cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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restart-poweroff.c (1588B)

      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
     17static void restart_poweroff_do_poweroff(void)
     18{
     19	reboot_mode = REBOOT_HARD;
     20	machine_restart(NULL);
     21}
     22
     23static int restart_poweroff_probe(struct platform_device *pdev)
     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
     36static int restart_poweroff_remove(struct platform_device *pdev)
     37{
     38	if (pm_power_off == &restart_poweroff_do_poweroff)
     39		pm_power_off = NULL;
     40
     41	return 0;
     42}
     43
     44static const struct of_device_id of_restart_poweroff_match[] = {
     45	{ .compatible = "restart-poweroff", },
     46	{},
     47};
     48MODULE_DEVICE_TABLE(of, of_restart_poweroff_match);
     49
     50static struct platform_driver restart_poweroff_driver = {
     51	.probe = restart_poweroff_probe,
     52	.remove = restart_poweroff_remove,
     53	.driver = {
     54		.name = "poweroff-restart",
     55		.of_match_table = of_restart_poweroff_match,
     56	},
     57};
     58module_platform_driver(restart_poweroff_driver);
     59
     60MODULE_AUTHOR("Andrew Lunn <andrew@lunn.ch");
     61MODULE_DESCRIPTION("restart poweroff driver");
     62MODULE_LICENSE("GPL v2");
     63MODULE_ALIAS("platform:poweroff-restart");