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authorLinus Torvalds2011-07-24 20:56:18 -0700
committerLinus Torvalds2011-07-24 20:56:18 -0700
commit8405b044e5238afebd7248d927c1d261d2239767 (patch)
tree56c6a3c1a4542ead63b4abdd9fe6629d849402d5 /arch
parentee05eff6f79c25617e5b7d7677b8f79d26abbe37 (diff)
parent133de1211982bd2ba9ab401f7a73d25d052ccd61 (diff)
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq: [CPUFREQ] s5pv210: make needlessly global symbols static [CPUFREQ] exynos4210: make needlessly global symbols static [CPUFREQ] S3C6410: Add some lower frequencies for 800MHz base clock operation [CPUFREQ] S5PV210: Add reboot notifier to prevent system hang [CPUFREQ] S5PV210: Adjust udelay prior to voltage scaling down [CPUFREQ] S5PV210: Lock a mutex while changing the cpu frequency [CPUFREQ] S5PV210: Add pm_notifier to prevent system unstable [CPUFREQ] S5PV210: Add arm/int voltage control support [CPUFREQ] S5PV210: Add additional symantics for "relation" in cpufreq with pm [CPUFREQ] S3C64xx: Notify transition complete as soon as frequency changed [CPUFREQ] S3C6410: Support 800MHz operation in cpufreq [CPUFREQ] s5pv210-cpufreq.c: Add missing clk_put [CPUFREQ] Move compile for S3C64XX cpufreq to /drivers/cpufreq [CPUFREQ] Remove some vi noise that escaped into the Makefile. [CPUFREQ] Move ARM Samsung cpufreq drivers to drivers/cpufreq/ [CPUFREQ/S3C64xx] Move S3C64xx CPUfreq driver into drivers/cpufreq [CPUFREQ] Handle CPUs with different capabilities in acpi-cpufreq
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/Kconfig4
-rw-r--r--arch/arm/mach-exynos4/Makefile1
-rw-r--r--arch/arm/mach-exynos4/cpufreq.c569
-rw-r--r--arch/arm/mach-s3c64xx/Makefile4
-rw-r--r--arch/arm/mach-s3c64xx/cpufreq.c270
-rw-r--r--arch/arm/mach-s5pv210/Makefile1
-rw-r--r--arch/arm/mach-s5pv210/cpufreq.c485
7 files changed, 0 insertions, 1334 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 1478c6171b00..83a7aa2ca57a 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1895,10 +1895,6 @@ config CPU_FREQ_PXA
default y
select CPU_FREQ_DEFAULT_GOV_USERSPACE
-config CPU_FREQ_S3C64XX
- bool "CPUfreq support for Samsung S3C64XX CPUs"
- depends on CPU_FREQ && CPU_S3C6410
-
config CPU_FREQ_S3C
bool
help
diff --git a/arch/arm/mach-exynos4/Makefile b/arch/arm/mach-exynos4/Makefile
index 60fe5ecf3599..1366995d8c2c 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 a1bd258f0c4d..000000000000
--- 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);
diff --git a/arch/arm/mach-s3c64xx/Makefile b/arch/arm/mach-s3c64xx/Makefile
index 4657363f0674..f5a7144a052f 100644
--- a/arch/arm/mach-s3c64xx/Makefile
+++ b/arch/arm/mach-s3c64xx/Makefile
@@ -23,10 +23,6 @@ obj-$(CONFIG_CPU_S3C6410) += s3c6410.o
obj-y += irq.o
obj-y += irq-eint.o
-# CPU frequency scaling
-
-obj-$(CONFIG_CPU_FREQ_S3C64XX) += cpufreq.o
-
# DMA support
obj-$(CONFIG_S3C64XX_DMA) += dma.o
diff --git a/arch/arm/mach-s3c64xx/cpufreq.c b/arch/arm/mach-s3c64xx/cpufreq.c
deleted file mode 100644
index 4375b97588b8..000000000000
--- a/arch/arm/mach-s3c64xx/cpufreq.c
+++ /dev/null
@@ -1,270 +0,0 @@
-/* linux/arch/arm/plat-s3c64xx/cpufreq.c
- *
- * Copyright 2009 Wolfson Microelectronics plc
- *
- * S3C64xx CPUfreq 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/kernel.h>
-#include <linux/types.h>
-#include <linux/init.h>
-#include <linux/cpufreq.h>
-#include <linux/clk.h>
-#include <linux/err.h>
-#include <linux/regulator/consumer.h>
-
-static struct clk *armclk;
-static struct regulator *vddarm;
-static unsigned long regulator_latency;
-
-#ifdef CONFIG_CPU_S3C6410
-struct s3c64xx_dvfs {
- unsigned int vddarm_min;
- unsigned int vddarm_max;
-};
-
-static struct s3c64xx_dvfs s3c64xx_dvfs_table[] = {
- [0] = { 1000000, 1150000 },
- [1] = { 1050000, 1150000 },
- [2] = { 1100000, 1150000 },
- [3] = { 1200000, 1350000 },
-};
-
-static struct cpufreq_frequency_table s3c64xx_freq_table[] = {
- { 0, 66000 },
- { 0, 133000 },
- { 1, 222000 },
- { 1, 266000 },
- { 2, 333000 },
- { 2, 400000 },
- { 2, 532000 },
- { 2, 533000 },
- { 3, 667000 },
- { 0, CPUFREQ_TABLE_END },
-};
-#endif
-
-static int s3c64xx_cpufreq_verify_speed(struct cpufreq_policy *policy)
-{
- if (policy->cpu != 0)
- return -EINVAL;
-
- return cpufreq_frequency_table_verify(policy, s3c64xx_freq_table);
-}
-
-static unsigned int s3c64xx_cpufreq_get_speed(unsigned int cpu)
-{
- if (cpu != 0)
- return 0;
-
- return clk_get_rate(armclk) / 1000;
-}
-
-static int s3c64xx_cpufreq_set_target(struct cpufreq_policy *policy,
- unsigned int target_freq,
- unsigned int relation)
-{
- int ret;
- unsigned int i;
- struct cpufreq_freqs freqs;
- struct s3c64xx_dvfs *dvfs;
-
- ret = cpufreq_frequency_table_target(policy, s3c64xx_freq_table,
- target_freq, relation, &i);
- if (ret != 0)
- return ret;
-
- freqs.cpu = 0;
- freqs.old = clk_get_rate(armclk) / 1000;
- freqs.new = s3c64xx_freq_table[i].frequency;
- freqs.flags = 0;
- dvfs = &s3c64xx_dvfs_table[s3c64xx_freq_table[i].index];
-
- if (freqs.old == freqs.new)
- return 0;
-
- pr_debug("cpufreq: Transition %d-%dkHz\n", freqs.old, freqs.new);
-
- cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
-
-#ifdef CONFIG_REGULATOR
- if (vddarm && freqs.new > freqs.old) {
- ret = regulator_set_voltage(vddarm,
- dvfs->vddarm_min,
- dvfs->vddarm_max);
- if (ret != 0) {
- pr_err("cpufreq: Failed to set VDDARM for %dkHz: %d\n",
- freqs.new, ret);
- goto err;
- }
- }
-#endif
-
- ret = clk_set_rate(armclk, freqs.new * 1000);
- if (ret < 0) {
- pr_err("cpufreq: Failed to set rate %dkHz: %d\n",
- freqs.new, ret);
- goto err;
- }
-
-#ifdef CONFIG_REGULATOR
- if (vddarm && freqs.new < freqs.old) {
- ret = regulator_set_voltage(vddarm,
- dvfs->vddarm_min,
- dvfs->vddarm_max);
- if (ret != 0) {
- pr_err("cpufreq: Failed to set VDDARM for %dkHz: %d\n",
- freqs.new, ret);
- goto err_clk;
- }
- }
-#endif
-
- cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
-
- pr_debug("cpufreq: Set actual frequency %lukHz\n",
- clk_get_rate(armclk) / 1000);
-
- return 0;
-
-err_clk:
- if (clk_set_rate(armclk, freqs.old * 1000) < 0)
- pr_err("Failed to restore original clock rate\n");
-err:
- cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
-
- return ret;
-}
-
-#ifdef CONFIG_REGULATOR
-static void __init s3c64xx_cpufreq_config_regulator(void)
-{
- int count, v, i, found;
- struct cpufreq_frequency_table *freq;
- struct s3c64xx_dvfs *dvfs;
-
- count = regulator_count_voltages(vddarm);
- if (count < 0) {
- pr_err("cpufreq: Unable to check supported voltages\n");
- }
-
- freq = s3c64xx_freq_table;
- while (count > 0 && freq->frequency != CPUFREQ_TABLE_END) {
- if (freq->frequency == CPUFREQ_ENTRY_INVALID)
- continue;
-
- dvfs = &s3c64xx_dvfs_table[freq->index];
- found = 0;
-
- for (i = 0; i < count; i++) {
- v = regulator_list_voltage(vddarm, i);
- if (v >= dvfs->vddarm_min && v <= dvfs->vddarm_max)
- found = 1;
- }
-
- if (!found) {
- pr_debug("cpufreq: %dkHz unsupported by regulator\n",
- freq->frequency);
- freq->frequency = CPUFREQ_ENTRY_INVALID;
- }
-
- freq++;
- }
-
- /* Guess based on having to do an I2C/SPI write; in future we
- * will be able to query the regulator performance here. */
- regulator_latency = 1 * 1000 * 1000;
-}
-#endif
-
-static int s3c64xx_cpufreq_driver_init(struct cpufreq_policy *policy)
-{
- int ret;
- struct cpufreq_frequency_table *freq;
-
- if (policy->cpu != 0)
- return -EINVAL;
-
- if (s3c64xx_freq_table == NULL) {
- pr_err("cpufreq: No frequency information for this CPU\n");
- return -ENODEV;
- }
-
- armclk = clk_get(NULL, "armclk");
- if (IS_ERR(armclk)) {
- pr_err("cpufreq: Unable to obtain ARMCLK: %ld\n",
- PTR_ERR(armclk));
- return PTR_ERR(armclk);
- }
-
-#ifdef CONFIG_REGULATOR
- vddarm = regulator_get(NULL, "vddarm");
- if (IS_ERR(vddarm)) {
- ret = PTR_ERR(vddarm);
- pr_err("cpufreq: Failed to obtain VDDARM: %d\n", ret);
- pr_err("cpufreq: Only frequency scaling available\n");
- vddarm = NULL;
- } else {
- s3c64xx_cpufreq_config_regulator();
- }
-#endif
-
- freq = s3c64xx_freq_table;
- while (freq->frequency != CPUFREQ_TABLE_END) {
- unsigned long r;
-
- /* Check for frequencies we can generate */
- r = clk_round_rate(armclk, freq->frequency * 1000);
- r /= 1000;
- if (r != freq->frequency) {
- pr_debug("cpufreq: %dkHz unsupported by clock\n",
- freq->frequency);
- freq->frequency = CPUFREQ_ENTRY_INVALID;
- }
-
- /* If we have no regulator then assume startup
- * frequency is the maximum we can support. */
- if (!vddarm && freq->frequency > s3c64xx_cpufreq_get_speed(0))
- freq->frequency = CPUFREQ_ENTRY_INVALID;
-
- freq++;
- }
-
- policy->cur = clk_get_rate(armclk) / 1000;
-
- /* Datasheet says PLL stabalisation time (if we were to use
- * the PLLs, which we don't currently) is ~300us worst case,
- * but add some fudge.
- */
- policy->cpuinfo.transition_latency = (500 * 1000) + regulator_latency;
-
- ret = cpufreq_frequency_table_cpuinfo(policy, s3c64xx_freq_table);
- if (ret != 0) {
- pr_err("cpufreq: Failed to configure frequency table: %d\n",
- ret);
- regulator_put(vddarm);
- clk_put(armclk);
- }
-
- return ret;
-}
-
-static struct cpufreq_driver s3c64xx_cpufreq_driver = {
- .owner = THIS_MODULE,
- .flags = 0,
- .verify = s3c64xx_cpufreq_verify_speed,
- .target = s3c64xx_cpufreq_set_target,
- .get = s3c64xx_cpufreq_get_speed,
- .init = s3c64xx_cpufreq_driver_init,
- .name = "s3c",
-};
-
-static int __init s3c64xx_cpufreq_init(void)
-{
- return cpufreq_register_driver(&s3c64xx_cpufreq_driver);
-}
-module_init(s3c64xx_cpufreq_init);
diff --git a/arch/arm/mach-s5pv210/Makefile b/arch/arm/mach-s5pv210/Makefile
index 50907aca006c..599a3c0e8f6c 100644
--- a/arch/arm/mach-s5pv210/Makefile
+++ b/arch/arm/mach-s5pv210/Makefile
@@ -15,7 +15,6 @@ obj- :=
obj-$(CONFIG_CPU_S5PV210) += cpu.o init.o clock.o dma.o
obj-$(CONFIG_CPU_S5PV210) += setup-i2c0.o
obj-$(CONFIG_S5PV210_PM) += pm.o sleep.o
-obj-$(CONFIG_CPU_FREQ) += cpufreq.o
# machine support
diff --git a/arch/arm/mach-s5pv210/cpufreq.c b/arch/arm/mach-s5pv210/cpufreq.c
deleted file mode 100644
index 153af8b359ec..000000000000
--- a/arch/arm/mach-s5pv210/cpufreq.c
+++ /dev/null
@@ -1,485 +0,0 @@
-/* linux/arch/arm/mach-s5pv210/cpufreq.c
- *
- * Copyright (c) 2010 Samsung Electronics Co., Ltd.
- * http://www.samsung.com
- *
- * CPU frequency scaling for S5PC110/S5PV210
- *
- * 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/init.h>
-#include <linux/err.h>
-#include <linux/clk.h>
-#include <linux/io.h>
-#include <linux/cpufreq.h>
-
-#include <mach/map.h>
-#include <mach/regs-clock.h>
-
-static struct clk *cpu_clk;
-static struct clk *dmc0_clk;
-static struct clk *dmc1_clk;
-static struct cpufreq_freqs freqs;
-
-/* APLL M,P,S values for 1G/800Mhz */
-#define APLL_VAL_1000 ((1 << 31) | (125 << 16) | (3 << 8) | 1)
-#define APLL_VAL_800 ((1 << 31) | (100 << 16) | (3 << 8) | 1)
-
-/*
- * DRAM configurations to calculate refresh counter for changing
- * frequency of memory.
- */
-struct dram_conf {
- unsigned long freq; /* HZ */
- unsigned long refresh; /* DRAM refresh counter * 1000 */
-};
-
-/* DRAM configuration (DMC0 and DMC1) */
-static struct dram_conf s5pv210_dram_conf[2];
-
-enum perf_level {
- L0, L1, L2, L3, L4,
-};
-
-enum s5pv210_mem_type {
- LPDDR = 0x1,
- LPDDR2 = 0x2,
- DDR2 = 0x4,
-};
-
-enum s5pv210_dmc_port {
- DMC0 = 0,
- DMC1,
-};
-
-static struct cpufreq_frequency_table s5pv210_freq_table[] = {
- {L0, 1000*1000},
- {L1, 800*1000},
- {L2, 400*1000},
- {L3, 200*1000},
- {L4, 100*1000},
- {0, CPUFREQ_TABLE_END},
-};
-
-static u32 clkdiv_val[5][11] = {
- /*
- * Clock divider value for following
- * { APLL, A2M, HCLK_MSYS, PCLK_MSYS,
- * HCLK_DSYS, PCLK_DSYS, HCLK_PSYS, PCLK_PSYS,
- * ONEDRAM, MFC, G3D }
- */
-
- /* L0 : [1000/200/100][166/83][133/66][200/200] */
- {0, 4, 4, 1, 3, 1, 4, 1, 3, 0, 0},
-
- /* L1 : [800/200/100][166/83][133/66][200/200] */
- {0, 3, 3, 1, 3, 1, 4, 1, 3, 0, 0},
-
- /* L2 : [400/200/100][166/83][133/66][200/200] */
- {1, 3, 1, 1, 3, 1, 4, 1, 3, 0, 0},
-
- /* L3 : [200/200/100][166/83][133/66][200/200] */
- {3, 3, 1, 1, 3, 1, 4, 1, 3, 0, 0},
-
- /* L4 : [100/100/100][83/83][66/66][100/100] */
- {7, 7, 0, 0, 7, 0, 9, 0, 7, 0, 0},
-};
-
-/*
- * This function set DRAM refresh counter
- * accoriding to operating frequency of DRAM
- * ch: DMC port number 0 or 1
- * freq: Operating frequency of DRAM(KHz)
- */
-static void s5pv210_set_refresh(enum s5pv210_dmc_port ch, unsigned long freq)
-{
- unsigned long tmp, tmp1;
- void __iomem *reg = NULL;
-
- if (ch == DMC0) {
- reg = (S5P_VA_DMC0 + 0x30);
- } else if (ch == DMC1) {
- reg = (S5P_VA_DMC1 + 0x30);
- } else {
- printk(KERN_ERR "Cannot find DMC port\n");
- return;
- }
-
- /* Find current DRAM frequency */
- tmp = s5pv210_dram_conf[ch].freq;
-
- do_div(tmp, freq);
-
- tmp1 = s5pv210_dram_conf[ch].refresh;
-
- do_div(tmp1, tmp);
-
- __raw_writel(tmp1, reg);
-}
-
-int s5pv210_verify_speed(struct cpufreq_policy *policy)
-{
- if (policy->cpu)
- return -EINVAL;
-
- return cpufreq_frequency_table_verify(policy, s5pv210_freq_table);
-}
-
-unsigned int s5pv210_getspeed(unsigned int cpu)
-{
- if (cpu)
- return 0;
-
- return clk_get_rate(cpu_clk) / 1000;
-}
-
-static int s5pv210_target(struct cpufreq_policy *policy,
- unsigned int target_freq,
- unsigned int relation)
-{
- unsigned long reg;
- unsigned int index, priv_index;
- unsigned int pll_changing = 0;
- unsigned int bus_speed_changing = 0;
-
- freqs.old = s5pv210_getspeed(0);
-
- if (cpufreq_frequency_table_target(policy, s5pv210_freq_table,
- target_freq, relation, &index))
- return -EINVAL;
-
- freqs.new = s5pv210_freq_table[index].frequency;
- freqs.cpu = 0;
-
- if (freqs.new == freqs.old)
- return 0;
-
- /* Finding current running level index */
- if (cpufreq_frequency_table_target(policy, s5pv210_freq_table,
- freqs.old, relation, &priv_index))
- return -EINVAL;
-
- cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
-
- if (freqs.new > freqs.old) {
- /* Voltage up: will be implemented */
- }
-
- /* Check if there need to change PLL */
- if ((index == L0) || (priv_index == L0))
- pll_changing = 1;
-
- /* Check if there need to change System bus clock */
- if ((index == L4) || (priv_index == L4))
- bus_speed_changing = 1;
-
- if (bus_speed_changing) {
- /*
- * Reconfigure DRAM refresh counter value for minimum
- * temporary clock while changing divider.
- * expected clock is 83Mhz : 7.8usec/(1/83Mhz) = 0x287
- */
- if (pll_changing)
- s5pv210_set_refresh(DMC1, 83000);
- else
- s5pv210_set_refresh(DMC1, 100000);
-
- s5pv210_set_refresh(DMC0, 83000);
- }
-
- /*
- * APLL should be changed in this level
- * APLL -> MPLL(for stable transition) -> APLL
- * Some clock source's clock API are not prepared.
- * Do not use clock API in below code.
- */
- if (pll_changing) {
- /*
- * 1. Temporary Change divider for MFC and G3D
- * SCLKA2M(200/1=200)->(200/4=50)Mhz
- */
- reg = __raw_readl(S5P_CLK_DIV2);
- reg &= ~(S5P_CLKDIV2_G3D_MASK | S5P_CLKDIV2_MFC_MASK);
- reg |= (3 << S5P_CLKDIV2_G3D_SHIFT) |
- (3 << S5P_CLKDIV2_MFC_SHIFT);
- __raw_writel(reg, S5P_CLK_DIV2);
-
- /* For MFC, G3D dividing */
- do {
- reg = __raw_readl(S5P_CLKDIV_STAT0);
- } while (reg & ((1 << 16) | (1 << 17)));
-
- /*
- * 2. Change SCLKA2M(200Mhz)to SCLKMPLL in MFC_MUX, G3D MUX
- * (200/4=50)->(667/4=166)Mhz
- */
- reg = __raw_readl(S5P_CLK_SRC2);
- reg &= ~(S5P_CLKSRC2_G3D_MASK | S5P_CLKSRC2_MFC_MASK);
- reg |= (1 << S5P_CLKSRC2_G3D_SHIFT) |
- (1 << S5P_CLKSRC2_MFC_SHIFT);
- __raw_writel(reg, S5P_CLK_SRC2);
-
- do {
- reg = __raw_readl(S5P_CLKMUX_STAT1);
- } while (reg & ((1 << 7) | (1 << 3)));
-
- /*
- * 3. DMC1 refresh count for 133Mhz if (index == L4) is
- * true refresh counter is already programed in upper
- * code. 0x287@83Mhz
- */
- if (!bus_speed_changing)
- s5pv210_set_refresh(DMC1, 133000);
-
- /* 4. SCLKAPLL -> SCLKMPLL */
- reg = __raw_readl(S5P_CLK_SRC0);
- reg &= ~(S5P_CLKSRC0_MUX200_MASK);
- reg |= (0x1 << S5P_CLKSRC0_MUX200_SHIFT);
- __raw_writel(reg, S5P_CLK_SRC0);
-
- do {
- reg = __raw_readl(S5P_CLKMUX_STAT0);
- } while (reg & (0x1 << 18));
-
- }
-
- /* Change divider */
- reg = __raw_readl(S5P_CLK_DIV0);
-
- reg &= ~(S5P_CLKDIV0_APLL_MASK | S5P_CLKDIV0_A2M_MASK |
- S5P_CLKDIV0_HCLK200_MASK | S5P_CLKDIV0_PCLK100_MASK |
- S5P_CLKDIV0_HCLK166_MASK | S5P_CLKDIV0_PCLK83_MASK |
- S5P_CLKDIV0_HCLK133_MASK | S5P_CLKDIV0_PCLK66_MASK);
-
- reg |= ((clkdiv_val[index][0] << S5P_CLKDIV0_APLL_SHIFT) |
- (clkdiv_val[index][1] << S5P_CLKDIV0_A2M_SHIFT) |
- (clkdiv_val[index][2] << S5P_CLKDIV0_HCLK200_SHIFT) |
- (clkdiv_val[index][3] << S5P_CLKDIV0_PCLK100_SHIFT) |
- (clkdiv_val[index][4] << S5P_CLKDIV0_HCLK166_SHIFT) |
- (clkdiv_val[index][5] << S5P_CLKDIV0_PCLK83_SHIFT) |
- (clkdiv_val[index][6] << S5P_CLKDIV0_HCLK133_SHIFT) |
- (clkdiv_val[index][7] << S5P_CLKDIV0_PCLK66_SHIFT));
-
- __raw_writel(reg, S5P_CLK_DIV0);
-
- do {
- reg = __raw_readl(S5P_CLKDIV_STAT0);
- } while (reg & 0xff);
-
- /* ARM MCS value changed */
- reg = __raw_readl(S5P_ARM_MCS_CON);
- reg &= ~0x3;
- if (index >= L3)
- reg |= 0x3;
- else
- reg |= 0x1;
-
- __raw_writel(reg, S5P_ARM_MCS_CON);
-
- if (pll_changing) {
- /* 5. Set Lock time = 30us*24Mhz = 0x2cf */
- __raw_writel(0x2cf, S5P_APLL_LOCK);
-
- /*
- * 6. Turn on APLL
- * 6-1. Set PMS values
- * 6-2. Wait untile the PLL is locked
- */
- if (index == L0)
- __raw_writel(APLL_VAL_1000, S5P_APLL_CON);
- else
- __raw_writel(APLL_VAL_800, S5P_APLL_CON);
-
- do {
- reg = __raw_readl(S5P_APLL_CON);
- } while (!(reg & (0x1 << 29)));
-
- /*
- * 7. Change souce clock from SCLKMPLL(667Mhz)
- * to SCLKA2M(200Mhz) in MFC_MUX and G3D MUX
- * (667/4=166)->(200/4=50)Mhz
- */
- reg = __raw_readl(S5P_CLK_SRC2);
- reg &= ~(S5P_CLKSRC2_G3D_MASK | S5P_CLKSRC2_MFC_MASK);
- reg |= (0 << S5P_CLKSRC2_G3D_SHIFT) |
- (0 << S5P_CLKSRC2_MFC_SHIFT);
- __raw_writel(reg, S5P_CLK_SRC2);
-
- do {
- reg = __raw_readl(S5P_CLKMUX_STAT1);
- } while (reg & ((1 << 7) | (1 << 3)));
-
- /*
- * 8. Change divider for MFC and G3D
- * (200/4=50)->(200/1=200)Mhz
- */
- reg = __raw_readl(S5P_CLK_DIV2);
- reg &= ~(S5P_CLKDIV2_G3D_MASK | S5P_CLKDIV2_MFC_MASK);
- reg |= (clkdiv_val[index][10] << S5P_CLKDIV2_G3D_SHIFT) |
- (clkdiv_val[index][9] << S5P_CLKDIV2_MFC_SHIFT);
- __raw_writel(reg, S5P_CLK_DIV2);
-
- /* For MFC, G3D dividing */
- do {
- reg = __raw_readl(S5P_CLKDIV_STAT0);
- } while (reg & ((1 << 16) | (1 << 17)));
-
- /* 9. Change MPLL to APLL in MSYS_MUX */
- reg = __raw_readl(S5P_CLK_SRC0);
- reg &= ~(S5P_CLKSRC0_MUX200_MASK);
- reg |= (0x0 << S5P_CLKSRC0_MUX200_SHIFT);
- __raw_writel(reg, S5P_CLK_SRC0);
-
- do {
- reg = __raw_readl(S5P_CLKMUX_STAT0);
- } while (reg & (0x1 << 18));
-
- /*
- * 10. DMC1 refresh counter
- * L4 : DMC1 = 100Mhz 7.8us/(1/100) = 0x30c
- * Others : DMC1 = 200Mhz 7.8us/(1/200) = 0x618
- */
- if (!bus_speed_changing)
- s5pv210_set_refresh(DMC1, 200000);
- }
-
- /*
- * L4 level need to change memory bus speed, hence onedram clock divier
- * and memory refresh parameter should be changed
- */
- if (bus_speed_changing) {
- reg = __raw_readl(S5P_CLK_DIV6);
- reg &= ~S5P_CLKDIV6_ONEDRAM_MASK;
- reg |= (clkdiv_val[index][8] << S5P_CLKDIV6_ONEDRAM_SHIFT);
- __raw_writel(reg, S5P_CLK_DIV6);
-
- do {
- reg = __raw_readl(S5P_CLKDIV_STAT1);
- } while (reg & (1 << 15));
-
- /* Reconfigure DRAM refresh counter value */
- if (index != L4) {
- /*
- * DMC0 : 166Mhz
- * DMC1 : 200Mhz
- */
- s5pv210_set_refresh(DMC0, 166000);
- s5pv210_set_refresh(DMC1, 200000);
- } else {
- /*
- * DMC0 : 83Mhz
- * DMC1 : 100Mhz
- */
- s5pv210_set_refresh(DMC0, 83000);
- s5pv210_set_refresh(DMC1, 100000);
- }
- }
-
- if (freqs.new < freqs.old) {
- /* Voltage down: will be implemented */
- }
-
- cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
-
- printk(KERN_DEBUG "Perf changed[L%d]\n", index);
-
- return 0;
-}
-
-#ifdef CONFIG_PM
-static int s5pv210_cpufreq_suspend(struct cpufreq_policy *policy)
-{
- return 0;
-}
-
-static int s5pv210_cpufreq_resume(struct cpufreq_policy *policy)
-{
- return 0;
-}
-#endif
-
-static int check_mem_type(void __iomem *dmc_reg)
-{
- unsigned long val;
-
- val = __raw_readl(dmc_reg + 0x4);
- val = (val & (0xf << 8));
-
- return val >> 8;
-}
-
-static int __init s5pv210_cpu_init(struct cpufreq_policy *policy)
-{
- unsigned long mem_type;
-
- cpu_clk = clk_get(NULL, "armclk");
- if (IS_ERR(cpu_clk))
- return PTR_ERR(cpu_clk);
-
- dmc0_clk = clk_get(NULL, "sclk_dmc0");
- if (IS_ERR(dmc0_clk)) {
- clk_put(cpu_clk);
- return PTR_ERR(dmc0_clk);
- }
-
- dmc1_clk = clk_get(NULL, "hclk_msys");
- if (IS_ERR(dmc1_clk)) {
- clk_put(dmc0_clk);
- clk_put(cpu_clk);
- return PTR_ERR(dmc1_clk);
- }
-
- if (policy->cpu != 0)
- return -EINVAL;
-
- /*
- * check_mem_type : This driver only support LPDDR & LPDDR2.
- * other memory type is not supported.
- */
- mem_type = check_mem_type(S5P_VA_DMC0);
-
- if ((mem_type != LPDDR) && (mem_type != LPDDR2)) {
- printk(KERN_ERR "CPUFreq doesn't support this memory type\n");
- return -EINVAL;
- }
-
- /* Find current refresh counter and frequency each DMC */
- s5pv210_dram_conf[0].refresh = (__raw_readl(S5P_VA_DMC0 + 0x30) * 1000);
- s5pv210_dram_conf[0].freq = clk_get_rate(dmc0_clk);
-
- s5pv210_dram_conf[1].refresh = (__raw_readl(S5P_VA_DMC1 + 0x30) * 1000);
- s5pv210_dram_conf[1].freq = clk_get_rate(dmc1_clk);
-
- policy->cur = policy->min = policy->max = s5pv210_getspeed(0);
-
- cpufreq_frequency_table_get_attr(s5pv210_freq_table, policy->cpu);
-
- policy->cpuinfo.transition_latency = 40000;
-
- return cpufreq_frequency_table_cpuinfo(policy, s5pv210_freq_table);
-}
-
-static struct cpufreq_driver s5pv210_driver = {
- .flags = CPUFREQ_STICKY,
- .verify = s5pv210_verify_speed,
- .target = s5pv210_target,
- .get = s5pv210_getspeed,
- .init = s5pv210_cpu_init,
- .name = "s5pv210",
-#ifdef CONFIG_PM
- .suspend = s5pv210_cpufreq_suspend,
- .resume = s5pv210_cpufreq_resume,
-#endif
-};
-
-static int __init s5pv210_cpufreq_init(void)
-{
- return cpufreq_register_driver(&s5pv210_driver);
-}
-
-late_initcall(s5pv210_cpufreq_init);