LXR linux/arch/arm/mach-ebsa110/leds.c

   1/*
   2 *  linux/arch/arm/mach-ebsa110/leds.c
   3 *
   4 *  Copyright (C) 1998 Russell King
   5 *
   6 * This program is free software; you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License version 2 as
   8 * published by the Free Software Foundation.
   9 *
  10 *  EBSA-110 LED control routines.  We use the led as follows:
  11 *
  12 *   - Red - toggles state every 50 timer interrupts
  13 */
  14#include <linux/module.h>
  15#include <linux/spinlock.h>
  16#include <linux/init.h>
  17
  18#include <mach/hardware.h>
  19#include <asm/leds.h>
  20#include <asm/system.h>
  21#include <asm/mach-types.h>
  22
  23static spinlock_t leds_lock;
  24
  25static void ebsa110_leds_event(led_event_t ledevt)
  26{
  27        unsigned long flags;
  28
  29        spin_lock_irqsave(&leds_lock, flags);
  30
  31        switch(ledevt) {
  32        case led_timer:
  33                *(volatile unsigned char *)SOFT_BASE ^= 128;
  34                break;
  35
  36        default:
  37                break;
  38        }
  39
  40        spin_unlock_irqrestore(&leds_lock, flags);
  41}
  42
  43static int __init leds_init(void)
  44{
  45        if (machine_is_ebsa110())
  46                leds_event = ebsa110_leds_event;
  47
  48        return 0;
  49}
  50
  51__initcall(leds_init);
  52