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>v19.07.3_mercusys_ac12_duma
Rafał Miłecki
7 years ago
parent
4124847772
commit
318f2d6101
@ -0,0 +1,61 @@
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From 68620e594c250ba8c43a78e77f5296cb9952582e Mon Sep 17 00:00:00 2001
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From: Heiner Kallweit <hkallweit1@gmail.com>
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Date: Wed, 14 Sep 2016 20:54:12 +0200
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Subject: [PATCH] leds: gpio: introduce gpio_blink_set_t
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Introduce a typedef gpio_blink_set_t to improve readability of the code.
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Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
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Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
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---
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drivers/leds/leds-gpio.c | 6 ++----
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include/linux/leds.h | 9 ++++++---
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2 files changed, 8 insertions(+), 7 deletions(-)
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--- a/drivers/leds/leds-gpio.c
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+++ b/drivers/leds/leds-gpio.c
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@@ -29,8 +29,7 @@ struct gpio_led_data {
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u8 new_level;
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u8 can_sleep;
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u8 blinking;
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- int (*platform_gpio_blink_set)(struct gpio_desc *desc, int state,
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- unsigned long *delay_on, unsigned long *delay_off);
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+ gpio_blink_set_t platform_gpio_blink_set;
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};
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static void gpio_led_work(struct work_struct *work)
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@@ -88,8 +87,7 @@ static int gpio_blink_set(struct led_cla
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static int create_gpio_led(const struct gpio_led *template,
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struct gpio_led_data *led_dat, struct device *parent,
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- int (*blink_set)(struct gpio_desc *, int, unsigned long *,
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- unsigned long *))
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+ gpio_blink_set_t blink_set)
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{
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int ret, state;
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--- a/include/linux/leds.h
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+++ b/include/linux/leds.h
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@@ -330,6 +330,11 @@ struct led_platform_data {
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struct led_info *leds;
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};
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+struct gpio_desc;
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+typedef int (*gpio_blink_set_t)(struct gpio_desc *desc, int state,
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+ unsigned long *delay_on,
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+ unsigned long *delay_off);
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+
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/* For the leds-gpio driver */
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struct gpio_led {
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const char *name;
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@@ -352,9 +357,7 @@ struct gpio_led_platform_data {
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#define GPIO_LED_NO_BLINK_LOW 0 /* No blink GPIO state low */
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#define GPIO_LED_NO_BLINK_HIGH 1 /* No blink GPIO state high */
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#define GPIO_LED_BLINK 2 /* Please, blink */
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- int (*gpio_blink_set)(struct gpio_desc *desc, int state,
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- unsigned long *delay_on,
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- unsigned long *delay_off);
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+ gpio_blink_set_t gpio_blink_set;
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};
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struct platform_device *gpio_led_register_device(
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@ -0,0 +1,75 @@
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From bc2c0dd85a0a31505ca2f92bef891ddac9126725 Mon Sep 17 00:00:00 2001
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From: Heiner Kallweit <hkallweit1@gmail.com>
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Date: Wed, 14 Sep 2016 20:55:27 +0200
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Subject: [PATCH] leds: gpio: switch to managed version of
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led_classdev_register
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Using the managed version of led_classdev_register allows to
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significantly simplify the code.
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Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
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Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
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---
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drivers/leds/leds-gpio.c | 23 ++---------------------
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1 file changed, 2 insertions(+), 21 deletions(-)
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--- a/drivers/leds/leds-gpio.c
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+++ b/drivers/leds/leds-gpio.c
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@@ -143,7 +143,7 @@ static int create_gpio_led(const struct
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INIT_WORK(&led_dat->work, gpio_led_work);
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- return led_classdev_register(parent, &led_dat->cdev);
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+ return devm_led_classdev_register(parent, &led_dat->cdev);
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}
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static void delete_gpio_led(struct gpio_led_data *led)
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@@ -231,8 +231,6 @@ static struct gpio_leds_priv *gpio_leds_
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return priv;
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err:
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- for (count = priv->num_leds - 1; count >= 0; count--)
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- delete_gpio_led(&priv->leds[count]);
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return ERR_PTR(ret);
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}
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@@ -261,12 +259,8 @@ static int gpio_led_probe(struct platfor
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ret = create_gpio_led(&pdata->leds[i],
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&priv->leds[i],
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&pdev->dev, pdata->gpio_blink_set);
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- if (ret < 0) {
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- /* On failure: unwind the led creations */
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- for (i = i - 1; i >= 0; i--)
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- delete_gpio_led(&priv->leds[i]);
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+ if (ret < 0)
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return ret;
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- }
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}
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} else {
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priv = gpio_leds_create(pdev);
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@@ -279,17 +273,6 @@ static int gpio_led_probe(struct platfor
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return 0;
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}
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-static int gpio_led_remove(struct platform_device *pdev)
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-{
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- struct gpio_leds_priv *priv = platform_get_drvdata(pdev);
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- int i;
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-
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- for (i = 0; i < priv->num_leds; i++)
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- delete_gpio_led(&priv->leds[i]);
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-
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- return 0;
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-}
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-
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static void gpio_led_shutdown(struct platform_device *pdev)
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{
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struct gpio_leds_priv *priv = platform_get_drvdata(pdev);
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@@ -304,7 +287,6 @@ static void gpio_led_shutdown(struct pla
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static struct platform_driver gpio_led_driver = {
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.probe = gpio_led_probe,
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- .remove = gpio_led_remove,
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.shutdown = gpio_led_shutdown,
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.driver = {
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.name = "leds-gpio",
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@ -0,0 +1,120 @@
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From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
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Date: Mon, 6 Mar 2017 06:19:44 +0100
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Subject: [PATCH] leds: core: add OF variants of LED registering functions
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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These new functions allow passing an additional device_node argument
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that will be internally set for created LED device. Thanks to this LED
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core code and triggers will be able to access DT node for reading extra
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info.
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The easiest solution for achieving this was reworking old functions to
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more generic ones & adding simple defines for API compatibility.
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Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
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Acked-by: Pavel Machek <pavel@ucw.cz>
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Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
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---
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drivers/leds/led-class.c | 26 ++++++++++++++++----------
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include/linux/leds.h | 14 ++++++++++----
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2 files changed, 26 insertions(+), 14 deletions(-)
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--- a/drivers/leds/led-class.c
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+++ b/drivers/leds/led-class.c
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@@ -181,11 +181,14 @@ static int led_classdev_next_name(const
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}
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/**
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- * led_classdev_register - register a new object of led_classdev class.
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- * @parent: The device to register.
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+ * of_led_classdev_register - register a new object of led_classdev class.
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+ *
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+ * @parent: parent of LED device
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* @led_cdev: the led_classdev structure for this device.
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+ * @np: DT node describing this LED
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*/
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-int led_classdev_register(struct device *parent, struct led_classdev *led_cdev)
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+int of_led_classdev_register(struct device *parent, struct device_node *np,
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+ struct led_classdev *led_cdev)
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{
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char name[64];
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int ret;
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@@ -198,6 +201,7 @@ int led_classdev_register(struct device
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led_cdev, led_cdev->groups, "%s", name);
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if (IS_ERR(led_cdev->dev))
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return PTR_ERR(led_cdev->dev);
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+ led_cdev->dev->of_node = np;
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if (ret)
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dev_warn(parent, "Led %s renamed to %s due to name collision",
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@@ -230,7 +234,7 @@ int led_classdev_register(struct device
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return 0;
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}
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-EXPORT_SYMBOL_GPL(led_classdev_register);
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+EXPORT_SYMBOL_GPL(of_led_classdev_register);
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/**
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* led_classdev_unregister - unregisters a object of led_properties class.
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@@ -269,12 +273,14 @@ static void devm_led_classdev_release(st
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}
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/**
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- * devm_led_classdev_register - resource managed led_classdev_register()
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- * @parent: The device to register.
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+ * devm_of_led_classdev_register - resource managed led_classdev_register()
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+ *
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+ * @parent: parent of LED device
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* @led_cdev: the led_classdev structure for this device.
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*/
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-int devm_led_classdev_register(struct device *parent,
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- struct led_classdev *led_cdev)
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+int devm_of_led_classdev_register(struct device *parent,
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+ struct device_node *np,
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+ struct led_classdev *led_cdev)
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{
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struct led_classdev **dr;
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int rc;
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@@ -283,7 +289,7 @@ int devm_led_classdev_register(struct de
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if (!dr)
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return -ENOMEM;
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- rc = led_classdev_register(parent, led_cdev);
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+ rc = of_led_classdev_register(parent, np, led_cdev);
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if (rc) {
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devres_free(dr);
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return rc;
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@@ -294,7 +300,7 @@ int devm_led_classdev_register(struct de
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return 0;
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}
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-EXPORT_SYMBOL_GPL(devm_led_classdev_register);
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+EXPORT_SYMBOL_GPL(devm_of_led_classdev_register);
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static int devm_led_classdev_match(struct device *dev, void *res, void *data)
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{
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--- a/include/linux/leds.h
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+++ b/include/linux/leds.h
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@@ -103,10 +103,16 @@ struct led_classdev {
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struct mutex led_access;
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};
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-extern int led_classdev_register(struct device *parent,
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- struct led_classdev *led_cdev);
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-extern int devm_led_classdev_register(struct device *parent,
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- struct led_classdev *led_cdev);
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+extern int of_led_classdev_register(struct device *parent,
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+ struct device_node *np,
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+ struct led_classdev *led_cdev);
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+#define led_classdev_register(parent, led_cdev) \
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+ of_led_classdev_register(parent, NULL, led_cdev)
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+extern int devm_of_led_classdev_register(struct device *parent,
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+ struct device_node *np,
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+ struct led_classdev *led_cdev);
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+#define devm_led_classdev_register(parent, led_cdev) \
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+ devm_of_led_classdev_register(parent, NULL, led_cdev)
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extern void led_classdev_unregister(struct led_classdev *led_cdev);
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extern void devm_led_classdev_unregister(struct device *parent,
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struct led_classdev *led_cdev);
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@ -0,0 +1,60 @@
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From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
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Date: Mon, 6 Mar 2017 06:19:45 +0100
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Subject: [PATCH] leds: gpio: use OF variant of LED registering function
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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In leds-gpio we support LEDs specified in DT so we should use
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(devm_)of_led_classdev_register. This allows passing DT node as argument
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for use by the LED subsystem.
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Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
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Acked-by: Pavel Machek <pavel@ucw.cz>
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Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
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---
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drivers/leds/leds-gpio.c | 12 ++++++------
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1 file changed, 6 insertions(+), 6 deletions(-)
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--- a/drivers/leds/leds-gpio.c
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+++ b/drivers/leds/leds-gpio.c
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@@ -87,7 +87,7 @@ static int gpio_blink_set(struct led_cla
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static int create_gpio_led(const struct gpio_led *template,
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struct gpio_led_data *led_dat, struct device *parent,
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- gpio_blink_set_t blink_set)
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+ struct device_node *np, gpio_blink_set_t blink_set)
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{
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int ret, state;
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@@ -143,7 +143,7 @@ static int create_gpio_led(const struct
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INIT_WORK(&led_dat->work, gpio_led_work);
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- return devm_led_classdev_register(parent, &led_dat->cdev);
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+ return devm_of_led_classdev_register(parent, np, &led_dat->cdev);
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}
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static void delete_gpio_led(struct gpio_led_data *led)
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@@ -219,7 +219,7 @@ static struct gpio_leds_priv *gpio_leds_
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if (fwnode_property_present(child, "retain-state-suspended"))
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led.retain_state_suspended = 1;
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- ret = create_gpio_led(&led, led_dat, dev, NULL);
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+ ret = create_gpio_led(&led, led_dat, dev, np, NULL);
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if (ret < 0) {
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fwnode_handle_put(child);
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goto err;
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@@ -256,9 +256,9 @@ static int gpio_led_probe(struct platfor
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priv->num_leds = pdata->num_leds;
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for (i = 0; i < priv->num_leds; i++) {
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- ret = create_gpio_led(&pdata->leds[i],
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- &priv->leds[i],
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- &pdev->dev, pdata->gpio_blink_set);
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+ ret = create_gpio_led(&pdata->leds[i], &priv->leds[i],
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+ &pdev->dev, NULL,
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+ pdata->gpio_blink_set);
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if (ret < 0)
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return ret;
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}
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@ -0,0 +1,120 @@
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From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
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Date: Mon, 6 Mar 2017 06:19:44 +0100
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Subject: [PATCH] leds: core: add OF variants of LED registering functions
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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These new functions allow passing an additional device_node argument
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that will be internally set for created LED device. Thanks to this LED
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core code and triggers will be able to access DT node for reading extra
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info.
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The easiest solution for achieving this was reworking old functions to
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more generic ones & adding simple defines for API compatibility.
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Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
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Acked-by: Pavel Machek <pavel@ucw.cz>
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Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
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---
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drivers/leds/led-class.c | 26 ++++++++++++++++----------
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include/linux/leds.h | 14 ++++++++++----
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2 files changed, 26 insertions(+), 14 deletions(-)
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--- a/drivers/leds/led-class.c
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+++ b/drivers/leds/led-class.c
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@@ -181,11 +181,14 @@ static int led_classdev_next_name(const
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}
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/**
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- * led_classdev_register - register a new object of led_classdev class.
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- * @parent: The device to register.
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+ * of_led_classdev_register - register a new object of led_classdev class.
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+ *
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+ * @parent: parent of LED device
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* @led_cdev: the led_classdev structure for this device.
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+ * @np: DT node describing this LED
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*/
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-int led_classdev_register(struct device *parent, struct led_classdev *led_cdev)
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+int of_led_classdev_register(struct device *parent, struct device_node *np,
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+ struct led_classdev *led_cdev)
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{
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char name[64];
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int ret;
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@@ -198,6 +201,7 @@ int led_classdev_register(struct device
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led_cdev, led_cdev->groups, "%s", name);
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if (IS_ERR(led_cdev->dev))
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return PTR_ERR(led_cdev->dev);
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+ led_cdev->dev->of_node = np;
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if (ret)
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dev_warn(parent, "Led %s renamed to %s due to name collision",
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@@ -228,7 +232,7 @@ int led_classdev_register(struct device
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return 0;
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}
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-EXPORT_SYMBOL_GPL(led_classdev_register);
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+EXPORT_SYMBOL_GPL(of_led_classdev_register);
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/**
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* led_classdev_unregister - unregisters a object of led_properties class.
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@@ -270,12 +274,14 @@ static void devm_led_classdev_release(st
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}
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/**
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- * devm_led_classdev_register - resource managed led_classdev_register()
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- * @parent: The device to register.
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+ * devm_of_led_classdev_register - resource managed led_classdev_register()
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+ *
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+ * @parent: parent of LED device
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* @led_cdev: the led_classdev structure for this device.
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*/
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-int devm_led_classdev_register(struct device *parent,
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- struct led_classdev *led_cdev)
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+int devm_of_led_classdev_register(struct device *parent,
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+ struct device_node *np,
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+ struct led_classdev *led_cdev)
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{
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struct led_classdev **dr;
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int rc;
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@@ -284,7 +290,7 @@ int devm_led_classdev_register(struct de
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if (!dr)
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return -ENOMEM;
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|
||||
- rc = led_classdev_register(parent, led_cdev);
|
||||
+ rc = of_led_classdev_register(parent, np, led_cdev);
|
||||
if (rc) {
|
||||
devres_free(dr);
|
||||
return rc;
|
||||
@@ -295,7 +301,7 @@ int devm_led_classdev_register(struct de
|
||||
|
||||
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)
|
||||
{
|
||||
--- a/include/linux/leds.h
|
||||
+++ b/include/linux/leds.h
|
||||
@@ -109,10 +109,16 @@ 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);
|
||||
@ -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
|
||||
@@ -77,7 +77,7 @@ 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;
|
||||
|
||||
@@ -139,7 +139,7 @@ static int create_gpio_led(const struct
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
- return devm_led_classdev_register(parent, &led_dat->cdev);
|
||||
+ return devm_of_led_classdev_register(parent, np, &led_dat->cdev);
|
||||
}
|
||||
|
||||
struct gpio_leds_priv {
|
||||
@@ -206,7 +206,7 @@ static struct gpio_leds_priv *gpio_leds_
|
||||
if (fwnode_property_present(child, "panic-indicator"))
|
||||
led.panic_indicator = 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);
|
||||
return ERR_PTR(ret);
|
||||
@@ -240,9 +240,9 @@ 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;
|
||||
}
|
||||
Loading…
Reference in New Issue