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Linux/drivers/leds/leds-rb532.c

  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 
 18 static 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 
 28 static enum led_brightness rb532_led_get(struct led_classdev *cdev)
 29 {
 30         return (get_latch_u5() & LO_ULED) ? LED_FULL : LED_OFF;
 31 }
 32 
 33 static 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 
 40 static int rb532_led_probe(struct platform_device *pdev)
 41 {
 42         return led_classdev_register(&pdev->dev, &rb532_uled);
 43 }
 44 
 45 static int rb532_led_remove(struct platform_device *pdev)
 46 {
 47         led_classdev_unregister(&rb532_uled);
 48         return 0;
 49 }
 50 
 51 static struct platform_driver rb532_led_driver = {
 52         .probe = rb532_led_probe,
 53         .remove = rb532_led_remove,
 54         .driver = {
 55                 .name = "rb532-led",
 56                 .owner = THIS_MODULE,
 57         },
 58 };
 59 
 60 module_platform_driver(rb532_led_driver);
 61 
 62 MODULE_LICENSE("GPL");
 63 MODULE_DESCRIPTION("User LED support for Routerboard532");
 64 MODULE_AUTHOR("Phil Sutter <n0-1@freewrt.org>");
 65 MODULE_ALIAS("platform:rb532-led");
 66 

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