Subject: [PATCH v4 1/3] clk: Add regmap support

From: [email-masked] (Heiko Stuebner)
Date: Fri, 19 Jun 2015 20:10:38 +0200

Am Dienstag, 16. Juni 2015, 16:23:33 schrieb Matthias Brugger:
> Some devices like SoCs from Mediatek need to use the clock
> through a regmap interface.
> This patch adds regmap support for the simple multiplexer clock,
> the divider clock and the clock gate code.
> 
> Signed-off-by: Matthias Brugger <[email-masked]>

Looks nice now. And looking forward to using this.

Reviewed-by: Heiko Stuebner <[email-masked]>

Heiko

> ---
>  drivers/clk/Makefile         |  1 +
>  drivers/clk/clk-divider.c    | 68 +++++++++++++++++++++++++-------
>  drivers/clk/clk-gate.c       | 57 +++++++++++++++++++++------
>  drivers/clk/clk-io.c         | 48 ++++++++++++++++++++++
>  drivers/clk/clk-io.h         | 22 +++++++++++
>  drivers/clk/clk-mux.c        | 94
> +++++++++++++++++++++++++++++++++++++------- include/linux/clk-provider.h |
> 54 +++++++++++++++++++++++--
>  7 files changed, 300 insertions(+), 44 deletions(-)
>  create mode 100644 drivers/clk/clk-io.c
>  create mode 100644 drivers/clk/clk-io.h
> 
> diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
> index 3233f0e..63a94f2 100644
> --- a/drivers/clk/Makefile
> +++ b/drivers/clk/Makefile
> @@ -10,6 +10,7 @@ obj-$(CONFIG_COMMON_CLK)	+= clk-mux.o
>  obj-$(CONFIG_COMMON_CLK)	+= clk-composite.o
>  obj-$(CONFIG_COMMON_CLK)	+= clk-fractional-divider.o
>  obj-$(CONFIG_COMMON_CLK)	+= clk-gpio-gate.o
> +obj-$(CONFIG_COMMON_CLK)	+= clk-io.o
>  ifeq ($(CONFIG_OF), y)
>  obj-$(CONFIG_COMMON_CLK)	+= clk-conf.o
>  endif
> diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c
> index 706b578..411f143 100644
> --- a/drivers/clk/clk-divider.c
> +++ b/drivers/clk/clk-divider.c
> @@ -18,6 +18,8 @@
>  #include <linux/string.h>
>  #include <linux/log2.h>
> 
> +#include "clk-io.h"
> +
>  /*
>   * DOC: basic adjustable divider clock that cannot gate
>   *
> @@ -137,7 +139,8 @@ static unsigned long clk_divider_recalc_rate(struct
> clk_hw *hw, struct clk_divider *divider = to_clk_divider(hw);
>  	unsigned int val;
> 
> -	val = clk_readl(divider->reg) >> divider->shift;
> +	val = clk_io_readl(hw, divider->reg, divider->regmap, divider->offset);
> +	val >>= divider->shift;
>  	val &= div_mask(divider->width);
> 
>  	return divider_recalc_rate(hw, parent_rate, val, divider->table,
> @@ -349,7 +352,10 @@ static long clk_divider_round_rate(struct clk_hw *hw,
> unsigned long rate,
> 
>  	/* if read only, just return current value */
>  	if (divider->flags & CLK_DIVIDER_READ_ONLY) {
> -		bestdiv = readl(divider->reg) >> divider->shift;
> +		bestdiv = clk_io_readl(hw, divider->reg, divider->regmap,
> +				divider->offset);
> +
> +		bestdiv >>= divider->shift;
>  		bestdiv &= div_mask(divider->width);
>  		bestdiv = _get_div(divider->table, bestdiv, divider->flags);
>  		return DIV_ROUND_UP(*prate, bestdiv);
> @@ -392,12 +398,16 @@ static int clk_divider_set_rate(struct clk_hw *hw,
> unsigned long rate,
> 
>  	if (divider->flags & CLK_DIVIDER_HIWORD_MASK) {
>  		val = div_mask(divider->width) << (divider->shift + 16);
> +		val |= value << divider->shift;
> +		clk_io_writel(hw, divider->reg, divider->regmap,
> +			divider->offset, val);
>  	} else {
> -		val = clk_readl(divider->reg);
> -		val &= ~(div_mask(divider->width) << divider->shift);
> +		u32 mask = div_mask(divider->width) << divider->shift;
> +
> +		val = value << divider->shift;
> +		clk_io_update_bits(hw, divider->reg, divider->regmap,
> +			divider->offset, mask, val);
>  	}
> -	val |= value << divider->shift;
> -	clk_writel(val, divider->reg);
> 
>  	if (divider->lock)
>  		spin_unlock_irqrestore(divider->lock, flags);
> @@ -414,9 +424,9 @@ EXPORT_SYMBOL_GPL(clk_divider_ops);
> 
>  static struct clk *_register_divider(struct device *dev, const char *name,
>  		const char *parent_name, unsigned long flags,
> -		void __iomem *reg, u8 shift, u8 width,
> -		u8 clk_divider_flags, const struct clk_div_table *table,
> -		spinlock_t *lock)
> +		void __iomem *reg, struct regmap *regmap, u32 offset,
> +		u8 shift, u8 width, u8 clk_divider_flags,
> +		const struct clk_div_table *table, spinlock_t *lock)
>  {
>  	struct clk_divider *div;
>  	struct clk *clk;
> @@ -441,7 +451,12 @@ static struct clk *_register_divider(struct device
> *dev, const char *name, init.num_parents = (parent_name ? 1 : 0);
> 
>  	/* struct clk_divider assignments */
> -	div->reg = reg;
> +	if (flags & CLK_USE_REGMAP)
> +		div->regmap = regmap;
> +	else
> +		div->reg = reg;
> +
> +	div->offset = offset;
>  	div->shift = shift;
>  	div->width = width;
>  	div->flags = clk_divider_flags;
> @@ -475,8 +490,8 @@ struct clk *clk_register_divider(struct device *dev,
> const char *name, void __iomem *reg, u8 shift, u8 width,
>  		u8 clk_divider_flags, spinlock_t *lock)
>  {
> -	return _register_divider(dev, name, parent_name, flags, reg, shift,
> -			width, clk_divider_flags, NULL, lock);
> +	return _register_divider(dev, name, parent_name, flags, reg, NULL, 0,
> +			shift, width, clk_divider_flags, NULL, lock);
>  }
>  EXPORT_SYMBOL_GPL(clk_register_divider);
> 
> @@ -500,8 +515,8 @@ struct clk *clk_register_divider_table(struct device
> *dev, const char *name, u8 clk_divider_flags, const struct clk_div_table
> *table,
>  		spinlock_t *lock)
>  {
> -	return _register_divider(dev, name, parent_name, flags, reg, shift,
> -			width, clk_divider_flags, table, lock);
> +	return _register_divider(dev, name, parent_name, flags, reg, NULL, 0,
> +			shift, width, clk_divider_flags, table, lock);
>  }
>  EXPORT_SYMBOL_GPL(clk_register_divider_table);
> 
> @@ -520,3 +535,28 @@ void clk_unregister_divider(struct clk *clk)
>  	kfree(div);
>  }
>  EXPORT_SYMBOL_GPL(clk_unregister_divider);
> +
> +struct clk *clk_regm_register_divider(struct device *dev, const char *name,
> +		const char *parent_name, unsigned long flags,
> +		struct regmap *regmap, u32 offset, u8 shift, u8 width,
> +		u8 clk_divider_flags, spinlock_t *lock)
> +{
> +	flags |= CLK_USE_REGMAP;
> +
> +	return _register_divider(dev, name, parent_name, flags, NULL, regmap,
> +			offset,	shift, width, clk_divider_flags, NULL, lock);
> +}
> +EXPORT_SYMBOL_GPL(clk_regm_register_divider);
> +
> +struct clk *clk_regm_register_divider_table(struct device *dev,
> +		const char *name, const char *parent_name, unsigned long flags,
> +		struct regmap *regmap, u32 offset, u8 shift, u8 width,
> +		u8 clk_divider_flags, const struct clk_div_table *table,
> +		spinlock_t *lock)
> +{
> +	flags |= CLK_USE_REGMAP;
> +
> +	return _register_divider(dev, name, parent_name, flags, NULL, regmap,
> +			offset,	shift, width, clk_divider_flags, table, lock);
> +}
> +EXPORT_SYMBOL_GPL(clk_regm_register_divider_table);
> diff --git a/drivers/clk/clk-gate.c b/drivers/clk/clk-gate.c
> index 551dd06..0be95a8 100644
> --- a/drivers/clk/clk-gate.c
> +++ b/drivers/clk/clk-gate.c
> @@ -16,6 +16,8 @@
>  #include <linux/err.h>
>  #include <linux/string.h>
> 
> +#include "clk-io.h"
> +
>  /**
>   * DOC: basic gatable clock which can gate and ungate it's ouput
>   *
> @@ -46,7 +48,7 @@ static void clk_gate_endisable(struct clk_hw *hw, int
> enable) struct clk_gate *gate = to_clk_gate(hw);
>  	int set = gate->flags & CLK_GATE_SET_TO_DISABLE ? 1 : 0;
>  	unsigned long uninitialized_var(flags);
> -	u32 reg;
> +	u32 reg, mask;
> 
>  	set ^= enable;
> 
> @@ -57,16 +59,21 @@ static void clk_gate_endisable(struct clk_hw *hw, int
> enable) reg = BIT(gate->bit_idx + 16);
>  		if (set)
>  			reg |= BIT(gate->bit_idx);
> +
> +		clk_io_writel(hw, gate->reg, gate->regmap, gate->offset, reg);
>  	} else {
> -		reg = clk_readl(gate->reg);
> +		if (set) {
> +			reg = BIT(gate->bit_idx);
> +			mask = 0x0;
> +		} else {
> +			reg = 0x0;
> +			mask = BIT(gate->bit_idx);
> +		}
> 
> -		if (set)
> -			reg |= BIT(gate->bit_idx);
> -		else
> -			reg &= ~BIT(gate->bit_idx);
> +		clk_io_update_bits(hw, gate->reg, gate->regmap, gate->offset,
> +				mask, reg);
>  	}
> 
> -	clk_writel(reg, gate->reg);
> 
>  	if (gate->lock)
>  		spin_unlock_irqrestore(gate->lock, flags);
> @@ -89,7 +96,7 @@ static int clk_gate_is_enabled(struct clk_hw *hw)
>  	u32 reg;
>  	struct clk_gate *gate = to_clk_gate(hw);
> 
> -	reg = clk_readl(gate->reg);
> +	reg = clk_io_readl(hw, gate->reg, gate->regmap, gate->offset);
> 
>  	/* if a set bit disables this clk, flip it before masking */
>  	if (gate->flags & CLK_GATE_SET_TO_DISABLE)
> @@ -118,10 +125,10 @@ EXPORT_SYMBOL_GPL(clk_gate_ops);
>   * @clk_gate_flags: gate-specific flags for this clock
>   * @lock: shared register lock for this clock
>   */
> -struct clk *clk_register_gate(struct device *dev, const char *name,
> +struct clk *__clk_register_gate(struct device *dev, const char *name,
>  		const char *parent_name, unsigned long flags,
> -		void __iomem *reg, u8 bit_idx,
> -		u8 clk_gate_flags, spinlock_t *lock)
> +		void __iomem *reg, struct regmap *regmap, u32 offset,
> +		u8 bit_idx, u8 clk_gate_flags, spinlock_t *lock)
>  {
>  	struct clk_gate *gate;
>  	struct clk *clk;
> @@ -146,7 +153,12 @@ struct clk *clk_register_gate(struct device *dev, const
> char *name, init.num_parents = (parent_name ? 1 : 0);
> 
>  	/* struct clk_gate assignments */
> -	gate->reg = reg;
> +	if (flags & CLK_USE_REGMAP)
> +		gate->regmap = regmap;
> +	else
> +		gate->reg = reg;
> +
> +	gate->offset = offset;
>  	gate->bit_idx = bit_idx;
>  	gate->flags = clk_gate_flags;
>  	gate->lock = lock;
> @@ -159,6 +171,15 @@ struct clk *clk_register_gate(struct device *dev, const
> char *name,
> 
>  	return clk;
>  }
> +
> +struct clk *clk_register_gate(struct device *dev, const char *name,
> +		const char *parent_name, unsigned long flags,
> +		void __iomem *reg, u8 bit_idx,
> +		u8 clk_gate_flags, spinlock_t *lock)
> +{
> +	return __clk_register_gate(dev, name, parent_name, flags,
> +			reg, NULL, 0, bit_idx, clk_gate_flags, lock);
> +}
>  EXPORT_SYMBOL_GPL(clk_register_gate);
> 
>  void clk_unregister_gate(struct clk *clk)
> @@ -176,3 +197,15 @@ void clk_unregister_gate(struct clk *clk)
>  	kfree(gate);
>  }
>  EXPORT_SYMBOL_GPL(clk_unregister_gate);
> +
> +struct clk *clk_regm_register_gate(struct device *dev, const char *name,
> +		const char *parent_name, unsigned long flags,
> +		struct regmap *regmap, u32 offset, u8 bit_idx,
> +		u8 clk_gate_flags, spinlock_t *lock)
> +{
> +	flags |= CLK_USE_REGMAP;
> +
> +	return __clk_register_gate(dev, name, parent_name, flags,
> +			NULL, regmap, offset, bit_idx, clk_gate_flags, lock);
> +}
> +EXPORT_SYMBOL_GPL(clk_regm_register_gate);
> diff --git a/drivers/clk/clk-io.c b/drivers/clk/clk-io.c
> new file mode 100644
> index 0000000..9630ef5
> --- /dev/null
> +++ b/drivers/clk/clk-io.c
> @@ -0,0 +1,48 @@
> +/*
> + * Copyright (C) 2015 Matthias Brugger <[email-masked]>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + *
> + */
> +
> +#include <linux/clk-provider.h>
> +
> +void clk_io_writel(struct clk_hw *hw, void __iomem *reg, struct regmap
> *regmap, +			u32 offset, u32 val)
> +{
> +	if (__clk_get_flags(hw->clk) & CLK_USE_REGMAP)
> +		regmap_write(regmap, offset, val);
> +	else
> +		clk_writel(val, reg);
> +}
> +
> +u32 clk_io_readl(struct clk_hw *hw, void __iomem *reg, struct regmap
> *regmap, +			u32 offset)
> +{
> +	u32 val;
> +
> +	if (__clk_get_flags(hw->clk) & CLK_USE_REGMAP)
> +		regmap_read(regmap, offset, &val);
> +	else
> +		val = clk_readl(reg);
> +
> +	return val;
> +}
> +
> +int clk_io_update_bits(struct clk_hw *hw, void __iomem *reg,
> +			struct regmap *regmap, u32 offset, u32 mask, u32 val)
> +{
> +	unsigned int tmp;
> +
> +	if (__clk_get_flags(hw->clk) & CLK_USE_REGMAP)
> +		return regmap_update_bits(regmap, offset, mask, val);
> +
> +	tmp = clk_readl(reg);
> +	tmp &= ~mask;
> +	tmp |= val;
> +	clk_writel(tmp, reg);
> +
> +	return 0;
> +}
> diff --git a/drivers/clk/clk-io.h b/drivers/clk/clk-io.h
> new file mode 100644
> index 0000000..ab65129
> --- /dev/null
> +++ b/drivers/clk/clk-io.h
> @@ -0,0 +1,22 @@
> +/*
> + * linux/drivers/clk/clk-io.h
> + *
> + * Copyright (C) 2015 Matthias Brugger <[email-masked]>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + */
> +#ifndef __LINUX_CLK_IO_H
> +#define __LINUX_CLK_IO_H
> +
> +#include <linux/clk-provider.h>
> +
> +void clk_io_writel(struct clk_hw *hw, void __iomem *reg, struct regmap
> *regmap, +			u32 offset, u32 val);
> +u32 clk_io_readl(struct clk_hw *hw, void __iomem *reg, struct regmap
> *regmap, +			u32 offset);
> +int clk_io_update_bits(struct clk_hw *hw, void __iomem *reg,
> +			struct regmap *regmap, u32 offset, u32 mask, u32 val);
> +
> +#endif
> diff --git a/drivers/clk/clk-mux.c b/drivers/clk/clk-mux.c
> index 6066a01..ec00de1 100644
> --- a/drivers/clk/clk-mux.c
> +++ b/drivers/clk/clk-mux.c
> @@ -17,6 +17,8 @@
>  #include <linux/io.h>
>  #include <linux/err.h>
> 
> +#include "clk-io.h"
> +
>  /*
>   * DOC: basic adjustable multiplexer clock that cannot gate
>   *
> @@ -42,7 +44,9 @@ static u8 clk_mux_get_parent(struct clk_hw *hw)
>  	 * OTOH, pmd_trace_clk_mux_ck uses a separate bit for each clock, so
>  	 * val = 0x4 really means "bit 2, index starts at bit 0"
>  	 */
> -	val = clk_readl(mux->reg) >> mux->shift;
> +	val = clk_io_readl(hw, mux->reg, mux->regmap, mux->offset);
> +
> +	val >>= mux->shift;
>  	val &= mux->mask;
> 
>  	if (mux->table) {
> @@ -71,6 +75,7 @@ static int clk_mux_set_parent(struct clk_hw *hw, u8 index)
> struct clk_mux *mux = to_clk_mux(hw);
>  	u32 val;
>  	unsigned long flags = 0;
> +	int ret = 0;
> 
>  	if (mux->table)
>  		index = mux->table[index];
> @@ -88,17 +93,20 @@ static int clk_mux_set_parent(struct clk_hw *hw, u8
> index)
> 
>  	if (mux->flags & CLK_MUX_HIWORD_MASK) {
>  		val = mux->mask << (mux->shift + 16);
> +		val |= index << mux->shift;
> +		clk_io_writel(hw, mux->reg, mux->regmap, mux->offset, val);
>  	} else {
> -		val = clk_readl(mux->reg);
> -		val &= ~(mux->mask << mux->shift);
> +		u32 mask = mux->mask << mux->shift;
> +
> +		val = index << mux->shift;
> +		ret = clk_io_update_bits(hw, mux->reg, mux->regmap,
> +				mux->offset, mask, val);
>  	}
> -	val |= index << mux->shift;
> -	clk_writel(val, mux->reg);
> 
>  	if (mux->lock)
>  		spin_unlock_irqrestore(mux->lock, flags);
> 
> -	return 0;
> +	return ret;
>  }
> 
>  const struct clk_ops clk_mux_ops = {
> @@ -113,10 +121,11 @@ const struct clk_ops clk_mux_ro_ops = {
>  };
>  EXPORT_SYMBOL_GPL(clk_mux_ro_ops);
> 
> -struct clk *clk_register_mux_table(struct device *dev, const char *name,
> +struct clk *__clk_register_mux_table(struct device *dev, const char *name,
>  		const char * const *parent_names, u8 num_parents,
>  		unsigned long flags,
> -		void __iomem *reg, u8 shift, u32 mask,
> +		void __iomem *reg, struct regmap *regmap,
> +		u32 offset, u8 shift, u32 mask,
>  		u8 clk_mux_flags, u32 *table, spinlock_t *lock)
>  {
>  	struct clk_mux *mux;
> @@ -149,7 +158,12 @@ struct clk *clk_register_mux_table(struct device *dev,
> const char *name, init.num_parents = num_parents;
> 
>  	/* struct clk_mux assignments */
> -	mux->reg = reg;
> +	if (flags & CLK_USE_REGMAP)
> +		mux->regmap = regmap;
> +	else
> +		mux->reg = reg;
> +
> +	mux->offset = offset;
>  	mux->shift = shift;
>  	mux->mask = mask;
>  	mux->flags = clk_mux_flags;
> @@ -164,19 +178,40 @@ struct clk *clk_register_mux_table(struct device *dev,
> const char *name,
> 
>  	return clk;
>  }
> +
> +struct clk *clk_register_mux_table(struct device *dev, const char *name,
> +		const char * const *parent_names, u8 num_parents,
> +		unsigned long flags, void __iomem *reg, u8 shift, u32 mask,
> +		u8 clk_mux_flags, u32 *table, spinlock_t *lock)
> +{
> +	return __clk_register_mux_table(dev, name, parent_names, num_parents,
> +						flags, reg, NULL, 0,
> +						shift, mask, clk_mux_flags,
> +						table, lock);
> +}
>  EXPORT_SYMBOL_GPL(clk_register_mux_table);
> 
> -struct clk *clk_register_mux(struct device *dev, const char *name,
> +struct clk *__clk_register_mux(struct device *dev, const char *name,
>  		const char * const *parent_names, u8 num_parents,
> -		unsigned long flags,
> -		void __iomem *reg, u8 shift, u8 width,
> +		unsigned long flags, void __iomem *reg, struct regmap *regmap,
> +		u32 offset, u8 shift, u8 width,
>  		u8 clk_mux_flags, spinlock_t *lock)
>  {
>  	u32 mask = BIT(width) - 1;
> 
> -	return clk_register_mux_table(dev, name, parent_names, num_parents,
> -				      flags, reg, shift, mask, clk_mux_flags,
> -				      NULL, lock);
> +	return __clk_register_mux_table(dev, name, parent_names, num_parents,
> +					flags, reg, regmap, offset, shift, mask,
> +					clk_mux_flags, NULL, lock);
> +}
> +
> +struct clk *clk_register_mux(struct device *dev, const char *name,
> +		const char * const *parent_names, u8 num_parents,
> +		unsigned long flags, void __iomem *reg, u8 shift, u8 width,
> +		u8 clk_mux_flags, spinlock_t *lock)
> +{
> +	return __clk_register_mux(dev, name, parent_names, num_parents, flags,
> +					reg, NULL, 0, shift, width,
> +					clk_mux_flags, lock);
>  }
>  EXPORT_SYMBOL_GPL(clk_register_mux);
> 
> @@ -195,3 +230,32 @@ void clk_unregister_mux(struct clk *clk)
>  	kfree(mux);
>  }
>  EXPORT_SYMBOL_GPL(clk_unregister_mux);
> +
> +struct clk *clk_regm_register_mux(struct device *dev, const char *name,
> +		const char * const *parent_names, u8 num_parents,
> +		unsigned long flags, struct regmap *regmap,
> +		u32 offset, u8 shift, u8 width,
> +		u8 clk_mux_flags, spinlock_t *lock)
> +{
> +	flags |= CLK_USE_REGMAP;
> +
> +	return __clk_register_mux(dev, name, parent_names, num_parents, flags,
> +					NULL, regmap, offset, shift, width,
> +					clk_mux_flags, lock);
> +}
> +EXPORT_SYMBOL_GPL(clk_regm_register_mux);
> +
> +struct clk *clk_regm_register_mux_table(struct device *dev, const char
> *name, +		const char * const *parent_names, u8 num_parents,
> +		unsigned long flags, struct regmap *regmap,
> +		u32 offset, u8 shift, u32 mask,
> +		u8 clk_mux_flags, u32 *table, spinlock_t *lock)
> +{
> +	flags |= CLK_USE_REGMAP;
> +
> +	return __clk_register_mux_table(dev, name, parent_names, num_parents,
> +					flags, NULL, regmap, offset,
> +					shift, mask, clk_mux_flags,
> +					table, lock);
> +}
> +EXPORT_SYMBOL_GPL(clk_regm_register_mux_table);
> diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
> index 4a943d1..1cb4d6d 100644
> --- a/include/linux/clk-provider.h
> +++ b/include/linux/clk-provider.h
> @@ -14,6 +14,7 @@
>  #include <linux/clk.h>
>  #include <linux/io.h>
>  #include <linux/of.h>
> +#include <linux/regmap.h>
> 
>  #ifdef CONFIG_COMMON_CLK
> 
> @@ -31,6 +32,7 @@
>  #define CLK_GET_RATE_NOCACHE	BIT(6) /* do not use the cached clk rate */
>  #define CLK_SET_RATE_NO_REPARENT BIT(7) /* don't re-parent on rate change
> */ #define CLK_GET_ACCURACY_NOCACHE BIT(8) /* do not use the cached clk
> accuracy */ +#define CLK_USE_REGMAP		BIT(9) /* uses regmap to access
> registers */
> 
>  struct clk_hw;
>  struct clk_core;
> @@ -271,6 +273,8 @@ void of_fixed_clk_setup(struct device_node *np);
>   *
>   * @hw:		handle between common and hardware-specific interfaces
>   * @reg:	register controlling gate
> + * @regmap:	regmap used to control the gate
> + * @offset:	offset inside the regmap
>   * @bit_idx:	single bit controlling gate
>   * @flags:	hardware-specific flags
>   * @lock:	register lock
> @@ -288,7 +292,11 @@ void of_fixed_clk_setup(struct device_node *np);
>   */
>  struct clk_gate {
>  	struct clk_hw hw;
> -	void __iomem	*reg;
> +	union {
> +		void __iomem	*reg;
> +		struct regmap	*regmap;
> +	};
> +	u32		offset;
>  	u8		bit_idx;
>  	u8		flags;
>  	spinlock_t	*lock;
> @@ -304,6 +312,11 @@ struct clk *clk_register_gate(struct device *dev, const
> char *name, u8 clk_gate_flags, spinlock_t *lock);
>  void clk_unregister_gate(struct clk *clk);
> 
> +struct clk *clk_regm_register_gate(struct device *dev, const char *name,
> +		const char *parent_name, unsigned long flags,
> +		struct regmap *regmap, u32 offset, u8 bit_idx,
> +		u8 clk_gate_flags, spinlock_t *lock);
> +
>  struct clk_div_table {
>  	unsigned int	val;
>  	unsigned int	div;
> @@ -314,6 +327,8 @@ struct clk_div_table {
>   *
>   * @hw:		handle between common and hardware-specific interfaces
>   * @reg:	register containing the divider
> + * @regmap:	regmap used to access the divider
> + * @offest:	offset inside the regmap
>   * @shift:	shift to the divider bit field
>   * @width:	width of the divider bit field
>   * @table:	array of value/divider pairs, last entry should have div = 0
> @@ -345,7 +360,11 @@ struct clk_div_table {
>   */
>  struct clk_divider {
>  	struct clk_hw	hw;
> -	void __iomem	*reg;
> +	union {
> +		void __iomem	*reg;
> +		struct regmap	*regmap;
> +	};
> +	u32		offset;
>  	u8		shift;
>  	u8		width;
>  	u8		flags;
> @@ -383,11 +402,24 @@ struct clk *clk_register_divider_table(struct device
> *dev, const char *name, spinlock_t *lock);
>  void clk_unregister_divider(struct clk *clk);
> 
> +struct clk *clk_regm_register_divider(struct device *dev, const char *name,
> +		const char *parent_name, unsigned long flags,
> +		struct regmap *regmap, u32 offset, u8 shift, u8 width,
> +		u8 clk_divider_flags, spinlock_t *lock);
> +
> +struct clk *clk_regm_register_divider_table(struct device *dev,
> +		const char *name, const char *parent_name, unsigned long flags,
> +		struct regmap *regmap, u32 offset, u8 shift, u8 width,
> +		u8 clk_divider_flags, const struct clk_div_table *table,
> +		spinlock_t *lock);
> +
>  /**
>   * struct clk_mux - multiplexer clock
>   *
>   * @hw:		handle between common and hardware-specific interfaces
>   * @reg:	register controlling multiplexer
> + * @regmap:	regmap for controlling multiplexer
> + * @offset:	offset inside the regmap
>   * @shift:	shift to multiplexer bit field
>   * @width:	width of mutliplexer bit field
>   * @flags:	hardware-specific flags
> @@ -408,8 +440,12 @@ void clk_unregister_divider(struct clk *clk);
>   */
>  struct clk_mux {
>  	struct clk_hw	hw;
> -	void __iomem	*reg;
> +	union {
> +		void __iomem	*reg;
> +		struct regmap	*regmap;
> +	};
>  	u32		*table;
> +	u32		offset;
>  	u32		mask;
>  	u8		shift;
>  	u8		flags;
> @@ -439,6 +475,18 @@ struct clk *clk_register_mux_table(struct device *dev,
> const char *name,
> 
>  void clk_unregister_mux(struct clk *clk);
> 
> +struct clk *clk_regm_register_mux_table(struct device *dev, const char
> *name, +		const char * const *parent_names, u8 num_parents,
> +		unsigned long flags, struct regmap *regmap,
> +		u32 offset, u8 shift, u32 mask,
> +		u8 clk_mux_flags, u32 *table, spinlock_t *lock);
> +
> +struct clk *clk_regm_register_mux(struct device *dev, const char *name,
> +		const char * const *parent_names, u8 num_parents,
> +		unsigned long flags, struct regmap *regmap,
> +		u32 offset, u8 shift, u8 width,
> +		u8 clk_mux_flags, spinlock_t *lock);
> +
>  void of_fixed_factor_clk_setup(struct device_node *node);
> 
>  /**