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, 5 insertions, 10 deletions

diff --git a/drivers/cpufreq/loongson2_cpufreq.c b/drivers/cpufreq/loongson2_cpufreq.c
index a43609218105..b6581abc9207 100644
--- a/drivers/cpufreq/loongson2_cpufreq.c
+++ b/drivers/cpufreq/loongson2_cpufreq.c
@@ -24,8 +24,6 @@
 
 static uint nowait;
 
-static struct clk *cpuclk;
-
 static void (*saved_cpu_wait) (void);
 
 static int loongson2_cpu_freq_notifier(struct notifier_block *nb,
@@ -44,11 +42,6 @@ static int loongson2_cpu_freq_notifier(struct notifier_block *nb,
 	return 0;
 }
 
-static unsigned int loongson2_cpufreq_get(unsigned int cpu)
-{
-	return clk_get_rate(cpuclk);
-}
-
 /*
  * Here we notify other drivers of the proposed change and the final change.
  */
@@ -69,13 +62,14 @@ static int loongson2_cpufreq_target(struct cpufreq_policy *policy,
 	set_cpus_allowed_ptr(current, &cpus_allowed);
 
 	/* setting the cpu frequency */
-	clk_set_rate(cpuclk, freq);
+	clk_set_rate(policy->clk, freq);
 
 	return 0;
 }
 
 static int loongson2_cpufreq_cpu_init(struct cpufreq_policy *policy)
 {
+	static struct clk *cpuclk;
 	int i;
 	unsigned long rate;
 	int ret;
@@ -104,13 +98,14 @@ static int loongson2_cpufreq_cpu_init(struct cpufreq_policy *policy)
 		return ret;
 	}
 
+	policy->clk = cpuclk;
 	return cpufreq_generic_init(policy, &loongson2_clockmod_table[0], 0);
 }
 
 static int loongson2_cpufreq_exit(struct cpufreq_policy *policy)
 {
 	cpufreq_frequency_table_put_attr(policy->cpu);
-	clk_put(cpuclk);
+	clk_put(policy->clk);
 	return 0;
 }
 
@@ -119,7 +114,7 @@ static struct cpufreq_driver loongson2_cpufreq_driver = {
 	.init = loongson2_cpufreq_cpu_init,
 	.verify = cpufreq_generic_frequency_table_verify,
 	.target_index = loongson2_cpufreq_target,
-	.get = loongson2_cpufreq_get,
+	.get = cpufreq_generic_get,
 	.exit = loongson2_cpufreq_exit,
 	.attr = cpufreq_generic_attr,
 };