Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / power / reset / restart-poweroff.c

diff --git a/kernel/drivers/power/reset/restart-poweroff.c b/kernel/drivers/power/reset/restart-poweroff.c
new file mode 100644 (file)
index 0000000..41b22c4
--- /dev/null
+++ b/kernel/drivers/power/reset/restart-poweroff.c
@@ -0,0 +1,65 @@
+/*
+ * 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");