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 <asm/hardware.h>
19 #include <asm/leds.h>
20 #include <asm/system.h>
21 #include <asm/mach-types.h>
22 
23 static spinlock_t leds_lock;
24 
ebsa110_leds_event(led_event_t ledevt)25 static 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 
leds_init(void)43 static 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