From: Lukasz Luba <l.luba@partner.samsung.com>
Date: Fri, 16 Nov 2018 12:36:53 +0000 (+0100)
Subject: drivers: power: suspend: call devfreq suspend/resume
X-Git-Tag: submit/tizen/20190329.020226~202
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=99619b3d8b965dc25c455591f42d80090d0d44e5;p=platform%2Fkernel%2Flinux-exynos.git

drivers: power: suspend: 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.

The patch is based on earlier work by Tobias Jakobi.

Change-Id: I1aa62a13466120ef6f88edec2637888d77edc981
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>
---

diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index d16b40cd26cc..fb570d4abe82 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -33,6 +33,7 @@
 #include <trace/events/power.h>
 #include <linux/cpufreq.h>
 #include <linux/cpuidle.h>
+#include <linux/devfreq.h>
 #include <linux/timer.h>
 
 #include "../base.h"
@@ -958,6 +959,7 @@ 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);
 }
 
@@ -1613,6 +1615,7 @@ 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);