[PATCH 1/2] reset: add __reset_control_get()

[Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>]

reset_control_get_optional() is implemented as a static inline function
which calls reset_control_get() first and then handles the _optional
part.

Change this to implement a __reset_control_get() taking a bool optional
argument. This is done as a preparation to implement
__reset_control_bulk_get() in the next step which can reuse
__reset_control_get().

Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
---
 drivers/reset/core.c  | 11 ++++++++---
 include/linux/reset.h | 13 +++++++++----
 2 files changed, 17 insertions(+), 7 deletions(-)

diff --git a/drivers/reset/core.c b/drivers/reset/core.c
index 94bfad2067..679deee3c1 100644
--- a/drivers/reset/core.c
+++ b/drivers/reset/core.c
@@ -359,7 +359,7 @@ gpio_reset_control_get(struct device *dev, const char *id)
  *
  * Use of id names is optional.
  */
-struct reset_control *reset_control_get(struct device *dev, const char *id)
+struct reset_control *__reset_control_get(struct device *dev, const char *id, bool optional)
 {
 	struct reset_control *rstc;
 
@@ -368,7 +368,7 @@ struct reset_control *reset_control_get(struct device *dev, const char *id)
 
 	rstc = of_reset_control_get(dev->of_node, id);
 	if (IS_ERR(rstc))
-		return ERR_CAST(rstc);
+		goto err;
 
 	/*
 	 * If there is no dedicated reset controller device, check if we have
@@ -377,7 +377,7 @@ struct reset_control *reset_control_get(struct device *dev, const char *id)
 	if (!rstc) {
 		rstc = gpio_reset_control_get(dev, id);
 		if (IS_ERR(rstc))
-			return ERR_CAST(rstc);
+			goto err;
 	}
 
 	if (!rstc)
@@ -386,6 +386,11 @@ struct reset_control *reset_control_get(struct device *dev, const char *id)
 	rstc->dev = dev;
 
 	return rstc;
+err:
+	if (optional && rstc == ERR_PTR(-ENOENT))
+		return NULL;
+
+	return ERR_CAST(rstc);
 }
 EXPORT_SYMBOL_GPL(reset_control_get);
 
diff --git a/include/linux/reset.h b/include/linux/reset.h
index 7db3d3162a..183d7d55a0 100644
--- a/include/linux/reset.h
+++ b/include/linux/reset.h
@@ -13,7 +13,7 @@ int reset_control_reset(struct reset_control *rstc);
 int reset_control_assert(struct reset_control *rstc);
 int reset_control_deassert(struct reset_control *rstc);
 
-struct reset_control *reset_control_get(struct device *dev, const char *id);
+struct reset_control *__reset_control_get(struct device *dev, const char *id, bool optional);
 struct reset_control *of_reset_control_get(struct device_node *node,
 					   const char *id);
 void reset_control_put(struct reset_control *rstc);
@@ -57,7 +57,7 @@ of_reset_control_get(struct device_node *node, const char *id)
 }
 
 static inline struct reset_control *
-reset_control_get(struct device *dev, const char *id)
+__reset_control_get(struct device *dev, const char *id, bool optional)
 {
 	return NULL;
 }
@@ -96,8 +96,13 @@ static inline struct reset_control *reset_control_array_get(struct device *dev)
 static inline struct reset_control *reset_control_get_optional(struct device *dev,
 							       const char *id)
 {
-	struct reset_control *rstc = reset_control_get(dev, id);
-	return rstc == ERR_PTR(-ENOENT) ? NULL : rstc;
+	return __reset_control_get(dev, id, true);
+}
+
+static inline struct reset_control *reset_control_get(struct device *dev,
+						      const char *id)
+{
+	return __reset_control_get(dev, id, false);
 }
 
 #endif

-- 
2.39.5