clk: renesas: cpg-mssr: Extract common R-Car Gen3 support code (5b1defde) · Commits · 戴 / test

drivers/clk/renesas/Makefile

+1 −1

Original line number	Diff line number	Diff line
		@@ -8,7 +8,7 @@ obj-$(CONFIG_ARCH_R8A7790) += clk-rcar-gen2.o clk-div6.o
		obj-$(CONFIG_ARCH_R8A7791) += clk-rcar-gen2.o clk-div6.o
		obj-$(CONFIG_ARCH_R8A7793) += clk-rcar-gen2.o clk-div6.o
		obj-$(CONFIG_ARCH_R8A7794) += clk-rcar-gen2.o clk-div6.o
		obj-$(CONFIG_ARCH_R8A7795) += r8a7795-cpg-mssr.o
		obj-$(CONFIG_ARCH_R8A7795) += r8a7795-cpg-mssr.o rcar-gen3-cpg.o
		obj-$(CONFIG_ARCH_SH73A0) += clk-sh73a0.o clk-div6.o

		obj-$(CONFIG_CLK_RENESAS_CPG_MSSR) += renesas-cpg-mssr.o clk-div6.o

drivers/clk/renesas/r8a7795-cpg-mssr.c

+5 −355

Original line number	Diff line number	Diff line
		@@ -12,22 +12,14 @@
		* the Free Software Foundation; version 2 of the License.
		*/

		#include <linux/bug.h>
		#include <linux/clk.h>
		#include <linux/clk-provider.h>
		#include <linux/device.h>
		#include <linux/err.h>
		#include <linux/init.h>
		#include <linux/io.h>
		#include <linux/kernel.h>
		#include <linux/of.h>
		#include <linux/slab.h>

		#include <dt-bindings/clock/r8a7795-cpg-mssr.h>

		#include "renesas-cpg-mssr.h"

		#define CPG_RCKCR 0x240
		#include "rcar-gen3-cpg.h"

		enum clk_ids {
		/* Core Clock Outputs exported to DT */
		@@ -58,20 +50,6 @@ enum clk_ids {
		MOD_CLK_BASE
		};

		enum r8a7795_clk_types {
		CLK_TYPE_GEN3_MAIN = CLK_TYPE_CUSTOM,
		CLK_TYPE_GEN3_PLL0,
		CLK_TYPE_GEN3_PLL1,
		CLK_TYPE_GEN3_PLL2,
		CLK_TYPE_GEN3_PLL3,
		CLK_TYPE_GEN3_PLL4,
		CLK_TYPE_GEN3_SD,
		CLK_TYPE_GEN3_R,
		};

		#define DEF_GEN3_SD(_name, _id, _parent, _offset) \
		DEF_BASE(_name, _id, CLK_TYPE_GEN3_SD, _parent, .offset = _offset)

		static const struct cpg_core_clk r8a7795_core_clks[] __initconst = {
		/* External Clock Inputs */
		DEF_INPUT("extal", CLK_EXTAL),
		@@ -262,225 +240,6 @@ static const unsigned int r8a7795_crit_mod_clks[] __initconst = {
		MOD_CLK_ID(408), /* INTC-AP (GIC) */
		};

		/* -----------------------------------------------------------------------------
		* SDn Clock
		*
		*/
		#define CPG_SD_STP_HCK BIT(9)
		#define CPG_SD_STP_CK BIT(8)

		#define CPG_SD_STP_MASK (CPG_SD_STP_HCK \| CPG_SD_STP_CK)
		#define CPG_SD_FC_MASK (0x7 << 2 \| 0x3 << 0)

		#define CPG_SD_DIV_TABLE_DATA(stp_hck, stp_ck, sd_srcfc, sd_fc, sd_div) \
		{ \
		.val = ((stp_hck) ? CPG_SD_STP_HCK : 0) \| \
		((stp_ck) ? CPG_SD_STP_CK : 0) \| \
		((sd_srcfc) << 2) \| \
		((sd_fc) << 0), \
		.div = (sd_div), \
		}

		struct sd_div_table {
		u32 val;
		unsigned int div;
		};

		struct sd_clock {
		struct clk_hw hw;
		void __iomem *reg;
		const struct sd_div_table *div_table;
		unsigned int div_num;
		unsigned int div_min;
		unsigned int div_max;
		};

		/* SDn divider
		* sd_srcfc sd_fc div
		* stp_hck stp_ck (div) (div) = sd_srcfc x sd_fc
		*-------------------------------------------------------------------
		* 0 0 0 (1) 1 (4) 4
		* 0 0 1 (2) 1 (4) 8
		* 1 0 2 (4) 1 (4) 16
		* 1 0 3 (8) 1 (4) 32
		* 1 0 4 (16) 1 (4) 64
		* 0 0 0 (1) 0 (2) 2
		* 0 0 1 (2) 0 (2) 4
		* 1 0 2 (4) 0 (2) 8
		* 1 0 3 (8) 0 (2) 16
		* 1 0 4 (16) 0 (2) 32
		*/
		static const struct sd_div_table cpg_sd_div_table[] = {
		/* CPG_SD_DIV_TABLE_DATA(stp_hck, stp_ck, sd_srcfc, sd_fc, sd_div) */
		CPG_SD_DIV_TABLE_DATA(0, 0, 0, 1, 4),
		CPG_SD_DIV_TABLE_DATA(0, 0, 1, 1, 8),
		CPG_SD_DIV_TABLE_DATA(1, 0, 2, 1, 16),
		CPG_SD_DIV_TABLE_DATA(1, 0, 3, 1, 32),
		CPG_SD_DIV_TABLE_DATA(1, 0, 4, 1, 64),
		CPG_SD_DIV_TABLE_DATA(0, 0, 0, 0, 2),
		CPG_SD_DIV_TABLE_DATA(0, 0, 1, 0, 4),
		CPG_SD_DIV_TABLE_DATA(1, 0, 2, 0, 8),
		CPG_SD_DIV_TABLE_DATA(1, 0, 3, 0, 16),
		CPG_SD_DIV_TABLE_DATA(1, 0, 4, 0, 32),
		};

		#define to_sd_clock(_hw) container_of(_hw, struct sd_clock, hw)

		static int cpg_sd_clock_enable(struct clk_hw *hw)
		{
		struct sd_clock *clock = to_sd_clock(hw);
		u32 val, sd_fc;
		unsigned int i;

		val = clk_readl(clock->reg);

		sd_fc = val & CPG_SD_FC_MASK;
		for (i = 0; i < clock->div_num; i++)
		if (sd_fc == (clock->div_table[i].val & CPG_SD_FC_MASK))
		break;

		if (i >= clock->div_num)
		return -EINVAL;

		val &= ~(CPG_SD_STP_MASK);
		val \|= clock->div_table[i].val & CPG_SD_STP_MASK;

		clk_writel(val, clock->reg);

		return 0;
		}

		static void cpg_sd_clock_disable(struct clk_hw *hw)
		{
		struct sd_clock *clock = to_sd_clock(hw);

		clk_writel(clk_readl(clock->reg) \| CPG_SD_STP_MASK, clock->reg);
		}

		static int cpg_sd_clock_is_enabled(struct clk_hw *hw)
		{
		struct sd_clock *clock = to_sd_clock(hw);

		return !(clk_readl(clock->reg) & CPG_SD_STP_MASK);
		}

		static unsigned long cpg_sd_clock_recalc_rate(struct clk_hw *hw,
		unsigned long parent_rate)
		{
		struct sd_clock *clock = to_sd_clock(hw);
		unsigned long rate = parent_rate;
		u32 val, sd_fc;
		unsigned int i;

		val = clk_readl(clock->reg);

		sd_fc = val & CPG_SD_FC_MASK;
		for (i = 0; i < clock->div_num; i++)
		if (sd_fc == (clock->div_table[i].val & CPG_SD_FC_MASK))
		break;

		if (i >= clock->div_num)
		return -EINVAL;

		return DIV_ROUND_CLOSEST(rate, clock->div_table[i].div);
		}

		static unsigned int cpg_sd_clock_calc_div(struct sd_clock *clock,
		unsigned long rate,
		unsigned long parent_rate)
		{
		unsigned int div;

		if (!rate)
		rate = 1;

		div = DIV_ROUND_CLOSEST(parent_rate, rate);

		return clamp_t(unsigned int, div, clock->div_min, clock->div_max);
		}

		static long cpg_sd_clock_round_rate(struct clk_hw *hw, unsigned long rate,
		unsigned long *parent_rate)
		{
		struct sd_clock *clock = to_sd_clock(hw);
		unsigned int div = cpg_sd_clock_calc_div(clock, rate, *parent_rate);

		return DIV_ROUND_CLOSEST(*parent_rate, div);
		}

		static int cpg_sd_clock_set_rate(struct clk_hw *hw, unsigned long rate,
		unsigned long parent_rate)
		{
		struct sd_clock *clock = to_sd_clock(hw);
		unsigned int div = cpg_sd_clock_calc_div(clock, rate, parent_rate);
		u32 val;
		unsigned int i;

		for (i = 0; i < clock->div_num; i++)
		if (div == clock->div_table[i].div)
		break;

		if (i >= clock->div_num)
		return -EINVAL;

		val = clk_readl(clock->reg);
		val &= ~(CPG_SD_STP_MASK \| CPG_SD_FC_MASK);
		val \|= clock->div_table[i].val & (CPG_SD_STP_MASK \| CPG_SD_FC_MASK);
		clk_writel(val, clock->reg);

		return 0;
		}

		static const struct clk_ops cpg_sd_clock_ops = {
		.enable = cpg_sd_clock_enable,
		.disable = cpg_sd_clock_disable,
		.is_enabled = cpg_sd_clock_is_enabled,
		.recalc_rate = cpg_sd_clock_recalc_rate,
		.round_rate = cpg_sd_clock_round_rate,
		.set_rate = cpg_sd_clock_set_rate,
		};

		static struct clk * __init cpg_sd_clk_register(const struct cpg_core_clk *core,
		void __iomem *base,
		const char *parent_name)
		{
		struct clk_init_data init;
		struct sd_clock *clock;
		struct clk *clk;
		unsigned int i;

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

		init.name = core->name;
		init.ops = &cpg_sd_clock_ops;
		init.flags = CLK_IS_BASIC \| CLK_SET_RATE_PARENT;
		init.parent_names = &parent_name;
		init.num_parents = 1;

		clock->reg = base + core->offset;
		clock->hw.init = &init;
		clock->div_table = cpg_sd_div_table;
		clock->div_num = ARRAY_SIZE(cpg_sd_div_table);

		clock->div_max = clock->div_table[0].div;
		clock->div_min = clock->div_max;
		for (i = 1; i < clock->div_num; i++) {
		clock->div_max = max(clock->div_max, clock->div_table[i].div);
		clock->div_min = min(clock->div_min, clock->div_table[i].div);
		}

		clk = clk_register(NULL, &clock->hw);
		if (IS_ERR(clk))
		kfree(clock);

		return clk;
		}

		#define CPG_PLL0CR 0x00d8
		#define CPG_PLL2CR 0x002c
		#define CPG_PLL4CR 0x01f4

		/*
		* CPG Clock Data
		@@ -512,13 +271,7 @@ static struct clk * __init cpg_sd_clk_register(const struct cpg_core_clk *core,
		(((md) & BIT(19)) >> 18) \| \
		(((md) & BIT(17)) >> 17))

		struct cpg_pll_config {
		unsigned int extal_div;
		unsigned int pll1_mult;
		unsigned int pll3_mult;
		};

		static const struct cpg_pll_config cpg_pll_configs[16] __initconst = {
		static const struct rcar_gen3_cpg_pll_config cpg_pll_configs[16] __initconst = {
		/* EXTAL div PLL1 mult PLL3 mult */
		{ 1, 192, 192, },
		{ 1, 192, 128, },
		@@ -538,112 +291,9 @@ static const struct cpg_pll_config cpg_pll_configs[16] __initconst = {
		{ 2, 192, 192, },
		};

		static const struct cpg_pll_config *cpg_pll_config __initdata;

		static
		struct clk * __init r8a7795_cpg_clk_register(struct device *dev,
		const struct cpg_core_clk *core,
		const struct cpg_mssr_info *info,
		struct clk **clks,
		void __iomem *base)
		{
		const struct clk *parent;
		unsigned int mult = 1;
		unsigned int div = 1;
		u32 value;

		parent = clks[core->parent];
		if (IS_ERR(parent))
		return ERR_CAST(parent);

		switch (core->type) {
		case CLK_TYPE_GEN3_MAIN:
		div = cpg_pll_config->extal_div;
		break;

		case CLK_TYPE_GEN3_PLL0:
		/*
		* PLL0 is a configurable multiplier clock. Register it as a
		* fixed factor clock for now as there's no generic multiplier
		* clock implementation and we currently have no need to change
		* the multiplier value.
		*/
		value = readl(base + CPG_PLL0CR);
		mult = (((value >> 24) & 0x7f) + 1) * 2;
		break;

		case CLK_TYPE_GEN3_PLL1:
		mult = cpg_pll_config->pll1_mult;
		break;

		case CLK_TYPE_GEN3_PLL2:
		/*
		* PLL2 is a configurable multiplier clock. Register it as a
		* fixed factor clock for now as there's no generic multiplier
		* clock implementation and we currently have no need to change
		* the multiplier value.
		*/
		value = readl(base + CPG_PLL2CR);
		mult = (((value >> 24) & 0x7f) + 1) * 2;
		break;

		case CLK_TYPE_GEN3_PLL3:
		mult = cpg_pll_config->pll3_mult;
		break;

		case CLK_TYPE_GEN3_PLL4:
		/*
		* PLL4 is a configurable multiplier clock. Register it as a
		* fixed factor clock for now as there's no generic multiplier
		* clock implementation and we currently have no need to change
		* the multiplier value.
		*/
		value = readl(base + CPG_PLL4CR);
		mult = (((value >> 24) & 0x7f) + 1) * 2;
		break;

		case CLK_TYPE_GEN3_SD:
		return cpg_sd_clk_register(core, base, __clk_get_name(parent));

		case CLK_TYPE_GEN3_R:
		/* RINT is default. Only if EXTALR is populated, we switch to it */
		value = readl(base + CPG_RCKCR) & 0x3f;

		if (clk_get_rate(clks[CLK_EXTALR])) {
		parent = clks[CLK_EXTALR];
		value \|= BIT(15);
		}

		writel(value, base + CPG_RCKCR);
		break;

		default:
		return ERR_PTR(-EINVAL);
		}

		return clk_register_fixed_factor(NULL, core->name,
		__clk_get_name(parent), 0, mult, div);
		}

		/*
		* Reset register definitions.
		*/
		#define MODEMR 0xe6160060

		static u32 rcar_gen3_read_mode_pins(void)
		{
		void __iomem *modemr = ioremap_nocache(MODEMR, 4);
		u32 mode;

		BUG_ON(!modemr);
		mode = ioread32(modemr);
		iounmap(modemr);

		return mode;
		}

		static int __init r8a7795_cpg_mssr_init(struct device *dev)
		{
		const struct rcar_gen3_cpg_pll_config *cpg_pll_config;
		u32 cpg_mode = rcar_gen3_read_mode_pins();

		cpg_pll_config = &cpg_pll_configs[CPG_PLL_CONFIG_INDEX(cpg_mode)];
		@@ -652,7 +302,7 @@ static int __init r8a7795_cpg_mssr_init(struct device *dev)
		return -EINVAL;
		}

		return 0;
		return rcar_gen3_cpg_init(cpg_pll_config, CLK_EXTALR);
		}

		const struct cpg_mssr_info r8a7795_cpg_mssr_info __initconst = {
		@@ -673,5 +323,5 @@ const struct cpg_mssr_info r8a7795_cpg_mssr_info __initconst = {

		/* Callbacks */
		.init = r8a7795_cpg_mssr_init,
		.cpg_clk_register = r8a7795_cpg_clk_register,
		.cpg_clk_register = rcar_gen3_cpg_clk_register,
		};

drivers/clk/renesas/rcar-gen3-cpg.c

0 → 100644

+359 −0

Original line number	Diff line number	Diff line
		/*
		* R-Car Gen3 Clock Pulse Generator
		*
		* Copyright (C) 2015-2016 Glider bvba
		*
		* Based on clk-rcar-gen3.c
		*
		* Copyright (C) 2015 Renesas Electronics Corp.
		*
		* 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; version 2 of the License.
		*/

		#include <linux/bug.h>
		#include <linux/clk.h>
		#include <linux/clk-provider.h>
		#include <linux/device.h>
		#include <linux/err.h>
		#include <linux/init.h>
		#include <linux/io.h>
		#include <linux/slab.h>

		#include "renesas-cpg-mssr.h"
		#include "rcar-gen3-cpg.h"

		#define CPG_PLL0CR 0x00d8
		#define CPG_PLL2CR 0x002c
		#define CPG_PLL4CR 0x01f4


		/*
		* SDn Clock
		*/
		#define CPG_SD_STP_HCK BIT(9)
		#define CPG_SD_STP_CK BIT(8)

		#define CPG_SD_STP_MASK (CPG_SD_STP_HCK \| CPG_SD_STP_CK)
		#define CPG_SD_FC_MASK (0x7 << 2 \| 0x3 << 0)

		#define CPG_SD_DIV_TABLE_DATA(stp_hck, stp_ck, sd_srcfc, sd_fc, sd_div) \
		{ \
		.val = ((stp_hck) ? CPG_SD_STP_HCK : 0) \| \
		((stp_ck) ? CPG_SD_STP_CK : 0) \| \
		((sd_srcfc) << 2) \| \
		((sd_fc) << 0), \
		.div = (sd_div), \
		}

		struct sd_div_table {
		u32 val;
		unsigned int div;
		};

		struct sd_clock {
		struct clk_hw hw;
		void __iomem *reg;
		const struct sd_div_table *div_table;
		unsigned int div_num;
		unsigned int div_min;
		unsigned int div_max;
		};

		/* SDn divider
		* sd_srcfc sd_fc div
		* stp_hck stp_ck (div) (div) = sd_srcfc x sd_fc
		*-------------------------------------------------------------------
		* 0 0 0 (1) 1 (4) 4
		* 0 0 1 (2) 1 (4) 8
		* 1 0 2 (4) 1 (4) 16
		* 1 0 3 (8) 1 (4) 32
		* 1 0 4 (16) 1 (4) 64
		* 0 0 0 (1) 0 (2) 2
		* 0 0 1 (2) 0 (2) 4
		* 1 0 2 (4) 0 (2) 8
		* 1 0 3 (8) 0 (2) 16
		* 1 0 4 (16) 0 (2) 32
		*/
		static const struct sd_div_table cpg_sd_div_table[] = {
		/* CPG_SD_DIV_TABLE_DATA(stp_hck, stp_ck, sd_srcfc, sd_fc, sd_div) */
		CPG_SD_DIV_TABLE_DATA(0, 0, 0, 1, 4),
		CPG_SD_DIV_TABLE_DATA(0, 0, 1, 1, 8),
		CPG_SD_DIV_TABLE_DATA(1, 0, 2, 1, 16),
		CPG_SD_DIV_TABLE_DATA(1, 0, 3, 1, 32),
		CPG_SD_DIV_TABLE_DATA(1, 0, 4, 1, 64),
		CPG_SD_DIV_TABLE_DATA(0, 0, 0, 0, 2),
		CPG_SD_DIV_TABLE_DATA(0, 0, 1, 0, 4),
		CPG_SD_DIV_TABLE_DATA(1, 0, 2, 0, 8),
		CPG_SD_DIV_TABLE_DATA(1, 0, 3, 0, 16),
		CPG_SD_DIV_TABLE_DATA(1, 0, 4, 0, 32),
		};

		#define to_sd_clock(_hw) container_of(_hw, struct sd_clock, hw)

		static int cpg_sd_clock_enable(struct clk_hw *hw)
		{
		struct sd_clock *clock = to_sd_clock(hw);
		u32 val, sd_fc;
		unsigned int i;

		val = clk_readl(clock->reg);

		sd_fc = val & CPG_SD_FC_MASK;
		for (i = 0; i < clock->div_num; i++)
		if (sd_fc == (clock->div_table[i].val & CPG_SD_FC_MASK))
		break;

		if (i >= clock->div_num)
		return -EINVAL;

		val &= ~(CPG_SD_STP_MASK);
		val \|= clock->div_table[i].val & CPG_SD_STP_MASK;

		clk_writel(val, clock->reg);

		return 0;
		}

		static void cpg_sd_clock_disable(struct clk_hw *hw)
		{
		struct sd_clock *clock = to_sd_clock(hw);

		clk_writel(clk_readl(clock->reg) \| CPG_SD_STP_MASK, clock->reg);
		}

		static int cpg_sd_clock_is_enabled(struct clk_hw *hw)
		{
		struct sd_clock *clock = to_sd_clock(hw);

		return !(clk_readl(clock->reg) & CPG_SD_STP_MASK);
		}

		static unsigned long cpg_sd_clock_recalc_rate(struct clk_hw *hw,
		unsigned long parent_rate)
		{
		struct sd_clock *clock = to_sd_clock(hw);
		unsigned long rate = parent_rate;
		u32 val, sd_fc;
		unsigned int i;

		val = clk_readl(clock->reg);

		sd_fc = val & CPG_SD_FC_MASK;
		for (i = 0; i < clock->div_num; i++)
		if (sd_fc == (clock->div_table[i].val & CPG_SD_FC_MASK))
		break;

		if (i >= clock->div_num)
		return -EINVAL;

		return DIV_ROUND_CLOSEST(rate, clock->div_table[i].div);
		}

		static unsigned int cpg_sd_clock_calc_div(struct sd_clock *clock,
		unsigned long rate,
		unsigned long parent_rate)
		{
		unsigned int div;

		if (!rate)
		rate = 1;

		div = DIV_ROUND_CLOSEST(parent_rate, rate);

		return clamp_t(unsigned int, div, clock->div_min, clock->div_max);
		}

		static long cpg_sd_clock_round_rate(struct clk_hw *hw, unsigned long rate,
		unsigned long *parent_rate)
		{
		struct sd_clock *clock = to_sd_clock(hw);
		unsigned int div = cpg_sd_clock_calc_div(clock, rate, *parent_rate);

		return DIV_ROUND_CLOSEST(*parent_rate, div);
		}

		static int cpg_sd_clock_set_rate(struct clk_hw *hw, unsigned long rate,
		unsigned long parent_rate)
		{
		struct sd_clock *clock = to_sd_clock(hw);
		unsigned int div = cpg_sd_clock_calc_div(clock, rate, parent_rate);
		u32 val;
		unsigned int i;

		for (i = 0; i < clock->div_num; i++)
		if (div == clock->div_table[i].div)
		break;

		if (i >= clock->div_num)
		return -EINVAL;

		val = clk_readl(clock->reg);
		val &= ~(CPG_SD_STP_MASK \| CPG_SD_FC_MASK);
		val \|= clock->div_table[i].val & (CPG_SD_STP_MASK \| CPG_SD_FC_MASK);
		clk_writel(val, clock->reg);

		return 0;
		}

		static const struct clk_ops cpg_sd_clock_ops = {
		.enable = cpg_sd_clock_enable,
		.disable = cpg_sd_clock_disable,
		.is_enabled = cpg_sd_clock_is_enabled,
		.recalc_rate = cpg_sd_clock_recalc_rate,
		.round_rate = cpg_sd_clock_round_rate,
		.set_rate = cpg_sd_clock_set_rate,
		};

		static struct clk * __init cpg_sd_clk_register(const struct cpg_core_clk *core,
		void __iomem *base,
		const char *parent_name)
		{
		struct clk_init_data init;
		struct sd_clock *clock;
		struct clk *clk;
		unsigned int i;

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

		init.name = core->name;
		init.ops = &cpg_sd_clock_ops;
		init.flags = CLK_IS_BASIC \| CLK_SET_RATE_PARENT;
		init.parent_names = &parent_name;
		init.num_parents = 1;

		clock->reg = base + core->offset;
		clock->hw.init = &init;
		clock->div_table = cpg_sd_div_table;
		clock->div_num = ARRAY_SIZE(cpg_sd_div_table);

		clock->div_max = clock->div_table[0].div;
		clock->div_min = clock->div_max;
		for (i = 1; i < clock->div_num; i++) {
		clock->div_max = max(clock->div_max, clock->div_table[i].div);
		clock->div_min = min(clock->div_min, clock->div_table[i].div);
		}

		clk = clk_register(NULL, &clock->hw);
		if (IS_ERR(clk))
		kfree(clock);

		return clk;
		}


		static const struct rcar_gen3_cpg_pll_config *cpg_pll_config __initdata;
		static unsigned int cpg_clk_extalr __initdata;

		struct clk * __init rcar_gen3_cpg_clk_register(struct device *dev,
		const struct cpg_core_clk core, const struct cpg_mssr_info info,
		struct clk *clks, void __iomem base)
		{
		const struct clk *parent;
		unsigned int mult = 1;
		unsigned int div = 1;
		u32 value;

		parent = clks[core->parent];
		if (IS_ERR(parent))
		return ERR_CAST(parent);

		switch (core->type) {
		case CLK_TYPE_GEN3_MAIN:
		div = cpg_pll_config->extal_div;
		break;

		case CLK_TYPE_GEN3_PLL0:
		/*
		* PLL0 is a configurable multiplier clock. Register it as a
		* fixed factor clock for now as there's no generic multiplier
		* clock implementation and we currently have no need to change
		* the multiplier value.
		*/
		value = readl(base + CPG_PLL0CR);
		mult = (((value >> 24) & 0x7f) + 1) * 2;
		break;

		case CLK_TYPE_GEN3_PLL1:
		mult = cpg_pll_config->pll1_mult;
		break;

		case CLK_TYPE_GEN3_PLL2:
		/*
		* PLL2 is a configurable multiplier clock. Register it as a
		* fixed factor clock for now as there's no generic multiplier
		* clock implementation and we currently have no need to change
		* the multiplier value.
		*/
		value = readl(base + CPG_PLL2CR);
		mult = (((value >> 24) & 0x7f) + 1) * 2;
		break;

		case CLK_TYPE_GEN3_PLL3:
		mult = cpg_pll_config->pll3_mult;
		break;

		case CLK_TYPE_GEN3_PLL4:
		/*
		* PLL4 is a configurable multiplier clock. Register it as a
		* fixed factor clock for now as there's no generic multiplier
		* clock implementation and we currently have no need to change
		* the multiplier value.
		*/
		value = readl(base + CPG_PLL4CR);
		mult = (((value >> 24) & 0x7f) + 1) * 2;
		break;

		case CLK_TYPE_GEN3_SD:
		return cpg_sd_clk_register(core, base, __clk_get_name(parent));

		case CLK_TYPE_GEN3_R:
		/*
		* RINT is default.
		* Only if EXTALR is populated, we switch to it.
		*/
		value = readl(base + CPG_RCKCR) & 0x3f;

		if (clk_get_rate(clks[cpg_clk_extalr])) {
		parent = clks[cpg_clk_extalr];
		value \|= BIT(15);
		}

		writel(value, base + CPG_RCKCR);
		break;

		default:
		return ERR_PTR(-EINVAL);
		}

		return clk_register_fixed_factor(NULL, core->name,
		__clk_get_name(parent), 0, mult, div);
		}

		/*
		* Reset register definitions.
		*/
		#define MODEMR 0xe6160060

		u32 __init rcar_gen3_read_mode_pins(void)
		{
		void __iomem *modemr = ioremap_nocache(MODEMR, 4);
		u32 mode;

		BUG_ON(!modemr);
		mode = ioread32(modemr);
		iounmap(modemr);

		return mode;
		}

		int __init rcar_gen3_cpg_init(const struct rcar_gen3_cpg_pll_config *config,
		unsigned int clk_extalr)
		{
		cpg_pll_config = config;
		cpg_clk_extalr = clk_extalr;
		return 0;
		}

drivers/clk/renesas/rcar-gen3-cpg.h

0 → 100644

+43 −0

Original line number	Diff line number	Diff line
		/*
		* R-Car Gen3 Clock Pulse Generator
		*
		* Copyright (C) 2015-2016 Glider bvba
		*
		* 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; version 2 of the License.
		*/

		#ifndef __CLK_RENESAS_RCAR_GEN3_CPG_H__
		#define __CLK_RENESAS_RCAR_GEN3_CPG_H__

		enum rcar_gen3_clk_types {
		CLK_TYPE_GEN3_MAIN = CLK_TYPE_CUSTOM,
		CLK_TYPE_GEN3_PLL0,
		CLK_TYPE_GEN3_PLL1,
		CLK_TYPE_GEN3_PLL2,
		CLK_TYPE_GEN3_PLL3,
		CLK_TYPE_GEN3_PLL4,
		CLK_TYPE_GEN3_SD,
		CLK_TYPE_GEN3_R,
		};

		#define DEF_GEN3_SD(_name, _id, _parent, _offset) \
		DEF_BASE(_name, _id, CLK_TYPE_GEN3_SD, _parent, .offset = _offset)

		struct rcar_gen3_cpg_pll_config {
		unsigned int extal_div;
		unsigned int pll1_mult;
		unsigned int pll3_mult;
		};

		#define CPG_RCKCR 0x240

		u32 rcar_gen3_read_mode_pins(void);
		struct clk rcar_gen3_cpg_clk_register(struct device dev,
		const struct cpg_core_clk core, const struct cpg_mssr_info info,
		struct clk *clks, void __iomem base);
		int rcar_gen3_cpg_init(const struct rcar_gen3_cpg_pll_config *config,
		unsigned int clk_extalr);

		#endif

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