drivers/leds/leds-rb532.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * LEDs driver for the "User LED" on Routerboard532
0004  *
0005  * Copyright (C) 2009 Phil Sutter <n0-1@freewrt.org>
0006  *
0007  * Based on leds-cobalt-qube.c by Florian Fainelly and
0008  * rb-diag.c (my own standalone driver for both LED and
0009  * button of Routerboard532).
0010  */
0011
0012 #include <linux/leds.h>
0013 #include <linux/module.h>
0014 #include <linux/platform_device.h>
0015
0016 #include <asm/mach-rc32434/gpio.h>
0017 #include <asm/mach-rc32434/rb.h>
0018
0019 static void rb532_led_set(struct led_classdev *cdev,
0020               enum led_brightness brightness)
0021 {
0022     if (brightness)
0023         set_latch_u5(LO_ULED, 0);
0024     else
0025         set_latch_u5(0, LO_ULED);
0026 }
0027
0028 static enum led_brightness rb532_led_get(struct led_classdev *cdev)
0029 {
0030     return (get_latch_u5() & LO_ULED) ? LED_FULL : LED_OFF;
0031 }
0032
0033 static struct led_classdev rb532_uled = {
0034     .name = "uled",
0035     .brightness_set = rb532_led_set,
0036     .brightness_get = rb532_led_get,
0037     .default_trigger = "nand-disk",
0038 };
0039
0040 static int rb532_led_probe(struct platform_device *pdev)
0041 {
0042     return led_classdev_register(&pdev->dev, &rb532_uled);
0043 }
0044
0045 static int rb532_led_remove(struct platform_device *pdev)
0046 {
0047     led_classdev_unregister(&rb532_uled);
0048     return 0;
0049 }
0050
0051 static struct platform_driver rb532_led_driver = {
0052     .probe = rb532_led_probe,
0053     .remove = rb532_led_remove,
0054     .driver = {
0055         .name = "rb532-led",
0056     },
0057 };
0058
0059 module_platform_driver(rb532_led_driver);
0060
0061 MODULE_LICENSE("GPL");
0062 MODULE_DESCRIPTION("User LED support for Routerboard532");
0063 MODULE_AUTHOR("Phil Sutter <n0-1@freewrt.org>");
0064 MODULE_ALIAS("platform:rb532-led");