1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * LEDs driver for the "User LED" on Routerboard532
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2009 Phil Sutter <n0-1@freewrt.org>
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * Based on leds-cobalt-qube.c by Florian Fainelly and
8*4882a593Smuzhiyun * rb-diag.c (my own standalone driver for both LED and
9*4882a593Smuzhiyun * button of Routerboard532).
10*4882a593Smuzhiyun */
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #include <linux/leds.h>
13*4882a593Smuzhiyun #include <linux/module.h>
14*4882a593Smuzhiyun #include <linux/platform_device.h>
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun #include <asm/mach-rc32434/gpio.h>
17*4882a593Smuzhiyun #include <asm/mach-rc32434/rb.h>
18*4882a593Smuzhiyun
rb532_led_set(struct led_classdev * cdev,enum led_brightness brightness)19*4882a593Smuzhiyun static void rb532_led_set(struct led_classdev *cdev,
20*4882a593Smuzhiyun enum led_brightness brightness)
21*4882a593Smuzhiyun {
22*4882a593Smuzhiyun if (brightness)
23*4882a593Smuzhiyun set_latch_u5(LO_ULED, 0);
24*4882a593Smuzhiyun else
25*4882a593Smuzhiyun set_latch_u5(0, LO_ULED);
26*4882a593Smuzhiyun }
27*4882a593Smuzhiyun
rb532_led_get(struct led_classdev * cdev)28*4882a593Smuzhiyun static enum led_brightness rb532_led_get(struct led_classdev *cdev)
29*4882a593Smuzhiyun {
30*4882a593Smuzhiyun return (get_latch_u5() & LO_ULED) ? LED_FULL : LED_OFF;
31*4882a593Smuzhiyun }
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun static struct led_classdev rb532_uled = {
34*4882a593Smuzhiyun .name = "uled",
35*4882a593Smuzhiyun .brightness_set = rb532_led_set,
36*4882a593Smuzhiyun .brightness_get = rb532_led_get,
37*4882a593Smuzhiyun .default_trigger = "nand-disk",
38*4882a593Smuzhiyun };
39*4882a593Smuzhiyun
rb532_led_probe(struct platform_device * pdev)40*4882a593Smuzhiyun static int rb532_led_probe(struct platform_device *pdev)
41*4882a593Smuzhiyun {
42*4882a593Smuzhiyun return led_classdev_register(&pdev->dev, &rb532_uled);
43*4882a593Smuzhiyun }
44*4882a593Smuzhiyun
rb532_led_remove(struct platform_device * pdev)45*4882a593Smuzhiyun static int rb532_led_remove(struct platform_device *pdev)
46*4882a593Smuzhiyun {
47*4882a593Smuzhiyun led_classdev_unregister(&rb532_uled);
48*4882a593Smuzhiyun return 0;
49*4882a593Smuzhiyun }
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun static struct platform_driver rb532_led_driver = {
52*4882a593Smuzhiyun .probe = rb532_led_probe,
53*4882a593Smuzhiyun .remove = rb532_led_remove,
54*4882a593Smuzhiyun .driver = {
55*4882a593Smuzhiyun .name = "rb532-led",
56*4882a593Smuzhiyun },
57*4882a593Smuzhiyun };
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun module_platform_driver(rb532_led_driver);
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun MODULE_LICENSE("GPL");
62*4882a593Smuzhiyun MODULE_DESCRIPTION("User LED support for Routerboard532");
63*4882a593Smuzhiyun MODULE_AUTHOR("Phil Sutter <n0-1@freewrt.org>");
64*4882a593Smuzhiyun MODULE_ALIAS("platform:rb532-led");
65