diff options
author | Linus Torvalds | 2011-07-24 20:56:18 -0700 |
---|---|---|
committer | Linus Torvalds | 2011-07-24 20:56:18 -0700 |
commit | 8405b044e5238afebd7248d927c1d261d2239767 (patch) | |
tree | 56c6a3c1a4542ead63b4abdd9fe6629d849402d5 /arch | |
parent | ee05eff6f79c25617e5b7d7677b8f79d26abbe37 (diff) | |
parent | 133de1211982bd2ba9ab401f7a73d25d052ccd61 (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/Kconfig | 4 | ||||
-rw-r--r-- | arch/arm/mach-exynos4/Makefile | 1 | ||||
-rw-r--r-- | arch/arm/mach-exynos4/cpufreq.c | 569 | ||||
-rw-r--r-- | arch/arm/mach-s3c64xx/Makefile | 4 | ||||
-rw-r--r-- | arch/arm/mach-s3c64xx/cpufreq.c | 270 | ||||
-rw-r--r-- | arch/arm/mach-s5pv210/Makefile | 1 | ||||
-rw-r--r-- | arch/arm/mach-s5pv210/cpufreq.c | 485 |
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); |