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PM: domains: Enable dev_pm_genpd_suspend|resume() for suspend-to-idle

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The dev_pm_genpd_suspend|resume() have so far only been used during the
syscore suspend/resume phases. However, during suspend-to-idle, where the
syscore phases doesn't exist, similar operations are sometimes needed.

An existing example are the timekeeping_suspend|resume() functions, which
are being called both through a registered syscore ops during the syscore
phases, but also as regular functions calls from cpuidle (via
tick_freeze()) during suspend-to-idle.

For similar reasons, let's enable the dev_pm_genpd_suspend|resume() APIs to
be re-used for corresponding CPU devices that are attached to a genpd,
during suspend-to-idle.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Ulf Hansson 2020-11-03 16:06:26 +01:00 committed by Rafael J. Wysocki
parent fc51989062
commit b9795a3e4e
1 changed files with 16 additions and 4 deletions
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20
drivers/base/power/domain.c
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@ -1366,18 +1366,27 @@ static void genpd_complete(struct device *dev)
static void genpd_switch_state(struct device *dev, bool suspend)
{
struct generic_pm_domain *genpd;
bool use_lock;
genpd = dev_to_genpd_safe(dev);
if (!genpd)
return;
use_lock = genpd_is_irq_safe(genpd);
if (use_lock)
genpd_lock(genpd);
if (suspend) {
genpd->suspended_count++;
genpd_sync_power_off(genpd, false, 0);
genpd_sync_power_off(genpd, use_lock, 0);
} else {
genpd_sync_power_on(genpd, false, 0);
genpd_sync_power_on(genpd, use_lock, 0);
genpd->suspended_count--;
}
if (use_lock)
genpd_unlock(genpd);
}
/**
@ -1385,7 +1394,9 @@ static void genpd_switch_state(struct device *dev, bool suspend)
* @dev: The device that is attached to the genpd, that can be suspended.
*
* This routine should typically be called for a device that needs to be
* suspended during the syscore suspend phase.
* suspended during the syscore suspend phase. It may also be called during
* suspend-to-idle to suspend a corresponding CPU device that is attached to a
* genpd.
*/
void dev_pm_genpd_suspend(struct device *dev)
{
@ -1398,7 +1409,8 @@ EXPORT_SYMBOL_GPL(dev_pm_genpd_suspend);
* @dev: The device that is attached to the genpd, which needs to be resumed.
*
* This routine should typically be called for a device that needs to be resumed
* during the syscore resume phase.
* during the syscore resume phase. It may also be called during suspend-to-idle
* to resume a corresponding CPU device that is attached to a genpd.
*/
void dev_pm_genpd_resume(struct device *dev)
{