1/* 2 * arch/arm/mach-ixp4xx/nas100d-power.c 3 * 4 * NAS 100d Power/Reset driver 5 * 6 * Copyright (C) 2005 Tower Technologies 7 * 8 * based on nas100d-io.c 9 * Copyright (C) 2004 Karen Spearel 10 * 11 * Author: Alessandro Zummo <a.zummo@towertech.it> 12 * Maintainers: http://www.nslu2-linux.org/ 13 * 14 * This program is free software; you can redistribute it and/or modify 15 * it under the terms of the GNU General Public License version 2 as 16 * published by the Free Software Foundation. 17 * 18 */ 19 20#include <linux/interrupt.h> 21#include <linux/irq.h> 22#include <linux/module.h> 23#include <linux/reboot.h> 24 25#include <asm/mach-types.h> 26 27static irqreturn_t nas100d_reset_handler(int irq, void *dev_id) 28{ 29 /* Signal init to do the ctrlaltdel action, this will bypass init if 30 * it hasn't started and do a kernel_restart. 31 */ 32 ctrl_alt_del(); 33 34 return IRQ_HANDLED; 35} 36 37static int __init nas100d_power_init(void) 38{ 39 if (!(machine_is_nas100d())) 40 return 0; 41 42 set_irq_type(NAS100D_RB_IRQ, IRQT_LOW); 43 44 if (request_irq(NAS100D_RB_IRQ, &nas100d_reset_handler, 45 IRQF_DISABLED, "NAS100D reset button", NULL) < 0) { 46 47 printk(KERN_DEBUG "Reset Button IRQ %d not available\n", 48 NAS100D_RB_IRQ); 49 50 return -EIO; 51 } 52 53 return 0; 54} 55 56static void __exit nas100d_power_exit(void) 57{ 58 if (!(machine_is_nas100d())) 59 return; 60 61 free_irq(NAS100D_RB_IRQ, NULL); 62} 63 64module_init(nas100d_power_init); 65module_exit(nas100d_power_exit); 66 67MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>"); 68MODULE_DESCRIPTION("NAS100D Power/Reset driver"); 69MODULE_LICENSE("GPL"); 70