1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Power off by restarting and let u-boot keep hold of the machine |
4 | * until the user presses a button for example. |
5 | * |
6 | * Andrew Lunn <andrew@lunn.ch> |
7 | * |
8 | * Copyright (C) 2012 Andrew Lunn |
9 | */ |
10 | #include <linux/kernel.h> |
11 | #include <linux/init.h> |
12 | #include <linux/platform_device.h> |
13 | #include <linux/of_platform.h> |
14 | #include <linux/module.h> |
15 | #include <linux/reboot.h> |
16 | |
17 | static int restart_poweroff_do_poweroff(struct sys_off_data *data) |
18 | { |
19 | reboot_mode = REBOOT_HARD; |
20 | machine_restart(NULL); |
21 | return NOTIFY_DONE; |
22 | } |
23 | |
24 | static int restart_poweroff_probe(struct platform_device *pdev) |
25 | { |
26 | /* Set this handler to low priority to not override an existing handler */ |
27 | return devm_register_sys_off_handler(dev: &pdev->dev, |
28 | mode: SYS_OFF_MODE_POWER_OFF, |
29 | SYS_OFF_PRIO_LOW, |
30 | callback: restart_poweroff_do_poweroff, |
31 | NULL); |
32 | } |
33 | |
34 | static const struct of_device_id of_restart_poweroff_match[] = { |
35 | { .compatible = "restart-poweroff" , }, |
36 | {}, |
37 | }; |
38 | MODULE_DEVICE_TABLE(of, of_restart_poweroff_match); |
39 | |
40 | static struct platform_driver restart_poweroff_driver = { |
41 | .probe = restart_poweroff_probe, |
42 | .driver = { |
43 | .name = "poweroff-restart" , |
44 | .of_match_table = of_restart_poweroff_match, |
45 | }, |
46 | }; |
47 | module_platform_driver(restart_poweroff_driver); |
48 | |
49 | MODULE_AUTHOR("Andrew Lunn <andrew@lunn.ch" ); |
50 | MODULE_DESCRIPTION("restart poweroff driver" ); |
51 | MODULE_ALIAS("platform:poweroff-restart" ); |
52 | |