Messages in this thread Patch in this message | | | From | Lukasz Luba <> | Subject | [PATCH 5/6] drivers: power: suspend: call devfreq suspend/resume | Date | Wed, 21 Nov 2018 19:01:40 +0100 |
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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 draws on Tobias Jakobi's work posted ~2 years ago, who tried to solve issue with devfreq device's frequency during suspend/resume. During the discussion on LKML some corner cases and comments appeared related to the design. This patch address them keeping in mind suggestions from Chanwoo Choi.
Suggested-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de> Signed-off-by: Lukasz Luba <l.luba@partner.samsung.com> --- drivers/base/power/main.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c index a690fd4..0992e67 100644 --- 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); -- 2.7.4
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