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, 304 insertions, 0 deletions

diff --git a/kernel/drivers/hwmon/tmp102.c b/kernel/drivers/hwmon/tmp102.c
new file mode 100644
index 000000000..9da2735f1
--- /dev/null
+++ b/kernel/drivers/hwmon/tmp102.c
@@ -0,0 +1,304 @@
+/* Texas Instruments TMP102 SMBus temperature sensor driver
+ *
+ * Copyright (C) 2010 Steven King <sfking@fdwdc.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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+#include <linux/device.h>
+#include <linux/jiffies.h>
+#include <linux/thermal.h>
+#include <linux/of.h>
+
+#define	DRIVER_NAME "tmp102"
+
+#define	TMP102_TEMP_REG			0x00
+#define	TMP102_CONF_REG			0x01
+/* note: these bit definitions are byte swapped */
+#define		TMP102_CONF_SD		0x0100
+#define		TMP102_CONF_TM		0x0200
+#define		TMP102_CONF_POL		0x0400
+#define		TMP102_CONF_F0		0x0800
+#define		TMP102_CONF_F1		0x1000
+#define		TMP102_CONF_R0		0x2000
+#define		TMP102_CONF_R1		0x4000
+#define		TMP102_CONF_OS		0x8000
+#define		TMP102_CONF_EM		0x0010
+#define		TMP102_CONF_AL		0x0020
+#define		TMP102_CONF_CR0		0x0040
+#define		TMP102_CONF_CR1		0x0080
+#define	TMP102_TLOW_REG			0x02
+#define	TMP102_THIGH_REG		0x03
+
+struct tmp102 {
+	struct i2c_client *client;
+	struct device *hwmon_dev;
+	struct thermal_zone_device *tz;
+	struct mutex lock;
+	u16 config_orig;
+	unsigned long last_update;
+	int temp[3];
+};
+
+/* convert left adjusted 13-bit TMP102 register value to milliCelsius */
+static inline int tmp102_reg_to_mC(s16 val)
+{
+	return ((val & ~0x01) * 1000) / 128;
+}
+
+/* convert milliCelsius to left adjusted 13-bit TMP102 register value */
+static inline u16 tmp102_mC_to_reg(int val)
+{
+	return (val * 128) / 1000;
+}
+
+static const u8 tmp102_reg[] = {
+	TMP102_TEMP_REG,
+	TMP102_TLOW_REG,
+	TMP102_THIGH_REG,
+};
+
+static struct tmp102 *tmp102_update_device(struct device *dev)
+{
+	struct tmp102 *tmp102 = dev_get_drvdata(dev);
+	struct i2c_client *client = tmp102->client;
+
+	mutex_lock(&tmp102->lock);
+	if (time_after(jiffies, tmp102->last_update + HZ / 3)) {
+		int i;
+		for (i = 0; i < ARRAY_SIZE(tmp102->temp); ++i) {
+			int status = i2c_smbus_read_word_swapped(client,
+								 tmp102_reg[i]);
+			if (status > -1)
+				tmp102->temp[i] = tmp102_reg_to_mC(status);
+		}
+		tmp102->last_update = jiffies;
+	}
+	mutex_unlock(&tmp102->lock);
+	return tmp102;
+}
+
+static int tmp102_read_temp(void *dev, long *temp)
+{
+	struct tmp102 *tmp102 = tmp102_update_device(dev);
+
+	*temp = tmp102->temp[0];
+
+	return 0;
+}
+
+static ssize_t tmp102_show_temp(struct device *dev,
+				struct device_attribute *attr,
+				char *buf)
+{
+	struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
+	struct tmp102 *tmp102 = tmp102_update_device(dev);
+
+	return sprintf(buf, "%d\n", tmp102->temp[sda->index]);
+}
+
+static ssize_t tmp102_set_temp(struct device *dev,
+			       struct device_attribute *attr,
+			       const char *buf, size_t count)
+{
+	struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
+	struct tmp102 *tmp102 = dev_get_drvdata(dev);
+	struct i2c_client *client = tmp102->client;
+	long val;
+	int status;
+
+	if (kstrtol(buf, 10, &val) < 0)
+		return -EINVAL;
+	val = clamp_val(val, -256000, 255000);
+
+	mutex_lock(&tmp102->lock);
+	tmp102->temp[sda->index] = val;
+	status = i2c_smbus_write_word_swapped(client, tmp102_reg[sda->index],
+					      tmp102_mC_to_reg(val));
+	mutex_unlock(&tmp102->lock);
+	return status ? : count;
+}
+
+static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, tmp102_show_temp, NULL , 0);
+
+static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, tmp102_show_temp,
+			  tmp102_set_temp, 1);
+
+static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, tmp102_show_temp,
+			  tmp102_set_temp, 2);
+
+static struct attribute *tmp102_attrs[] = {
+	&sensor_dev_attr_temp1_input.dev_attr.attr,
+	&sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
+	&sensor_dev_attr_temp1_max.dev_attr.attr,
+	NULL
+};
+ATTRIBUTE_GROUPS(tmp102);
+
+#define TMP102_CONFIG  (TMP102_CONF_TM | TMP102_CONF_EM | TMP102_CONF_CR1)
+#define TMP102_CONFIG_RD_ONLY (TMP102_CONF_R0 | TMP102_CONF_R1 | TMP102_CONF_AL)
+
+static const struct thermal_zone_of_device_ops tmp102_of_thermal_ops = {
+	.get_temp = tmp102_read_temp,
+};
+
+static int tmp102_probe(struct i2c_client *client,
+				  const struct i2c_device_id *id)
+{
+	struct device *dev = &client->dev;
+	struct device *hwmon_dev;
+	struct tmp102 *tmp102;
+	int status;
+
+	if (!i2c_check_functionality(client->adapter,
+				     I2C_FUNC_SMBUS_WORD_DATA)) {
+		dev_err(dev,
+			"adapter doesn't support SMBus word transactions\n");
+		return -ENODEV;
+	}
+
+	tmp102 = devm_kzalloc(dev, sizeof(*tmp102), GFP_KERNEL);
+	if (!tmp102)
+		return -ENOMEM;
+
+	i2c_set_clientdata(client, tmp102);
+	tmp102->client = client;
+
+	status = i2c_smbus_read_word_swapped(client, TMP102_CONF_REG);
+	if (status < 0) {
+		dev_err(dev, "error reading config register\n");
+		return status;
+	}
+	tmp102->config_orig = status;
+	status = i2c_smbus_write_word_swapped(client, TMP102_CONF_REG,
+					      TMP102_CONFIG);
+	if (status < 0) {
+		dev_err(dev, "error writing config register\n");
+		goto fail_restore_config;
+	}
+	status = i2c_smbus_read_word_swapped(client, TMP102_CONF_REG);
+	if (status < 0) {
+		dev_err(dev, "error reading config register\n");
+		goto fail_restore_config;
+	}
+	status &= ~TMP102_CONFIG_RD_ONLY;
+	if (status != TMP102_CONFIG) {
+		dev_err(dev, "config settings did not stick\n");
+		status = -ENODEV;
+		goto fail_restore_config;
+	}
+	tmp102->last_update = jiffies - HZ;
+	mutex_init(&tmp102->lock);
+
+	hwmon_dev = hwmon_device_register_with_groups(dev, client->name,
+						      tmp102, tmp102_groups);
+	if (IS_ERR(hwmon_dev)) {
+		dev_dbg(dev, "unable to register hwmon device\n");
+		status = PTR_ERR(hwmon_dev);
+		goto fail_restore_config;
+	}
+	tmp102->hwmon_dev = hwmon_dev;
+	tmp102->tz = thermal_zone_of_sensor_register(hwmon_dev, 0, hwmon_dev,
+						     &tmp102_of_thermal_ops);
+	if (IS_ERR(tmp102->tz))
+		tmp102->tz = NULL;
+
+	dev_info(dev, "initialized\n");
+
+	return 0;
+
+fail_restore_config:
+	i2c_smbus_write_word_swapped(client, TMP102_CONF_REG,
+				     tmp102->config_orig);
+	return status;
+}
+
+static int tmp102_remove(struct i2c_client *client)
+{
+	struct tmp102 *tmp102 = i2c_get_clientdata(client);
+
+	thermal_zone_of_sensor_unregister(tmp102->hwmon_dev, tmp102->tz);
+	hwmon_device_unregister(tmp102->hwmon_dev);
+
+	/* Stop monitoring if device was stopped originally */
+	if (tmp102->config_orig & TMP102_CONF_SD) {
+		int config;
+
+		config = i2c_smbus_read_word_swapped(client, TMP102_CONF_REG);
+		if (config >= 0)
+			i2c_smbus_write_word_swapped(client, TMP102_CONF_REG,
+						     config | TMP102_CONF_SD);
+	}
+
+	return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int tmp102_suspend(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	int config;
+
+	config = i2c_smbus_read_word_swapped(client, TMP102_CONF_REG);
+	if (config < 0)
+		return config;
+
+	config |= TMP102_CONF_SD;
+	return i2c_smbus_write_word_swapped(client, TMP102_CONF_REG, config);
+}
+
+static int tmp102_resume(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	int config;
+
+	config = i2c_smbus_read_word_swapped(client, TMP102_CONF_REG);
+	if (config < 0)
+		return config;
+
+	config &= ~TMP102_CONF_SD;
+	return i2c_smbus_write_word_swapped(client, TMP102_CONF_REG, config);
+}
+#endif /* CONFIG_PM */
+
+static SIMPLE_DEV_PM_OPS(tmp102_dev_pm_ops, tmp102_suspend, tmp102_resume);
+
+static const struct i2c_device_id tmp102_id[] = {
+	{ "tmp102", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, tmp102_id);
+
+static struct i2c_driver tmp102_driver = {
+	.driver.name	= DRIVER_NAME,
+	.driver.pm	= &tmp102_dev_pm_ops,
+	.probe		= tmp102_probe,
+	.remove		= tmp102_remove,
+	.id_table	= tmp102_id,
+};
+
+module_i2c_driver(tmp102_driver);
+
+MODULE_AUTHOR("Steven King <sfking@fdwdc.com>");
+MODULE_DESCRIPTION("Texas Instruments TMP102 temperature sensor driver");
+MODULE_LICENSE("GPL");