1 // SPDX-License-Identifier: GPL-2.0-only
3  * LED support for the input layer
5  * Copyright 2010-2015 Samuel Thibault <samuel.thibault@ens-lyon.org>
31 	[LED_NUML]	= { "numlock", VT_TRIGGER("kbd-numlock") },
32 	[LED_CAPSL]	= { "capslock", VT_TRIGGER("kbd-capslock") },
33 	[LED_SCROLLL]	= { "scrolllock", VT_TRIGGER("kbd-scrolllock") },
35 	[LED_KANA]	= { "kana", VT_TRIGGER("kbd-kanalock") },
38 	[LED_MUTE]	= { "mute", AUDIO_TRIGGER("audio-mute") },
58 	struct input_led *led = container_of(cdev, struct input_led, cdev);  in input_leds_brightness_get()  local
59 	struct input_dev *input = led->handle->dev;  in input_leds_brightness_get()
61 	return test_bit(led->code, input->led) ? cdev->max_brightness : 0;  in input_leds_brightness_get()
67 	struct input_led *led = container_of(cdev, struct input_led, cdev);  in input_leds_brightness_set()  local
69 	input_inject_event(led->handle, EV_LED, led->code, !!brightness);  in input_leds_brightness_set()
82 	for_each_set_bit(led_code, dev->ledbit, LED_CNT)  in input_leds_get_count()
94 	struct input_led *led;  in input_leds_connect()  local
102 		return -ENXIO;  in input_leds_connect()
106 		return -ENOMEM;  in input_leds_connect()
108 	leds->num_leds = num_leds;  in input_leds_connect()
110 	leds->handle.dev = dev;  in input_leds_connect()
111 	leds->handle.handler = handler;  in input_leds_connect()
112 	leds->handle.name = "leds";  in input_leds_connect()
113 	leds->handle.private = leds;  in input_leds_connect()
115 	error = input_register_handle(&leds->handle);  in input_leds_connect()
119 	error = input_open_device(&leds->handle);  in input_leds_connect()
124 	for_each_set_bit(led_code, dev->ledbit, LED_CNT) {  in input_leds_connect()
128 		led = &leds->leds[led_no];  in input_leds_connect()
129 		led->handle = &leds->handle;  in input_leds_connect()
130 		led->code = led_code;  in input_leds_connect()
132 		led->cdev.name = kasprintf(GFP_KERNEL, "%s::%s",  in input_leds_connect()
133 					   dev_name(&dev->dev),  in input_leds_connect()
135 		if (!led->cdev.name) {  in input_leds_connect()
136 			error = -ENOMEM;  in input_leds_connect()
140 		led->cdev.max_brightness = 1;  in input_leds_connect()
141 		led->cdev.brightness_get = input_leds_brightness_get;  in input_leds_connect()
142 		led->cdev.brightness_set = input_leds_brightness_set;  in input_leds_connect()
143 		led->cdev.default_trigger = input_led_info[led_code].trigger;  in input_leds_connect()
145 		error = led_classdev_register(&dev->dev, &led->cdev);  in input_leds_connect()
147 			dev_err(&dev->dev, "failed to register LED %s: %d\n",  in input_leds_connect()
148 				led->cdev.name, error);  in input_leds_connect()
149 			kfree(led->cdev.name);  in input_leds_connect()
159 	while (--led_no >= 0) {  in input_leds_connect()
160 		struct input_led *led = &leds->leds[led_no];  in input_leds_connect()  local
162 		led_classdev_unregister(&led->cdev);  in input_leds_connect()
163 		kfree(led->cdev.name);  in input_leds_connect()
166 	input_close_device(&leds->handle);  in input_leds_connect()
169 	input_unregister_handle(&leds->handle);  in input_leds_connect()
178 	struct input_leds *leds = handle->private;  in input_leds_disconnect()
181 	for (i = 0; i < leds->num_leds; i++) {  in input_leds_disconnect()
182 		struct input_led *led = &leds->leds[i];  in input_leds_disconnect()  local
184 		led_classdev_unregister(&led->cdev);  in input_leds_disconnect()
185 		kfree(led->cdev.name);  in input_leds_disconnect()
223 MODULE_AUTHOR("Samuel Thibault <samuel.thibault@ens-lyon.org>");
225 MODULE_DESCRIPTION("Input -> LEDs Bridge");