@@ -1168,6 +1168,11 @@ static void pm_genpd_complete(struct device *dev)
genpd_unlock(genpd);
}
+static bool pm_genpd_active_wakeup_true(struct device *dev)
+{
+ return true;
+}
+
/**
* genpd_syscore_switch - Switch power during system core suspend or resume.
* @dev: Device that normally is marked as "always on" to switch power for.
@@ -1214,6 +1219,7 @@ EXPORT_SYMBOL_GPL(pm_genpd_syscore_poweron);
#define pm_genpd_poweroff_noirq NULL
#define pm_genpd_restore_noirq NULL
#define pm_genpd_complete NULL
+#define pm_genpd_active_wakeup_true NULL
#endif /* CONFIG_PM_SLEEP */
@@ -1587,6 +1593,8 @@ int pm_genpd_init(struct generic_pm_domain *genpd,
genpd->dev_ops.stop = pm_clk_suspend;
genpd->dev_ops.start = pm_clk_resume;
}
+ if (genpd->flags & GENPD_FLAG_ACTIVE_WAKEUP)
+ genpd->dev_ops.active_wakeup = pm_genpd_active_wakeup_true;
/* Always-on domains must be powered on at initialization. */
if (genpd_is_always_on(genpd) && !genpd_status_on(genpd))
@@ -18,9 +18,10 @@
#include <linux/spinlock.h>
/* Defines used for the flags field in the struct generic_pm_domain */
-#define GENPD_FLAG_PM_CLK (1U << 0) /* PM domain uses PM clk */
-#define GENPD_FLAG_IRQ_SAFE (1U << 1) /* PM domain operates in atomic */
-#define GENPD_FLAG_ALWAYS_ON (1U << 2) /* PM domain is always powered on */
+#define GENPD_FLAG_PM_CLK (1U << 0) /* PM domain uses PM clk */
+#define GENPD_FLAG_IRQ_SAFE (1U << 1) /* PM domain operates in atomic */
+#define GENPD_FLAG_ALWAYS_ON (1U << 2) /* PM domain is always powered on */
+#define GENPD_FLAG_ACTIVE_WAKEUP (1U << 3) /* Keep devices active if wakeup */
enum gpd_status {
GPD_STATE_ACTIVE = 0, /* PM domain is active */
It is quite common for PM Domains to require slave devices to be kept active during system suspend if they are to be used as wakeup sources. To enable this, currently each PM Domain or driver has to provide its own gpd_dev_ops.active_wakeup() callback. Introduce a new flag GENPD_FLAG_ACTIVE_WAKEUP to consolidate this. If specified, a default callback that always returns true will be installed in gpd_dev_ops.active_wakeup(). PM Domains that need more fine-grained controls can still provide their own callbacks, as before. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> --- drivers/base/power/domain.c | 8 ++++++++ include/linux/pm_domain.h | 7 ++++--- 2 files changed, 12 insertions(+), 3 deletions(-)