Rod Whitby | 3145d8a | 2006-01-04 17:17:11 +0000 | [diff] [blame] | 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 | |
Rod Whitby | 3145d8a | 2006-01-04 17:17:11 +0000 | [diff] [blame] | 20 | #include <linux/interrupt.h> |
Thomas Gleixner | 698dfe2 | 2006-07-01 23:01:49 +0100 | [diff] [blame] | 21 | #include <linux/irq.h> |
| 22 | #include <linux/module.h> |
Adrian Bunk | 83cc5ed | 2006-06-25 05:47:41 -0700 | [diff] [blame] | 23 | #include <linux/reboot.h> |
Rod Whitby | 3145d8a | 2006-01-04 17:17:11 +0000 | [diff] [blame] | 24 | |
| 25 | #include <asm/mach-types.h> |
| 26 | |
Linus Torvalds | 0cd61b6 | 2006-10-06 10:53:39 -0700 | [diff] [blame] | 27 | static irqreturn_t nas100d_reset_handler(int irq, void *dev_id) |
Rod Whitby | 3145d8a | 2006-01-04 17:17:11 +0000 | [diff] [blame] | 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 | |
| 37 | static 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 | |
Rod Whitby | 3145d8a | 2006-01-04 17:17:11 +0000 | [diff] [blame] | 44 | if (request_irq(NAS100D_RB_IRQ, &nas100d_reset_handler, |
Thomas Gleixner | 52e405e | 2006-07-03 02:20:05 +0200 | [diff] [blame] | 45 | IRQF_DISABLED, "NAS100D reset button", NULL) < 0) { |
Rod Whitby | 3145d8a | 2006-01-04 17:17:11 +0000 | [diff] [blame] | 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 | |
| 56 | static void __exit nas100d_power_exit(void) |
| 57 | { |
Alessandro Zummo | 744bfe4 | 2006-03-07 22:48:29 +0000 | [diff] [blame] | 58 | if (!(machine_is_nas100d())) |
| 59 | return; |
| 60 | |
Rod Whitby | 3145d8a | 2006-01-04 17:17:11 +0000 | [diff] [blame] | 61 | free_irq(NAS100D_RB_IRQ, NULL); |
| 62 | } |
| 63 | |
| 64 | module_init(nas100d_power_init); |
| 65 | module_exit(nas100d_power_exit); |
| 66 | |
| 67 | MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>"); |
| 68 | MODULE_DESCRIPTION("NAS100D Power/Reset driver"); |
| 69 | MODULE_LICENSE("GPL"); |