Fixed MTP to work with TWRP

drivers/clk/st/Makefile

@@ -0,0 +1 @@
+obj-y += clkgen-mux.o clkgen-pll.o clkgen-fsyn.o clk-flexgen.o

drivers/clk/st/clk-flexgen.c

@@ -0,0 +1,331 @@
+/*
+ * clk-flexgen.c
+ *
+ * Copyright (C) ST-Microelectronics SA 2013
+ * Author:  Maxime Coquelin <maxime.coquelin@st.com> for ST-Microelectronics.
+ * License terms:  GNU General Public License (GPL), version 2  */
+
+#include <linux/clk-provider.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/io.h>
+#include <linux/err.h>
+#include <linux/string.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+
+struct flexgen {
+	struct clk_hw hw;
+
+	/* Crossbar */
+	struct clk_mux mux;
+	/* Pre-divisor's gate */
+	struct clk_gate pgate;
+	/* Pre-divisor */
+	struct clk_divider pdiv;
+	/* Final divisor's gate */
+	struct clk_gate fgate;
+	/* Final divisor */
+	struct clk_divider fdiv;
+};
+
+#define to_flexgen(_hw) container_of(_hw, struct flexgen, hw)
+
+static int flexgen_enable(struct clk_hw *hw)
+{
+	struct flexgen *flexgen = to_flexgen(hw);
+	struct clk_hw *pgate_hw = &flexgen->pgate.hw;
+	struct clk_hw *fgate_hw = &flexgen->fgate.hw;
+
+	pgate_hw->clk = hw->clk;
+	fgate_hw->clk = hw->clk;
+
+	clk_gate_ops.enable(pgate_hw);
+
+	clk_gate_ops.enable(fgate_hw);
+
+	pr_debug("%s: flexgen output enabled\n", __clk_get_name(hw->clk));
+	return 0;
+}
+
+static void flexgen_disable(struct clk_hw *hw)
+{
+	struct flexgen *flexgen = to_flexgen(hw);
+	struct clk_hw *fgate_hw = &flexgen->fgate.hw;
+
+	/* disable only the final gate */
+	fgate_hw->clk = hw->clk;
+
+	clk_gate_ops.disable(fgate_hw);
+
+	pr_debug("%s: flexgen output disabled\n", __clk_get_name(hw->clk));
+}
+
+static int flexgen_is_enabled(struct clk_hw *hw)
+{
+	struct flexgen *flexgen = to_flexgen(hw);
+	struct clk_hw *fgate_hw = &flexgen->fgate.hw;
+
+	fgate_hw->clk = hw->clk;
+
+	if (!clk_gate_ops.is_enabled(fgate_hw))
+		return 0;
+
+	return 1;
+}
+
+static u8 flexgen_get_parent(struct clk_hw *hw)
+{
+	struct flexgen *flexgen = to_flexgen(hw);
+	struct clk_hw *mux_hw = &flexgen->mux.hw;
+
+	mux_hw->clk = hw->clk;
+
+	return clk_mux_ops.get_parent(mux_hw);
+}
+
+static int flexgen_set_parent(struct clk_hw *hw, u8 index)
+{
+	struct flexgen *flexgen = to_flexgen(hw);
+	struct clk_hw *mux_hw = &flexgen->mux.hw;
+
+	mux_hw->clk = hw->clk;
+
+	return clk_mux_ops.set_parent(mux_hw, index);
+}
+
+static inline unsigned long
+clk_best_div(unsigned long parent_rate, unsigned long rate)
+{
+	return parent_rate / rate + ((rate > (2*(parent_rate % rate))) ? 0 : 1);
+}
+
+static long flexgen_round_rate(struct clk_hw *hw, unsigned long rate,
+				   unsigned long *prate)
+{
+	unsigned long div;
+
+	/* Round div according to exact prate and wished rate */
+	div = clk_best_div(*prate, rate);
+
+	if (__clk_get_flags(hw->clk) & CLK_SET_RATE_PARENT) {
+		*prate = rate * div;
+		return rate;
+	}
+
+	return *prate / div;
+}
+
+unsigned long flexgen_recalc_rate(struct clk_hw *hw,
+		unsigned long parent_rate)
+{
+	struct flexgen *flexgen = to_flexgen(hw);
+	struct clk_hw *pdiv_hw = &flexgen->pdiv.hw;
+	struct clk_hw *fdiv_hw = &flexgen->fdiv.hw;
+	unsigned long mid_rate;
+
+	pdiv_hw->clk = hw->clk;
+	fdiv_hw->clk = hw->clk;
+
+	mid_rate = clk_divider_ops.recalc_rate(pdiv_hw, parent_rate);
+
+	return clk_divider_ops.recalc_rate(fdiv_hw, mid_rate);
+}
+
+static int flexgen_set_rate(struct clk_hw *hw, unsigned long rate,
+				unsigned long parent_rate)
+{
+	struct flexgen *flexgen = to_flexgen(hw);
+	struct clk_hw *pdiv_hw = &flexgen->pdiv.hw;
+	struct clk_hw *fdiv_hw = &flexgen->fdiv.hw;
+	unsigned long primary_div = 0;
+	int ret = 0;
+
+	pdiv_hw->clk = hw->clk;
+	fdiv_hw->clk = hw->clk;
+
+	primary_div = clk_best_div(parent_rate, rate);
+
+	clk_divider_ops.set_rate(fdiv_hw, parent_rate, parent_rate);
+	ret = clk_divider_ops.set_rate(pdiv_hw, rate, rate * primary_div);
+
+	return ret;
+}
+
+static const struct clk_ops flexgen_ops = {
+	.enable = flexgen_enable,
+	.disable = flexgen_disable,
+	.is_enabled = flexgen_is_enabled,
+	.get_parent = flexgen_get_parent,
+	.set_parent = flexgen_set_parent,
+	.round_rate = flexgen_round_rate,
+	.recalc_rate = flexgen_recalc_rate,
+	.set_rate = flexgen_set_rate,
+};
+
+struct clk *clk_register_flexgen(const char *name,
+				const char **parent_names, u8 num_parents,
+				void __iomem *reg, spinlock_t *lock, u32 idx,
+				unsigned long flexgen_flags) {
+	struct flexgen *fgxbar;
+	struct clk *clk;
+	struct clk_init_data init;
+	u32  xbar_shift;
+	void __iomem *xbar_reg, *fdiv_reg;
+
+	fgxbar = kzalloc(sizeof(struct flexgen), GFP_KERNEL);
+	if (!fgxbar)
+		return ERR_PTR(-ENOMEM);
+
+	init.name = name;
+	init.ops = &flexgen_ops;
+	init.flags = CLK_IS_BASIC | flexgen_flags;
+	init.parent_names = parent_names;
+	init.num_parents = num_parents;
+
+	xbar_reg = reg + 0x18 + (idx & ~0x3);
+	xbar_shift = (idx % 4) * 0x8;
+	fdiv_reg = reg + 0x164 + idx * 4;
+
+	/* Crossbar element config */
+	fgxbar->mux.lock = lock;
+	fgxbar->mux.mask = BIT(6) - 1;
+	fgxbar->mux.reg = xbar_reg;
+	fgxbar->mux.shift = xbar_shift;
+	fgxbar->mux.table = NULL;
+
+
+	/* Pre-divider's gate config (in xbar register)*/
+	fgxbar->pgate.lock = lock;
+	fgxbar->pgate.reg = xbar_reg;
+	fgxbar->pgate.bit_idx = xbar_shift + 6;
+
+	/* Pre-divider config */
+	fgxbar->pdiv.lock = lock;
+	fgxbar->pdiv.reg = reg + 0x58 + idx * 4;
+	fgxbar->pdiv.width = 10;
+
+	/* Final divider's gate config */
+	fgxbar->fgate.lock = lock;
+	fgxbar->fgate.reg = fdiv_reg;
+	fgxbar->fgate.bit_idx = 6;
+
+	/* Final divider config */
+	fgxbar->fdiv.lock = lock;
+	fgxbar->fdiv.reg = fdiv_reg;
+	fgxbar->fdiv.width = 6;
+
+	fgxbar->hw.init = &init;
+
+	clk = clk_register(NULL, &fgxbar->hw);
+	if (IS_ERR(clk))
+		kfree(fgxbar);
+	else
+		pr_debug("%s: parent %s rate %u\n",
+			__clk_get_name(clk),
+			__clk_get_name(clk_get_parent(clk)),
+			(unsigned int)clk_get_rate(clk));
+	return clk;
+}
+
+static const char ** __init flexgen_get_parents(struct device_node *np,
+						       int *num_parents)
+{
+	const char **parents;
+	int nparents, i;
+
+	nparents = of_count_phandle_with_args(np, "clocks", "#clock-cells");
+	if (WARN_ON(nparents <= 0))
+		return NULL;
+
+	parents = kcalloc(nparents, sizeof(const char *), GFP_KERNEL);
+	if (!parents)
+		return NULL;
+
+	for (i = 0; i < nparents; i++)
+		parents[i] = of_clk_get_parent_name(np, i);
+
+	*num_parents = nparents;
+	return parents;
+}
+
+void __init st_of_flexgen_setup(struct device_node *np)
+{
+	struct device_node *pnode;
+	void __iomem *reg;
+	struct clk_onecell_data *clk_data;
+	const char **parents;
+	int num_parents, i;
+	spinlock_t *rlock = NULL;
+	unsigned long flex_flags = 0;
+
+	pnode = of_get_parent(np);
+	if (!pnode)
+		return;
+
+	reg = of_iomap(pnode, 0);
+	if (!reg)
+		return;
+
+	parents = flexgen_get_parents(np, &num_parents);
+	if (!parents)
+		return;
+
+	clk_data = kzalloc(sizeof(*clk_data), GFP_KERNEL);
+	if (!clk_data)
+		goto err;
+
+	clk_data->clk_num = of_property_count_strings(np ,
+			"clock-output-names");
+	if (clk_data->clk_num <= 0) {
+		pr_err("%s: Failed to get number of output clocks (%d)",
+				__func__, clk_data->clk_num);
+		goto err;
+	}
+
+	clk_data->clks = kcalloc(clk_data->clk_num, sizeof(struct clk *),
+			GFP_KERNEL);
+	if (!clk_data->clks)
+		goto err;
+
+	rlock = kzalloc(sizeof(spinlock_t), GFP_KERNEL);
+	if (!rlock)
+		goto err;
+
+	for (i = 0; i < clk_data->clk_num; i++) {
+		struct clk *clk;
+		const char *clk_name;
+
+		if (of_property_read_string_index(np, "clock-output-names",
+						  i, &clk_name)) {
+			break;
+		}
+
+		/*
+		 * If we read an empty clock name then the output is unused
+		 */
+		if (*clk_name == '\0')
+			continue;
+
+		clk = clk_register_flexgen(clk_name, parents, num_parents,
+					   reg, rlock, i, flex_flags);
+
+		if (IS_ERR(clk))
+			goto err;
+
+		clk_data->clks[i] = clk;
+	}
+
+	kfree(parents);
+	of_clk_add_provider(np, of_clk_src_onecell_get, clk_data);
+
+	return;
+
+err:
+	if (clk_data)
+		kfree(clk_data->clks);
+	kfree(clk_data);
+	kfree(parents);
+	kfree(rlock);
+}
+CLK_OF_DECLARE(flexgen, "st,flexgen", st_of_flexgen_setup);

drivers/clk/st/clkgen-mux.c

@@ -0,0 +1,830 @@
+/*
+ * clkgen-mux.c: ST GEN-MUX Clock driver
+ *
+ * Copyright (C) 2014 STMicroelectronics (R&D) Limited
+ *
+ * Authors: Stephen Gallimore <stephen.gallimore@st.com>
+ *	    Pankaj Dev <pankaj.dev@st.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+
+#include <linux/slab.h>
+#include <linux/of_address.h>
+#include <linux/clk-provider.h>
+
+static DEFINE_SPINLOCK(clkgena_divmux_lock);
+static DEFINE_SPINLOCK(clkgenf_lock);
+
+static const char ** __init clkgen_mux_get_parents(struct device_node *np,
+						       int *num_parents)
+{
+	const char **parents;
+	int nparents, i;
+
+	nparents = of_count_phandle_with_args(np, "clocks", "#clock-cells");
+	if (WARN_ON(nparents <= 0))
+		return ERR_PTR(-EINVAL);
+
+	parents = kzalloc(nparents * sizeof(const char *), GFP_KERNEL);
+	if (!parents)
+		return ERR_PTR(-ENOMEM);
+
+	for (i = 0; i < nparents; i++)
+		parents[i] = of_clk_get_parent_name(np, i);
+
+	*num_parents = nparents;
+	return parents;
+}
+
+/**
+ * DOC: Clock mux with a programmable divider on each of its three inputs.
+ *      The mux has an input setting which effectively gates its output.
+ *
+ * Traits of this clock:
+ * prepare - clk_(un)prepare only ensures parent is (un)prepared
+ * enable - clk_enable and clk_disable are functional & control gating
+ * rate - set rate is supported
+ * parent - set/get parent
+ */
+
+#define NUM_INPUTS 3
+
+struct clkgena_divmux {
+	struct clk_hw hw;
+	/* Subclassed mux and divider structures */
+	struct clk_mux mux;
+	struct clk_divider div[NUM_INPUTS];
+	/* Enable/running feedback register bits for each input */
+	void __iomem *feedback_reg[NUM_INPUTS];
+	int feedback_bit_idx;
+
+	u8              muxsel;
+};
+
+#define to_clkgena_divmux(_hw) container_of(_hw, struct clkgena_divmux, hw)
+
+struct clkgena_divmux_data {
+	int num_outputs;
+	int mux_offset;
+	int mux_offset2;
+	int mux_start_bit;
+	int div_offsets[NUM_INPUTS];
+	int fb_offsets[NUM_INPUTS];
+	int fb_start_bit_idx;
+};
+
+#define CKGAX_CLKOPSRC_SWITCH_OFF 0x3
+
+static int clkgena_divmux_is_running(struct clkgena_divmux *mux)
+{
+	u32 regval = readl(mux->feedback_reg[mux->muxsel]);
+	u32 running = regval & BIT(mux->feedback_bit_idx);
+	return !!running;
+}
+
+static int clkgena_divmux_enable(struct clk_hw *hw)
+{
+	struct clkgena_divmux *genamux = to_clkgena_divmux(hw);
+	struct clk_hw *mux_hw = &genamux->mux.hw;
+	unsigned long timeout;
+	int ret = 0;
+
+	mux_hw->clk = hw->clk;
+
+	ret = clk_mux_ops.set_parent(mux_hw, genamux->muxsel);
+	if (ret)
+		return ret;
+
+	timeout = jiffies + msecs_to_jiffies(10);
+
+	while (!clkgena_divmux_is_running(genamux)) {
+		if (time_after(jiffies, timeout))
+			return -ETIMEDOUT;
+		cpu_relax();
+	}
+
+	return 0;
+}
+
+static void clkgena_divmux_disable(struct clk_hw *hw)
+{
+	struct clkgena_divmux *genamux = to_clkgena_divmux(hw);
+	struct clk_hw *mux_hw = &genamux->mux.hw;
+
+	mux_hw->clk = hw->clk;
+
+	clk_mux_ops.set_parent(mux_hw, CKGAX_CLKOPSRC_SWITCH_OFF);
+}
+
+static int clkgena_divmux_is_enabled(struct clk_hw *hw)
+{
+	struct clkgena_divmux *genamux = to_clkgena_divmux(hw);
+	struct clk_hw *mux_hw = &genamux->mux.hw;
+
+	mux_hw->clk = hw->clk;
+
+	return (s8)clk_mux_ops.get_parent(mux_hw) > 0;
+}
+
+u8 clkgena_divmux_get_parent(struct clk_hw *hw)
+{
+	struct clkgena_divmux *genamux = to_clkgena_divmux(hw);
+	struct clk_hw *mux_hw = &genamux->mux.hw;
+
+	mux_hw->clk = hw->clk;
+
+	genamux->muxsel = clk_mux_ops.get_parent(mux_hw);
+	if ((s8)genamux->muxsel < 0) {
+		pr_debug("%s: %s: Invalid parent, setting to default.\n",
+		      __func__, __clk_get_name(hw->clk));
+		genamux->muxsel = 0;
+	}
+
+	return genamux->muxsel;
+}
+
+static int clkgena_divmux_set_parent(struct clk_hw *hw, u8 index)
+{
+	struct clkgena_divmux *genamux = to_clkgena_divmux(hw);
+
+	if (index >= CKGAX_CLKOPSRC_SWITCH_OFF)
+		return -EINVAL;
+
+	genamux->muxsel = index;
+
+	/*
+	 * If the mux is already enabled, call enable directly to set the
+	 * new mux position and wait for it to start running again. Otherwise
+	 * do nothing.
+	 */
+	if (clkgena_divmux_is_enabled(hw))
+		clkgena_divmux_enable(hw);
+
+	return 0;
+}
+
+unsigned long clkgena_divmux_recalc_rate(struct clk_hw *hw,
+		unsigned long parent_rate)
+{
+	struct clkgena_divmux *genamux = to_clkgena_divmux(hw);
+	struct clk_hw *div_hw = &genamux->div[genamux->muxsel].hw;
+
+	div_hw->clk = hw->clk;
+
+	return clk_divider_ops.recalc_rate(div_hw, parent_rate);
+}
+
+static int clkgena_divmux_set_rate(struct clk_hw *hw, unsigned long rate,
+				unsigned long parent_rate)
+{
+	struct clkgena_divmux *genamux = to_clkgena_divmux(hw);
+	struct clk_hw *div_hw = &genamux->div[genamux->muxsel].hw;
+
+	div_hw->clk = hw->clk;
+
+	return clk_divider_ops.set_rate(div_hw, rate, parent_rate);
+}
+
+static long clkgena_divmux_round_rate(struct clk_hw *hw, unsigned long rate,
+				   unsigned long *prate)
+{
+	struct clkgena_divmux *genamux = to_clkgena_divmux(hw);
+	struct clk_hw *div_hw = &genamux->div[genamux->muxsel].hw;
+
+	div_hw->clk = hw->clk;
+
+	return clk_divider_ops.round_rate(div_hw, rate, prate);
+}
+
+static const struct clk_ops clkgena_divmux_ops = {
+	.enable = clkgena_divmux_enable,
+	.disable = clkgena_divmux_disable,
+	.is_enabled = clkgena_divmux_is_enabled,
+	.get_parent = clkgena_divmux_get_parent,
+	.set_parent = clkgena_divmux_set_parent,
+	.round_rate = clkgena_divmux_round_rate,
+	.recalc_rate = clkgena_divmux_recalc_rate,
+	.set_rate = clkgena_divmux_set_rate,
+};
+
+/**
+ * clk_register_genamux - register a genamux clock with the clock framework
+ */
+struct clk *clk_register_genamux(const char *name,
+				const char **parent_names, u8 num_parents,
+				void __iomem *reg,
+				const struct clkgena_divmux_data *muxdata,
+				u32 idx)
+{
+	/*
+	 * Fixed constants across all ClockgenA variants
+	 */
+	const int mux_width = 2;
+	const int divider_width = 5;
+	struct clkgena_divmux *genamux;
+	struct clk *clk;
+	struct clk_init_data init;
+	int i;
+
+	genamux = kzalloc(sizeof(*genamux), GFP_KERNEL);
+	if (!genamux)
+		return ERR_PTR(-ENOMEM);
+
+	init.name = name;
+	init.ops = &clkgena_divmux_ops;
+	init.flags = CLK_IS_BASIC;
+	init.parent_names = parent_names;
+	init.num_parents = num_parents;
+
+	genamux->mux.lock  = &clkgena_divmux_lock;
+	genamux->mux.mask = BIT(mux_width) - 1;
+	genamux->mux.shift = muxdata->mux_start_bit + (idx * mux_width);
+	if (genamux->mux.shift > 31) {
+		/*
+		 * We have spilled into the second mux register so
+		 * adjust the register address and the bit shift accordingly
+		 */
+		genamux->mux.reg = reg + muxdata->mux_offset2;
+		genamux->mux.shift -= 32;
+	} else {
+		genamux->mux.reg   = reg + muxdata->mux_offset;
+	}
+
+	for (i = 0; i < NUM_INPUTS; i++) {
+		/*
+		 * Divider config for each input
+		 */
+		void __iomem *divbase = reg + muxdata->div_offsets[i];
+		genamux->div[i].width = divider_width;
+		genamux->div[i].reg = divbase + (idx * sizeof(u32));
+
+		/*
+		 * Mux enabled/running feedback register for each input.
+		 */
+		genamux->feedback_reg[i] = reg + muxdata->fb_offsets[i];
+	}
+
+	genamux->feedback_bit_idx = muxdata->fb_start_bit_idx + idx;
+	genamux->hw.init = &init;
+
+	clk = clk_register(NULL, &genamux->hw);
+	if (IS_ERR(clk)) {
+		kfree(genamux);
+		goto err;
+	}
+
+	pr_debug("%s: parent %s rate %lu\n",
+			__clk_get_name(clk),
+			__clk_get_name(clk_get_parent(clk)),
+			clk_get_rate(clk));
+err:
+	return clk;
+}
+
+static struct clkgena_divmux_data st_divmux_c65hs = {
+	.num_outputs = 4,
+	.mux_offset = 0x14,
+	.mux_start_bit = 0,
+	.div_offsets = { 0x800, 0x900, 0xb00 },
+	.fb_offsets = { 0x18, 0x1c, 0x20 },
+	.fb_start_bit_idx = 0,
+};
+
+static struct clkgena_divmux_data st_divmux_c65ls = {
+	.num_outputs = 14,
+	.mux_offset = 0x14,
+	.mux_offset2 = 0x24,
+	.mux_start_bit = 8,
+	.div_offsets = { 0x810, 0xa10, 0xb10 },
+	.fb_offsets = { 0x18, 0x1c, 0x20 },
+	.fb_start_bit_idx = 4,
+};
+
+static struct clkgena_divmux_data st_divmux_c32odf0 = {
+	.num_outputs = 8,
+	.mux_offset = 0x1c,
+	.mux_start_bit = 0,
+	.div_offsets = { 0x800, 0x900, 0xa60 },
+	.fb_offsets = { 0x2c, 0x24, 0x28 },
+	.fb_start_bit_idx = 0,
+};
+
+static struct clkgena_divmux_data st_divmux_c32odf1 = {
+	.num_outputs = 8,
+	.mux_offset = 0x1c,
+	.mux_start_bit = 16,
+	.div_offsets = { 0x820, 0x980, 0xa80 },
+	.fb_offsets = { 0x2c, 0x24, 0x28 },
+	.fb_start_bit_idx = 8,
+};
+
+static struct clkgena_divmux_data st_divmux_c32odf2 = {
+	.num_outputs = 8,
+	.mux_offset = 0x20,
+	.mux_start_bit = 0,
+	.div_offsets = { 0x840, 0xa20, 0xb10 },
+	.fb_offsets = { 0x2c, 0x24, 0x28 },
+	.fb_start_bit_idx = 16,
+};
+
+static struct clkgena_divmux_data st_divmux_c32odf3 = {
+	.num_outputs = 8,
+	.mux_offset = 0x20,
+	.mux_start_bit = 16,
+	.div_offsets = { 0x860, 0xa40, 0xb30 },
+	.fb_offsets = { 0x2c, 0x24, 0x28 },
+	.fb_start_bit_idx = 24,
+};
+
+static struct of_device_id clkgena_divmux_of_match[] = {
+	{
+		.compatible = "st,clkgena-divmux-c65-hs",
+		.data = &st_divmux_c65hs,
+	},
+	{
+		.compatible = "st,clkgena-divmux-c65-ls",
+		.data = &st_divmux_c65ls,
+	},
+	{
+		.compatible = "st,clkgena-divmux-c32-odf0",
+		.data = &st_divmux_c32odf0,
+	},
+	{
+		.compatible = "st,clkgena-divmux-c32-odf1",
+		.data = &st_divmux_c32odf1,
+	},
+	{
+		.compatible = "st,clkgena-divmux-c32-odf2",
+		.data = &st_divmux_c32odf2,
+	},
+	{
+		.compatible = "st,clkgena-divmux-c32-odf3",
+		.data = &st_divmux_c32odf3,
+	},
+	{}
+};
+
+static void __iomem * __init clkgen_get_register_base(
+				struct device_node *np)
+{
+	struct device_node *pnode;
+	void __iomem *reg = NULL;
+
+	pnode = of_get_parent(np);
+	if (!pnode)
+		return NULL;
+
+	reg = of_iomap(pnode, 0);
+
+	of_node_put(pnode);
+	return reg;
+}
+
+void __init st_of_clkgena_divmux_setup(struct device_node *np)
+{
+	const struct of_device_id *match;
+	const struct clkgena_divmux_data *data;
+	struct clk_onecell_data *clk_data;
+	void __iomem *reg;
+	const char **parents;
+	int num_parents = 0, i;
+
+	match = of_match_node(clkgena_divmux_of_match, np);
+	if (WARN_ON(!match))
+		return;
+
+	data = (struct clkgena_divmux_data *)match->data;
+
+	reg = clkgen_get_register_base(np);
+	if (!reg)
+		return;
+
+	parents = clkgen_mux_get_parents(np, &num_parents);
+	if (IS_ERR(parents))
+		return;
+
+	clk_data = kzalloc(sizeof(*clk_data), GFP_KERNEL);
+	if (!clk_data)
+		goto err;
+
+	clk_data->clk_num = data->num_outputs;
+	clk_data->clks = kzalloc(clk_data->clk_num * sizeof(struct clk *),
+				 GFP_KERNEL);
+
+	if (!clk_data->clks)
+		goto err;
+
+	for (i = 0; i < clk_data->clk_num; i++) {
+		struct clk *clk;
+		const char *clk_name;
+
+		if (of_property_read_string_index(np, "clock-output-names",
+						  i, &clk_name))
+			break;
+
+		/*
+		 * If we read an empty clock name then the output is unused
+		 */
+		if (*clk_name == '\0')
+			continue;
+
+		clk = clk_register_genamux(clk_name, parents, num_parents,
+					   reg, data, i);
+
+		if (IS_ERR(clk))
+			goto err;
+
+		clk_data->clks[i] = clk;
+	}
+
+	kfree(parents);
+
+	of_clk_add_provider(np, of_clk_src_onecell_get, clk_data);
+	return;
+err:
+	if (clk_data)
+		kfree(clk_data->clks);
+
+	kfree(clk_data);
+	kfree(parents);
+}
+CLK_OF_DECLARE(clkgenadivmux, "st,clkgena-divmux", st_of_clkgena_divmux_setup);
+
+struct clkgena_prediv_data {
+	u32 offset;
+	u8 shift;
+	struct clk_div_table *table;
+};
+
+static struct clk_div_table prediv_table16[] = {
+	{ .val = 0, .div = 1 },
+	{ .val = 1, .div = 16 },
+	{ .div = 0 },
+};
+
+static struct clkgena_prediv_data prediv_c65_data = {
+	.offset = 0x4c,
+	.shift = 31,
+	.table = prediv_table16,
+};
+
+static struct clkgena_prediv_data prediv_c32_data = {
+	.offset = 0x50,
+	.shift = 1,
+	.table = prediv_table16,
+};
+
+static struct of_device_id clkgena_prediv_of_match[] = {
+	{ .compatible = "st,clkgena-prediv-c65", .data = &prediv_c65_data },
+	{ .compatible = "st,clkgena-prediv-c32", .data = &prediv_c32_data },
+	{}
+};
+
+void __init st_of_clkgena_prediv_setup(struct device_node *np)
+{
+	const struct of_device_id *match;
+	void __iomem *reg;
+	const char *parent_name, *clk_name;
+	struct clk *clk;
+	struct clkgena_prediv_data *data;
+
+	match = of_match_node(clkgena_prediv_of_match, np);
+	if (!match) {
+		pr_err("%s: No matching data\n", __func__);
+		return;
+	}
+
+	data = (struct clkgena_prediv_data *)match->data;
+
+	reg = clkgen_get_register_base(np);
+	if (!reg)
+		return;
+
+	parent_name = of_clk_get_parent_name(np, 0);
+	if (!parent_name)
+		return;
+
+	if (of_property_read_string_index(np, "clock-output-names",
+					  0, &clk_name))
+		return;
+
+	clk = clk_register_divider_table(NULL, clk_name, parent_name, 0,
+					 reg + data->offset, data->shift, 1,
+					 0, data->table, NULL);
+	if (IS_ERR(clk))
+		return;
+
+	of_clk_add_provider(np, of_clk_src_simple_get, clk);
+	pr_debug("%s: parent %s rate %u\n",
+		__clk_get_name(clk),
+		__clk_get_name(clk_get_parent(clk)),
+		(unsigned int)clk_get_rate(clk));
+
+	return;
+}
+CLK_OF_DECLARE(clkgenaprediv, "st,clkgena-prediv", st_of_clkgena_prediv_setup);
+
+struct clkgen_mux_data {
+	u32 offset;
+	u8 shift;
+	u8 width;
+	spinlock_t *lock;
+	unsigned long clk_flags;
+	u8 mux_flags;
+};
+
+static struct clkgen_mux_data clkgen_mux_c_vcc_hd_416 = {
+	.offset = 0,
+	.shift = 0,
+	.width = 1,
+};
+
+static struct clkgen_mux_data clkgen_mux_f_vcc_fvdp_416 = {
+	.offset = 0,
+	.shift = 0,
+	.width = 1,
+};
+
+static struct clkgen_mux_data clkgen_mux_f_vcc_hva_416 = {
+	.offset = 0,
+	.shift = 0,
+	.width = 1,
+};
+
+static struct clkgen_mux_data clkgen_mux_f_vcc_hd_416 = {
+	.offset = 0,
+	.shift = 16,
+	.width = 1,
+	.lock = &clkgenf_lock,
+};
+
+static struct clkgen_mux_data clkgen_mux_c_vcc_sd_416 = {
+	.offset = 0,
+	.shift = 17,
+	.width = 1,
+	.lock = &clkgenf_lock,
+};
+
+static struct clkgen_mux_data stih415_a9_mux_data = {
+	.offset = 0,
+	.shift = 1,
+	.width = 2,
+};
+static struct clkgen_mux_data stih416_a9_mux_data = {
+	.offset = 0,
+	.shift = 0,
+	.width = 2,
+};
+static struct clkgen_mux_data stih407_a9_mux_data = {
+	.offset = 0x1a4,
+	.shift = 1,
+	.width = 2,
+};
+
+static struct of_device_id mux_of_match[] = {
+	{
+		.compatible = "st,stih416-clkgenc-vcc-hd",
+		.data = &clkgen_mux_c_vcc_hd_416,
+	},
+	{
+		.compatible = "st,stih416-clkgenf-vcc-fvdp",
+		.data = &clkgen_mux_f_vcc_fvdp_416,
+	},
+	{
+		.compatible = "st,stih416-clkgenf-vcc-hva",
+		.data = &clkgen_mux_f_vcc_hva_416,
+	},
+	{
+		.compatible = "st,stih416-clkgenf-vcc-hd",
+		.data = &clkgen_mux_f_vcc_hd_416,
+	},
+	{
+		.compatible = "st,stih416-clkgenf-vcc-sd",
+		.data = &clkgen_mux_c_vcc_sd_416,
+	},
+	{
+		.compatible = "st,stih415-clkgen-a9-mux",
+		.data = &stih415_a9_mux_data,
+	},
+	{
+		.compatible = "st,stih416-clkgen-a9-mux",
+		.data = &stih416_a9_mux_data,
+	},
+	{
+		.compatible = "st,stih407-clkgen-a9-mux",
+		.data = &stih407_a9_mux_data,
+	},
+	{}
+};
+
+void __init st_of_clkgen_mux_setup(struct device_node *np)
+{
+	const struct of_device_id *match;
+	struct clk *clk;
+	void __iomem *reg;
+	const char **parents;
+	int num_parents;
+	struct clkgen_mux_data *data;
+
+	match = of_match_node(mux_of_match, np);
+	if (!match) {
+		pr_err("%s: No matching data\n", __func__);
+		return;
+	}
+
+	data = (struct clkgen_mux_data *)match->data;
+
+	reg = of_iomap(np, 0);
+	if (!reg) {
+		pr_err("%s: Failed to get base address\n", __func__);
+		return;
+	}
+
+	parents = clkgen_mux_get_parents(np, &num_parents);
+	if (IS_ERR(parents)) {
+		pr_err("%s: Failed to get parents (%ld)\n",
+				__func__, PTR_ERR(parents));
+		return;
+	}
+
+	clk = clk_register_mux(NULL, np->name, parents, num_parents,
+				data->clk_flags | CLK_SET_RATE_PARENT,
+				reg + data->offset,
+				data->shift, data->width, data->mux_flags,
+				data->lock);
+	if (IS_ERR(clk))
+		goto err;
+
+	pr_debug("%s: parent %s rate %u\n",
+			__clk_get_name(clk),
+			__clk_get_name(clk_get_parent(clk)),
+			(unsigned int)clk_get_rate(clk));
+
+	of_clk_add_provider(np, of_clk_src_simple_get, clk);
+
+err:
+	kfree(parents);
+
+	return;
+}
+CLK_OF_DECLARE(clkgen_mux, "st,clkgen-mux", st_of_clkgen_mux_setup);
+
+#define VCC_MAX_CHANNELS 16
+
+#define VCC_GATE_OFFSET 0x0
+#define VCC_MUX_OFFSET 0x4
+#define VCC_DIV_OFFSET 0x8
+
+struct clkgen_vcc_data {
+	spinlock_t *lock;
+	unsigned long clk_flags;
+};
+
+static struct clkgen_vcc_data st_clkgenc_vcc_416 = {
+	.clk_flags = CLK_SET_RATE_PARENT,
+};
+
+static struct clkgen_vcc_data st_clkgenf_vcc_416 = {
+	.lock = &clkgenf_lock,
+};
+
+static struct of_device_id vcc_of_match[] = {
+	{ .compatible = "st,stih416-clkgenc", .data = &st_clkgenc_vcc_416 },
+	{ .compatible = "st,stih416-clkgenf", .data = &st_clkgenf_vcc_416 },
+	{}
+};
+
+void __init st_of_clkgen_vcc_setup(struct device_node *np)
+{
+	const struct of_device_id *match;
+	void __iomem *reg;
+	const char **parents;
+	int num_parents, i;
+	struct clk_onecell_data *clk_data;
+	struct clkgen_vcc_data *data;
+
+	match = of_match_node(vcc_of_match, np);
+	if (WARN_ON(!match))
+		return;
+	data = (struct clkgen_vcc_data *)match->data;
+
+	reg = of_iomap(np, 0);
+	if (!reg)
+		return;
+
+	parents = clkgen_mux_get_parents(np, &num_parents);
+	if (IS_ERR(parents))
+		return;
+
+	clk_data = kzalloc(sizeof(*clk_data), GFP_KERNEL);
+	if (!clk_data)
+		goto err;
+
+	clk_data->clk_num = VCC_MAX_CHANNELS;
+	clk_data->clks = kzalloc(clk_data->clk_num * sizeof(struct clk *),
+				 GFP_KERNEL);
+
+	if (!clk_data->clks)
+		goto err;
+
+	for (i = 0; i < clk_data->clk_num; i++) {
+		struct clk *clk;
+		const char *clk_name;
+		struct clk_gate *gate;
+		struct clk_divider *div;
+		struct clk_mux *mux;
+
+		if (of_property_read_string_index(np, "clock-output-names",
+						  i, &clk_name))
+			break;
+
+		/*
+		 * If we read an empty clock name then the output is unused
+		 */
+		if (*clk_name == '\0')
+			continue;
+
+		gate = kzalloc(sizeof(struct clk_gate), GFP_KERNEL);
+		if (!gate)
+			break;
+
+		div = kzalloc(sizeof(struct clk_divider), GFP_KERNEL);
+		if (!div) {
+			kfree(gate);
+			break;
+		}
+
+		mux = kzalloc(sizeof(struct clk_mux), GFP_KERNEL);
+		if (!mux) {
+			kfree(gate);
+			kfree(div);
+			break;
+		}
+
+		gate->reg = reg + VCC_GATE_OFFSET;
+		gate->bit_idx = i;
+		gate->flags = CLK_GATE_SET_TO_DISABLE;
+		gate->lock = data->lock;
+
+		div->reg = reg + VCC_DIV_OFFSET;
+		div->shift = 2 * i;
+		div->width = 2;
+		div->flags = CLK_DIVIDER_POWER_OF_TWO |
+			CLK_DIVIDER_ROUND_CLOSEST;
+
+		mux->reg = reg + VCC_MUX_OFFSET;
+		mux->shift = 2 * i;
+		mux->mask = 0x3;
+
+		clk = clk_register_composite(NULL, clk_name, parents,
+					     num_parents,
+					     &mux->hw, &clk_mux_ops,
+					     &div->hw, &clk_divider_ops,
+					     &gate->hw, &clk_gate_ops,
+					     data->clk_flags);
+		if (IS_ERR(clk)) {
+			kfree(gate);
+			kfree(div);
+			kfree(mux);
+			goto err;
+		}
+
+		pr_debug("%s: parent %s rate %u\n",
+			__clk_get_name(clk),
+			__clk_get_name(clk_get_parent(clk)),
+			(unsigned int)clk_get_rate(clk));
+
+		clk_data->clks[i] = clk;
+	}
+
+	kfree(parents);
+
+	of_clk_add_provider(np, of_clk_src_onecell_get, clk_data);
+	return;
+
+err:
+	for (i = 0; i < clk_data->clk_num; i++) {
+		struct clk_composite *composite;
+
+		if (!clk_data->clks[i])
+			continue;
+
+		composite = container_of(__clk_get_hw(clk_data->clks[i]),
+					 struct clk_composite, hw);
+		kfree(container_of(composite->gate_hw, struct clk_gate, hw));
+		kfree(container_of(composite->rate_hw, struct clk_divider, hw));
+		kfree(container_of(composite->mux_hw, struct clk_mux, hw));
+	}
+
+	if (clk_data)
+		kfree(clk_data->clks);
+
+	kfree(clk_data);
+	kfree(parents);
+}
+CLK_OF_DECLARE(clkgen_vcc, "st,clkgen-vcc", st_of_clkgen_vcc_setup);

drivers/clk/st/clkgen-pll.c

@@ -0,0 +1,763 @@
+/*
+ * Copyright (C) 2014 STMicroelectronics (R&D) Limited
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+
+/*
+ * Authors:
+ * Stephen Gallimore <stephen.gallimore@st.com>,
+ * Pankaj Dev <pankaj.dev@st.com>.
+ */
+
+#include <linux/slab.h>
+#include <linux/of_address.h>
+#include <linux/clk-provider.h>
+
+#include "clkgen.h"
+
+static DEFINE_SPINLOCK(clkgena_c32_odf_lock);
+
+/*
+ * Common PLL configuration register bits for PLL800 and PLL1600 C65
+ */
+#define C65_MDIV_PLL800_MASK	(0xff)
+#define C65_MDIV_PLL1600_MASK	(0x7)
+#define C65_NDIV_MASK		(0xff)
+#define C65_PDIV_MASK		(0x7)
+
+/*
+ * PLL configuration register bits for PLL3200 C32
+ */
+#define C32_NDIV_MASK (0xff)
+#define C32_IDF_MASK (0x7)
+#define C32_ODF_MASK (0x3f)
+#define C32_LDF_MASK (0x7f)
+
+#define C32_MAX_ODFS (4)
+
+struct clkgen_pll_data {
+	struct clkgen_field pdn_status;
+	struct clkgen_field locked_status;
+	struct clkgen_field mdiv;
+	struct clkgen_field ndiv;
+	struct clkgen_field pdiv;
+	struct clkgen_field idf;
+	struct clkgen_field ldf;
+	unsigned int num_odfs;
+	struct clkgen_field odf[C32_MAX_ODFS];
+	struct clkgen_field odf_gate[C32_MAX_ODFS];
+	const struct clk_ops *ops;
+};
+
+static const struct clk_ops st_pll1600c65_ops;
+static const struct clk_ops st_pll800c65_ops;
+static const struct clk_ops stm_pll3200c32_ops;
+static const struct clk_ops st_pll1200c32_ops;
+
+static const struct clkgen_pll_data st_pll1600c65_ax = {
+	.pdn_status	= CLKGEN_FIELD(0x0, 0x1,			19),
+	.locked_status	= CLKGEN_FIELD(0x0, 0x1,			31),
+	.mdiv		= CLKGEN_FIELD(0x0, C65_MDIV_PLL1600_MASK,	0),
+	.ndiv		= CLKGEN_FIELD(0x0, C65_NDIV_MASK,		8),
+	.ops		= &st_pll1600c65_ops
+};
+
+static const struct clkgen_pll_data st_pll800c65_ax = {
+	.pdn_status	= CLKGEN_FIELD(0x0,	0x1,			19),
+	.locked_status	= CLKGEN_FIELD(0x0,	0x1,			31),
+	.mdiv		= CLKGEN_FIELD(0x0,	C65_MDIV_PLL800_MASK,	0),
+	.ndiv		= CLKGEN_FIELD(0x0,	C65_NDIV_MASK,		8),
+	.pdiv		= CLKGEN_FIELD(0x0,	C65_PDIV_MASK,		16),
+	.ops		= &st_pll800c65_ops
+};
+
+static const struct clkgen_pll_data st_pll3200c32_a1x_0 = {
+	.pdn_status	= CLKGEN_FIELD(0x0,	0x1,			31),
+	.locked_status	= CLKGEN_FIELD(0x4,	0x1,			31),
+	.ndiv		= CLKGEN_FIELD(0x0,	C32_NDIV_MASK,		0x0),
+	.idf		= CLKGEN_FIELD(0x4,	C32_IDF_MASK,		0x0),
+	.num_odfs = 4,
+	.odf =	{	CLKGEN_FIELD(0x54,	C32_ODF_MASK,		4),
+			CLKGEN_FIELD(0x54,	C32_ODF_MASK,		10),
+			CLKGEN_FIELD(0x54,	C32_ODF_MASK,		16),
+			CLKGEN_FIELD(0x54,	C32_ODF_MASK,		22) },
+	.odf_gate = {	CLKGEN_FIELD(0x54,	0x1,			0),
+			CLKGEN_FIELD(0x54,	0x1,			1),
+			CLKGEN_FIELD(0x54,	0x1,			2),
+			CLKGEN_FIELD(0x54,	0x1,			3) },
+	.ops		= &stm_pll3200c32_ops,
+};
+
+static const struct clkgen_pll_data st_pll3200c32_a1x_1 = {
+	.pdn_status	= CLKGEN_FIELD(0xC,	0x1,			31),
+	.locked_status	= CLKGEN_FIELD(0x10,	0x1,			31),
+	.ndiv		= CLKGEN_FIELD(0xC,	C32_NDIV_MASK,		0x0),
+	.idf		= CLKGEN_FIELD(0x10,	C32_IDF_MASK,		0x0),
+	.num_odfs = 4,
+	.odf = {	CLKGEN_FIELD(0x58,	C32_ODF_MASK,		4),
+			CLKGEN_FIELD(0x58,	C32_ODF_MASK,		10),
+			CLKGEN_FIELD(0x58,	C32_ODF_MASK,		16),
+			CLKGEN_FIELD(0x58,	C32_ODF_MASK,		22) },
+	.odf_gate = {	CLKGEN_FIELD(0x58,	0x1,			0),
+			CLKGEN_FIELD(0x58,	0x1,			1),
+			CLKGEN_FIELD(0x58,	0x1,			2),
+			CLKGEN_FIELD(0x58,	0x1,			3) },
+	.ops		= &stm_pll3200c32_ops,
+};
+
+/* 415 specific */
+static const struct clkgen_pll_data st_pll3200c32_a9_415 = {
+	.pdn_status	= CLKGEN_FIELD(0x0,	0x1,			0),
+	.locked_status	= CLKGEN_FIELD(0x6C,	0x1,			0),
+	.ndiv		= CLKGEN_FIELD(0x0,	C32_NDIV_MASK,		9),
+	.idf		= CLKGEN_FIELD(0x0,	C32_IDF_MASK,		22),
+	.num_odfs = 1,
+	.odf =		{ CLKGEN_FIELD(0x0,	C32_ODF_MASK,		3) },
+	.odf_gate =	{ CLKGEN_FIELD(0x0,	0x1,			28) },
+	.ops		= &stm_pll3200c32_ops,
+};
+
+static const struct clkgen_pll_data st_pll3200c32_ddr_415 = {
+	.pdn_status	= CLKGEN_FIELD(0x0,	0x1,			0),
+	.locked_status	= CLKGEN_FIELD(0x100,	0x1,			0),
+	.ndiv		= CLKGEN_FIELD(0x8,	C32_NDIV_MASK,		0),
+	.idf		= CLKGEN_FIELD(0x0,	C32_IDF_MASK,		25),
+	.num_odfs = 2,
+	.odf		= { CLKGEN_FIELD(0x8,	C32_ODF_MASK,		8),
+			    CLKGEN_FIELD(0x8,	C32_ODF_MASK,		14) },
+	.odf_gate	= { CLKGEN_FIELD(0x4,	0x1,			28),
+			    CLKGEN_FIELD(0x4,	0x1,			29) },
+	.ops		= &stm_pll3200c32_ops,
+};
+
+static const struct clkgen_pll_data st_pll1200c32_gpu_415 = {
+	.pdn_status	= CLKGEN_FIELD(0x144,	0x1,			3),
+	.locked_status	= CLKGEN_FIELD(0x168,	0x1,			0),
+	.ldf		= CLKGEN_FIELD(0x0,	C32_LDF_MASK,		3),
+	.idf		= CLKGEN_FIELD(0x0,	C32_IDF_MASK,		0),
+	.num_odfs = 0,
+	.odf		= { CLKGEN_FIELD(0x0,	C32_ODF_MASK,		10) },
+	.ops		= &st_pll1200c32_ops,
+};
+
+/* 416 specific */
+static const struct clkgen_pll_data st_pll3200c32_a9_416 = {
+	.pdn_status	= CLKGEN_FIELD(0x0,	0x1,			0),
+	.locked_status	= CLKGEN_FIELD(0x6C,	0x1,			0),
+	.ndiv		= CLKGEN_FIELD(0x8,	C32_NDIV_MASK,		0),
+	.idf		= CLKGEN_FIELD(0x0,	C32_IDF_MASK,		25),
+	.num_odfs = 1,
+	.odf		= { CLKGEN_FIELD(0x8,	C32_ODF_MASK,		8) },
+	.odf_gate	= { CLKGEN_FIELD(0x4,	0x1,			28) },
+	.ops		= &stm_pll3200c32_ops,
+};
+
+static const struct clkgen_pll_data st_pll3200c32_ddr_416 = {
+	.pdn_status	= CLKGEN_FIELD(0x0,	0x1,			0),
+	.locked_status	= CLKGEN_FIELD(0x10C,	0x1,			0),
+	.ndiv		= CLKGEN_FIELD(0x8,	C32_NDIV_MASK,		0),
+	.idf		= CLKGEN_FIELD(0x0,	C32_IDF_MASK,		25),
+	.num_odfs = 2,
+	.odf		= { CLKGEN_FIELD(0x8,	C32_ODF_MASK,		8),
+			    CLKGEN_FIELD(0x8,	C32_ODF_MASK,		14) },
+	.odf_gate	= { CLKGEN_FIELD(0x4,	0x1,			28),
+			    CLKGEN_FIELD(0x4,	0x1,			29) },
+	.ops		= &stm_pll3200c32_ops,
+};
+
+static const struct clkgen_pll_data st_pll1200c32_gpu_416 = {
+	.pdn_status	= CLKGEN_FIELD(0x8E4,	0x1,			3),
+	.locked_status	= CLKGEN_FIELD(0x90C,	0x1,			0),
+	.ldf		= CLKGEN_FIELD(0x0,	C32_LDF_MASK,		3),
+	.idf		= CLKGEN_FIELD(0x0,	C32_IDF_MASK,		0),
+	.num_odfs = 0,
+	.odf		= { CLKGEN_FIELD(0x0,	C32_ODF_MASK,		10) },
+	.ops		= &st_pll1200c32_ops,
+};
+
+static const struct clkgen_pll_data st_pll3200c32_407_a0 = {
+	/* 407 A0 */
+	.pdn_status	= CLKGEN_FIELD(0x2a0,	0x1,			8),
+	.locked_status	= CLKGEN_FIELD(0x2a0,	0x1,			24),
+	.ndiv		= CLKGEN_FIELD(0x2a4,	C32_NDIV_MASK,		16),
+	.idf		= CLKGEN_FIELD(0x2a4,	C32_IDF_MASK,		0x0),
+	.num_odfs = 1,
+	.odf		= { CLKGEN_FIELD(0x2b4, C32_ODF_MASK,		0) },
+	.odf_gate	= { CLKGEN_FIELD(0x2b4,	0x1,			6) },
+	.ops		= &stm_pll3200c32_ops,
+};
+
+static const struct clkgen_pll_data st_pll3200c32_407_c0_0 = {
+	/* 407 C0 PLL0 */
+	.pdn_status	= CLKGEN_FIELD(0x2a0,	0x1,			8),
+	.locked_status	= CLKGEN_FIELD(0x2a0,	0x1,			24),
+	.ndiv		= CLKGEN_FIELD(0x2a4,	C32_NDIV_MASK,		16),
+	.idf		= CLKGEN_FIELD(0x2a4,	C32_IDF_MASK,		0x0),
+	.num_odfs = 1,
+	.odf		= { CLKGEN_FIELD(0x2b4, C32_ODF_MASK,		0) },
+	.odf_gate	= { CLKGEN_FIELD(0x2b4, 0x1,			6) },
+	.ops		= &stm_pll3200c32_ops,
+};
+
+static const struct clkgen_pll_data st_pll3200c32_407_c0_1 = {
+	/* 407 C0 PLL1 */
+	.pdn_status	= CLKGEN_FIELD(0x2c8,	0x1,			8),
+	.locked_status	= CLKGEN_FIELD(0x2c8,	0x1,			24),
+	.ndiv		= CLKGEN_FIELD(0x2cc,	C32_NDIV_MASK,		16),
+	.idf		= CLKGEN_FIELD(0x2cc,	C32_IDF_MASK,		0x0),
+	.num_odfs = 1,
+	.odf		= { CLKGEN_FIELD(0x2dc, C32_ODF_MASK,		0) },
+	.odf_gate	= { CLKGEN_FIELD(0x2dc, 0x1,			6) },
+	.ops		= &stm_pll3200c32_ops,
+};
+
+static const struct clkgen_pll_data st_pll3200c32_407_a9 = {
+	/* 407 A9 */
+	.pdn_status	= CLKGEN_FIELD(0x1a8,	0x1,			0),
+	.locked_status	= CLKGEN_FIELD(0x87c,	0x1,			0),
+	.ndiv		= CLKGEN_FIELD(0x1b0,	C32_NDIV_MASK,		0),
+	.idf		= CLKGEN_FIELD(0x1a8,	C32_IDF_MASK,		25),
+	.num_odfs = 1,
+	.odf		= { CLKGEN_FIELD(0x1b0, C32_ODF_MASK,		8) },
+	.odf_gate	= { CLKGEN_FIELD(0x1ac, 0x1,			28) },
+	.ops		= &stm_pll3200c32_ops,
+};
+
+/**
+ * DOC: Clock Generated by PLL, rate set and enabled by bootloader
+ *
+ * Traits of this clock:
+ * prepare - clk_(un)prepare only ensures parent is (un)prepared
+ * enable - clk_enable/disable only ensures parent is enabled
+ * rate - rate is fixed. No clk_set_rate support
+ * parent - fixed parent.  No clk_set_parent support
+ */
+
+/**
+ * PLL clock that is integrated in the ClockGenA instances on the STiH415
+ * and STiH416.
+ *
+ * @hw: handle between common and hardware-specific interfaces.
+ * @type: PLL instance type.
+ * @regs_base: base of the PLL configuration register(s).
+ *
+ */
+struct clkgen_pll {
+	struct clk_hw		hw;
+	struct clkgen_pll_data	*data;
+	void __iomem		*regs_base;
+};
+
+#define to_clkgen_pll(_hw) container_of(_hw, struct clkgen_pll, hw)
+
+static int clkgen_pll_is_locked(struct clk_hw *hw)
+{
+	struct clkgen_pll *pll = to_clkgen_pll(hw);
+	u32 locked = CLKGEN_READ(pll, locked_status);
+
+	return !!locked;
+}
+
+static int clkgen_pll_is_enabled(struct clk_hw *hw)
+{
+	struct clkgen_pll *pll = to_clkgen_pll(hw);
+	u32 poweroff = CLKGEN_READ(pll, pdn_status);
+	return !poweroff;
+}
+
+unsigned long recalc_stm_pll800c65(struct clk_hw *hw,
+		unsigned long parent_rate)
+{
+	struct clkgen_pll *pll = to_clkgen_pll(hw);
+	unsigned long mdiv, ndiv, pdiv;
+	unsigned long rate;
+	uint64_t res;
+
+	if (!clkgen_pll_is_enabled(hw) || !clkgen_pll_is_locked(hw))
+		return 0;
+
+	pdiv = CLKGEN_READ(pll, pdiv);
+	mdiv = CLKGEN_READ(pll, mdiv);
+	ndiv = CLKGEN_READ(pll, ndiv);
+
+	if (!mdiv)
+		mdiv++; /* mdiv=0 or 1 => MDIV=1 */
+
+	res = (uint64_t)2 * (uint64_t)parent_rate * (uint64_t)ndiv;
+	rate = (unsigned long)div64_u64(res, mdiv * (1 << pdiv));
+
+	pr_debug("%s:%s rate %lu\n", __clk_get_name(hw->clk), __func__, rate);
+
+	return rate;
+
+}
+
+unsigned long recalc_stm_pll1600c65(struct clk_hw *hw,
+		unsigned long parent_rate)
+{
+	struct clkgen_pll *pll = to_clkgen_pll(hw);
+	unsigned long mdiv, ndiv;
+	unsigned long rate;
+
+	if (!clkgen_pll_is_enabled(hw) || !clkgen_pll_is_locked(hw))
+		return 0;
+
+	mdiv = CLKGEN_READ(pll, mdiv);
+	ndiv = CLKGEN_READ(pll, ndiv);
+
+	if (!mdiv)
+		mdiv = 1;
+
+	/* Note: input is divided by 1000 to avoid overflow */
+	rate = ((2 * (parent_rate / 1000) * ndiv) / mdiv) * 1000;
+
+	pr_debug("%s:%s rate %lu\n", __clk_get_name(hw->clk), __func__, rate);
+
+	return rate;
+}
+
+unsigned long recalc_stm_pll3200c32(struct clk_hw *hw,
+		unsigned long parent_rate)
+{
+	struct clkgen_pll *pll = to_clkgen_pll(hw);
+	unsigned long ndiv, idf;
+	unsigned long rate = 0;
+
+	if (!clkgen_pll_is_enabled(hw) || !clkgen_pll_is_locked(hw))
+		return 0;
+
+	ndiv = CLKGEN_READ(pll, ndiv);
+	idf = CLKGEN_READ(pll, idf);
+
+	if (idf)
+		/* Note: input is divided to avoid overflow */
+		rate = ((2 * (parent_rate/1000) * ndiv) / idf) * 1000;
+
+	pr_debug("%s:%s rate %lu\n", __clk_get_name(hw->clk), __func__, rate);
+
+	return rate;
+}
+
+unsigned long recalc_stm_pll1200c32(struct clk_hw *hw,
+		unsigned long parent_rate)
+{
+	struct clkgen_pll *pll = to_clkgen_pll(hw);
+	unsigned long odf, ldf, idf;
+	unsigned long rate;
+
+	if (!clkgen_pll_is_enabled(hw) || !clkgen_pll_is_locked(hw))
+		return 0;
+
+	odf = CLKGEN_READ(pll, odf[0]);
+	ldf = CLKGEN_READ(pll, ldf);
+	idf = CLKGEN_READ(pll, idf);
+
+	if (!idf) /* idf==0 means 1 */
+		idf = 1;
+	if (!odf) /* odf==0 means 1 */
+		odf = 1;
+
+	/* Note: input is divided by 1000 to avoid overflow */
+	rate = (((parent_rate / 1000) * ldf) / (odf * idf)) * 1000;
+
+	pr_debug("%s:%s rate %lu\n", __clk_get_name(hw->clk), __func__, rate);
+
+	return rate;
+}
+
+static const struct clk_ops st_pll1600c65_ops = {
+	.is_enabled	= clkgen_pll_is_enabled,
+	.recalc_rate	= recalc_stm_pll1600c65,
+};
+
+static const struct clk_ops st_pll800c65_ops = {
+	.is_enabled	= clkgen_pll_is_enabled,
+	.recalc_rate	= recalc_stm_pll800c65,
+};
+
+static const struct clk_ops stm_pll3200c32_ops = {
+	.is_enabled	= clkgen_pll_is_enabled,
+	.recalc_rate	= recalc_stm_pll3200c32,
+};
+
+static const struct clk_ops st_pll1200c32_ops = {
+	.is_enabled	= clkgen_pll_is_enabled,
+	.recalc_rate	= recalc_stm_pll1200c32,
+};
+
+static struct clk * __init clkgen_pll_register(const char *parent_name,
+				struct clkgen_pll_data	*pll_data,
+				void __iomem *reg,
+				const char *clk_name)
+{
+	struct clkgen_pll *pll;
+	struct clk *clk;
+	struct clk_init_data init;
+
+	pll = kzalloc(sizeof(*pll), GFP_KERNEL);
+	if (!pll)
+		return ERR_PTR(-ENOMEM);
+
+	init.name = clk_name;
+	init.ops = pll_data->ops;
+
+	init.flags = CLK_IS_BASIC;
+	init.parent_names = &parent_name;
+	init.num_parents  = 1;
+
+	pll->data = pll_data;
+	pll->regs_base = reg;
+	pll->hw.init = &init;
+
+	clk = clk_register(NULL, &pll->hw);
+	if (IS_ERR(clk)) {
+		kfree(pll);
+		return clk;
+	}
+
+	pr_debug("%s: parent %s rate %lu\n",
+			__clk_get_name(clk),
+			__clk_get_name(clk_get_parent(clk)),
+			clk_get_rate(clk));
+
+	return clk;
+}
+
+static struct clk * __init clkgen_c65_lsdiv_register(const char *parent_name,
+						     const char *clk_name)
+{
+	struct clk *clk;
+
+	clk = clk_register_fixed_factor(NULL, clk_name, parent_name, 0, 1, 2);
+	if (IS_ERR(clk))
+		return clk;
+
+	pr_debug("%s: parent %s rate %lu\n",
+			__clk_get_name(clk),
+			__clk_get_name(clk_get_parent(clk)),
+			clk_get_rate(clk));
+	return clk;
+}
+
+static void __iomem * __init clkgen_get_register_base(
+				struct device_node *np)
+{
+	struct device_node *pnode;
+	void __iomem *reg = NULL;
+
+	pnode = of_get_parent(np);
+	if (!pnode)
+		return NULL;
+
+	reg = of_iomap(pnode, 0);
+
+	of_node_put(pnode);
+	return reg;
+}
+
+#define CLKGENAx_PLL0_OFFSET 0x0
+#define CLKGENAx_PLL1_OFFSET 0x4
+
+static void __init clkgena_c65_pll_setup(struct device_node *np)
+{
+	const int num_pll_outputs = 3;
+	struct clk_onecell_data *clk_data;
+	const char *parent_name;
+	void __iomem *reg;
+	const char *clk_name;
+
+	parent_name = of_clk_get_parent_name(np, 0);
+	if (!parent_name)
+		return;
+
+	reg = clkgen_get_register_base(np);
+	if (!reg)
+		return;
+
+	clk_data = kzalloc(sizeof(*clk_data), GFP_KERNEL);
+	if (!clk_data)
+		return;
+
+	clk_data->clk_num = num_pll_outputs;
+	clk_data->clks = kzalloc(clk_data->clk_num * sizeof(struct clk *),
+				 GFP_KERNEL);
+
+	if (!clk_data->clks)
+		goto err;
+
+	if (of_property_read_string_index(np, "clock-output-names",
+					  0, &clk_name))
+		goto err;
+
+	/*
+	 * PLL0 HS (high speed) output
+	 */
+	clk_data->clks[0] = clkgen_pll_register(parent_name,
+			(struct clkgen_pll_data *) &st_pll1600c65_ax,
+			reg + CLKGENAx_PLL0_OFFSET, clk_name);
+
+	if (IS_ERR(clk_data->clks[0]))
+		goto err;
+
+	if (of_property_read_string_index(np, "clock-output-names",
+					  1, &clk_name))
+		goto err;
+
+	/*
+	 * PLL0 LS (low speed) output, which is a fixed divide by 2 of the
+	 * high speed output.
+	 */
+	clk_data->clks[1] = clkgen_c65_lsdiv_register(__clk_get_name
+						      (clk_data->clks[0]),
+						      clk_name);
+
+	if (IS_ERR(clk_data->clks[1]))
+		goto err;
+
+	if (of_property_read_string_index(np, "clock-output-names",
+					  2, &clk_name))
+		goto err;
+
+	/*
+	 * PLL1 output
+	 */
+	clk_data->clks[2] = clkgen_pll_register(parent_name,
+			(struct clkgen_pll_data *) &st_pll800c65_ax,
+			reg + CLKGENAx_PLL1_OFFSET, clk_name);
+
+	if (IS_ERR(clk_data->clks[2]))
+		goto err;
+
+	of_clk_add_provider(np, of_clk_src_onecell_get, clk_data);
+	return;
+
+err:
+	kfree(clk_data->clks);
+	kfree(clk_data);
+}
+CLK_OF_DECLARE(clkgena_c65_plls,
+	       "st,clkgena-plls-c65", clkgena_c65_pll_setup);
+
+static struct clk * __init clkgen_odf_register(const char *parent_name,
+					       void * __iomem reg,
+					       struct clkgen_pll_data *pll_data,
+					       int odf,
+					       spinlock_t *odf_lock,
+					       const char *odf_name)
+{
+	struct clk *clk;
+	unsigned long flags;
+	struct clk_gate *gate;
+	struct clk_divider *div;
+
+	flags = CLK_GET_RATE_NOCACHE | CLK_SET_RATE_GATE;
+
+	gate = kzalloc(sizeof(*gate), GFP_KERNEL);
+	if (!gate)
+		return ERR_PTR(-ENOMEM);
+
+	gate->flags = CLK_GATE_SET_TO_DISABLE;
+	gate->reg = reg + pll_data->odf_gate[odf].offset;
+	gate->bit_idx = pll_data->odf_gate[odf].shift;
+	gate->lock = odf_lock;
+
+	div = kzalloc(sizeof(*div), GFP_KERNEL);
+	if (!div) {
+		kfree(gate);
+		return ERR_PTR(-ENOMEM);
+	}
+
+	div->flags = CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO;
+	div->reg = reg + pll_data->odf[odf].offset;
+	div->shift = pll_data->odf[odf].shift;
+	div->width = fls(pll_data->odf[odf].mask);
+	div->lock = odf_lock;
+
+	clk = clk_register_composite(NULL, odf_name, &parent_name, 1,
+				     NULL, NULL,
+				     &div->hw, &clk_divider_ops,
+				     &gate->hw, &clk_gate_ops,
+				     flags);
+	if (IS_ERR(clk))
+		return clk;
+
+	pr_debug("%s: parent %s rate %lu\n",
+			__clk_get_name(clk),
+			__clk_get_name(clk_get_parent(clk)),
+			clk_get_rate(clk));
+	return clk;
+}
+
+static struct of_device_id c32_pll_of_match[] = {
+	{
+		.compatible = "st,plls-c32-a1x-0",
+		.data = &st_pll3200c32_a1x_0,
+	},
+	{
+		.compatible = "st,plls-c32-a1x-1",
+		.data = &st_pll3200c32_a1x_1,
+	},
+	{
+		.compatible = "st,stih415-plls-c32-a9",
+		.data = &st_pll3200c32_a9_415,
+	},
+	{
+		.compatible = "st,stih415-plls-c32-ddr",
+		.data = &st_pll3200c32_ddr_415,
+	},
+	{
+		.compatible = "st,stih416-plls-c32-a9",
+		.data = &st_pll3200c32_a9_416,
+	},
+	{
+		.compatible = "st,stih416-plls-c32-ddr",
+		.data = &st_pll3200c32_ddr_416,
+	},
+	{
+		.compatible = "st,stih407-plls-c32-a0",
+		.data = &st_pll3200c32_407_a0,
+	},
+	{
+		.compatible = "st,stih407-plls-c32-c0_0",
+		.data = &st_pll3200c32_407_c0_0,
+	},
+	{
+		.compatible = "st,stih407-plls-c32-c0_1",
+		.data = &st_pll3200c32_407_c0_1,
+	},
+	{
+		.compatible = "st,stih407-plls-c32-a9",
+		.data = &st_pll3200c32_407_a9,
+	},
+	{}
+};
+
+static void __init clkgen_c32_pll_setup(struct device_node *np)
+{
+	const struct of_device_id *match;
+	struct clk *clk;
+	const char *parent_name, *pll_name;
+	void __iomem *pll_base;
+	int num_odfs, odf;
+	struct clk_onecell_data *clk_data;
+	struct clkgen_pll_data	*data;
+
+	match = of_match_node(c32_pll_of_match, np);
+	if (!match) {
+		pr_err("%s: No matching data\n", __func__);
+		return;
+	}
+
+	data = (struct clkgen_pll_data *) match->data;
+
+	parent_name = of_clk_get_parent_name(np, 0);
+	if (!parent_name)
+		return;
+
+	pll_base = clkgen_get_register_base(np);
+	if (!pll_base)
+		return;
+
+	clk = clkgen_pll_register(parent_name, data, pll_base, np->name);
+	if (IS_ERR(clk))
+		return;
+
+	pll_name = __clk_get_name(clk);
+
+	num_odfs = data->num_odfs;
+
+	clk_data = kzalloc(sizeof(*clk_data), GFP_KERNEL);
+	if (!clk_data)
+		return;
+
+	clk_data->clk_num = num_odfs;
+	clk_data->clks = kzalloc(clk_data->clk_num * sizeof(struct clk *),
+				 GFP_KERNEL);
+
+	if (!clk_data->clks)
+		goto err;
+
+	for (odf = 0; odf < num_odfs; odf++) {
+		struct clk *clk;
+		const char *clk_name;
+
+		if (of_property_read_string_index(np, "clock-output-names",
+						  odf, &clk_name))
+			return;
+
+		clk = clkgen_odf_register(pll_name, pll_base, data,
+				odf, &clkgena_c32_odf_lock, clk_name);
+		if (IS_ERR(clk))
+			goto err;
+
+		clk_data->clks[odf] = clk;
+	}
+
+	of_clk_add_provider(np, of_clk_src_onecell_get, clk_data);
+	return;
+
+err:
+	kfree(pll_name);
+	kfree(clk_data->clks);
+	kfree(clk_data);
+}
+CLK_OF_DECLARE(clkgen_c32_pll, "st,clkgen-plls-c32", clkgen_c32_pll_setup);
+
+static struct of_device_id c32_gpu_pll_of_match[] = {
+	{
+		.compatible = "st,stih415-gpu-pll-c32",
+		.data = &st_pll1200c32_gpu_415,
+	},
+	{
+		.compatible = "st,stih416-gpu-pll-c32",
+		.data = &st_pll1200c32_gpu_416,
+	},
+	{}
+};
+
+static void __init clkgengpu_c32_pll_setup(struct device_node *np)
+{
+	const struct of_device_id *match;
+	struct clk *clk;
+	const char *parent_name;
+	void __iomem *reg;
+	const char *clk_name;
+	struct clkgen_pll_data	*data;
+
+	match = of_match_node(c32_gpu_pll_of_match, np);
+	if (!match) {
+		pr_err("%s: No matching data\n", __func__);
+		return;
+	}
+
+	data = (struct clkgen_pll_data *)match->data;
+
+	parent_name = of_clk_get_parent_name(np, 0);
+	if (!parent_name)
+		return;
+
+	reg = clkgen_get_register_base(np);
+	if (!reg)
+		return;
+
+	if (of_property_read_string_index(np, "clock-output-names",
+					  0, &clk_name))
+		return;
+
+	/*
+	 * PLL 1200MHz output
+	 */
+	clk = clkgen_pll_register(parent_name, data, reg, clk_name);
+
+	if (!IS_ERR(clk))
+		of_clk_add_provider(np, of_clk_src_simple_get, clk);
+
+	return;
+}
+CLK_OF_DECLARE(clkgengpu_c32_pll,
+	       "st,clkgengpu-pll-c32", clkgengpu_c32_pll_setup);

drivers/clk/st/clkgen.h

@@ -0,0 +1,48 @@
+/************************************************************************
+File  : Clock H/w specific Information
+
+Author: Pankaj Dev <pankaj.dev@st.com>
+
+Copyright (C) 2014 STMicroelectronics
+************************************************************************/
+
+#ifndef __CLKGEN_INFO_H
+#define __CLKGEN_INFO_H
+
+struct clkgen_field {
+	unsigned int offset;
+	unsigned int mask;
+	unsigned int shift;
+};
+
+static inline unsigned long clkgen_read(void __iomem	*base,
+					  struct clkgen_field *field)
+{
+	return (readl(base + field->offset) >> field->shift) & field->mask;
+}
+
+
+static inline void clkgen_write(void __iomem *base, struct clkgen_field *field,
+				  unsigned long val)
+{
+	writel((readl(base + field->offset) &
+	       ~(field->mask << field->shift)) | (val << field->shift),
+	       base + field->offset);
+
+	return;
+}
+
+#define CLKGEN_FIELD(_offset, _mask, _shift) {		\
+				.offset	= _offset,	\
+				.mask	= _mask,	\
+				.shift	= _shift,	\
+				}
+
+#define CLKGEN_READ(pll, field) clkgen_read(pll->regs_base, \
+		&pll->data->field)
+
+#define CLKGEN_WRITE(pll, field, val) clkgen_write(pll->regs_base, \
+		&pll->data->field, val)
+
+#endif /*__CLKGEN_INFO_H*/
+