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leds: flash: Add devm_* functions to the flash class

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Add the missing device managed API for registration and
unregistration for the LED flash class.

Signed-off-by: Dan Murphy <dmurphy@ti.com>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
This commit is contained in:
Dan Murphy 2019-10-02 07:40:38 -05:00 committed by Pavel
parent 57e5c31e53
commit 20cdba9d9c
2 changed files with 64 additions and 0 deletions
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50
drivers/leds/led-class-flash.c
View File

@ -327,6 +327,56 @@ void led_classdev_flash_unregister(struct led_classdev_flash *fled_cdev)
}
EXPORT_SYMBOL_GPL(led_classdev_flash_unregister);
static void devm_led_classdev_flash_release(struct device *dev, void *res)
{
led_classdev_flash_unregister(*(struct led_classdev_flash **)res);
}
int devm_led_classdev_flash_register_ext(struct device *parent,
struct led_classdev_flash *fled_cdev,
struct led_init_data *init_data)
{
struct led_classdev_flash **dr;
int ret;
dr = devres_alloc(devm_led_classdev_flash_release, sizeof(*dr),
GFP_KERNEL);
if (!dr)
return -ENOMEM;
ret = led_classdev_flash_register_ext(parent, fled_cdev, init_data);
if (ret) {
devres_free(dr);
return ret;
}
*dr = fled_cdev;
devres_add(parent, dr);
return 0;
}
EXPORT_SYMBOL_GPL(devm_led_classdev_flash_register_ext);
static int devm_led_classdev_flash_match(struct device *dev,
void *res, void *data)
{
struct led_classdev_flash **p = res;
if (WARN_ON(!p || !*p))
return 0;
return *p == data;
}
void devm_led_classdev_flash_unregister(struct device *dev,
struct led_classdev_flash *fled_cdev)
{
WARN_ON(devres_release(dev,
devm_led_classdev_flash_release,
devm_led_classdev_flash_match, fled_cdev));
}
EXPORT_SYMBOL_GPL(devm_led_classdev_flash_unregister);
static void led_clamp_align(struct led_flash_setting *s)
{
u32 v, offset;

14
include/linux/led-class-flash.h
View File

@ -113,6 +113,20 @@ static inline int led_classdev_flash_register(struct device *parent,
*/
void led_classdev_flash_unregister(struct led_classdev_flash *fled_cdev);
int devm_led_classdev_flash_register_ext(struct device *parent,
struct led_classdev_flash *fled_cdev,
struct led_init_data *init_data);
static inline int devm_led_classdev_flash_register(struct device *parent,
struct led_classdev_flash *fled_cdev)
{
return devm_led_classdev_flash_register_ext(parent, fled_cdev, NULL);
}
void devm_led_classdev_flash_unregister(struct device *parent,
struct led_classdev_flash *fled_cdev);
/**
* led_set_flash_strobe - setup flash strobe
* @fled_cdev: the flash LED to set strobe on