| /* |
| * Power off by restarting and let u-boot keep hold of the machine |
| * until the user presses a button for example. |
| * |
| * Andrew Lunn <andrew@lunn.ch> |
| * |
| * Copyright (C) 2012 Andrew Lunn |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/platform_device.h> |
| #include <linux/of_platform.h> |
| #include <linux/module.h> |
| #include <linux/reboot.h> |
| |
| static void restart_poweroff_do_poweroff(void) |
| { |
| reboot_mode = REBOOT_HARD; |
| machine_restart(NULL); |
| } |
| |
| static int restart_poweroff_probe(struct platform_device *pdev) |
| { |
| /* If a pm_power_off function has already been added, leave it alone */ |
| if (pm_power_off != NULL) { |
| dev_err(&pdev->dev, |
| "pm_power_off function already registered"); |
| return -EBUSY; |
| } |
| |
| pm_power_off = &restart_poweroff_do_poweroff; |
| return 0; |
| } |
| |
| static int restart_poweroff_remove(struct platform_device *pdev) |
| { |
| if (pm_power_off == &restart_poweroff_do_poweroff) |
| pm_power_off = NULL; |
| |
| return 0; |
| } |
| |
| static const struct of_device_id of_restart_poweroff_match[] = { |
| { .compatible = "restart-poweroff", }, |
| {}, |
| }; |
| |
| static struct platform_driver restart_poweroff_driver = { |
| .probe = restart_poweroff_probe, |
| .remove = restart_poweroff_remove, |
| .driver = { |
| .name = "poweroff-restart", |
| .of_match_table = of_restart_poweroff_match, |
| }, |
| }; |
| module_platform_driver(restart_poweroff_driver); |
| |
| MODULE_AUTHOR("Andrew Lunn <andrew@lunn.ch"); |
| MODULE_DESCRIPTION("restart poweroff driver"); |
| MODULE_LICENSE("GPL v2"); |
| MODULE_ALIAS("platform:poweroff-restart"); |