arch/arm/mach-imx/leds-mx1ads.c

   1 /*
   2  * linux/arch/arm/mach-imx/leds-mx1ads.c
   3  *
   4  * Copyright (c) 2004 Sascha Hauer <sascha@saschahauer.de>
   5  *
   6  * Original (leds-footbridge.c) by Russell King
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  */
  13
  14 #include <linux/kernel.h>
  15 #include <linux/init.h>
  16 #include <asm/hardware.h>
  17 #include <asm/system.h>
  18 #include <asm/io.h>
  19 #include <asm/leds.h>
  20 #include <asm/mach-types.h>
  21 #include "leds.h"
  22
  23 /*
  24  * The MX1ADS Board has only one usable LED,
  25  * so select only the timer led or the
  26  * cpu usage led
  27  */
  28 void
  29 mx1ads_leds_event(led_event_t ledevt)
  30 {
  31         unsigned long flags;
  32
  33         local_irq_save(flags);
  34
  35         switch (ledevt) {
  36 #ifdef CONFIG_LEDS_CPU
  37         case led_idle_start:
  38                 DR(0) &= ~(1<<2);
  39                 break;
  40
  41         case led_idle_end:
  42                 DR(0) |= 1<<2;
  43                 break;
  44 #endif
  45
  46 #ifdef CONFIG_LEDS_TIMER
  47         case led_timer:
  48                 DR(0) ^= 1<<2;
  49 #endif
  50         default:
  51                 break;
  52         }
  53         local_irq_restore(flags);
  54 }