drivers/clk/imx/clk-pll14xx.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright 2017-2018 NXP.
  */

 #include <linux/bitops.h>
 #include <linux/clk-provider.h>
 #include <linux/err.h>
 #include <linux/io.h>
 #include <linux/iopoll.h>
 #include <linux/slab.h>
 #include <linux/jiffies.h>

 #include "clk.h"

 #define GNRL_CTL	0x0
 #define DIV_CTL		0x4
 #define LOCK_STATUS	BIT(31)
 #define LOCK_SEL_MASK	BIT(29)
 #define CLKE_MASK	BIT(11)
 #define RST_MASK	BIT(9)
 #define BYPASS_MASK	BIT(4)
 #define MDIV_SHIFT	12
 #define MDIV_MASK	GENMASK(21, 12)
 #define PDIV_SHIFT	4
 #define PDIV_MASK	GENMASK(9, 4)
 #define SDIV_SHIFT	0
 #define SDIV_MASK	GENMASK(2, 0)
 #define KDIV_SHIFT	0
 #define KDIV_MASK	GENMASK(15, 0)

 #define LOCK_TIMEOUT_US		10000

 struct clk_pll14xx {
 	struct clk_hw			hw;
 	void __iomem			*base;
 	enum imx_pll14xx_type		type;
 	const struct imx_pll14xx_rate_table *rate_table;
 	int rate_count;
 };

 #define to_clk_pll14xx(_hw) container_of(_hw, struct clk_pll14xx, hw)

 static const struct imx_pll14xx_rate_table imx_pll1416x_tbl[] = {
 	PLL_1416X_RATE(1800000000U, 225, 3, 0),
 	PLL_1416X_RATE(1600000000U, 200, 3, 0),
 	PLL_1416X_RATE(1500000000U, 375, 3, 1),
 	PLL_1416X_RATE(1400000000U, 350, 3, 1),
 	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 imx_pll1443x_tbl[] = {
 	PLL_1443X_RATE(650000000U, 325, 3, 2, 0),
 	PLL_1443X_RATE(594000000U, 198, 2, 2, 0),
 	PLL_1443X_RATE(393216000U, 262, 2, 3, 9437),
 	PLL_1443X_RATE(361267200U, 361, 3, 3, 17511),
 };

 struct imx_pll14xx_clk imx_1443x_pll = {
 	.type = PLL_1443X,
 	.rate_table = imx_pll1443x_tbl,
 	.rate_count = ARRAY_SIZE(imx_pll1443x_tbl),
 };

 struct imx_pll14xx_clk imx_1443x_dram_pll = {
 	.type = PLL_1443X,
 	.rate_table = imx_pll1443x_tbl,
 	.rate_count = ARRAY_SIZE(imx_pll1443x_tbl),
 	.flags = CLK_GET_RATE_NOCACHE,
 };

 struct imx_pll14xx_clk imx_1416x_pll = {
 	.type = PLL_1416X,
 	.rate_table = imx_pll1416x_tbl,
 	.rate_count = ARRAY_SIZE(imx_pll1416x_tbl),
 };

 static const struct imx_pll14xx_rate_table *imx_get_pll_settings(
 		struct clk_pll14xx *pll, unsigned long rate)
 {
 	const struct imx_pll14xx_rate_table *rate_table = pll->rate_table;
 	int i;

 	for (i = 0; i < pll->rate_count; i++)
 		if (rate == rate_table[i].rate)
 			return &rate_table[i];

 	return NULL;
 }

 static long clk_pll14xx_round_rate(struct clk_hw *hw, unsigned long rate,
 			unsigned long *prate)
 {
 	struct clk_pll14xx *pll = to_clk_pll14xx(hw);
 	const struct imx_pll14xx_rate_table *rate_table = pll->rate_table;
 	int i;

 	/* Assumming rate_table is in descending order */
 	for (i = 0; i < pll->rate_count; i++)
 		if (rate >= rate_table[i].rate)
 			return rate_table[i].rate;

 	/* return minimum supported value */
 	return rate_table[i - 1].rate;
 }

 static unsigned long clk_pll1416x_recalc_rate(struct clk_hw *hw,
 						  unsigned long parent_rate)
 {
 	struct clk_pll14xx *pll = to_clk_pll14xx(hw);
 	u32 mdiv, pdiv, sdiv, pll_div;
 	u64 fvco = parent_rate;

 	pll_div = readl_relaxed(pll->base + 4);
 	mdiv = (pll_div & MDIV_MASK) >> MDIV_SHIFT;
 	pdiv = (pll_div & PDIV_MASK) >> PDIV_SHIFT;
 	sdiv = (pll_div & SDIV_MASK) >> SDIV_SHIFT;

 	fvco *= mdiv;
 	do_div(fvco, pdiv << sdiv);

 	return fvco;
 }

 static unsigned long clk_pll1443x_recalc_rate(struct clk_hw *hw,
 						  unsigned long parent_rate)
 {
 	struct clk_pll14xx *pll = to_clk_pll14xx(hw);
 	u32 mdiv, pdiv, sdiv, pll_div_ctl0, pll_div_ctl1;
 	short int kdiv;
 	u64 fvco = parent_rate;

 	pll_div_ctl0 = readl_relaxed(pll->base + 4);
 	pll_div_ctl1 = readl_relaxed(pll->base + 8);
 	mdiv = (pll_div_ctl0 & MDIV_MASK) >> MDIV_SHIFT;
 	pdiv = (pll_div_ctl0 & PDIV_MASK) >> PDIV_SHIFT;
 	sdiv = (pll_div_ctl0 & SDIV_MASK) >> SDIV_SHIFT;
 	kdiv = pll_div_ctl1 & KDIV_MASK;

 	/* fvco = (m * 65536 + k) * Fin / (p * 65536) */
 	fvco *= (mdiv * 65536 + kdiv);
 	pdiv *= 65536;

 	do_div(fvco, pdiv << sdiv);

 	return fvco;
 }

 static inline bool clk_pll14xx_mp_change(const struct imx_pll14xx_rate_table *rate,
 					  u32 pll_div)
 {
 	u32 old_mdiv, old_pdiv;

 	old_mdiv = (pll_div & MDIV_MASK) >> MDIV_SHIFT;
 	old_pdiv = (pll_div & PDIV_MASK) >> PDIV_SHIFT;

 	return rate->mdiv != old_mdiv || rate->pdiv != old_pdiv;
 }

 static int clk_pll14xx_wait_lock(struct clk_pll14xx *pll)
 {
 	u32 val;

 	return readl_poll_timeout(pll->base, val, val & LOCK_STATUS, 0,
 			LOCK_TIMEOUT_US);
 }

 static int clk_pll1416x_set_rate(struct clk_hw *hw, unsigned long drate,
 				 unsigned long prate)
 {
 	struct clk_pll14xx *pll = to_clk_pll14xx(hw);
 	const struct imx_pll14xx_rate_table *rate;
 	u32 tmp, div_val;
 	int ret;

 	rate = imx_get_pll_settings(pll, drate);
 	if (!rate) {
 		pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
 		       drate, clk_hw_get_name(hw));
 		return -EINVAL;
 	}

 	tmp = readl_relaxed(pll->base + 4);

 	if (!clk_pll14xx_mp_change(rate, tmp)) {
 		tmp &= ~(SDIV_MASK) << SDIV_SHIFT;
 		tmp |= rate->sdiv << SDIV_SHIFT;
 		writel_relaxed(tmp, pll->base + 4);

 		return 0;
 	}

 	/* Bypass clock and set lock to pll output lock */
 	tmp = readl_relaxed(pll->base);
 	tmp |= LOCK_SEL_MASK;
 	writel_relaxed(tmp, pll->base);

 	/* Enable RST */
 	tmp &= ~RST_MASK;
 	writel_relaxed(tmp, pll->base);

 	/* Enable BYPASS */
 	tmp |= BYPASS_MASK;
 	writel(tmp, pll->base);

 	div_val = (rate->mdiv << MDIV_SHIFT) | (rate->pdiv << PDIV_SHIFT) |
 		(rate->sdiv << SDIV_SHIFT);
 	writel_relaxed(div_val, pll->base + 0x4);

 	/*
 	 * According to SPEC, t3 - t2 need to be greater than
 	 * 1us and 1/FREF, respectively.
 	 * FREF is FIN / Prediv, the prediv is [1, 63], so choose
 	 * 3us.
 	 */
 	udelay(3);

 	/* Disable RST */
 	tmp |= RST_MASK;
 	writel_relaxed(tmp, pll->base);

 	/* Wait Lock */
 	ret = clk_pll14xx_wait_lock(pll);
 	if (ret)
 		return ret;

 	/* Bypass */
 	tmp &= ~BYPASS_MASK;
 	writel_relaxed(tmp, pll->base);

 	return 0;
 }

 static int clk_pll1443x_set_rate(struct clk_hw *hw, unsigned long drate,
 				 unsigned long prate)
 {
 	struct clk_pll14xx *pll = to_clk_pll14xx(hw);
 	const struct imx_pll14xx_rate_table *rate;
 	u32 tmp, div_val;
 	int ret;

 	rate = imx_get_pll_settings(pll, drate);
 	if (!rate) {
 		pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
 			drate, clk_hw_get_name(hw));
 		return -EINVAL;
 	}

 	tmp = readl_relaxed(pll->base + 4);

 	if (!clk_pll14xx_mp_change(rate, tmp)) {
 		tmp &= ~(SDIV_MASK) << SDIV_SHIFT;
 		tmp |= rate->sdiv << SDIV_SHIFT;
 		writel_relaxed(tmp, pll->base + 4);

 		tmp = rate->kdiv << KDIV_SHIFT;
 		writel_relaxed(tmp, pll->base + 8);

 		return 0;
 	}

 	/* Enable RST */
 	tmp = readl_relaxed(pll->base);
 	tmp &= ~RST_MASK;
 	writel_relaxed(tmp, pll->base);

 	/* Enable BYPASS */
 	tmp |= BYPASS_MASK;
 	writel_relaxed(tmp, pll->base);

 	div_val = (rate->mdiv << MDIV_SHIFT) | (rate->pdiv << PDIV_SHIFT) |
 		(rate->sdiv << SDIV_SHIFT);
 	writel_relaxed(div_val, pll->base + 0x4);
 	writel_relaxed(rate->kdiv << KDIV_SHIFT, pll->base + 0x8);

 	/*
 	 * According to SPEC, t3 - t2 need to be greater than
 	 * 1us and 1/FREF, respectively.
 	 * FREF is FIN / Prediv, the prediv is [1, 63], so choose
 	 * 3us.
 	 */
 	udelay(3);

 	/* Disable RST */
 	tmp |= RST_MASK;
 	writel_relaxed(tmp, pll->base);

 	/* Wait Lock*/
 	ret = clk_pll14xx_wait_lock(pll);
 	if (ret)
 		return ret;

 	/* Bypass */
 	tmp &= ~BYPASS_MASK;
 	writel_relaxed(tmp, pll->base);

 	return 0;
 }

 static int clk_pll14xx_prepare(struct clk_hw *hw)
 {
 	struct clk_pll14xx *pll = to_clk_pll14xx(hw);
 	u32 val;
 	int ret;

 	/*
 	 * RESETB = 1 from 0, PLL starts its normal
 	 * operation after lock time
 	 */
 	val = readl_relaxed(pll->base + GNRL_CTL);
 	if (val & RST_MASK)
 		return 0;
 	val |= BYPASS_MASK;
 	writel_relaxed(val, pll->base + GNRL_CTL);
 	val |= RST_MASK;
 	writel_relaxed(val, pll->base + GNRL_CTL);

 	ret = clk_pll14xx_wait_lock(pll);
 	if (ret)
 		return ret;

 	val &= ~BYPASS_MASK;
 	writel_relaxed(val, pll->base + GNRL_CTL);

 	return 0;
 }

 static int clk_pll14xx_is_prepared(struct clk_hw *hw)
 {
 	struct clk_pll14xx *pll = to_clk_pll14xx(hw);
 	u32 val;

 	val = readl_relaxed(pll->base + GNRL_CTL);

 	return (val & RST_MASK) ? 1 : 0;
 }

 static void clk_pll14xx_unprepare(struct clk_hw *hw)
 {
 	struct clk_pll14xx *pll = to_clk_pll14xx(hw);
 	u32 val;

 	/*
 	 * Set RST to 0, power down mode is enabled and
 	 * every digital block is reset
 	 */
 	val = readl_relaxed(pll->base + GNRL_CTL);
 	val &= ~RST_MASK;
 	writel_relaxed(val, pll->base + GNRL_CTL);
 }

 static const struct clk_ops clk_pll1416x_ops = {
 	.prepare	= clk_pll14xx_prepare,
 	.unprepare	= clk_pll14xx_unprepare,
 	.is_prepared	= clk_pll14xx_is_prepared,
 	.recalc_rate	= clk_pll1416x_recalc_rate,
 	.round_rate	= clk_pll14xx_round_rate,
 	.set_rate	= clk_pll1416x_set_rate,
 };

 static const struct clk_ops clk_pll1416x_min_ops = {
 	.recalc_rate	= clk_pll1416x_recalc_rate,
 };

 static const struct clk_ops clk_pll1443x_ops = {
 	.prepare	= clk_pll14xx_prepare,
 	.unprepare	= clk_pll14xx_unprepare,
 	.is_prepared	= clk_pll14xx_is_prepared,
 	.recalc_rate	= clk_pll1443x_recalc_rate,
 	.round_rate	= clk_pll14xx_round_rate,
 	.set_rate	= clk_pll1443x_set_rate,
 };

 struct clk_hw *imx_clk_hw_pll14xx(const char *name, const char *parent_name,
 				  void __iomem *base,
 				  const struct imx_pll14xx_clk *pll_clk)
 {
 	struct clk_pll14xx *pll;
 	struct clk_hw *hw;
 	struct clk_init_data init;
 	int ret;
 	u32 val;

 	pll = kzalloc(sizeof(*pll), GFP_KERNEL);
 	if (!pll)
 		return ERR_PTR(-ENOMEM);

 	init.name = name;
 	init.flags = pll_clk->flags;
 	init.parent_names = &parent_name;
 	init.num_parents = 1;

 	switch (pll_clk->type) {
 	case PLL_1416X:
 		if (!pll_clk->rate_table)
 			init.ops = &clk_pll1416x_min_ops;
 		else
 			init.ops = &clk_pll1416x_ops;
 		break;
 	case PLL_1443X:
 		init.ops = &clk_pll1443x_ops;
 		break;
 	default:
 		pr_err("%s: Unknown pll type for pll clk %s\n",
 		       __func__, name);
 	};

 	pll->base = base;
 	pll->hw.init = &init;
 	pll->type = pll_clk->type;
 	pll->rate_table = pll_clk->rate_table;
 	pll->rate_count = pll_clk->rate_count;

 	val = readl_relaxed(pll->base + GNRL_CTL);
 	val &= ~BYPASS_MASK;
 	writel_relaxed(val, pll->base + GNRL_CTL);

 	hw = &pll->hw;

 	ret = clk_hw_register(NULL, hw);
 	if (ret) {
 		pr_err("%s: failed to register pll %s %d\n",
 			__func__, name, ret);
 		kfree(pll);
 		return ERR_PTR(ret);
 	}

 	return hw;
 }
	// SPDX-License-Identifier: GPL-2.0
	/*
	* Copyright 2017-2018 NXP.
	*/

	#include <linux/bitops.h>
	#include <linux/clk-provider.h>
	#include <linux/err.h>
	#include <linux/io.h>
	#include <linux/iopoll.h>
	#include <linux/slab.h>
	#include <linux/jiffies.h>

	#include "clk.h"

	#define GNRL_CTL 0x0
	#define DIV_CTL 0x4
	#define LOCK_STATUS BIT(31)
	#define LOCK_SEL_MASK BIT(29)
	#define CLKE_MASK BIT(11)
	#define RST_MASK BIT(9)
	#define BYPASS_MASK BIT(4)
	#define MDIV_SHIFT 12
	#define MDIV_MASK GENMASK(21, 12)
	#define PDIV_SHIFT 4
	#define PDIV_MASK GENMASK(9, 4)
	#define SDIV_SHIFT 0
	#define SDIV_MASK GENMASK(2, 0)
	#define KDIV_SHIFT 0
	#define KDIV_MASK GENMASK(15, 0)

	#define LOCK_TIMEOUT_US 10000

	struct clk_pll14xx {
	struct clk_hw hw;
	void __iomem *base;
	enum imx_pll14xx_type type;
	const struct imx_pll14xx_rate_table *rate_table;
	int rate_count;
	};

	#define to_clk_pll14xx(_hw) container_of(_hw, struct clk_pll14xx, hw)

	static const struct imx_pll14xx_rate_table imx_pll1416x_tbl[] = {
	PLL_1416X_RATE(1800000000U, 225, 3, 0),
	PLL_1416X_RATE(1600000000U, 200, 3, 0),
	PLL_1416X_RATE(1500000000U, 375, 3, 1),
	PLL_1416X_RATE(1400000000U, 350, 3, 1),
	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 imx_pll1443x_tbl[] = {
	PLL_1443X_RATE(650000000U, 325, 3, 2, 0),
	PLL_1443X_RATE(594000000U, 198, 2, 2, 0),
	PLL_1443X_RATE(393216000U, 262, 2, 3, 9437),
	PLL_1443X_RATE(361267200U, 361, 3, 3, 17511),
	};

	struct imx_pll14xx_clk imx_1443x_pll = {
	.type = PLL_1443X,
	.rate_table = imx_pll1443x_tbl,
	.rate_count = ARRAY_SIZE(imx_pll1443x_tbl),
	};

	struct imx_pll14xx_clk imx_1443x_dram_pll = {
	.type = PLL_1443X,
	.rate_table = imx_pll1443x_tbl,
	.rate_count = ARRAY_SIZE(imx_pll1443x_tbl),
	.flags = CLK_GET_RATE_NOCACHE,
	};

	struct imx_pll14xx_clk imx_1416x_pll = {
	.type = PLL_1416X,
	.rate_table = imx_pll1416x_tbl,
	.rate_count = ARRAY_SIZE(imx_pll1416x_tbl),
	};

	static const struct imx_pll14xx_rate_table *imx_get_pll_settings(
	struct clk_pll14xx *pll, unsigned long rate)
	{
	const struct imx_pll14xx_rate_table *rate_table = pll->rate_table;
	int i;

	for (i = 0; i < pll->rate_count; i++)
	if (rate == rate_table[i].rate)
	return &rate_table[i];

	return NULL;
	}

	static long clk_pll14xx_round_rate(struct clk_hw *hw, unsigned long rate,
	unsigned long *prate)
	{
	struct clk_pll14xx *pll = to_clk_pll14xx(hw);
	const struct imx_pll14xx_rate_table *rate_table = pll->rate_table;
	int i;

	/* Assumming rate_table is in descending order */
	for (i = 0; i < pll->rate_count; i++)
	if (rate >= rate_table[i].rate)
	return rate_table[i].rate;

	/* return minimum supported value */
	return rate_table[i - 1].rate;
	}

	static unsigned long clk_pll1416x_recalc_rate(struct clk_hw *hw,
	unsigned long parent_rate)
	{
	struct clk_pll14xx *pll = to_clk_pll14xx(hw);
	u32 mdiv, pdiv, sdiv, pll_div;
	u64 fvco = parent_rate;

	pll_div = readl_relaxed(pll->base + 4);
	mdiv = (pll_div & MDIV_MASK) >> MDIV_SHIFT;
	pdiv = (pll_div & PDIV_MASK) >> PDIV_SHIFT;
	sdiv = (pll_div & SDIV_MASK) >> SDIV_SHIFT;

	fvco *= mdiv;
	do_div(fvco, pdiv << sdiv);

	return fvco;
	}

	static unsigned long clk_pll1443x_recalc_rate(struct clk_hw *hw,
	unsigned long parent_rate)
	{
	struct clk_pll14xx *pll = to_clk_pll14xx(hw);
	u32 mdiv, pdiv, sdiv, pll_div_ctl0, pll_div_ctl1;
	short int kdiv;
	u64 fvco = parent_rate;

	pll_div_ctl0 = readl_relaxed(pll->base + 4);
	pll_div_ctl1 = readl_relaxed(pll->base + 8);
	mdiv = (pll_div_ctl0 & MDIV_MASK) >> MDIV_SHIFT;
	pdiv = (pll_div_ctl0 & PDIV_MASK) >> PDIV_SHIFT;
	sdiv = (pll_div_ctl0 & SDIV_MASK) >> SDIV_SHIFT;
	kdiv = pll_div_ctl1 & KDIV_MASK;

	/* fvco = (m * 65536 + k) * Fin / (p * 65536) */
	fvco = (mdiv 65536 + kdiv);
	pdiv *= 65536;

	do_div(fvco, pdiv << sdiv);

	return fvco;
	}

	static inline bool clk_pll14xx_mp_change(const struct imx_pll14xx_rate_table *rate,
	u32 pll_div)
	{
	u32 old_mdiv, old_pdiv;

	old_mdiv = (pll_div & MDIV_MASK) >> MDIV_SHIFT;
	old_pdiv = (pll_div & PDIV_MASK) >> PDIV_SHIFT;

	return rate->mdiv != old_mdiv \|\| rate->pdiv != old_pdiv;
	}

	static int clk_pll14xx_wait_lock(struct clk_pll14xx *pll)
	{
	u32 val;

	return readl_poll_timeout(pll->base, val, val & LOCK_STATUS, 0,
	LOCK_TIMEOUT_US);
	}

	static int clk_pll1416x_set_rate(struct clk_hw *hw, unsigned long drate,
	unsigned long prate)
	{
	struct clk_pll14xx *pll = to_clk_pll14xx(hw);
	const struct imx_pll14xx_rate_table *rate;
	u32 tmp, div_val;
	int ret;

	rate = imx_get_pll_settings(pll, drate);
	if (!rate) {
	pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
	drate, clk_hw_get_name(hw));
	return -EINVAL;
	}

	tmp = readl_relaxed(pll->base + 4);

	if (!clk_pll14xx_mp_change(rate, tmp)) {
	tmp &= ~(SDIV_MASK) << SDIV_SHIFT;
	tmp \|= rate->sdiv << SDIV_SHIFT;
	writel_relaxed(tmp, pll->base + 4);

	return 0;
	}

	/* Bypass clock and set lock to pll output lock */
	tmp = readl_relaxed(pll->base);
	tmp \|= LOCK_SEL_MASK;
	writel_relaxed(tmp, pll->base);

	/* Enable RST */
	tmp &= ~RST_MASK;
	writel_relaxed(tmp, pll->base);

	/* Enable BYPASS */
	tmp \|= BYPASS_MASK;
	writel(tmp, pll->base);

	div_val = (rate->mdiv << MDIV_SHIFT) \| (rate->pdiv << PDIV_SHIFT) \|
	(rate->sdiv << SDIV_SHIFT);
	writel_relaxed(div_val, pll->base + 0x4);

	/*
	* According to SPEC, t3 - t2 need to be greater than
	* 1us and 1/FREF, respectively.
	* FREF is FIN / Prediv, the prediv is [1, 63], so choose
	* 3us.
	*/
	udelay(3);

	/* Disable RST */
	tmp \|= RST_MASK;
	writel_relaxed(tmp, pll->base);

	/* Wait Lock */
	ret = clk_pll14xx_wait_lock(pll);
	if (ret)
	return ret;

	/* Bypass */
	tmp &= ~BYPASS_MASK;
	writel_relaxed(tmp, pll->base);

	return 0;
	}

	static int clk_pll1443x_set_rate(struct clk_hw *hw, unsigned long drate,
	unsigned long prate)
	{
	struct clk_pll14xx *pll = to_clk_pll14xx(hw);
	const struct imx_pll14xx_rate_table *rate;
	u32 tmp, div_val;
	int ret;

	rate = imx_get_pll_settings(pll, drate);
	if (!rate) {
	pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
	drate, clk_hw_get_name(hw));
	return -EINVAL;
	}

	tmp = readl_relaxed(pll->base + 4);

	if (!clk_pll14xx_mp_change(rate, tmp)) {
	tmp &= ~(SDIV_MASK) << SDIV_SHIFT;
	tmp \|= rate->sdiv << SDIV_SHIFT;
	writel_relaxed(tmp, pll->base + 4);

	tmp = rate->kdiv << KDIV_SHIFT;
	writel_relaxed(tmp, pll->base + 8);

	return 0;
	}

	/* Enable RST */
	tmp = readl_relaxed(pll->base);
	tmp &= ~RST_MASK;
	writel_relaxed(tmp, pll->base);

	/* Enable BYPASS */
	tmp \|= BYPASS_MASK;
	writel_relaxed(tmp, pll->base);

	div_val = (rate->mdiv << MDIV_SHIFT) \| (rate->pdiv << PDIV_SHIFT) \|
	(rate->sdiv << SDIV_SHIFT);
	writel_relaxed(div_val, pll->base + 0x4);
	writel_relaxed(rate->kdiv << KDIV_SHIFT, pll->base + 0x8);

	/*
	* According to SPEC, t3 - t2 need to be greater than
	* 1us and 1/FREF, respectively.
	* FREF is FIN / Prediv, the prediv is [1, 63], so choose
	* 3us.
	*/
	udelay(3);

	/* Disable RST */
	tmp \|= RST_MASK;
	writel_relaxed(tmp, pll->base);

	/* Wait Lock*/
	ret = clk_pll14xx_wait_lock(pll);
	if (ret)
	return ret;

	/* Bypass */
	tmp &= ~BYPASS_MASK;
	writel_relaxed(tmp, pll->base);

	return 0;
	}

	static int clk_pll14xx_prepare(struct clk_hw *hw)
	{
	struct clk_pll14xx *pll = to_clk_pll14xx(hw);
	u32 val;
	int ret;

	/*
	* RESETB = 1 from 0, PLL starts its normal
	* operation after lock time
	*/
	val = readl_relaxed(pll->base + GNRL_CTL);
	if (val & RST_MASK)
	return 0;
	val \|= BYPASS_MASK;
	writel_relaxed(val, pll->base + GNRL_CTL);
	val \|= RST_MASK;
	writel_relaxed(val, pll->base + GNRL_CTL);

	ret = clk_pll14xx_wait_lock(pll);
	if (ret)
	return ret;

	val &= ~BYPASS_MASK;
	writel_relaxed(val, pll->base + GNRL_CTL);

	return 0;
	}

	static int clk_pll14xx_is_prepared(struct clk_hw *hw)
	{
	struct clk_pll14xx *pll = to_clk_pll14xx(hw);
	u32 val;

	val = readl_relaxed(pll->base + GNRL_CTL);

	return (val & RST_MASK) ? 1 : 0;
	}

	static void clk_pll14xx_unprepare(struct clk_hw *hw)
	{
	struct clk_pll14xx *pll = to_clk_pll14xx(hw);
	u32 val;

	/*
	* Set RST to 0, power down mode is enabled and
	* every digital block is reset
	*/
	val = readl_relaxed(pll->base + GNRL_CTL);
	val &= ~RST_MASK;
	writel_relaxed(val, pll->base + GNRL_CTL);
	}

	static const struct clk_ops clk_pll1416x_ops = {
	.prepare = clk_pll14xx_prepare,
	.unprepare = clk_pll14xx_unprepare,
	.is_prepared = clk_pll14xx_is_prepared,
	.recalc_rate = clk_pll1416x_recalc_rate,
	.round_rate = clk_pll14xx_round_rate,
	.set_rate = clk_pll1416x_set_rate,
	};

	static const struct clk_ops clk_pll1416x_min_ops = {
	.recalc_rate = clk_pll1416x_recalc_rate,
	};

	static const struct clk_ops clk_pll1443x_ops = {
	.prepare = clk_pll14xx_prepare,
	.unprepare = clk_pll14xx_unprepare,
	.is_prepared = clk_pll14xx_is_prepared,
	.recalc_rate = clk_pll1443x_recalc_rate,
	.round_rate = clk_pll14xx_round_rate,
	.set_rate = clk_pll1443x_set_rate,
	};

	struct clk_hw imx_clk_hw_pll14xx(const char name, const char *parent_name,
	void __iomem *base,
	const struct imx_pll14xx_clk *pll_clk)
	{
	struct clk_pll14xx *pll;
	struct clk_hw *hw;
	struct clk_init_data init;
	int ret;
	u32 val;

	pll = kzalloc(sizeof(*pll), GFP_KERNEL);
	if (!pll)
	return ERR_PTR(-ENOMEM);

	init.name = name;
	init.flags = pll_clk->flags;
	init.parent_names = &parent_name;
	init.num_parents = 1;

	switch (pll_clk->type) {
	case PLL_1416X:
	if (!pll_clk->rate_table)
	init.ops = &clk_pll1416x_min_ops;
	else
	init.ops = &clk_pll1416x_ops;
	break;
	case PLL_1443X:
	init.ops = &clk_pll1443x_ops;
	break;
	default:
	pr_err("%s: Unknown pll type for pll clk %s\n",
	__func__, name);
	};

	pll->base = base;
	pll->hw.init = &init;
	pll->type = pll_clk->type;
	pll->rate_table = pll_clk->rate_table;
	pll->rate_count = pll_clk->rate_count;

	val = readl_relaxed(pll->base + GNRL_CTL);
	val &= ~BYPASS_MASK;
	writel_relaxed(val, pll->base + GNRL_CTL);

	hw = &pll->hw;

	ret = clk_hw_register(NULL, hw);
	if (ret) {
	pr_err("%s: failed to register pll %s %d\n",
	__func__, name, ret);
	kfree(pll);
	return ERR_PTR(ret);
	}

	return hw;
	}