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authorUlf Hansson <ulf.hansson@linaro.org>2016-05-30 11:33:14 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2016-06-16 15:14:37 +0200
commit122a22377a3d8cc11cf18b20db13b02d5aad1a38 (patch)
treef74a8e04b0fc737ca7c556994bbd270afc2f4902 /drivers/base
parent4d23a5e84806b202d9231929c9507ef7cf7a0185 (diff)
downloadlinux-122a22377a3d8cc11cf18b20db13b02d5aad1a38.tar.bz2
PM / Domains: Stop/start devices during system PM suspend/resume in genpd
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>
Diffstat (limited to 'drivers/base')
-rw-r--r--drivers/base/power/domain.c31
1 files changed, 27 insertions, 4 deletions
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 4cb57f3f0ee3..9193aacf7b1b 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -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;
}
/**