kernel: fix of_node handling in LEDs core code

This backports fixes for setting of_node and making it possible to read
extra info from DT. This was partially fixed by:
[PATCH] leds: leds-gpio: Set of_node for created LED devices
but it didn't work during initialization.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>

1 files changed, 60 insertions, 0 deletions

diff --git a/target/linux/generic/patches-4.4/085-0005-leds-gpio-use-OF-variant-of-LED-registering-function.patch b/target/linux/generic/patches-4.4/085-0005-leds-gpio-use-OF-variant-of-LED-registering-function.patch
new file mode 100644
index 0000000000..159fae84f4
--- /dev/null
+++ b/target/linux/generic/patches-4.4/085-0005-leds-gpio-use-OF-variant-of-LED-registering-function.patch
@@ -0,0 +1,60 @@
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Date: Mon, 6 Mar 2017 06:19:45 +0100
+Subject: [PATCH] leds: gpio: use OF variant of LED registering function
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+In leds-gpio we support LEDs specified in DT so we should use
+(devm_)of_led_classdev_register. This allows passing DT node as argument
+for use by the LED subsystem.
+
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+Acked-by: Pavel Machek <pavel@ucw.cz>
+Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
+---
+ drivers/leds/leds-gpio.c | 12 ++++++------
+ 1 file changed, 6 insertions(+), 6 deletions(-)
+
+--- a/drivers/leds/leds-gpio.c
++++ b/drivers/leds/leds-gpio.c
+@@ -87,7 +87,7 @@ static int gpio_blink_set(struct led_cla
+ 
+ static int create_gpio_led(const struct gpio_led *template,
+ 	struct gpio_led_data *led_dat, struct device *parent,
+-	gpio_blink_set_t blink_set)
++	struct device_node *np, gpio_blink_set_t blink_set)
+ {
+ 	int ret, state;
+ 
+@@ -143,7 +143,7 @@ static int create_gpio_led(const struct
+ 
+ 	INIT_WORK(&led_dat->work, gpio_led_work);
+ 
+-	return devm_led_classdev_register(parent, &led_dat->cdev);
++	return devm_of_led_classdev_register(parent, np, &led_dat->cdev);
+ }
+ 
+ static void delete_gpio_led(struct gpio_led_data *led)
+@@ -219,7 +219,7 @@ static struct gpio_leds_priv *gpio_leds_
+ 		if (fwnode_property_present(child, "retain-state-suspended"))
+ 			led.retain_state_suspended = 1;
+ 
+-		ret = create_gpio_led(&led, led_dat, dev, NULL);
++		ret = create_gpio_led(&led, led_dat, dev, np, NULL);
+ 		if (ret < 0) {
+ 			fwnode_handle_put(child);
+ 			goto err;
+@@ -256,9 +256,9 @@ static int gpio_led_probe(struct platfor
+ 
+ 		priv->num_leds = pdata->num_leds;
+ 		for (i = 0; i < priv->num_leds; i++) {
+-			ret = create_gpio_led(&pdata->leds[i],
+-					      &priv->leds[i],
+-					      &pdev->dev, pdata->gpio_blink_set);
++			ret = create_gpio_led(&pdata->leds[i], &priv->leds[i],
++					      &pdev->dev, NULL,
++					      pdata->gpio_blink_set);
+ 			if (ret < 0)
+ 				return ret;
+ 		}