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Merge branch 'next/cpufreq-exynos' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung

Browse source 
* 'next/cpufreq-exynos' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
  cpufreq: exynos: Fix hang in pm handler due to frequency mismatch
  cpufreq: exynos: Initialize return variable
  cpufreq: exynos: Fix unsigned variable being checked for negative value
  cpufreq: exynos: Get booting freq value in exynos_cpufreq_init
  cpufreq: exynos: Show list of available frequencies
  cpufreq: exynos: Add missing static
  cpufreq: exynos: Split exynos_target function into two functions
  cpufreq: exynos: Use APLL_FREQ macro for cpu divider value
  cpufreq: exynos: Check old & new frequency early
  cpufreq: exynos: Remove unused variable & IS_ERR
This commit is contained in:
Rafael J. Wysocki 2013-02-15 14:00:15 +01:00
commit 60a406d1de
5 changed files with 248 additions and 663 deletions
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19
arch/arm/mach-exynos/include/mach/cpufreq.h
View file

@ -18,12 +18,25 @@ enum cpufreq_level_index {
L20, L20,
}; };
#define APLL_FREQ(f, a0, a1, a2, a3, a4, a5, a6, a7, b0, b1, b2, m, p, s) \
{ \
.freq = (f) * 1000, \
.clk_div_cpu0 = ((a0) | (a1) << 4 | (a2) << 8 | (a3) << 12 | \
(a4) << 16 | (a5) << 20 | (a6) << 24 | (a7) << 28), \
.clk_div_cpu1 = (b0 << 0 | b1 << 4 | b2 << 8), \
.mps = ((m) << 16 | (p) << 8 | (s)), \
}
struct apll_freq {
unsigned int freq;
u32 clk_div_cpu0;
u32 clk_div_cpu1;
u32 mps;
};
struct exynos_dvfs_info { struct exynos_dvfs_info {
unsigned long mpll_freq_khz; unsigned long mpll_freq_khz;
unsigned int pll_safe_idx; unsigned int pll_safe_idx;
unsigned int pm_lock_idx;
unsigned int max_support_idx;
unsigned int min_support_idx;
struct clk *cpu_clk; struct clk *cpu_clk;
unsigned int *volt_table; unsigned int *volt_table;
struct cpufreq_frequency_table *freq_table; struct cpufreq_frequency_table *freq_table;

174
drivers/cpufreq/exynos-cpufreq.c
View file

@ -42,51 +42,56 @@ static unsigned int exynos_getspeed(unsigned int cpu)
return clk_get_rate(exynos_info->cpu_clk) / 1000; return clk_get_rate(exynos_info->cpu_clk) / 1000;
} }
static int exynos_target(struct cpufreq_policy *policy, static int exynos_cpufreq_get_index(unsigned int freq)
unsigned int target_freq, {
unsigned int relation) struct cpufreq_frequency_table *freq_table = exynos_info->freq_table;
int index;
for (index = 0;
freq_table[index].frequency != CPUFREQ_TABLE_END; index++)
if (freq_table[index].frequency == freq)
break;
if (freq_table[index].frequency == CPUFREQ_TABLE_END)
return -EINVAL;
return index;
}
static int exynos_cpufreq_scale(unsigned int target_freq)
{ {
unsigned int index, old_index;
unsigned int arm_volt, safe_arm_volt = 0;
int ret = 0;
struct cpufreq_frequency_table *freq_table = exynos_info->freq_table; struct cpufreq_frequency_table *freq_table = exynos_info->freq_table;
unsigned int *volt_table = exynos_info->volt_table; unsigned int *volt_table = exynos_info->volt_table;
struct cpufreq_policy *policy = cpufreq_cpu_get(0);
unsigned int arm_volt, safe_arm_volt = 0;
unsigned int mpll_freq_khz = exynos_info->mpll_freq_khz; unsigned int mpll_freq_khz = exynos_info->mpll_freq_khz;
int index, old_index;
mutex_lock(&cpufreq_lock); int ret = 0;
freqs.old = policy->cur; freqs.old = policy->cur;
freqs.new = target_freq;
freqs.cpu = policy->cpu;
if (frequency_locked && target_freq != locking_frequency) { if (freqs.new == freqs.old)
ret = -EAGAIN;
goto out; goto out;
}
/* /*
* The policy max have been changed so that we cannot get proper * The policy max have been changed so that we cannot get proper
* old_index with cpufreq_frequency_table_target(). Thus, ignore * old_index with cpufreq_frequency_table_target(). Thus, ignore
* policy and get the index from the raw freqeuncy table. * policy and get the index from the raw freqeuncy table.
*/ */
for (old_index = 0; old_index = exynos_cpufreq_get_index(freqs.old);
freq_table[old_index].frequency != CPUFREQ_TABLE_END; if (old_index < 0) {
old_index++) ret = old_index;
if (freq_table[old_index].frequency == freqs.old)
break;
if (freq_table[old_index].frequency == CPUFREQ_TABLE_END) {
ret = -EINVAL;
goto out; goto out;
} }
if (cpufreq_frequency_table_target(policy, freq_table, index = exynos_cpufreq_get_index(target_freq);
target_freq, relation, &index)) { if (index < 0) {
ret = -EINVAL; ret = index;
goto out; goto out;
} }
freqs.new = freq_table[index].frequency;
freqs.cpu = policy->cpu;
/* /*
* ARM clock source will be changed APLL to MPLL temporary * ARM clock source will be changed APLL to MPLL temporary
* To support this level, need to control regulator for * To support this level, need to control regulator for
@ -106,15 +111,25 @@ static int exynos_target(struct cpufreq_policy *policy,
/* When the new frequency is higher than current frequency */ /* When the new frequency is higher than current frequency */
if ((freqs.new > freqs.old) && !safe_arm_volt) { if ((freqs.new > freqs.old) && !safe_arm_volt) {
/* Firstly, voltage up to increase frequency */ /* Firstly, voltage up to increase frequency */
regulator_set_voltage(arm_regulator, arm_volt, ret = regulator_set_voltage(arm_regulator, arm_volt, arm_volt);
arm_volt); if (ret) {
pr_err("%s: failed to set cpu voltage to %d\n",
__func__, arm_volt);
goto out;
}
} }
if (safe_arm_volt) if (safe_arm_volt) {
regulator_set_voltage(arm_regulator, safe_arm_volt, ret = regulator_set_voltage(arm_regulator, safe_arm_volt,
safe_arm_volt); safe_arm_volt);
if (freqs.new != freqs.old) if (ret) {
exynos_info->set_freq(old_index, index); pr_err("%s: failed to set cpu voltage to %d\n",
__func__, safe_arm_volt);
goto out;
}
}
exynos_info->set_freq(old_index, index);
for_each_cpu(freqs.cpu, policy->cpus) for_each_cpu(freqs.cpu, policy->cpus)
cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE); cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
@ -125,8 +140,44 @@ static int exynos_target(struct cpufreq_policy *policy,
/* down the voltage after frequency change */ /* down the voltage after frequency change */
regulator_set_voltage(arm_regulator, arm_volt, regulator_set_voltage(arm_regulator, arm_volt,
arm_volt); arm_volt);
if (ret) {
pr_err("%s: failed to set cpu voltage to %d\n",
__func__, arm_volt);
goto out;
}
} }
out:
cpufreq_cpu_put(policy);
return ret;
}
static int exynos_target(struct cpufreq_policy *policy,
unsigned int target_freq,
unsigned int relation)
{
struct cpufreq_frequency_table *freq_table = exynos_info->freq_table;
unsigned int index;
unsigned int new_freq;
int ret = 0;
mutex_lock(&cpufreq_lock);
if (frequency_locked)
goto out;
if (cpufreq_frequency_table_target(policy, freq_table,
target_freq, relation, &index)) {
ret = -EINVAL;
goto out;
}
new_freq = freq_table[index].frequency;
ret = exynos_cpufreq_scale(new_freq);
out: out:
mutex_unlock(&cpufreq_lock); mutex_unlock(&cpufreq_lock);
@ -163,51 +214,26 @@ static int exynos_cpufreq_resume(struct cpufreq_policy *policy)
static int exynos_cpufreq_pm_notifier(struct notifier_block *notifier, static int exynos_cpufreq_pm_notifier(struct notifier_block *notifier,
unsigned long pm_event, void *v) unsigned long pm_event, void *v)
{ {
struct cpufreq_policy *policy = cpufreq_cpu_get(0); /* boot CPU */ int ret;
static unsigned int saved_frequency;
unsigned int temp;
mutex_lock(&cpufreq_lock);
switch (pm_event) { switch (pm_event) {
case PM_SUSPEND_PREPARE: case PM_SUSPEND_PREPARE:
if (frequency_locked) mutex_lock(&cpufreq_lock);
goto out;
frequency_locked = true; frequency_locked = true;
mutex_unlock(&cpufreq_lock);
if (locking_frequency) { ret = exynos_cpufreq_scale(locking_frequency);
saved_frequency = exynos_getspeed(0); if (ret < 0)
return NOTIFY_BAD;
mutex_unlock(&cpufreq_lock);
exynos_target(policy, locking_frequency,
CPUFREQ_RELATION_H);
mutex_lock(&cpufreq_lock);
}
break; break;
case PM_POST_SUSPEND: case PM_POST_SUSPEND:
if (saved_frequency) { mutex_lock(&cpufreq_lock);
/*
* 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);
exynos_target(policy, locking_frequency,
CPUFREQ_RELATION_H);
mutex_lock(&cpufreq_lock);
locking_frequency = temp;
}
frequency_locked = false; frequency_locked = false;
mutex_unlock(&cpufreq_lock);
break; break;
} }
out:
mutex_unlock(&cpufreq_lock);
return NOTIFY_OK; return NOTIFY_OK;
} }
@ -222,8 +248,6 @@ static int exynos_cpufreq_cpu_init(struct cpufreq_policy *policy)
cpufreq_frequency_table_get_attr(exynos_info->freq_table, policy->cpu); cpufreq_frequency_table_get_attr(exynos_info->freq_table, policy->cpu);
locking_frequency = exynos_getspeed(0);
/* set the transition latency value */ /* set the transition latency value */
policy->cpuinfo.transition_latency = 100000; policy->cpuinfo.transition_latency = 100000;
@ -232,13 +256,26 @@ static int exynos_cpufreq_cpu_init(struct cpufreq_policy *policy)
return cpufreq_frequency_table_cpuinfo(policy, exynos_info->freq_table); return cpufreq_frequency_table_cpuinfo(policy, exynos_info->freq_table);
} }
static int exynos_cpufreq_cpu_exit(struct cpufreq_policy *policy)
{
cpufreq_frequency_table_put_attr(policy->cpu);
return 0;
}
static struct freq_attr *exynos_cpufreq_attr[] = {
&cpufreq_freq_attr_scaling_available_freqs,
NULL,
};
static struct cpufreq_driver exynos_driver = { static struct cpufreq_driver exynos_driver = {
.flags = CPUFREQ_STICKY, .flags = CPUFREQ_STICKY,
.verify = exynos_verify_speed, .verify = exynos_verify_speed,
.target = exynos_target, .target = exynos_target,
.get = exynos_getspeed, .get = exynos_getspeed,
.init = exynos_cpufreq_cpu_init, .init = exynos_cpufreq_cpu_init,
.exit = exynos_cpufreq_cpu_exit,
.name = "exynos_cpufreq", .name = "exynos_cpufreq",
.attr = exynos_cpufreq_attr,
#ifdef CONFIG_PM #ifdef CONFIG_PM
.suspend = exynos_cpufreq_suspend, .suspend = exynos_cpufreq_suspend,
.resume = exynos_cpufreq_resume, .resume = exynos_cpufreq_resume,
@ -276,6 +313,8 @@ static int __init exynos_cpufreq_init(void)
goto err_vdd_arm; goto err_vdd_arm;
} }
locking_frequency = exynos_getspeed(0);
register_pm_notifier(&exynos_cpufreq_nb); register_pm_notifier(&exynos_cpufreq_nb);
if (cpufreq_register_driver(&exynos_driver)) { if (cpufreq_register_driver(&exynos_driver)) {
@ -287,8 +326,7 @@ static int __init exynos_cpufreq_init(void)
err_cpufreq: err_cpufreq:
unregister_pm_notifier(&exynos_cpufreq_nb); unregister_pm_notifier(&exynos_cpufreq_nb);
if (!IS_ERR(arm_regulator)) regulator_put(arm_regulator);
regulator_put(arm_regulator);
err_vdd_arm: err_vdd_arm:
kfree(exynos_info); kfree(exynos_info);
pr_debug("%s: failed initialization\n", __func__); pr_debug("%s: failed initialization\n", __func__);

152
drivers/cpufreq/exynos4210-cpufreq.c
View file

@ -20,97 +20,37 @@
#include <mach/regs-clock.h> #include <mach/regs-clock.h>
#include <mach/cpufreq.h> #include <mach/cpufreq.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 *cpu_clk;
static struct clk *moutcore; static struct clk *moutcore;
static struct clk *mout_mpll; static struct clk *mout_mpll;
static struct clk *mout_apll; static struct clk *mout_apll;
struct cpufreq_clkdiv { static unsigned int exynos4210_volt_table[] = {
unsigned int index;
unsigned int clkdiv;
};
static unsigned int exynos4210_volt_table[CPUFREQ_LEVEL_END] = {
1250000, 1150000, 1050000, 975000, 950000, 1250000, 1150000, 1050000, 975000, 950000,
}; };
static struct cpufreq_clkdiv exynos4210_clkdiv_table[CPUFREQ_LEVEL_END];
static struct cpufreq_frequency_table exynos4210_freq_table[] = { static struct cpufreq_frequency_table exynos4210_freq_table[] = {
{L0, 1200*1000}, {L0, 1200 * 1000},
{L1, 1000*1000}, {L1, 1000 * 1000},
{L2, 800*1000}, {L2, 800 * 1000},
{L3, 500*1000}, {L3, 500 * 1000},
{L4, 200*1000}, {L4, 200 * 1000},
{0, CPUFREQ_TABLE_END}, {0, CPUFREQ_TABLE_END},
}; };
static unsigned int clkdiv_cpu0[CPUFREQ_LEVEL_END][7] = { static struct apll_freq apll_freq_4210[] = {
/* /*
* Clock divider value for following * values:
* { DIVCORE, DIVCOREM0, DIVCOREM1, DIVPERIPH, * freq
* DIVATB, DIVPCLK_DBG, DIVAPLL } * clock divider for CORE, COREM0, COREM1, PERIPH, ATB, PCLK_DBG, APLL, RESERVED
* clock divider for COPY, HPM, RESERVED
* PLL M, P, S
*/ */
APLL_FREQ(1200, 0, 3, 7, 3, 4, 1, 7, 0, 5, 0, 0, 150, 3, 1),
/* ARM L0: 1200MHz */ APLL_FREQ(1000, 0, 3, 7, 3, 4, 1, 7, 0, 4, 0, 0, 250, 6, 1),
{ 0, 3, 7, 3, 4, 1, 7 }, APLL_FREQ(800, 0, 3, 7, 3, 3, 1, 7, 0, 3, 0, 0, 200, 6, 1),
APLL_FREQ(500, 0, 3, 7, 3, 3, 1, 7, 0, 3, 0, 0, 250, 6, 2),
/* ARM L1: 1000MHz */ APLL_FREQ(200, 0, 1, 3, 1, 3, 1, 0, 0, 3, 0, 0, 200, 6, 3),
{ 0, 3, 7, 3, 4, 1, 7 },
/* ARM L2: 800MHz */
{ 0, 3, 7, 3, 3, 1, 7 },
/* 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] = {
/*
* Clock divider value for following
* { DIVCOPY, DIVHPM }
*/
/* ARM L0: 1200MHz */
{ 5, 0 },
/* ARM L1: 1000MHz */
{ 4, 0 },
/* ARM L2: 800MHz */
{ 3, 0 },
/* ARM L3: 500MHz */
{ 3, 0 },
/* ARM L4: 200MHz */
{ 3, 0 },
};
static unsigned int exynos4210_apll_pms_table[CPUFREQ_LEVEL_END] = {
/* APLL FOUT L0: 1200MHz */
((150 << 16) | (3 << 8) | 1),
/* APLL FOUT L1: 1000MHz */
((250 << 16) | (6 << 8) | 1),
/* APLL FOUT L2: 800MHz */
((200 << 16) | (6 << 8) | 1),
/* APLL FOUT L3: 500MHz */
((250 << 16) | (6 << 8) | 2),
/* APLL FOUT L4: 200MHz */
((200 << 16) | (6 << 8) | 3),
}; };
static void exynos4210_set_clkdiv(unsigned int div_index) static void exynos4210_set_clkdiv(unsigned int div_index)
@ -119,7 +59,7 @@ static void exynos4210_set_clkdiv(unsigned int div_index)
/* Change Divider - CPU0 */ /* Change Divider - CPU0 */
tmp = exynos4210_clkdiv_table[div_index].clkdiv; tmp = apll_freq_4210[div_index].clk_div_cpu0;
__raw_writel(tmp, EXYNOS4_CLKDIV_CPU); __raw_writel(tmp, EXYNOS4_CLKDIV_CPU);
@ -129,12 +69,7 @@ static void exynos4210_set_clkdiv(unsigned int div_index)
/* Change Divider - CPU1 */ /* Change Divider - CPU1 */
tmp = __raw_readl(EXYNOS4_CLKDIV_CPU1); tmp = apll_freq_4210[div_index].clk_div_cpu1;
tmp &= ~((0x7 << 4) | 0x7);
tmp |= ((clkdiv_cpu1[div_index][0] << 4) |
(clkdiv_cpu1[div_index][1] << 0));
__raw_writel(tmp, EXYNOS4_CLKDIV_CPU1); __raw_writel(tmp, EXYNOS4_CLKDIV_CPU1);
@ -162,7 +97,7 @@ static void exynos4210_set_apll(unsigned int index)
/* 3. Change PLL PMS values */ /* 3. Change PLL PMS values */
tmp = __raw_readl(EXYNOS4_APLL_CON0); tmp = __raw_readl(EXYNOS4_APLL_CON0);
tmp &= ~((0x3ff << 16) | (0x3f << 8) | (0x7 << 0)); tmp &= ~((0x3ff << 16) | (0x3f << 8) | (0x7 << 0));
tmp |= exynos4210_apll_pms_table[index]; tmp |= apll_freq_4210[index].mps;
__raw_writel(tmp, EXYNOS4_APLL_CON0); __raw_writel(tmp, EXYNOS4_APLL_CON0);
/* 4. wait_lock_time */ /* 4. wait_lock_time */
@ -179,10 +114,10 @@ static void exynos4210_set_apll(unsigned int index)
} while (tmp != (0x1 << EXYNOS4_CLKSRC_CPU_MUXCORE_SHIFT)); } while (tmp != (0x1 << EXYNOS4_CLKSRC_CPU_MUXCORE_SHIFT));
} }
bool exynos4210_pms_change(unsigned int old_index, unsigned int new_index) static 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 old_pm = apll_freq_4210[old_index].mps >> 8;
unsigned int new_pm = (exynos4210_apll_pms_table[new_index] >> 8); unsigned int new_pm = apll_freq_4210[new_index].mps >> 8;
return (old_pm == new_pm) ? 0 : 1; return (old_pm == new_pm) ? 0 : 1;
} }
@ -200,7 +135,7 @@ static void exynos4210_set_frequency(unsigned int old_index,
/* 2. Change just s value in apll m,p,s value */ /* 2. Change just s value in apll m,p,s value */
tmp = __raw_readl(EXYNOS4_APLL_CON0); tmp = __raw_readl(EXYNOS4_APLL_CON0);
tmp &= ~(0x7 << 0); tmp &= ~(0x7 << 0);
tmp |= (exynos4210_apll_pms_table[new_index] & 0x7); tmp |= apll_freq_4210[new_index].mps & 0x7;
__raw_writel(tmp, EXYNOS4_APLL_CON0); __raw_writel(tmp, EXYNOS4_APLL_CON0);
} else { } else {
/* Clock Configuration Procedure */ /* Clock Configuration Procedure */
@ -214,7 +149,7 @@ static void exynos4210_set_frequency(unsigned int old_index,
/* 1. Change just s value in apll m,p,s value */ /* 1. Change just s value in apll m,p,s value */
tmp = __raw_readl(EXYNOS4_APLL_CON0); tmp = __raw_readl(EXYNOS4_APLL_CON0);
tmp &= ~(0x7 << 0); tmp &= ~(0x7 << 0);
tmp |= (exynos4210_apll_pms_table[new_index] & 0x7); tmp |= apll_freq_4210[new_index].mps & 0x7;
__raw_writel(tmp, EXYNOS4_APLL_CON0); __raw_writel(tmp, EXYNOS4_APLL_CON0);
/* 2. Change the system clock divider values */ /* 2. Change the system clock divider values */
@ -231,8 +166,6 @@ static void exynos4210_set_frequency(unsigned int old_index,
int exynos4210_cpufreq_init(struct exynos_dvfs_info *info) int exynos4210_cpufreq_init(struct exynos_dvfs_info *info)
{ {
int i;
unsigned int tmp;
unsigned long rate; unsigned long rate;
cpu_clk = clk_get(NULL, "armclk"); cpu_clk = clk_get(NULL, "armclk");
@ -253,33 +186,9 @@ int exynos4210_cpufreq_init(struct exynos_dvfs_info *info)
if (IS_ERR(mout_apll)) if (IS_ERR(mout_apll))
goto err_mout_apll; 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;
}
info->mpll_freq_khz = rate; info->mpll_freq_khz = rate;
info->pm_lock_idx = L2; /* 800Mhz */
info->pll_safe_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->cpu_clk = cpu_clk;
info->volt_table = exynos4210_volt_table; info->volt_table = exynos4210_volt_table;
info->freq_table = exynos4210_freq_table; info->freq_table = exynos4210_freq_table;
@ -289,14 +198,11 @@ int exynos4210_cpufreq_init(struct exynos_dvfs_info *info)
return 0; return 0;
err_mout_apll: err_mout_apll:
if (!IS_ERR(mout_mpll)) clk_put(mout_mpll);
clk_put(mout_mpll);
err_mout_mpll: err_mout_mpll:
if (!IS_ERR(moutcore)) clk_put(moutcore);
clk_put(moutcore);
err_moutcore: err_moutcore:
if (!IS_ERR(cpu_clk)) clk_put(cpu_clk);
clk_put(cpu_clk);
pr_debug("%s: failed initialization\n", __func__); pr_debug("%s: failed initialization\n", __func__);
return -EINVAL; return -EINVAL;

388
drivers/cpufreq/exynos4x12-cpufreq.c
View file

@ -20,26 +20,18 @@
#include <mach/regs-clock.h> #include <mach/regs-clock.h>
#include <mach/cpufreq.h> #include <mach/cpufreq.h>
#define CPUFREQ_LEVEL_END (L13 + 1)
static int max_support_idx;
static int min_support_idx = (CPUFREQ_LEVEL_END - 1);
static struct clk *cpu_clk; static struct clk *cpu_clk;
static struct clk *moutcore; static struct clk *moutcore;
static struct clk *mout_mpll; static struct clk *mout_mpll;
static struct clk *mout_apll; static struct clk *mout_apll;
struct cpufreq_clkdiv { static unsigned int exynos4x12_volt_table[] = {
unsigned int index; 1350000, 1287500, 1250000, 1187500, 1137500, 1087500, 1037500,
unsigned int clkdiv; 1000000, 987500, 975000, 950000, 925000, 900000, 900000
unsigned int clkdiv1;
}; };
static unsigned int exynos4x12_volt_table[CPUFREQ_LEVEL_END];
static struct cpufreq_frequency_table exynos4x12_freq_table[] = { static struct cpufreq_frequency_table exynos4x12_freq_table[] = {
{L0, 1500 * 1000}, {L0, CPUFREQ_ENTRY_INVALID},
{L1, 1400 * 1000}, {L1, 1400 * 1000},
{L2, 1300 * 1000}, {L2, 1300 * 1000},
{L3, 1200 * 1000}, {L3, 1200 * 1000},
@ -56,247 +48,54 @@ static struct cpufreq_frequency_table exynos4x12_freq_table[] = {
{0, CPUFREQ_TABLE_END}, {0, CPUFREQ_TABLE_END},
}; };
static struct cpufreq_clkdiv exynos4x12_clkdiv_table[CPUFREQ_LEVEL_END]; static struct apll_freq *apll_freq_4x12;
static unsigned int clkdiv_cpu0_4212[CPUFREQ_LEVEL_END][8] = { static struct apll_freq apll_freq_4212[] = {
/* /*
* Clock divider value for following * values:
* { DIVCORE, DIVCOREM0, DIVCOREM1, DIVPERIPH, * freq
* DIVATB, DIVPCLK_DBG, DIVAPLL, DIVCORE2 } * clock divider for CORE, COREM0, COREM1, PERIPH, ATB, PCLK_DBG, APLL, CORE2
* clock divider for COPY, HPM, RESERVED
* PLL M, P, S
*/ */
/* ARM L0: 1500 MHz */ APLL_FREQ(1500, 0, 3, 7, 0, 6, 1, 2, 0, 6, 2, 0, 250, 4, 0),
{ 0, 3, 7, 0, 6, 1, 2, 0 }, APLL_FREQ(1400, 0, 3, 7, 0, 6, 1, 2, 0, 6, 2, 0, 175, 3, 0),
APLL_FREQ(1300, 0, 3, 7, 0, 5, 1, 2, 0, 5, 2, 0, 325, 6, 0),
/* ARM L1: 1400 MHz */ APLL_FREQ(1200, 0, 3, 7, 0, 5, 1, 2, 0, 5, 2, 0, 200, 4, 0),
{ 0, 3, 7, 0, 6, 1, 2, 0 }, APLL_FREQ(1100, 0, 3, 6, 0, 4, 1, 2, 0, 4, 2, 0, 275, 6, 0),
APLL_FREQ(1000, 0, 2, 5, 0, 4, 1, 1, 0, 4, 2, 0, 125, 3, 0),
/* ARM L2: 1300 MHz */ APLL_FREQ(900, 0, 2, 5, 0, 3, 1, 1, 0, 3, 2, 0, 150, 4, 0),
{ 0, 3, 7, 0, 5, 1, 2, 0 }, APLL_FREQ(800, 0, 2, 5, 0, 3, 1, 1, 0, 3, 2, 0, 100, 3, 0),
APLL_FREQ(700, 0, 2, 4, 0, 3, 1, 1, 0, 3, 2, 0, 175, 3, 1),
/* ARM L3: 1200 MHz */ APLL_FREQ(600, 0, 2, 4, 0, 3, 1, 1, 0, 3, 2, 0, 200, 4, 1),
{ 0, 3, 7, 0, 5, 1, 2, 0 }, APLL_FREQ(500, 0, 2, 4, 0, 3, 1, 1, 0, 3, 2, 0, 125, 3, 1),
APLL_FREQ(400, 0, 2, 4, 0, 3, 1, 1, 0, 3, 2, 0, 100, 3, 1),
/* ARM L4: 1100 MHz */ APLL_FREQ(300, 0, 2, 4, 0, 2, 1, 1, 0, 3, 2, 0, 200, 4, 2),
{ 0, 3, 6, 0, 4, 1, 2, 0 }, APLL_FREQ(200, 0, 1, 3, 0, 1, 1, 1, 0, 3, 2, 0, 100, 3, 2),
/* ARM L5: 1000 MHz */
{ 0, 2, 5, 0, 4, 1, 1, 0 },
/* ARM L6: 900 MHz */
{ 0, 2, 5, 0, 3, 1, 1, 0 },
/* ARM L7: 800 MHz */
{ 0, 2, 5, 0, 3, 1, 1, 0 },
/* ARM L8: 700 MHz */
{ 0, 2, 4, 0, 3, 1, 1, 0 },
/* ARM L9: 600 MHz */
{ 0, 2, 4, 0, 3, 1, 1, 0 },
/* ARM L10: 500 MHz */
{ 0, 2, 4, 0, 3, 1, 1, 0 },
/* ARM L11: 400 MHz */
{ 0, 2, 4, 0, 3, 1, 1, 0 },
/* ARM L12: 300 MHz */
{ 0, 2, 4, 0, 2, 1, 1, 0 },
/* ARM L13: 200 MHz */
{ 0, 1, 3, 0, 1, 1, 1, 0 },
}; };
static unsigned int clkdiv_cpu0_4412[CPUFREQ_LEVEL_END][8] = { static struct apll_freq apll_freq_4412[] = {
/* /*
* Clock divider value for following * values:
* { DIVCORE, DIVCOREM0, DIVCOREM1, DIVPERIPH, * freq
* DIVATB, DIVPCLK_DBG, DIVAPLL, DIVCORE2 } * clock divider for CORE, COREM0, COREM1, PERIPH, ATB, PCLK_DBG, APLL, CORE2
* clock divider for COPY, HPM, CORES
* PLL M, P, S
*/ */
/* ARM L0: 1500 MHz */ APLL_FREQ(1500, 0, 3, 7, 0, 6, 1, 2, 0, 6, 0, 7, 250, 4, 0),
{ 0, 3, 7, 0, 6, 1, 2, 0 }, APLL_FREQ(1400, 0, 3, 7, 0, 6, 1, 2, 0, 6, 0, 6, 175, 3, 0),
APLL_FREQ(1300, 0, 3, 7, 0, 5, 1, 2, 0, 5, 0, 6, 325, 6, 0),
/* ARM L1: 1400 MHz */ APLL_FREQ(1200, 0, 3, 7, 0, 5, 1, 2, 0, 5, 0, 5, 200, 4, 0),
{ 0, 3, 7, 0, 6, 1, 2, 0 }, APLL_FREQ(1100, 0, 3, 6, 0, 4, 1, 2, 0, 4, 0, 5, 275, 6, 0),
APLL_FREQ(1000, 0, 2, 5, 0, 4, 1, 1, 0, 4, 0, 4, 125, 3, 0),
/* ARM L2: 1300 MHz */ APLL_FREQ(900, 0, 2, 5, 0, 3, 1, 1, 0, 3, 0, 4, 150, 4, 0),
{ 0, 3, 7, 0, 5, 1, 2, 0 }, APLL_FREQ(800, 0, 2, 5, 0, 3, 1, 1, 0, 3, 0, 3, 100, 3, 0),
APLL_FREQ(700, 0, 2, 4, 0, 3, 1, 1, 0, 3, 0, 3, 175, 3, 1),
/* ARM L3: 1200 MHz */ APLL_FREQ(600, 0, 2, 4, 0, 3, 1, 1, 0, 3, 0, 2, 200, 4, 1),
{ 0, 3, 7, 0, 5, 1, 2, 0 }, APLL_FREQ(500, 0, 2, 4, 0, 3, 1, 1, 0, 3, 0, 2, 125, 3, 1),
APLL_FREQ(400, 0, 2, 4, 0, 3, 1, 1, 0, 3, 0, 1, 100, 3, 1),
/* ARM L4: 1100 MHz */ APLL_FREQ(300, 0, 2, 4, 0, 2, 1, 1, 0, 3, 0, 1, 200, 4, 2),
{ 0, 3, 6, 0, 4, 1, 2, 0 }, APLL_FREQ(200, 0, 1, 3, 0, 1, 1, 1, 0, 3, 0, 0, 100, 3, 2),
/* ARM L5: 1000 MHz */
{ 0, 2, 5, 0, 4, 1, 1, 0 },
/* ARM L6: 900 MHz */
{ 0, 2, 5, 0, 3, 1, 1, 0 },
/* ARM L7: 800 MHz */
{ 0, 2, 5, 0, 3, 1, 1, 0 },
/* ARM L8: 700 MHz */
{ 0, 2, 4, 0, 3, 1, 1, 0 },
/* ARM L9: 600 MHz */
{ 0, 2, 4, 0, 3, 1, 1, 0 },
/* ARM L10: 500 MHz */
{ 0, 2, 4, 0, 3, 1, 1, 0 },
/* ARM L11: 400 MHz */
{ 0, 2, 4, 0, 3, 1, 1, 0 },
/* ARM L12: 300 MHz */
{ 0, 2, 4, 0, 2, 1, 1, 0 },
/* ARM L13: 200 MHz */
{ 0, 1, 3, 0, 1, 1, 1, 0 },
};
static unsigned int clkdiv_cpu1_4212[CPUFREQ_LEVEL_END][2] = {
/* Clock divider value for following
* { DIVCOPY, DIVHPM }
*/
/* ARM L0: 1500 MHz */
{ 6, 0 },
/* ARM L1: 1400 MHz */
{ 6, 0 },
/* ARM L2: 1300 MHz */
{ 5, 0 },
/* ARM L3: 1200 MHz */
{ 5, 0 },
/* ARM L4: 1100 MHz */
{ 4, 0 },
/* ARM L5: 1000 MHz */
{ 4, 0 },
/* ARM L6: 900 MHz */
{ 3, 0 },
/* ARM L7: 800 MHz */
{ 3, 0 },
/* ARM L8: 700 MHz */
{ 3, 0 },
/* ARM L9: 600 MHz */
{ 3, 0 },
/* ARM L10: 500 MHz */
{ 3, 0 },
/* ARM L11: 400 MHz */
{ 3, 0 },
/* ARM L12: 300 MHz */
{ 3, 0 },
/* ARM L13: 200 MHz */
{ 3, 0 },
};
static unsigned int clkdiv_cpu1_4412[CPUFREQ_LEVEL_END][3] = {
/* Clock divider value for following
* { DIVCOPY, DIVHPM, DIVCORES }
*/
/* ARM L0: 1500 MHz */
{ 6, 0, 7 },
/* ARM L1: 1400 MHz */
{ 6, 0, 6 },
/* ARM L2: 1300 MHz */
{ 5, 0, 6 },
/* ARM L3: 1200 MHz */
{ 5, 0, 5 },
/* ARM L4: 1100 MHz */
{ 4, 0, 5 },
/* ARM L5: 1000 MHz */
{ 4, 0, 4 },
/* ARM L6: 900 MHz */
{ 3, 0, 4 },
/* ARM L7: 800 MHz */
{ 3, 0, 3 },
/* ARM L8: 700 MHz */
{ 3, 0, 3 },
/* ARM L9: 600 MHz */
{ 3, 0, 2 },
/* ARM L10: 500 MHz */
{ 3, 0, 2 },
/* ARM L11: 400 MHz */
{ 3, 0, 1 },
/* ARM L12: 300 MHz */
{ 3, 0, 1 },
/* ARM L13: 200 MHz */
{ 3, 0, 0 },
};
static unsigned int exynos4x12_apll_pms_table[CPUFREQ_LEVEL_END] = {
/* APLL FOUT L0: 1500 MHz */
((250 << 16) | (4 << 8) | (0x0)),
/* APLL FOUT L1: 1400 MHz */
((175 << 16) | (3 << 8) | (0x0)),
/* APLL FOUT L2: 1300 MHz */
((325 << 16) | (6 << 8) | (0x0)),
/* APLL FOUT L3: 1200 MHz */
((200 << 16) | (4 << 8) | (0x0)),
/* APLL FOUT L4: 1100 MHz */
((275 << 16) | (6 << 8) | (0x0)),
/* APLL FOUT L5: 1000 MHz */
((125 << 16) | (3 << 8) | (0x0)),
/* APLL FOUT L6: 900 MHz */
((150 << 16) | (4 << 8) | (0x0)),
/* APLL FOUT L7: 800 MHz */
((100 << 16) | (3 << 8) | (0x0)),
/* APLL FOUT L8: 700 MHz */
((175 << 16) | (3 << 8) | (0x1)),
/* APLL FOUT L9: 600 MHz */
((200 << 16) | (4 << 8) | (0x1)),
/* APLL FOUT L10: 500 MHz */
((125 << 16) | (3 << 8) | (0x1)),
/* APLL FOUT L11 400 MHz */
((100 << 16) | (3 << 8) | (0x1)),
/* APLL FOUT L12: 300 MHz */
((200 << 16) | (4 << 8) | (0x2)),
/* APLL FOUT L13: 200 MHz */
((100 << 16) | (3 << 8) | (0x2)),
};
static const unsigned int asv_voltage_4x12[CPUFREQ_LEVEL_END] = {
1350000, 1287500, 1250000, 1187500, 1137500, 1087500, 1037500,
1000000, 987500, 975000, 950000, 925000, 900000, 900000
}; };
static void exynos4x12_set_clkdiv(unsigned int div_index) static void exynos4x12_set_clkdiv(unsigned int div_index)
@ -306,7 +105,7 @@ static void exynos4x12_set_clkdiv(unsigned int div_index)
/* Change Divider - CPU0 */ /* Change Divider - CPU0 */
tmp = exynos4x12_clkdiv_table[div_index].clkdiv; tmp = apll_freq_4x12[div_index].clk_div_cpu0;
__raw_writel(tmp, EXYNOS4_CLKDIV_CPU); __raw_writel(tmp, EXYNOS4_CLKDIV_CPU);
@ -314,7 +113,7 @@ static void exynos4x12_set_clkdiv(unsigned int div_index)
cpu_relax(); cpu_relax();
/* Change Divider - CPU1 */ /* Change Divider - CPU1 */
tmp = exynos4x12_clkdiv_table[div_index].clkdiv1; tmp = apll_freq_4x12[div_index].clk_div_cpu1;
__raw_writel(tmp, EXYNOS4_CLKDIV_CPU1); __raw_writel(tmp, EXYNOS4_CLKDIV_CPU1);
if (soc_is_exynos4212()) if (soc_is_exynos4212())
@ -341,14 +140,14 @@ static void exynos4x12_set_apll(unsigned int index)
} while (tmp != 0x2); } while (tmp != 0x2);
/* 2. Set APLL Lock time */ /* 2. Set APLL Lock time */
pdiv = ((exynos4x12_apll_pms_table[index] >> 8) & 0x3f); pdiv = ((apll_freq_4x12[index].mps >> 8) & 0x3f);
__raw_writel((pdiv * 250), EXYNOS4_APLL_LOCK); __raw_writel((pdiv * 250), EXYNOS4_APLL_LOCK);
/* 3. Change PLL PMS values */ /* 3. Change PLL PMS values */
tmp = __raw_readl(EXYNOS4_APLL_CON0); tmp = __raw_readl(EXYNOS4_APLL_CON0);
tmp &= ~((0x3ff << 16) | (0x3f << 8) | (0x7 << 0)); tmp &= ~((0x3ff << 16) | (0x3f << 8) | (0x7 << 0));
tmp |= exynos4x12_apll_pms_table[index]; tmp |= apll_freq_4x12[index].mps;
__raw_writel(tmp, EXYNOS4_APLL_CON0); __raw_writel(tmp, EXYNOS4_APLL_CON0);
/* 4. wait_lock_time */ /* 4. wait_lock_time */
@ -367,10 +166,10 @@ static void exynos4x12_set_apll(unsigned int index)
} while (tmp != (0x1 << EXYNOS4_CLKSRC_CPU_MUXCORE_SHIFT)); } while (tmp != (0x1 << EXYNOS4_CLKSRC_CPU_MUXCORE_SHIFT));
} }
bool exynos4x12_pms_change(unsigned int old_index, unsigned int new_index) static bool exynos4x12_pms_change(unsigned int old_index, unsigned int new_index)
{ {
unsigned int old_pm = exynos4x12_apll_pms_table[old_index] >> 8; unsigned int old_pm = apll_freq_4x12[old_index].mps >> 8;
unsigned int new_pm = exynos4x12_apll_pms_table[new_index] >> 8; unsigned int new_pm = apll_freq_4x12[new_index].mps >> 8;
return (old_pm == new_pm) ? 0 : 1; return (old_pm == new_pm) ? 0 : 1;
} }
@ -387,7 +186,7 @@ static void exynos4x12_set_frequency(unsigned int old_index,
/* 2. Change just s value in apll m,p,s value */ /* 2. Change just s value in apll m,p,s value */
tmp = __raw_readl(EXYNOS4_APLL_CON0); tmp = __raw_readl(EXYNOS4_APLL_CON0);
tmp &= ~(0x7 << 0); tmp &= ~(0x7 << 0);
tmp |= (exynos4x12_apll_pms_table[new_index] & 0x7); tmp |= apll_freq_4x12[new_index].mps & 0x7;
__raw_writel(tmp, EXYNOS4_APLL_CON0); __raw_writel(tmp, EXYNOS4_APLL_CON0);
} else { } else {
@ -402,7 +201,7 @@ static void exynos4x12_set_frequency(unsigned int old_index,
/* 1. Change just s value in apll m,p,s value */ /* 1. Change just s value in apll m,p,s value */
tmp = __raw_readl(EXYNOS4_APLL_CON0); tmp = __raw_readl(EXYNOS4_APLL_CON0);
tmp &= ~(0x7 << 0); tmp &= ~(0x7 << 0);
tmp |= (exynos4x12_apll_pms_table[new_index] & 0x7); tmp |= apll_freq_4x12[new_index].mps & 0x7;
__raw_writel(tmp, EXYNOS4_APLL_CON0); __raw_writel(tmp, EXYNOS4_APLL_CON0);
/* 2. Change the system clock divider values */ /* 2. Change the system clock divider values */
exynos4x12_set_clkdiv(new_index); exynos4x12_set_clkdiv(new_index);
@ -416,27 +215,10 @@ static void exynos4x12_set_frequency(unsigned int old_index,
} }
} }
static void __init set_volt_table(void)
{
unsigned int i;
max_support_idx = L1;
/* Not supported */
exynos4x12_freq_table[L0].frequency = CPUFREQ_ENTRY_INVALID;
for (i = 0 ; i < CPUFREQ_LEVEL_END ; i++)
exynos4x12_volt_table[i] = asv_voltage_4x12[i];
}
int exynos4x12_cpufreq_init(struct exynos_dvfs_info *info) int exynos4x12_cpufreq_init(struct exynos_dvfs_info *info)
{ {
int i;
unsigned int tmp;
unsigned long rate; unsigned long rate;
set_volt_table();
cpu_clk = clk_get(NULL, "armclk"); cpu_clk = clk_get(NULL, "armclk");
if (IS_ERR(cpu_clk)) if (IS_ERR(cpu_clk))
return PTR_ERR(cpu_clk); return PTR_ERR(cpu_clk);
@ -455,66 +237,14 @@ int exynos4x12_cpufreq_init(struct exynos_dvfs_info *info)
if (IS_ERR(mout_apll)) if (IS_ERR(mout_apll))
goto err_mout_apll; goto err_mout_apll;
for (i = L0; i < CPUFREQ_LEVEL_END; i++) { if (soc_is_exynos4212())
apll_freq_4x12 = apll_freq_4212;
exynos4x12_clkdiv_table[i].index = i; else
apll_freq_4x12 = apll_freq_4412;
tmp = __raw_readl(EXYNOS4_CLKDIV_CPU);
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);
if (soc_is_exynos4212()) {
tmp |= ((clkdiv_cpu0_4212[i][0] << EXYNOS4_CLKDIV_CPU0_CORE_SHIFT) |
(clkdiv_cpu0_4212[i][1] << EXYNOS4_CLKDIV_CPU0_COREM0_SHIFT) |
(clkdiv_cpu0_4212[i][2] << EXYNOS4_CLKDIV_CPU0_COREM1_SHIFT) |
(clkdiv_cpu0_4212[i][3] << EXYNOS4_CLKDIV_CPU0_PERIPH_SHIFT) |
(clkdiv_cpu0_4212[i][4] << EXYNOS4_CLKDIV_CPU0_ATB_SHIFT) |
(clkdiv_cpu0_4212[i][5] << EXYNOS4_CLKDIV_CPU0_PCLKDBG_SHIFT) |
(clkdiv_cpu0_4212[i][6] << EXYNOS4_CLKDIV_CPU0_APLL_SHIFT));
} else {
tmp &= ~EXYNOS4_CLKDIV_CPU0_CORE2_MASK;
tmp |= ((clkdiv_cpu0_4412[i][0] << EXYNOS4_CLKDIV_CPU0_CORE_SHIFT) |
(clkdiv_cpu0_4412[i][1] << EXYNOS4_CLKDIV_CPU0_COREM0_SHIFT) |
(clkdiv_cpu0_4412[i][2] << EXYNOS4_CLKDIV_CPU0_COREM1_SHIFT) |
(clkdiv_cpu0_4412[i][3] << EXYNOS4_CLKDIV_CPU0_PERIPH_SHIFT) |
(clkdiv_cpu0_4412[i][4] << EXYNOS4_CLKDIV_CPU0_ATB_SHIFT) |
(clkdiv_cpu0_4412[i][5] << EXYNOS4_CLKDIV_CPU0_PCLKDBG_SHIFT) |
(clkdiv_cpu0_4412[i][6] << EXYNOS4_CLKDIV_CPU0_APLL_SHIFT) |
(clkdiv_cpu0_4412[i][7] << EXYNOS4_CLKDIV_CPU0_CORE2_SHIFT));
}
exynos4x12_clkdiv_table[i].clkdiv = tmp;
tmp = __raw_readl(EXYNOS4_CLKDIV_CPU1);
if (soc_is_exynos4212()) {
tmp &= ~(EXYNOS4_CLKDIV_CPU1_COPY_MASK |
EXYNOS4_CLKDIV_CPU1_HPM_MASK);
tmp |= ((clkdiv_cpu1_4212[i][0] << EXYNOS4_CLKDIV_CPU1_COPY_SHIFT) |
(clkdiv_cpu1_4212[i][1] << EXYNOS4_CLKDIV_CPU1_HPM_SHIFT));
} else {
tmp &= ~(EXYNOS4_CLKDIV_CPU1_COPY_MASK |
EXYNOS4_CLKDIV_CPU1_HPM_MASK |
EXYNOS4_CLKDIV_CPU1_CORES_MASK);
tmp |= ((clkdiv_cpu1_4412[i][0] << EXYNOS4_CLKDIV_CPU1_COPY_SHIFT) |
(clkdiv_cpu1_4412[i][1] << EXYNOS4_CLKDIV_CPU1_HPM_SHIFT) |
(clkdiv_cpu1_4412[i][2] << EXYNOS4_CLKDIV_CPU1_CORES_SHIFT));
}
exynos4x12_clkdiv_table[i].clkdiv1 = tmp;
}
info->mpll_freq_khz = rate; info->mpll_freq_khz = rate;
info->pm_lock_idx = L5; /* 800Mhz */
info->pll_safe_idx = L7; info->pll_safe_idx = L7;
info->max_support_idx = max_support_idx;
info->min_support_idx = min_support_idx;
info->cpu_clk = cpu_clk; info->cpu_clk = cpu_clk;
info->volt_table = exynos4x12_volt_table; info->volt_table = exynos4x12_volt_table;
info->freq_table = exynos4x12_freq_table; info->freq_table = exynos4x12_freq_table;

178
drivers/cpufreq/exynos5250-cpufreq.c
View file

@ -21,23 +21,18 @@
#include <mach/regs-clock.h> #include <mach/regs-clock.h>
#include <mach/cpufreq.h> #include <mach/cpufreq.h>
#define CPUFREQ_LEVEL_END (L15 + 1)
static int max_support_idx;
static int min_support_idx = (CPUFREQ_LEVEL_END - 1);
static struct clk *cpu_clk; static struct clk *cpu_clk;
static struct clk *moutcore; static struct clk *moutcore;
static struct clk *mout_mpll; static struct clk *mout_mpll;
static struct clk *mout_apll; static struct clk *mout_apll;
struct cpufreq_clkdiv { static unsigned int exynos5250_volt_table[] = {
unsigned int index; 1300000, 1250000, 1225000, 1200000, 1150000,
unsigned int clkdiv; 1125000, 1100000, 1075000, 1050000, 1025000,
unsigned int clkdiv1; 1012500, 1000000, 975000, 950000, 937500,
925000
}; };
static unsigned int exynos5250_volt_table[CPUFREQ_LEVEL_END];
static struct cpufreq_frequency_table exynos5250_freq_table[] = { static struct cpufreq_frequency_table exynos5250_freq_table[] = {
{L0, 1700 * 1000}, {L0, 1700 * 1000},
{L1, 1600 * 1000}, {L1, 1600 * 1000},
@ -47,8 +42,8 @@ static struct cpufreq_frequency_table exynos5250_freq_table[] = {
{L5, 1200 * 1000}, {L5, 1200 * 1000},
{L6, 1100 * 1000}, {L6, 1100 * 1000},
{L7, 1000 * 1000}, {L7, 1000 * 1000},
{L8, 900 * 1000}, {L8, 900 * 1000},
{L9, 800 * 1000}, {L9, 800 * 1000},
{L10, 700 * 1000}, {L10, 700 * 1000},
{L11, 600 * 1000}, {L11, 600 * 1000},
{L12, 500 * 1000}, {L12, 500 * 1000},
@ -58,78 +53,30 @@ static struct cpufreq_frequency_table exynos5250_freq_table[] = {
{0, CPUFREQ_TABLE_END}, {0, CPUFREQ_TABLE_END},
}; };
static struct cpufreq_clkdiv exynos5250_clkdiv_table[CPUFREQ_LEVEL_END]; static struct apll_freq apll_freq_5250[] = {
static unsigned int clkdiv_cpu0_5250[CPUFREQ_LEVEL_END][8] = {
/* /*
* Clock divider value for following * values:
* { ARM, CPUD, ACP, PERIPH, ATB, PCLK_DBG, APLL, ARM2 } * freq
* clock divider for ARM, CPUD, ACP, PERIPH, ATB, PCLK_DBG, APLL, ARM2
* clock divider for COPY, HPM, RESERVED
* PLL M, P, S
*/ */
{ 0, 3, 7, 7, 7, 3, 5, 0 }, /* 1700 MHz */ APLL_FREQ(1700, 0, 3, 7, 7, 7, 3, 5, 0, 0, 2, 0, 425, 6, 0),
{ 0, 3, 7, 7, 7, 1, 4, 0 }, /* 1600 MHz */ APLL_FREQ(1600, 0, 3, 7, 7, 7, 1, 4, 0, 0, 2, 0, 200, 3, 0),
{ 0, 2, 7, 7, 7, 1, 4, 0 }, /* 1500 MHz */ APLL_FREQ(1500, 0, 2, 7, 7, 7, 1, 4, 0, 0, 2, 0, 250, 4, 0),
{ 0, 2, 7, 7, 6, 1, 4, 0 }, /* 1400 MHz */ APLL_FREQ(1400, 0, 2, 7, 7, 6, 1, 4, 0, 0, 2, 0, 175, 3, 0),
{ 0, 2, 7, 7, 6, 1, 3, 0 }, /* 1300 MHz */ APLL_FREQ(1300, 0, 2, 7, 7, 6, 1, 3, 0, 0, 2, 0, 325, 6, 0),
{ 0, 2, 7, 7, 5, 1, 3, 0 }, /* 1200 MHz */ APLL_FREQ(1200, 0, 2, 7, 7, 5, 1, 3, 0, 0, 2, 0, 200, 4, 0),
{ 0, 3, 7, 7, 5, 1, 3, 0 }, /* 1100 MHz */ APLL_FREQ(1100, 0, 3, 7, 7, 5, 1, 3, 0, 0, 2, 0, 275, 6, 0),
{ 0, 1, 7, 7, 4, 1, 2, 0 }, /* 1000 MHz */ APLL_FREQ(1000, 0, 1, 7, 7, 4, 1, 2, 0, 0, 2, 0, 125, 3, 0),
{ 0, 1, 7, 7, 4, 1, 2, 0 }, /* 900 MHz */ APLL_FREQ(900, 0, 1, 7, 7, 4, 1, 2, 0, 0, 2, 0, 150, 4, 0),
{ 0, 1, 7, 7, 4, 1, 2, 0 }, /* 800 MHz */ APLL_FREQ(800, 0, 1, 7, 7, 4, 1, 2, 0, 0, 2, 0, 100, 3, 0),
{ 0, 1, 7, 7, 3, 1, 1, 0 }, /* 700 MHz */ APLL_FREQ(700, 0, 1, 7, 7, 3, 1, 1, 0, 0, 2, 0, 175, 3, 1),
{ 0, 1, 7, 7, 3, 1, 1, 0 }, /* 600 MHz */ APLL_FREQ(600, 0, 1, 7, 7, 3, 1, 1, 0, 0, 2, 0, 200, 4, 1),
{ 0, 1, 7, 7, 2, 1, 1, 0 }, /* 500 MHz */ APLL_FREQ(500, 0, 1, 7, 7, 2, 1, 1, 0, 0, 2, 0, 125, 3, 1),
{ 0, 1, 7, 7, 2, 1, 1, 0 }, /* 400 MHz */ APLL_FREQ(400, 0, 1, 7, 7, 2, 1, 1, 0, 0, 2, 0, 100, 3, 1),
{ 0, 1, 7, 7, 1, 1, 1, 0 }, /* 300 MHz */ APLL_FREQ(300, 0, 1, 7, 7, 1, 1, 1, 0, 0, 2, 0, 200, 4, 2),
{ 0, 1, 7, 7, 1, 1, 1, 0 }, /* 200 MHz */ APLL_FREQ(200, 0, 1, 7, 7, 1, 1, 1, 0, 0, 2, 0, 100, 3, 2),
};
static unsigned int clkdiv_cpu1_5250[CPUFREQ_LEVEL_END][2] = {
/* Clock divider value for following
* { COPY, HPM }
*/
{ 0, 2 }, /* 1700 MHz */
{ 0, 2 }, /* 1600 MHz */
{ 0, 2 }, /* 1500 MHz */
{ 0, 2 }, /* 1400 MHz */
{ 0, 2 }, /* 1300 MHz */
{ 0, 2 }, /* 1200 MHz */
{ 0, 2 }, /* 1100 MHz */
{ 0, 2 }, /* 1000 MHz */
{ 0, 2 }, /* 900 MHz */
{ 0, 2 }, /* 800 MHz */
{ 0, 2 }, /* 700 MHz */
{ 0, 2 }, /* 600 MHz */
{ 0, 2 }, /* 500 MHz */
{ 0, 2 }, /* 400 MHz */
{ 0, 2 }, /* 300 MHz */
{ 0, 2 }, /* 200 MHz */
};
static unsigned int exynos5_apll_pms_table[CPUFREQ_LEVEL_END] = {
((425 << 16) | (6 << 8) | 0), /* 1700 MHz */
((200 << 16) | (3 << 8) | 0), /* 1600 MHz */
((250 << 16) | (4 << 8) | 0), /* 1500 MHz */
((175 << 16) | (3 << 8) | 0), /* 1400 MHz */
((325 << 16) | (6 << 8) | 0), /* 1300 MHz */
((200 << 16) | (4 << 8) | 0), /* 1200 MHz */
((275 << 16) | (6 << 8) | 0), /* 1100 MHz */
((125 << 16) | (3 << 8) | 0), /* 1000 MHz */
((150 << 16) | (4 << 8) | 0), /* 900 MHz */
((100 << 16) | (3 << 8) | 0), /* 800 MHz */
((175 << 16) | (3 << 8) | 1), /* 700 MHz */
((200 << 16) | (4 << 8) | 1), /* 600 MHz */
((125 << 16) | (3 << 8) | 1), /* 500 MHz */
((100 << 16) | (3 << 8) | 1), /* 400 MHz */
((200 << 16) | (4 << 8) | 2), /* 300 MHz */
((100 << 16) | (3 << 8) | 2), /* 200 MHz */
};
/* ASV group voltage table */
static const unsigned int asv_voltage_5250[CPUFREQ_LEVEL_END] = {
1300000, 1250000, 1225000, 1200000, 1150000,
1125000, 1100000, 1075000, 1050000, 1025000,
1012500, 1000000, 975000, 950000, 937500,
925000
}; };
static void set_clkdiv(unsigned int div_index) static void set_clkdiv(unsigned int div_index)
@ -138,7 +85,7 @@ static void set_clkdiv(unsigned int div_index)
/* Change Divider - CPU0 */ /* Change Divider - CPU0 */
tmp = exynos5250_clkdiv_table[div_index].clkdiv; tmp = apll_freq_5250[div_index].clk_div_cpu0;
__raw_writel(tmp, EXYNOS5_CLKDIV_CPU0); __raw_writel(tmp, EXYNOS5_CLKDIV_CPU0);
@ -146,7 +93,7 @@ static void set_clkdiv(unsigned int div_index)
cpu_relax(); cpu_relax();
/* Change Divider - CPU1 */ /* Change Divider - CPU1 */
tmp = exynos5250_clkdiv_table[div_index].clkdiv1; tmp = apll_freq_5250[div_index].clk_div_cpu1;
__raw_writel(tmp, EXYNOS5_CLKDIV_CPU1); __raw_writel(tmp, EXYNOS5_CLKDIV_CPU1);
@ -169,14 +116,14 @@ static void set_apll(unsigned int new_index,
} while (tmp != 0x2); } while (tmp != 0x2);
/* 2. Set APLL Lock time */ /* 2. Set APLL Lock time */
pdiv = ((exynos5_apll_pms_table[new_index] >> 8) & 0x3f); pdiv = ((apll_freq_5250[new_index].mps >> 8) & 0x3f);
__raw_writel((pdiv * 250), EXYNOS5_APLL_LOCK); __raw_writel((pdiv * 250), EXYNOS5_APLL_LOCK);
/* 3. Change PLL PMS values */ /* 3. Change PLL PMS values */
tmp = __raw_readl(EXYNOS5_APLL_CON0); tmp = __raw_readl(EXYNOS5_APLL_CON0);
tmp &= ~((0x3ff << 16) | (0x3f << 8) | (0x7 << 0)); tmp &= ~((0x3ff << 16) | (0x3f << 8) | (0x7 << 0));
tmp |= exynos5_apll_pms_table[new_index]; tmp |= apll_freq_5250[new_index].mps;
__raw_writel(tmp, EXYNOS5_APLL_CON0); __raw_writel(tmp, EXYNOS5_APLL_CON0);
/* 4. wait_lock_time */ /* 4. wait_lock_time */
@ -196,10 +143,10 @@ static void set_apll(unsigned int new_index,
} }
bool exynos5250_pms_change(unsigned int old_index, unsigned int new_index) static bool exynos5250_pms_change(unsigned int old_index, unsigned int new_index)
{ {
unsigned int old_pm = (exynos5_apll_pms_table[old_index] >> 8); unsigned int old_pm = apll_freq_5250[old_index].mps >> 8;
unsigned int new_pm = (exynos5_apll_pms_table[new_index] >> 8); unsigned int new_pm = apll_freq_5250[new_index].mps >> 8;
return (old_pm == new_pm) ? 0 : 1; return (old_pm == new_pm) ? 0 : 1;
} }
@ -216,7 +163,7 @@ static void exynos5250_set_frequency(unsigned int old_index,
/* 2. Change just s value in apll m,p,s value */ /* 2. Change just s value in apll m,p,s value */
tmp = __raw_readl(EXYNOS5_APLL_CON0); tmp = __raw_readl(EXYNOS5_APLL_CON0);
tmp &= ~(0x7 << 0); tmp &= ~(0x7 << 0);
tmp |= (exynos5_apll_pms_table[new_index] & 0x7); tmp |= apll_freq_5250[new_index].mps & 0x7;
__raw_writel(tmp, EXYNOS5_APLL_CON0); __raw_writel(tmp, EXYNOS5_APLL_CON0);
} else { } else {
@ -231,7 +178,7 @@ static void exynos5250_set_frequency(unsigned int old_index,
/* 1. Change just s value in apll m,p,s value */ /* 1. Change just s value in apll m,p,s value */
tmp = __raw_readl(EXYNOS5_APLL_CON0); tmp = __raw_readl(EXYNOS5_APLL_CON0);
tmp &= ~(0x7 << 0); tmp &= ~(0x7 << 0);
tmp |= (exynos5_apll_pms_table[new_index] & 0x7); tmp |= apll_freq_5250[new_index].mps & 0x7;
__raw_writel(tmp, EXYNOS5_APLL_CON0); __raw_writel(tmp, EXYNOS5_APLL_CON0);
/* 2. Change the system clock divider values */ /* 2. Change the system clock divider values */
set_clkdiv(new_index); set_clkdiv(new_index);
@ -245,24 +192,10 @@ static void exynos5250_set_frequency(unsigned int old_index,
} }
} }
static void __init set_volt_table(void)
{
unsigned int i;
max_support_idx = L0;
for (i = 0 ; i < CPUFREQ_LEVEL_END ; i++)
exynos5250_volt_table[i] = asv_voltage_5250[i];
}
int exynos5250_cpufreq_init(struct exynos_dvfs_info *info) int exynos5250_cpufreq_init(struct exynos_dvfs_info *info)
{ {
int i;
unsigned int tmp;
unsigned long rate; unsigned long rate;
set_volt_table();
cpu_clk = clk_get(NULL, "armclk"); cpu_clk = clk_get(NULL, "armclk");
if (IS_ERR(cpu_clk)) if (IS_ERR(cpu_clk))
return PTR_ERR(cpu_clk); return PTR_ERR(cpu_clk);
@ -281,44 +214,9 @@ int exynos5250_cpufreq_init(struct exynos_dvfs_info *info)
if (IS_ERR(mout_apll)) if (IS_ERR(mout_apll))
goto err_mout_apll; goto err_mout_apll;
for (i = L0; i < CPUFREQ_LEVEL_END; i++) {
exynos5250_clkdiv_table[i].index = i;
tmp = __raw_readl(EXYNOS5_CLKDIV_CPU0);
tmp &= ~((0x7 << 0) | (0x7 << 4) | (0x7 << 8) |
(0x7 << 12) | (0x7 << 16) | (0x7 << 20) |
(0x7 << 24) | (0x7 << 28));
tmp |= ((clkdiv_cpu0_5250[i][0] << 0) |
(clkdiv_cpu0_5250[i][1] << 4) |
(clkdiv_cpu0_5250[i][2] << 8) |
(clkdiv_cpu0_5250[i][3] << 12) |
(clkdiv_cpu0_5250[i][4] << 16) |
(clkdiv_cpu0_5250[i][5] << 20) |
(clkdiv_cpu0_5250[i][6] << 24) |
(clkdiv_cpu0_5250[i][7] << 28));
exynos5250_clkdiv_table[i].clkdiv = tmp;
tmp = __raw_readl(EXYNOS5_CLKDIV_CPU1);
tmp &= ~((0x7 << 0) | (0x7 << 4));
tmp |= ((clkdiv_cpu1_5250[i][0] << 0) |
(clkdiv_cpu1_5250[i][1] << 4));
exynos5250_clkdiv_table[i].clkdiv1 = tmp;
}
info->mpll_freq_khz = rate; info->mpll_freq_khz = rate;
/* 1000Mhz */
info->pm_lock_idx = L7;
/* 800Mhz */ /* 800Mhz */
info->pll_safe_idx = L9; info->pll_safe_idx = L9;
info->max_support_idx = max_support_idx;
info->min_support_idx = min_support_idx;
info->cpu_clk = cpu_clk; info->cpu_clk = cpu_clk;
info->volt_table = exynos5250_volt_table; info->volt_table = exynos5250_volt_table;
info->freq_table = exynos5250_freq_table; info->freq_table = exynos5250_freq_table;