cpufreq: introduce cpufreq_generic_get() routine

CPUFreq drivers that use clock frameworks interface,i.e. clk_get_rate(),
to get CPUs clk rate, have similar sort of code used in most of them.

This patch adds a generic ->get() which will do the same thing for them.
All those drivers are required to now is to set .get to cpufreq_generic_get()
and set their clk pointer in policy->clk during ->init().

Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 3 insertions, 7 deletions

diff --git a/drivers/cpufreq/exynos-cpufreq.c b/drivers/cpufreq/exynos-cpufreq.c
index f7c322c7d7ed..4ee3804637be 100644
--- a/drivers/cpufreq/exynos-cpufreq.c
+++ b/drivers/cpufreq/exynos-cpufreq.c
@@ -31,11 +31,6 @@ static unsigned int locking_frequency;
 static bool frequency_locked;
 static DEFINE_MUTEX(cpufreq_lock);
 
-static unsigned int exynos_getspeed(unsigned int cpu)
-{
-        return clk_get_rate(exynos_info->cpu_clk) / 1000;
-}
-
 static int exynos_cpufreq_get_index(unsigned int freq)
 {
         struct cpufreq_frequency_table *freq_table = exynos_info->freq_table;
@@ -215,6 +210,7 @@ static struct notifier_block exynos_cpufreq_nb = {
 
 static int exynos_cpufreq_cpu_init(struct cpufreq_policy *policy)
 {
+        policy->clk = exynos_info->cpu_clk;
         return cpufreq_generic_init(policy, exynos_info->freq_table, 100000);
 }
 
@@ -222,7 +218,7 @@ static struct cpufreq_driver exynos_driver = {
         .flags          = CPUFREQ_STICKY | CPUFREQ_NEED_INITIAL_FREQ_CHECK,
         .verify         = cpufreq_generic_frequency_table_verify,
         .target_index   = exynos_target,
-        .get            = exynos_getspeed,
+        .get            = cpufreq_generic_get,
         .init           = exynos_cpufreq_cpu_init,
         .exit           = cpufreq_generic_exit,
         .name           = "exynos_cpufreq",
@@ -264,7 +260,7 @@ static int exynos_cpufreq_probe(struct platform_device *pdev)
                 goto err_vdd_arm;
         }
 
-        locking_frequency = exynos_getspeed(0);
+        locking_frequency = clk_get_rate(exynos_info->cpu_clk) / 1000;
 
         register_pm_notifier(&exynos_cpufreq_nb);