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authorRafał Miłecki <rafal@milecki.pl>2017-03-06 08:19:44 +0300
committerJacek Anaszewski <jacek.anaszewski@gmail.com>2017-03-08 23:10:01 +0300
commit442c609830e98919faa78b797e9b89c53bab9cbf (patch)
tree80c777f7864a0477d5fd64b4fc24b71f776c0a52
parentab768386116d0d88b944d0ef958adff082c088a8 (diff)
downloadlinux-442c609830e98919faa78b797e9b89c53bab9cbf.tar.xz
leds: core: add OF variants of LED registering functions
These new functions allow passing an additional device_node argument that will be internally set for created LED device. Thanks to this LED core code and triggers will be able to access DT node for reading extra info. The easiest solution for achieving this was reworking old functions to more generic ones & adding simple defines for API compatibility. Signed-off-by: Rafał Miłecki <rafal@milecki.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
-rw-r--r--drivers/leds/led-class.c26
-rw-r--r--include/linux/leds.h14
2 files changed, 26 insertions, 14 deletions
diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c
index f2b0a80a62b4..b0e2d55acbd6 100644
--- a/drivers/leds/led-class.c
+++ b/drivers/leds/led-class.c
@@ -244,11 +244,14 @@ static int led_classdev_next_name(const char *init_name, char *name,
}
/**
- * led_classdev_register - register a new object of led_classdev class.
- * @parent: The device to register.
+ * of_led_classdev_register - register a new object of led_classdev class.
+ *
+ * @parent: parent of LED device
* @led_cdev: the led_classdev structure for this device.
+ * @np: DT node describing this LED
*/
-int led_classdev_register(struct device *parent, struct led_classdev *led_cdev)
+int of_led_classdev_register(struct device *parent, struct device_node *np,
+ struct led_classdev *led_cdev)
{
char name[LED_MAX_NAME_SIZE];
int ret;
@@ -261,6 +264,7 @@ int led_classdev_register(struct device *parent, struct led_classdev *led_cdev)
led_cdev, led_cdev->groups, "%s", name);
if (IS_ERR(led_cdev->dev))
return PTR_ERR(led_cdev->dev);
+ led_cdev->dev->of_node = np;
if (ret)
dev_warn(parent, "Led %s renamed to %s due to name collision",
@@ -303,7 +307,7 @@ int led_classdev_register(struct device *parent, struct led_classdev *led_cdev)
return 0;
}
-EXPORT_SYMBOL_GPL(led_classdev_register);
+EXPORT_SYMBOL_GPL(of_led_classdev_register);
/**
* led_classdev_unregister - unregisters a object of led_properties class.
@@ -348,12 +352,14 @@ static void devm_led_classdev_release(struct device *dev, void *res)
}
/**
- * devm_led_classdev_register - resource managed led_classdev_register()
- * @parent: The device to register.
+ * devm_of_led_classdev_register - resource managed led_classdev_register()
+ *
+ * @parent: parent of LED device
* @led_cdev: the led_classdev structure for this device.
*/
-int devm_led_classdev_register(struct device *parent,
- struct led_classdev *led_cdev)
+int devm_of_led_classdev_register(struct device *parent,
+ struct device_node *np,
+ struct led_classdev *led_cdev)
{
struct led_classdev **dr;
int rc;
@@ -362,7 +368,7 @@ int devm_led_classdev_register(struct device *parent,
if (!dr)
return -ENOMEM;
- rc = led_classdev_register(parent, led_cdev);
+ rc = of_led_classdev_register(parent, np, led_cdev);
if (rc) {
devres_free(dr);
return rc;
@@ -373,7 +379,7 @@ int devm_led_classdev_register(struct device *parent,
return 0;
}
-EXPORT_SYMBOL_GPL(devm_led_classdev_register);
+EXPORT_SYMBOL_GPL(devm_of_led_classdev_register);
static int devm_led_classdev_match(struct device *dev, void *res, void *data)
{
diff --git a/include/linux/leds.h b/include/linux/leds.h
index 38c0bd7ca107..64c56d454f7d 100644
--- a/include/linux/leds.h
+++ b/include/linux/leds.h
@@ -122,10 +122,16 @@ struct led_classdev {
struct mutex led_access;
};
-extern int led_classdev_register(struct device *parent,
- struct led_classdev *led_cdev);
-extern int devm_led_classdev_register(struct device *parent,
- struct led_classdev *led_cdev);
+extern int of_led_classdev_register(struct device *parent,
+ struct device_node *np,
+ struct led_classdev *led_cdev);
+#define led_classdev_register(parent, led_cdev) \
+ of_led_classdev_register(parent, NULL, led_cdev)
+extern int devm_of_led_classdev_register(struct device *parent,
+ struct device_node *np,
+ struct led_classdev *led_cdev);
+#define devm_led_classdev_register(parent, led_cdev) \
+ devm_of_led_classdev_register(parent, NULL, led_cdev)
extern void led_classdev_unregister(struct led_classdev *led_cdev);
extern void devm_led_classdev_unregister(struct device *parent,
struct led_classdev *led_cdev);