drivers/clk/imx/clk-pllv3.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Copyright 2012 Freescale Semiconductor, Inc.
  * Copyright 2012 Linaro Ltd.
  */

 #include <linux/clk-provider.h>
 #include <linux/delay.h>
 #include <linux/io.h>
 #include <linux/slab.h>
 #include <linux/jiffies.h>
 #include <linux/err.h>
 #include "clk.h"

 #define PLL_NUM_OFFSET		0x10
 #define PLL_DENOM_OFFSET	0x20
 #define PLL_IMX7_NUM_OFFSET	0x20
 #define PLL_IMX7_DENOM_OFFSET	0x30

 #define PLL_VF610_NUM_OFFSET	0x20
 #define PLL_VF610_DENOM_OFFSET	0x30

 #define BM_PLL_POWER		(0x1 << 12)
 #define BM_PLL_LOCK		(0x1 << 31)
 #define IMX7_ENET_PLL_POWER	(0x1 << 5)
 #define IMX7_DDR_PLL_POWER	(0x1 << 20)

 /**
  * struct clk_pllv3 - IMX PLL clock version 3
  * @clk_hw:	 clock source
  * @base:	 base address of PLL registers
  * @power_bit:	 pll power bit mask
  * @powerup_set: set power_bit to power up the PLL
  * @div_mask:	 mask of divider bits
  * @div_shift:	 shift of divider bits
  *
  * IMX PLL clock version 3, found on i.MX6 series.  Divider for pllv3
  * is actually a multiplier, and always sits at bit 0.
  */
 struct clk_pllv3 {
 	struct clk_hw	hw;
 	void __iomem	*base;
 	u32		power_bit;
 	bool		powerup_set;
 	u32		div_mask;
 	u32		div_shift;
 	unsigned long	ref_clock;
 	u32		num_offset;
 	u32		denom_offset;
 };

 #define to_clk_pllv3(_hw) container_of(_hw, struct clk_pllv3, hw)

 static int clk_pllv3_wait_lock(struct clk_pllv3 *pll)
 {
 	unsigned long timeout = jiffies + msecs_to_jiffies(10);
 	u32 val = readl_relaxed(pll->base) & pll->power_bit;

 	/* No need to wait for lock when pll is not powered up */
 	if ((pll->powerup_set && !val) || (!pll->powerup_set && val))
 		return 0;

 	/* Wait for PLL to lock */
 	do {
 		if (readl_relaxed(pll->base) & BM_PLL_LOCK)
 			break;
 		if (time_after(jiffies, timeout))
 			break;
 		usleep_range(50, 500);
 	} while (1);

 	return readl_relaxed(pll->base) & BM_PLL_LOCK ? 0 : -ETIMEDOUT;
 }

 static int clk_pllv3_prepare(struct clk_hw *hw)
 {
 	struct clk_pllv3 *pll = to_clk_pllv3(hw);
 	u32 val;

 	val = readl_relaxed(pll->base);
 	if (pll->powerup_set)
 		val |= pll->power_bit;
 	else
 		val &= ~pll->power_bit;
 	writel_relaxed(val, pll->base);

 	return clk_pllv3_wait_lock(pll);
 }

 static void clk_pllv3_unprepare(struct clk_hw *hw)
 {
 	struct clk_pllv3 *pll = to_clk_pllv3(hw);
 	u32 val;

 	val = readl_relaxed(pll->base);
 	if (pll->powerup_set)
 		val &= ~pll->power_bit;
 	else
 		val |= pll->power_bit;
 	writel_relaxed(val, pll->base);
 }

 static int clk_pllv3_is_prepared(struct clk_hw *hw)
 {
 	struct clk_pllv3 *pll = to_clk_pllv3(hw);

 	if (readl_relaxed(pll->base) & BM_PLL_LOCK)
 		return 1;

 	return 0;
 }

 static unsigned long clk_pllv3_recalc_rate(struct clk_hw *hw,
 					   unsigned long parent_rate)
 {
 	struct clk_pllv3 *pll = to_clk_pllv3(hw);
 	u32 div = (readl_relaxed(pll->base) >> pll->div_shift)  & pll->div_mask;

 	return (div == 1) ? parent_rate * 22 : parent_rate * 20;
 }

 static long clk_pllv3_round_rate(struct clk_hw *hw, unsigned long rate,
 				 unsigned long *prate)
 {
 	unsigned long parent_rate = *prate;

 	return (rate >= parent_rate * 22) ? parent_rate * 22 :
 					    parent_rate * 20;
 }

 static int clk_pllv3_set_rate(struct clk_hw *hw, unsigned long rate,
 		unsigned long parent_rate)
 {
 	struct clk_pllv3 *pll = to_clk_pllv3(hw);
 	u32 val, div;

 	if (rate == parent_rate * 22)
 		div = 1;
 	else if (rate == parent_rate * 20)
 		div = 0;
 	else
 		return -EINVAL;

 	val = readl_relaxed(pll->base);
 	val &= ~(pll->div_mask << pll->div_shift);
 	val |= (div << pll->div_shift);
 	writel_relaxed(val, pll->base);

 	return clk_pllv3_wait_lock(pll);
 }

 static const struct clk_ops clk_pllv3_ops = {
 	.prepare	= clk_pllv3_prepare,
 	.unprepare	= clk_pllv3_unprepare,
 	.is_prepared	= clk_pllv3_is_prepared,
 	.recalc_rate	= clk_pllv3_recalc_rate,
 	.round_rate	= clk_pllv3_round_rate,
 	.set_rate	= clk_pllv3_set_rate,
 };

 static unsigned long clk_pllv3_sys_recalc_rate(struct clk_hw *hw,
 					       unsigned long parent_rate)
 {
 	struct clk_pllv3 *pll = to_clk_pllv3(hw);
 	u32 div = readl_relaxed(pll->base) & pll->div_mask;

 	return parent_rate * div / 2;
 }

 static long clk_pllv3_sys_round_rate(struct clk_hw *hw, unsigned long rate,
 				     unsigned long *prate)
 {
 	unsigned long parent_rate = *prate;
 	unsigned long min_rate = parent_rate * 54 / 2;
 	unsigned long max_rate = parent_rate * 108 / 2;
 	u32 div;

 	if (rate > max_rate)
 		rate = max_rate;
 	else if (rate < min_rate)
 		rate = min_rate;
 	div = rate * 2 / parent_rate;

 	return parent_rate * div / 2;
 }

 static int clk_pllv3_sys_set_rate(struct clk_hw *hw, unsigned long rate,
 		unsigned long parent_rate)
 {
 	struct clk_pllv3 *pll = to_clk_pllv3(hw);
 	unsigned long min_rate = parent_rate * 54 / 2;
 	unsigned long max_rate = parent_rate * 108 / 2;
 	u32 val, div;

 	if (rate < min_rate || rate > max_rate)
 		return -EINVAL;

 	div = rate * 2 / parent_rate;
 	val = readl_relaxed(pll->base);
 	val &= ~pll->div_mask;
 	val |= div;
 	writel_relaxed(val, pll->base);

 	return clk_pllv3_wait_lock(pll);
 }

 static const struct clk_ops clk_pllv3_sys_ops = {
 	.prepare	= clk_pllv3_prepare,
 	.unprepare	= clk_pllv3_unprepare,
 	.is_prepared	= clk_pllv3_is_prepared,
 	.recalc_rate	= clk_pllv3_sys_recalc_rate,
 	.round_rate	= clk_pllv3_sys_round_rate,
 	.set_rate	= clk_pllv3_sys_set_rate,
 };

 static unsigned long clk_pllv3_av_recalc_rate(struct clk_hw *hw,
 					      unsigned long parent_rate)
 {
 	struct clk_pllv3 *pll = to_clk_pllv3(hw);
 	u32 mfn = readl_relaxed(pll->base + pll->num_offset);
 	u32 mfd = readl_relaxed(pll->base + pll->denom_offset);
 	u32 div = readl_relaxed(pll->base) & pll->div_mask;
 	u64 temp64 = (u64)parent_rate;

 	temp64 *= mfn;
 	do_div(temp64, mfd);

 	return parent_rate * div + (unsigned long)temp64;
 }

 static long clk_pllv3_av_round_rate(struct clk_hw *hw, unsigned long rate,
 				    unsigned long *prate)
 {
 	unsigned long parent_rate = *prate;
 	unsigned long min_rate = parent_rate * 27;
 	unsigned long max_rate = parent_rate * 54;
 	u32 div;
 	u32 mfn, mfd = 1000000;
 	u32 max_mfd = 0x3FFFFFFF;
 	u64 temp64;

 	if (rate > max_rate)
 		rate = max_rate;
 	else if (rate < min_rate)
 		rate = min_rate;

 	if (parent_rate <= max_mfd)
 		mfd = parent_rate;

 	div = rate / parent_rate;
 	temp64 = (u64) (rate - div * parent_rate);
 	temp64 *= mfd;
 	do_div(temp64, parent_rate);
 	mfn = temp64;

 	temp64 = (u64)parent_rate;
 	temp64 *= mfn;
 	do_div(temp64, mfd);

 	return parent_rate * div + (unsigned long)temp64;
 }

 static int clk_pllv3_av_set_rate(struct clk_hw *hw, unsigned long rate,
 		unsigned long parent_rate)
 {
 	struct clk_pllv3 *pll = to_clk_pllv3(hw);
 	unsigned long min_rate = parent_rate * 27;
 	unsigned long max_rate = parent_rate * 54;
 	u32 val, div;
 	u32 mfn, mfd = 1000000;
 	u32 max_mfd = 0x3FFFFFFF;
 	u64 temp64;

 	if (rate < min_rate || rate > max_rate)
 		return -EINVAL;

 	if (parent_rate <= max_mfd)
 		mfd = parent_rate;

 	div = rate / parent_rate;
 	temp64 = (u64) (rate - div * parent_rate);
 	temp64 *= mfd;
 	do_div(temp64, parent_rate);
 	mfn = temp64;

 	val = readl_relaxed(pll->base);
 	val &= ~pll->div_mask;
 	val |= div;
 	writel_relaxed(val, pll->base);
 	writel_relaxed(mfn, pll->base + pll->num_offset);
 	writel_relaxed(mfd, pll->base + pll->denom_offset);

 	return clk_pllv3_wait_lock(pll);
 }

 static const struct clk_ops clk_pllv3_av_ops = {
 	.prepare	= clk_pllv3_prepare,
 	.unprepare	= clk_pllv3_unprepare,
 	.is_prepared	= clk_pllv3_is_prepared,
 	.recalc_rate	= clk_pllv3_av_recalc_rate,
 	.round_rate	= clk_pllv3_av_round_rate,
 	.set_rate	= clk_pllv3_av_set_rate,
 };

 struct clk_pllv3_vf610_mf {
 	u32 mfi;	/* integer part, can be 20 or 22 */
 	u32 mfn;	/* numerator, 30-bit value */
 	u32 mfd;	/* denominator, 30-bit value, must be less than mfn */
 };

 static unsigned long clk_pllv3_vf610_mf_to_rate(unsigned long parent_rate,
 		struct clk_pllv3_vf610_mf mf)
 {
 	u64 temp64;

 	temp64 = parent_rate;
 	temp64 *= mf.mfn;
 	do_div(temp64, mf.mfd);

 	return (parent_rate * mf.mfi) + temp64;
 }

 static struct clk_pllv3_vf610_mf clk_pllv3_vf610_rate_to_mf(
 		unsigned long parent_rate, unsigned long rate)
 {
 	struct clk_pllv3_vf610_mf mf;
 	u64 temp64;

 	mf.mfi = (rate >= 22 * parent_rate) ? 22 : 20;
 	mf.mfd = 0x3fffffff;	/* use max supported value for best accuracy */

 	if (rate <= parent_rate * mf.mfi)
 		mf.mfn = 0;
 	else if (rate >= parent_rate * (mf.mfi + 1))
 		mf.mfn = mf.mfd - 1;
 	else {
 		/* rate = parent_rate * (mfi + mfn/mfd) */
 		temp64 = rate - parent_rate * mf.mfi;
 		temp64 *= mf.mfd;
 		do_div(temp64, parent_rate);
 		mf.mfn = temp64;
 	}

 	return mf;
 }

 static unsigned long clk_pllv3_vf610_recalc_rate(struct clk_hw *hw,
 					      unsigned long parent_rate)
 {
 	struct clk_pllv3 *pll = to_clk_pllv3(hw);
 	struct clk_pllv3_vf610_mf mf;

 	mf.mfn = readl_relaxed(pll->base + pll->num_offset);
 	mf.mfd = readl_relaxed(pll->base + pll->denom_offset);
 	mf.mfi = (readl_relaxed(pll->base) & pll->div_mask) ? 22 : 20;

 	return clk_pllv3_vf610_mf_to_rate(parent_rate, mf);
 }

 static long clk_pllv3_vf610_round_rate(struct clk_hw *hw, unsigned long rate,
 				    unsigned long *prate)
 {
 	struct clk_pllv3_vf610_mf mf = clk_pllv3_vf610_rate_to_mf(*prate, rate);

 	return clk_pllv3_vf610_mf_to_rate(*prate, mf);
 }

 static int clk_pllv3_vf610_set_rate(struct clk_hw *hw, unsigned long rate,
 		unsigned long parent_rate)
 {
 	struct clk_pllv3 *pll = to_clk_pllv3(hw);
 	struct clk_pllv3_vf610_mf mf =
 			clk_pllv3_vf610_rate_to_mf(parent_rate, rate);
 	u32 val;

 	val = readl_relaxed(pll->base);
 	if (mf.mfi == 20)
 		val &= ~pll->div_mask;	/* clear bit for mfi=20 */
 	else
 		val |= pll->div_mask;	/* set bit for mfi=22 */
 	writel_relaxed(val, pll->base);

 	writel_relaxed(mf.mfn, pll->base + pll->num_offset);
 	writel_relaxed(mf.mfd, pll->base + pll->denom_offset);

 	return clk_pllv3_wait_lock(pll);
 }

 static const struct clk_ops clk_pllv3_vf610_ops = {
 	.prepare	= clk_pllv3_prepare,
 	.unprepare	= clk_pllv3_unprepare,
 	.is_prepared	= clk_pllv3_is_prepared,
 	.recalc_rate	= clk_pllv3_vf610_recalc_rate,
 	.round_rate	= clk_pllv3_vf610_round_rate,
 	.set_rate	= clk_pllv3_vf610_set_rate,
 };

 static unsigned long clk_pllv3_enet_recalc_rate(struct clk_hw *hw,
 						unsigned long parent_rate)
 {
 	struct clk_pllv3 *pll = to_clk_pllv3(hw);

 	return pll->ref_clock;
 }

 static const struct clk_ops clk_pllv3_enet_ops = {
 	.prepare	= clk_pllv3_prepare,
 	.unprepare	= clk_pllv3_unprepare,
 	.is_prepared	= clk_pllv3_is_prepared,
 	.recalc_rate	= clk_pllv3_enet_recalc_rate,
 };

 struct clk_hw *imx_clk_hw_pllv3(enum imx_pllv3_type type, const char *name,
 			  const char *parent_name, void __iomem *base,
 			  u32 div_mask)
 {
 	struct clk_pllv3 *pll;
 	const struct clk_ops *ops;
 	struct clk_hw *hw;
 	struct clk_init_data init;
 	int ret;

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

 	pll->power_bit = BM_PLL_POWER;
 	pll->num_offset = PLL_NUM_OFFSET;
 	pll->denom_offset = PLL_DENOM_OFFSET;

 	switch (type) {
 	case IMX_PLLV3_SYS:
 		ops = &clk_pllv3_sys_ops;
 		break;
 	case IMX_PLLV3_SYS_VF610:
 		ops = &clk_pllv3_vf610_ops;
 		pll->num_offset = PLL_VF610_NUM_OFFSET;
 		pll->denom_offset = PLL_VF610_DENOM_OFFSET;
 		break;
 	case IMX_PLLV3_USB_VF610:
 		pll->div_shift = 1;
 		/* fall through */
 	case IMX_PLLV3_USB:
 		ops = &clk_pllv3_ops;
 		pll->powerup_set = true;
 		break;
 	case IMX_PLLV3_AV_IMX7:
 		pll->num_offset = PLL_IMX7_NUM_OFFSET;
 		pll->denom_offset = PLL_IMX7_DENOM_OFFSET;
 		/* fall through */
 	case IMX_PLLV3_AV:
 		ops = &clk_pllv3_av_ops;
 		break;
 	case IMX_PLLV3_ENET_IMX7:
 		pll->power_bit = IMX7_ENET_PLL_POWER;
 		pll->ref_clock = 1000000000;
 		ops = &clk_pllv3_enet_ops;
 		break;
 	case IMX_PLLV3_ENET:
 		pll->ref_clock = 500000000;
 		ops = &clk_pllv3_enet_ops;
 		break;
 	case IMX_PLLV3_DDR_IMX7:
 		pll->power_bit = IMX7_DDR_PLL_POWER;
 		pll->num_offset = PLL_IMX7_NUM_OFFSET;
 		pll->denom_offset = PLL_IMX7_DENOM_OFFSET;
 		ops = &clk_pllv3_av_ops;
 		break;
 	default:
 		ops = &clk_pllv3_ops;
 	}
 	pll->base = base;
 	pll->div_mask = div_mask;

 	init.name = name;
 	init.ops = ops;
 	init.flags = 0;
 	init.parent_names = &parent_name;
 	init.num_parents = 1;

 	pll->hw.init = &init;
 	hw = &pll->hw;

 	ret = clk_hw_register(NULL, hw);
 	if (ret) {
 		kfree(pll);
 		return ERR_PTR(ret);
 	}

 	return hw;
 }
	// SPDX-License-Identifier: GPL-2.0-or-later
	/*
	* Copyright 2012 Freescale Semiconductor, Inc.
	* Copyright 2012 Linaro Ltd.
	*/

	#include <linux/clk-provider.h>
	#include <linux/delay.h>
	#include <linux/io.h>
	#include <linux/slab.h>
	#include <linux/jiffies.h>
	#include <linux/err.h>
	#include "clk.h"

	#define PLL_NUM_OFFSET 0x10
	#define PLL_DENOM_OFFSET 0x20
	#define PLL_IMX7_NUM_OFFSET 0x20
	#define PLL_IMX7_DENOM_OFFSET 0x30

	#define PLL_VF610_NUM_OFFSET 0x20
	#define PLL_VF610_DENOM_OFFSET 0x30

	#define BM_PLL_POWER (0x1 << 12)
	#define BM_PLL_LOCK (0x1 << 31)
	#define IMX7_ENET_PLL_POWER (0x1 << 5)
	#define IMX7_DDR_PLL_POWER (0x1 << 20)

	/**
	* struct clk_pllv3 - IMX PLL clock version 3
	* @clk_hw: clock source
	* @base: base address of PLL registers
	* @power_bit: pll power bit mask
	* @powerup_set: set power_bit to power up the PLL
	* @div_mask: mask of divider bits
	* @div_shift: shift of divider bits
	*
	* IMX PLL clock version 3, found on i.MX6 series. Divider for pllv3
	* is actually a multiplier, and always sits at bit 0.
	*/
	struct clk_pllv3 {
	struct clk_hw hw;
	void __iomem *base;
	u32 power_bit;
	bool powerup_set;
	u32 div_mask;
	u32 div_shift;
	unsigned long ref_clock;
	u32 num_offset;
	u32 denom_offset;
	};

	#define to_clk_pllv3(_hw) container_of(_hw, struct clk_pllv3, hw)

	static int clk_pllv3_wait_lock(struct clk_pllv3 *pll)
	{
	unsigned long timeout = jiffies + msecs_to_jiffies(10);
	u32 val = readl_relaxed(pll->base) & pll->power_bit;

	/* No need to wait for lock when pll is not powered up */
	if ((pll->powerup_set && !val) \|\| (!pll->powerup_set && val))
	return 0;

	/* Wait for PLL to lock */
	do {
	if (readl_relaxed(pll->base) & BM_PLL_LOCK)
	break;
	if (time_after(jiffies, timeout))
	break;
	usleep_range(50, 500);
	} while (1);

	return readl_relaxed(pll->base) & BM_PLL_LOCK ? 0 : -ETIMEDOUT;
	}

	static int clk_pllv3_prepare(struct clk_hw *hw)
	{
	struct clk_pllv3 *pll = to_clk_pllv3(hw);
	u32 val;

	val = readl_relaxed(pll->base);
	if (pll->powerup_set)
	val \|= pll->power_bit;
	else
	val &= ~pll->power_bit;
	writel_relaxed(val, pll->base);

	return clk_pllv3_wait_lock(pll);
	}

	static void clk_pllv3_unprepare(struct clk_hw *hw)
	{
	struct clk_pllv3 *pll = to_clk_pllv3(hw);
	u32 val;

	val = readl_relaxed(pll->base);
	if (pll->powerup_set)
	val &= ~pll->power_bit;
	else
	val \|= pll->power_bit;
	writel_relaxed(val, pll->base);
	}

	static int clk_pllv3_is_prepared(struct clk_hw *hw)
	{
	struct clk_pllv3 *pll = to_clk_pllv3(hw);

	if (readl_relaxed(pll->base) & BM_PLL_LOCK)
	return 1;

	return 0;
	}

	static unsigned long clk_pllv3_recalc_rate(struct clk_hw *hw,
	unsigned long parent_rate)
	{
	struct clk_pllv3 *pll = to_clk_pllv3(hw);
	u32 div = (readl_relaxed(pll->base) >> pll->div_shift) & pll->div_mask;

	return (div == 1) ? parent_rate * 22 : parent_rate * 20;
	}

	static long clk_pllv3_round_rate(struct clk_hw *hw, unsigned long rate,
	unsigned long *prate)
	{
	unsigned long parent_rate = *prate;

	return (rate >= parent_rate * 22) ? parent_rate * 22 :
	parent_rate * 20;
	}

	static int clk_pllv3_set_rate(struct clk_hw *hw, unsigned long rate,
	unsigned long parent_rate)
	{
	struct clk_pllv3 *pll = to_clk_pllv3(hw);
	u32 val, div;

	if (rate == parent_rate * 22)
	div = 1;
	else if (rate == parent_rate * 20)
	div = 0;
	else
	return -EINVAL;

	val = readl_relaxed(pll->base);
	val &= ~(pll->div_mask << pll->div_shift);
	val \|= (div << pll->div_shift);
	writel_relaxed(val, pll->base);

	return clk_pllv3_wait_lock(pll);
	}

	static const struct clk_ops clk_pllv3_ops = {
	.prepare = clk_pllv3_prepare,
	.unprepare = clk_pllv3_unprepare,
	.is_prepared = clk_pllv3_is_prepared,
	.recalc_rate = clk_pllv3_recalc_rate,
	.round_rate = clk_pllv3_round_rate,
	.set_rate = clk_pllv3_set_rate,
	};

	static unsigned long clk_pllv3_sys_recalc_rate(struct clk_hw *hw,
	unsigned long parent_rate)
	{
	struct clk_pllv3 *pll = to_clk_pllv3(hw);
	u32 div = readl_relaxed(pll->base) & pll->div_mask;

	return parent_rate * div / 2;
	}

	static long clk_pllv3_sys_round_rate(struct clk_hw *hw, unsigned long rate,
	unsigned long *prate)
	{
	unsigned long parent_rate = *prate;
	unsigned long min_rate = parent_rate * 54 / 2;
	unsigned long max_rate = parent_rate * 108 / 2;
	u32 div;

	if (rate > max_rate)
	rate = max_rate;
	else if (rate < min_rate)
	rate = min_rate;
	div = rate * 2 / parent_rate;

	return parent_rate * div / 2;
	}

	static int clk_pllv3_sys_set_rate(struct clk_hw *hw, unsigned long rate,
	unsigned long parent_rate)
	{
	struct clk_pllv3 *pll = to_clk_pllv3(hw);
	unsigned long min_rate = parent_rate * 54 / 2;
	unsigned long max_rate = parent_rate * 108 / 2;
	u32 val, div;

	if (rate < min_rate \|\| rate > max_rate)
	return -EINVAL;

	div = rate * 2 / parent_rate;
	val = readl_relaxed(pll->base);
	val &= ~pll->div_mask;
	val \|= div;
	writel_relaxed(val, pll->base);

	return clk_pllv3_wait_lock(pll);
	}

	static const struct clk_ops clk_pllv3_sys_ops = {
	.prepare = clk_pllv3_prepare,
	.unprepare = clk_pllv3_unprepare,
	.is_prepared = clk_pllv3_is_prepared,
	.recalc_rate = clk_pllv3_sys_recalc_rate,
	.round_rate = clk_pllv3_sys_round_rate,
	.set_rate = clk_pllv3_sys_set_rate,
	};

	static unsigned long clk_pllv3_av_recalc_rate(struct clk_hw *hw,
	unsigned long parent_rate)
	{
	struct clk_pllv3 *pll = to_clk_pllv3(hw);
	u32 mfn = readl_relaxed(pll->base + pll->num_offset);
	u32 mfd = readl_relaxed(pll->base + pll->denom_offset);
	u32 div = readl_relaxed(pll->base) & pll->div_mask;
	u64 temp64 = (u64)parent_rate;

	temp64 *= mfn;
	do_div(temp64, mfd);

	return parent_rate * div + (unsigned long)temp64;
	}

	static long clk_pllv3_av_round_rate(struct clk_hw *hw, unsigned long rate,
	unsigned long *prate)
	{
	unsigned long parent_rate = *prate;
	unsigned long min_rate = parent_rate * 27;
	unsigned long max_rate = parent_rate * 54;
	u32 div;
	u32 mfn, mfd = 1000000;
	u32 max_mfd = 0x3FFFFFFF;
	u64 temp64;

	if (rate > max_rate)
	rate = max_rate;
	else if (rate < min_rate)
	rate = min_rate;

	if (parent_rate <= max_mfd)
	mfd = parent_rate;

	div = rate / parent_rate;
	temp64 = (u64) (rate - div * parent_rate);
	temp64 *= mfd;
	do_div(temp64, parent_rate);
	mfn = temp64;

	temp64 = (u64)parent_rate;
	temp64 *= mfn;
	do_div(temp64, mfd);

	return parent_rate * div + (unsigned long)temp64;
	}

	static int clk_pllv3_av_set_rate(struct clk_hw *hw, unsigned long rate,
	unsigned long parent_rate)
	{
	struct clk_pllv3 *pll = to_clk_pllv3(hw);
	unsigned long min_rate = parent_rate * 27;
	unsigned long max_rate = parent_rate * 54;
	u32 val, div;
	u32 mfn, mfd = 1000000;
	u32 max_mfd = 0x3FFFFFFF;
	u64 temp64;

	if (rate < min_rate \|\| rate > max_rate)
	return -EINVAL;

	if (parent_rate <= max_mfd)
	mfd = parent_rate;

	div = rate / parent_rate;
	temp64 = (u64) (rate - div * parent_rate);
	temp64 *= mfd;
	do_div(temp64, parent_rate);
	mfn = temp64;

	val = readl_relaxed(pll->base);
	val &= ~pll->div_mask;
	val \|= div;
	writel_relaxed(val, pll->base);
	writel_relaxed(mfn, pll->base + pll->num_offset);
	writel_relaxed(mfd, pll->base + pll->denom_offset);

	return clk_pllv3_wait_lock(pll);
	}

	static const struct clk_ops clk_pllv3_av_ops = {
	.prepare = clk_pllv3_prepare,
	.unprepare = clk_pllv3_unprepare,
	.is_prepared = clk_pllv3_is_prepared,
	.recalc_rate = clk_pllv3_av_recalc_rate,
	.round_rate = clk_pllv3_av_round_rate,
	.set_rate = clk_pllv3_av_set_rate,
	};

	struct clk_pllv3_vf610_mf {
	u32 mfi; /* integer part, can be 20 or 22 */
	u32 mfn; /* numerator, 30-bit value */
	u32 mfd; /* denominator, 30-bit value, must be less than mfn */
	};

	static unsigned long clk_pllv3_vf610_mf_to_rate(unsigned long parent_rate,
	struct clk_pllv3_vf610_mf mf)
	{
	u64 temp64;

	temp64 = parent_rate;
	temp64 *= mf.mfn;
	do_div(temp64, mf.mfd);

	return (parent_rate * mf.mfi) + temp64;
	}

	static struct clk_pllv3_vf610_mf clk_pllv3_vf610_rate_to_mf(
	unsigned long parent_rate, unsigned long rate)
	{
	struct clk_pllv3_vf610_mf mf;
	u64 temp64;

	mf.mfi = (rate >= 22 * parent_rate) ? 22 : 20;
	mf.mfd = 0x3fffffff; /* use max supported value for best accuracy */

	if (rate <= parent_rate * mf.mfi)
	mf.mfn = 0;
	else if (rate >= parent_rate * (mf.mfi + 1))
	mf.mfn = mf.mfd - 1;
	else {
	/* rate = parent_rate * (mfi + mfn/mfd) */
	temp64 = rate - parent_rate * mf.mfi;
	temp64 *= mf.mfd;
	do_div(temp64, parent_rate);
	mf.mfn = temp64;
	}

	return mf;
	}

	static unsigned long clk_pllv3_vf610_recalc_rate(struct clk_hw *hw,
	unsigned long parent_rate)
	{
	struct clk_pllv3 *pll = to_clk_pllv3(hw);
	struct clk_pllv3_vf610_mf mf;

	mf.mfn = readl_relaxed(pll->base + pll->num_offset);
	mf.mfd = readl_relaxed(pll->base + pll->denom_offset);
	mf.mfi = (readl_relaxed(pll->base) & pll->div_mask) ? 22 : 20;

	return clk_pllv3_vf610_mf_to_rate(parent_rate, mf);
	}

	static long clk_pllv3_vf610_round_rate(struct clk_hw *hw, unsigned long rate,
	unsigned long *prate)
	{
	struct clk_pllv3_vf610_mf mf = clk_pllv3_vf610_rate_to_mf(*prate, rate);

	return clk_pllv3_vf610_mf_to_rate(*prate, mf);
	}

	static int clk_pllv3_vf610_set_rate(struct clk_hw *hw, unsigned long rate,
	unsigned long parent_rate)
	{
	struct clk_pllv3 *pll = to_clk_pllv3(hw);
	struct clk_pllv3_vf610_mf mf =
	clk_pllv3_vf610_rate_to_mf(parent_rate, rate);
	u32 val;

	val = readl_relaxed(pll->base);
	if (mf.mfi == 20)
	val &= ~pll->div_mask; /* clear bit for mfi=20 */
	else
	val \|= pll->div_mask; /* set bit for mfi=22 */
	writel_relaxed(val, pll->base);

	writel_relaxed(mf.mfn, pll->base + pll->num_offset);
	writel_relaxed(mf.mfd, pll->base + pll->denom_offset);

	return clk_pllv3_wait_lock(pll);
	}

	static const struct clk_ops clk_pllv3_vf610_ops = {
	.prepare = clk_pllv3_prepare,
	.unprepare = clk_pllv3_unprepare,
	.is_prepared = clk_pllv3_is_prepared,
	.recalc_rate = clk_pllv3_vf610_recalc_rate,
	.round_rate = clk_pllv3_vf610_round_rate,
	.set_rate = clk_pllv3_vf610_set_rate,
	};

	static unsigned long clk_pllv3_enet_recalc_rate(struct clk_hw *hw,
	unsigned long parent_rate)
	{
	struct clk_pllv3 *pll = to_clk_pllv3(hw);

	return pll->ref_clock;
	}

	static const struct clk_ops clk_pllv3_enet_ops = {
	.prepare = clk_pllv3_prepare,
	.unprepare = clk_pllv3_unprepare,
	.is_prepared = clk_pllv3_is_prepared,
	.recalc_rate = clk_pllv3_enet_recalc_rate,
	};

	struct clk_hw imx_clk_hw_pllv3(enum imx_pllv3_type type, const char name,
	const char parent_name, void __iomem base,
	u32 div_mask)
	{
	struct clk_pllv3 *pll;
	const struct clk_ops *ops;
	struct clk_hw *hw;
	struct clk_init_data init;
	int ret;

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

	pll->power_bit = BM_PLL_POWER;
	pll->num_offset = PLL_NUM_OFFSET;
	pll->denom_offset = PLL_DENOM_OFFSET;

	switch (type) {
	case IMX_PLLV3_SYS:
	ops = &clk_pllv3_sys_ops;
	break;
	case IMX_PLLV3_SYS_VF610:
	ops = &clk_pllv3_vf610_ops;
	pll->num_offset = PLL_VF610_NUM_OFFSET;
	pll->denom_offset = PLL_VF610_DENOM_OFFSET;
	break;
	case IMX_PLLV3_USB_VF610:
	pll->div_shift = 1;
	/* fall through */
	case IMX_PLLV3_USB:
	ops = &clk_pllv3_ops;
	pll->powerup_set = true;
	break;
	case IMX_PLLV3_AV_IMX7:
	pll->num_offset = PLL_IMX7_NUM_OFFSET;
	pll->denom_offset = PLL_IMX7_DENOM_OFFSET;
	/* fall through */
	case IMX_PLLV3_AV:
	ops = &clk_pllv3_av_ops;
	break;
	case IMX_PLLV3_ENET_IMX7:
	pll->power_bit = IMX7_ENET_PLL_POWER;
	pll->ref_clock = 1000000000;
	ops = &clk_pllv3_enet_ops;
	break;
	case IMX_PLLV3_ENET:
	pll->ref_clock = 500000000;
	ops = &clk_pllv3_enet_ops;
	break;
	case IMX_PLLV3_DDR_IMX7:
	pll->power_bit = IMX7_DDR_PLL_POWER;
	pll->num_offset = PLL_IMX7_NUM_OFFSET;
	pll->denom_offset = PLL_IMX7_DENOM_OFFSET;
	ops = &clk_pllv3_av_ops;
	break;
	default:
	ops = &clk_pllv3_ops;
	}
	pll->base = base;
	pll->div_mask = div_mask;

	init.name = name;
	init.ops = ops;
	init.flags = 0;
	init.parent_names = &parent_name;
	init.num_parents = 1;

	pll->hw.init = &init;
	hw = &pll->hw;

	ret = clk_hw_register(NULL, hw);
	if (ret) {
	kfree(pll);
	return ERR_PTR(ret);
	}

	return hw;
	}