From: Jonghwan Choi <jhbird.choi@xxxxxxxxxxx>
Signed-off-by: Jonghwan Choi <jhbird.choi@xxxxxxxxxxx>
Signed-off-by: Kukjin Kim <kgene.kim@xxxxxxxxxxx>
---
drivers/cpufreq/s5pv210-cpufreq.c | 75 ++++++++++++++++++++++++++++++++++++-
1 files changed, 74 insertions(+), 1 deletions(-)
diff --git a/drivers/cpufreq/s5pv210-cpufreq.c b/drivers/cpufreq/s5pv210-cpufreq.c
index 48a4a90..d2b3d25 100644
--- a/drivers/cpufreq/s5pv210-cpufreq.c
+++ b/drivers/cpufreq/s5pv210-cpufreq.c
@@ -16,6 +16,7 @@
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/cpufreq.h>
+#include <linux/regulator/consumer.h>
#include <mach/map.h>
#include <mach/regs-clock.h>
@@ -77,6 +78,40 @@ static struct cpufreq_frequency_table s5pv210_freq_table[] = {
{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] = {
/*
* Clock divider value for following
@@ -157,6 +192,8 @@ static int s5pv210_target(struct cpufreq_policy *policy,
unsigned int index, priv_index;
unsigned int pll_changing = 0;
unsigned int bus_speed_changing = 0;
+ int arm_volt, int_volt;
+ int ret = 0;
if (relation & ENABLE_FURTHER_CPUFREQ)
no_cpufreq_access = false;
@@ -191,12 +228,27 @@ static int s5pv210_target(struct cpufreq_policy *policy,
freqs.old, relation, &priv_index))
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) {
/* Voltage up: will be implemented */
+ if (!IS_ERR(arm_regulator) &&
+ !IS_ERR(int_regulator)) {
+ 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 */
if ((index == L0) || (priv_index == L0))
pll_changing = 1;
@@ -409,6 +461,14 @@ static int s5pv210_target(struct cpufreq_policy *policy,
if (freqs.new < freqs.old) {
/* Voltage down: will be implemented */
+ if (!IS_ERR(arm_regulator) &&
+ !IS_ERR(int_regulator)) {
+ 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);
@@ -515,6 +575,19 @@ static struct cpufreq_driver s5pv210_driver = {
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);
}
--
1.7.1
--
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