diff options
Diffstat (limited to 'drivers/cpufreq/exynos4210-cpufreq.c')
| -rw-r--r-- | drivers/cpufreq/exynos4210-cpufreq.c | 685 |
1 files changed, 151 insertions, 534 deletions
diff --git a/drivers/cpufreq/exynos4210-cpufreq.c b/drivers/cpufreq/exynos4210-cpufreq.c index ab9741fab92e..fb148fa27678 100644 --- a/drivers/cpufreq/exynos4210-cpufreq.c +++ b/drivers/cpufreq/exynos4210-cpufreq.c @@ -2,61 +2,52 @@ * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd. * http://www.samsung.com * - * EXYNOS4 - CPU frequency scaling support + * EXYNOS4210 - 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/module.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 <linux/notifier.h> -#include <linux/suspend.h> -#include <mach/map.h> #include <mach/regs-clock.h> -#include <mach/regs-mem.h> +#include <mach/cpufreq.h> -#include <plat/clock.h> -#include <plat/pm.h> +#define CPUFREQ_LEVEL_END L5 + +static int max_support_idx = L0; +static int min_support_idx = (CPUFREQ_LEVEL_END - 1); 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; - -static unsigned int locking_frequency; -static bool frequency_locked; -static DEFINE_MUTEX(cpufreq_lock); - -enum exynos4_memory_type { - DDR2 = 4, - LPDDR2, - DDR3, +struct cpufreq_clkdiv { + unsigned int index; + unsigned int clkdiv; }; -enum cpufreq_level_index { - L0, L1, L2, L3, CPUFREQ_LEVEL_END, +static unsigned int exynos4210_volt_table[CPUFREQ_LEVEL_END] = { + 1250000, 1150000, 1050000, 975000, 950000, }; -static struct cpufreq_frequency_table exynos4_freq_table[] = { - {L0, 1000*1000}, - {L1, 800*1000}, - {L2, 400*1000}, - {L3, 100*1000}, + +static struct cpufreq_clkdiv exynos4210_clkdiv_table[CPUFREQ_LEVEL_END]; + +static struct cpufreq_frequency_table exynos4210_freq_table[] = { + {L0, 1200*1000}, + {L1, 1000*1000}, + {L2, 800*1000}, + {L3, 500*1000}, + {L4, 200*1000}, {0, CPUFREQ_TABLE_END}, }; @@ -67,17 +58,20 @@ static unsigned int clkdiv_cpu0[CPUFREQ_LEVEL_END][7] = { * DIVATB, DIVPCLK_DBG, DIVAPLL } */ - /* ARM L0: 1000MHz */ - { 0, 3, 7, 3, 3, 0, 1 }, + /* ARM L0: 1200MHz */ + { 0, 3, 7, 3, 4, 1, 7 }, - /* ARM L1: 800MHz */ - { 0, 3, 7, 3, 3, 0, 1 }, + /* ARM L1: 1000MHz */ + { 0, 3, 7, 3, 4, 1, 7 }, - /* ARM L2: 400MHz */ - { 0, 1, 3, 1, 3, 0, 1 }, + /* ARM L2: 800MHz */ + { 0, 3, 7, 3, 3, 1, 7 }, - /* ARM L3: 100MHz */ - { 0, 0, 1, 0, 3, 1, 1 }, + /* ARM L3: 500MHz */ + { 0, 3, 7, 3, 3, 1, 7 }, + + /* ARM L4: 200MHz */ + { 0, 1, 3, 1, 3, 1, 0 }, }; static unsigned int clkdiv_cpu1[CPUFREQ_LEVEL_END][2] = { @@ -86,245 +80,70 @@ static unsigned int clkdiv_cpu1[CPUFREQ_LEVEL_END][2] = { * { DIVCOPY, DIVHPM } */ - /* ARM L0: 1000MHz */ - { 3, 0 }, + /* ARM L0: 1200MHz */ + { 5, 0 }, - /* ARM L1: 800MHz */ - { 3, 0 }, + /* ARM L1: 1000MHz */ + { 4, 0 }, - /* ARM L2: 400MHz */ + /* ARM L2: 800MHz */ { 3, 0 }, - /* ARM L3: 100MHz */ + /* ARM L3: 500MHz */ { 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; + /* ARM L4: 200MHz */ + { 3, 0 }, }; -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 exynos4210_apll_pms_table[CPUFREQ_LEVEL_END] = { + /* APLL FOUT L0: 1200MHz */ + ((150 << 16) | (3 << 8) | 1), -static unsigned int exynos4_apll_pms_table[CPUFREQ_LEVEL_END] = { - /* APLL FOUT L0: 1000MHz */ + /* APLL FOUT L1: 1000MHz */ ((250 << 16) | (6 << 8) | 1), - /* APLL FOUT L1: 800MHz */ + /* APLL FOUT L2: 800MHz */ ((200 << 16) | (6 << 8) | 1), - /* APLL FOUT L2 : 400MHz */ - ((200 << 16) | (6 << 8) | 2), + /* APLL FOUT L3: 500MHz */ + ((250 << 16) | (6 << 8) | 2), - /* APLL FOUT L3: 100MHz */ - ((200 << 16) | (6 << 8) | 4), + /* APLL FOUT L4: 200MHz */ + ((200 << 16) | (6 << 8) | 3), }; -static int exynos4_verify_speed(struct cpufreq_policy *policy) -{ - return cpufreq_frequency_table_verify(policy, exynos4_freq_table); -} - -static unsigned int exynos4_getspeed(unsigned int cpu) -{ - return clk_get_rate(cpu_clk) / 1000; -} - -static void exynos4_set_clkdiv(unsigned int div_index) +static void exynos4210_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 = exynos4210_clkdiv_table[div_index].clkdiv; - 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); + __raw_writel(tmp, EXYNOS4_CLKDIV_CPU); do { - tmp = __raw_readl(S5P_CLKDIV_STATCPU); + tmp = __raw_readl(EXYNOS4_CLKDIV_STATCPU); } while (tmp & 0x1111111); /* Change Divider - CPU1 */ - tmp = __raw_readl(S5P_CLKDIV_CPU1); + tmp = __raw_readl(EXYNOS4_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); + __raw_writel(tmp, EXYNOS4_CLKDIV_CPU1); 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); + tmp = __raw_readl(EXYNOS4_CLKDIV_STATCPU1); } while (tmp & 0x11); } -static void exynos4_set_apll(unsigned int index) +static void exynos4210_set_apll(unsigned int index) { unsigned int tmp; @@ -332,356 +151,154 @@ static void exynos4_set_apll(unsigned int index) clk_set_parent(moutcore, mout_mpll); do { - tmp = (__raw_readl(S5P_CLKMUX_STATCPU) - >> S5P_CLKSRC_CPU_MUXCORE_SHIFT); + tmp = (__raw_readl(EXYNOS4_CLKMUX_STATCPU) + >> EXYNOS4_CLKSRC_CPU_MUXCORE_SHIFT); tmp &= 0x7; } while (tmp != 0x2); /* 2. Set APLL Lock time */ - __raw_writel(S5P_APLL_LOCKTIME, S5P_APLL_LOCK); + __raw_writel(EXYNOS4_APLL_LOCKTIME, EXYNOS4_APLL_LOCK); /* 3. Change PLL PMS values */ - tmp = __raw_readl(S5P_APLL_CON0); + tmp = __raw_readl(EXYNOS4_APLL_CON0); tmp &= ~((0x3ff << 16) | (0x3f << 8) | (0x7 << 0)); - tmp |= exynos4_apll_pms_table[index]; - __raw_writel(tmp, S5P_APLL_CON0); + tmp |= exynos4210_apll_pms_table[index]; + __raw_writel(tmp, EXYNOS4_APLL_CON0); /* 4. wait_lock_time */ do { - tmp = __raw_readl(S5P_APLL_CON0); - } while (!(tmp & (0x1 << S5P_APLLCON0_LOCKED_SHIFT))); + tmp = __raw_readl(EXYNOS4_APLL_CON0); + } while (!(tmp & (0x1 << EXYNOS4_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)); + tmp = __raw_readl(EXYNOS4_CLKMUX_STATCPU); + tmp &= EXYNOS4_CLKMUX_STATCPU_MUXCORE_MASK; + } while (tmp != (0x1 << EXYNOS4_CLKSRC_CPU_MUXCORE_SHIFT)); +} + +bool exynos4210_pms_change(unsigned int old_index, unsigned int new_index) +{ + unsigned int old_pm = (exynos4210_apll_pms_table[old_index] >> 8); + unsigned int new_pm = (exynos4210_apll_pms_table[new_index] >> 8); + + return (old_pm == new_pm) ? 0 : 1; } -static void exynos4_set_frequency(unsigned int old_index, unsigned int new_index) +static void exynos4210_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) { + if (!exynos4210_pms_change(old_index, new_index)) { /* 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); + exynos4210_set_clkdiv(new_index); /* 2. Change just s value in apll m,p,s value */ - tmp = __raw_readl(S5P_APLL_CON0); + tmp = __raw_readl(EXYNOS4_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); + tmp |= (exynos4210_apll_pms_table[new_index] & 0x7); + __raw_writel(tmp, EXYNOS4_APLL_CON0); } else { + /* Clock Configuration Procedure */ + /* 1. Change the system clock divider values */ + exynos4210_set_clkdiv(new_index); + /* 2. Change the apll m,p,s value */ + exynos4210_set_apll(new_index); + } + } else if (old_index < new_index) { + if (!exynos4210_pms_change(old_index, new_index)) { /* 1. Change just s value in apll m,p,s value */ - tmp = __raw_readl(S5P_APLL_CON0); + tmp = __raw_readl(EXYNOS4_APLL_CON0); tmp &= ~(0x7 << 0); - tmp |= (exynos4_apll_pms_table[new_index] & 0x7); - __raw_writel(tmp, S5P_APLL_CON0); + tmp |= (exynos4210_apll_pms_table[new_index] & 0x7); + __raw_writel(tmp, EXYNOS4_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; - int err = -EINVAL; - - freqs.old = exynos4_getspeed(policy->cpu); - - mutex_lock(&cpufreq_lock); - - if (frequency_locked && target_freq != locking_frequency) { - err = -EAGAIN; - goto out; - } - - if (cpufreq_frequency_table_target(policy, exynos4_freq_table, - freqs.old, relation, &old_index)) - goto out; - - if (cpufreq_frequency_table_target(policy, exynos4_freq_table, - target_freq, relation, &index)) - goto out; - - err = 0; - - freqs.new = exynos4_freq_table[index].frequency; - freqs.cpu = policy->cpu; - - if (freqs.new == freqs.old) - goto out; - - /* 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); - -out: - mutex_unlock(&cpufreq_lock); - return err; -} - -#ifdef CONFIG_PM -/* - * These suspend/resume are used as syscore_ops, it is already too - * late to set regulator voltages at this stage. - */ -static int exynos4_cpufreq_suspend(struct cpufreq_policy *policy) -{ - return 0; -} - -static int exynos4_cpufreq_resume(struct cpufreq_policy *policy) -{ - return 0; -} -#endif - -/** - * exynos4_cpufreq_pm_notifier - block CPUFREQ's activities in suspend-resume - * context - * @notifier - * @pm_event - * @v - * - * While frequency_locked == true, target() ignores every frequency but - * locking_frequency. The locking_frequency value is the initial frequency, - * which is set by the bootloader. In order to eliminate possible - * inconsistency in clock values, we save and restore frequencies during - * suspend and resume and block CPUFREQ activities. Note that the standard - * suspend/resume cannot be used as they are too deep (syscore_ops) for - * regulator actions. - */ -static int exynos4_cpufreq_pm_notifier(struct notifier_block *notifier, - unsigned long pm_event, void *v) -{ - struct cpufreq_policy *policy = cpufreq_cpu_get(0); /* boot CPU */ - static unsigned int saved_frequency; - unsigned int temp; - - mutex_lock(&cpufreq_lock); - switch (pm_event) { - case PM_SUSPEND_PREPARE: - if (frequency_locked) - goto out; - frequency_locked = true; - - if (locking_frequency) { - saved_frequency = exynos4_getspeed(0); - - mutex_unlock(&cpufreq_lock); - exynos4_target(policy, locking_frequency, - CPUFREQ_RELATION_H); - mutex_lock(&cpufreq_lock); - } - - break; - case PM_POST_SUSPEND: - - if (saved_frequency) { - /* - * While frequency_locked, only locking_frequency - * is valid for target(). In order to use - * saved_frequency while keeping frequency_locked, - * we temporarly overwrite locking_frequency. - */ - temp = locking_frequency; - locking_frequency = saved_frequency; - - mutex_unlock(&cpufreq_lock); - exynos4_target(policy, locking_frequency, - CPUFREQ_RELATION_H); - mutex_lock(&cpufreq_lock); - - locking_frequency = temp; + exynos4210_set_clkdiv(new_index); + } else { + /* Clock Configuration Procedure */ + /* 1. Change the apll m,p,s value */ + exynos4210_set_apll(new_index); + /* 2. Change the system clock divider values */ + exynos4210_set_clkdiv(new_index); } - - frequency_locked = false; - break; } -out: - mutex_unlock(&cpufreq_lock); - - return NOTIFY_OK; } -static struct notifier_block exynos4_cpufreq_nb = { - .notifier_call = exynos4_cpufreq_pm_notifier, -}; - -static int exynos4_cpufreq_cpu_init(struct cpufreq_policy *policy) +int exynos4210_cpufreq_init(struct exynos_dvfs_info *info) { - int ret; - - 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); - - ret = cpufreq_frequency_table_cpuinfo(policy, exynos4_freq_table); - if (ret) - return ret; - - cpufreq_frequency_table_get_attr(exynos4_freq_table, policy->cpu); - - return 0; -} - -static int exynos4_cpufreq_cpu_exit(struct cpufreq_policy *policy) -{ - cpufreq_frequency_table_put_attr(policy->cpu); - return 0; -} - -static struct freq_attr *exynos4_cpufreq_attr[] = { - &cpufreq_freq_attr_scaling_available_freqs, - NULL, -}; - -static struct cpufreq_driver exynos4_driver = { - .flags = CPUFREQ_STICKY, - .verify = exynos4_verify_speed, - .target = exynos4_target, - .get = exynos4_getspeed, - .init = exynos4_cpufreq_cpu_init, - .exit = exynos4_cpufreq_cpu_exit, - .name = "exynos4_cpufreq", - .attr = exynos4_cpufreq_attr, -#ifdef CONFIG_PM - .suspend = exynos4_cpufreq_suspend, - .resume = exynos4_cpufreq_resume, -#endif -}; + int i; + unsigned int tmp; + unsigned long rate; -static int __init exynos4_cpufreq_init(void) -{ cpu_clk = clk_get(NULL, "armclk"); if (IS_ERR(cpu_clk)) return PTR_ERR(cpu_clk); - locking_frequency = exynos4_getspeed(0); - moutcore = clk_get(NULL, "moutcore"); if (IS_ERR(moutcore)) - goto out; + goto err_moutcore; mout_mpll = clk_get(NULL, "mout_mpll"); if (IS_ERR(mout_mpll)) - goto out; + goto err_mout_mpll; + + rate = clk_get_rate(mout_mpll) / 1000; 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; + goto err_mout_apll; + + tmp = __raw_readl(EXYNOS4_CLKDIV_CPU); + + for (i = L0; i < CPUFREQ_LEVEL_END; i++) { + tmp &= ~(EXYNOS4_CLKDIV_CPU0_CORE_MASK | + EXYNOS4_CLKDIV_CPU0_COREM0_MASK | + EXYNOS4_CLKDIV_CPU0_COREM1_MASK | + EXYNOS4_CLKDIV_CPU0_PERIPH_MASK | + EXYNOS4_CLKDIV_CPU0_ATB_MASK | + EXYNOS4_CLKDIV_CPU0_PCLKDBG_MASK | + EXYNOS4_CLKDIV_CPU0_APLL_MASK); + + tmp |= ((clkdiv_cpu0[i][0] << EXYNOS4_CLKDIV_CPU0_CORE_SHIFT) | + (clkdiv_cpu0[i][1] << EXYNOS4_CLKDIV_CPU0_COREM0_SHIFT) | + (clkdiv_cpu0[i][2] << EXYNOS4_CLKDIV_CPU0_COREM1_SHIFT) | + (clkdiv_cpu0[i][3] << EXYNOS4_CLKDIV_CPU0_PERIPH_SHIFT) | + (clkdiv_cpu0[i][4] << EXYNOS4_CLKDIV_CPU0_ATB_SHIFT) | + (clkdiv_cpu0[i][5] << EXYNOS4_CLKDIV_CPU0_PCLKDBG_SHIFT) | + (clkdiv_cpu0[i][6] << EXYNOS4_CLKDIV_CPU0_APLL_SHIFT)); + + exynos4210_clkdiv_table[i].clkdiv = tmp; } - /* - * 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); - } - - register_pm_notifier(&exynos4_cpufreq_nb); - - return cpufreq_register_driver(&exynos4_driver); - -out: - if (!IS_ERR(cpu_clk)) - clk_put(cpu_clk); + info->mpll_freq_khz = rate; + info->pm_lock_idx = L2; + info->pll_safe_idx = L2; + info->max_support_idx = max_support_idx; + info->min_support_idx = min_support_idx; + info->cpu_clk = cpu_clk; + info->volt_table = exynos4210_volt_table; + info->freq_table = exynos4210_freq_table; + info->set_freq = exynos4210_set_frequency; + info->need_apll_change = exynos4210_pms_change; - if (!IS_ERR(moutcore)) - clk_put(moutcore); + return 0; +err_mout_apll: if (!IS_ERR(mout_mpll)) clk_put(mout_mpll); +err_mout_mpll: + if (!IS_ERR(moutcore)) + clk_put(moutcore); +err_moutcore: + if (!IS_ERR(cpu_clk)) + clk_put(cpu_clk); - 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__); - + pr_debug("%s: failed initialization\n", __func__); return -EINVAL; } -late_initcall(exynos4_cpufreq_init); +EXPORT_SYMBOL(exynos4210_cpufreq_init); |