iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

PM / Domains: Stop/start devices during system PM suspend/resume in genpd

Browse Source 
Not all subsystems/drivers that manages devices attached to a genpd
makes use of the pm_runtime_force_suspend|resume() helper functions
to deal with system PM suspend/resume.

In cases like these and when genpd's ->stop|start() callbacks are
used for the device, invoke the pm_runtime_force_suspend|resume()
helper functions from genpd's "noirq" system PM callbacks. In this
way we make sure to "stop" the device on suspend and to "start" it
on resume.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Ulf Hansson 2016-05-30 11:33:14 +02:00 committed by Rafael J. Wysocki
parent 4d23a5e848
commit 122a22377a
1 changed files with 27 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
drivers/base/power/domain.c
View File

@ -761,6 +761,7 @@ static int pm_genpd_prepare(struct device *dev)
static int pm_genpd_suspend_noirq(struct device *dev)
{
struct generic_pm_domain *genpd;
int ret;
dev_dbg(dev, "%s()\n", __func__);
@ -771,6 +772,12 @@ static int pm_genpd_suspend_noirq(struct device *dev)
if (dev->power.wakeup_path && genpd_dev_active_wakeup(genpd, dev))
return 0;
if (genpd->dev_ops.stop && genpd->dev_ops.start) {
ret = pm_runtime_force_suspend(dev);
if (ret)
return ret;
}
/*
* Since all of the "noirq" callbacks are executed sequentially, it is
* guaranteed that this function will never run twice in parallel for
@ -791,6 +798,7 @@ static int pm_genpd_suspend_noirq(struct device *dev)
static int pm_genpd_resume_noirq(struct device *dev)
{
struct generic_pm_domain *genpd;
int ret = 0;
dev_dbg(dev, "%s()\n", __func__);
@ -809,7 +817,10 @@ static int pm_genpd_resume_noirq(struct device *dev)
pm_genpd_sync_poweron(genpd, true);
genpd->suspended_count--;
return 0;
if (genpd->dev_ops.stop && genpd->dev_ops.start)
ret = pm_runtime_force_resume(dev);
return ret;
}
/**
@ -824,6 +835,7 @@ static int pm_genpd_resume_noirq(struct device *dev)
static int pm_genpd_freeze_noirq(struct device *dev)
{
struct generic_pm_domain *genpd;
int ret = 0;
dev_dbg(dev, "%s()\n", __func__);
@ -831,7 +843,10 @@ static int pm_genpd_freeze_noirq(struct device *dev)
if (IS_ERR(genpd))
return -EINVAL;
return 0;
if (genpd->dev_ops.stop && genpd->dev_ops.start)
ret = pm_runtime_force_suspend(dev);
return ret;
}
/**
@ -844,6 +859,7 @@ static int pm_genpd_freeze_noirq(struct device *dev)
static int pm_genpd_thaw_noirq(struct device *dev)
{
struct generic_pm_domain *genpd;
int ret = 0;
dev_dbg(dev, "%s()\n", __func__);
@ -851,7 +867,10 @@ static int pm_genpd_thaw_noirq(struct device *dev)
if (IS_ERR(genpd))
return -EINVAL;
return 0;
if (genpd->dev_ops.stop && genpd->dev_ops.start)
ret = pm_runtime_force_resume(dev);
return ret;
}
/**
@ -864,6 +883,7 @@ static int pm_genpd_thaw_noirq(struct device *dev)
static int pm_genpd_restore_noirq(struct device *dev)
{
struct generic_pm_domain *genpd;
int ret = 0;
dev_dbg(dev, "%s()\n", __func__);
@ -889,7 +909,10 @@ static int pm_genpd_restore_noirq(struct device *dev)
pm_genpd_sync_poweron(genpd, true);
return 0;
if (genpd->dev_ops.stop && genpd->dev_ops.start)
ret = pm_runtime_force_resume(dev);
return ret;
}
/**