PM: domains: Rename pm_genpd_syscore_poweroff|poweron()

To better describe what the pm_genpd_syscore_poweroff|poweron() functions
actually do, let's rename them to dev_pm_genpd_suspend|resume() and update
the rather few callers of them accordingly (a couple of clocksource
drivers).

Moreover, let's take the opportunity to add some documentation of these
exported functions, as that is currently missing.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/base/power/domain.c

@@ -1363,14 +1363,7 @@ static void genpd_complete(struct device *dev)
 	genpd_unlock(genpd);
 }
 
-/**
- * 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.
- */
-static void genpd_syscore_switch(struct device *dev, bool suspend)
+static void genpd_switch_state(struct device *dev, bool suspend)
 {
 	struct generic_pm_domain *genpd;
 
@@ -1387,17 +1380,31 @@ static void genpd_syscore_switch(struct device *dev, bool suspend)
 	}
 }
 
-void pm_genpd_syscore_poweroff(struct device *dev)
+/**
+ * dev_pm_genpd_suspend - Synchronously try to suspend the genpd for @dev
+ * @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.
+ */
+void dev_pm_genpd_suspend(struct device *dev)
 {
-	genpd_syscore_switch(dev, true);
+	genpd_switch_state(dev, true);
 }
-EXPORT_SYMBOL_GPL(pm_genpd_syscore_poweroff);
+EXPORT_SYMBOL_GPL(dev_pm_genpd_suspend);
 
-void pm_genpd_syscore_poweron(struct device *dev)
+/**
+ * dev_pm_genpd_resume - Synchronously try to resume the genpd for @dev
+ * @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.
+ */
+void dev_pm_genpd_resume(struct device *dev)
 {
-	genpd_syscore_switch(dev, false);
+	genpd_switch_state(dev, false);
 }
-EXPORT_SYMBOL_GPL(pm_genpd_syscore_poweron);
+EXPORT_SYMBOL_GPL(dev_pm_genpd_resume);
 
 #else /* !CONFIG_PM_SLEEP */
 

drivers/clocksource/sh_cmt.c

@@ -658,7 +658,7 @@ static void sh_cmt_clocksource_suspend(struct clocksource *cs)
 		return;
 
 	sh_cmt_stop(ch, FLAG_CLOCKSOURCE);
-	pm_genpd_syscore_poweroff(&ch->cmt->pdev->dev);
+	dev_pm_genpd_suspend(&ch->cmt->pdev->dev);
 }
 
 static void sh_cmt_clocksource_resume(struct clocksource *cs)
@@ -668,7 +668,7 @@ static void sh_cmt_clocksource_resume(struct clocksource *cs)
 	if (!ch->cs_enabled)
 		return;
 
-	pm_genpd_syscore_poweron(&ch->cmt->pdev->dev);
+	dev_pm_genpd_resume(&ch->cmt->pdev->dev);
 	sh_cmt_start(ch, FLAG_CLOCKSOURCE);
 }
 
@@ -760,7 +760,7 @@ static void sh_cmt_clock_event_suspend(struct clock_event_device *ced)
 {
 	struct sh_cmt_channel *ch = ced_to_sh_cmt(ced);
 
-	pm_genpd_syscore_poweroff(&ch->cmt->pdev->dev);
+	dev_pm_genpd_suspend(&ch->cmt->pdev->dev);
 	clk_unprepare(ch->cmt->clk);
 }
 
@@ -769,7 +769,7 @@ static void sh_cmt_clock_event_resume(struct clock_event_device *ced)
 	struct sh_cmt_channel *ch = ced_to_sh_cmt(ced);
 
 	clk_prepare(ch->cmt->clk);
-	pm_genpd_syscore_poweron(&ch->cmt->pdev->dev);
+	dev_pm_genpd_resume(&ch->cmt->pdev->dev);
 }
 
 static int sh_cmt_register_clockevent(struct sh_cmt_channel *ch,

drivers/clocksource/sh_mtu2.c

@@ -297,12 +297,12 @@ static int sh_mtu2_clock_event_set_periodic(struct clock_event_device *ced)
 
 static void sh_mtu2_clock_event_suspend(struct clock_event_device *ced)
 {
-	pm_genpd_syscore_poweroff(&ced_to_sh_mtu2(ced)->mtu->pdev->dev);
+	dev_pm_genpd_suspend(&ced_to_sh_mtu2(ced)->mtu->pdev->dev);
 }
 
 static void sh_mtu2_clock_event_resume(struct clock_event_device *ced)
 {
-	pm_genpd_syscore_poweron(&ced_to_sh_mtu2(ced)->mtu->pdev->dev);
+	dev_pm_genpd_resume(&ced_to_sh_mtu2(ced)->mtu->pdev->dev);
 }
 
 static void sh_mtu2_register_clockevent(struct sh_mtu2_channel *ch,

drivers/clocksource/sh_tmu.c

@@ -292,7 +292,7 @@ static void sh_tmu_clocksource_suspend(struct clocksource *cs)
 
 	if (--ch->enable_count == 0) {
 		__sh_tmu_disable(ch);
-		pm_genpd_syscore_poweroff(&ch->tmu->pdev->dev);
+		dev_pm_genpd_suspend(&ch->tmu->pdev->dev);
 	}
 }
 
@@ -304,7 +304,7 @@ static void sh_tmu_clocksource_resume(struct clocksource *cs)
 		return;
 
 	if (ch->enable_count++ == 0) {
-		pm_genpd_syscore_poweron(&ch->tmu->pdev->dev);
+		dev_pm_genpd_resume(&ch->tmu->pdev->dev);
 		__sh_tmu_enable(ch);
 	}
 }
@@ -394,12 +394,12 @@ static int sh_tmu_clock_event_next(unsigned long delta,
 
 static void sh_tmu_clock_event_suspend(struct clock_event_device *ced)
 {
-	pm_genpd_syscore_poweroff(&ced_to_sh_tmu(ced)->tmu->pdev->dev);
+	dev_pm_genpd_suspend(&ced_to_sh_tmu(ced)->tmu->pdev->dev);
 }
 
 static void sh_tmu_clock_event_resume(struct clock_event_device *ced)
 {
-	pm_genpd_syscore_poweron(&ced_to_sh_tmu(ced)->tmu->pdev->dev);
+	dev_pm_genpd_resume(&ced_to_sh_tmu(ced)->tmu->pdev->dev);
 }
 
 static void sh_tmu_register_clockevent(struct sh_tmu_channel *ch,

include/linux/pm_domain.h

@@ -280,11 +280,11 @@ static inline int dev_pm_genpd_remove_notifier(struct device *dev)
 #endif
 
 #ifdef CONFIG_PM_GENERIC_DOMAINS_SLEEP
-void pm_genpd_syscore_poweroff(struct device *dev);
-void pm_genpd_syscore_poweron(struct device *dev);
+void dev_pm_genpd_suspend(struct device *dev);
+void dev_pm_genpd_resume(struct device *dev);
 #else
-static inline void pm_genpd_syscore_poweroff(struct device *dev) {}
-static inline void pm_genpd_syscore_poweron(struct device *dev) {}
+static inline void dev_pm_genpd_suspend(struct device *dev) {}
+static inline void dev_pm_genpd_resume(struct device *dev) {}
 #endif
 
 /* OF PM domain providers */