drivers/clk/rockchip/clk_rk322x.c - platform/external/u-boot - Gitiles

 // SPDX-License-Identifier: GPL-2.0
 /*
  * (C) Copyright 2017 Rockchip Electronics Co., Ltd
  */

 #include <common.h>
 #include <clk-uclass.h>
 #include <dm.h>
 #include <errno.h>
 #include <log.h>
 #include <malloc.h>
 #include <syscon.h>
 #include <asm/io.h>
 #include <asm/arch-rockchip/clock.h>
 #include <asm/arch-rockchip/cru_rk322x.h>
 #include <asm/arch-rockchip/hardware.h>
 #include <dm/device-internal.h>
 #include <dm/lists.h>
 #include <dt-bindings/clock/rk3228-cru.h>
 #include <linux/bitops.h>
 #include <linux/delay.h>
 #include <linux/log2.h>
 #include <linux/stringify.h>

 enum {
 	VCO_MAX_HZ	= 3200U * 1000000,
 	VCO_MIN_HZ	= 800 * 1000000,
 	OUTPUT_MAX_HZ	= 3200U * 1000000,
 	OUTPUT_MIN_HZ	= 24 * 1000000,
 };

 #define DIV_TO_RATE(input_rate, div)	((input_rate) / ((div) + 1))

 #define PLL_DIVISORS(hz, _refdiv, _postdiv1, _postdiv2) {\
 	.refdiv = _refdiv,\
 	.fbdiv = (u32)((u64)hz * _refdiv * _postdiv1 * _postdiv2 / OSC_HZ), \
 	.postdiv1 = _postdiv1, .postdiv2 = _postdiv2};\
 	_Static_assert(((u64)hz * _refdiv * _postdiv1 * _postdiv2 / OSC_HZ) * \
 			 OSC_HZ / (_refdiv * _postdiv1 * _postdiv2) == hz, \
 			 #hz "Hz cannot be hit with PLL "\
 			 "divisors on line " __stringify(__LINE__));

 /* use integer mode*/
 static const struct pll_div apll_init_cfg = PLL_DIVISORS(APLL_HZ, 1, 3, 1);
 static const struct pll_div gpll_init_cfg = PLL_DIVISORS(GPLL_HZ, 2, 2, 1);

 static int rkclk_set_pll(struct rk322x_cru *cru, enum rk_clk_id clk_id,
 			 const struct pll_div *div)
 {
 	int pll_id = rk_pll_id(clk_id);
 	struct rk322x_pll *pll = &cru->pll[pll_id];

 	/* All PLLs have same VCO and output frequency range restrictions. */
 	uint vco_hz = OSC_HZ / 1000 * div->fbdiv / div->refdiv * 1000;
 	uint output_hz = vco_hz / div->postdiv1 / div->postdiv2;

 	debug("PLL at %p: fb=%d, ref=%d, pst1=%d, pst2=%d, vco=%u Hz, output=%u Hz\n",
 	      pll, div->fbdiv, div->refdiv, div->postdiv1,
 	      div->postdiv2, vco_hz, output_hz);
 	assert(vco_hz >= VCO_MIN_HZ && vco_hz <= VCO_MAX_HZ &&
 	       output_hz >= OUTPUT_MIN_HZ && output_hz <= OUTPUT_MAX_HZ);

 	/* use integer mode */
 	rk_setreg(&pll->con1, 1 << PLL_DSMPD_SHIFT);
 	/* Power down */
 	rk_setreg(&pll->con1, 1 << PLL_PD_SHIFT);

 	rk_clrsetreg(&pll->con0,
 		     PLL_POSTDIV1_MASK | PLL_FBDIV_MASK,
 		     (div->postdiv1 << PLL_POSTDIV1_SHIFT) | div->fbdiv);
 	rk_clrsetreg(&pll->con1, PLL_POSTDIV2_MASK | PLL_REFDIV_MASK,
 		     (div->postdiv2 << PLL_POSTDIV2_SHIFT |
 		     div->refdiv << PLL_REFDIV_SHIFT));

 	/* Power Up */
 	rk_clrreg(&pll->con1, 1 << PLL_PD_SHIFT);

 	/* waiting for pll lock */
 	while (readl(&pll->con1) & (1 << PLL_LOCK_STATUS_SHIFT))
 		udelay(1);

 	return 0;
 }

 static void rkclk_init(struct rk322x_cru *cru)
 {
 	u32 aclk_div;
 	u32 hclk_div;
 	u32 pclk_div;

 	/* pll enter slow-mode */
 	rk_clrsetreg(&cru->cru_mode_con,
 		     GPLL_MODE_MASK | APLL_MODE_MASK,
 		     GPLL_MODE_SLOW << GPLL_MODE_SHIFT |
 		     APLL_MODE_SLOW << APLL_MODE_SHIFT);

 	/* init pll */
 	rkclk_set_pll(cru, CLK_ARM, &apll_init_cfg);
 	rkclk_set_pll(cru, CLK_GENERAL, &gpll_init_cfg);

 	/*
 	 * select apll as cpu/core clock pll source and
 	 * set up dependent divisors for PERI and ACLK clocks.
 	 * core hz : apll = 1:1
 	 */
 	aclk_div = APLL_HZ / CORE_ACLK_HZ - 1;
 	assert((aclk_div + 1) * CORE_ACLK_HZ == APLL_HZ && aclk_div < 0x7);

 	pclk_div = APLL_HZ / CORE_PERI_HZ - 1;
 	assert((pclk_div + 1) * CORE_PERI_HZ == APLL_HZ && pclk_div < 0xf);

 	rk_clrsetreg(&cru->cru_clksel_con[0],
 		     CORE_CLK_PLL_SEL_MASK | CORE_DIV_CON_MASK,
 		     CORE_CLK_PLL_SEL_APLL << CORE_CLK_PLL_SEL_SHIFT |
 		     0 << CORE_DIV_CON_SHIFT);

 	rk_clrsetreg(&cru->cru_clksel_con[1],
 		     CORE_ACLK_DIV_MASK | CORE_PERI_DIV_MASK,
 		     aclk_div << CORE_ACLK_DIV_SHIFT |
 		     pclk_div << CORE_PERI_DIV_SHIFT);

 	/*
 	 * select gpll as pd_bus bus clock source and
 	 * set up dependent divisors for PCLK/HCLK and ACLK clocks.
 	 */
 	aclk_div = GPLL_HZ / BUS_ACLK_HZ - 1;
 	assert((aclk_div + 1) * BUS_ACLK_HZ == GPLL_HZ && aclk_div <= 0x1f);

 	pclk_div = BUS_ACLK_HZ / BUS_PCLK_HZ - 1;
 	assert((pclk_div + 1) * BUS_PCLK_HZ == BUS_ACLK_HZ && pclk_div <= 0x7);

 	hclk_div = BUS_ACLK_HZ / BUS_HCLK_HZ - 1;
 	assert((hclk_div + 1) * BUS_HCLK_HZ == BUS_ACLK_HZ && hclk_div <= 0x3);

 	rk_clrsetreg(&cru->cru_clksel_con[0],
 		     BUS_ACLK_PLL_SEL_MASK | BUS_ACLK_DIV_MASK,
 		     BUS_ACLK_PLL_SEL_GPLL << BUS_ACLK_PLL_SEL_SHIFT |
 		     aclk_div << BUS_ACLK_DIV_SHIFT);

 	rk_clrsetreg(&cru->cru_clksel_con[1],
 		     BUS_PCLK_DIV_MASK | BUS_HCLK_DIV_MASK,
 		     pclk_div << BUS_PCLK_DIV_SHIFT |
 		     hclk_div << BUS_HCLK_DIV_SHIFT);

 	/*
 	 * select gpll as pd_peri bus clock source and
 	 * set up dependent divisors for PCLK/HCLK and ACLK clocks.
 	 */
 	aclk_div = GPLL_HZ / PERI_ACLK_HZ - 1;
 	assert((aclk_div + 1) * PERI_ACLK_HZ == GPLL_HZ && aclk_div < 0x1f);

 	hclk_div = ilog2(PERI_ACLK_HZ / PERI_HCLK_HZ);
 	assert((1 << hclk_div) * PERI_HCLK_HZ ==
 		PERI_ACLK_HZ && (hclk_div < 0x4));

 	pclk_div = ilog2(PERI_ACLK_HZ / PERI_PCLK_HZ);
 	assert((1 << pclk_div) * PERI_PCLK_HZ ==
 		PERI_ACLK_HZ && pclk_div < 0x8);

 	rk_clrsetreg(&cru->cru_clksel_con[10],
 		     PERI_PLL_SEL_MASK | PERI_PCLK_DIV_MASK |
 		     PERI_HCLK_DIV_MASK | PERI_ACLK_DIV_MASK,
 		     PERI_PLL_GPLL << PERI_PLL_SEL_SHIFT |
 		     pclk_div << PERI_PCLK_DIV_SHIFT |
 		     hclk_div << PERI_HCLK_DIV_SHIFT |
 		     aclk_div << PERI_ACLK_DIV_SHIFT);

 	/* PLL enter normal-mode */
 	rk_clrsetreg(&cru->cru_mode_con,
 		     GPLL_MODE_MASK | APLL_MODE_MASK,
 		     GPLL_MODE_NORM << GPLL_MODE_SHIFT |
 		     APLL_MODE_NORM << APLL_MODE_SHIFT);
 }

 /* Get pll rate by id */
 static uint32_t rkclk_pll_get_rate(struct rk322x_cru *cru,
 				   enum rk_clk_id clk_id)
 {
 	uint32_t refdiv, fbdiv, postdiv1, postdiv2;
 	uint32_t con;
 	int pll_id = rk_pll_id(clk_id);
 	struct rk322x_pll *pll = &cru->pll[pll_id];
 	static u8 clk_shift[CLK_COUNT] = {
 		0xff, APLL_MODE_SHIFT, DPLL_MODE_SHIFT, 0xff,
 		GPLL_MODE_SHIFT, 0xff
 	};
 	static u32 clk_mask[CLK_COUNT] = {
 		0xff, APLL_MODE_MASK, DPLL_MODE_MASK, 0xff,
 		GPLL_MODE_MASK, 0xff
 	};
 	uint shift;
 	uint mask;

 	con = readl(&cru->cru_mode_con);
 	shift = clk_shift[clk_id];
 	mask = clk_mask[clk_id];

 	switch ((con & mask) >> shift) {
 	case GPLL_MODE_SLOW:
 		return OSC_HZ;
 	case GPLL_MODE_NORM:

 		/* normal mode */
 		con = readl(&pll->con0);
 		postdiv1 = (con & PLL_POSTDIV1_MASK) >> PLL_POSTDIV1_SHIFT;
 		fbdiv = (con & PLL_FBDIV_MASK) >> PLL_FBDIV_SHIFT;
 		con = readl(&pll->con1);
 		postdiv2 = (con & PLL_POSTDIV2_MASK) >> PLL_POSTDIV2_SHIFT;
 		refdiv = (con & PLL_REFDIV_MASK) >> PLL_REFDIV_SHIFT;
 		return (24 * fbdiv / (refdiv * postdiv1 * postdiv2)) * 1000000;
 	default:
 		return 32768;
 	}
 }

 static ulong rockchip_mmc_get_clk(struct rk322x_cru *cru, uint clk_general_rate,
 				  int periph)
 {
 	uint src_rate;
 	uint div, mux;
 	u32 con;

 	switch (periph) {
 	case HCLK_EMMC:
 	case SCLK_EMMC:
 	case SCLK_EMMC_SAMPLE:
 		con = readl(&cru->cru_clksel_con[11]);
 		mux = (con & EMMC_PLL_MASK) >> EMMC_PLL_SHIFT;
 		con = readl(&cru->cru_clksel_con[12]);
 		div = (con & EMMC_DIV_MASK) >> EMMC_DIV_SHIFT;
 		break;
 	case HCLK_SDMMC:
 	case SCLK_SDMMC:
 		con = readl(&cru->cru_clksel_con[11]);
 		mux = (con & MMC0_PLL_MASK) >> MMC0_PLL_SHIFT;
 		div = (con & MMC0_DIV_MASK) >> MMC0_DIV_SHIFT;
 		break;
 	default:
 		return -EINVAL;
 	}

 	src_rate = mux == EMMC_SEL_24M ? OSC_HZ : clk_general_rate;
 	return DIV_TO_RATE(src_rate, div) / 2;
 }

 static ulong rk322x_mac_set_clk(struct rk322x_cru *cru, uint freq)
 {
 	ulong ret;

 	/*
 	 * The gmac clock can be derived either from an external clock
 	 * or can be generated from internally by a divider from SCLK_MAC.
 	 */
 	if (readl(&cru->cru_clksel_con[5]) & BIT(5)) {
 		/* An external clock will always generate the right rate... */
 		ret = freq;
 	} else {
 		u32 con = readl(&cru->cru_clksel_con[5]);
 		ulong pll_rate;
 		u8 div;

 		if ((con >> MAC_PLL_SEL_SHIFT) & MAC_PLL_SEL_MASK)
 			pll_rate = GPLL_HZ;
 		else
 			/* CPLL is not set */
 			return -EPERM;

 		div = DIV_ROUND_UP(pll_rate, freq) - 1;
 		if (div <= 0x1f)
 			rk_clrsetreg(&cru->cru_clksel_con[5], CLK_MAC_DIV_MASK,
 				     div << CLK_MAC_DIV_SHIFT);
 		else
 			debug("Unsupported div for gmac:%d\n", div);

 		return DIV_TO_RATE(pll_rate, div);
 	}

 	return ret;
 }

 static ulong rockchip_mmc_set_clk(struct rk322x_cru *cru, uint clk_general_rate,
 				  int periph, uint freq)
 {
 	int src_clk_div;
 	int mux;

 	debug("%s: clk_general_rate=%u\n", __func__, clk_general_rate);

 	/* mmc clock defaulg div 2 internal, need provide double in cru */
 	src_clk_div = DIV_ROUND_UP(clk_general_rate / 2, freq);

 	if (src_clk_div > 128) {
 		src_clk_div = DIV_ROUND_UP(OSC_HZ / 2, freq);
 		assert(src_clk_div - 1 < 128);
 		mux = EMMC_SEL_24M;
 	} else {
 		mux = EMMC_SEL_GPLL;
 	}

 	switch (periph) {
 	case HCLK_EMMC:
 	case SCLK_EMMC:
 	case SCLK_EMMC_SAMPLE:
 		rk_clrsetreg(&cru->cru_clksel_con[11],
 			     EMMC_PLL_MASK,
 			     mux << EMMC_PLL_SHIFT);
 		rk_clrsetreg(&cru->cru_clksel_con[12],
 			     EMMC_DIV_MASK,
 			     (src_clk_div - 1) << EMMC_DIV_SHIFT);
 		break;
 	case HCLK_SDMMC:
 	case SCLK_SDMMC:
 		rk_clrsetreg(&cru->cru_clksel_con[11],
 			     MMC0_PLL_MASK | MMC0_DIV_MASK,
 			     mux << MMC0_PLL_SHIFT |
 			     (src_clk_div - 1) << MMC0_DIV_SHIFT);
 		break;
 	default:
 		return -EINVAL;
 	}

 	return rockchip_mmc_get_clk(cru, clk_general_rate, periph);
 }

 static int rk322x_ddr_set_clk(struct rk322x_cru *cru, unsigned int set_rate)
 {
 	struct pll_div dpll_cfg;

 	/*  clk_ddrc == DPLL = 24MHz / refdiv * fbdiv / postdiv1 / postdiv2 */
 	switch (set_rate) {
 	case 400*MHz:
 		dpll_cfg = (struct pll_div)
 		{.refdiv = 1, .fbdiv = 50, .postdiv1 = 3, .postdiv2 = 1};
 		break;
 	case 600*MHz:
 		dpll_cfg = (struct pll_div)
 		{.refdiv = 1, .fbdiv = 75, .postdiv1 = 3, .postdiv2 = 1};
 		break;
 	case 800*MHz:
 		dpll_cfg = (struct pll_div)
 		{.refdiv = 1, .fbdiv = 100, .postdiv1 = 3, .postdiv2 = 1};
 		break;
 	}

 	/* pll enter slow-mode */
 	rk_clrsetreg(&cru->cru_mode_con, DPLL_MODE_MASK,
 		     DPLL_MODE_SLOW << DPLL_MODE_SHIFT);
 	rkclk_set_pll(cru, CLK_DDR, &dpll_cfg);
 	/* PLL enter normal-mode */
 	rk_clrsetreg(&cru->cru_mode_con, DPLL_MODE_MASK,
 		     DPLL_MODE_NORM << DPLL_MODE_SHIFT);

 	return set_rate;
 }
 static ulong rk322x_clk_get_rate(struct clk *clk)
 {
 	struct rk322x_clk_priv *priv = dev_get_priv(clk->dev);
 	ulong rate, gclk_rate;

 	gclk_rate = rkclk_pll_get_rate(priv->cru, CLK_GENERAL);
 	switch (clk->id) {
 	case 0 ... 63:
 		rate = rkclk_pll_get_rate(priv->cru, clk->id);
 		break;
 	case HCLK_EMMC:
 	case SCLK_EMMC:
 	case HCLK_SDMMC:
 	case SCLK_SDMMC:
 		rate = rockchip_mmc_get_clk(priv->cru, gclk_rate, clk->id);
 		break;
 	default:
 		return -ENOENT;
 	}

 	return rate;
 }

 static ulong rk322x_clk_set_rate(struct clk *clk, ulong rate)
 {
 	struct rk322x_clk_priv *priv = dev_get_priv(clk->dev);
 	ulong new_rate, gclk_rate;

 	gclk_rate = rkclk_pll_get_rate(priv->cru, CLK_GENERAL);
 	switch (clk->id) {
 	case HCLK_EMMC:
 	case SCLK_EMMC:
 	case HCLK_SDMMC:
 	case SCLK_SDMMC:
 		new_rate = rockchip_mmc_set_clk(priv->cru, gclk_rate,
 						clk->id, rate);
 		break;
 	case CLK_DDR:
 		new_rate = rk322x_ddr_set_clk(priv->cru, rate);
 		break;
 	case SCLK_MAC:
 		new_rate = rk322x_mac_set_clk(priv->cru, rate);
 		break;
 	case PLL_GPLL:
 		return 0;
 	default:
 		return -ENOENT;
 	}

 	return new_rate;
 }

 static int rk322x_gmac_set_parent(struct clk *clk, struct clk *parent)
 {
 	struct rk322x_clk_priv *priv = dev_get_priv(clk->dev);
 	struct rk322x_cru *cru = priv->cru;

 	/*
 	 * If the requested parent is in the same clock-controller and the id
 	 * is SCLK_MAC_SRC ("sclk_gmac_src"), switch to the internal clock.
 	 */
 	if ((parent->dev == clk->dev) && (parent->id == SCLK_MAC_SRC)) {
 		debug("%s: switching RGMII to SCLK_MAC_SRC\n", __func__);
 		rk_clrsetreg(&cru->cru_clksel_con[5], BIT(5), 0);
 		return 0;
 	}

 	/*
 	 * If the requested parent is in the same clock-controller and the id
 	 * is SCLK_MAC_EXTCLK (sclk_mac_extclk), switch to the external clock.
 	 */
 	if ((parent->dev == clk->dev) && (parent->id == SCLK_MAC_EXTCLK)) {
 		debug("%s: switching RGMII to SCLK_MAC_EXTCLK\n", __func__);
 		rk_clrsetreg(&cru->cru_clksel_con[5], BIT(5), BIT(5));
 		return 0;
 	}

 	return -EINVAL;
 }

 static int rk322x_gmac_extclk_set_parent(struct clk *clk, struct clk *parent)
 {
 	struct rk322x_clk_priv *priv = dev_get_priv(clk->dev);
 	const char *clock_output_name;
 	struct rk322x_cru *cru = priv->cru;
 	int ret;

 	ret = dev_read_string_index(parent->dev, "clock-output-names",
 				    parent->id, &clock_output_name);
 	if (ret < 0)
 		return -ENODATA;

 	if (!strcmp(clock_output_name, "ext_gmac")) {
 		debug("%s: switching gmac extclk to ext_gmac\n", __func__);
 		rk_clrsetreg(&cru->cru_clksel_con[29], BIT(10), 0);
 		return 0;
 	} else if (!strcmp(clock_output_name, "phy_50m_out")) {
 		debug("%s: switching gmac extclk to phy_50m_out\n", __func__);
 		rk_clrsetreg(&cru->cru_clksel_con[29], BIT(10), BIT(10));
 		return 0;
 	}

 	return -EINVAL;
 }

 static int rk322x_clk_set_parent(struct clk *clk, struct clk *parent)
 {
 	switch (clk->id) {
 	case SCLK_MAC:
 		return rk322x_gmac_set_parent(clk, parent);
 	case SCLK_MAC_EXTCLK:
 		return rk322x_gmac_extclk_set_parent(clk, parent);
 	}

 	debug("%s: unsupported clk %ld\n", __func__, clk->id);
 	return -ENOENT;
 }

 static struct clk_ops rk322x_clk_ops = {
 	.get_rate	= rk322x_clk_get_rate,
 	.set_rate	= rk322x_clk_set_rate,
 	.set_parent	= rk322x_clk_set_parent,
 };

 static int rk322x_clk_of_to_plat(struct udevice *dev)
 {
 	struct rk322x_clk_priv *priv = dev_get_priv(dev);

 	priv->cru = dev_read_addr_ptr(dev);

 	return 0;
 }

 static int rk322x_clk_probe(struct udevice *dev)
 {
 	struct rk322x_clk_priv *priv = dev_get_priv(dev);

 	rkclk_init(priv->cru);

 	return 0;
 }

 static int rk322x_clk_bind(struct udevice *dev)
 {
 	int ret;
 	struct udevice *sys_child;
 	struct sysreset_reg *priv;

 	/* The reset driver does not have a device node, so bind it here */
 	ret = device_bind_driver(dev, "rockchip_sysreset", "sysreset",
 				 &sys_child);
 	if (ret) {
 		debug("Warning: No sysreset driver: ret=%d\n", ret);
 	} else {
 		priv = malloc(sizeof(struct sysreset_reg));
 		priv->glb_srst_fst_value = offsetof(struct rk322x_cru,
 						    cru_glb_srst_fst_value);
 		priv->glb_srst_snd_value = offsetof(struct rk322x_cru,
 						    cru_glb_srst_snd_value);
 		dev_set_priv(sys_child, priv);
 	}

 #if CONFIG_IS_ENABLED(RESET_ROCKCHIP)
 	ret = offsetof(struct rk322x_cru, cru_softrst_con[0]);
 	ret = rockchip_reset_bind(dev, ret, 9);
 	if (ret)
 		debug("Warning: software reset driver bind failed\n");
 #endif

 	return 0;
 }

 static const struct udevice_id rk322x_clk_ids[] = {
 	{ .compatible = "rockchip,rk3228-cru" },
 	{ }
 };

 U_BOOT_DRIVER(rockchip_rk322x_cru) = {
 	.name		= "clk_rk322x",
 	.id		= UCLASS_CLK,
 	.of_match	= rk322x_clk_ids,
 	.priv_auto	= sizeof(struct rk322x_clk_priv),
 	.of_to_plat = rk322x_clk_of_to_plat,
 	.ops		= &rk322x_clk_ops,
 	.bind		= rk322x_clk_bind,
 	.probe		= rk322x_clk_probe,
 };
	// SPDX-License-Identifier: GPL-2.0
	/*
	* (C) Copyright 2017 Rockchip Electronics Co., Ltd
	*/

	#include <common.h>
	#include <clk-uclass.h>
	#include <dm.h>
	#include <errno.h>
	#include <log.h>
	#include <malloc.h>
	#include <syscon.h>
	#include <asm/io.h>
	#include <asm/arch-rockchip/clock.h>
	#include <asm/arch-rockchip/cru_rk322x.h>
	#include <asm/arch-rockchip/hardware.h>
	#include <dm/device-internal.h>
	#include <dm/lists.h>
	#include <dt-bindings/clock/rk3228-cru.h>
	#include <linux/bitops.h>
	#include <linux/delay.h>
	#include <linux/log2.h>
	#include <linux/stringify.h>

	enum {
	VCO_MAX_HZ = 3200U * 1000000,
	VCO_MIN_HZ = 800 * 1000000,
	OUTPUT_MAX_HZ = 3200U * 1000000,
	OUTPUT_MIN_HZ = 24 * 1000000,
	};

	#define DIV_TO_RATE(input_rate, div) ((input_rate) / ((div) + 1))

	#define PLL_DIVISORS(hz, _refdiv, _postdiv1, _postdiv2) {\
	.refdiv = _refdiv,\
	.fbdiv = (u32)((u64)hz * _refdiv * _postdiv1 * _postdiv2 / OSC_HZ), \
	.postdiv1 = _postdiv1, .postdiv2 = _postdiv2};\
	_Static_assert(((u64)hz * _refdiv * _postdiv1 * _postdiv2 / OSC_HZ) * \
	OSC_HZ / (_refdiv * _postdiv1 * _postdiv2) == hz, \
	#hz "Hz cannot be hit with PLL "\
	"divisors on line " __stringify(__LINE__));

	/* use integer mode*/
	static const struct pll_div apll_init_cfg = PLL_DIVISORS(APLL_HZ, 1, 3, 1);
	static const struct pll_div gpll_init_cfg = PLL_DIVISORS(GPLL_HZ, 2, 2, 1);

	static int rkclk_set_pll(struct rk322x_cru *cru, enum rk_clk_id clk_id,
	const struct pll_div *div)
	{
	int pll_id = rk_pll_id(clk_id);
	struct rk322x_pll *pll = &cru->pll[pll_id];

	/* All PLLs have same VCO and output frequency range restrictions. */
	uint vco_hz = OSC_HZ / 1000 * div->fbdiv / div->refdiv * 1000;
	uint output_hz = vco_hz / div->postdiv1 / div->postdiv2;

	debug("PLL at %p: fb=%d, ref=%d, pst1=%d, pst2=%d, vco=%u Hz, output=%u Hz\n",
	pll, div->fbdiv, div->refdiv, div->postdiv1,
	div->postdiv2, vco_hz, output_hz);
	assert(vco_hz >= VCO_MIN_HZ && vco_hz <= VCO_MAX_HZ &&
	output_hz >= OUTPUT_MIN_HZ && output_hz <= OUTPUT_MAX_HZ);

	/* use integer mode */
	rk_setreg(&pll->con1, 1 << PLL_DSMPD_SHIFT);
	/* Power down */
	rk_setreg(&pll->con1, 1 << PLL_PD_SHIFT);

	rk_clrsetreg(&pll->con0,
	PLL_POSTDIV1_MASK \| PLL_FBDIV_MASK,
	(div->postdiv1 << PLL_POSTDIV1_SHIFT) \| div->fbdiv);
	rk_clrsetreg(&pll->con1, PLL_POSTDIV2_MASK \| PLL_REFDIV_MASK,
	(div->postdiv2 << PLL_POSTDIV2_SHIFT \|
	div->refdiv << PLL_REFDIV_SHIFT));

	/* Power Up */
	rk_clrreg(&pll->con1, 1 << PLL_PD_SHIFT);

	/* waiting for pll lock */
	while (readl(&pll->con1) & (1 << PLL_LOCK_STATUS_SHIFT))
	udelay(1);

	return 0;
	}

	static void rkclk_init(struct rk322x_cru *cru)
	{
	u32 aclk_div;
	u32 hclk_div;
	u32 pclk_div;

	/* pll enter slow-mode */
	rk_clrsetreg(&cru->cru_mode_con,
	GPLL_MODE_MASK \| APLL_MODE_MASK,
	GPLL_MODE_SLOW << GPLL_MODE_SHIFT \|
	APLL_MODE_SLOW << APLL_MODE_SHIFT);

	/* init pll */
	rkclk_set_pll(cru, CLK_ARM, &apll_init_cfg);
	rkclk_set_pll(cru, CLK_GENERAL, &gpll_init_cfg);

	/*
	* select apll as cpu/core clock pll source and
	* set up dependent divisors for PERI and ACLK clocks.
	* core hz : apll = 1:1
	*/
	aclk_div = APLL_HZ / CORE_ACLK_HZ - 1;
	assert((aclk_div + 1) * CORE_ACLK_HZ == APLL_HZ && aclk_div < 0x7);

	pclk_div = APLL_HZ / CORE_PERI_HZ - 1;
	assert((pclk_div + 1) * CORE_PERI_HZ == APLL_HZ && pclk_div < 0xf);

	rk_clrsetreg(&cru->cru_clksel_con[0],
	CORE_CLK_PLL_SEL_MASK \| CORE_DIV_CON_MASK,
	CORE_CLK_PLL_SEL_APLL << CORE_CLK_PLL_SEL_SHIFT \|
	0 << CORE_DIV_CON_SHIFT);

	rk_clrsetreg(&cru->cru_clksel_con[1],
	CORE_ACLK_DIV_MASK \| CORE_PERI_DIV_MASK,
	aclk_div << CORE_ACLK_DIV_SHIFT \|
	pclk_div << CORE_PERI_DIV_SHIFT);

	/*
	* select gpll as pd_bus bus clock source and
	* set up dependent divisors for PCLK/HCLK and ACLK clocks.
	*/
	aclk_div = GPLL_HZ / BUS_ACLK_HZ - 1;
	assert((aclk_div + 1) * BUS_ACLK_HZ == GPLL_HZ && aclk_div <= 0x1f);

	pclk_div = BUS_ACLK_HZ / BUS_PCLK_HZ - 1;
	assert((pclk_div + 1) * BUS_PCLK_HZ == BUS_ACLK_HZ && pclk_div <= 0x7);

	hclk_div = BUS_ACLK_HZ / BUS_HCLK_HZ - 1;
	assert((hclk_div + 1) * BUS_HCLK_HZ == BUS_ACLK_HZ && hclk_div <= 0x3);

	rk_clrsetreg(&cru->cru_clksel_con[0],
	BUS_ACLK_PLL_SEL_MASK \| BUS_ACLK_DIV_MASK,
	BUS_ACLK_PLL_SEL_GPLL << BUS_ACLK_PLL_SEL_SHIFT \|
	aclk_div << BUS_ACLK_DIV_SHIFT);

	rk_clrsetreg(&cru->cru_clksel_con[1],
	BUS_PCLK_DIV_MASK \| BUS_HCLK_DIV_MASK,
	pclk_div << BUS_PCLK_DIV_SHIFT \|
	hclk_div << BUS_HCLK_DIV_SHIFT);

	/*
	* select gpll as pd_peri bus clock source and
	* set up dependent divisors for PCLK/HCLK and ACLK clocks.
	*/
	aclk_div = GPLL_HZ / PERI_ACLK_HZ - 1;
	assert((aclk_div + 1) * PERI_ACLK_HZ == GPLL_HZ && aclk_div < 0x1f);

	hclk_div = ilog2(PERI_ACLK_HZ / PERI_HCLK_HZ);
	assert((1 << hclk_div) * PERI_HCLK_HZ ==
	PERI_ACLK_HZ && (hclk_div < 0x4));

	pclk_div = ilog2(PERI_ACLK_HZ / PERI_PCLK_HZ);
	assert((1 << pclk_div) * PERI_PCLK_HZ ==
	PERI_ACLK_HZ && pclk_div < 0x8);

	rk_clrsetreg(&cru->cru_clksel_con[10],
	PERI_PLL_SEL_MASK \| PERI_PCLK_DIV_MASK \|
	PERI_HCLK_DIV_MASK \| PERI_ACLK_DIV_MASK,
	PERI_PLL_GPLL << PERI_PLL_SEL_SHIFT \|
	pclk_div << PERI_PCLK_DIV_SHIFT \|
	hclk_div << PERI_HCLK_DIV_SHIFT \|
	aclk_div << PERI_ACLK_DIV_SHIFT);

	/* PLL enter normal-mode */
	rk_clrsetreg(&cru->cru_mode_con,
	GPLL_MODE_MASK \| APLL_MODE_MASK,
	GPLL_MODE_NORM << GPLL_MODE_SHIFT \|
	APLL_MODE_NORM << APLL_MODE_SHIFT);
	}

	/* Get pll rate by id */
	static uint32_t rkclk_pll_get_rate(struct rk322x_cru *cru,
	enum rk_clk_id clk_id)
	{
	uint32_t refdiv, fbdiv, postdiv1, postdiv2;
	uint32_t con;
	int pll_id = rk_pll_id(clk_id);
	struct rk322x_pll *pll = &cru->pll[pll_id];
	static u8 clk_shift[CLK_COUNT] = {
	0xff, APLL_MODE_SHIFT, DPLL_MODE_SHIFT, 0xff,
	GPLL_MODE_SHIFT, 0xff
	};
	static u32 clk_mask[CLK_COUNT] = {
	0xff, APLL_MODE_MASK, DPLL_MODE_MASK, 0xff,
	GPLL_MODE_MASK, 0xff
	};
	uint shift;
	uint mask;

	con = readl(&cru->cru_mode_con);
	shift = clk_shift[clk_id];
	mask = clk_mask[clk_id];

	switch ((con & mask) >> shift) {
	case GPLL_MODE_SLOW:
	return OSC_HZ;
	case GPLL_MODE_NORM:

	/* normal mode */
	con = readl(&pll->con0);
	postdiv1 = (con & PLL_POSTDIV1_MASK) >> PLL_POSTDIV1_SHIFT;
	fbdiv = (con & PLL_FBDIV_MASK) >> PLL_FBDIV_SHIFT;
	con = readl(&pll->con1);
	postdiv2 = (con & PLL_POSTDIV2_MASK) >> PLL_POSTDIV2_SHIFT;
	refdiv = (con & PLL_REFDIV_MASK) >> PLL_REFDIV_SHIFT;
	return (24 * fbdiv / (refdiv * postdiv1 * postdiv2)) * 1000000;
	default:
	return 32768;
	}
	}

	static ulong rockchip_mmc_get_clk(struct rk322x_cru *cru, uint clk_general_rate,
	int periph)
	{
	uint src_rate;
	uint div, mux;
	u32 con;

	switch (periph) {
	case HCLK_EMMC:
	case SCLK_EMMC:
	case SCLK_EMMC_SAMPLE:
	con = readl(&cru->cru_clksel_con[11]);
	mux = (con & EMMC_PLL_MASK) >> EMMC_PLL_SHIFT;
	con = readl(&cru->cru_clksel_con[12]);
	div = (con & EMMC_DIV_MASK) >> EMMC_DIV_SHIFT;
	break;
	case HCLK_SDMMC:
	case SCLK_SDMMC:
	con = readl(&cru->cru_clksel_con[11]);
	mux = (con & MMC0_PLL_MASK) >> MMC0_PLL_SHIFT;
	div = (con & MMC0_DIV_MASK) >> MMC0_DIV_SHIFT;
	break;
	default:
	return -EINVAL;
	}

	src_rate = mux == EMMC_SEL_24M ? OSC_HZ : clk_general_rate;
	return DIV_TO_RATE(src_rate, div) / 2;
	}

	static ulong rk322x_mac_set_clk(struct rk322x_cru *cru, uint freq)
	{
	ulong ret;

	/*
	* The gmac clock can be derived either from an external clock
	* or can be generated from internally by a divider from SCLK_MAC.
	*/
	if (readl(&cru->cru_clksel_con[5]) & BIT(5)) {
	/* An external clock will always generate the right rate... */
	ret = freq;
	} else {
	u32 con = readl(&cru->cru_clksel_con[5]);
	ulong pll_rate;
	u8 div;

	if ((con >> MAC_PLL_SEL_SHIFT) & MAC_PLL_SEL_MASK)
	pll_rate = GPLL_HZ;
	else
	/* CPLL is not set */
	return -EPERM;

	div = DIV_ROUND_UP(pll_rate, freq) - 1;
	if (div <= 0x1f)
	rk_clrsetreg(&cru->cru_clksel_con[5], CLK_MAC_DIV_MASK,
	div << CLK_MAC_DIV_SHIFT);
	else
	debug("Unsupported div for gmac:%d\n", div);

	return DIV_TO_RATE(pll_rate, div);
	}

	return ret;
	}

	static ulong rockchip_mmc_set_clk(struct rk322x_cru *cru, uint clk_general_rate,
	int periph, uint freq)
	{
	int src_clk_div;
	int mux;

	debug("%s: clk_general_rate=%u\n", __func__, clk_general_rate);

	/* mmc clock defaulg div 2 internal, need provide double in cru */
	src_clk_div = DIV_ROUND_UP(clk_general_rate / 2, freq);

	if (src_clk_div > 128) {
	src_clk_div = DIV_ROUND_UP(OSC_HZ / 2, freq);
	assert(src_clk_div - 1 < 128);
	mux = EMMC_SEL_24M;
	} else {
	mux = EMMC_SEL_GPLL;
	}

	switch (periph) {
	case HCLK_EMMC:
	case SCLK_EMMC:
	case SCLK_EMMC_SAMPLE:
	rk_clrsetreg(&cru->cru_clksel_con[11],
	EMMC_PLL_MASK,
	mux << EMMC_PLL_SHIFT);
	rk_clrsetreg(&cru->cru_clksel_con[12],
	EMMC_DIV_MASK,
	(src_clk_div - 1) << EMMC_DIV_SHIFT);
	break;
	case HCLK_SDMMC:
	case SCLK_SDMMC:
	rk_clrsetreg(&cru->cru_clksel_con[11],
	MMC0_PLL_MASK \| MMC0_DIV_MASK,
	mux << MMC0_PLL_SHIFT \|
	(src_clk_div - 1) << MMC0_DIV_SHIFT);
	break;
	default:
	return -EINVAL;
	}

	return rockchip_mmc_get_clk(cru, clk_general_rate, periph);
	}

	static int rk322x_ddr_set_clk(struct rk322x_cru *cru, unsigned int set_rate)
	{
	struct pll_div dpll_cfg;

	/* clk_ddrc == DPLL = 24MHz / refdiv * fbdiv / postdiv1 / postdiv2 */
	switch (set_rate) {
	case 400*MHz:
	dpll_cfg = (struct pll_div)
	{.refdiv = 1, .fbdiv = 50, .postdiv1 = 3, .postdiv2 = 1};
	break;
	case 600*MHz:
	dpll_cfg = (struct pll_div)
	{.refdiv = 1, .fbdiv = 75, .postdiv1 = 3, .postdiv2 = 1};
	break;
	case 800*MHz:
	dpll_cfg = (struct pll_div)
	{.refdiv = 1, .fbdiv = 100, .postdiv1 = 3, .postdiv2 = 1};
	break;
	}

	/* pll enter slow-mode */
	rk_clrsetreg(&cru->cru_mode_con, DPLL_MODE_MASK,
	DPLL_MODE_SLOW << DPLL_MODE_SHIFT);
	rkclk_set_pll(cru, CLK_DDR, &dpll_cfg);
	/* PLL enter normal-mode */
	rk_clrsetreg(&cru->cru_mode_con, DPLL_MODE_MASK,
	DPLL_MODE_NORM << DPLL_MODE_SHIFT);

	return set_rate;
	}
	static ulong rk322x_clk_get_rate(struct clk *clk)
	{
	struct rk322x_clk_priv *priv = dev_get_priv(clk->dev);
	ulong rate, gclk_rate;

	gclk_rate = rkclk_pll_get_rate(priv->cru, CLK_GENERAL);
	switch (clk->id) {
	case 0 ... 63:
	rate = rkclk_pll_get_rate(priv->cru, clk->id);
	break;
	case HCLK_EMMC:
	case SCLK_EMMC:
	case HCLK_SDMMC:
	case SCLK_SDMMC:
	rate = rockchip_mmc_get_clk(priv->cru, gclk_rate, clk->id);
	break;
	default:
	return -ENOENT;
	}

	return rate;
	}

	static ulong rk322x_clk_set_rate(struct clk *clk, ulong rate)
	{
	struct rk322x_clk_priv *priv = dev_get_priv(clk->dev);
	ulong new_rate, gclk_rate;

	gclk_rate = rkclk_pll_get_rate(priv->cru, CLK_GENERAL);
	switch (clk->id) {
	case HCLK_EMMC:
	case SCLK_EMMC:
	case HCLK_SDMMC:
	case SCLK_SDMMC:
	new_rate = rockchip_mmc_set_clk(priv->cru, gclk_rate,
	clk->id, rate);
	break;
	case CLK_DDR:
	new_rate = rk322x_ddr_set_clk(priv->cru, rate);
	break;
	case SCLK_MAC:
	new_rate = rk322x_mac_set_clk(priv->cru, rate);
	break;
	case PLL_GPLL:
	return 0;
	default:
	return -ENOENT;
	}

	return new_rate;
	}

	static int rk322x_gmac_set_parent(struct clk clk, struct clk parent)
	{
	struct rk322x_clk_priv *priv = dev_get_priv(clk->dev);
	struct rk322x_cru *cru = priv->cru;

	/*
	* If the requested parent is in the same clock-controller and the id
	* is SCLK_MAC_SRC ("sclk_gmac_src"), switch to the internal clock.
	*/
	if ((parent->dev == clk->dev) && (parent->id == SCLK_MAC_SRC)) {
	debug("%s: switching RGMII to SCLK_MAC_SRC\n", __func__);
	rk_clrsetreg(&cru->cru_clksel_con[5], BIT(5), 0);
	return 0;
	}

	/*
	* If the requested parent is in the same clock-controller and the id
	* is SCLK_MAC_EXTCLK (sclk_mac_extclk), switch to the external clock.
	*/
	if ((parent->dev == clk->dev) && (parent->id == SCLK_MAC_EXTCLK)) {
	debug("%s: switching RGMII to SCLK_MAC_EXTCLK\n", __func__);
	rk_clrsetreg(&cru->cru_clksel_con[5], BIT(5), BIT(5));
	return 0;
	}

	return -EINVAL;
	}

	static int rk322x_gmac_extclk_set_parent(struct clk clk, struct clk parent)
	{
	struct rk322x_clk_priv *priv = dev_get_priv(clk->dev);
	const char *clock_output_name;
	struct rk322x_cru *cru = priv->cru;
	int ret;

	ret = dev_read_string_index(parent->dev, "clock-output-names",
	parent->id, &clock_output_name);
	if (ret < 0)
	return -ENODATA;

	if (!strcmp(clock_output_name, "ext_gmac")) {
	debug("%s: switching gmac extclk to ext_gmac\n", __func__);
	rk_clrsetreg(&cru->cru_clksel_con[29], BIT(10), 0);
	return 0;
	} else if (!strcmp(clock_output_name, "phy_50m_out")) {
	debug("%s: switching gmac extclk to phy_50m_out\n", __func__);
	rk_clrsetreg(&cru->cru_clksel_con[29], BIT(10), BIT(10));
	return 0;
	}

	return -EINVAL;
	}

	static int rk322x_clk_set_parent(struct clk clk, struct clk parent)
	{
	switch (clk->id) {
	case SCLK_MAC:
	return rk322x_gmac_set_parent(clk, parent);
	case SCLK_MAC_EXTCLK:
	return rk322x_gmac_extclk_set_parent(clk, parent);
	}

	debug("%s: unsupported clk %ld\n", __func__, clk->id);
	return -ENOENT;
	}

	static struct clk_ops rk322x_clk_ops = {
	.get_rate = rk322x_clk_get_rate,
	.set_rate = rk322x_clk_set_rate,
	.set_parent = rk322x_clk_set_parent,
	};

	static int rk322x_clk_of_to_plat(struct udevice *dev)
	{
	struct rk322x_clk_priv *priv = dev_get_priv(dev);

	priv->cru = dev_read_addr_ptr(dev);

	return 0;
	}

	static int rk322x_clk_probe(struct udevice *dev)
	{
	struct rk322x_clk_priv *priv = dev_get_priv(dev);

	rkclk_init(priv->cru);

	return 0;
	}

	static int rk322x_clk_bind(struct udevice *dev)
	{
	int ret;
	struct udevice *sys_child;
	struct sysreset_reg *priv;

	/* The reset driver does not have a device node, so bind it here */
	ret = device_bind_driver(dev, "rockchip_sysreset", "sysreset",
	&sys_child);
	if (ret) {
	debug("Warning: No sysreset driver: ret=%d\n", ret);
	} else {
	priv = malloc(sizeof(struct sysreset_reg));
	priv->glb_srst_fst_value = offsetof(struct rk322x_cru,
	cru_glb_srst_fst_value);
	priv->glb_srst_snd_value = offsetof(struct rk322x_cru,
	cru_glb_srst_snd_value);
	dev_set_priv(sys_child, priv);
	}

	#if CONFIG_IS_ENABLED(RESET_ROCKCHIP)
	ret = offsetof(struct rk322x_cru, cru_softrst_con[0]);
	ret = rockchip_reset_bind(dev, ret, 9);
	if (ret)
	debug("Warning: software reset driver bind failed\n");
	#endif

	return 0;
	}

	static const struct udevice_id rk322x_clk_ids[] = {
	{ .compatible = "rockchip,rk3228-cru" },
	{ }
	};

	U_BOOT_DRIVER(rockchip_rk322x_cru) = {
	.name = "clk_rk322x",
	.id = UCLASS_CLK,
	.of_match = rk322x_clk_ids,
	.priv_auto = sizeof(struct rk322x_clk_priv),
	.of_to_plat = rk322x_clk_of_to_plat,
	.ops = &rk322x_clk_ops,
	.bind = rk322x_clk_bind,
	.probe = rk322x_clk_probe,
	};