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ffd8f9a7 AL |
1 | /* |
2 | * Power off by restarting and let u-boot keep hold of the machine | |
3 | * until the user presses a button for example. | |
4 | * | |
5 | * Andrew Lunn <andrew@lunn.ch> | |
6 | * | |
7 | * Copyright (C) 2012 Andrew Lunn | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
13 | #include <linux/kernel.h> | |
14 | #include <linux/init.h> | |
15 | #include <linux/platform_device.h> | |
16 | #include <linux/of_platform.h> | |
17 | #include <linux/module.h> | |
7b6d864b | 18 | #include <linux/reboot.h> |
ffd8f9a7 AL |
19 | |
20 | static void restart_poweroff_do_poweroff(void) | |
21 | { | |
0713e143 GR |
22 | reboot_mode = REBOOT_HARD; |
23 | machine_restart(NULL); | |
ffd8f9a7 AL |
24 | } |
25 | ||
60a1c4d4 | 26 | static int restart_poweroff_probe(struct platform_device *pdev) |
ffd8f9a7 AL |
27 | { |
28 | /* If a pm_power_off function has already been added, leave it alone */ | |
29 | if (pm_power_off != NULL) { | |
30 | dev_err(&pdev->dev, | |
31 | "pm_power_off function already registered"); | |
32 | return -EBUSY; | |
33 | } | |
34 | ||
35 | pm_power_off = &restart_poweroff_do_poweroff; | |
36 | return 0; | |
37 | } | |
38 | ||
60a1c4d4 | 39 | static int restart_poweroff_remove(struct platform_device *pdev) |
ffd8f9a7 AL |
40 | { |
41 | if (pm_power_off == &restart_poweroff_do_poweroff) | |
42 | pm_power_off = NULL; | |
43 | ||
44 | return 0; | |
45 | } | |
46 | ||
47 | static const struct of_device_id of_restart_poweroff_match[] = { | |
48 | { .compatible = "restart-poweroff", }, | |
49 | {}, | |
50 | }; | |
51 | ||
52 | static struct platform_driver restart_poweroff_driver = { | |
53 | .probe = restart_poweroff_probe, | |
60a1c4d4 | 54 | .remove = restart_poweroff_remove, |
ffd8f9a7 AL |
55 | .driver = { |
56 | .name = "poweroff-restart", | |
ffd8f9a7 AL |
57 | .of_match_table = of_restart_poweroff_match, |
58 | }, | |
59 | }; | |
60 | module_platform_driver(restart_poweroff_driver); | |
61 | ||
62 | MODULE_AUTHOR("Andrew Lunn <andrew@lunn.ch"); | |
63 | MODULE_DESCRIPTION("restart poweroff driver"); | |
661468b4 | 64 | MODULE_LICENSE("GPL v2"); |
ffd8f9a7 | 65 | MODULE_ALIAS("platform:poweroff-restart"); |