interconnect: Add devm_of_icc_get() as exported API for users

Users can use devm version of of_icc_get() to benefit from automatic
resource release.

Signed-off-by: Akash Asthana <akashast@codeaurora.org>
Reviewed by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/1586946198-13912-2-git-send-email-akashast@codeaurora.org
Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>

diff --git a/drivers/interconnect/core.c b/drivers/interconnect/core.c
index 2c6515e..f5699ed 100644 (file)
--- a/drivers/interconnect/core.c
+++ b/drivers/interconnect/core.c
@@ -350,6 +350,31 @@ static struct icc_node *of_icc_get_from_provider(struct of_phandle_args *spec)
        return node;
 }
 
+static void devm_icc_release(struct device *dev, void *res)
+{
+       icc_put(*(struct icc_path **)res);
+}
+
+struct icc_path *devm_of_icc_get(struct device *dev, const char *name)
+{
+       struct icc_path **ptr, *path;
+
+       ptr = devres_alloc(devm_icc_release, sizeof(**ptr), GFP_KERNEL);
+       if (!ptr)
+               return ERR_PTR(-ENOMEM);
+
+       path = of_icc_get(dev, name);
+       if (!IS_ERR(path)) {
+               *ptr = path;
+               devres_add(dev, ptr);
+       } else {
+               devres_free(ptr);
+       }
+
+       return path;
+}
+EXPORT_SYMBOL_GPL(devm_of_icc_get);
+
 /**
  * of_icc_get() - get a path handle from a DT node based on name
  * @dev: device pointer for the consumer device

diff --git a/include/linux/interconnect.h b/include/linux/interconnect.h
index d70a914..7706924 100644 (file)
--- a/include/linux/interconnect.h
+++ b/include/linux/interconnect.h
@@ -28,6 +28,7 @@ struct device;
 struct icc_path *icc_get(struct device *dev, const int src_id,
                         const int dst_id);
 struct icc_path *of_icc_get(struct device *dev, const char *name);
+struct icc_path *devm_of_icc_get(struct device *dev, const char *name);
 void icc_put(struct icc_path *path);
 int icc_set_bw(struct icc_path *path, u32 avg_bw, u32 peak_bw);
 void icc_set_tag(struct icc_path *path, u32 tag);
@@ -46,6 +47,12 @@ static inline struct icc_path *of_icc_get(struct device *dev,
        return NULL;
 }
 
+static inline struct icc_path *devm_of_icc_get(struct device *dev,
+                                               const char *name)
+{
+       return NULL;
+}
+
 static inline void icc_put(struct icc_path *path)
 {
 }