[CPUFREQ] exynos4210: Show list of available frequencies

This patch enables 'scaling_available_frequencies' attribute
showing list of available frequencies.

Signed-off-by: Donggeun Kim <dg77.kim@samsung.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: KyungMin Park <kyungmin.park@samsung.com>
Signed-off-by: Dave Jones <davej@redhat.com>

1 files changed, 22 insertions, 1 deletions

diff --git a/drivers/cpufreq/exynos4210-cpufreq.c b/drivers/cpufreq/exynos4210-cpufreq.c
index b7c3a84c4cfa..6f887573ce94 100644
--- a/drivers/cpufreq/exynos4210-cpufreq.c
+++ b/drivers/cpufreq/exynos4210-cpufreq.c
@@ -464,6 +464,8 @@ static int exynos4_cpufreq_resume(struct cpufreq_policy *policy)
 
 static int exynos4_cpufreq_cpu_init(struct cpufreq_policy *policy)
 {
+        int ret;
+
         policy->cur = policy->min = policy->max = exynos4_getspeed(policy->cpu);
 
         cpufreq_frequency_table_get_attr(exynos4_freq_table, policy->cpu);
@@ -479,16 +481,35 @@ static int exynos4_cpufreq_cpu_init(struct cpufreq_policy *policy)
          */
         cpumask_setall(policy->cpus);
 
-        return cpufreq_frequency_table_cpuinfo(policy, exynos4_freq_table);
+        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,