Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 180 insertions, 0 deletions

diff --git a/kernel/drivers/watchdog/wm8350_wdt.c b/kernel/drivers/watchdog/wm8350_wdt.c
new file mode 100644
index 000000000..34d272ada
--- /dev/null
+++ b/kernel/drivers/watchdog/wm8350_wdt.c
@@ -0,0 +1,180 @@
+/*
+ * Watchdog driver for the wm8350
+ *
+ * Copyright (C) 2007, 2008 Wolfson Microelectronics <linux@wolfsonmicro.com>
+ *
+ * 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
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/watchdog.h>
+#include <linux/uaccess.h>
+#include <linux/mfd/wm8350/core.h>
+
+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 DEFINE_MUTEX(wdt_mutex);
+
+static struct {
+	unsigned int time;  /* Seconds */
+	u16 val;	    /* To be set in WM8350_SYSTEM_CONTROL_2 */
+} wm8350_wdt_cfgs[] = {
+	{ 1, 0x02 },
+	{ 2, 0x04 },
+	{ 4, 0x05 },
+};
+
+static int wm8350_wdt_set_timeout(struct watchdog_device *wdt_dev,
+				  unsigned int timeout)
+{
+	struct wm8350 *wm8350 = watchdog_get_drvdata(wdt_dev);
+	int ret, i;
+	u16 reg;
+
+	for (i = 0; i < ARRAY_SIZE(wm8350_wdt_cfgs); i++)
+		if (wm8350_wdt_cfgs[i].time == timeout)
+			break;
+	if (i == ARRAY_SIZE(wm8350_wdt_cfgs))
+		return -EINVAL;
+
+	mutex_lock(&wdt_mutex);
+	wm8350_reg_unlock(wm8350);
+
+	reg = wm8350_reg_read(wm8350, WM8350_SYSTEM_CONTROL_2);
+	reg &= ~WM8350_WDOG_TO_MASK;
+	reg |= wm8350_wdt_cfgs[i].val;
+	ret = wm8350_reg_write(wm8350, WM8350_SYSTEM_CONTROL_2, reg);
+
+	wm8350_reg_lock(wm8350);
+	mutex_unlock(&wdt_mutex);
+
+	wdt_dev->timeout = timeout;
+	return ret;
+}
+
+static int wm8350_wdt_start(struct watchdog_device *wdt_dev)
+{
+	struct wm8350 *wm8350 = watchdog_get_drvdata(wdt_dev);
+	int ret;
+	u16 reg;
+
+	mutex_lock(&wdt_mutex);
+	wm8350_reg_unlock(wm8350);
+
+	reg = wm8350_reg_read(wm8350, WM8350_SYSTEM_CONTROL_2);
+	reg &= ~WM8350_WDOG_MODE_MASK;
+	reg |= 0x20;
+	ret = wm8350_reg_write(wm8350, WM8350_SYSTEM_CONTROL_2, reg);
+
+	wm8350_reg_lock(wm8350);
+	mutex_unlock(&wdt_mutex);
+
+	return ret;
+}
+
+static int wm8350_wdt_stop(struct watchdog_device *wdt_dev)
+{
+	struct wm8350 *wm8350 = watchdog_get_drvdata(wdt_dev);
+	int ret;
+	u16 reg;
+
+	mutex_lock(&wdt_mutex);
+	wm8350_reg_unlock(wm8350);
+
+	reg = wm8350_reg_read(wm8350, WM8350_SYSTEM_CONTROL_2);
+	reg &= ~WM8350_WDOG_MODE_MASK;
+	ret = wm8350_reg_write(wm8350, WM8350_SYSTEM_CONTROL_2, reg);
+
+	wm8350_reg_lock(wm8350);
+	mutex_unlock(&wdt_mutex);
+
+	return ret;
+}
+
+static int wm8350_wdt_ping(struct watchdog_device *wdt_dev)
+{
+	struct wm8350 *wm8350 = watchdog_get_drvdata(wdt_dev);
+	int ret;
+	u16 reg;
+
+	mutex_lock(&wdt_mutex);
+
+	reg = wm8350_reg_read(wm8350, WM8350_SYSTEM_CONTROL_2);
+	ret = wm8350_reg_write(wm8350, WM8350_SYSTEM_CONTROL_2, reg);
+
+	mutex_unlock(&wdt_mutex);
+
+	return ret;
+}
+
+static const struct watchdog_info wm8350_wdt_info = {
+	.options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
+	.identity = "WM8350 Watchdog",
+};
+
+static const struct watchdog_ops wm8350_wdt_ops = {
+	.owner = THIS_MODULE,
+	.start = wm8350_wdt_start,
+	.stop = wm8350_wdt_stop,
+	.ping = wm8350_wdt_ping,
+	.set_timeout = wm8350_wdt_set_timeout,
+};
+
+static struct watchdog_device wm8350_wdt = {
+	.info = &wm8350_wdt_info,
+	.ops = &wm8350_wdt_ops,
+	.timeout = 4,
+	.min_timeout = 1,
+	.max_timeout = 4,
+};
+
+static int wm8350_wdt_probe(struct platform_device *pdev)
+{
+	struct wm8350 *wm8350 = platform_get_drvdata(pdev);
+
+	if (!wm8350) {
+		pr_err("No driver data supplied\n");
+		return -ENODEV;
+	}
+
+	watchdog_set_nowayout(&wm8350_wdt, nowayout);
+	watchdog_set_drvdata(&wm8350_wdt, wm8350);
+
+	/* Default to 4s timeout */
+	wm8350_wdt_set_timeout(&wm8350_wdt, 4);
+
+	return watchdog_register_device(&wm8350_wdt);
+}
+
+static int wm8350_wdt_remove(struct platform_device *pdev)
+{
+	watchdog_unregister_device(&wm8350_wdt);
+	return 0;
+}
+
+static struct platform_driver wm8350_wdt_driver = {
+	.probe = wm8350_wdt_probe,
+	.remove = wm8350_wdt_remove,
+	.driver = {
+		.name = "wm8350-wdt",
+	},
+};
+
+module_platform_driver(wm8350_wdt_driver);
+
+MODULE_AUTHOR("Mark Brown");
+MODULE_DESCRIPTION("WM8350 Watchdog");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:wm8350-wdt");