[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/watchdog/softdog.c b/src/kernel/linux/v4.14/drivers/watchdog/softdog.c
new file mode 100644
index 0000000..0607406
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/watchdog/softdog.c
@@ -0,0 +1,171 @@
+/*
+ * SoftDog: A Software Watchdog Device
+ *
+ * (c) Copyright 1996 Alan Cox <alan@lxorguk.ukuu.org.uk>,
+ * All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide
+ * warranty for any of this software. This material is provided
+ * "AS-IS" and at no charge.
+ *
+ * (c) Copyright 1995 Alan Cox <alan@lxorguk.ukuu.org.uk>
+ *
+ * Software only watchdog driver. Unlike its big brother the WDT501P
+ * driver this won't always recover a failed machine.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/hrtimer.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/reboot.h>
+#include <linux/types.h>
+#include <linux/watchdog.h>
+
+#define TIMER_MARGIN 60 /* Default is 60 seconds */
+static unsigned int soft_margin = TIMER_MARGIN; /* in seconds */
+module_param(soft_margin, uint, 0);
+MODULE_PARM_DESC(soft_margin,
+ "Watchdog soft_margin in seconds. (0 < soft_margin < 65536, default="
+ __MODULE_STRING(TIMER_MARGIN) ")");
+
+static bool nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, bool, 0);
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+static int soft_noboot;
+module_param(soft_noboot, int, 0);
+MODULE_PARM_DESC(soft_noboot,
+ "Softdog action, set to 1 to ignore reboots, 0 to reboot (default=0)");
+
+static int soft_panic;
+module_param(soft_panic, int, 0);
+MODULE_PARM_DESC(soft_panic,
+ "Softdog action, set to 1 to panic, 0 to reboot (default=0)");
+
+static struct hrtimer softdog_ticktock;
+static struct hrtimer softdog_preticktock;
+
+static enum hrtimer_restart softdog_fire(struct hrtimer *timer)
+{
+ module_put(THIS_MODULE);
+ if (soft_noboot) {
+ pr_crit("Triggered - Reboot ignored\n");
+ } else if (soft_panic) {
+ pr_crit("Initiating panic\n");
+ panic("Software Watchdog Timer expired");
+ } else {
+ pr_crit("Initiating system reboot\n");
+ emergency_restart();
+ pr_crit("Reboot didn't ?????\n");
+ }
+
+ return HRTIMER_NORESTART;
+}
+
+static struct watchdog_device softdog_dev;
+
+static enum hrtimer_restart softdog_pretimeout(struct hrtimer *timer)
+{
+ watchdog_notify_pretimeout(&softdog_dev);
+
+ return HRTIMER_NORESTART;
+}
+
+static int softdog_ping(struct watchdog_device *w)
+{
+ if (!hrtimer_active(&softdog_ticktock))
+ __module_get(THIS_MODULE);
+ hrtimer_start(&softdog_ticktock, ktime_set(w->timeout, 0),
+ HRTIMER_MODE_REL);
+
+ if (IS_ENABLED(CONFIG_SOFT_WATCHDOG_PRETIMEOUT)) {
+ if (w->pretimeout)
+ hrtimer_start(&softdog_preticktock,
+ ktime_set(w->timeout - w->pretimeout, 0),
+ HRTIMER_MODE_REL);
+ else
+ hrtimer_cancel(&softdog_preticktock);
+ }
+
+ return 0;
+}
+
+static int softdog_stop(struct watchdog_device *w)
+{
+ if (hrtimer_cancel(&softdog_ticktock))
+ module_put(THIS_MODULE);
+
+ if (IS_ENABLED(CONFIG_SOFT_WATCHDOG_PRETIMEOUT))
+ hrtimer_cancel(&softdog_preticktock);
+
+ return 0;
+}
+
+static struct watchdog_info softdog_info = {
+ .identity = "Software Watchdog",
+ .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
+};
+
+static const struct watchdog_ops softdog_ops = {
+ .owner = THIS_MODULE,
+ .start = softdog_ping,
+ .stop = softdog_stop,
+};
+
+static struct watchdog_device softdog_dev = {
+ .info = &softdog_info,
+ .ops = &softdog_ops,
+ .min_timeout = 1,
+ .max_timeout = 65535,
+ .timeout = TIMER_MARGIN,
+};
+
+static int __init softdog_init(void)
+{
+ int ret;
+
+ watchdog_init_timeout(&softdog_dev, soft_margin, NULL);
+ watchdog_set_nowayout(&softdog_dev, nowayout);
+ watchdog_stop_on_reboot(&softdog_dev);
+
+ hrtimer_init(&softdog_ticktock, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
+ softdog_ticktock.function = softdog_fire;
+
+ if (IS_ENABLED(CONFIG_SOFT_WATCHDOG_PRETIMEOUT)) {
+ softdog_info.options |= WDIOF_PRETIMEOUT;
+ hrtimer_init(&softdog_preticktock, CLOCK_MONOTONIC,
+ HRTIMER_MODE_REL);
+ softdog_preticktock.function = softdog_pretimeout;
+ }
+
+ ret = watchdog_register_device(&softdog_dev);
+ if (ret)
+ return ret;
+
+ pr_info("initialized. soft_noboot=%d soft_margin=%d sec soft_panic=%d (nowayout=%d)\n",
+ soft_noboot, softdog_dev.timeout, soft_panic, nowayout);
+
+ return 0;
+}
+module_init(softdog_init);
+
+static void __exit softdog_exit(void)
+{
+ watchdog_unregister_device(&softdog_dev);
+}
+module_exit(softdog_exit);
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("Software Watchdog Device Driver");
+MODULE_LICENSE("GPL");