PM: sleep: call devfreq suspend/resume

Devfreq framework supports suspend of its devices.
Call the the devfreq interface and allow devfreq devices
preserve/restore their states during suspend/resume.

Suggested-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Lukasz Luba <l.luba@partner.samsung.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index a690fd4..0992e67 100644 (file)
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -32,6 +32,7 @@
 #include <trace/events/power.h>
 #include <linux/cpufreq.h>
 #include <linux/cpuidle.h>
+#include <linux/devfreq.h>
 #include <linux/timer.h>
 
 #include "../base.h"
@@ -1078,6 +1079,7 @@ void dpm_resume(pm_message_t state)
        dpm_show_time(starttime, state, 0, NULL);
 
        cpufreq_resume();
+       devfreq_resume();
        trace_suspend_resume(TPS("dpm_resume"), state.event, false);
 }
 
@@ -1852,6 +1854,7 @@ int dpm_suspend(pm_message_t state)
        trace_suspend_resume(TPS("dpm_suspend"), state.event, true);
        might_sleep();
 
+       devfreq_suspend();
        cpufreq_suspend();
 
        mutex_lock(&dpm_list_mtx);