Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/*
 * poweroff.c - sysrq handler to gracefully power down machine.
 *
 * This file is released under the GPL v2
 */
 
#include <linux/kernel.h>
#include <linux/sysrq.h>
#include <linux/init.h>
#include <linux/pm.h>
#include <linux/workqueue.h>
#include <linux/reboot.h>
 
/*
 * When the user hits Sys-Rq o to power down the machine this is the
 * callback we use.
 */
 
static void do_poweroff(struct work_struct *dummy)
{
	kernel_power_off();
}
 
static DECLARE_WORK(poweroff_work, do_poweroff);
 
static void handle_poweroff(int key, struct tty_struct *tty)
{
	schedule_work(&poweroff_work);
}
 
static struct sysrq_key_op	sysrq_poweroff_op = {
	.handler        = handle_poweroff,
	.help_msg       = "powerOff",
	.action_msg     = "Power Off",
 	.enable_mask	= SYSRQ_ENABLE_BOOT,
};
 
static int pm_sysrq_init(void)
{
	register_sysrq_key('o', &sysrq_poweroff_op);
	return 0;
}
 
subsys_initcall(pm_sysrq_init);