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 17 static int restart_poweroff_do_poweroff(struct sys_off_data *data) 18 { 19 reboot_mode = REBOOT_HARD; 20 machine_restart(NULL); 21 return NOTIFY_DONE; 22 } 23 24 static int restart_poweroff_probe(struct platform_device *pdev) 25 { 26 /* Set this handler to low priority to not override an existing handler */ 27 return devm_register_sys_off_handler(&pdev->dev, 28 SYS_OFF_MODE_POWER_OFF, 29 SYS_OFF_PRIO_LOW, 30 restart_poweroff_do_poweroff, 31 NULL); 32 } 33 34 static const struct of_device_id of_restart_poweroff_match[] = { 35 { .compatible = "restart-poweroff", }, 36 {}, 37 }; 38 MODULE_DEVICE_TABLE(of, of_restart_poweroff_match); 39 40 static struct platform_driver restart_poweroff_driver = { 41 .probe = restart_poweroff_probe, 42 .driver = { 43 .name = "poweroff-restart", 44 .of_match_table = of_restart_poweroff_match, 45 }, 46 }; 47 module_platform_driver(restart_poweroff_driver); 48 49 MODULE_AUTHOR("Andrew Lunn <andrew@lunn.ch"); 50 MODULE_DESCRIPTION("restart poweroff driver"); 51 MODULE_ALIAS("platform:poweroff-restart"); 52