cpufreq: s5pv210: Use cpufreq_generic_suspend()

The cpufreq core now supports suspending and resuming of cpufreq
drivers and governors during systems suspend and resume, so use
the common infrastructure instead of defining special PM notifiers
for the same thing.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
[rjw: Changelog]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/cpufreq/s5pv210-cpufreq.c

@@ -18,7 +18,6 @@
 #include <linux/cpufreq.h>
 #include <linux/reboot.h>
 #include <linux/regulator/consumer.h>
-#include <linux/suspend.h>
 
 #include <mach/map.h>
 #include <mach/regs-clock.h>
@@ -435,18 +434,6 @@ static int s5pv210_target(struct cpufreq_policy *policy, unsigned int index)
 	return ret;
 }
 
-#ifdef CONFIG_PM
-static int s5pv210_cpufreq_suspend(struct cpufreq_policy *policy)
-{
-	return 0;
-}
-
-static int s5pv210_cpufreq_resume(struct cpufreq_policy *policy)
-{
-	return 0;
-}
-#endif
-
 static int check_mem_type(void __iomem *dmc_reg)
 {
 	unsigned long val;
@@ -502,6 +489,7 @@ static int __init s5pv210_cpu_init(struct cpufreq_policy *policy)
 	s5pv210_dram_conf[1].refresh = (__raw_readl(S5P_VA_DMC1 + 0x30) * 1000);
 	s5pv210_dram_conf[1].freq = clk_get_rate(dmc1_clk);
 
+	policy->suspend_freq = SLEEP_FREQ;
 	return cpufreq_generic_init(policy, s5pv210_freq_table, 40000);
 
 out_dmc1:
@@ -511,32 +499,6 @@ static int __init s5pv210_cpu_init(struct cpufreq_policy *policy)
 	return ret;
 }
 
-static int s5pv210_cpufreq_notifier_event(struct notifier_block *this,
-					  unsigned long event, void *ptr)
-{
-	int ret;
-
-	switch (event) {
-	case PM_SUSPEND_PREPARE:
-		ret = cpufreq_driver_target(cpufreq_cpu_get(0), SLEEP_FREQ, 0);
-		if (ret < 0)
-			return NOTIFY_BAD;
-
-		/* Disable updation of cpu frequency */
-		no_cpufreq_access = true;
-		return NOTIFY_OK;
-	case PM_POST_RESTORE:
-	case PM_POST_SUSPEND:
-		/* Enable updation of cpu frequency */
-		no_cpufreq_access = false;
-		cpufreq_driver_target(cpufreq_cpu_get(0), SLEEP_FREQ, 0);
-
-		return NOTIFY_OK;
-	}
-
-	return NOTIFY_DONE;
-}
-
 static int s5pv210_cpufreq_reboot_notifier_event(struct notifier_block *this,
 						 unsigned long event, void *ptr)
 {
@@ -558,15 +520,11 @@ static struct cpufreq_driver s5pv210_driver = {
 	.init		= s5pv210_cpu_init,
 	.name		= "s5pv210",
 #ifdef CONFIG_PM
-	.suspend	= s5pv210_cpufreq_suspend,
-	.resume		= s5pv210_cpufreq_resume,
+	.suspend	= cpufreq_generic_suspend,
+	.resume		= cpufreq_generic_suspend, /* We need to set SLEEP FREQ again */
 #endif
 };
 
-static struct notifier_block s5pv210_cpufreq_notifier = {
-	.notifier_call = s5pv210_cpufreq_notifier_event,
-};
-
 static struct notifier_block s5pv210_cpufreq_reboot_notifier = {
 	.notifier_call = s5pv210_cpufreq_reboot_notifier_event,
 };
@@ -586,7 +544,6 @@ static int __init s5pv210_cpufreq_init(void)
 		return PTR_ERR(int_regulator);
 	}
 
-	register_pm_notifier(&s5pv210_cpufreq_notifier);
 	register_reboot_notifier(&s5pv210_cpufreq_reboot_notifier);
 
 	return cpufreq_register_driver(&s5pv210_driver);