Commit b9795a3e authored by Ulf Hansson's avatar Ulf Hansson Committed by Rafael J. Wysocki
Browse files

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



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: default avatarUlf Hansson <ulf.hansson@linaro.org>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent fc519890

drivers/base/power/domain.c

+16 −4
Original line number Diff line number Diff line
@@ -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)

{

CRA Git | Maintained and supported by SUSTech CRA and CCSE