[CPUFREQ] Move ARM Samsung cpufreq drivers to drivers/cpufreq/

According to discussion of the ARM arch subsystem migration,
ARM cpufreq drivers move to drivers/cpufreq. So this patch
adds Kconfig.arm for ARM like x86 and adds Samsung S5PV210
and EXYNOS4210 cpufreq driver compile in there.
As a note, otherw will be moved.

Cc: Dave Jones <davej@redhat.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Dave Jones <davej@redhat.com>

2 files changed, 0 insertions, 570 deletions

diff --git a/arch/arm/mach-exynos4/Makefile b/arch/arm/mach-exynos4/Makefile
index 60fe5ecf359..1366995d8c2 100644
--- a/arch/arm/mach-exynos4/Makefile
+++ b/arch/arm/mach-exynos4/Makefile
@@ -15,7 +15,6 @@ obj-				:=
 obj-$(CONFIG_CPU_EXYNOS4210)	+= cpu.o init.o clock.o irq-combiner.o
 obj-$(CONFIG_CPU_EXYNOS4210)	+= setup-i2c0.o irq-eint.o dma.o
 obj-$(CONFIG_PM)		+= pm.o sleep.o
-obj-$(CONFIG_CPU_FREQ)		+= cpufreq.o
 obj-$(CONFIG_CPU_IDLE)		+= cpuidle.o
 
 obj-$(CONFIG_SMP)		+= platsmp.o headsmp.o
diff --git a/arch/arm/mach-exynos4/cpufreq.c b/arch/arm/mach-exynos4/cpufreq.c
deleted file mode 100644
index a1bd258f0c4..00000000000
--- a/arch/arm/mach-exynos4/cpufreq.c
+++ /dev/null
@@ -1,569 +0,0 @@
-/* linux/arch/arm/mach-exynos4/cpufreq.c
- *
- * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
- *		http://www.samsung.com
- *
- * EXYNOS4 - CPU frequency scaling support
- *
- * 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/types.h>
-#include <linux/kernel.h>
-#include <linux/err.h>
-#include <linux/clk.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-#include <linux/regulator/consumer.h>
-#include <linux/cpufreq.h>
-
-#include <mach/map.h>
-#include <mach/regs-clock.h>
-#include <mach/regs-mem.h>
-
-#include <plat/clock.h>
-#include <plat/pm.h>
-
-static struct clk *cpu_clk;
-static struct clk *moutcore;
-static struct clk *mout_mpll;
-static struct clk *mout_apll;
-
-static struct regulator *arm_regulator;
-static struct regulator *int_regulator;
-
-static struct cpufreq_freqs freqs;
-static unsigned int memtype;
-
-enum exynos4_memory_type {
-	DDR2 = 4,
-	LPDDR2,
-	DDR3,
-};
-
-enum cpufreq_level_index {
-	L0, L1, L2, L3, CPUFREQ_LEVEL_END,
-};
-
-static struct cpufreq_frequency_table exynos4_freq_table[] = {
-	{L0, 1000*1000},
-	{L1, 800*1000},
-	{L2, 400*1000},
-	{L3, 100*1000},
-	{0, CPUFREQ_TABLE_END},
-};
-
-static unsigned int clkdiv_cpu0[CPUFREQ_LEVEL_END][7] = {
-	/*
-	 * Clock divider value for following
-	 * { DIVCORE, DIVCOREM0, DIVCOREM1, DIVPERIPH,
-	 *		DIVATB, DIVPCLK_DBG, DIVAPLL }
-	 */
-
-	/* ARM L0: 1000MHz */
-	{ 0, 3, 7, 3, 3, 0, 1 },
-
-	/* ARM L1: 800MHz */
-	{ 0, 3, 7, 3, 3, 0, 1 },
-
-	/* ARM L2: 400MHz */
-	{ 0, 1, 3, 1, 3, 0, 1 },
-
-	/* ARM L3: 100MHz */
-	{ 0, 0, 1, 0, 3, 1, 1 },
-};
-
-static unsigned int clkdiv_cpu1[CPUFREQ_LEVEL_END][2] = {
-	/*
-	 * Clock divider value for following
-	 * { DIVCOPY, DIVHPM }
-	 */
-
-	 /* ARM L0: 1000MHz */
-	{ 3, 0 },
-
-	/* ARM L1: 800MHz */
-	{ 3, 0 },
-
-	/* ARM L2: 400MHz */
-	{ 3, 0 },
-
-	/* ARM L3: 100MHz */
-	{ 3, 0 },
-};
-
-static unsigned int clkdiv_dmc0[CPUFREQ_LEVEL_END][8] = {
-	/*
-	 * Clock divider value for following
-	 * { DIVACP, DIVACP_PCLK, DIVDPHY, DIVDMC, DIVDMCD
-	 *		DIVDMCP, DIVCOPY2, DIVCORE_TIMERS }
-	 */
-
-	/* DMC L0: 400MHz */
-	{ 3, 1, 1, 1, 1, 1, 3, 1 },
-
-	/* DMC L1: 400MHz */
-	{ 3, 1, 1, 1, 1, 1, 3, 1 },
-
-	/* DMC L2: 266.7MHz */
-	{ 7, 1, 1, 2, 1, 1, 3, 1 },
-
-	/* DMC L3: 200MHz */
-	{ 7, 1, 1, 3, 1, 1, 3, 1 },
-};
-
-static unsigned int clkdiv_top[CPUFREQ_LEVEL_END][5] = {
-	/*
-	 * Clock divider value for following
-	 * { DIVACLK200, DIVACLK100, DIVACLK160, DIVACLK133, DIVONENAND }
-	 */
-
-	/* ACLK200 L0: 200MHz */
-	{ 3, 7, 4, 5, 1 },
-
-	/* ACLK200 L1: 200MHz */
-	{ 3, 7, 4, 5, 1 },
-
-	/* ACLK200 L2: 160MHz */
-	{ 4, 7, 5, 7, 1 },
-
-	/* ACLK200 L3: 133.3MHz */
-	{ 5, 7, 7, 7, 1 },
-};
-
-static unsigned int clkdiv_lr_bus[CPUFREQ_LEVEL_END][2] = {
-	/*
-	 * Clock divider value for following
-	 * { DIVGDL/R, DIVGPL/R }
-	 */
-
-	/* ACLK_GDL/R L0: 200MHz */
-	{ 3, 1 },
-
-	/* ACLK_GDL/R L1: 200MHz */
-	{ 3, 1 },
-
-	/* ACLK_GDL/R L2: 160MHz */
-	{ 4, 1 },
-
-	/* ACLK_GDL/R L3: 133.3MHz */
-	{ 5, 1 },
-};
-
-struct cpufreq_voltage_table {
-	unsigned int	index;		/* any */
-	unsigned int	arm_volt;	/* uV */
-	unsigned int	int_volt;
-};
-
-static struct cpufreq_voltage_table exynos4_volt_table[CPUFREQ_LEVEL_END] = {
-	{
-		.index		= L0,
-		.arm_volt	= 1200000,
-		.int_volt	= 1100000,
-	}, {
-		.index		= L1,
-		.arm_volt	= 1100000,
-		.int_volt	= 1100000,
-	}, {
-		.index		= L2,
-		.arm_volt	= 1000000,
-		.int_volt	= 1000000,
-	}, {
-		.index		= L3,
-		.arm_volt	= 900000,
-		.int_volt	= 1000000,
-	},
-};
-
-static unsigned int exynos4_apll_pms_table[CPUFREQ_LEVEL_END] = {
-	/* APLL FOUT L0: 1000MHz */
-	((250 << 16) | (6 << 8) | 1),
-
-	/* APLL FOUT L1: 800MHz */
-	((200 << 16) | (6 << 8) | 1),
-
-	/* APLL FOUT L2 : 400MHz */
-	((200 << 16) | (6 << 8) | 2),
-
-	/* APLL FOUT L3: 100MHz */
-	((200 << 16) | (6 << 8) | 4),
-};
-
-int exynos4_verify_speed(struct cpufreq_policy *policy)
-{
-	return cpufreq_frequency_table_verify(policy, exynos4_freq_table);
-}
-
-unsigned int exynos4_getspeed(unsigned int cpu)
-{
-	return clk_get_rate(cpu_clk) / 1000;
-}
-
-void exynos4_set_clkdiv(unsigned int div_index)
-{
-	unsigned int tmp;
-
-	/* Change Divider - CPU0 */
-
-	tmp = __raw_readl(S5P_CLKDIV_CPU);
-
-	tmp &= ~(S5P_CLKDIV_CPU0_CORE_MASK | S5P_CLKDIV_CPU0_COREM0_MASK |
-		S5P_CLKDIV_CPU0_COREM1_MASK | S5P_CLKDIV_CPU0_PERIPH_MASK |
-		S5P_CLKDIV_CPU0_ATB_MASK | S5P_CLKDIV_CPU0_PCLKDBG_MASK |
-		S5P_CLKDIV_CPU0_APLL_MASK);
-
-	tmp |= ((clkdiv_cpu0[div_index][0] << S5P_CLKDIV_CPU0_CORE_SHIFT) |
-		(clkdiv_cpu0[div_index][1] << S5P_CLKDIV_CPU0_COREM0_SHIFT) |
-		(clkdiv_cpu0[div_index][2] << S5P_CLKDIV_CPU0_COREM1_SHIFT) |
-		(clkdiv_cpu0[div_index][3] << S5P_CLKDIV_CPU0_PERIPH_SHIFT) |
-		(clkdiv_cpu0[div_index][4] << S5P_CLKDIV_CPU0_ATB_SHIFT) |
-		(clkdiv_cpu0[div_index][5] << S5P_CLKDIV_CPU0_PCLKDBG_SHIFT) |
-		(clkdiv_cpu0[div_index][6] << S5P_CLKDIV_CPU0_APLL_SHIFT));
-
-	__raw_writel(tmp, S5P_CLKDIV_CPU);
-
-	do {
-		tmp = __raw_readl(S5P_CLKDIV_STATCPU);
-	} while (tmp & 0x1111111);
-
-	/* Change Divider - CPU1 */
-
-	tmp = __raw_readl(S5P_CLKDIV_CPU1);
-
-	tmp &= ~((0x7 << 4) | 0x7);
-
-	tmp |= ((clkdiv_cpu1[div_index][0] << 4) |
-		(clkdiv_cpu1[div_index][1] << 0));
-
-	__raw_writel(tmp, S5P_CLKDIV_CPU1);
-
-	do {
-		tmp = __raw_readl(S5P_CLKDIV_STATCPU1);
-	} while (tmp & 0x11);
-
-	/* Change Divider - DMC0 */
-
-	tmp = __raw_readl(S5P_CLKDIV_DMC0);
-
-	tmp &= ~(S5P_CLKDIV_DMC0_ACP_MASK | S5P_CLKDIV_DMC0_ACPPCLK_MASK |
-		S5P_CLKDIV_DMC0_DPHY_MASK | S5P_CLKDIV_DMC0_DMC_MASK |
-		S5P_CLKDIV_DMC0_DMCD_MASK | S5P_CLKDIV_DMC0_DMCP_MASK |
-		S5P_CLKDIV_DMC0_COPY2_MASK | S5P_CLKDIV_DMC0_CORETI_MASK);
-
-	tmp |= ((clkdiv_dmc0[div_index][0] << S5P_CLKDIV_DMC0_ACP_SHIFT) |
-		(clkdiv_dmc0[div_index][1] << S5P_CLKDIV_DMC0_ACPPCLK_SHIFT) |
-		(clkdiv_dmc0[div_index][2] << S5P_CLKDIV_DMC0_DPHY_SHIFT) |
-		(clkdiv_dmc0[div_index][3] << S5P_CLKDIV_DMC0_DMC_SHIFT) |
-		(clkdiv_dmc0[div_index][4] << S5P_CLKDIV_DMC0_DMCD_SHIFT) |
-		(clkdiv_dmc0[div_index][5] << S5P_CLKDIV_DMC0_DMCP_SHIFT) |
-		(clkdiv_dmc0[div_index][6] << S5P_CLKDIV_DMC0_COPY2_SHIFT) |
-		(clkdiv_dmc0[div_index][7] << S5P_CLKDIV_DMC0_CORETI_SHIFT));
-
-	__raw_writel(tmp, S5P_CLKDIV_DMC0);
-
-	do {
-		tmp = __raw_readl(S5P_CLKDIV_STAT_DMC0);
-	} while (tmp & 0x11111111);
-
-	/* Change Divider - TOP */
-
-	tmp = __raw_readl(S5P_CLKDIV_TOP);
-
-	tmp &= ~(S5P_CLKDIV_TOP_ACLK200_MASK | S5P_CLKDIV_TOP_ACLK100_MASK |
-		S5P_CLKDIV_TOP_ACLK160_MASK | S5P_CLKDIV_TOP_ACLK133_MASK |
-		S5P_CLKDIV_TOP_ONENAND_MASK);
-
-	tmp |= ((clkdiv_top[div_index][0] << S5P_CLKDIV_TOP_ACLK200_SHIFT) |
-		(clkdiv_top[div_index][1] << S5P_CLKDIV_TOP_ACLK100_SHIFT) |
-		(clkdiv_top[div_index][2] << S5P_CLKDIV_TOP_ACLK160_SHIFT) |
-		(clkdiv_top[div_index][3] << S5P_CLKDIV_TOP_ACLK133_SHIFT) |
-		(clkdiv_top[div_index][4] << S5P_CLKDIV_TOP_ONENAND_SHIFT));
-
-	__raw_writel(tmp, S5P_CLKDIV_TOP);
-
-	do {
-		tmp = __raw_readl(S5P_CLKDIV_STAT_TOP);
-	} while (tmp & 0x11111);
-
-	/* Change Divider - LEFTBUS */
-
-	tmp = __raw_readl(S5P_CLKDIV_LEFTBUS);
-
-	tmp &= ~(S5P_CLKDIV_BUS_GDLR_MASK | S5P_CLKDIV_BUS_GPLR_MASK);
-
-	tmp |= ((clkdiv_lr_bus[div_index][0] << S5P_CLKDIV_BUS_GDLR_SHIFT) |
-		(clkdiv_lr_bus[div_index][1] << S5P_CLKDIV_BUS_GPLR_SHIFT));
-
-	__raw_writel(tmp, S5P_CLKDIV_LEFTBUS);
-
-	do {
-		tmp = __raw_readl(S5P_CLKDIV_STAT_LEFTBUS);
-	} while (tmp & 0x11);
-
-	/* Change Divider - RIGHTBUS */
-
-	tmp = __raw_readl(S5P_CLKDIV_RIGHTBUS);
-
-	tmp &= ~(S5P_CLKDIV_BUS_GDLR_MASK | S5P_CLKDIV_BUS_GPLR_MASK);
-
-	tmp |= ((clkdiv_lr_bus[div_index][0] << S5P_CLKDIV_BUS_GDLR_SHIFT) |
-		(clkdiv_lr_bus[div_index][1] << S5P_CLKDIV_BUS_GPLR_SHIFT));
-
-	__raw_writel(tmp, S5P_CLKDIV_RIGHTBUS);
-
-	do {
-		tmp = __raw_readl(S5P_CLKDIV_STAT_RIGHTBUS);
-	} while (tmp & 0x11);
-}
-
-static void exynos4_set_apll(unsigned int index)
-{
-	unsigned int tmp;
-
-	/* 1. MUX_CORE_SEL = MPLL, ARMCLK uses MPLL for lock time */
-	clk_set_parent(moutcore, mout_mpll);
-
-	do {
-		tmp = (__raw_readl(S5P_CLKMUX_STATCPU)
-			>> S5P_CLKSRC_CPU_MUXCORE_SHIFT);
-		tmp &= 0x7;
-	} while (tmp != 0x2);
-
-	/* 2. Set APLL Lock time */
-	__raw_writel(S5P_APLL_LOCKTIME, S5P_APLL_LOCK);
-
-	/* 3. Change PLL PMS values */
-	tmp = __raw_readl(S5P_APLL_CON0);
-	tmp &= ~((0x3ff << 16) | (0x3f << 8) | (0x7 << 0));
-	tmp |= exynos4_apll_pms_table[index];
-	__raw_writel(tmp, S5P_APLL_CON0);
-
-	/* 4. wait_lock_time */
-	do {
-		tmp = __raw_readl(S5P_APLL_CON0);
-	} while (!(tmp & (0x1 << S5P_APLLCON0_LOCKED_SHIFT)));
-
-	/* 5. MUX_CORE_SEL = APLL */
-	clk_set_parent(moutcore, mout_apll);
-
-	do {
-		tmp = __raw_readl(S5P_CLKMUX_STATCPU);
-		tmp &= S5P_CLKMUX_STATCPU_MUXCORE_MASK;
-	} while (tmp != (0x1 << S5P_CLKSRC_CPU_MUXCORE_SHIFT));
-}
-
-static void exynos4_set_frequency(unsigned int old_index, unsigned int new_index)
-{
-	unsigned int tmp;
-
-	if (old_index > new_index) {
-		/* The frequency changing to L0 needs to change apll */
-		if (freqs.new == exynos4_freq_table[L0].frequency) {
-			/* 1. Change the system clock divider values */
-			exynos4_set_clkdiv(new_index);
-
-			/* 2. Change the apll m,p,s value */
-			exynos4_set_apll(new_index);
-		} else {
-			/* 1. Change the system clock divider values */
-			exynos4_set_clkdiv(new_index);
-
-			/* 2. Change just s value in apll m,p,s value */
-			tmp = __raw_readl(S5P_APLL_CON0);
-			tmp &= ~(0x7 << 0);
-			tmp |= (exynos4_apll_pms_table[new_index] & 0x7);
-			__raw_writel(tmp, S5P_APLL_CON0);
-		}
-	}
-
-	else if (old_index < new_index) {
-		/* The frequency changing from L0 needs to change apll */
-		if (freqs.old == exynos4_freq_table[L0].frequency) {
-			/* 1. Change the apll m,p,s value */
-			exynos4_set_apll(new_index);
-
-			/* 2. Change the system clock divider values */
-			exynos4_set_clkdiv(new_index);
-		} else {
-			/* 1. Change just s value in apll m,p,s value */
-			tmp = __raw_readl(S5P_APLL_CON0);
-			tmp &= ~(0x7 << 0);
-			tmp |= (exynos4_apll_pms_table[new_index] & 0x7);
-			__raw_writel(tmp, S5P_APLL_CON0);
-
-			/* 2. Change the system clock divider values */
-			exynos4_set_clkdiv(new_index);
-		}
-	}
-}
-
-static int exynos4_target(struct cpufreq_policy *policy,
-			  unsigned int target_freq,
-			  unsigned int relation)
-{
-	unsigned int index, old_index;
-	unsigned int arm_volt, int_volt;
-
-	freqs.old = exynos4_getspeed(policy->cpu);
-
-	if (cpufreq_frequency_table_target(policy, exynos4_freq_table,
-					   freqs.old, relation, &old_index))
-		return -EINVAL;
-
-	if (cpufreq_frequency_table_target(policy, exynos4_freq_table,
-					   target_freq, relation, &index))
-		return -EINVAL;
-
-	freqs.new = exynos4_freq_table[index].frequency;
-	freqs.cpu = policy->cpu;
-
-	if (freqs.new == freqs.old)
-		return 0;
-
-	/* get the voltage value */
-	arm_volt = exynos4_volt_table[index].arm_volt;
-	int_volt = exynos4_volt_table[index].int_volt;
-
-	cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
-
-	/* control regulator */
-	if (freqs.new > freqs.old) {
-		/* Voltage up */
-		regulator_set_voltage(arm_regulator, arm_volt, arm_volt);
-		regulator_set_voltage(int_regulator, int_volt, int_volt);
-	}
-
-	/* Clock Configuration Procedure */
-	exynos4_set_frequency(old_index, index);
-
-	/* control regulator */
-	if (freqs.new < freqs.old) {
-		/* Voltage down */
-		regulator_set_voltage(arm_regulator, arm_volt, arm_volt);
-		regulator_set_voltage(int_regulator, int_volt, int_volt);
-	}
-
-	cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
-
-	return 0;
-}
-
-#ifdef CONFIG_PM
-static int exynos4_cpufreq_suspend(struct cpufreq_policy *policy)
-{
-	return 0;
-}
-
-static int exynos4_cpufreq_resume(struct cpufreq_policy *policy)
-{
-	return 0;
-}
-#endif
-
-static int exynos4_cpufreq_cpu_init(struct cpufreq_policy *policy)
-{
-	policy->cur = policy->min = policy->max = exynos4_getspeed(policy->cpu);
-
-	cpufreq_frequency_table_get_attr(exynos4_freq_table, policy->cpu);
-
-	/* set the transition latency value */
-	policy->cpuinfo.transition_latency = 100000;
-
-	/*
-	 * EXYNOS4 multi-core processors has 2 cores
-	 * that the frequency cannot be set independently.
-	 * Each cpu is bound to the same speed.
-	 * So the affected cpu is all of the cpus.
-	 */
-	cpumask_setall(policy->cpus);
-
-	return cpufreq_frequency_table_cpuinfo(policy, exynos4_freq_table);
-}
-
-static struct cpufreq_driver exynos4_driver = {
-	.flags		= CPUFREQ_STICKY,
-	.verify		= exynos4_verify_speed,
-	.target		= exynos4_target,
-	.get		= exynos4_getspeed,
-	.init		= exynos4_cpufreq_cpu_init,
-	.name		= "exynos4_cpufreq",
-#ifdef CONFIG_PM
-	.suspend	= exynos4_cpufreq_suspend,
-	.resume		= exynos4_cpufreq_resume,
-#endif
-};
-
-static int __init exynos4_cpufreq_init(void)
-{
-	cpu_clk = clk_get(NULL, "armclk");
-	if (IS_ERR(cpu_clk))
-		return PTR_ERR(cpu_clk);
-
-	moutcore = clk_get(NULL, "moutcore");
-	if (IS_ERR(moutcore))
-		goto out;
-
-	mout_mpll = clk_get(NULL, "mout_mpll");
-	if (IS_ERR(mout_mpll))
-		goto out;
-
-	mout_apll = clk_get(NULL, "mout_apll");
-	if (IS_ERR(mout_apll))
-		goto out;
-
-	arm_regulator = regulator_get(NULL, "vdd_arm");
-	if (IS_ERR(arm_regulator)) {
-		printk(KERN_ERR "failed to get resource %s\n", "vdd_arm");
-		goto out;
-	}
-
-	int_regulator = regulator_get(NULL, "vdd_int");
-	if (IS_ERR(int_regulator)) {
-		printk(KERN_ERR "failed to get resource %s\n", "vdd_int");
-		goto out;
-	}
-
-	/*
-	 * Check DRAM type.
-	 * Because DVFS level is different according to DRAM type.
-	 */
-	memtype = __raw_readl(S5P_VA_DMC0 + S5P_DMC0_MEMCON_OFFSET);
-	memtype = (memtype >> S5P_DMC0_MEMTYPE_SHIFT);
-	memtype &= S5P_DMC0_MEMTYPE_MASK;
-
-	if ((memtype < DDR2) && (memtype > DDR3)) {
-		printk(KERN_ERR "%s: wrong memtype= 0x%x\n", __func__, memtype);
-		goto out;
-	} else {
-		printk(KERN_DEBUG "%s: memtype= 0x%x\n", __func__, memtype);
-	}
-
-	return cpufreq_register_driver(&exynos4_driver);
-
-out:
-	if (!IS_ERR(cpu_clk))
-		clk_put(cpu_clk);
-
-	if (!IS_ERR(moutcore))
-		clk_put(moutcore);
-
-	if (!IS_ERR(mout_mpll))
-		clk_put(mout_mpll);
-
-	if (!IS_ERR(mout_apll))
-		clk_put(mout_apll);
-
-	if (!IS_ERR(arm_regulator))
-		regulator_put(arm_regulator);
-
-	if (!IS_ERR(int_regulator))
-		regulator_put(int_regulator);
-
-	printk(KERN_ERR "%s: failed initialization\n", __func__);
-
-	return -EINVAL;
-}
-late_initcall(exynos4_cpufreq_init);