[lm-sensors] PATCH: hwmon-new-driver-ti-tmp401.patch

[Hans de Goede <j.w.r.degoede@hhs.nl>]

[-- Attachment #1: Type: text/plain, Size: 384 bytes --]

Hi All,

This is a new hwmon driver for TI's TMP401 temperature sensor IC. This driver
was written on behalf of an embedded systems vendor under the
linuxdriverproject.

It has been tested using a TI TMP401 sample attached to a i2c-tiny-usb adapter.
Which was provided by Till Harbaum, many thanks to him for this!

Signed-off-by: Hans de Goede <j.w.r.degoede@hhs.nl>

Regards,

Hans

[-- Attachment #2: hwmon-new-driver-ti-tmp401.patch --]
[-- Type: text/plain, Size: 18271 bytes --]

This is a new hwmon driver for TI's TMP401 temperature sensor IC. This driver
was written on behalf of an embedded systems vendor under the
linuxdriverproject.

It has been tested using a TI TMP401 sample attached to a i2c-tiny-usb adapter.
Which was provided by Till Harbaum, many thanks to him for this! 

Signed-off-by: Hans de Goede <j.w.r.degoede@hhs.nl>
diff -up vanilla-2.6.26-rc5-git2/drivers/hwmon/Kconfig~ vanilla-2.6.26-rc5-git2/drivers/hwmon/Kconfig
--- vanilla-2.6.26-rc5-git2/drivers/hwmon/Kconfig~	2008-06-14 16:51:14.000000000 +0200
+++ vanilla-2.6.26-rc5-git2/drivers/hwmon/Kconfig	2008-06-14 16:51:14.000000000 +0200
@@ -633,6 +633,16 @@ config SENSORS_THMC50
 	  This driver can also be built as a module.  If so, the module
 	  will be called thmc50.
 
+config SENSORS_TMP401
+	tristate "Texas Instruments TMP401"
+	depends on I2C && EXPERIMENTAL
+	help
+	  If you say yes here you get support for Texas Instruments TMP401
+	  temperature sensor chips.
+
+	  This driver can also be built as a module.  If so, the module
+	  will be called tmp401.
+
 config SENSORS_VIA686A
 	tristate "VIA686A"
 	depends on PCI
diff -up vanilla-2.6.26-rc5-git2/drivers/hwmon/Makefile~ vanilla-2.6.26-rc5-git2/drivers/hwmon/Makefile
--- vanilla-2.6.26-rc5-git2/drivers/hwmon/Makefile~	2008-06-14 16:52:19.000000000 +0200
+++ vanilla-2.6.26-rc5-git2/drivers/hwmon/Makefile	2008-06-14 16:52:19.000000000 +0200
@@ -66,6 +66,7 @@ obj-$(CONFIG_SENSORS_SMSC47B397)+= smsc4
 obj-$(CONFIG_SENSORS_SMSC47M1)	+= smsc47m1.o
 obj-$(CONFIG_SENSORS_SMSC47M192)+= smsc47m192.o
 obj-$(CONFIG_SENSORS_THMC50)	+= thmc50.o
+obj-$(CONFIG_SENSORS_TMP401)	+= tmp401.o
 obj-$(CONFIG_SENSORS_VIA686A)	+= via686a.o
 obj-$(CONFIG_SENSORS_VT1211)	+= vt1211.o
 obj-$(CONFIG_SENSORS_VT8231)	+= vt8231.o
diff -up vanilla-2.6.26-rc5-git2/drivers/hwmon/tmp401.c~ vanilla-2.6.26-rc5-git2/drivers/hwmon/tmp401.c
--- vanilla-2.6.26-rc5-git2/drivers/hwmon/tmp401.c~	2008-06-14 17:04:10.000000000 +0200
+++ vanilla-2.6.26-rc5-git2/drivers/hwmon/tmp401.c	2008-06-14 17:10:13.000000000 +0200
@@ -0,0 +1,566 @@
+/* tmp401.c
+ *
+ * Copyright (C) 2007 Hans de Goede <j.w.r.degoede@hhs.nl>
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/*
+ * Driver for the Texas Instruments TMP401 SMBUS temperature sensor IC.
+ *
+ * Note this IC is in some aspect similar to the lm90, but it has quite a
+ * few differences too, for example the local temp has a higher resolution
+ * and thus has 16 bits registers for its value and limit instead of 8 bits.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/jiffies.h>
+#include <linux/i2c.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+#include <linux/sysfs.h>
+
+/* Addresses to scan */
+static unsigned short normal_i2c[] = { 0x4c, I2C_CLIENT_END };
+
+/* Insmod parameters */
+I2C_CLIENT_INSMOD_1(tmp401);
+
+
+/*
+ * The TMP401 registers, note some registers have different addresses for
+ * reading and writing
+ */
+#define TMP401_STATUS				0x02
+#define TMP401_CONFIG_READ			0x03
+#define TMP401_CONFIG_WRITE			0x09
+#define TMP401_CONVERSION_RATE_READ		0x04
+#define TMP401_CONVERSION_RATE_WRITE		0x0A
+#define TMP401_ONE_SHOT_START_WRITE		0x0F
+#define TMP401_RESOLUTION			0x1A
+#define TMP401_TEMP_CRIT_HYST			0x21
+#define TMP401_CONSECUTIVE_ALERT		0x22
+#define TMP401_MANUFACTURER_ID_REG		0xFE
+#define TMP401_DEVICE_ID_REG			0xFF
+
+static const u8 TMP401_TEMP_MSB[2]			= { 0x00, 0x01 };
+static const u8 TMP401_TEMP_LSB[2]			= { 0x15, 0x10 };
+static const u8 TMP401_TEMP_LOW_LIMIT_MSB_READ[2]	= { 0x06, 0x08 };
+static const u8 TMP401_TEMP_LOW_LIMIT_MSB_WRITE[2]	= { 0x0C, 0x0E };
+static const u8 TMP401_TEMP_LOW_LIMIT_LSB[2]		= { 0x17, 0x14 };
+static const u8 TMP401_TEMP_HIGH_LIMIT_MSB_READ[2]	= { 0x05, 0x07 };
+static const u8 TMP401_TEMP_HIGH_LIMIT_MSB_WRITE[2]	= { 0x0B, 0x0D };
+static const u8 TMP401_TEMP_HIGH_LIMIT_LSB[2]		= { 0x16, 0x13 };
+/* These are called the THERM limit / hysteresis / mask in the datasheets */
+static const u8 TMP401_TEMP_CRIT_LIMIT[2]		= { 0x20, 0x19 };
+
+/* Bit masks */
+#define TMP401_CONFIG_RANGE_MASK		0x04
+#define TMP401_CONFIG_SHUTDOWN_MASK		0x40
+#define TMP401_STATUS_LOCAL_CRIT_MASK		0x01
+#define TMP401_STATUS_REMOTE_CRIT_MASK		0x02
+#define TMP401_STATUS_REMOTE_OPEN_MASK		0x04
+#define TMP401_STATUS_REMOTE_LOW_MASK		0x08
+#define TMP401_STATUS_REMOTE_HIGH_MASK		0x10
+#define TMP401_STATUS_LOCAL_LOW_MASK		0x20
+#define TMP401_STATUS_LOCAL_HIGH_MASK		0x40
+
+/* Manufacturer / Device ID's */
+#define TMP401_MANUFACTURER_ID			0x55
+#define TMP401_DEVICE_ID			0x11
+
+/* our driver name */
+#define TMP401_NAME "tmp401"
+
+/*
+ * Functions declarations
+ */
+
+static void tmp401_init_client(struct i2c_client *client);
+static int tmp401_attach_adapter(struct i2c_adapter *adapter);
+static int tmp401_detach_client(struct i2c_client *client);
+static struct tmp401_data *tmp401_update_device(struct device *dev);
+
+/*
+ * Driver data (common to all clients)
+ */
+
+static struct i2c_driver tmp401_driver = {
+	.driver = {
+		.name	= TMP401_NAME,
+	},
+	.attach_adapter	= tmp401_attach_adapter,
+	.detach_client	= tmp401_detach_client,
+};
+
+/*
+ * Client data (each client gets its own)
+ */
+
+struct tmp401_data {
+	struct i2c_client client;
+	struct device *hwmon_dev;
+	struct mutex update_lock;
+	char valid; /* zero until following fields are valid */
+	unsigned long last_updated; /* in jiffies */
+
+	/* register values */
+	u8 status;
+	u8 config;
+	u16 temp[2];
+	u16 temp_low[2];
+	u16 temp_high[2];
+	u8 temp_crit[2];
+	u8 temp_crit_hyst;
+};
+
+/*
+ * Sysfs attr show / store functions
+ */
+
+static int tmp401_register_to_temp(u16 reg, u8 config)
+{
+	int temp = reg;
+
+	if (config & TMP401_CONFIG_RANGE_MASK)
+		temp -= 64 * 256;
+
+	return (temp * 625) / 160;
+}
+
+static u16 tmp401_temp_to_register(long temp, u8 config)
+{
+	if (config & TMP401_CONFIG_RANGE_MASK) {
+		temp = SENSORS_LIMIT(temp, -64000, 191000);
+		temp += 64000;
+	} else
+		temp = SENSORS_LIMIT(temp, 0, 127000);
+
+	return (temp * 160) / 625;
+}
+
+static int tmp401_crit_register_to_temp(u8 reg, u8 config)
+{
+	int temp = reg;
+
+	if (config & TMP401_CONFIG_RANGE_MASK)
+		temp -= 64;
+
+	return temp * 1000;
+}
+
+static u8 tmp401_temp_crit_to_register(long temp, u8 config)
+{
+	if (config & TMP401_CONFIG_RANGE_MASK) {
+		temp = SENSORS_LIMIT(temp, -64000, 191000);
+		temp += 64000;
+	} else
+		temp = SENSORS_LIMIT(temp, 0, 127000);
+
+	return temp / 1000;
+}
+
+static ssize_t show_temp_value(struct device *dev,
+	struct device_attribute *devattr, char *buf)
+{
+	int index = to_sensor_dev_attr(devattr)->index;
+	struct tmp401_data *data = tmp401_update_device(dev);
+
+	return sprintf(buf, "%d\n",
+		tmp401_register_to_temp(data->temp[index], data->config));
+}
+
+static ssize_t show_temp_min(struct device *dev,
+	struct device_attribute *devattr, char *buf)
+{
+	int index = to_sensor_dev_attr(devattr)->index;
+	struct tmp401_data *data = tmp401_update_device(dev);
+
+	return sprintf(buf, "%d\n",
+		tmp401_register_to_temp(data->temp_low[index], data->config));
+}
+
+static ssize_t show_temp_max(struct device *dev,
+	struct device_attribute *devattr, char *buf)
+{
+	int index = to_sensor_dev_attr(devattr)->index;
+	struct tmp401_data *data = tmp401_update_device(dev);
+
+	return sprintf(buf, "%d\n",
+		tmp401_register_to_temp(data->temp_high[index], data->config));
+}
+
+static ssize_t show_temp_crit(struct device *dev,
+	struct device_attribute *devattr, char *buf)
+{
+	int index = to_sensor_dev_attr(devattr)->index;
+	struct tmp401_data *data = tmp401_update_device(dev);
+
+	return sprintf(buf, "%d\n",
+			tmp401_crit_register_to_temp(data->temp_crit[index],
+							data->config));
+}
+
+static ssize_t show_temp_crit_hyst(struct device *dev,
+	struct device_attribute *devattr, char *buf)
+{
+	int temp, index = to_sensor_dev_attr(devattr)->index;
+	struct tmp401_data *data = tmp401_update_device(dev);
+
+	mutex_lock(&data->update_lock);
+	temp = tmp401_crit_register_to_temp(data->temp_crit[index],
+						data->config);
+	temp -= data->temp_crit_hyst * 1000;
+	mutex_unlock(&data->update_lock);
+
+	return sprintf(buf, "%d\n", temp);
+}
+
+static ssize_t show_status(struct device *dev,
+	struct device_attribute *devattr, char *buf)
+{
+	int mask = to_sensor_dev_attr(devattr)->index;
+	struct tmp401_data *data = tmp401_update_device(dev);
+
+	if (data->status & mask)
+		return sprintf(buf, "1\n");
+	else
+		return sprintf(buf, "0\n");
+}
+
+static ssize_t store_temp_min(struct device *dev, struct device_attribute
+	*devattr, const char *buf, size_t count)
+{
+	int index = to_sensor_dev_attr(devattr)->index;
+	struct tmp401_data *data = tmp401_update_device(dev);
+	long v;
+	u16 reg;
+
+	if (strict_strtol(buf, 10, &v))
+		return -EINVAL;
+
+	reg = tmp401_temp_to_register(v, data->config);
+
+	mutex_lock(&data->update_lock);
+
+	i2c_smbus_write_byte_data(&data->client,
+		TMP401_TEMP_LOW_LIMIT_MSB_WRITE[index], reg >> 8);
+	i2c_smbus_write_byte_data(&data->client,
+		TMP401_TEMP_LOW_LIMIT_LSB[index], reg & 0xFF);
+
+	data->temp_low[index] = reg;
+
+	mutex_unlock(&data->update_lock);
+
+	return count;
+}
+
+static ssize_t store_temp_max(struct device *dev, struct device_attribute
+	*devattr, const char *buf, size_t count)
+{
+	int index = to_sensor_dev_attr(devattr)->index;
+	struct tmp401_data *data = tmp401_update_device(dev);
+	long v;
+	u16 reg;
+
+	if (strict_strtol(buf, 10, &v))
+		return -EINVAL;
+
+	reg = tmp401_temp_to_register(v, data->config);
+
+	mutex_lock(&data->update_lock);
+
+	i2c_smbus_write_byte_data(&data->client,
+		TMP401_TEMP_HIGH_LIMIT_MSB_WRITE[index], reg >> 8);
+	i2c_smbus_write_byte_data(&data->client,
+		TMP401_TEMP_HIGH_LIMIT_LSB[index], reg & 0xFF);
+
+	data->temp_high[index] = reg;
+
+	mutex_unlock(&data->update_lock);
+
+	return count;
+}
+
+static ssize_t store_temp_crit(struct device *dev, struct device_attribute
+	*devattr, const char *buf, size_t count)
+{
+	int index = to_sensor_dev_attr(devattr)->index;
+	struct tmp401_data *data = tmp401_update_device(dev);
+	long v;
+	u8 reg;
+
+	if (strict_strtol(buf, 10, &v))
+		return -EINVAL;
+
+	reg = tmp401_temp_crit_to_register(v, data->config);
+
+	mutex_lock(&data->update_lock);
+
+	i2c_smbus_write_byte_data(&data->client,
+		TMP401_TEMP_CRIT_LIMIT[index], reg);
+
+	data->temp_crit[index] = reg;
+
+	mutex_unlock(&data->update_lock);
+
+	return count;
+}
+
+static ssize_t store_temp_crit_hyst(struct device *dev, struct device_attribute
+	*devattr, const char *buf, size_t count)
+{
+	int temp, index = to_sensor_dev_attr(devattr)->index;
+	struct tmp401_data *data = tmp401_update_device(dev);
+	long v;
+	u8 reg;
+
+	if (strict_strtol(buf, 10, &v))
+		return -EINVAL;
+
+	if (data->config & TMP401_CONFIG_RANGE_MASK)
+		v = SENSORS_LIMIT(v, -64000, 191000);
+	else
+		v = SENSORS_LIMIT(v, 0, 127000);
+
+	mutex_lock(&data->update_lock);
+	temp = tmp401_crit_register_to_temp(data->temp_crit[index],
+						data->config);
+	v = SENSORS_LIMIT(v, temp - 255000, temp);
+	reg = (temp - v) / 1000;
+
+	i2c_smbus_write_byte_data(&data->client,
+		TMP401_TEMP_CRIT_HYST, reg);
+
+	data->temp_crit_hyst = reg;
+
+	mutex_unlock(&data->update_lock);
+
+	return count;
+}
+
+static struct sensor_device_attribute tmp401_attr[] = {
+	SENSOR_ATTR(temp1_input, 0444, show_temp_value, NULL, 0),
+	SENSOR_ATTR(temp1_min, 0644, show_temp_min, store_temp_min, 0),
+	SENSOR_ATTR(temp1_max, 0644, show_temp_max, store_temp_max, 0),
+	SENSOR_ATTR(temp1_crit, 0644, show_temp_crit, store_temp_crit, 0),
+	SENSOR_ATTR(temp1_crit_hyst, 0644, show_temp_crit_hyst,
+			store_temp_crit_hyst, 0),
+	SENSOR_ATTR(temp1_min_alarm, 0444, show_status, NULL,
+			TMP401_STATUS_LOCAL_LOW_MASK),
+	SENSOR_ATTR(temp1_max_alarm, 0444, show_status, NULL,
+			TMP401_STATUS_LOCAL_HIGH_MASK),
+	SENSOR_ATTR(temp1_crit_alarm, 0444, show_status, NULL,
+			TMP401_STATUS_LOCAL_CRIT_MASK),
+	SENSOR_ATTR(temp2_input, 0444, show_temp_value, NULL, 1),
+	SENSOR_ATTR(temp2_min, 0644, show_temp_min, store_temp_min, 1),
+	SENSOR_ATTR(temp2_max, 0644, show_temp_max, store_temp_max, 1),
+	SENSOR_ATTR(temp2_crit, 0644, show_temp_crit, store_temp_crit, 1),
+	SENSOR_ATTR(temp2_crit_hyst, 0444, show_temp_crit_hyst, NULL, 1),
+	SENSOR_ATTR(temp2_fault, 0444, show_status, NULL,
+			TMP401_STATUS_REMOTE_OPEN_MASK),
+	SENSOR_ATTR(temp2_min_alarm, 0444, show_status, NULL,
+			TMP401_STATUS_REMOTE_LOW_MASK),
+	SENSOR_ATTR(temp2_max_alarm, 0444, show_status, NULL,
+			TMP401_STATUS_REMOTE_HIGH_MASK),
+	SENSOR_ATTR(temp2_crit_alarm, 0444, show_status, NULL,
+			TMP401_STATUS_REMOTE_CRIT_MASK),
+};
+
+/*
+ * Real code
+ */
+
+static int tmp401_detect(struct i2c_adapter *adapter, int address, int kind)
+{
+	int i, err = 0;
+	struct i2c_client *client;
+	struct tmp401_data *data;
+
+	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+		return 0;
+
+	/* OK. For now, we presume we have a valid client. We now create the
+	 * client structure, even though we cannot fill it completely yet.
+	 * But it allows us to access i2c_smbus_read_byte_data. */
+	if (!(data = kzalloc(sizeof(struct tmp401_data), GFP_KERNEL)))
+		return -ENOMEM;
+
+	client = &data->client;
+	i2c_set_clientdata(client, data);
+	client->addr = address;
+	client->adapter = adapter;
+	client->driver = &tmp401_driver;
+	mutex_init(&data->update_lock);
+
+	/* Detect & Identify the chip */
+	if (kind <= 0) {
+		u8 manufacturer_id;
+		u8 device_id;
+
+		manufacturer_id = i2c_smbus_read_byte_data(client,
+						TMP401_MANUFACTURER_ID_REG);
+		device_id = i2c_smbus_read_byte_data(client,
+						TMP401_DEVICE_ID_REG);
+
+		if (manufacturer_id != TMP401_MANUFACTURER_ID ||
+				device_id != TMP401_DEVICE_ID)
+			goto exit_free;
+	}
+
+	/* Tell the I2C layer a new client has arrived */
+	if ((err = i2c_attach_client(client)))
+		goto exit_free;
+
+	/* Initialize the TMP401 chip */
+	tmp401_init_client(client);
+
+	/* Register sysfs hooks */
+	for (i = 0; i < ARRAY_SIZE(tmp401_attr); i++) {
+		err = device_create_file(&client->dev,
+					&tmp401_attr[i].dev_attr);
+		if (err)
+			goto exit_detach;
+	}
+
+	data->hwmon_dev = hwmon_device_register(&client->dev);
+	if (IS_ERR(data->hwmon_dev)) {
+		err = PTR_ERR(data->hwmon_dev);
+		data->hwmon_dev = NULL;
+		goto exit_detach;
+	}
+
+	printk(KERN_INFO TMP401_NAME ": Detected TI TMP401 chip\n");
+
+	return 0;
+
+exit_detach:
+	tmp401_detach_client(client); /* will also free data for us */
+	return err;
+
+exit_free:
+	kfree(data);
+	return err;
+}
+
+static void tmp401_init_client(struct i2c_client *client)
+{
+	int config, config_orig;
+
+	/* Set the conversion rate to 2 Hz */
+	i2c_smbus_write_byte_data(client, TMP401_CONVERSION_RATE_WRITE, 5);
+
+	/* Start conversions (disable shutdown if necessary) */
+	config = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ);
+	if (config < 0) {
+		dev_warn(&client->dev, "Initialization failed!\n");
+		return;
+	}
+
+	config_orig = config;
+	config &= ~TMP401_CONFIG_SHUTDOWN_MASK;
+
+	if (config != config_orig)
+		i2c_smbus_write_byte_data(client, TMP401_CONFIG_WRITE, config);
+}
+
+static int tmp401_attach_adapter(struct i2c_adapter *adapter)
+{
+	if (!(adapter->class & I2C_CLASS_HWMON))
+		return 0;
+	return i2c_probe(adapter, &addr_data, tmp401_detect);
+}
+
+static int tmp401_detach_client(struct i2c_client *client)
+{
+	struct tmp401_data *data = i2c_get_clientdata(client);
+	int i, err;
+
+	/* Check if registered in case we're called from tmp401_detect
+	   to cleanup after an error */
+	if (data->hwmon_dev)
+		hwmon_device_unregister(data->hwmon_dev);
+
+	for (i = 0; i < ARRAY_SIZE(tmp401_attr); i++)
+		device_remove_file(&client->dev, &tmp401_attr[i].dev_attr);
+
+	if ((err = i2c_detach_client(client)))
+		return err;
+
+	kfree(data);
+	return 0;
+}
+
+static struct tmp401_data *tmp401_update_device(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct tmp401_data *data = i2c_get_clientdata(client);
+	int i;
+
+	mutex_lock(&data->update_lock);
+
+	if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
+		data->status = i2c_smbus_read_byte_data(client, TMP401_STATUS);
+		data->config = i2c_smbus_read_byte_data(client,
+						TMP401_CONFIG_READ);
+		for (i = 0; i < 2; i++) {
+			data->temp[i] = i2c_smbus_read_byte_data(client,
+						TMP401_TEMP_MSB[i]) << 8;
+			data->temp[i] |= i2c_smbus_read_byte_data(client,
+						TMP401_TEMP_LSB[i]);
+			data->temp_low[i] = i2c_smbus_read_byte_data(client,
+				TMP401_TEMP_LOW_LIMIT_MSB_READ[i]) << 8;
+			data->temp_low[i] |= i2c_smbus_read_byte_data(client,
+						TMP401_TEMP_LOW_LIMIT_LSB[i]);
+			data->temp_high[i] = i2c_smbus_read_byte_data(client,
+				TMP401_TEMP_HIGH_LIMIT_MSB_READ[i]) << 8;
+			data->temp_high[i] |= i2c_smbus_read_byte_data(client,
+						TMP401_TEMP_HIGH_LIMIT_LSB[i]);
+			data->temp_crit[i] = i2c_smbus_read_byte_data(client,
+						TMP401_TEMP_CRIT_LIMIT[i]);
+		}
+
+		data->temp_crit_hyst = i2c_smbus_read_byte_data(client,
+						TMP401_TEMP_CRIT_HYST);
+
+		data->last_updated = jiffies;
+		data->valid = 1;
+	}
+
+	mutex_unlock(&data->update_lock);
+
+	return data;
+}
+
+static int __init tmp401_init(void)
+{
+	return i2c_add_driver(&tmp401_driver);
+}
+
+static void __exit tmp401_exit(void)
+{
+	i2c_del_driver(&tmp401_driver);
+}
+
+MODULE_AUTHOR("Hans de Goede <j.w.r.degoede@hhs.nl>");
+MODULE_DESCRIPTION("Texas Instruments TMP401 temperature sensor driver");
+MODULE_LICENSE("GPL");
+
+module_init(tmp401_init);
+module_exit(tmp401_exit);

[-- Attachment #3: Type: text/plain, Size: 153 bytes --]

_______________________________________________
lm-sensors mailing list
lm-sensors@lm-sensors.org
http://lists.lm-sensors.org/mailman/listinfo/lm-sensors