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| author | Ulf Hansson <ulf.hansson@linaro.org> | 2016-05-30 11:33:14 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-06-16 15:14:37 +0200 |
| commit | 122a22377a3d8cc11cf18b20db13b02d5aad1a38 (patch) | |
| tree | f74a8e04b0fc737ca7c556994bbd270afc2f4902 /drivers/base | |
| parent | 4d23a5e84806b202d9231929c9507ef7cf7a0185 (diff) | |
| download | linux-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.c | 31 |
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; } /** |