include/linux/led-class-multicolor.h

Source file repositories/reference/linux-study-clean/include/linux/led-class-multicolor.h

File Facts

System
Linux kernel
Corpus path
include/linux/led-class-multicolor.h
Extension
.h
Size
3754 bytes
Lines
109
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

struct mc_subled {
	unsigned int color_index;
	unsigned int brightness;
	unsigned int intensity;
	unsigned int max_intensity;
	unsigned int channel;
};

struct led_classdev_mc {
	/* led class device */
	struct led_classdev led_cdev;
	unsigned int num_colors;

	struct mc_subled *subled_info;
};

static inline struct led_classdev_mc *lcdev_to_mccdev(
						struct led_classdev *led_cdev)
{
	return container_of(led_cdev, struct led_classdev_mc, led_cdev);
}

/**
 * led_classdev_multicolor_register_ext - register a new object of led_classdev
 *				      class with support for multicolor LEDs
 * @parent: the multicolor LED to register
 * @mcled_cdev: the led_classdev_mc structure for this device
 * @init_data: the LED class multicolor device initialization data
 *
 * Returns: 0 on success or negative error value on failure
 */
int led_classdev_multicolor_register_ext(struct device *parent,
					    struct led_classdev_mc *mcled_cdev,
					    struct led_init_data *init_data);

/**
 * led_classdev_multicolor_unregister - unregisters an object of led_classdev
 *					class with support for multicolor LEDs
 * @mcled_cdev: the multicolor LED to unregister
 *
 * Unregister a previously registered via led_classdev_multicolor_register
 * object
 */
void led_classdev_multicolor_unregister(struct led_classdev_mc *mcled_cdev);

/**
 * led_mc_calc_color_components() - Calculates component brightness values of a LED cluster.
 * @mcled_cdev - Multicolor LED class device of the LED cluster.
 * @brightness - Global brightness of the LED cluster.
 *
 * Calculates the brightness values for each color component of a monochrome LED cluster,
 * see Documentation/leds/leds-class-multicolor.rst for details.
 */
int led_mc_calc_color_components(struct led_classdev_mc *mcled_cdev,
				 enum led_brightness brightness);

int devm_led_classdev_multicolor_register_ext(struct device *parent,
					  struct led_classdev_mc *mcled_cdev,
					  struct led_init_data *init_data);

void devm_led_classdev_multicolor_unregister(struct device *parent,
					    struct led_classdev_mc *mcled_cdev);

static inline int led_classdev_multicolor_register(struct device *parent,
					    struct led_classdev_mc *mcled_cdev)
{
	return led_classdev_multicolor_register_ext(parent, mcled_cdev, NULL);
}

static inline int devm_led_classdev_multicolor_register(struct device *parent,
					     struct led_classdev_mc *mcled_cdev)
{
	return devm_led_classdev_multicolor_register_ext(parent, mcled_cdev,
							 NULL);
}

#endif	/* _LINUX_MULTICOLOR_LEDS_H_INCLUDED */

Annotation

Implementation Notes