1/* SPDX-License-Identifier: GPL-2.0 */
2/* LED Multicolor class interface
3 * Copyright (C) 2019-20 Texas Instruments Incorporated - http://www.ti.com/
4 */
5
6#ifndef _LINUX_MULTICOLOR_LEDS_H_INCLUDED
7#define _LINUX_MULTICOLOR_LEDS_H_INCLUDED
8
9#include <linux/leds.h>
10#include <dt-bindings/leds/common.h>
11
12struct mc_subled {
13 unsigned int color_index;
14 unsigned int brightness;
15 unsigned int intensity;
16 unsigned int channel;
17};
18
19struct led_classdev_mc {
20 /* led class device */
21 struct led_classdev led_cdev;
22 unsigned int num_colors;
23
24 struct mc_subled *subled_info;
25};
26
27static inline struct led_classdev_mc *lcdev_to_mccdev(
28 struct led_classdev *led_cdev)
29{
30 return container_of(led_cdev, struct led_classdev_mc, led_cdev);
31}
32
33#if IS_ENABLED(CONFIG_LEDS_CLASS_MULTICOLOR)
34/**
35 * led_classdev_multicolor_register_ext - register a new object of led_classdev
36 * class with support for multicolor LEDs
37 * @parent: the multicolor LED to register
38 * @mcled_cdev: the led_classdev_mc structure for this device
39 * @init_data: the LED class multicolor device initialization data
40 *
41 * Returns: 0 on success or negative error value on failure
42 */
43int led_classdev_multicolor_register_ext(struct device *parent,
44 struct led_classdev_mc *mcled_cdev,
45 struct led_init_data *init_data);
46
47/**
48 * led_classdev_multicolor_unregister - unregisters an object of led_classdev
49 * class with support for multicolor LEDs
50 * @mcled_cdev: the multicolor LED to unregister
51 *
52 * Unregister a previously registered via led_classdev_multicolor_register
53 * object
54 */
55void led_classdev_multicolor_unregister(struct led_classdev_mc *mcled_cdev);
56
57/* Calculate brightness for the monochrome LED cluster */
58int led_mc_calc_color_components(struct led_classdev_mc *mcled_cdev,
59 enum led_brightness brightness);
60
61int devm_led_classdev_multicolor_register_ext(struct device *parent,
62 struct led_classdev_mc *mcled_cdev,
63 struct led_init_data *init_data);
64
65void devm_led_classdev_multicolor_unregister(struct device *parent,
66 struct led_classdev_mc *mcled_cdev);
67#else
68
69static inline int led_classdev_multicolor_register_ext(struct device *parent,
70 struct led_classdev_mc *mcled_cdev,
71 struct led_init_data *init_data)
72{
73 return 0;
74}
75
76static inline void led_classdev_multicolor_unregister(struct led_classdev_mc *mcled_cdev) {};
77static inline int led_mc_calc_color_components(struct led_classdev_mc *mcled_cdev,
78 enum led_brightness brightness)
79{
80 return 0;
81}
82
83static inline int devm_led_classdev_multicolor_register_ext(struct device *parent,
84 struct led_classdev_mc *mcled_cdev,
85 struct led_init_data *init_data)
86{
87 return 0;
88}
89
90static inline void devm_led_classdev_multicolor_unregister(struct device *parent,
91 struct led_classdev_mc *mcled_cdev)
92{};
93
94#endif /* IS_ENABLED(CONFIG_LEDS_CLASS_MULTICOLOR) */
95
96static inline int led_classdev_multicolor_register(struct device *parent,
97 struct led_classdev_mc *mcled_cdev)
98{
99 return led_classdev_multicolor_register_ext(parent, mcled_cdev, NULL);
100}
101
102static inline int devm_led_classdev_multicolor_register(struct device *parent,
103 struct led_classdev_mc *mcled_cdev)
104{
105 return devm_led_classdev_multicolor_register_ext(parent, mcled_cdev,
106 NULL);
107}
108
109#endif /* _LINUX_MULTICOLOR_LEDS_H_INCLUDED */
110

source code of linux/include/linux/led-class-multicolor.h