hwmon: Add a driver for the ADT7475 hardware monitoring chip

Hwmon driver for the ADT7475 chip.

Signed-off-by: Jordan Crouse <jordan.crouse@amd.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>

1 files changed, 1221 insertions, 0 deletions

diff --git a/drivers/hwmon/adt7475.c b/drivers/hwmon/adt7475.c
new file mode 100644
index 000000000000..d39877a7da63
--- /dev/null
+++ b/drivers/hwmon/adt7475.c
@@ -0,0 +1,1221 @@
+/*
+ * adt7475 - Thermal sensor driver for the ADT7475 chip and derivatives
+ * Copyright (C) 2007-2008, Advanced Micro Devices, Inc.
+ * Copyright (C) 2008 Jordan Crouse <jordan@cosmicpenguin.net>
+ * Copyright (C) 2008 Hans de Goede <hdegoede@redhat.com>
+
+ * Derived from the lm83 driver by Jean Delvare
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#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>
+
+/* Indexes for the sysfs hooks */
+
+#define INPUT           0
+#define MIN             1
+#define MAX             2
+#define CONTROL         3
+#define OFFSET          3
+#define AUTOMIN         4
+#define THERM           5
+#define HYSTERSIS       6
+
+/* These are unique identifiers for the sysfs functions - unlike the
+   numbers above, these are not also indexes into an array
+*/
+
+#define ALARM           9
+#define FAULT           10
+
+/* 7475 Common Registers */
+
+#define REG_VOLTAGE_BASE        0x21
+#define REG_TEMP_BASE           0x25
+#define REG_TACH_BASE           0x28
+#define REG_PWM_BASE            0x30
+#define REG_PWM_MAX_BASE        0x38
+
+#define REG_DEVID               0x3D
+#define REG_VENDID              0x3E
+
+#define REG_STATUS1             0x41
+#define REG_STATUS2             0x42
+
+#define REG_VOLTAGE_MIN_BASE    0x46
+#define REG_VOLTAGE_MAX_BASE    0x47
+
+#define REG_TEMP_MIN_BASE       0x4E
+#define REG_TEMP_MAX_BASE       0x4F
+
+#define REG_TACH_MIN_BASE       0x54
+
+#define REG_PWM_CONFIG_BASE     0x5C
+
+#define REG_TEMP_TRANGE_BASE    0x5F
+
+#define REG_PWM_MIN_BASE        0x64
+
+#define REG_TEMP_TMIN_BASE      0x67
+#define REG_TEMP_THERM_BASE     0x6A
+
+#define REG_REMOTE1_HYSTERSIS   0x6D
+#define REG_REMOTE2_HYSTERSIS   0x6E
+
+#define REG_TEMP_OFFSET_BASE    0x70
+
+#define REG_EXTEND1             0x76
+#define REG_EXTEND2             0x77
+#define REG_CONFIG5             0x7C
+
+#define CONFIG5_TWOSCOMP        0x01
+#define CONFIG5_TEMPOFFSET      0x02
+
+/* ADT7475 Settings */
+
+#define ADT7475_VOLTAGE_COUNT   2
+#define ADT7475_TEMP_COUNT      3
+#define ADT7475_TACH_COUNT      4
+#define ADT7475_PWM_COUNT       3
+
+/* Macro to read the registers */
+
+#define adt7475_read(reg) i2c_smbus_read_byte_data(client, (reg))
+
+/* Macros to easily index the registers */
+
+#define TACH_REG(idx) (REG_TACH_BASE + ((idx) * 2))
+#define TACH_MIN_REG(idx) (REG_TACH_MIN_BASE + ((idx) * 2))
+
+#define PWM_REG(idx) (REG_PWM_BASE + (idx))
+#define PWM_MAX_REG(idx) (REG_PWM_MAX_BASE + (idx))
+#define PWM_MIN_REG(idx) (REG_PWM_MIN_BASE + (idx))
+#define PWM_CONFIG_REG(idx) (REG_PWM_CONFIG_BASE + (idx))
+
+#define VOLTAGE_REG(idx) (REG_VOLTAGE_BASE + (idx))
+#define VOLTAGE_MIN_REG(idx) (REG_VOLTAGE_MIN_BASE + ((idx) * 2))
+#define VOLTAGE_MAX_REG(idx) (REG_VOLTAGE_MAX_BASE + ((idx) * 2))
+
+#define TEMP_REG(idx) (REG_TEMP_BASE + (idx))
+#define TEMP_MIN_REG(idx) (REG_TEMP_MIN_BASE + ((idx) * 2))
+#define TEMP_MAX_REG(idx) (REG_TEMP_MAX_BASE + ((idx) * 2))
+#define TEMP_TMIN_REG(idx) (REG_TEMP_TMIN_BASE + (idx))
+#define TEMP_THERM_REG(idx) (REG_TEMP_THERM_BASE + (idx))
+#define TEMP_OFFSET_REG(idx) (REG_TEMP_OFFSET_BASE + (idx))
+#define TEMP_TRANGE_REG(idx) (REG_TEMP_TRANGE_BASE + (idx))
+
+static unsigned short normal_i2c[] = { 0x2e, I2C_CLIENT_END };
+
+I2C_CLIENT_INSMOD_1(adt7475);
+
+static const struct i2c_device_id adt7475_id[] = {
+        { "adt7475", adt7475 },
+        { }
+};
+MODULE_DEVICE_TABLE(i2c, adt7475_id);
+
+struct adt7475_data {
+        struct device *hwmon_dev;
+        struct mutex lock;
+
+        unsigned long measure_updated;
+        unsigned long limits_updated;
+        char valid;
+
+        u8 config5;
+        u16 alarms;
+        u16 voltage[3][3];
+        u16 temp[7][3];
+        u16 tach[2][4];
+        u8 pwm[4][3];
+        u8 range[3];
+        u8 pwmctl[3];
+        u8 pwmchan[3];
+};
+
+static struct i2c_driver adt7475_driver;
+static struct adt7475_data *adt7475_update_device(struct device *dev);
+static void adt7475_read_hystersis(struct i2c_client *client);
+static void adt7475_read_pwm(struct i2c_client *client, int index);
+
+/* Given a temp value, convert it to register value */
+
+static inline u16 temp2reg(struct adt7475_data *data, long val)
+{
+        u16 ret;
+
+        if (!(data->config5 & CONFIG5_TWOSCOMP)) {
+                val = SENSORS_LIMIT(val, -64000, 191000);
+                ret = (val + 64500) / 1000;
+        } else {
+                val = SENSORS_LIMIT(val, -128000, 127000);
+                if (val < -500)
+                        ret = (256500 + val) / 1000;
+                else
+                        ret = (val + 500) / 1000;
+        }
+
+        return ret << 2;
+}
+
+/* Given a register value, convert it to a real temp value */
+
+static inline int reg2temp(struct adt7475_data *data, u16 reg)
+{
+        if (data->config5 & CONFIG5_TWOSCOMP) {
+                if (reg >= 512)
+                        return (reg - 1024) * 250;
+                else
+                        return reg * 250;
+        } else
+                return (reg - 256) * 250;
+}
+
+static inline int tach2rpm(u16 tach)
+{
+        if (tach == 0 || tach == 0xFFFF)
+                return 0;
+
+        return (90000 * 60) / tach;
+}
+
+static inline u16 rpm2tach(unsigned long rpm)
+{
+        if (rpm == 0)
+                return 0;
+
+        return SENSORS_LIMIT((90000 * 60) / rpm, 1, 0xFFFF);
+}
+
+static inline int reg2vcc(u16 reg)
+{
+        return (4296 * reg) / 1000;
+}
+
+static inline int reg2vccp(u16 reg)
+{
+        return (2929 * reg) / 1000;
+}
+
+static inline u16 vcc2reg(long vcc)
+{
+        vcc = SENSORS_LIMIT(vcc, 0, 4396);
+        return (vcc * 1000) / 4296;
+}
+
+static inline u16 vccp2reg(long vcc)
+{
+        vcc = SENSORS_LIMIT(vcc, 0, 2998);
+        return (vcc * 1000) / 2929;
+}
+
+static u16 adt7475_read_word(struct i2c_client *client, int reg)
+{
+        u16 val;
+
+        val = i2c_smbus_read_byte_data(client, reg);
+        val |= (i2c_smbus_read_byte_data(client, reg + 1) << 8);
+
+        return val;
+}
+
+static void adt7475_write_word(struct i2c_client *client, int reg, u16 val)
+{
+        i2c_smbus_write_byte_data(client, reg + 1, val >> 8);
+        i2c_smbus_write_byte_data(client, reg, val & 0xFF);
+}
+
+/* Find the nearest value in a table - used for pwm frequency and
+   auto temp range */
+static int find_nearest(long val, const int *array, int size)
+{
+        int i;
+
+        if (val < array[0])
+                return 0;
+
+        if (val > array[size - 1])
+                return size - 1;
+
+        for (i = 0; i < size - 1; i++) {
+                int a, b;
+
+                if (val > array[i + 1])
+                        continue;
+
+                a = val - array[i];
+                b = array[i + 1] - val;
+
+                return (a <= b) ? i : i + 1;
+        }
+
+        return 0;
+}
+
+static ssize_t show_voltage(struct device *dev, struct device_attribute *attr,
+                            char *buf)
+{
+        struct adt7475_data *data = adt7475_update_device(dev);
+        struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
+        unsigned short val;
+
+        switch (sattr->nr) {
+        case ALARM:
+                return sprintf(buf, "%d\n",
+                               (data->alarms >> (sattr->index + 1)) & 1);
+        default:
+                val = data->voltage[sattr->nr][sattr->index];
+                return sprintf(buf, "%d\n",
+                               sattr->index ==
+                               0 ? reg2vccp(val) : reg2vcc(val));
+        }
+}
+
+static ssize_t set_voltage(struct device *dev, struct device_attribute *attr,
+                           const char *buf, size_t count)
+{
+
+        struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
+        struct i2c_client *client = to_i2c_client(dev);
+        struct adt7475_data *data = i2c_get_clientdata(client);
+        unsigned char reg;
+        long val;
+
+        if (strict_strtol(buf, 10, &val))
+                return -EINVAL;
+
+        mutex_lock(&data->lock);
+
+        data->voltage[sattr->nr][sattr->index] =
+                sattr->index ? vcc2reg(val) : vccp2reg(val);
+
+        if (sattr->nr == MIN)
+                reg = VOLTAGE_MIN_REG(sattr->index);
+        else
+                reg = VOLTAGE_MAX_REG(sattr->index);
+
+        i2c_smbus_write_byte_data(client, reg,
+                                  data->voltage[sattr->nr][sattr->index] >> 2);
+        mutex_unlock(&data->lock);
+
+        return count;
+}
+
+static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
+                         char *buf)
+{
+        struct adt7475_data *data = adt7475_update_device(dev);
+        struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
+        int out;
+
+        switch (sattr->nr) {
+        case HYSTERSIS:
+                mutex_lock(&data->lock);
+                out = data->temp[sattr->nr][sattr->index];
+                if (sattr->index != 1)
+                        out = (out >> 4) & 0xF;
+                else
+                        out = (out & 0xF);
+                /* Show the value as an absolute number tied to
+                 * THERM */
+                out = reg2temp(data, data->temp[THERM][sattr->index]) -
+                        out * 1000;
+                mutex_unlock(&data->lock);
+                break;
+
+        case OFFSET:
+                /* Offset is always 2's complement, regardless of the
+                 * setting in CONFIG5 */
+                mutex_lock(&data->lock);
+                out = (s8)data->temp[sattr->nr][sattr->index];
+                if (data->config5 & CONFIG5_TEMPOFFSET)
+                        out *= 1000;
+                else
+                        out *= 500;
+                mutex_unlock(&data->lock);
+                break;
+
+        case ALARM:
+                out = (data->alarms >> (sattr->index + 4)) & 1;
+                break;
+
+        case FAULT:
+                /* Note - only for remote1 and remote2 */
+                out = data->alarms & (sattr->index ? 0x8000 : 0x4000);
+                out = out ? 0 : 1;
+                break;
+
+        default:
+                /* All other temp values are in the configured format */
+                out = reg2temp(data, data->temp[sattr->nr][sattr->index]);
+        }
+
+        return sprintf(buf, "%d\n", out);
+}
+
+static ssize_t set_temp(struct device *dev, struct device_attribute *attr,
+                        const char *buf, size_t count)
+{
+        struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
+        struct i2c_client *client = to_i2c_client(dev);
+        struct adt7475_data *data = i2c_get_clientdata(client);
+        unsigned char reg = 0;
+        u8 out;
+        int temp;
+        long val;
+
+        if (strict_strtol(buf, 10, &val))
+                return -EINVAL;
+
+        mutex_lock(&data->lock);
+
+        /* We need the config register in all cases for temp <-> reg conv. */
+        data->config5 = adt7475_read(REG_CONFIG5);
+
+        switch (sattr->nr) {
+        case OFFSET:
+                if (data->config5 & CONFIG5_TEMPOFFSET) {
+                        val = SENSORS_LIMIT(val, -63000, 127000);
+                        out = data->temp[OFFSET][sattr->index] = val / 1000;
+                } else {
+                        val = SENSORS_LIMIT(val, -63000, 64000);
+                        out = data->temp[OFFSET][sattr->index] = val / 500;
+                }
+                break;
+
+        case HYSTERSIS:
+                /* The value will be given as an absolute value, turn it
+                   into an offset based on THERM */
+
+                /* Read fresh THERM and HYSTERSIS values from the chip */
+                data->temp[THERM][sattr->index] =
+                        adt7475_read(TEMP_THERM_REG(sattr->index)) << 2;
+                adt7475_read_hystersis(client);
+
+                temp = reg2temp(data, data->temp[THERM][sattr->index]);
+                val = SENSORS_LIMIT(val, temp - 15000, temp);
+                val = (temp - val) / 1000;
+
+                if (sattr->index != 1) {
+                        data->temp[HYSTERSIS][sattr->index] &= 0xF0;
+                        data->temp[HYSTERSIS][sattr->index] |= (val & 0xF) << 4;
+                } else {
+                        data->temp[HYSTERSIS][sattr->index] &= 0x0F;
+                        data->temp[HYSTERSIS][sattr->index] |= (val & 0xF);
+                }
+
+                out = data->temp[HYSTERSIS][sattr->index];
+                break;
+
+        default:
+                data->temp[sattr->nr][sattr->index] = temp2reg(data, val);
+
+                /* We maintain an extra 2 digits of precision for simplicity
+                 * - shift those back off before writing the value */
+                out = (u8) (data->temp[sattr->nr][sattr->index] >> 2);
+        }
+
+        switch (sattr->nr) {
+        case MIN:
+                reg = TEMP_MIN_REG(sattr->index);
+                break;
+        case MAX:
+                reg = TEMP_MAX_REG(sattr->index);
+                break;
+        case OFFSET:
+                reg = TEMP_OFFSET_REG(sattr->index);
+                break;
+        case AUTOMIN:
+                reg = TEMP_TMIN_REG(sattr->index);
+                break;
+        case THERM:
+                reg = TEMP_THERM_REG(sattr->index);
+                break;
+        case HYSTERSIS:
+                if (sattr->index != 2)
+                        reg = REG_REMOTE1_HYSTERSIS;
+                else
+                        reg = REG_REMOTE2_HYSTERSIS;
+
+                break;
+        }
+
+        i2c_smbus_write_byte_data(client, reg, out);
+
+        mutex_unlock(&data->lock);
+        return count;
+}
+
+/* Table of autorange values - the user will write the value in millidegrees,
+   and we'll convert it */
+static const int autorange_table[] = {
+        2000, 2500, 3330, 4000, 5000, 6670, 8000,
+        10000, 13330, 16000, 20000, 26670, 32000, 40000,
+        53330, 80000
+};
+
+static ssize_t show_point2(struct device *dev, struct device_attribute *attr,
+                           char *buf)
+{
+        struct adt7475_data *data = adt7475_update_device(dev);
+        struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
+        int out, val;
+
+        mutex_lock(&data->lock);
+        out = (data->range[sattr->index] >> 4) & 0x0F;
+        val = reg2temp(data, data->temp[AUTOMIN][sattr->index]);
+        mutex_unlock(&data->lock);
+
+        return sprintf(buf, "%d\n", val + autorange_table[out]);
+}
+
+static ssize_t set_point2(struct device *dev, struct device_attribute *attr,
+                          const char *buf, size_t count)
+{
+        struct i2c_client *client = to_i2c_client(dev);
+        struct adt7475_data *data = i2c_get_clientdata(client);
+        struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
+        int temp;
+        long val;
+
+        if (strict_strtol(buf, 10, &val))
+                return -EINVAL;
+
+        mutex_lock(&data->lock);
+
+        /* Get a fresh copy of the needed registers */
+        data->config5 = adt7475_read(REG_CONFIG5);
+        data->temp[AUTOMIN][sattr->index] =
+                adt7475_read(TEMP_TMIN_REG(sattr->index)) << 2;
+        data->range[sattr->index] =
+                adt7475_read(TEMP_TRANGE_REG(sattr->index));
+
+        /* The user will write an absolute value, so subtract the start point
+           to figure the range */
+        temp = reg2temp(data, data->temp[AUTOMIN][sattr->index]);
+        val = SENSORS_LIMIT(val, temp + autorange_table[0],
+                temp + autorange_table[ARRAY_SIZE(autorange_table) - 1]);
+        val -= temp;
+
+        /* Find the nearest table entry to what the user wrote */
+        val = find_nearest(val, autorange_table, ARRAY_SIZE(autorange_table));
+
+        data->range[sattr->index] &= ~0xF0;
+        data->range[sattr->index] |= val << 4;
+
+        i2c_smbus_write_byte_data(client, TEMP_TRANGE_REG(sattr->index),
+                                  data->range[sattr->index]);
+
+        mutex_unlock(&data->lock);
+        return count;
+}
+
+static ssize_t show_tach(struct device *dev, struct device_attribute *attr,
+                         char *buf)
+{
+        struct adt7475_data *data = adt7475_update_device(dev);
+        struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
+        int out;
+
+        if (sattr->nr == ALARM)
+                out = (data->alarms >> (sattr->index + 10)) & 1;
+        else
+                out = tach2rpm(data->tach[sattr->nr][sattr->index]);
+
+        return sprintf(buf, "%d\n", out);
+}
+
+static ssize_t set_tach(struct device *dev, struct device_attribute *attr,
+                        const char *buf, size_t count)
+{
+
+        struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
+        struct i2c_client *client = to_i2c_client(dev);
+        struct adt7475_data *data = i2c_get_clientdata(client);
+        unsigned long val;
+
+        if (strict_strtoul(buf, 10, &val))
+                return -EINVAL;
+
+        mutex_lock(&data->lock);
+
+        data->tach[MIN][sattr->index] = rpm2tach(val);
+
+        adt7475_write_word(client, TACH_MIN_REG(sattr->index),
+                           data->tach[MIN][sattr->index]);
+
+        mutex_unlock(&data->lock);
+        return count;
+}
+
+static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
+                        char *buf)
+{
+        struct adt7475_data *data = adt7475_update_device(dev);
+        struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
+
+        return sprintf(buf, "%d\n", data->pwm[sattr->nr][sattr->index]);
+}
+
+static ssize_t show_pwmchan(struct device *dev, struct device_attribute *attr,
+                            char *buf)
+{
+        struct adt7475_data *data = adt7475_update_device(dev);
+        struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
+
+        return sprintf(buf, "%d\n", data->pwmchan[sattr->index]);
+}
+
+static ssize_t show_pwmctrl(struct device *dev, struct device_attribute *attr,
+                            char *buf)
+{
+        struct adt7475_data *data = adt7475_update_device(dev);
+        struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
+
+        return sprintf(buf, "%d\n", data->pwmctl[sattr->index]);
+}
+
+static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
+                       const char *buf, size_t count)
+{
+
+        struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
+        struct i2c_client *client = to_i2c_client(dev);
+        struct adt7475_data *data = i2c_get_clientdata(client);
+        unsigned char reg = 0;
+        long val;
+
+        if (strict_strtol(buf, 10, &val))
+                return -EINVAL;
+
+        mutex_lock(&data->lock);
+
+        switch (sattr->nr) {
+        case INPUT:
+                /* Get a fresh value for CONTROL */
+                data->pwm[CONTROL][sattr->index] =
+                        adt7475_read(PWM_CONFIG_REG(sattr->index));
+
+                /* If we are not in manual mode, then we shouldn't allow
+                 * the user to set the pwm speed */
+                if (((data->pwm[CONTROL][sattr->index] >> 5) & 7) != 7) {
+                        mutex_unlock(&data->lock);
+                        return count;
+                }
+
+                reg = PWM_REG(sattr->index);
+                break;
+
+        case MIN:
+                reg = PWM_MIN_REG(sattr->index);
+                break;
+
+        case MAX:
+                reg = PWM_MAX_REG(sattr->index);
+                break;
+        }
+
+        data->pwm[sattr->nr][sattr->index] = SENSORS_LIMIT(val, 0, 0xFF);
+        i2c_smbus_write_byte_data(client, reg,
+                                  data->pwm[sattr->nr][sattr->index]);
+
+        mutex_unlock(&data->lock);
+
+        return count;
+}
+
+/* Called by set_pwmctrl and set_pwmchan */
+
+static int hw_set_pwm(struct i2c_client *client, int index,
+                      unsigned int pwmctl, unsigned int pwmchan)
+{
+        struct adt7475_data *data = i2c_get_clientdata(client);
+        long val = 0;
+
+        switch (pwmctl) {
+        case 0:
+                val = 0x03;     /* Run at full speed */
+                break;
+        case 1:
+                val = 0x07;     /* Manual mode */
+                break;
+        case 2:
+                switch (pwmchan) {
+                case 1:
+                        /* Remote1 controls PWM */
+                        val = 0x00;
+                        break;
+                case 2:
+                        /* local controls PWM */
+                        val = 0x01;
+                        break;
+                case 4:
+                        /* remote2 controls PWM */
+                        val = 0x02;
+                        break;
+                case 6:
+                        /* local/remote2 control PWM */
+                        val = 0x05;
+                        break;
+                case 7:
+                        /* All three control PWM */
+                        val = 0x06;
+                        break;
+                default:
+                        return -EINVAL;
+                }
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        data->pwmctl[index] = pwmctl;
+        data->pwmchan[index] = pwmchan;
+
+        data->pwm[CONTROL][index] &= ~0xE0;
+        data->pwm[CONTROL][index] |= (val & 7) << 5;
+
+        i2c_smbus_write_byte_data(client, PWM_CONFIG_REG(index),
+                                  data->pwm[CONTROL][index]);
+
+        return 0;
+}
+
+static ssize_t set_pwmchan(struct device *dev, struct device_attribute *attr,
+                           const char *buf, size_t count)
+{
+        struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
+        struct i2c_client *client = to_i2c_client(dev);
+        struct adt7475_data *data = i2c_get_clientdata(client);
+        int r;
+        long val;
+
+        if (strict_strtol(buf, 10, &val))
+                return -EINVAL;
+
+        mutex_lock(&data->lock);
+        /* Read Modify Write PWM values */
+        adt7475_read_pwm(client, sattr->index);
+        r = hw_set_pwm(client, sattr->index, data->pwmctl[sattr->index], val);
+        if (r)
+                count = r;
+        mutex_unlock(&data->lock);
+
+        return count;
+}
+
+static ssize_t set_pwmctrl(struct device *dev, struct device_attribute *attr,
+                           const char *buf, size_t count)
+{
+        struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
+        struct i2c_client *client = to_i2c_client(dev);
+        struct adt7475_data *data = i2c_get_clientdata(client);
+        int r;
+        long val;
+
+        if (strict_strtol(buf, 10, &val))
+                return -EINVAL;
+
+        mutex_lock(&data->lock);
+        /* Read Modify Write PWM values */
+        adt7475_read_pwm(client, sattr->index);
+        r = hw_set_pwm(client, sattr->index, val, data->pwmchan[sattr->index]);
+        if (r)
+                count = r;
+        mutex_unlock(&data->lock);
+
+        return count;
+}
+
+/* List of frequencies for the PWM */
+static const int pwmfreq_table[] = {
+        11, 14, 22, 29, 35, 44, 58, 88
+};
+
+static ssize_t show_pwmfreq(struct device *dev, struct device_attribute *attr,
+                            char *buf)
+{
+        struct adt7475_data *data = adt7475_update_device(dev);
+        struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
+
+        return sprintf(buf, "%d\n",
+                       pwmfreq_table[data->range[sattr->index] & 7]);
+}
+
+static ssize_t set_pwmfreq(struct device *dev, struct device_attribute *attr,
+                           const char *buf, size_t count)
+{
+        struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
+        struct i2c_client *client = to_i2c_client(dev);
+        struct adt7475_data *data = i2c_get_clientdata(client);
+        int out;
+        long val;
+
+        if (strict_strtol(buf, 10, &val))
+                return -EINVAL;
+
+        out = find_nearest(val, pwmfreq_table, ARRAY_SIZE(pwmfreq_table));
+
+        mutex_lock(&data->lock);
+
+        data->range[sattr->index] =
+                adt7475_read(TEMP_TRANGE_REG(sattr->index));
+        data->range[sattr->index] &= ~7;
+        data->range[sattr->index] |= out;
+
+        i2c_smbus_write_byte_data(client, TEMP_TRANGE_REG(sattr->index),
+                                  data->range[sattr->index]);
+
+        mutex_unlock(&data->lock);
+        return count;
+}
+
+static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_voltage, NULL, INPUT, 0);
+static SENSOR_DEVICE_ATTR_2(in1_max, S_IRUGO | S_IWUSR, show_voltage,
+                            set_voltage, MAX, 0);
+static SENSOR_DEVICE_ATTR_2(in1_min, S_IRUGO | S_IWUSR, show_voltage,
+                            set_voltage, MIN, 0);
+static SENSOR_DEVICE_ATTR_2(in1_alarm, S_IRUGO, show_voltage, NULL, ALARM, 0);
+static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO, show_voltage, NULL, INPUT, 1);
+static SENSOR_DEVICE_ATTR_2(in2_max, S_IRUGO | S_IWUSR, show_voltage,
+                            set_voltage, MAX, 1);
+static SENSOR_DEVICE_ATTR_2(in2_min, S_IRUGO | S_IWUSR, show_voltage,
+                            set_voltage, MIN, 1);
+static SENSOR_DEVICE_ATTR_2(in2_alarm, S_IRUGO, show_voltage, NULL, ALARM, 1);
+static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, INPUT, 0);
+static SENSOR_DEVICE_ATTR_2(temp1_alarm, S_IRUGO, show_temp, NULL, ALARM, 0);
+static SENSOR_DEVICE_ATTR_2(temp1_fault, S_IRUGO, show_temp, NULL, FAULT, 0);
+static SENSOR_DEVICE_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
+                            MAX, 0);
+static SENSOR_DEVICE_ATTR_2(temp1_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
+                            MIN, 0);
+static SENSOR_DEVICE_ATTR_2(temp1_offset, S_IRUGO | S_IWUSR, show_temp,
+                            set_temp, OFFSET, 0);
+static SENSOR_DEVICE_ATTR_2(temp1_auto_point1_temp, S_IRUGO | S_IWUSR,
+                            show_temp, set_temp, AUTOMIN, 0);
+static SENSOR_DEVICE_ATTR_2(temp1_auto_point2_temp, S_IRUGO | S_IWUSR,
+                            show_point2, set_point2, 0, 0);
+static SENSOR_DEVICE_ATTR_2(temp1_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
+                            THERM, 0);
+static SENSOR_DEVICE_ATTR_2(temp1_crit_hyst, S_IRUGO | S_IWUSR, show_temp,
+                            set_temp, HYSTERSIS, 0);
+static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, INPUT, 1);
+static SENSOR_DEVICE_ATTR_2(temp2_alarm, S_IRUGO, show_temp, NULL, ALARM, 1);
+static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
+                            MAX, 1);
+static SENSOR_DEVICE_ATTR_2(temp2_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
+                            MIN, 1);
+static SENSOR_DEVICE_ATTR_2(temp2_offset, S_IRUGO | S_IWUSR, show_temp,
+                            set_temp, OFFSET, 1);
+static SENSOR_DEVICE_ATTR_2(temp2_auto_point1_temp, S_IRUGO | S_IWUSR,
+                            show_temp, set_temp, AUTOMIN, 1);
+static SENSOR_DEVICE_ATTR_2(temp2_auto_point2_temp, S_IRUGO | S_IWUSR,
+                            show_point2, set_point2, 0, 1);
+static SENSOR_DEVICE_ATTR_2(temp2_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
+                            THERM, 1);
+static SENSOR_DEVICE_ATTR_2(temp2_crit_hyst, S_IRUGO | S_IWUSR, show_temp,
+                            set_temp, HYSTERSIS, 1);
+static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, INPUT, 2);
+static SENSOR_DEVICE_ATTR_2(temp3_alarm, S_IRUGO, show_temp, NULL, ALARM, 2);
+static SENSOR_DEVICE_ATTR_2(temp3_fault, S_IRUGO, show_temp, NULL, FAULT, 2);
+static SENSOR_DEVICE_ATTR_2(temp3_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
+                            MAX, 2);
+static SENSOR_DEVICE_ATTR_2(temp3_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
+                            MIN, 2);
+static SENSOR_DEVICE_ATTR_2(temp3_offset, S_IRUGO | S_IWUSR, show_temp,
+                            set_temp, OFFSET, 2);
+static SENSOR_DEVICE_ATTR_2(temp3_auto_point1_temp, S_IRUGO | S_IWUSR,
+                            show_temp, set_temp, AUTOMIN, 2);
+static SENSOR_DEVICE_ATTR_2(temp3_auto_point2_temp, S_IRUGO | S_IWUSR,
+                            show_point2, set_point2, 0, 2);
+static SENSOR_DEVICE_ATTR_2(temp3_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
+                            THERM, 2);
+static SENSOR_DEVICE_ATTR_2(temp3_crit_hyst, S_IRUGO | S_IWUSR, show_temp,
+                            set_temp, HYSTERSIS, 2);
+static SENSOR_DEVICE_ATTR_2(fan1_input, S_IRUGO, show_tach, NULL, INPUT, 0);
+static SENSOR_DEVICE_ATTR_2(fan1_min, S_IRUGO | S_IWUSR, show_tach, set_tach,
+                            MIN, 0);
+static SENSOR_DEVICE_ATTR_2(fan1_alarm, S_IRUGO, show_tach, NULL, ALARM, 0);
+static SENSOR_DEVICE_ATTR_2(fan2_input, S_IRUGO, show_tach, NULL, INPUT, 1);
+static SENSOR_DEVICE_ATTR_2(fan2_min, S_IRUGO | S_IWUSR, show_tach, set_tach,
+                            MIN, 1);
+static SENSOR_DEVICE_ATTR_2(fan2_alarm, S_IRUGO, show_tach, NULL, ALARM, 1);
+static SENSOR_DEVICE_ATTR_2(fan3_input, S_IRUGO, show_tach, NULL, INPUT, 2);
+static SENSOR_DEVICE_ATTR_2(fan3_min, S_IRUGO | S_IWUSR, show_tach, set_tach,
+                            MIN, 2);
+static SENSOR_DEVICE_ATTR_2(fan3_alarm, S_IRUGO, show_tach, NULL, ALARM, 2);
+static SENSOR_DEVICE_ATTR_2(fan4_input, S_IRUGO, show_tach, NULL, INPUT, 3);
+static SENSOR_DEVICE_ATTR_2(fan4_min, S_IRUGO | S_IWUSR, show_tach, set_tach,
+                            MIN, 3);
+static SENSOR_DEVICE_ATTR_2(fan4_alarm, S_IRUGO, show_tach, NULL, ALARM, 3);
+static SENSOR_DEVICE_ATTR_2(pwm1, S_IRUGO | S_IWUSR, show_pwm, set_pwm, INPUT,
+                            0);
+static SENSOR_DEVICE_ATTR_2(pwm1_freq, S_IRUGO | S_IWUSR, show_pwmfreq,
+                            set_pwmfreq, INPUT, 0);
+static SENSOR_DEVICE_ATTR_2(pwm1_enable, S_IRUGO | S_IWUSR, show_pwmctrl,
+                            set_pwmctrl, INPUT, 0);
+static SENSOR_DEVICE_ATTR_2(pwm1_auto_channel_temp, S_IRUGO | S_IWUSR,
+                            show_pwmchan, set_pwmchan, INPUT, 0);
+static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_pwm, S_IRUGO | S_IWUSR, show_pwm,
+                            set_pwm, MIN, 0);
+static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_pwm, S_IRUGO | S_IWUSR, show_pwm,
+                            set_pwm, MAX, 0);
+static SENSOR_DEVICE_ATTR_2(pwm2, S_IRUGO | S_IWUSR, show_pwm, set_pwm, INPUT,
+                            1);
+static SENSOR_DEVICE_ATTR_2(pwm2_freq, S_IRUGO | S_IWUSR, show_pwmfreq,
+                            set_pwmfreq, INPUT, 1);
+static SENSOR_DEVICE_ATTR_2(pwm2_enable, S_IRUGO | S_IWUSR, show_pwmctrl,
+                            set_pwmctrl, INPUT, 1);
+static SENSOR_DEVICE_ATTR_2(pwm2_auto_channel_temp, S_IRUGO | S_IWUSR,
+                            show_pwmchan, set_pwmchan, INPUT, 1);
+static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_pwm, S_IRUGO | S_IWUSR, show_pwm,
+                            set_pwm, MIN, 1);
+static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_pwm, S_IRUGO | S_IWUSR, show_pwm,
+                            set_pwm, MAX, 1);
+static SENSOR_DEVICE_ATTR_2(pwm3, S_IRUGO | S_IWUSR, show_pwm, set_pwm, INPUT,
+                            2);
+static SENSOR_DEVICE_ATTR_2(pwm3_freq, S_IRUGO | S_IWUSR, show_pwmfreq,
+                            set_pwmfreq, INPUT, 2);
+static SENSOR_DEVICE_ATTR_2(pwm3_enable, S_IRUGO | S_IWUSR, show_pwmctrl,
+                            set_pwmctrl, INPUT, 2);
+static SENSOR_DEVICE_ATTR_2(pwm3_auto_channel_temp, S_IRUGO | S_IWUSR,
+                            show_pwmchan, set_pwmchan, INPUT, 2);
+static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_pwm, S_IRUGO | S_IWUSR, show_pwm,
+                            set_pwm, MIN, 2);
+static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_pwm, S_IRUGO | S_IWUSR, show_pwm,
+                            set_pwm, MAX, 2);
+
+static struct attribute *adt7475_attrs[] = {
+        &sensor_dev_attr_in1_input.dev_attr.attr,
+        &sensor_dev_attr_in1_max.dev_attr.attr,
+        &sensor_dev_attr_in1_min.dev_attr.attr,
+        &sensor_dev_attr_in1_alarm.dev_attr.attr,
+        &sensor_dev_attr_in2_input.dev_attr.attr,
+        &sensor_dev_attr_in2_max.dev_attr.attr,
+        &sensor_dev_attr_in2_min.dev_attr.attr,
+        &sensor_dev_attr_in2_alarm.dev_attr.attr,
+        &sensor_dev_attr_temp1_input.dev_attr.attr,
+        &sensor_dev_attr_temp1_alarm.dev_attr.attr,
+        &sensor_dev_attr_temp1_fault.dev_attr.attr,
+        &sensor_dev_attr_temp1_max.dev_attr.attr,
+        &sensor_dev_attr_temp1_min.dev_attr.attr,
+        &sensor_dev_attr_temp1_offset.dev_attr.attr,
+        &sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr,
+        &sensor_dev_attr_temp1_auto_point2_temp.dev_attr.attr,
+        &sensor_dev_attr_temp1_crit.dev_attr.attr,
+        &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
+        &sensor_dev_attr_temp2_input.dev_attr.attr,
+        &sensor_dev_attr_temp2_alarm.dev_attr.attr,
+        &sensor_dev_attr_temp2_max.dev_attr.attr,
+        &sensor_dev_attr_temp2_min.dev_attr.attr,
+        &sensor_dev_attr_temp2_offset.dev_attr.attr,
+        &sensor_dev_attr_temp2_auto_point1_temp.dev_attr.attr,
+        &sensor_dev_attr_temp2_auto_point2_temp.dev_attr.attr,
+        &sensor_dev_attr_temp2_crit.dev_attr.attr,
+        &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr,
+        &sensor_dev_attr_temp3_input.dev_attr.attr,
+        &sensor_dev_attr_temp3_fault.dev_attr.attr,
+        &sensor_dev_attr_temp3_alarm.dev_attr.attr,
+        &sensor_dev_attr_temp3_max.dev_attr.attr,
+        &sensor_dev_attr_temp3_min.dev_attr.attr,
+        &sensor_dev_attr_temp3_offset.dev_attr.attr,
+        &sensor_dev_attr_temp3_auto_point1_temp.dev_attr.attr,
+        &sensor_dev_attr_temp3_auto_point2_temp.dev_attr.attr,
+        &sensor_dev_attr_temp3_crit.dev_attr.attr,
+        &sensor_dev_attr_temp3_crit_hyst.dev_attr.attr,
+        &sensor_dev_attr_fan1_input.dev_attr.attr,
+        &sensor_dev_attr_fan1_min.dev_attr.attr,
+        &sensor_dev_attr_fan1_alarm.dev_attr.attr,
+        &sensor_dev_attr_fan2_input.dev_attr.attr,
+        &sensor_dev_attr_fan2_min.dev_attr.attr,
+        &sensor_dev_attr_fan2_alarm.dev_attr.attr,
+        &sensor_dev_attr_fan3_input.dev_attr.attr,
+        &sensor_dev_attr_fan3_min.dev_attr.attr,
+        &sensor_dev_attr_fan3_alarm.dev_attr.attr,
+        &sensor_dev_attr_fan4_input.dev_attr.attr,
+        &sensor_dev_attr_fan4_min.dev_attr.attr,
+        &sensor_dev_attr_fan4_alarm.dev_attr.attr,
+        &sensor_dev_attr_pwm1.dev_attr.attr,
+        &sensor_dev_attr_pwm1_freq.dev_attr.attr,
+        &sensor_dev_attr_pwm1_enable.dev_attr.attr,
+        &sensor_dev_attr_pwm1_auto_channel_temp.dev_attr.attr,
+        &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
+        &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
+        &sensor_dev_attr_pwm2.dev_attr.attr,
+        &sensor_dev_attr_pwm2_freq.dev_attr.attr,
+        &sensor_dev_attr_pwm2_enable.dev_attr.attr,
+        &sensor_dev_attr_pwm2_auto_channel_temp.dev_attr.attr,
+        &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
+        &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
+        &sensor_dev_attr_pwm3.dev_attr.attr,
+        &sensor_dev_attr_pwm3_freq.dev_attr.attr,
+        &sensor_dev_attr_pwm3_enable.dev_attr.attr,
+        &sensor_dev_attr_pwm3_auto_channel_temp.dev_attr.attr,
+        &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
+        &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
+        NULL,
+};
+
+struct attribute_group adt7475_attr_group = { .attrs = adt7475_attrs };
+
+static int adt7475_detect(struct i2c_client *client, int kind,
+                          struct i2c_board_info *info)
+{
+        struct i2c_adapter *adapter = client->adapter;
+
+        if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+                return -ENODEV;
+
+        if (kind <= 0) {
+                if (adt7475_read(REG_VENDID) != 0x41 ||
+                    adt7475_read(REG_DEVID) != 0x75) {
+                        dev_err(&adapter->dev,
+                                "Couldn't detect a adt7475 part at 0x%02x\n",
+                                (unsigned int)client->addr);
+                        return -ENODEV;
+                }
+        }
+
+        strlcpy(info->type, adt7475_id[0].name, I2C_NAME_SIZE);
+
+        return 0;
+}
+
+static int adt7475_probe(struct i2c_client *client,
+                         const struct i2c_device_id *id)
+{
+        struct adt7475_data *data;
+        int i, ret = 0;
+
+        data = kzalloc(sizeof(*data), GFP_KERNEL);
+        if (data == NULL)
+                return -ENOMEM;
+
+        mutex_init(&data->lock);
+        i2c_set_clientdata(client, data);
+
+        /* Call adt7475_read_pwm for all pwm's as this will reprogram any
+           pwm's which are disabled to manual mode with 0% duty cycle */
+        for (i = 0; i < ADT7475_PWM_COUNT; i++)
+                adt7475_read_pwm(client, i);
+
+        ret = sysfs_create_group(&client->dev.kobj, &adt7475_attr_group);
+        if (ret)
+                goto efree;
+
+        data->hwmon_dev = hwmon_device_register(&client->dev);
+        if (IS_ERR(data->hwmon_dev)) {
+                ret = PTR_ERR(data->hwmon_dev);
+                goto eremove;
+        }
+
+        return 0;
+
+eremove:
+        sysfs_remove_group(&client->dev.kobj, &adt7475_attr_group);
+efree:
+        kfree(data);
+        return ret;
+}
+
+static int adt7475_remove(struct i2c_client *client)
+{
+        struct adt7475_data *data = i2c_get_clientdata(client);
+
+        hwmon_device_unregister(data->hwmon_dev);
+        sysfs_remove_group(&client->dev.kobj, &adt7475_attr_group);
+        kfree(data);
+
+        return 0;
+}
+
+static struct i2c_driver adt7475_driver = {
+        .class          = I2C_CLASS_HWMON,
+        .driver = {
+                .name   = "adt7475",
+        },
+        .probe          = adt7475_probe,
+        .remove         = adt7475_remove,
+        .id_table       = adt7475_id,
+        .detect         = adt7475_detect,
+        .address_data   = &addr_data,
+};
+
+static void adt7475_read_hystersis(struct i2c_client *client)
+{
+        struct adt7475_data *data = i2c_get_clientdata(client);
+
+        data->temp[HYSTERSIS][0] = (u16) adt7475_read(REG_REMOTE1_HYSTERSIS);
+        data->temp[HYSTERSIS][1] = data->temp[HYSTERSIS][0];
+        data->temp[HYSTERSIS][2] = (u16) adt7475_read(REG_REMOTE2_HYSTERSIS);
+}
+
+static void adt7475_read_pwm(struct i2c_client *client, int index)
+{
+        struct adt7475_data *data = i2c_get_clientdata(client);
+        unsigned int v;
+
+        data->pwm[CONTROL][index] = adt7475_read(PWM_CONFIG_REG(index));
+
+        /* Figure out the internal value for pwmctrl and pwmchan
+           based on the current settings */
+        v = (data->pwm[CONTROL][index] >> 5) & 7;
+
+        if (v == 3)
+                data->pwmctl[index] = 0;
+        else if (v == 7)
+                data->pwmctl[index] = 1;
+        else if (v == 4) {
+                /* The fan is disabled - we don't want to
+                   support that, so change to manual mode and
+                   set the duty cycle to 0 instead
+                */
+                data->pwm[INPUT][index] = 0;
+                data->pwm[CONTROL][index] &= ~0xE0;
+                data->pwm[CONTROL][index] |= (7 << 5);
+
+                i2c_smbus_write_byte_data(client, PWM_CONFIG_REG(index),
+                                          data->pwm[INPUT][index]);
+
+                i2c_smbus_write_byte_data(client, PWM_CONFIG_REG(index),
+                                          data->pwm[CONTROL][index]);
+
+                data->pwmctl[index] = 1;
+        } else {
+                data->pwmctl[index] = 2;
+
+                switch (v) {
+                case 0:
+                        data->pwmchan[index] = 1;
+                        break;
+                case 1:
+                        data->pwmchan[index] = 2;
+                        break;
+                case 2:
+                        data->pwmchan[index] = 4;
+                        break;
+                case 5:
+                        data->pwmchan[index] = 6;
+                        break;
+                case 6:
+                        data->pwmchan[index] = 7;
+                        break;
+                }
+        }
+}
+
+static struct adt7475_data *adt7475_update_device(struct device *dev)
+{
+        struct i2c_client *client = to_i2c_client(dev);
+        struct adt7475_data *data = i2c_get_clientdata(client);
+        u8 ext;
+        int i;
+
+        mutex_lock(&data->lock);
+
+        /* Measurement values update every 2 seconds */
+        if (time_after(jiffies, data->measure_updated + HZ * 2) ||
+            !data->valid) {
+                data->alarms = adt7475_read(REG_STATUS2) << 8;
+                data->alarms |= adt7475_read(REG_STATUS1);
+
+                ext = adt7475_read(REG_EXTEND1);
+                for (i = 0; i < ADT7475_VOLTAGE_COUNT; i++)
+                        data->voltage[INPUT][i] =
+                                (adt7475_read(VOLTAGE_REG(i)) << 2) |
+                                ((ext >> ((i + 1) * 2)) & 3);
+
+                ext = adt7475_read(REG_EXTEND2);
+                for (i = 0; i < ADT7475_TEMP_COUNT; i++)
+                        data->temp[INPUT][i] =
+                                (adt7475_read(TEMP_REG(i)) << 2) |
+                                ((ext >> ((i + 1) * 2)) & 3);
+
+                for (i = 0; i < ADT7475_TACH_COUNT; i++)
+                        data->tach[INPUT][i] =
+                                adt7475_read_word(client, TACH_REG(i));
+
+                /* Updated by hw when in auto mode */
+                for (i = 0; i < ADT7475_PWM_COUNT; i++)
+                        data->pwm[INPUT][i] = adt7475_read(PWM_REG(i));
+
+                data->measure_updated = jiffies;
+        }
+
+        /* Limits and settings, should never change update every 60 seconds */
+        if (time_after(jiffies, data->limits_updated + HZ * 2) ||
+            !data->valid) {
+                data->config5 = adt7475_read(REG_CONFIG5);
+
+                for (i = 0; i < ADT7475_VOLTAGE_COUNT; i++) {
+                        /* Adjust values so they match the input precision */
+                        data->voltage[MIN][i] =
+                                adt7475_read(VOLTAGE_MIN_REG(i)) << 2;
+                        data->voltage[MAX][i] =
+                                adt7475_read(VOLTAGE_MAX_REG(i)) << 2;
+                }
+
+                for (i = 0; i < ADT7475_TEMP_COUNT; i++) {
+                        /* Adjust values so they match the input precision */
+                        data->temp[MIN][i] =
+                                adt7475_read(TEMP_MIN_REG(i)) << 2;
+                        data->temp[MAX][i] =
+                                adt7475_read(TEMP_MAX_REG(i)) << 2;
+                        data->temp[AUTOMIN][i] =
+                                adt7475_read(TEMP_TMIN_REG(i)) << 2;
+                        data->temp[THERM][i] =
+                                adt7475_read(TEMP_THERM_REG(i)) << 2;
+                        data->temp[OFFSET][i] =
+                                adt7475_read(TEMP_OFFSET_REG(i));
+                }
+                adt7475_read_hystersis(client);
+
+                for (i = 0; i < ADT7475_TACH_COUNT; i++)
+                        data->tach[MIN][i] =
+                                adt7475_read_word(client, TACH_MIN_REG(i));
+
+                for (i = 0; i < ADT7475_PWM_COUNT; i++) {
+                        data->pwm[MAX][i] = adt7475_read(PWM_MAX_REG(i));
+                        data->pwm[MIN][i] = adt7475_read(PWM_MIN_REG(i));
+                        /* Set the channel and control information */
+                        adt7475_read_pwm(client, i);
+                }
+
+                data->range[0] = adt7475_read(TEMP_TRANGE_REG(0));
+                data->range[1] = adt7475_read(TEMP_TRANGE_REG(1));
+                data->range[2] = adt7475_read(TEMP_TRANGE_REG(2));
+
+                data->limits_updated = jiffies;
+                data->valid = 1;
+        }
+
+        mutex_unlock(&data->lock);
+
+        return data;
+}
+
+static int __init sensors_adt7475_init(void)
+{
+        return i2c_add_driver(&adt7475_driver);
+}
+
+static void __exit sensors_adt7475_exit(void)
+{
+        i2c_del_driver(&adt7475_driver);
+}
+
+MODULE_AUTHOR("Advanced Micro Devices, Inc");
+MODULE_DESCRIPTION("adt7475 driver");
+MODULE_LICENSE("GPL");
+
+module_init(sensors_adt7475_init);
+module_exit(sensors_adt7475_exit);