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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * poweroff.c - sysrq handler to gracefully power down machine. | |
3 | * | |
4 | * This file is released under the GPL v2 | |
5 | */ | |
6 | ||
7 | #include <linux/kernel.h> | |
8 | #include <linux/sysrq.h> | |
9 | #include <linux/init.h> | |
10 | #include <linux/pm.h> | |
11 | #include <linux/workqueue.h> | |
ff319777 | 12 | #include <linux/reboot.h> |
1da177e4 LT |
13 | |
14 | /* | |
15 | * When the user hits Sys-Rq o to power down the machine this is the | |
16 | * callback we use. | |
17 | */ | |
18 | ||
65f27f38 | 19 | static void do_poweroff(struct work_struct *dummy) |
1da177e4 | 20 | { |
ff319777 | 21 | kernel_power_off(); |
1da177e4 LT |
22 | } |
23 | ||
65f27f38 | 24 | static DECLARE_WORK(poweroff_work, do_poweroff); |
1da177e4 | 25 | |
7d12e780 | 26 | static void handle_poweroff(int key, struct tty_struct *tty) |
1da177e4 LT |
27 | { |
28 | schedule_work(&poweroff_work); | |
29 | } | |
30 | ||
31 | static struct sysrq_key_op sysrq_poweroff_op = { | |
32 | .handler = handle_poweroff, | |
33 | .help_msg = "powerOff", | |
34 | .action_msg = "Power Off", | |
35 | .enable_mask = SYSRQ_ENABLE_BOOT, | |
36 | }; | |
37 | ||
38 | static int pm_sysrq_init(void) | |
39 | { | |
40 | register_sysrq_key('o', &sysrq_poweroff_op); | |
41 | return 0; | |
42 | } | |
43 | ||
44 | subsys_initcall(pm_sysrq_init); |