u-boot/drivers/clk/imx/clk-imx8mn.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright 2019 NXP
 * Peng Fan <peng.fan@nxp.com>
 */

#include <common.h>
#include <clk.h>
#include <clk-uclass.h>
#include <dm.h>
#include <asm/arch/clock.h>
#include <asm/arch/imx-regs.h>
#include <dt-bindings/clock/imx8mn-clock.h>

#include "clk.h"

#define PLL_1416X_RATE(_rate, _m, _p, _s)		\
	{						\
		.rate	=	(_rate),		\
		.mdiv	=	(_m),			\
		.pdiv	=	(_p),			\
		.sdiv	=	(_s),			\
	}

#define PLL_1443X_RATE(_rate, _m, _p, _s, _k)		\
	{						\
		.rate	=	(_rate),		\
		.mdiv	=	(_m),			\
		.pdiv	=	(_p),			\
		.sdiv	=	(_s),			\
		.kdiv	=	(_k),			\
	}

static const struct imx_pll14xx_rate_table imx8mn_pll1416x_tbl[] = {
	PLL_1416X_RATE(1800000000U, 225, 3, 0),
	PLL_1416X_RATE(1600000000U, 200, 3, 0),
	PLL_1416X_RATE(1200000000U, 300, 3, 1),
	PLL_1416X_RATE(1000000000U, 250, 3, 1),
	PLL_1416X_RATE(800000000U,  200, 3, 1),
	PLL_1416X_RATE(750000000U,  250, 2, 2),
	PLL_1416X_RATE(700000000U,  350, 3, 2),
	PLL_1416X_RATE(600000000U,  300, 3, 2),
};

static const struct imx_pll14xx_rate_table imx8mn_drampll_tbl[] = {
	PLL_1443X_RATE(650000000U, 325, 3, 2, 0),
};

static struct imx_pll14xx_clk imx8mn_dram_pll __initdata = {
		.type = PLL_1443X,
		.rate_table = imx8mn_drampll_tbl,
		.rate_count = ARRAY_SIZE(imx8mn_drampll_tbl),
};

static struct imx_pll14xx_clk imx8mn_arm_pll __initdata = {
		.type = PLL_1416X,
		.rate_table = imx8mn_pll1416x_tbl,
		.rate_count = ARRAY_SIZE(imx8mn_pll1416x_tbl),
};

static struct imx_pll14xx_clk imx8mn_sys_pll __initdata = {
		.type = PLL_1416X,
		.rate_table = imx8mn_pll1416x_tbl,
		.rate_count = ARRAY_SIZE(imx8mn_pll1416x_tbl),
};

static const char *pll_ref_sels[] = { "clock-osc-24m", "dummy", "dummy", "dummy", };
static const char *dram_pll_bypass_sels[] = {"dram_pll", "dram_pll_ref_sel", };
static const char *arm_pll_bypass_sels[] = {"arm_pll", "arm_pll_ref_sel", };
static const char *sys_pll1_bypass_sels[] = {"sys_pll1", "sys_pll1_ref_sel", };
static const char *sys_pll2_bypass_sels[] = {"sys_pll2", "sys_pll2_ref_sel", };
static const char *sys_pll3_bypass_sels[] = {"sys_pll3", "sys_pll3_ref_sel", };

static const char *imx8mn_a53_sels[] = {"clock-osc-24m", "arm_pll_out", "sys_pll2_500m", "sys_pll2_1000m",
					"sys_pll1_800m", "sys_pll1_400m", "audio_pll1_out", "sys_pll3_out", };

static const char *imx8mn_ahb_sels[] = {"clock-osc-24m", "sys_pll1_133m", "sys_pll1_800m", "sys_pll1_400m",
					"sys_pll2_125m", "sys_pll3_out", "audio_pll1_out", "video_pll1_out", };

static const char *imx8mn_enet_axi_sels[] = {"clock-osc-24m", "sys_pll1_266m", "sys_pll1_800m", "sys_pll2_250m",
					     "sys_pll2_200m", "audio_pll1_out", "video_pll1_out", "sys_pll3_out", };

static const char *imx8mn_nand_usdhc_sels[] = {"clock-osc-24m", "sys_pll1_266m", "sys_pll1_800m", "sys_pll2_200m",
					       "sys_pll1_133m", "sys_pll3_out", "sys_pll2_250m", "audio_pll1_out", };

static const char *imx8mn_usdhc1_sels[] = {"clock-osc-24m", "sys_pll1_400m", "sys_pll1_800m", "sys_pll2_500m",
					   "sys_pll3_out", "sys_pll1_266m", "audio_pll2_out", "sys_pll1_100m", };

static const char *imx8mn_usdhc2_sels[] = {"clock-osc-24m", "sys_pll1_400m", "sys_pll1_800m", "sys_pll2_500m",
					   "sys_pll3_out", "sys_pll1_266m", "audio_pll2_out", "sys_pll1_100m", };

static const char *imx8mn_i2c1_sels[] = {"clock-osc-24m", "sys_pll1_160m", "sys_pll2_50m", "sys_pll3_out", "audio_pll1_out",
					 "video_pll1_out", "audio_pll2_out", "sys_pll1_133m", };

static const char *imx8mn_i2c2_sels[] = {"clock-osc-24m", "sys_pll1_160m", "sys_pll2_50m", "sys_pll3_out", "audio_pll1_out",
					 "video_pll1_out", "audio_pll2_out", "sys_pll1_133m", };

static const char *imx8mn_i2c3_sels[] = {"clock-osc-24m", "sys_pll1_160m", "sys_pll2_50m", "sys_pll3_out", "audio_pll1_out",
					 "video_pll1_out", "audio_pll2_out", "sys_pll1_133m", };

static const char *imx8mn_i2c4_sels[] = {"clock-osc-24m", "sys_pll1_160m", "sys_pll2_50m", "sys_pll3_out", "audio_pll1_out",
					 "video_pll1_out", "audio_pll2_out", "sys_pll1_133m", };

static const char *imx8mn_wdog_sels[] = {"clock-osc-24m", "sys_pll1_133m", "sys_pll1_160m", "vpu_pll_out",
					 "sys_pll2_125m", "sys_pll3_out", "sys_pll1_80m", "sys_pll2_166m", };

static const char *imx8mn_usdhc3_sels[] = {"clock-osc-24m", "sys_pll1_400m", "sys_pll1_800m", "sys_pll2_500m",
					   "sys_pll3_out", "sys_pll1_266m", "audio_pll2_clk", "sys_pll1_100m", };

static ulong imx8mn_clk_get_rate(struct clk *clk)
{
	struct clk *c;
	int ret;

	debug("%s(#%lu)\n", __func__, clk->id);

	ret = clk_get_by_id(clk->id, &c);
	if (ret)
		return ret;

	return clk_get_rate(c);
}

static ulong imx8mn_clk_set_rate(struct clk *clk, unsigned long rate)
{
	struct clk *c;
	int ret;

	debug("%s(#%lu), rate: %lu\n", __func__, clk->id, rate);

	ret = clk_get_by_id(clk->id, &c);
	if (ret)
		return ret;

	return clk_set_rate(c, rate);
}

static int __imx8mn_clk_enable(struct clk *clk, bool enable)
{
	struct clk *c;
	int ret;

	debug("%s(#%lu) en: %d\n", __func__, clk->id, enable);

	ret = clk_get_by_id(clk->id, &c);
	if (ret)
		return ret;

	if (enable)
		ret = clk_enable(c);
	else
		ret = clk_disable(c);

	return ret;
}

static int imx8mn_clk_disable(struct clk *clk)
{
	return __imx8mn_clk_enable(clk, 0);
}

static int imx8mn_clk_enable(struct clk *clk)
{
	return __imx8mn_clk_enable(clk, 1);
}

static struct clk_ops imx8mn_clk_ops = {
	.set_rate = imx8mn_clk_set_rate,
	.get_rate = imx8mn_clk_get_rate,
	.enable = imx8mn_clk_enable,
	.disable = imx8mn_clk_disable,
};

static int imx8mn_clk_probe(struct udevice *dev)
{
	void __iomem *base;

	base = (void *)ANATOP_BASE_ADDR;

	clk_dm(IMX8MN_DRAM_PLL_REF_SEL,
	       imx_clk_mux("dram_pll_ref_sel", base + 0x50, 0, 2,
			   pll_ref_sels, ARRAY_SIZE(pll_ref_sels)));
	clk_dm(IMX8MN_ARM_PLL_REF_SEL,
	       imx_clk_mux("arm_pll_ref_sel", base + 0x84, 0, 2,
			   pll_ref_sels, ARRAY_SIZE(pll_ref_sels)));
	clk_dm(IMX8MN_SYS_PLL1_REF_SEL,
	       imx_clk_mux("sys_pll1_ref_sel", base + 0x94, 0, 2,
			   pll_ref_sels, ARRAY_SIZE(pll_ref_sels)));
	clk_dm(IMX8MN_SYS_PLL2_REF_SEL,
	       imx_clk_mux("sys_pll2_ref_sel", base + 0x104, 0, 2,
			   pll_ref_sels, ARRAY_SIZE(pll_ref_sels)));
	clk_dm(IMX8MN_SYS_PLL3_REF_SEL,
	       imx_clk_mux("sys_pll3_ref_sel", base + 0x114, 0, 2,
			   pll_ref_sels, ARRAY_SIZE(pll_ref_sels)));

	clk_dm(IMX8MN_DRAM_PLL,
	       imx_clk_pll14xx("dram_pll", "dram_pll_ref_sel",
			       base + 0x50, &imx8mn_dram_pll));
	clk_dm(IMX8MN_ARM_PLL,
	       imx_clk_pll14xx("arm_pll", "arm_pll_ref_sel",
			       base + 0x84, &imx8mn_arm_pll));
	clk_dm(IMX8MN_SYS_PLL1,
	       imx_clk_pll14xx("sys_pll1", "sys_pll1_ref_sel",
			       base + 0x94, &imx8mn_sys_pll));
	clk_dm(IMX8MN_SYS_PLL2,
	       imx_clk_pll14xx("sys_pll2", "sys_pll2_ref_sel",
			       base + 0x104, &imx8mn_sys_pll));
	clk_dm(IMX8MN_SYS_PLL3,
	       imx_clk_pll14xx("sys_pll3", "sys_pll3_ref_sel",
			       base + 0x114, &imx8mn_sys_pll));

	/* PLL bypass out */
	clk_dm(IMX8MN_DRAM_PLL_BYPASS,
	       imx_clk_mux_flags("dram_pll_bypass", base + 0x50, 4, 1,
				 dram_pll_bypass_sels,
				 ARRAY_SIZE(dram_pll_bypass_sels),
				 CLK_SET_RATE_PARENT));
	clk_dm(IMX8MN_ARM_PLL_BYPASS,
	       imx_clk_mux_flags("arm_pll_bypass", base + 0x84, 4, 1,
				 arm_pll_bypass_sels,
				 ARRAY_SIZE(arm_pll_bypass_sels),
				 CLK_SET_RATE_PARENT));
	clk_dm(IMX8MN_SYS_PLL1_BYPASS,
	       imx_clk_mux_flags("sys_pll1_bypass", base + 0x94, 4, 1,
				 sys_pll1_bypass_sels,
				 ARRAY_SIZE(sys_pll1_bypass_sels),
				 CLK_SET_RATE_PARENT));
	clk_dm(IMX8MN_SYS_PLL2_BYPASS,
	       imx_clk_mux_flags("sys_pll2_bypass", base + 0x104, 4, 1,
				 sys_pll2_bypass_sels,
				 ARRAY_SIZE(sys_pll2_bypass_sels),
				 CLK_SET_RATE_PARENT));
	clk_dm(IMX8MN_SYS_PLL3_BYPASS,
	       imx_clk_mux_flags("sys_pll3_bypass", base + 0x114, 4, 1,
				 sys_pll3_bypass_sels,
				 ARRAY_SIZE(sys_pll3_bypass_sels),
				 CLK_SET_RATE_PARENT));

	/* PLL out gate */
	clk_dm(IMX8MN_DRAM_PLL_OUT,
	       imx_clk_gate("dram_pll_out", "dram_pll_bypass",
			    base + 0x50, 13));
	clk_dm(IMX8MN_ARM_PLL_OUT,
	       imx_clk_gate("arm_pll_out", "arm_pll_bypass",
			    base + 0x84, 11));
	clk_dm(IMX8MN_SYS_PLL1_OUT,
	       imx_clk_gate("sys_pll1_out", "sys_pll1_bypass",
			    base + 0x94, 11));
	clk_dm(IMX8MN_SYS_PLL2_OUT,
	       imx_clk_gate("sys_pll2_out", "sys_pll2_bypass",
			    base + 0x104, 11));
	clk_dm(IMX8MN_SYS_PLL3_OUT,
	       imx_clk_gate("sys_pll3_out", "sys_pll3_bypass",
			    base + 0x114, 11));

	/* SYS PLL fixed output */
	clk_dm(IMX8MN_SYS_PLL1_40M,
	       imx_clk_fixed_factor("sys_pll1_40m", "sys_pll1_out", 1, 20));
	clk_dm(IMX8MN_SYS_PLL1_80M,
	       imx_clk_fixed_factor("sys_pll1_80m", "sys_pll1_out", 1, 10));
	clk_dm(IMX8MN_SYS_PLL1_100M,
	       imx_clk_fixed_factor("sys_pll1_100m", "sys_pll1_out", 1, 8));
	clk_dm(IMX8MN_SYS_PLL1_133M,
	       imx_clk_fixed_factor("sys_pll1_133m", "sys_pll1_out", 1, 6));
	clk_dm(IMX8MN_SYS_PLL1_160M,
	       imx_clk_fixed_factor("sys_pll1_160m", "sys_pll1_out", 1, 5));
	clk_dm(IMX8MN_SYS_PLL1_200M,
	       imx_clk_fixed_factor("sys_pll1_200m", "sys_pll1_out", 1, 4));
	clk_dm(IMX8MN_SYS_PLL1_266M,
	       imx_clk_fixed_factor("sys_pll1_266m", "sys_pll1_out", 1, 3));
	clk_dm(IMX8MN_SYS_PLL1_400M,
	       imx_clk_fixed_factor("sys_pll1_400m", "sys_pll1_out", 1, 2));
	clk_dm(IMX8MN_SYS_PLL1_800M,
	       imx_clk_fixed_factor("sys_pll1_800m", "sys_pll1_out", 1, 1));

	clk_dm(IMX8MN_SYS_PLL2_50M,
	       imx_clk_fixed_factor("sys_pll2_50m", "sys_pll2_out", 1, 20));
	clk_dm(IMX8MN_SYS_PLL2_100M,
	       imx_clk_fixed_factor("sys_pll2_100m", "sys_pll2_out", 1, 10));
	clk_dm(IMX8MN_SYS_PLL2_125M,
	       imx_clk_fixed_factor("sys_pll2_125m", "sys_pll2_out", 1, 8));
	clk_dm(IMX8MN_SYS_PLL2_166M,
	       imx_clk_fixed_factor("sys_pll2_166m", "sys_pll2_out", 1, 6));
	clk_dm(IMX8MN_SYS_PLL2_200M,
	       imx_clk_fixed_factor("sys_pll2_200m", "sys_pll2_out", 1, 5));
	clk_dm(IMX8MN_SYS_PLL2_250M,
	       imx_clk_fixed_factor("sys_pll2_250m", "sys_pll2_out", 1, 4));
	clk_dm(IMX8MN_SYS_PLL2_333M,
	       imx_clk_fixed_factor("sys_pll2_333m", "sys_pll2_out", 1, 3));
	clk_dm(IMX8MN_SYS_PLL2_500M,
	       imx_clk_fixed_factor("sys_pll2_500m", "sys_pll2_out", 1, 2));
	clk_dm(IMX8MN_SYS_PLL2_1000M,
	       imx_clk_fixed_factor("sys_pll2_1000m", "sys_pll2_out", 1, 1));

	base = dev_read_addr_ptr(dev);
	if (base == (void *)FDT_ADDR_T_NONE)
		return -EINVAL;

	clk_dm(IMX8MN_CLK_A53_SRC,
	       imx_clk_mux2("arm_a53_src", base + 0x8000, 24, 3,
			    imx8mn_a53_sels, ARRAY_SIZE(imx8mn_a53_sels)));
	clk_dm(IMX8MN_CLK_A53_CG,
	       imx_clk_gate3("arm_a53_cg", "arm_a53_src", base + 0x8000, 28));
	clk_dm(IMX8MN_CLK_A53_DIV,
	       imx_clk_divider2("arm_a53_div", "arm_a53_cg",
				base + 0x8000, 0, 3));

	clk_dm(IMX8MN_CLK_AHB,
	       imx8m_clk_composite_critical("ahb", imx8mn_ahb_sels,
					    base + 0x9000));
	clk_dm(IMX8MN_CLK_IPG_ROOT,
	       imx_clk_divider2("ipg_root", "ahb", base + 0x9080, 0, 1));

	clk_dm(IMX8MN_CLK_ENET_AXI,
	       imx8m_clk_composite("enet_axi", imx8mn_enet_axi_sels,
				   base + 0x8880));
	clk_dm(IMX8MN_CLK_NAND_USDHC_BUS,
	       imx8m_clk_composite_critical("nand_usdhc_bus",
					    imx8mn_nand_usdhc_sels,
					    base + 0x8900));

	/* IP */
	clk_dm(IMX8MN_CLK_USDHC1,
	       imx8m_clk_composite("usdhc1", imx8mn_usdhc1_sels,
				   base + 0xac00));
	clk_dm(IMX8MN_CLK_USDHC2,
	       imx8m_clk_composite("usdhc2", imx8mn_usdhc2_sels,
				   base + 0xac80));
	clk_dm(IMX8MN_CLK_I2C1,
	       imx8m_clk_composite("i2c1", imx8mn_i2c1_sels, base + 0xad00));
	clk_dm(IMX8MN_CLK_I2C2,
	       imx8m_clk_composite("i2c2", imx8mn_i2c2_sels, base + 0xad80));
	clk_dm(IMX8MN_CLK_I2C3,
	       imx8m_clk_composite("i2c3", imx8mn_i2c3_sels, base + 0xae00));
	clk_dm(IMX8MN_CLK_I2C4,
	       imx8m_clk_composite("i2c4", imx8mn_i2c4_sels, base + 0xae80));
	clk_dm(IMX8MN_CLK_WDOG,
	       imx8m_clk_composite("wdog", imx8mn_wdog_sels, base + 0xb900));
	clk_dm(IMX8MN_CLK_USDHC3,
	       imx8m_clk_composite("usdhc3", imx8mn_usdhc3_sels,
				   base + 0xbc80));

	clk_dm(IMX8MN_CLK_I2C1_ROOT,
	       imx_clk_gate4("i2c1_root_clk", "i2c1", base + 0x4170, 0));
	clk_dm(IMX8MN_CLK_I2C2_ROOT,
	       imx_clk_gate4("i2c2_root_clk", "i2c2", base + 0x4180, 0));
	clk_dm(IMX8MN_CLK_I2C3_ROOT,
	       imx_clk_gate4("i2c3_root_clk", "i2c3", base + 0x4190, 0));
	clk_dm(IMX8MN_CLK_I2C4_ROOT,
	       imx_clk_gate4("i2c4_root_clk", "i2c4", base + 0x41a0, 0));
	clk_dm(IMX8MN_CLK_OCOTP_ROOT,
	       imx_clk_gate4("ocotp_root_clk", "ipg_root", base + 0x4220, 0));
	clk_dm(IMX8MN_CLK_USDHC1_ROOT,
	       imx_clk_gate4("usdhc1_root_clk", "usdhc1", base + 0x4510, 0));
	clk_dm(IMX8MN_CLK_USDHC2_ROOT,
	       imx_clk_gate4("usdhc2_root_clk", "usdhc2", base + 0x4520, 0));
	clk_dm(IMX8MN_CLK_WDOG1_ROOT,
	       imx_clk_gate4("wdog1_root_clk", "wdog", base + 0x4530, 0));
	clk_dm(IMX8MN_CLK_WDOG2_ROOT,
	       imx_clk_gate4("wdog2_root_clk", "wdog", base + 0x4540, 0));
	clk_dm(IMX8MN_CLK_WDOG3_ROOT,
	       imx_clk_gate4("wdog3_root_clk", "wdog", base + 0x4550, 0));
	clk_dm(IMX8MN_CLK_USDHC3_ROOT,
	       imx_clk_gate4("usdhc3_root_clk", "usdhc3", base + 0x45e0, 0));

#ifdef CONFIG_SPL_BUILD
	struct clk *clkp, *clkp1;

	clk_get_by_id(IMX8MN_CLK_WDOG1_ROOT, &clkp);
	clk_enable(clkp);
	clk_get_by_id(IMX8MN_CLK_WDOG2_ROOT, &clkp);
	clk_enable(clkp);
	clk_get_by_id(IMX8MN_CLK_WDOG3_ROOT, &clkp);
	clk_enable(clkp);

	/* Configure SYS_PLL3 to 600MHz */
	clk_get_by_id(IMX8MN_SYS_PLL3, &clkp);
	clk_set_rate(clkp, 600000000UL);
	clk_enable(clkp);

	/* Configure ARM to sys_pll2_500m */
	clk_get_by_id(IMX8MN_CLK_A53_SRC, &clkp);
	clk_get_by_id(IMX8MN_SYS_PLL2_OUT, &clkp1);
	clk_enable(clkp1);
	clk_get_by_id(IMX8MN_SYS_PLL2_500M, &clkp1);
	clk_set_parent(clkp, clkp1);

	/* Configure ARM PLL to 1.2GHz */
	clk_get_by_id(IMX8MN_ARM_PLL, &clkp1);
	clk_set_rate(clkp1, 1200000000UL);
	clk_get_by_id(IMX8MN_ARM_PLL_OUT, &clkp1);
	clk_enable(clkp1);
	clk_set_parent(clkp, clkp1);

	/* Configure DIV to 1.2GHz */
	clk_get_by_id(IMX8MN_CLK_A53_DIV, &clkp1);
	clk_set_rate(clkp1, 1200000000UL);
#endif

	return 0;
}

static const struct udevice_id imx8mn_clk_ids[] = {
	{ .compatible = "fsl,imx8mn-ccm" },
	{ },
};

U_BOOT_DRIVER(imx8mn_clk) = {
	.name = "clk_imx8mn",
	.id = UCLASS_CLK,
	.of_match = imx8mn_clk_ids,
	.ops = &imx8mn_clk_ops,
	.probe = imx8mn_clk_probe,
	.flags = DM_FLAG_PRE_RELOC,
};