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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109/* SPDX-License-Identifier: GPL-2.0 *//* LED Multicolor class interface * Copyright (C) 2019-20 Texas Instruments Incorporated - http://www.ti.com/ */
#ifndef _LINUX_MULTICOLOR_LEDS_H_INCLUDED#define _LINUX_MULTICOLOR_LEDS_H_INCLUDED
#include <linux/leds.h>#include <dt-bindings/leds/common.h>
/** * struct mc_subled - Color component description. * @color_index: Color ID. * @brightness: Scaled intensity. * @intensity: Current intensity. * @max_intensity: Maximum supported intensity value. * @channel: Channel index. * * Describes a color component of a multicolor LED. Many multicolor LEDs * do not support global brightness control in hardware, so they use * the brightness field in connection with led_mc_calc_color_components() * to perform the intensity scaling in software. * Such drivers should set max_intensity to 0 to signal the multicolor LED core * that the maximum global brightness of the LED class device should be used for * limiting incoming intensity values. * * Multicolor LEDs that do support global brightness control in hardware * should instead set max_intensity to the maximum intensity value supported * by the hardware for a given color component. */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 */