67 строки
1.7 KiB
C
67 строки
1.7 KiB
C
/*
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* Power off by restarting and let u-boot keep hold of the machine
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* until the user presses a button for example.
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*
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* Andrew Lunn <andrew@lunn.ch>
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*
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* Copyright (C) 2012 Andrew Lunn
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/of_platform.h>
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#include <linux/module.h>
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#include <linux/reboot.h>
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#include <asm/system_misc.h>
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static void restart_poweroff_do_poweroff(void)
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{
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arm_pm_restart(REBOOT_HARD, NULL);
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}
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static int restart_poweroff_probe(struct platform_device *pdev)
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{
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/* If a pm_power_off function has already been added, leave it alone */
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if (pm_power_off != NULL) {
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dev_err(&pdev->dev,
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"pm_power_off function already registered");
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return -EBUSY;
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}
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pm_power_off = &restart_poweroff_do_poweroff;
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return 0;
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}
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static int restart_poweroff_remove(struct platform_device *pdev)
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{
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if (pm_power_off == &restart_poweroff_do_poweroff)
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pm_power_off = NULL;
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return 0;
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}
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static const struct of_device_id of_restart_poweroff_match[] = {
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{ .compatible = "restart-poweroff", },
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{},
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};
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static struct platform_driver restart_poweroff_driver = {
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.probe = restart_poweroff_probe,
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.remove = restart_poweroff_remove,
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.driver = {
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.name = "poweroff-restart",
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.owner = THIS_MODULE,
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.of_match_table = of_restart_poweroff_match,
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},
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};
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module_platform_driver(restart_poweroff_driver);
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MODULE_AUTHOR("Andrew Lunn <andrew@lunn.ch");
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MODULE_DESCRIPTION("restart poweroff driver");
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MODULE_LICENSE("GPLv2");
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MODULE_ALIAS("platform:poweroff-restart");
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