Commit 6a09ae82 authored by Richard Leitner's avatar Richard Leitner Committed by Lee Jones
Browse files

leds: flash: Add support for flash/strobe duration 



Add support for the new V4L2_CID_FLASH_DURATION control to the LEDs
driver.

Signed-off-by: default avatarRichard Leitner <richard.leitner@linux.dev>
Link: https://lore.kernel.org/r/20250507-ov9282-flash-strobe-v4-2-72b299c1b7c9@linux.dev


Signed-off-by: default avatarLee Jones <lee@kernel.org>
parent f1c86ab9

drivers/leds/led-class-flash.c

+15 −0
Original line number Diff line number Diff line
@@ -440,6 +440,21 @@ int led_update_flash_brightness(struct led_classdev_flash *fled_cdev) 
}

EXPORT_SYMBOL_GPL(led_update_flash_brightness);



int led_set_flash_duration(struct led_classdev_flash *fled_cdev, u32 duration)

{

	struct led_classdev *led_cdev = &fled_cdev->led_cdev;

	struct led_flash_setting *s = &fled_cdev->duration;



	s->val = duration;

	led_clamp_align(s);



	if (!(led_cdev->flags & LED_SUSPENDED))

		return call_flash_op(fled_cdev, duration_set, s->val);



	return 0;

}

EXPORT_SYMBOL_GPL(led_set_flash_duration);



MODULE_AUTHOR("Jacek Anaszewski <j.anaszewski@samsung.com>");

MODULE_DESCRIPTION("LED Flash class interface");

MODULE_LICENSE("GPL v2");

include/linux/led-class-flash.h

+16 −0
Original line number Diff line number Diff line
@@ -45,6 +45,8 @@ struct led_flash_ops { 
	int (*timeout_set)(struct led_classdev_flash *fled_cdev, u32 timeout);

	/* get the flash LED fault */

	int (*fault_get)(struct led_classdev_flash *fled_cdev, u32 *fault);

	/* set flash duration */

	int (*duration_set)(struct led_classdev_flash *fled_cdev, u32 duration);

};



/*
@@ -75,6 +77,9 @@ struct led_classdev_flash { 
	/* flash timeout value in microseconds along with its constraints */

	struct led_flash_setting timeout;



	/* flash timeout value in microseconds along with its constraints */

	struct led_flash_setting duration;



	/* LED Flash class sysfs groups */

	const struct attribute_group *sysfs_groups[LED_FLASH_SYSFS_GROUPS_SIZE];

};
@@ -209,4 +214,15 @@ int led_set_flash_timeout(struct led_classdev_flash *fled_cdev, u32 timeout); 
 */

int led_get_flash_fault(struct led_classdev_flash *fled_cdev, u32 *fault);



/**

 * led_set_flash_duration - set flash LED duration

 * @fled_cdev: the flash LED to set

 * @timeout: the flash duration to set it to

 *

 * Set the flash strobe duration.

 *

 * Returns: 0 on success or negative error value on failure

 */

int led_set_flash_duration(struct led_classdev_flash *fled_cdev, u32 duration);



#endif	/* __LINUX_FLASH_LEDS_H_INCLUDED */