[PATCH v3 1/3] clk: Add regmap support

Matthias Brugger matthias.bgg at gmail.com
Tue Jun 9 08:38:01 PDT 2015


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 <matthias.bgg at gmail.com>
---
 drivers/clk/Makefile         |   1 +
 drivers/clk/clk-divider.c    |  71 ++++++++++++++++++++------
 drivers/clk/clk-gate.c       |  60 +++++++++++++++++-----
 drivers/clk/clk-io.c         |  62 +++++++++++++++++++++++
 drivers/clk/clk-io.h         |  13 +++++
 drivers/clk/clk-mux.c        |  94 +++++++++++++++++++++++++++++------
 include/linux/clk-provider.h | 115 +++++++++++++++++++++++++++++++++++++++++--
 7 files changed, 373 insertions(+), 43 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..99f04ea 100644
--- a/drivers/clk/clk-divider.c
+++ b/drivers/clk/clk-divider.c
@@ -18,6 +18,7 @@
 #include <linux/string.h>
 #include <linux/log2.h>
 
+#include "clk-io.h"
 /*
  * DOC: basic adjustable divider clock that cannot gate
  *
@@ -137,7 +138,8 @@ 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 +351,10 @@ 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 +397,16 @@ 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 +423,9 @@ 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 +450,12 @@ 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 +489,8 @@ 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 +514,8 @@ 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 +534,32 @@ void clk_unregister_divider(struct clk *clk)
 	kfree(div);
 }
 EXPORT_SYMBOL_GPL(clk_unregister_divider);
+
+#ifdef CONFIG_REGMAP
+
+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);
+
+#endif
diff --git a/drivers/clk/clk-gate.c b/drivers/clk/clk-gate.c
index 551dd06..2a6b696 100644
--- a/drivers/clk/clk-gate.c
+++ b/drivers/clk/clk-gate.c
@@ -16,6 +16,7 @@
 #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 +47,7 @@ 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 +58,21 @@ 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 +95,7 @@ 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 +124,10 @@ 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 +152,12 @@ 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 +170,15 @@ 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 +196,19 @@ void clk_unregister_gate(struct clk *clk)
 	kfree(gate);
 }
 EXPORT_SYMBOL_GPL(clk_unregister_gate);
+
+#ifdef CONFIG_REGMAP
+
+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);
+
+#endif
diff --git a/drivers/clk/clk-io.c b/drivers/clk/clk-io.c
new file mode 100644
index 0000000..14644af
--- /dev/null
+++ b/drivers/clk/clk-io.c
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2015 Matthias Brugger <matthias.bgg at gmail.com>
+ *
+ * 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)
+{
+	int ret;
+
+	if (hw->init && (hw->init->flags & CLK_USE_REGMAP)) {
+		ret = regmap_write(regmap, offset, val);
+		WARN((ret != 0),
+			"%s: Error accessing regmap\n",
+			__clk_get_name(hw->clk));
+	} else {
+		clk_writel(val, reg);
+	}
+}
+
+u32 clk_io_readl(struct clk_hw *hw, void __iomem *reg, struct regmap *regmap,
+			u32 offset)
+{
+	u32 val;
+	int ret;
+
+	if (hw->init && (hw->init->flags & CLK_USE_REGMAP)) {
+		ret = regmap_read(regmap, offset, &val);
+		WARN((ret != 0),
+			"%s: Error accessing regmap\n",
+			__clk_get_name(hw->clk));
+	} else {
+		val = clk_readl(reg);
+	}
+
+	return val;
+}
+
+void clk_io_update_bits(struct clk_hw *hw, void __iomem *reg,
+			struct regmap *regmap, u32 offset, u32 mask, u32 val)
+{
+	unsigned int tmp;
+	int ret;
+
+	if (hw->init && (hw->init->flags & CLK_USE_REGMAP)) {
+		ret = regmap_update_bits(regmap, offset, mask, val);
+		WARN((ret != 0),
+			"%s: Error accessing regmap\n",
+			__clk_get_name(hw->clk));
+	} else {
+		tmp = clk_readl(reg);
+		tmp &= ~mask;
+		tmp |= val;
+		clk_writel(tmp, reg);
+	}
+}
diff --git a/drivers/clk/clk-io.h b/drivers/clk/clk-io.h
new file mode 100644
index 0000000..8b305fd
--- /dev/null
+++ b/drivers/clk/clk-io.h
@@ -0,0 +1,13 @@
+#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);
+void 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..12fa2d0 100644
--- a/drivers/clk/clk-mux.c
+++ b/drivers/clk/clk-mux.c
@@ -17,6 +17,7 @@
 #include <linux/io.h>
 #include <linux/err.h>
 
+#include "clk-io.h"
 /*
  * DOC: basic adjustable multiplexer clock that cannot gate
  *
@@ -42,7 +43,9 @@ 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) {
@@ -88,12 +91,15 @@ 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;
+		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);
@@ -113,10 +119,11 @@ 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 +156,12 @@ 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 +176,40 @@ 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 +228,36 @@ void clk_unregister_mux(struct clk *clk)
 	kfree(mux);
 }
 EXPORT_SYMBOL_GPL(clk_unregister_mux);
+
+#ifdef CONFIG_REGMAP
+
+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);
+
+#endif
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index 2e5df06..22acfd5 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) /* clock uses regmap to access its 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 +312,25 @@ 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);
 
+# ifdef CONFIG_REGMAP
+
+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);
+
+#else
+
+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)
+{
+	return NULL;
+}
+
+#endif
+
 struct clk_div_table {
 	unsigned int	val;
 	unsigned int	div;
@@ -314,6 +341,8 @@ 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 +374,11 @@ 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 +416,47 @@ struct clk *clk_register_divider_table(struct device *dev, const char *name,
 		spinlock_t *lock);
 void clk_unregister_divider(struct clk *clk);
 
+#ifdef CONFIG_REGMAP
+
+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);
+
+#else
+
+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)
+{
+	return NULL;
+}
+
+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)
+{
+	return NULL;
+}
+
+#endif
+
 /**
  * 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 +477,12 @@ 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 +512,42 @@ struct clk *clk_register_mux_table(struct device *dev, const char *name,
 
 void clk_unregister_mux(struct clk *clk);
 
+#ifdef CONFIG_REGMAP
+
+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);
+
+#else
+
+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 *reg,
+		u32 offset, u8 shift, u32 mask,
+		u8 clk_mux_flags, u32 *table, spinlock_t *lock)
+{
+	return NULL;
+}
+
+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 *reg,
+		u32 offset, u8 shift, u8 width,
+		u8 clk_mux_flags, spinlock_t *lock)
+{
+	return NULL;
+}
+
+#endif
+
 void of_fixed_factor_clk_setup(struct device_node *node);
 
 /**
-- 
1.9.1




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