Commit ed61e18a authored by Leonard Crestez's avatar Leonard Crestez Committed by Rafael J. Wysocki
Browse files

PM / Domains: Add GENPD_FLAG_RPM_ALWAYS_ON flag 



This is for power domains which can only be powered off for suspend but
not as part of runtime PM.

Suggested-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
Signed-off-by: default avatarLeonard Crestez <leonard.crestez@nxp.com>
Reviewed-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 8f5e823f

drivers/base/power/domain.c

+6 −2
Original line number Diff line number Diff line
@@ -130,6 +130,7 @@ static const struct genpd_lock_ops genpd_spin_ops = { 
#define genpd_is_always_on(genpd)	(genpd->flags & GENPD_FLAG_ALWAYS_ON)

#define genpd_is_active_wakeup(genpd)	(genpd->flags & GENPD_FLAG_ACTIVE_WAKEUP)

#define genpd_is_cpu_domain(genpd)	(genpd->flags & GENPD_FLAG_CPU_DOMAIN)

#define genpd_is_rpm_always_on(genpd)	(genpd->flags & GENPD_FLAG_RPM_ALWAYS_ON)



static inline bool irq_safe_dev_in_no_sleep_domain(struct device *dev,

		const struct generic_pm_domain *genpd)
@@ -517,7 +518,9 @@ static int genpd_power_off(struct generic_pm_domain *genpd, bool one_dev_on, 
	 * (1) The domain is configured as always on.

	 * (2) When the domain has a subdomain being powered on.

	 */

	if (genpd_is_always_on(genpd) || atomic_read(&genpd->sd_count) > 0)

	if (genpd_is_always_on(genpd) ||

			genpd_is_rpm_always_on(genpd) ||

			atomic_read(&genpd->sd_count) > 0)

		return -EBUSY;



	list_for_each_entry(pdd, &genpd->dev_list, list_node) {
@@ -1814,7 +1817,8 @@ int pm_genpd_init(struct generic_pm_domain *genpd, 
	}



	/* Always-on domains must be powered on at initialization. */

	if (genpd_is_always_on(genpd) && !genpd_status_on(genpd))

	if ((genpd_is_always_on(genpd) || genpd_is_rpm_always_on(genpd)) &&

			!genpd_status_on(genpd))

		return -EINVAL;



	if (genpd_is_cpu_domain(genpd) &&

include/linux/pm_domain.h

+4 −0
Original line number Diff line number Diff line
@@ -53,12 +53,16 @@ 
 *				driver must then comply with the so called,

 *				last-man-standing algorithm, for the CPUs in the

 *				PM domain.

 *

 * GENPD_FLAG_RPM_ALWAYS_ON:	Instructs genpd to always keep the PM domain

 *				powered on except for system suspend.

 */

#define GENPD_FLAG_PM_CLK	 (1U << 0)

#define GENPD_FLAG_IRQ_SAFE	 (1U << 1)

#define GENPD_FLAG_ALWAYS_ON	 (1U << 2)

#define GENPD_FLAG_ACTIVE_WAKEUP (1U << 3)

#define GENPD_FLAG_CPU_DOMAIN	 (1U << 4)

#define GENPD_FLAG_RPM_ALWAYS_ON (1U << 5)



enum gpd_status {

	GPD_STATE_ACTIVE = 0,	/* PM domain is active */

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