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

https://github.com/AICP/kernel_google_msm
C | 52 lines | 28 code | 11 blank | 13 comment | 1 complexity | 22af8af244a5b95761bb58e9e0bac774 MD5 | raw file
 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/mach-types.h>
21
22#include "core.h"
23
24static spinlock_t leds_lock;
25
26static void ebsa110_leds_event(led_event_t ledevt)
27{
28	unsigned long flags;
29
30	spin_lock_irqsave(&leds_lock, flags);
31
32	switch(ledevt) {
33	case led_timer:
34		*(volatile unsigned char *)SOFT_BASE ^= 128;
35		break;
36
37	default:
38		break;
39	}
40
41	spin_unlock_irqrestore(&leds_lock, flags);
42}
43
44static int __init leds_init(void)
45{
46	if (machine_is_ebsa110())
47		leds_event = ebsa110_leds_event;
48
49	return 0;
50}
51
52__initcall(leds_init);