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1da177e4 LT |
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 | ||
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 | ||
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); |