU_CLK, "clk_mmc_ciu", "mmc_mux",
+		CLK_SET_RATE_PARENT, 0xa0, 1, 0, },
+	/* USB2 */
+	{ HISTB_USB2_BUS_CLK, "clk_u2_bus", "clk_ahb",
+		CLK_SET_RATE_PARENT, 0xb8, 0, 0, },
+	{ HISTB_USB2_PHY_CLK, "clk_u2_phy", "60m",
+		CLK_SET_RATE_PARENT, 0xb8, 4, 0, },
+	{ HISTB_USB2_12M_CLK, "clk_u2_12m", "12m",
+		CLK_SET_RATE_PARENT, 0xb8, 2, 0 },
+	{ HISTB_USB2_48M_CLK, "clk_u2_48m", "48m",
+		CLK_SET_RATE_PARENT, 0xb8, 1, 0 },
+	{ HISTB_USB2_UTMI_CLK, "clk_u2_utmi", "60m",
+		CLK_SET_RATE_PARENT, 0xb8, 5, 0 },
+	{ HISTB_USB2_UTMI_CLK1, "clk_u2_utmi1", "60m",
+		CLK_SET_RATE_PARENT, 0xb8, 6, 0 },
+	{ HISTB_USB2_OTG_UTMI_CLK, "clk_u2_otg_utmi", "60m",
+		CLK_SET_RATE_PARENT, 0xb8, 3, 0 },
+	{ HISTB_USB2_PHY1_REF_CLK, "clk_u2_phy1_ref", "24m",
+		CLK_SET_RATE_PARENT, 0xbc, 0, 0 },
+	{ HISTB_USB2_PHY2_REF_CLK, "clk_u2_phy2_ref", "24m",
+		CLK_SET_RATE_PARENT, 0xbc, 2, 0 },
+	/* USB2 2 */
+	{ HISTB_USB2_2_BUS_CLK, "clk_u2_2_bus", "clk_ahb",
+		CLK_SET_RATE_PARENT, 0x198, 0, 0, },
+	{ HISTB_USB2_2_PHY_CLK, "clk_u2_2_phy", "60m",
+		CLK_SET_RATE_PARENT, 0x198, 4, 0, },
+	{ HISTB_USB2_2_12M_CLK, "clk_u2_2_12m", "12m",
+		CLK_SET_RATE_PARENT, 0x198, 2, 0 },
+	{ HISTB_USB2_2_48M_CLK, "clk_u2_2_48m", "48m",
+		CLK_SET_RATE_PARENT, 0x198, 1, 0 },
+	{ HISTB_USB2_2_UTMI_CLK, "clk_u2_2_utmi", "60m",
+		CLK_SET_RATE_PARENT, 0x198, 5, 0 },
+	{ HISTB_USB2_2_UTMI_CLK1, "clk_u2_2_utmi1", "60m",
+		CLK_SET_RATE_PARENT, 0x198, 6, 0 },
+	{ HISTB_USB2_2_OTG_UTMI_CLK, "clk_u2_2_otg_utmi", "60m",
+		CLK_SET_RATE_PARENT, 0x198, 3, 0 },
+	{ HISTB_USB2_2_PHY1_REF_CLK, "clk_u2_2_phy1_ref", "24m",
+		CLK_SET_RATE_PARENT, 0x190, 0, 0 },
+	{ HISTB_USB2_2_PHY2_REF_CLK, "clk_u2_2_phy2_ref", "24m",
+		CLK_SET_RATE_PARENT, 0x190, 2, 0 },
+	/* USB3 */
+	{ HISTB_USB3_BUS_CLK, "clk_u3_bus", NULL,
+		CLK_SET_RATE_PARENT, 0xb0, 0, 0 },
+	{ HISTB_USB3_UTMI_CLK, "clk_u3_utmi", NULL,
+		CLK_SET_RATE_PARENT, 0xb0, 4, 0 },
+	{ HISTB_USB3_PIPE_CLK, "clk_u3_pipe", NULL,
+		CLK_SET_RATE_PARENT, 0xb0, 3, 0 },
+	{ HISTB_USB3_SUSPEND_CLK, "clk_u3_suspend", NULL,
+		CLK_SET_RATE_PARENT, 0xb0, 2, 0 },
+	/* GPU */
+	{ HISTB_GPU_BUS_CLK, "clk_gpu", "200m",
+		CLK_SET_RATE_PARENT, 0xd4, 0, 0 },
+	/* FEPHY */
+	{ HISTB_FEPHY_CLK, "clk_fephy", "25m",
+		CLK_SET_RATE_PARENT, 0x120, 0, 0, },
+};
+
+static const struct hi3798_complex_clock hi3798mv100_complex_clks[] = {
+	{ HISTB_ETH0_MAC_CLK, "clk_mac0", NULL,
+		CLK_SET_RATE_PARENT, 0xcc, 0xf, 0xb, },
+	{ HISTB_GPU_CORE_CLK, "clk_gpu_gp", "200m",
+		CLK_SET_RATE_PARENT, 0xd4, 0x700, 0x700, },
+};
+
+static const struct hisi_clocks hi3798mv100_crg_clks = {
+	.nr = HI3798_CRG_NR_CLKS,
+	.fixed_rate_clks = hi3798_fixed_rate_clks,
+	.fixed_rate_clks_num = ARRAY_SIZE(hi3798_fixed_rate_clks),
+	.gate_clks = hi3798mv100_gate_clks,
+	.gate_clks_num = ARRAY_SIZE(hi3798mv100_gate_clks),
+	.mux_clks = hi3798mv100_mux_clks,
+	.mux_clks_num = ARRAY_SIZE(hi3798mv100_mux_clks),
+	.phase_clks = hi3798cv200_phase_clks,
+	.phase_clks_num = ARRAY_SIZE(hi3798cv200_phase_clks),
+	.customized_clks = hi3798mv100_complex_clks,
+	.customized_clks_num = ARRAY_SIZE(hi3798mv100_complex_clks),
+	.clk_register_customized = hi3798_clk_register_complex,
+};
+
+static const struct hisi_gate_clock hi3798mv100_sysctrl_gate_clks[] = {
+	{ HISTB_IR_CLK, "clk_ir", "24m",
+		CLK_SET_RATE_PARENT, 0x48, 4, 0, },
+	{ HISTB_TIMER01_CLK, "clk_timer01", "24m",
+		CLK_SET_RATE_PARENT, 0x48, 6, 0, },
+	{ HISTB_UART0_CLK, "clk_uart0", "83p3m",
+		CLK_SET_RATE_PARENT, 0x48, 12, 0, },
+};
+
+static const struct hisi_clocks hi3798mv100_sysctrl_clks = {
+	.nr = HI3798_SYSCTRL_NR_CLKS,
+	.gate_clks = hi3798mv100_sysctrl_gate_clks,
+	.gate_clks_num = ARRAY_SIZE(hi3798mv100_sysctrl_gate_clks),
+};
+
 static const struct of_device_id hi3798_crg_match_table[] = {
 	{ .compatible = "hisilicon,hi3798cv200-crg",
 		.data = &hi3798cv200_crg_clks },
 	{ .compatible = "hisilicon,hi3798cv200-sysctrl",
 		.data = &hi3798cv200_sysctrl_clks },
+	{ .compatible = "hisilicon,hi3798mv100-crg",
+		.data = &hi3798mv100_crg_clks },
+	{ .compatible = "hisilicon,hi3798mv100-sysctrl",
+		.data = &hi3798mv100_sysctrl_clks },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, hi3798_crg_match_table);
-- 
2.39.2

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