Kernel/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2025-01-01 10:45:49 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

leds: Provide devm_of_led_get_optional()

Browse Source 
Add an optional variant of devm_of_led_get(). It behaves the same as
devm_of_led_get() except where the LED doesn't exist. In this case,
instead of returning -ENOENT, the function returns NULL.

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@traphandler.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20230728153731.3742339-2-jjhiblot@traphandler.com
Signed-off-by: Lee Jones <lee@kernel.org>
This commit is contained in:
Jean-Jacques Hiblot 2023-07-28 17:37:28 +02:00 committed by Lee Jones
parent 179507fcd5
commit afb4815322
2 changed files with 27 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
drivers/leds/led-class.c
View File

@ -402,6 +402,31 @@ void led_remove_lookup(struct led_lookup_data *led_lookup)
}
EXPORT_SYMBOL_GPL(led_remove_lookup);
/**
* devm_of_led_get_optional - Resource-managed request of an optional LED device
* @dev: LED consumer
* @index: index of the LED to obtain in the consumer
*
* The device node of the device is parsed to find the requested LED device.
* The LED device returned from this function is automatically released
* on driver detach.
*
* @return a pointer to a LED device, ERR_PTR(errno) on failure and NULL if the
* led was not found.
*/
struct led_classdev *__must_check devm_of_led_get_optional(struct device *dev,
int index)
{
struct led_classdev *led;
led = devm_of_led_get(dev, index);
if (IS_ERR(led) && PTR_ERR(led) == -ENOENT)
return NULL;
return led;
}
EXPORT_SYMBOL_GPL(devm_of_led_get_optional);
static int led_classdev_next_name(const char *init_name, char *name,
size_t len)
{

2
include/linux/leds.h
View File

@ -313,6 +313,8 @@ extern struct led_classdev *of_led_get(struct device_node *np, int index);
extern void led_put(struct led_classdev *led_cdev);
struct led_classdev *__must_check devm_of_led_get(struct device *dev,
int index);
struct led_classdev *__must_check devm_of_led_get_optional(struct device *dev,
int index);
/**
* led_blink_set - set blinking with software fallback