leds.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:1k
- /*
- * 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);