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path: root/drivers/cpufreq/exynos-cpufreq.c
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Diffstat (limited to 'drivers/cpufreq/exynos-cpufreq.c')
-rw-r--r--drivers/cpufreq/exynos-cpufreq.c87
1 files changed, 17 insertions, 70 deletions
diff --git a/drivers/cpufreq/exynos-cpufreq.c b/drivers/cpufreq/exynos-cpufreq.c
index 0fac34439e31..f3c22874da75 100644
--- a/drivers/cpufreq/exynos-cpufreq.c
+++ b/drivers/cpufreq/exynos-cpufreq.c
@@ -25,18 +25,11 @@
static struct exynos_dvfs_info *exynos_info;
static struct regulator *arm_regulator;
-static struct cpufreq_freqs freqs;
static unsigned int locking_frequency;
static bool frequency_locked;
static DEFINE_MUTEX(cpufreq_lock);
-static int exynos_verify_speed(struct cpufreq_policy *policy)
-{
- return cpufreq_frequency_table_verify(policy,
- exynos_info->freq_table);
-}
-
static unsigned int exynos_getspeed(unsigned int cpu)
{
return clk_get_rate(exynos_info->cpu_clk) / 1000;
@@ -65,21 +58,18 @@ static int exynos_cpufreq_scale(unsigned int target_freq)
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 old_freq;
int index, old_index;
int ret = 0;
- freqs.old = policy->cur;
- freqs.new = target_freq;
-
- if (freqs.new == freqs.old)
- goto out;
+ old_freq = policy->cur;
/*
* The policy max have been changed so that we cannot get proper
* 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 frequency table.
*/
- old_index = exynos_cpufreq_get_index(freqs.old);
+ old_index = exynos_cpufreq_get_index(old_freq);
if (old_index < 0) {
ret = old_index;
goto out;
@@ -104,17 +94,14 @@ static int exynos_cpufreq_scale(unsigned int target_freq)
}
arm_volt = volt_table[index];
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
-
/* When the new frequency is higher than current frequency */
- if ((freqs.new > freqs.old) && !safe_arm_volt) {
+ if ((target_freq > old_freq) && !safe_arm_volt) {
/* Firstly, voltage up to increase frequency */
ret = regulator_set_voltage(arm_regulator, arm_volt, arm_volt);
if (ret) {
pr_err("%s: failed to set cpu voltage to %d\n",
__func__, arm_volt);
- freqs.new = freqs.old;
- goto post_notify;
+ return ret;
}
}
@@ -124,24 +111,17 @@ static int exynos_cpufreq_scale(unsigned int target_freq)
if (ret) {
pr_err("%s: failed to set cpu voltage to %d\n",
__func__, safe_arm_volt);
- freqs.new = freqs.old;
- goto post_notify;
+ return ret;
}
}
exynos_info->set_freq(old_index, index);
-post_notify:
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
-
- if (ret)
- goto out;
-
/* When the new frequency is lower than current frequency */
- if ((freqs.new < freqs.old) ||
- ((freqs.new > freqs.old) && safe_arm_volt)) {
+ if ((target_freq < old_freq) ||
+ ((target_freq > old_freq) && safe_arm_volt)) {
/* down the voltage after frequency change */
- regulator_set_voltage(arm_regulator, arm_volt,
+ ret = regulator_set_voltage(arm_regulator, arm_volt,
arm_volt);
if (ret) {
pr_err("%s: failed to set cpu voltage to %d\n",
@@ -151,19 +131,14 @@ post_notify:
}
out:
-
cpufreq_cpu_put(policy);
return ret;
}
-static int exynos_target(struct cpufreq_policy *policy,
- unsigned int target_freq,
- unsigned int relation)
+static int exynos_target(struct cpufreq_policy *policy, unsigned int index)
{
struct cpufreq_frequency_table *freq_table = exynos_info->freq_table;
- unsigned int index;
- unsigned int new_freq;
int ret = 0;
mutex_lock(&cpufreq_lock);
@@ -171,15 +146,7 @@ static int exynos_target(struct cpufreq_policy *policy,
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);
+ ret = exynos_cpufreq_scale(freq_table[index].frequency);
out:
mutex_unlock(&cpufreq_lock);
@@ -247,38 +214,18 @@ static struct notifier_block exynos_cpufreq_nb = {
static int exynos_cpufreq_cpu_init(struct cpufreq_policy *policy)
{
- policy->cur = policy->min = policy->max = exynos_getspeed(policy->cpu);
-
- cpufreq_frequency_table_get_attr(exynos_info->freq_table, policy->cpu);
-
- /* set the transition latency value */
- policy->cpuinfo.transition_latency = 100000;
-
- cpumask_setall(policy->cpus);
-
- 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;
+ return cpufreq_generic_init(policy, exynos_info->freq_table, 100000);
}
-static struct freq_attr *exynos_cpufreq_attr[] = {
- &cpufreq_freq_attr_scaling_available_freqs,
- NULL,
-};
-
static struct cpufreq_driver exynos_driver = {
.flags = CPUFREQ_STICKY,
- .verify = exynos_verify_speed,
- .target = exynos_target,
+ .verify = cpufreq_generic_frequency_table_verify,
+ .target_index = exynos_target,
.get = exynos_getspeed,
.init = exynos_cpufreq_cpu_init,
- .exit = exynos_cpufreq_cpu_exit,
+ .exit = cpufreq_generic_exit,
.name = "exynos_cpufreq",
- .attr = exynos_cpufreq_attr,
+ .attr = cpufreq_generic_attr,
#ifdef CONFIG_PM
.suspend = exynos_cpufreq_suspend,
.resume = exynos_cpufreq_resume,