1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * LEDs driver for the "User LED" on Routerboard532
4 *
5 * Copyright (C) 2009 Phil Sutter <n0-1@freewrt.org>
6 *
7 * Based on leds-cobalt-qube.c by Florian Fainelly and
8 * rb-diag.c (my own standalone driver for both LED and
9 * button of Routerboard532).
10 */
11
12#include <linux/leds.h>
13#include <linux/module.h>
14#include <linux/platform_device.h>
15
16#include <asm/mach-rc32434/gpio.h>
17#include <asm/mach-rc32434/rb.h>
18
19static void rb532_led_set(struct led_classdev *cdev,
20			  enum led_brightness brightness)
21{
22	if (brightness)
23		set_latch_u5(LO_ULED, 0);
24	else
25		set_latch_u5(0, LO_ULED);
26}
27
28static enum led_brightness rb532_led_get(struct led_classdev *cdev)
29{
30	return (get_latch_u5() & LO_ULED) ? LED_FULL : LED_OFF;
31}
32
33static struct led_classdev rb532_uled = {
34	.name = "uled",
35	.brightness_set = rb532_led_set,
36	.brightness_get = rb532_led_get,
37	.default_trigger = "nand-disk",
38};
39
40static int rb532_led_probe(struct platform_device *pdev)
41{
42	return led_classdev_register(&pdev->dev, &rb532_uled);
43}
44
45static void rb532_led_remove(struct platform_device *pdev)
46{
47	led_classdev_unregister(&rb532_uled);
48}
49
50static struct platform_driver rb532_led_driver = {
51	.probe = rb532_led_probe,
52	.remove_new = rb532_led_remove,
53	.driver = {
54		.name = "rb532-led",
55	},
56};
57
58module_platform_driver(rb532_led_driver);
59
60MODULE_LICENSE("GPL");
61MODULE_DESCRIPTION("User LED support for Routerboard532");
62MODULE_AUTHOR("Phil Sutter <n0-1@freewrt.org>");
63MODULE_ALIAS("platform:rb532-led");
64