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-rw-r--r--drivers/base/power/domain.c57
-rw-r--r--include/linux/pm_domain.h16
-rw-r--r--kernel/power/Kconfig4
3 files changed, 71 insertions, 6 deletions
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 55c39f5..515c8ec 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -697,6 +697,24 @@ static inline void genpd_power_off_work_fn(struct work_struct *work) {}
#ifdef CONFIG_PM_SLEEP
+/**
+ * pm_genpd_present - Check if the given PM domain has been initialized.
+ * @genpd: PM domain to check.
+ */
+static bool pm_genpd_present(struct generic_pm_domain *genpd)
+{
+ struct generic_pm_domain *gpd;
+
+ if (IS_ERR_OR_NULL(genpd))
+ return false;
+
+ list_for_each_entry(gpd, &gpd_list, gpd_list_node)
+ if (gpd == genpd)
+ return true;
+
+ return false;
+}
+
static bool genpd_dev_active_wakeup(struct generic_pm_domain *genpd,
struct device *dev)
{
@@ -750,9 +768,10 @@ static int genpd_thaw_dev(struct generic_pm_domain *genpd, struct device *dev)
* Check if the given PM domain can be powered off (during system suspend or
* hibernation) and do that if so. Also, in that case propagate to its masters.
*
- * This function is only called in "noirq" stages of system power transitions,
- * so it need not acquire locks (all of the "noirq" callbacks are executed
- * sequentially, so it is guaranteed that it will never run twice in parallel).
+ * This function is only called in "noirq" and "syscore" stages of system power
+ * transitions, so it need not acquire locks (all of the "noirq" callbacks are
+ * executed sequentially, so it is guaranteed that it will never run twice in
+ * parallel).
*/
static void pm_genpd_sync_poweroff(struct generic_pm_domain *genpd)
{
@@ -780,9 +799,10 @@ static void pm_genpd_sync_poweroff(struct generic_pm_domain *genpd)
* pm_genpd_sync_poweron - Synchronously power on a PM domain and its masters.
* @genpd: PM domain to power on.
*
- * This function is only called in "noirq" stage of system power transitions, so
- * it need not acquire locks (all of the "noirq" callbacks are executed
- * sequentially, so it is guaranteed that it will never run twice in parallel).
+ * This function is only called in "noirq" and "syscore" stages of system power
+ * transitions, so it need not acquire locks (all of the "noirq" callbacks are
+ * executed sequentially, so it is guaranteed that it will never run twice in
+ * parallel).
*/
static void pm_genpd_sync_poweron(struct generic_pm_domain *genpd)
{
@@ -1272,6 +1292,31 @@ static void pm_genpd_complete(struct device *dev)
}
}
+/**
+ * pm_genpd_syscore_switch - Switch power during system core suspend or resume.
+ * @dev: Device that normally is marked as "always on" to switch power for.
+ *
+ * This routine may only be called during the system core (syscore) suspend or
+ * resume phase for devices whose "always on" flags are set.
+ */
+void pm_genpd_syscore_switch(struct device *dev, bool suspend)
+{
+ struct generic_pm_domain *genpd;
+
+ genpd = dev_to_genpd(dev);
+ if (!pm_genpd_present(genpd))
+ return;
+
+ if (suspend) {
+ genpd->suspended_count++;
+ pm_genpd_sync_poweroff(genpd);
+ } else {
+ pm_genpd_sync_poweron(genpd);
+ genpd->suspended_count--;
+ }
+}
+EXPORT_SYMBOL_GPL(pm_genpd_syscore_switch);
+
#else
#define pm_genpd_prepare NULL
diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h
index a7d6172..ab83cf3 100644
--- a/include/linux/pm_domain.h
+++ b/include/linux/pm_domain.h
@@ -258,4 +258,20 @@ static inline void genpd_queue_power_off_work(struct generic_pm_domain *gpd) {}
static inline void pm_genpd_poweroff_unused(void) {}
#endif
+#ifdef CONFIG_PM_GENERIC_DOMAINS_SLEEP
+extern void pm_genpd_syscore_switch(struct device *dev, bool suspend);
+#else
+static inline void pm_genpd_syscore_switch(struct device *dev, bool suspend) {}
+#endif
+
+static inline void pm_genpd_syscore_poweroff(struct device *dev)
+{
+ pm_genpd_syscore_switch(dev, true);
+}
+
+static inline void pm_genpd_syscore_poweron(struct device *dev)
+{
+ pm_genpd_syscore_switch(dev, false);
+}
+
#endif /* _LINUX_PM_DOMAIN_H */
diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig
index a70518c..5dfdc9e 100644
--- a/kernel/power/Kconfig
+++ b/kernel/power/Kconfig
@@ -263,6 +263,10 @@ config PM_GENERIC_DOMAINS
bool
depends on PM
+config PM_GENERIC_DOMAINS_SLEEP
+ def_bool y
+ depends on PM_SLEEP && PM_GENERIC_DOMAINS
+
config PM_GENERIC_DOMAINS_RUNTIME
def_bool y
depends on PM_RUNTIME && PM_GENERIC_DOMAINS
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