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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
ffd8f9a7 AL |
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 | |
ffd8f9a7 AL |
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> | |
7b6d864b | 15 | #include <linux/reboot.h> |
ffd8f9a7 AL |
16 | |
17 | static void restart_poweroff_do_poweroff(void) | |
18 | { | |
0713e143 GR |
19 | reboot_mode = REBOOT_HARD; |
20 | machine_restart(NULL); | |
ffd8f9a7 AL |
21 | } |
22 | ||
60a1c4d4 | 23 | static int restart_poweroff_probe(struct platform_device *pdev) |
ffd8f9a7 AL |
24 | { |
25 | /* If a pm_power_off function has already been added, leave it alone */ | |
26 | if (pm_power_off != NULL) { | |
27 | dev_err(&pdev->dev, | |
28 | "pm_power_off function already registered"); | |
29 | return -EBUSY; | |
30 | } | |
31 | ||
32 | pm_power_off = &restart_poweroff_do_poweroff; | |
33 | return 0; | |
34 | } | |
35 | ||
60a1c4d4 | 36 | static int restart_poweroff_remove(struct platform_device *pdev) |
ffd8f9a7 AL |
37 | { |
38 | if (pm_power_off == &restart_poweroff_do_poweroff) | |
39 | pm_power_off = NULL; | |
40 | ||
41 | return 0; | |
42 | } | |
43 | ||
44 | static const struct of_device_id of_restart_poweroff_match[] = { | |
45 | { .compatible = "restart-poweroff", }, | |
46 | {}, | |
47 | }; | |
48 | ||
49 | static struct platform_driver restart_poweroff_driver = { | |
50 | .probe = restart_poweroff_probe, | |
60a1c4d4 | 51 | .remove = restart_poweroff_remove, |
ffd8f9a7 AL |
52 | .driver = { |
53 | .name = "poweroff-restart", | |
ffd8f9a7 AL |
54 | .of_match_table = of_restart_poweroff_match, |
55 | }, | |
56 | }; | |
57 | module_platform_driver(restart_poweroff_driver); | |
58 | ||
59 | MODULE_AUTHOR("Andrew Lunn <andrew@lunn.ch"); | |
60 | MODULE_DESCRIPTION("restart poweroff driver"); | |
661468b4 | 61 | MODULE_LICENSE("GPL v2"); |
ffd8f9a7 | 62 | MODULE_ALIAS("platform:poweroff-restart"); |