1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Power off by restarting and let u-boot keep hold of the machine
4*4882a593Smuzhiyun * until the user presses a button for example.
5*4882a593Smuzhiyun *
6*4882a593Smuzhiyun * Andrew Lunn <andrew@lunn.ch>
7*4882a593Smuzhiyun *
8*4882a593Smuzhiyun * Copyright (C) 2012 Andrew Lunn
9*4882a593Smuzhiyun */
10*4882a593Smuzhiyun #include <linux/kernel.h>
11*4882a593Smuzhiyun #include <linux/init.h>
12*4882a593Smuzhiyun #include <linux/platform_device.h>
13*4882a593Smuzhiyun #include <linux/of_platform.h>
14*4882a593Smuzhiyun #include <linux/module.h>
15*4882a593Smuzhiyun #include <linux/reboot.h>
16*4882a593Smuzhiyun
restart_poweroff_do_poweroff(void)17*4882a593Smuzhiyun static void restart_poweroff_do_poweroff(void)
18*4882a593Smuzhiyun {
19*4882a593Smuzhiyun reboot_mode = REBOOT_HARD;
20*4882a593Smuzhiyun machine_restart(NULL);
21*4882a593Smuzhiyun }
22*4882a593Smuzhiyun
restart_poweroff_probe(struct platform_device * pdev)23*4882a593Smuzhiyun static int restart_poweroff_probe(struct platform_device *pdev)
24*4882a593Smuzhiyun {
25*4882a593Smuzhiyun /* If a pm_power_off function has already been added, leave it alone */
26*4882a593Smuzhiyun if (pm_power_off != NULL) {
27*4882a593Smuzhiyun dev_err(&pdev->dev,
28*4882a593Smuzhiyun "pm_power_off function already registered");
29*4882a593Smuzhiyun return -EBUSY;
30*4882a593Smuzhiyun }
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun pm_power_off = &restart_poweroff_do_poweroff;
33*4882a593Smuzhiyun return 0;
34*4882a593Smuzhiyun }
35*4882a593Smuzhiyun
restart_poweroff_remove(struct platform_device * pdev)36*4882a593Smuzhiyun static int restart_poweroff_remove(struct platform_device *pdev)
37*4882a593Smuzhiyun {
38*4882a593Smuzhiyun if (pm_power_off == &restart_poweroff_do_poweroff)
39*4882a593Smuzhiyun pm_power_off = NULL;
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun return 0;
42*4882a593Smuzhiyun }
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun static const struct of_device_id of_restart_poweroff_match[] = {
45*4882a593Smuzhiyun { .compatible = "restart-poweroff", },
46*4882a593Smuzhiyun {},
47*4882a593Smuzhiyun };
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun static struct platform_driver restart_poweroff_driver = {
50*4882a593Smuzhiyun .probe = restart_poweroff_probe,
51*4882a593Smuzhiyun .remove = restart_poweroff_remove,
52*4882a593Smuzhiyun .driver = {
53*4882a593Smuzhiyun .name = "poweroff-restart",
54*4882a593Smuzhiyun .of_match_table = of_restart_poweroff_match,
55*4882a593Smuzhiyun },
56*4882a593Smuzhiyun };
57*4882a593Smuzhiyun module_platform_driver(restart_poweroff_driver);
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun MODULE_AUTHOR("Andrew Lunn <andrew@lunn.ch");
60*4882a593Smuzhiyun MODULE_DESCRIPTION("restart poweroff driver");
61*4882a593Smuzhiyun MODULE_LICENSE("GPL v2");
62*4882a593Smuzhiyun MODULE_ALIAS("platform:poweroff-restart");
63