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/*

 * lm63.c - driver for the National Semiconductor LM63 temperature sensor

 *          with integrated fan control

 * Copyright (C) 2004-2006  Jean Delvare <khali@linux-fr.org>

 * Based on the lm90 driver.

 *

 * The LM63 is a sensor chip made by National Semiconductor. It measures

 * two temperatures (its own and one external one) and the speed of one

 * fan, those speed it can additionally control. Complete datasheet can be

 * obtained from National's website at:

 *   http://www.national.com/pf/LM/LM63.html

 *

 * The LM63 is basically an LM86 with fan speed monitoring and control

 * capabilities added. It misses some of the LM86 features though:

 *  - No low limit for local temperature.

 *  - No critical limit for local temperature.

 *  - Critical limit for remote temperature can be changed only once. We

 *    will consider that the critical limit is read-only.

 *

 * The datasheet isn't very clear about what the tachometer reading is.

 * I had a explanation from National Semiconductor though. The two lower

 * bits of the read value have to be masked out. The value is still 16 bit

 * in width.

 *

 * 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.

 */

#include <linux/module.h>

#include <linux/init.h>

#include <linux/slab.h>

#include <linux/jiffies.h>

#include <linux/i2c.h>

#include <linux/hwmon-sysfs.h>

#include <linux/hwmon.h>

#include <linux/err.h>

#include <linux/mutex.h>

#include <linux/sysfs.h>

/*

 * Addresses to scan

 * Address is fully defined internally and cannot be changed.

 */

static unsigned short normal_i2c[] = { 0x4c, I2C_CLIENT_END };

/*

 * Insmod parameters

 */

I2C_CLIENT_INSMOD_1(lm63);

/*

 * The LM63 registers

 */

#define LM63_REG_CONFIG1                0x03

#define LM63_REG_CONFIG2                0xBF

#define LM63_REG_CONFIG_FAN             0x4A

#define LM63_REG_TACH_COUNT_MSB         0x47

#define LM63_REG_TACH_COUNT_LSB         0x46

#define LM63_REG_TACH_LIMIT_MSB         0x49

#define LM63_REG_TACH_LIMIT_LSB         0x48

#define LM63_REG_PWM_VALUE              0x4C

#define LM63_REG_PWM_FREQ               0x4D

#define LM63_REG_LOCAL_TEMP             0x00

#define LM63_REG_LOCAL_HIGH             0x05

#define LM63_REG_REMOTE_TEMP_MSB        0x01

#define LM63_REG_REMOTE_TEMP_LSB        0x10

#define LM63_REG_REMOTE_OFFSET_MSB      0x11

#define LM63_REG_REMOTE_OFFSET_LSB      0x12

#define LM63_REG_REMOTE_HIGH_MSB        0x07

#define LM63_REG_REMOTE_HIGH_LSB        0x13

#define LM63_REG_REMOTE_LOW_MSB         0x08

#define LM63_REG_REMOTE_LOW_LSB         0x14

#define LM63_REG_REMOTE_TCRIT           0x19

#define LM63_REG_REMOTE_TCRIT_HYST      0x21

#define LM63_REG_ALERT_STATUS           0x02

#define LM63_REG_ALERT_MASK             0x16

#define LM63_REG_MAN_ID                 0xFE

#define LM63_REG_CHIP_ID                0xFF

/*

 * Conversions and various macros

 * For tachometer counts, the LM63 uses 16-bit values.

 * For local temperature and high limit, remote critical limit and hysteresis

 * value, it uses signed 8-bit values with LSB = 1 degree Celsius.

 * For remote temperature, low and high limits, it uses signed 11-bit values

 * with LSB = 0.125 degree Celsius, left-justified in 16-bit registers.

 */

#define FAN_FROM_REG(reg)       ((reg) == 0xFFFC || (reg) == 0 ? 0 : \

                                 5400000 / (reg))

#define FAN_TO_REG(val)         ((val) <= 82 ? 0xFFFC : \

                                 (5400000 / (val)) & 0xFFFC)

#define TEMP8_FROM_REG(reg)     ((reg) * 1000)

#define TEMP8_TO_REG(val)       ((val) <= -128000 ? -128 : \

                                 (val) >= 127000 ? 127 : \

                                 (val) < 0 ? ((val) - 500) / 1000 : \

                                 ((val) + 500) / 1000)

#define TEMP11_FROM_REG(reg)    ((reg) / 32 * 125)

#define TEMP11_TO_REG(val)      ((val) <= -128000 ? 0x8000 : \

                                 (val) >= 127875 ? 0x7FE0 : \

                                 (val) < 0 ? ((val) - 62) / 125 * 32 : \

                                 ((val) + 62) / 125 * 32)

#define HYST_TO_REG(val)        ((val) <= 0 ? 0 : \

                                 (val) >= 127000 ? 127 : \

                                 ((val) + 500) / 1000)

/*

 * Functions declaration

 */

static int lm63_attach_adapter(struct i2c_adapter *adapter);

static int lm63_detach_client(struct i2c_client *client);

static struct lm63_data *lm63_update_device(struct device *dev);

static int lm63_detect(struct i2c_adapter *adapter, int address, int kind);

static void lm63_init_client(struct i2c_client *client);

/*

 * Driver data (common to all clients)

 */

static struct i2c_driver lm63_driver = {

        .driver = {

                .name   = "lm63",

        },

        .attach_adapter = lm63_attach_adapter,

        .detach_client  = lm63_detach_client,

};

/*

 * Client data (each client gets its own)

 */

struct lm63_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 */

        /* registers values */

        u8 config, config_fan;

        u16 fan[2];     /* 0: input

                           1: low limit */

        u8 pwm1_freq;

        u8 pwm1_value;

        s8 temp8[3];    /* 0: local input

                           1: local high limit

                           2: remote critical limit */

        s16 temp11[3];  /* 0: remote input

                           1: remote low limit

                           2: remote high limit */

        u8 temp2_crit_hyst;

        u8 alarms;

};

/*

 * Sysfs callback functions and files

 */

static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,

                        char *buf)

{

        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);

        struct lm63_data *data = lm63_update_device(dev);

        return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index]));

}

static ssize_t set_fan(struct device *dev, struct device_attribute *dummy,

                       const char *buf, size_t count)

{

        struct i2c_client *client = to_i2c_client(dev);

        struct lm63_data *data = i2c_get_clientdata(client);

        unsigned long val = simple_strtoul(buf, NULL, 10);

        mutex_lock(&data->update_lock);

        data->fan[1] = FAN_TO_REG(val);

        i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB,

                                  data->fan[1] & 0xFF);

        i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB,

                                  data->fan[1] >> 8);

        mutex_unlock(&data->update_lock);

        return count;

}

static ssize_t show_pwm1(struct device *dev, struct device_attribute *dummy,

                         char *buf)

{

        struct lm63_data *data = lm63_update_device(dev);

        return sprintf(buf, "%d\n", data->pwm1_value >= 2 * data->pwm1_freq ?

                       255 : (data->pwm1_value * 255 + data->pwm1_freq) /

                       (2 * data->pwm1_freq));

}

static ssize_t set_pwm1(struct device *dev, struct device_attribute *dummy,

                        const char *buf, size_t count)

{

        struct i2c_client *client = to_i2c_client(dev);

        struct lm63_data *data = i2c_get_clientdata(client);

        unsigned long val;

        if (!(data->config_fan & 0x20)) /* register is read-only */

                return -EPERM;

        val = simple_strtoul(buf, NULL, 10);

        mutex_lock(&data->update_lock);

        data->pwm1_value = val <= 0 ? 0 :

                           val >= 255 ? 2 * data->pwm1_freq :

                           (val * data->pwm1_freq * 2 + 127) / 255;

        i2c_smbus_write_byte_data(client, LM63_REG_PWM_VALUE, data->pwm1_value);

        mutex_unlock(&data->update_lock);

        return count;

}

static ssize_t show_pwm1_enable(struct device *dev, struct device_attribute *dummy,

                                char *buf)

{

        struct lm63_data *data = lm63_update_device(dev);

        return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2);

}

static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr,

                          char *buf)

{

        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);

        struct lm63_data *data = lm63_update_device(dev);

        return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index]));

}

static ssize_t set_temp8(struct device *dev, struct device_attribute *dummy,

                         const char *buf, size_t count)

{

        struct i2c_client *client = to_i2c_client(dev);

        struct lm63_data *data = i2c_get_clientdata(client);

        long val = simple_strtol(buf, NULL, 10);

        mutex_lock(&data->update_lock);

        data->temp8[1] = TEMP8_TO_REG(val);

        i2c_smbus_write_byte_data(client, LM63_REG_LOCAL_HIGH, data->temp8[1]);

        mutex_unlock(&data->update_lock);

        return count;

}

static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,

                           char *buf)

{

        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);

        struct lm63_data *data = lm63_update_device(dev);

        return sprintf(buf, "%d\n", TEMP11_FROM_REG(data->temp11[attr->index]));

}

static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,

                          const char *buf, size_t count)

{

        static const u8 reg[4] = {

                LM63_REG_REMOTE_LOW_MSB,

                LM63_REG_REMOTE_LOW_LSB,

                LM63_REG_REMOTE_HIGH_MSB,

                LM63_REG_REMOTE_HIGH_LSB,

        };

        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);

        struct i2c_client *client = to_i2c_client(dev);

        struct lm63_data *data = i2c_get_clientdata(client);

        long val = simple_strtol(buf, NULL, 10);

        int nr = attr->index;

        mutex_lock(&data->update_lock);

        data->temp11[nr] = TEMP11_TO_REG(val);

        i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2],

                                  data->temp11[nr] >> 8);

        i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1],

                                  data->temp11[nr] & 0xff);

        mutex_unlock(&data->update_lock);

        return count;

}

/* Hysteresis register holds a relative value, while we want to present

   an absolute to user-space */

static ssize_t show_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy,

                                    char *buf)

{

        struct lm63_data *data = lm63_update_device(dev);

        return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[2])

                       - TEMP8_FROM_REG(data->temp2_crit_hyst));

}

/* And now the other way around, user-space provides an absolute

   hysteresis value and we have to store a relative one */

static ssize_t set_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy,

                                   const char *buf, size_t count)

{

        struct i2c_client *client = to_i2c_client(dev);

        struct lm63_data *data = i2c_get_clientdata(client);

        long val = simple_strtol(buf, NULL, 10);

        long hyst;

        mutex_lock(&data->update_lock);

        hyst = TEMP8_FROM_REG(data->temp8[2]) - val;

        i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST,

                                  HYST_TO_REG(hyst));

        mutex_unlock(&data->update_lock);

        return count;

}

static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy,

                           char *buf)

{

        struct lm63_data *data = lm63_update_device(dev);

        return sprintf(buf, "%u\n", data->alarms);

}

static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr,

                          char *buf)

{

        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);

        struct lm63_data *data = lm63_update_device(dev);

        int bitnr = attr->index;

        return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);

}

static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);

static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan,

        set_fan, 1);

static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1);

static DEVICE_ATTR(pwm1_enable, S_IRUGO, show_pwm1_enable, NULL);

static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp8, NULL, 0);

static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8,

        set_temp8, 1);

static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0);

static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11,

        set_temp11, 1);

static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11,

        set_temp11, 2);

static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp8, NULL, 2);

static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp2_crit_hyst,

        set_temp2_crit_hyst);

/* Individual alarm files */

static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0);

static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1);

static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);

static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);

static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);

static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);

/* Raw alarm file for compatibility */

static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);

static struct attribute *lm63_attributes[] = {

        &dev_attr_pwm1.attr,

        &dev_attr_pwm1_enable.attr,

        &sensor_dev_attr_temp1_input.dev_attr.attr,

        &sensor_dev_attr_temp2_input.dev_attr.attr,

        &sensor_dev_attr_temp2_min.dev_attr.attr,

        &sensor_dev_attr_temp1_max.dev_attr.attr,

        &sensor_dev_attr_temp2_max.dev_attr.attr,

        &sensor_dev_attr_temp2_crit.dev_attr.attr,

        &dev_attr_temp2_crit_hyst.attr,

        &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,

        &sensor_dev_attr_temp2_fault.dev_attr.attr,

        &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,

        &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,

        &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,

        &dev_attr_alarms.attr,

        NULL

};

static const struct attribute_group lm63_group = {

        .attrs = lm63_attributes,

};

static struct attribute *lm63_attributes_fan1[] = {

        &sensor_dev_attr_fan1_input.dev_attr.attr,

        &sensor_dev_attr_fan1_min.dev_attr.attr,

        &sensor_dev_attr_fan1_min_alarm.dev_attr.attr,

        NULL

};

static const struct attribute_group lm63_group_fan1 = {

        .attrs = lm63_attributes_fan1,

};

/*

 * Real code

 */

static int lm63_attach_adapter(struct i2c_adapter *adapter)

{

        if (!(adapter->class & I2C_CLASS_HWMON))

                return 0;

        return i2c_probe(adapter, &addr_data, lm63_detect);

}

/*

 * The following function does more than just detection. If detection

 * succeeds, it also registers the new chip.

 */

static int lm63_detect(struct i2c_adapter *adapter, int address, int kind)

{

        struct i2c_client *new_client;

        struct lm63_data *data;

        int err = 0;

        if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))

                goto exit;

        if (!(data = kzalloc(sizeof(struct lm63_data), GFP_KERNEL))) {

                err = -ENOMEM;

                goto exit;

        }

        /* The common I2C client data is placed right before the

           LM63-specific data. */

        new_client = &data->client;

        i2c_set_clientdata(new_client, data);

        new_client->addr = address;

        new_client->adapter = adapter;

        new_client->driver = &lm63_driver;

        new_client->flags = 0;

        /* Default to an LM63 if forced */

        if (kind == 0)

                kind = lm63;

        if (kind < 0) { /* must identify */

                u8 man_id, chip_id, reg_config1, reg_config2;

                u8 reg_alert_status, reg_alert_mask;

                man_id = i2c_smbus_read_byte_data(new_client,

                         LM63_REG_MAN_ID);

                chip_id = i2c_smbus_read_byte_data(new_client,

                          LM63_REG_CHIP_ID);

                reg_config1 = i2c_smbus_read_byte_data(new_client,

                              LM63_REG_CONFIG1);

                reg_config2 = i2c_smbus_read_byte_data(new_client,

                              LM63_REG_CONFIG2);

                reg_alert_status = i2c_smbus_read_byte_data(new_client,

                                   LM63_REG_ALERT_STATUS);

                reg_alert_mask = i2c_smbus_read_byte_data(new_client,

                                 LM63_REG_ALERT_MASK);

                if (man_id == 0x01 /* National Semiconductor */

                 && chip_id == 0x41 /* LM63 */

                 && (reg_config1 & 0x18) == 0x00

                 && (reg_config2 & 0xF8) == 0x00

                 && (reg_alert_status & 0x20) == 0x00

                 && (reg_alert_mask & 0xA4) == 0xA4) {

                        kind = lm63;

                } else { /* failed */

                        dev_dbg(&adapter->dev, "Unsupported chip "

                                "(man_id=0x%02X, chip_id=0x%02X).\n",

                                man_id, chip_id);

                        goto exit_free;

                }

        }

        strlcpy(new_client->name, "lm63", I2C_NAME_SIZE);

        data->valid = 0;

        mutex_init(&data->update_lock);

        /* Tell the I2C layer a new client has arrived */

        if ((err = i2c_attach_client(new_client)))

                goto exit_free;

        /* Initialize the LM63 chip */

        lm63_init_client(new_client);

        /* Register sysfs hooks */

        if ((err = sysfs_create_group(&new_client->dev.kobj,

                                      &lm63_group)))

                goto exit_detach;

        if (data->config & 0x04) { /* tachometer enabled */

                if ((err = sysfs_create_group(&new_client->dev.kobj,

                                              &lm63_group_fan1)))

                        goto exit_remove_files;

        }

        data->hwmon_dev = hwmon_device_register(&new_client->dev);

        if (IS_ERR(data->hwmon_dev)) {

                err = PTR_ERR(data->hwmon_dev);

                goto exit_remove_files;

        }

        return 0;

exit_remove_files:

        sysfs_remove_group(&new_client->dev.kobj, &lm63_group);

        sysfs_remove_group(&new_client->dev.kobj, &lm63_group_fan1);

exit_detach:

        i2c_detach_client(new_client);

exit_free:

        kfree(data);

exit:

        return err;

}

/* Idealy we shouldn't have to initialize anything, since the BIOS

   should have taken care of everything */

static void lm63_init_client(struct i2c_client *client)

{

        struct lm63_data *data = i2c_get_clientdata(client);

        data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1);

        data->config_fan = i2c_smbus_read_byte_data(client,

                                                    LM63_REG_CONFIG_FAN);

        /* Start converting if needed */

        if (data->config & 0x40) { /* standby */

                dev_dbg(&client->dev, "Switching to operational mode\n");

                data->config &= 0xA7;

                i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1,

                                          data->config);

        }

        /* We may need pwm1_freq before ever updating the client data */

        data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ);

        if (data->pwm1_freq == 0)

                data->pwm1_freq = 1;

        /* Show some debug info about the LM63 configuration */

        dev_dbg(&client->dev, "Alert/tach pin configured for %s\n",

                (data->config & 0x04) ? "tachometer input" :

                "alert output");

        dev_dbg(&client->dev, "PWM clock %s kHz, output frequency %u Hz\n",

                (data->config_fan & 0x08) ? "1.4" : "360",

                ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq);

        dev_dbg(&client->dev, "PWM output active %s, %s mode\n",

                (data->config_fan & 0x10) ? "low" : "high",

                (data->config_fan & 0x20) ? "manual" : "auto");

}

static int lm63_detach_client(struct i2c_client *client)

{

        struct lm63_data *data = i2c_get_clientdata(client);

        int err;

        hwmon_device_unregister(data->hwmon_dev);

        sysfs_remove_group(&client->dev.kobj, &lm63_group);

        sysfs_remove_group(&client->dev.kobj, &lm63_group_fan1);

        if ((err = i2c_detach_client(client)))

                return err;

        kfree(data);

        return 0;

}

static struct lm63_data *lm63_update_device(struct device *dev)

{

        struct i2c_client *client = to_i2c_client(dev);

        struct lm63_data *data = i2c_get_clientdata(client);

        mutex_lock(&data->update_lock);

        if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {

                if (data->config & 0x04) { /* tachometer enabled  */

                        /* order matters for fan1_input */

                        data->fan[0] = i2c_smbus_read_byte_data(client,

                                       LM63_REG_TACH_COUNT_LSB) & 0xFC;

                        data->fan[0] |= i2c_smbus_read_byte_data(client,

                                        LM63_REG_TACH_COUNT_MSB) << 8;

                        data->fan[1] = (i2c_smbus_read_byte_data(client,

                                        LM63_REG_TACH_LIMIT_LSB) & 0xFC)

                                     | (i2c_smbus_read_byte_data(client,

                                        LM63_REG_TACH_LIMIT_MSB) << 8);

                }

                data->pwm1_freq = i2c_smbus_read_byte_data(client,

                                  LM63_REG_PWM_FREQ);

                if (data->pwm1_freq == 0)

                        data->pwm1_freq = 1;

                data->pwm1_value = i2c_smbus_read_byte_data(client,

                                   LM63_REG_PWM_VALUE);

                data->temp8[0] = i2c_smbus_read_byte_data(client,

                                 LM63_REG_LOCAL_TEMP);

                data->temp8[1] = i2c_smbus_read_byte_data(client,

                                 LM63_REG_LOCAL_HIGH);

                /* order matters for temp2_input */

                data->temp11[0] = i2c_smbus_read_byte_data(client,

                                  LM63_REG_REMOTE_TEMP_MSB) << 8;

                data->temp11[0] |= i2c_smbus_read_byte_data(client,

                                   LM63_REG_REMOTE_TEMP_LSB);

                data->temp11[1] = (i2c_smbus_read_byte_data(client,

                                  LM63_REG_REMOTE_LOW_MSB) << 8)

                                | i2c_smbus_read_byte_data(client,

                                  LM63_REG_REMOTE_LOW_LSB);

                data->temp11[2] = (i2c_smbus_read_byte_data(client,

                                  LM63_REG_REMOTE_HIGH_MSB) << 8)

                                | i2c_smbus_read_byte_data(client,

                                  LM63_REG_REMOTE_HIGH_LSB);

                data->temp8[2] = i2c_smbus_read_byte_data(client,

                                 LM63_REG_REMOTE_TCRIT);

                data->temp2_crit_hyst = i2c_smbus_read_byte_data(client,

                                        LM63_REG_REMOTE_TCRIT_HYST);

                data->alarms = i2c_smbus_read_byte_data(client,

                               LM63_REG_ALERT_STATUS) & 0x7F;

                data->last_updated = jiffies;

                data->valid = 1;

        }

        mutex_unlock(&data->update_lock);

        return data;

}

static int __init sensors_lm63_init(void)

{

        return i2c_add_driver(&lm63_driver);

}

static void __exit sensors_lm63_exit(void)

{

        i2c_del_driver(&lm63_driver);

}