Commit e8b4c198 authored by Jonghwan Choi's avatar Jonghwan Choi Committed by Dave Jones

[CPUFREQ] S5PV210: Add arm/int voltage control support

Signed-off-by: default avatarJonghwan Choi <jhbird.choi@samsung.com>
Signed-off-by: default avatarKukjin Kim <kgene.kim@samsung.com>
Signed-off-by: default avatarDave Jones <davej@redhat.com>
parent 90d5d0a1
...@@ -16,6 +16,7 @@ ...@@ -16,6 +16,7 @@
#include <linux/clk.h> #include <linux/clk.h>
#include <linux/io.h> #include <linux/io.h>
#include <linux/cpufreq.h> #include <linux/cpufreq.h>
#include <linux/regulator/consumer.h>
#include <mach/map.h> #include <mach/map.h>
#include <mach/regs-clock.h> #include <mach/regs-clock.h>
...@@ -77,6 +78,40 @@ static struct cpufreq_frequency_table s5pv210_freq_table[] = { ...@@ -77,6 +78,40 @@ static struct cpufreq_frequency_table s5pv210_freq_table[] = {
{0, CPUFREQ_TABLE_END}, {0, CPUFREQ_TABLE_END},
}; };
static struct regulator *arm_regulator;
static struct regulator *int_regulator;
struct s5pv210_dvs_conf {
int arm_volt; /* uV */
int int_volt; /* uV */
};
static const int arm_volt_max = 1350000;
static const int int_volt_max = 1250000;
static struct s5pv210_dvs_conf dvs_conf[] = {
[L0] = {
.arm_volt = 1250000,
.int_volt = 1100000,
},
[L1] = {
.arm_volt = 1200000,
.int_volt = 1100000,
},
[L2] = {
.arm_volt = 1050000,
.int_volt = 1100000,
},
[L3] = {
.arm_volt = 950000,
.int_volt = 1100000,
},
[L4] = {
.arm_volt = 950000,
.int_volt = 1000000,
},
};
static u32 clkdiv_val[5][11] = { static u32 clkdiv_val[5][11] = {
/* /*
* Clock divider value for following * Clock divider value for following
...@@ -157,6 +192,8 @@ static int s5pv210_target(struct cpufreq_policy *policy, ...@@ -157,6 +192,8 @@ static int s5pv210_target(struct cpufreq_policy *policy,
unsigned int index, priv_index; unsigned int index, priv_index;
unsigned int pll_changing = 0; unsigned int pll_changing = 0;
unsigned int bus_speed_changing = 0; unsigned int bus_speed_changing = 0;
int arm_volt, int_volt;
int ret = 0;
if (relation & ENABLE_FURTHER_CPUFREQ) if (relation & ENABLE_FURTHER_CPUFREQ)
no_cpufreq_access = false; no_cpufreq_access = false;
...@@ -191,12 +228,23 @@ static int s5pv210_target(struct cpufreq_policy *policy, ...@@ -191,12 +228,23 @@ static int s5pv210_target(struct cpufreq_policy *policy,
freqs.old, relation, &priv_index)) freqs.old, relation, &priv_index))
return -EINVAL; return -EINVAL;
cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE); arm_volt = dvs_conf[index].arm_volt;
int_volt = dvs_conf[index].int_volt;
if (freqs.new > freqs.old) { if (freqs.new > freqs.old) {
/* Voltage up: will be implemented */ ret = regulator_set_voltage(arm_regulator,
arm_volt, arm_volt_max);
if (ret)
return ret;
ret = regulator_set_voltage(int_regulator,
int_volt, int_volt_max);
if (ret)
return ret;
} }
cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
/* Check if there need to change PLL */ /* Check if there need to change PLL */
if ((index == L0) || (priv_index == L0)) if ((index == L0) || (priv_index == L0))
pll_changing = 1; pll_changing = 1;
...@@ -408,7 +456,11 @@ static int s5pv210_target(struct cpufreq_policy *policy, ...@@ -408,7 +456,11 @@ static int s5pv210_target(struct cpufreq_policy *policy,
} }
if (freqs.new < freqs.old) { if (freqs.new < freqs.old) {
/* Voltage down: will be implemented */ regulator_set_voltage(int_regulator,
int_volt, int_volt_max);
regulator_set_voltage(arm_regulator,
arm_volt, arm_volt_max);
} }
cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE); cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
...@@ -515,6 +567,19 @@ static struct cpufreq_driver s5pv210_driver = { ...@@ -515,6 +567,19 @@ static struct cpufreq_driver s5pv210_driver = {
static int __init s5pv210_cpufreq_init(void) static int __init s5pv210_cpufreq_init(void)
{ {
arm_regulator = regulator_get(NULL, "vddarm");
if (IS_ERR(arm_regulator)) {
pr_err("failed to get regulator vddarm");
return PTR_ERR(arm_regulator);
}
int_regulator = regulator_get(NULL, "vddint");
if (IS_ERR(int_regulator)) {
pr_err("failed to get regulator vddint");
regulator_put(arm_regulator);
return PTR_ERR(int_regulator);
}
return cpufreq_register_driver(&s5pv210_driver); return cpufreq_register_driver(&s5pv210_driver);
} }
......
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