[PATCH 3/6] led: introduce led_bind_generic()

[Rasmus Villemoes]

All existing drivers in drivers/led/ contain a .bind method that does
exactly the same thing, with just the actual driver name
differing. Create a helper so all those individual methods can be
changed to one-liners.

Signed-off-by: Rasmus Villemoes <rasmus.villemoes at prevas.dk>
---
 drivers/led/led-uclass.c | 18 ++++++++++++++++++
 include/led.h            |  8 ++++++++
 2 files changed, 26 insertions(+)

diff --git a/drivers/led/led-uclass.c b/drivers/led/led-uclass.c
index 0232fa84de..a4be56fc25 100644
--- a/drivers/led/led-uclass.c
+++ b/drivers/led/led-uclass.c
@@ -11,9 +11,27 @@
 #include <errno.h>
 #include <led.h>
 #include <dm/device-internal.h>
+#include <dm/lists.h>
 #include <dm/root.h>
 #include <dm/uclass-internal.h>
 
+int led_bind_generic(struct udevice *parent, const char *driver_name)
+{
+	struct udevice *dev;
+	ofnode node;
+	int ret;
+
+	dev_for_each_subnode(node, parent) {
+		ret = device_bind_driver_to_node(parent, driver_name,
+						 ofnode_get_name(node),
+						 node, &dev);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
 int led_get_by_label(const char *label, struct udevice **devp)
 {
 	struct udevice *dev;
diff --git a/include/led.h b/include/led.h
index 329041008c..a635316628 100644
--- a/include/led.h
+++ b/include/led.h
@@ -110,4 +110,12 @@ enum led_state_t led_get_state(struct udevice *dev);
  */
 int led_set_period(struct udevice *dev, int period_ms);
 
+/**
+ * led_bind_generic() - bind children of parent to given driver
+ *
+ * @parent:      Top-level LED device
+ * @driver_name: Driver for handling individual child nodes
+ */
+int led_bind_generic(struct udevice *parent, const char *driver_name);
+
 #endif
-- 
2.40.1.1.g1c60b9335d