forked from luck/tmp_suning_uos_patched
0cd61b68c3
Untested, but this should fix up the bulk of the totally mechanical issues, and should make the actual detail fixing easier. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
93 lines
2.0 KiB
C
93 lines
2.0 KiB
C
/*
|
|
* arch/arm/mach-ixp4xx/nslu2-power.c
|
|
*
|
|
* NSLU2 Power/Reset driver
|
|
*
|
|
* Copyright (C) 2005 Tower Technologies
|
|
*
|
|
* based on nslu2-io.c
|
|
* Copyright (C) 2004 Karen Spearel
|
|
*
|
|
* Author: Alessandro Zummo <a.zummo@towertech.it>
|
|
* Maintainers: http://www.nslu2-linux.org/
|
|
*
|
|
* 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.
|
|
*
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/reboot.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/reboot.h>
|
|
|
|
#include <asm/mach-types.h>
|
|
|
|
static irqreturn_t nslu2_power_handler(int irq, void *dev_id)
|
|
{
|
|
/* Signal init to do the ctrlaltdel action, this will bypass init if
|
|
* it hasn't started and do a kernel_restart.
|
|
*/
|
|
ctrl_alt_del();
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static irqreturn_t nslu2_reset_handler(int irq, void *dev_id)
|
|
{
|
|
/* This is the paper-clip reset, it shuts the machine down directly.
|
|
*/
|
|
machine_power_off();
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int __init nslu2_power_init(void)
|
|
{
|
|
if (!(machine_is_nslu2()))
|
|
return 0;
|
|
|
|
*IXP4XX_GPIO_GPISR = 0x20400000; /* read the 2 irqs to clr */
|
|
|
|
set_irq_type(NSLU2_RB_IRQ, IRQT_LOW);
|
|
set_irq_type(NSLU2_PB_IRQ, IRQT_HIGH);
|
|
|
|
if (request_irq(NSLU2_RB_IRQ, &nslu2_reset_handler,
|
|
IRQF_DISABLED, "NSLU2 reset button", NULL) < 0) {
|
|
|
|
printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
|
|
NSLU2_RB_IRQ);
|
|
|
|
return -EIO;
|
|
}
|
|
|
|
if (request_irq(NSLU2_PB_IRQ, &nslu2_power_handler,
|
|
IRQF_DISABLED, "NSLU2 power button", NULL) < 0) {
|
|
|
|
printk(KERN_DEBUG "Power Button IRQ %d not available\n",
|
|
NSLU2_PB_IRQ);
|
|
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit nslu2_power_exit(void)
|
|
{
|
|
if (!(machine_is_nslu2()))
|
|
return;
|
|
|
|
free_irq(NSLU2_RB_IRQ, NULL);
|
|
free_irq(NSLU2_PB_IRQ, NULL);
|
|
}
|
|
|
|
module_init(nslu2_power_init);
|
|
module_exit(nslu2_power_exit);
|
|
|
|
MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
|
|
MODULE_DESCRIPTION("NSLU2 Power/Reset driver");
|
|
MODULE_LICENSE("GPL");
|