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leds.c

/*
 *  linux/arch/arm/mach-ebsa110/leds.c
 *
 *  Copyright (C) 1998 Russell King
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 *  EBSA-110 LED control routines.  We use the led as follows:
 *
 *   - Red - toggles state every 50 timer interrupts
 */
#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/init.h>

#include <asm/hardware.h>
#include <asm/leds.h>
#include <asm/system.h>
#include <asm/mach-types.h>

static spinlock_t leds_lock;

static void ebsa110_leds_event(led_event_t ledevt)
{
      unsigned long flags;

      spin_lock_irqsave(&leds_lock, flags);

      switch(ledevt) {
      case led_timer:
            *(volatile unsigned char *)SOFT_BASE ^= 128;
            break;

      default:
            break;
      }

      spin_unlock_irqrestore(&leds_lock, flags);
}

static int __init leds_init(void)
{
      if (machine_is_ebsa110())
            leds_event = ebsa110_leds_event;

      return 0;
}

__initcall(leds_init);

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