linux/drivers/leds/leds-rb532.c
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   1/*
   2 * LEDs driver for the "User LED" on Routerboard532
   3 *
   4 * Copyright (C) 2009 Phil Sutter <n0-1@freewrt.org>
   5 *
   6 * Based on leds-cobalt-qube.c by Florian Fainelly and
   7 * rb-diag.c (my own standalone driver for both LED and
   8 * button of Routerboard532).
   9 */
  10
  11#include <linux/leds.h>
  12#include <linux/module.h>
  13#include <linux/platform_device.h>
  14
  15#include <asm/mach-rc32434/gpio.h>
  16#include <asm/mach-rc32434/rb.h>
  17
  18static void rb532_led_set(struct led_classdev *cdev,
  19                          enum led_brightness brightness)
  20{
  21        if (brightness)
  22                set_latch_u5(LO_ULED, 0);
  23
  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 __devinit rb532_led_probe(struct platform_device *pdev)
  41{
  42        return led_classdev_register(&pdev->dev, &rb532_uled);
  43}
  44
  45static int __devexit rb532_led_remove(struct platform_device *pdev)
  46{
  47        led_classdev_unregister(&rb532_uled);
  48        return 0;
  49}
  50
  51static struct platform_driver rb532_led_driver = {
  52        .probe = rb532_led_probe,
  53        .remove = __devexit_p(rb532_led_remove),
  54        .driver = {
  55                .name = "rb532-led",
  56                .owner = THIS_MODULE,
  57        },
  58};
  59
  60module_platform_driver(rb532_led_driver);
  61
  62MODULE_LICENSE("GPL");
  63MODULE_DESCRIPTION("User LED support for Routerboard532");
  64MODULE_AUTHOR("Phil Sutter <n0-1@freewrt.org>");
  65MODULE_ALIAS("platform:rb532-led");
  66
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