[PATCH v2 6/9] pmdomain: core: Export a common function for ->queue_sync_state()

[Ulf Hansson <ulf.hansson@linaro.org>]

Along with of_genpd_sync_state() that genpd provider drivers may use to
manage sync_state, let's add and export of_genpd_queue_sync_state() for
those that may need it. It's expected that the genpd provider driver
assigns it's own ->queue_sync_state() callback and invoke the new helper
from there.

Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/pmdomain/core.c   | 14 +++++++++-----
 include/linux/pm_domain.h |  2 ++
 2 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/drivers/pmdomain/core.c b/drivers/pmdomain/core.c
index f11dc2110737..49e60cb67b3e 100644
--- a/drivers/pmdomain/core.c
+++ b/drivers/pmdomain/core.c
@@ -2764,7 +2764,7 @@ static void genpd_parse_for_consumer(struct device_node *sup,
 	}
 }
 
-static void _genpd_queue_sync_state(struct device_node *np)
+static void genpd_queue_sync_state(struct device_node *np)
 {
 	struct generic_pm_domain *genpd;
 
@@ -2782,11 +2782,14 @@ static void _genpd_queue_sync_state(struct device_node *np)
 	mutex_unlock(&gpd_list_lock);
 }
 
-static void genpd_queue_sync_state(struct device *dev)
+void of_genpd_queue_sync_state(struct device *dev)
 {
 	struct device_node *np = dev->of_node;
 	struct device_link *link;
 
+	if (!np)
+		return;
+
 	if (!genpd_should_wait_for_consumer(np))
 		return;
 
@@ -2810,8 +2813,9 @@ static void genpd_queue_sync_state(struct device *dev)
 		genpd_parse_for_consumer(np, consumer->of_node);
 	}
 
-	_genpd_queue_sync_state(np);
+	genpd_queue_sync_state(np);
 }
+EXPORT_SYMBOL_GPL(of_genpd_queue_sync_state);
 
 static void genpd_sync_state(struct device *dev)
 {
@@ -2922,7 +2926,7 @@ int of_genpd_add_provider_onecell(struct device_node *np,
 		sync_state = true;
 	} else if (!dev_has_sync_state(dev)) {
 		dev_set_drv_sync_state(dev, genpd_sync_state);
-		dev_set_drv_queue_sync_state(dev, genpd_queue_sync_state);
+		dev_set_drv_queue_sync_state(dev, of_genpd_queue_sync_state);
 	}
 
 	put_device(dev);
@@ -3654,7 +3658,7 @@ static void genpd_provider_queue_sync_state(struct device *dev)
 	if (genpd->sync_state != GENPD_SYNC_STATE_ONECELL)
 		return;
 
-	genpd_queue_sync_state(dev);
+	of_genpd_queue_sync_state(dev);
 }
 
 static void genpd_provider_sync_state(struct device *dev)
diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h
index 7aa49721cde5..d428dd805c46 100644
--- a/include/linux/pm_domain.h
+++ b/include/linux/pm_domain.h
@@ -467,6 +467,7 @@ int of_genpd_remove_subdomain(const struct of_phandle_args *parent_spec,
 struct generic_pm_domain *of_genpd_remove_last(struct device_node *np);
 int of_genpd_parse_idle_states(struct device_node *dn,
 			       struct genpd_power_state **states, int *n);
+void of_genpd_queue_sync_state(struct device *dev);
 void of_genpd_sync_state(struct device_node *np);
 
 int genpd_dev_pm_attach(struct device *dev);
@@ -513,6 +514,7 @@ static inline int of_genpd_parse_idle_states(struct device_node *dn,
 	return -ENODEV;
 }
 
+static inline void of_genpd_queue_sync_state(struct device *dev) {}
 static inline void of_genpd_sync_state(struct device_node *np) {}
 
 static inline int genpd_dev_pm_attach(struct device *dev)
-- 
2.43.0