hwmon: Add f75375s driver

Add support for Fintek F75375S/SP and F75373.

Signed-off-by: Riku Voipio <riku.voipio@movial.fi>
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>

3 files changed, 702 insertions, 0 deletions

diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index da15d535be6c..a2f60748951d 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -236,6 +236,16 @@ config SENSORS_F71882FG
           This driver can also be built as a module.  If so, the module
           will be called f71882fg.
 
+config SENSORS_F75375S
+        tristate "Fintek F75375S/SP and F75373";
+        depends on I2C && EXPERIMENTAL
+        help
+          If you say yes here you get support for hardware monitoring
+          features of the Fintek F75375S/SP and F75373
+
+          This driver can also be built as a module.  If so, the module
+          will be called f75375s.
+
 config SENSORS_FSCHER
         tristate "FSC Hermes"
         depends on I2C
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index fb4e0d8a7f5f..19da12ec140c 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -31,6 +31,7 @@ obj-$(CONFIG_SENSORS_DME1737)	+= dme1737.o
 obj-$(CONFIG_SENSORS_DS1621)    += ds1621.o
 obj-$(CONFIG_SENSORS_F71805F)   += f71805f.o
 obj-$(CONFIG_SENSORS_F71882FG)  += f71882fg.o
+obj-$(CONFIG_SENSORS_F75375S)   += f75375s.o
 obj-$(CONFIG_SENSORS_FSCHER)    += fscher.o
 obj-$(CONFIG_SENSORS_FSCPOS)    += fscpos.o
 obj-$(CONFIG_SENSORS_GL518SM)   += gl518sm.o
diff --git a/drivers/hwmon/f75375s.c b/drivers/hwmon/f75375s.c
new file mode 100644
index 000000000000..6425184d9316
--- /dev/null
+++ b/drivers/hwmon/f75375s.c
@@ -0,0 +1,691 @@
+/*
+ * f75375s.c - driver for the Fintek F75375/SP and F75373
+ *             hardware monitoring features
+ * Copyright (C) 2006-2007  Riku Voipio <riku.voipio@movial.fi>
+ *
+ * Datasheets available at:
+ *
+ * f75375:
+ * http://www.fintek.com.tw/files/productfiles/2005111152950.pdf
+ *
+ * f75373:
+ * http://www.fintek.com.tw/files/productfiles/2005111153128.pdf
+ *
+ * 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/jiffies.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/i2c.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+
+/* Addresses to scan */
+static unsigned short normal_i2c[] = { 0x2d, 0x2e, I2C_CLIENT_END };
+
+/* Insmod parameters */
+I2C_CLIENT_INSMOD_2(f75373, f75375);
+
+/* Fintek F75375 registers  */
+#define F75375_REG_CONFIG0              0x0
+#define F75375_REG_CONFIG1              0x1
+#define F75375_REG_CONFIG2              0x2
+#define F75375_REG_CONFIG3              0x3
+#define F75375_REG_ADDR                 0x4
+#define F75375_REG_INTR                 0x31
+#define F75375_CHIP_ID                  0x5A
+#define F75375_REG_VERSION              0x5C
+#define F75375_REG_VENDOR               0x5D
+#define F75375_REG_FAN_TIMER            0x60
+
+#define F75375_REG_VOLT(nr)             (0x10 + (nr))
+#define F75375_REG_VOLT_HIGH(nr)        (0x20 + (nr) * 2)
+#define F75375_REG_VOLT_LOW(nr)         (0x21 + (nr) * 2)
+
+#define F75375_REG_TEMP(nr)             (0x14 + (nr))
+#define F75375_REG_TEMP_HIGH(nr)        (0x28 + (nr) * 2)
+#define F75375_REG_TEMP_HYST(nr)        (0x29 + (nr) * 2)
+
+#define F75375_REG_FAN(nr)              (0x16 + (nr) * 2)
+#define F75375_REG_FAN_MIN(nr)          (0x2C + (nr) * 2)
+#define F75375_REG_FAN_FULL(nr)         (0x70 + (nr) * 0x10)
+#define F75375_REG_FAN_PWM_DUTY(nr)     (0x76 + (nr) * 0x10)
+#define F75375_REG_FAN_PWM_CLOCK(nr)    (0x7D + (nr) * 0x10)
+
+#define F75375_REG_FAN_EXP(nr)          (0x74 + (nr) * 0x10)
+#define F75375_REG_FAN_B_TEMP(nr, step) ((0xA0 + (nr) * 0x10) + (step))
+#define F75375_REG_FAN_B_SPEED(nr, step) \
+        ((0xA5 + (nr) * 0x10) + (step) * 2)
+
+#define F75375_REG_PWM1_RAISE_DUTY      0x69
+#define F75375_REG_PWM2_RAISE_DUTY      0x6A
+#define F75375_REG_PWM1_DROP_DUTY       0x6B
+#define F75375_REG_PWM2_DROP_DUTY       0x6C
+
+#define FAN_CTRL_LINEAR(nr)             (4 + nr)
+#define FAN_CTRL_MODE(nr)               (5 + ((nr) * 2))
+
+/*
+ * Data structures and manipulation thereof
+ */
+
+struct f75375_data {
+        unsigned short addr;
+        struct i2c_client client;
+        struct class_device *class_dev;
+
+        const char *name;
+        int kind;
+        struct mutex update_lock; /* protect register access */
+        char valid;
+        unsigned long last_updated;     /* In jiffies */
+        unsigned long last_limits;      /* In jiffies */
+
+        /* Register values */
+        u8 in[4];
+        u8 in_max[4];
+        u8 in_min[4];
+        u16 fan[2];
+        u16 fan_min[2];
+        u16 fan_full[2];
+        u16 fan_exp[2];
+        u8 fan_timer;
+        u8 pwm[2];
+        u8 pwm_mode[2];
+        u8 pwm_enable[2];
+        s8 temp[2];
+        s8 temp_high[2];
+        s8 temp_max_hyst[2];
+};
+
+static int f75375_attach_adapter(struct i2c_adapter *adapter);
+static int f75375_detect(struct i2c_adapter *adapter, int address, int kind);
+static int f75375_detach_client(struct i2c_client *client);
+
+static struct i2c_driver f75375_driver = {
+        .driver = {
+                .name = "f75375",
+        },
+        .attach_adapter = f75375_attach_adapter,
+        .detach_client = f75375_detach_client,
+};
+
+static inline int f75375_read8(struct i2c_client *client, u8 reg)
+{
+        return i2c_smbus_read_byte_data(client, reg);
+}
+
+/* in most cases, should be called while holding update_lock */
+static inline u16 f75375_read16(struct i2c_client *client, u8 reg)
+{
+        return ((i2c_smbus_read_byte_data(client, reg) << 8)
+                | i2c_smbus_read_byte_data(client, reg + 1));
+}
+
+static inline void f75375_write8(struct i2c_client *client, u8 reg,
+                u8 value)
+{
+        i2c_smbus_write_byte_data(client, reg, value);
+}
+
+static inline void f75375_write16(struct i2c_client *client, u8 reg,
+                u16 value)
+{
+        int err = i2c_smbus_write_byte_data(client, reg, (value << 8));
+        if (err)
+                return;
+        i2c_smbus_write_byte_data(client, reg + 1, (value & 0xFF));
+}
+
+static struct f75375_data *f75375_update_device(struct device *dev)
+{
+        struct i2c_client *client = to_i2c_client(dev);
+        struct f75375_data *data = i2c_get_clientdata(client);
+        int nr;
+
+        mutex_lock(&data->update_lock);
+
+        /* Limit registers cache is refreshed after 60 seconds */
+        if (time_after(jiffies, data->last_limits + 60 * HZ)
+                || !data->valid) {
+                for (nr = 0; nr < 2; nr++) {
+                        data->temp_high[nr] =
+                                f75375_read8(client, F75375_REG_TEMP_HIGH(nr));
+                        data->temp_max_hyst[nr] =
+                                f75375_read8(client, F75375_REG_TEMP_HYST(nr));
+                        data->fan_full[nr] =
+                                f75375_read16(client, F75375_REG_FAN_FULL(nr));
+                        data->fan_min[nr] =
+                                f75375_read16(client, F75375_REG_FAN_MIN(nr));
+                        data->fan_exp[nr] =
+                                f75375_read16(client, F75375_REG_FAN_EXP(nr));
+                        data->pwm[nr] = f75375_read8(client,
+                                F75375_REG_FAN_PWM_DUTY(nr));
+
+                }
+                for (nr = 0; nr < 4; nr++) {
+                        data->in_max[nr] =
+                                f75375_read8(client, F75375_REG_VOLT_HIGH(nr));
+                        data->in_min[nr] =
+                                f75375_read8(client, F75375_REG_VOLT_LOW(nr));
+                }
+                data->fan_timer = f75375_read8(client, F75375_REG_FAN_TIMER);
+                data->last_limits = jiffies;
+        }
+
+        /* Measurement registers cache is refreshed after 2 second */
+        if (time_after(jiffies, data->last_updated + 2 * HZ)
+                || !data->valid) {
+                for (nr = 0; nr < 2; nr++) {
+                        data->temp[nr] =
+                                f75375_read8(client, F75375_REG_TEMP(nr));
+                        data->fan[nr] =
+                                f75375_read16(client, F75375_REG_FAN(nr));
+                }
+                for (nr = 0; nr < 4; nr++)
+                        data->in[nr] =
+                                f75375_read8(client, F75375_REG_VOLT(nr));
+
+                data->last_updated = jiffies;
+                data->valid = 1;
+        }
+
+        mutex_unlock(&data->update_lock);
+        return data;
+}
+
+static inline u16 rpm_from_reg(u16 reg)
+{
+        if (reg == 0 || reg == 0xffff)
+                return 0;
+        return (1500000 / reg);
+}
+
+static inline u16 rpm_to_reg(int rpm)
+{
+        if (rpm < 367 || rpm > 0xffff)
+                return 0xffff;
+        return (1500000 / rpm);
+}
+
+static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
+                const char *buf, size_t count)
+{
+        int nr = to_sensor_dev_attr(attr)->index;
+        struct i2c_client *client = to_i2c_client(dev);
+        struct f75375_data *data = i2c_get_clientdata(client);
+        int val = simple_strtoul(buf, NULL, 10);
+
+        mutex_lock(&data->update_lock);
+        data->fan_min[nr] = rpm_to_reg(val);
+        f75375_write16(client, F75375_REG_FAN_MIN(nr), data->fan_min[nr]);
+        mutex_unlock(&data->update_lock);
+        return count;
+}
+
+static ssize_t set_fan_exp(struct device *dev, struct device_attribute *attr,
+                const char *buf, size_t count)
+{
+        int nr = to_sensor_dev_attr(attr)->index;
+        struct i2c_client *client = to_i2c_client(dev);
+        struct f75375_data *data = i2c_get_clientdata(client);
+        int val = simple_strtoul(buf, NULL, 10);
+
+        mutex_lock(&data->update_lock);
+        data->fan_exp[nr] = rpm_to_reg(val);
+        f75375_write16(client, F75375_REG_FAN_EXP(nr), data->fan_exp[nr]);
+        mutex_unlock(&data->update_lock);
+        return count;
+}
+
+static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
+                const char *buf, size_t count)
+{
+        int nr = to_sensor_dev_attr(attr)->index;
+        struct i2c_client *client = to_i2c_client(dev);
+        struct f75375_data *data = i2c_get_clientdata(client);
+        int val = simple_strtoul(buf, NULL, 10);
+
+        mutex_lock(&data->update_lock);
+        data->pwm[nr] = SENSORS_LIMIT(val, 0, 255);
+        f75375_write8(client, F75375_REG_FAN_PWM_DUTY(nr), data->pwm[nr]);
+        mutex_unlock(&data->update_lock);
+        return count;
+}
+
+static ssize_t show_pwm_enable(struct device *dev, struct device_attribute
+                *attr, char *buf)
+{
+        int nr = to_sensor_dev_attr(attr)->index;
+        struct f75375_data *data = f75375_update_device(dev);
+        return sprintf(buf, "%d\n", data->pwm_enable[nr]);
+}
+
+static ssize_t set_pwm_enable(struct device *dev, struct device_attribute *attr,
+                const char *buf, size_t count)
+{
+        int nr = to_sensor_dev_attr(attr)->index;
+        struct i2c_client *client = to_i2c_client(dev);
+        struct f75375_data *data = i2c_get_clientdata(client);
+        int val = simple_strtoul(buf, NULL, 10);
+        u8 fanmode;
+
+        if (val < 0 || val > 4)
+                return -EINVAL;
+
+        mutex_lock(&data->update_lock);
+        fanmode = f75375_read8(client, F75375_REG_FAN_TIMER);
+        fanmode = ~(3 << FAN_CTRL_MODE(nr));
+
+        switch (val) {
+        case 0: /* Full speed */
+                fanmode  |= (3 << FAN_CTRL_MODE(nr));
+                data->pwm[nr] = 255;
+                f75375_write8(client, F75375_REG_FAN_PWM_DUTY(nr),
+                                data->pwm[nr]);
+                break;
+        case 1: /* PWM */
+                fanmode  |= (3 << FAN_CTRL_MODE(nr));
+                break;
+        case 2: /* AUTOMATIC*/
+                fanmode  |= (2 << FAN_CTRL_MODE(nr));
+                break;
+        case 3: /* fan speed */
+                break;
+        }
+        f75375_write8(client, F75375_REG_FAN_TIMER, fanmode);
+        data->pwm_enable[nr] = val;
+        mutex_unlock(&data->update_lock);
+        return count;
+}
+
+static ssize_t set_pwm_mode(struct device *dev, struct device_attribute *attr,
+                const char *buf, size_t count)
+{
+        int nr = to_sensor_dev_attr(attr)->index;
+        struct i2c_client *client = to_i2c_client(dev);
+        struct f75375_data *data = i2c_get_clientdata(client);
+        int val = simple_strtoul(buf, NULL, 10);
+        u8 conf = 0;
+
+        if (val != 0 || val != 1 || data->kind == f75373)
+                return -EINVAL;
+
+        mutex_lock(&data->update_lock);
+        conf = f75375_read8(client, F75375_REG_CONFIG1);
+        conf = ~(1 << FAN_CTRL_LINEAR(nr));
+
+        if (val == 0)
+                conf |= (1 << FAN_CTRL_LINEAR(nr)) ;
+
+        f75375_write8(client, F75375_REG_CONFIG1, conf);
+        data->pwm_mode[nr] = val;
+        mutex_unlock(&data->update_lock);
+        return count;
+}
+
+static ssize_t show_pwm(struct device *dev, struct device_attribute
+                *attr, char *buf)
+{
+        int nr = to_sensor_dev_attr(attr)->index;
+        struct f75375_data *data = f75375_update_device(dev);
+        return sprintf(buf, "%d\n", data->pwm[nr]);
+}
+
+static ssize_t show_pwm_mode(struct device *dev, struct device_attribute
+                *attr, char *buf)
+{
+        int nr = to_sensor_dev_attr(attr)->index;
+        struct f75375_data *data = f75375_update_device(dev);
+        return sprintf(buf, "%d\n", data->pwm_mode[nr]);
+}
+
+#define VOLT_FROM_REG(val) ((val) * 8)
+#define VOLT_TO_REG(val) ((val) / 8)
+
+static ssize_t show_in(struct device *dev, struct device_attribute *attr,
+                char *buf)
+{
+        int nr = to_sensor_dev_attr(attr)->index;
+        struct f75375_data *data = f75375_update_device(dev);
+        return sprintf(buf, "%d\n", VOLT_FROM_REG(data->in[nr]));
+}
+
+static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
+                char *buf)
+{
+        int nr = to_sensor_dev_attr(attr)->index;
+        struct f75375_data *data = f75375_update_device(dev);
+        return sprintf(buf, "%d\n", VOLT_FROM_REG(data->in_max[nr]));
+}
+
+static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
+                char *buf)
+{
+        int nr = to_sensor_dev_attr(attr)->index;
+        struct f75375_data *data = f75375_update_device(dev);
+        return sprintf(buf, "%d\n", VOLT_FROM_REG(data->in_min[nr]));
+}
+
+static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
+                const char *buf, size_t count)
+{
+        int nr = to_sensor_dev_attr(attr)->index;
+        struct i2c_client *client = to_i2c_client(dev);
+        struct f75375_data *data = i2c_get_clientdata(client);
+        int val = simple_strtoul(buf, NULL, 10);
+        val = SENSORS_LIMIT(VOLT_TO_REG(val), 0, 0xff);
+        mutex_lock(&data->update_lock);
+        data->in_max[nr] = val;
+        f75375_write8(client, F75375_REG_VOLT_HIGH(nr), data->in_max[nr]);
+        mutex_unlock(&data->update_lock);
+        return count;
+}
+
+static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
+                const char *buf, size_t count)
+{
+        int nr = to_sensor_dev_attr(attr)->index;
+        struct i2c_client *client = to_i2c_client(dev);
+        struct f75375_data *data = i2c_get_clientdata(client);
+        int val = simple_strtoul(buf, NULL, 10);
+        val = SENSORS_LIMIT(VOLT_TO_REG(val), 0, 0xff);
+        mutex_lock(&data->update_lock);
+        data->in_min[nr] = val;
+        f75375_write8(client, F75375_REG_VOLT_LOW(nr), data->in_min[nr]);
+        mutex_unlock(&data->update_lock);
+        return count;
+}
+#define TEMP_FROM_REG(val) ((val) * 1000)
+#define TEMP_TO_REG(val) ((val) / 1000)
+
+static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
+                char *buf)
+{
+        int nr = to_sensor_dev_attr(attr)->index;
+        struct f75375_data *data = f75375_update_device(dev);
+        return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
+}
+
+static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
+                char *buf)
+{
+        int nr = to_sensor_dev_attr(attr)->index;
+        struct f75375_data *data = f75375_update_device(dev);
+        return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr]));
+}
+
+static ssize_t show_temp_max_hyst(struct device *dev,
+                struct device_attribute *attr, char *buf)
+{
+        int nr = to_sensor_dev_attr(attr)->index;
+        struct f75375_data *data = f75375_update_device(dev);
+        return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[nr]));
+}
+
+static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
+                const char *buf, size_t count)
+{
+        int nr = to_sensor_dev_attr(attr)->index;
+        struct i2c_client *client = to_i2c_client(dev);
+        struct f75375_data *data = i2c_get_clientdata(client);
+        int val = simple_strtol(buf, NULL, 10);
+        val = SENSORS_LIMIT(TEMP_TO_REG(val), 0, 127);
+        mutex_lock(&data->update_lock);
+        data->temp_high[nr] = val;
+        f75375_write8(client, F75375_REG_TEMP_HIGH(nr), data->temp_high[nr]);
+        mutex_unlock(&data->update_lock);
+        return count;
+}
+
+static ssize_t set_temp_max_hyst(struct device *dev,
+        struct device_attribute *attr, const char *buf, size_t count)
+{
+        int nr = to_sensor_dev_attr(attr)->index;
+        struct i2c_client *client = to_i2c_client(dev);
+        struct f75375_data *data = i2c_get_clientdata(client);
+        int val = simple_strtol(buf, NULL, 10);
+        val = SENSORS_LIMIT(TEMP_TO_REG(val), 0, 127);
+        mutex_lock(&data->update_lock);
+        data->temp_max_hyst[nr] = val;
+        f75375_write8(client, F75375_REG_TEMP_HYST(nr),
+                data->temp_max_hyst[nr]);
+        mutex_unlock(&data->update_lock);
+        return count;
+}
+
+#define show_fan(thing) \
+static ssize_t show_##thing(struct device *dev, struct device_attribute *attr, \
+                        char *buf)\
+{\
+        int nr = to_sensor_dev_attr(attr)->index;\
+        struct f75375_data *data = f75375_update_device(dev); \
+        return sprintf(buf, "%d\n", rpm_from_reg(data->thing[nr])); \
+}
+
+show_fan(fan);
+show_fan(fan_min);
+show_fan(fan_full);
+show_fan(fan_exp);
+
+static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in, NULL, 0);
+static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO|S_IWUSR,
+        show_in_max, set_in_max, 0);
+static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO|S_IWUSR,
+        show_in_min, set_in_min, 0);
+static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in, NULL, 1);
+static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO|S_IWUSR,
+        show_in_max, set_in_max, 1);
+static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO|S_IWUSR,
+        show_in_min, set_in_min, 1);
+static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in, NULL, 2);
+static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO|S_IWUSR,
+        show_in_max, set_in_max, 2);
+static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO|S_IWUSR,
+        show_in_min, set_in_min, 2);
+static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in, NULL, 3);
+static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO|S_IWUSR,
+        show_in_max, set_in_max, 3);
+static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO|S_IWUSR,
+        show_in_min, set_in_min, 3);
+static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
+static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO|S_IWUSR,
+        show_temp_max_hyst, set_temp_max_hyst, 0);
+static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO|S_IWUSR,
+        show_temp_max, set_temp_max, 0);
+static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
+static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO|S_IWUSR,
+        show_temp_max_hyst, set_temp_max_hyst, 1);
+static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO|S_IWUSR,
+        show_temp_max, set_temp_max, 1);
+static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
+static SENSOR_DEVICE_ATTR(fan1_full, S_IRUGO, show_fan_full, NULL, 0);
+static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO|S_IWUSR,
+        show_fan_min, set_fan_min, 0);
+static SENSOR_DEVICE_ATTR(fan1_exp, S_IRUGO|S_IWUSR,
+        show_fan_exp, set_fan_exp, 0);
+static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
+static SENSOR_DEVICE_ATTR(fan2_full, S_IRUGO, show_fan_full, NULL, 1);
+static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO|S_IWUSR,
+        show_fan_min, set_fan_min, 1);
+static SENSOR_DEVICE_ATTR(fan2_exp, S_IRUGO|S_IWUSR,
+        show_fan_exp, set_fan_exp, 1);
+static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO|S_IWUSR,
+        show_pwm, set_pwm, 0);
+static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO|S_IWUSR,
+        show_pwm_enable, set_pwm_enable, 0);
+static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO|S_IWUSR,
+        show_pwm_mode, set_pwm_mode, 0);
+static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR,
+        show_pwm, set_pwm, 1);
+static SENSOR_DEVICE_ATTR(pwm2_enable, S_IRUGO|S_IWUSR,
+        show_pwm_enable, set_pwm_enable, 1);
+static SENSOR_DEVICE_ATTR(pwm2_mode, S_IRUGO|S_IWUSR,
+        show_pwm_mode, set_pwm_mode, 1);
+
+static struct attribute *f75375_attributes[] = {
+        &sensor_dev_attr_temp1_input.dev_attr.attr,
+        &sensor_dev_attr_temp1_max.dev_attr.attr,
+        &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
+        &sensor_dev_attr_temp2_input.dev_attr.attr,
+        &sensor_dev_attr_temp2_max.dev_attr.attr,
+        &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
+        &sensor_dev_attr_fan1_input.dev_attr.attr,
+        &sensor_dev_attr_fan1_full.dev_attr.attr,
+        &sensor_dev_attr_fan1_min.dev_attr.attr,
+        &sensor_dev_attr_fan1_exp.dev_attr.attr,
+        &sensor_dev_attr_fan2_input.dev_attr.attr,
+        &sensor_dev_attr_fan2_full.dev_attr.attr,
+        &sensor_dev_attr_fan2_min.dev_attr.attr,
+        &sensor_dev_attr_fan2_exp.dev_attr.attr,
+        &sensor_dev_attr_pwm1.dev_attr.attr,
+        &sensor_dev_attr_pwm1_enable.dev_attr.attr,
+        &sensor_dev_attr_pwm1_mode.dev_attr.attr,
+        &sensor_dev_attr_pwm2.dev_attr.attr,
+        &sensor_dev_attr_pwm2_enable.dev_attr.attr,
+        &sensor_dev_attr_pwm2_mode.dev_attr.attr,
+        &sensor_dev_attr_in0_input.dev_attr.attr,
+        &sensor_dev_attr_in0_max.dev_attr.attr,
+        &sensor_dev_attr_in0_min.dev_attr.attr,
+        &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_in2_input.dev_attr.attr,
+        &sensor_dev_attr_in2_max.dev_attr.attr,
+        &sensor_dev_attr_in2_min.dev_attr.attr,
+        &sensor_dev_attr_in3_input.dev_attr.attr,
+        &sensor_dev_attr_in3_max.dev_attr.attr,
+        &sensor_dev_attr_in3_min.dev_attr.attr,
+        NULL
+};
+
+static const struct attribute_group f75375_group = {
+        .attrs = f75375_attributes,
+};
+
+static int f75375_detach_client(struct i2c_client *client)
+{
+        struct f75375_data *data = i2c_get_clientdata(client);
+        int err;
+
+        hwmon_device_unregister(data->class_dev);
+        sysfs_remove_group(&client->dev.kobj, &f75375_group);
+
+        err = i2c_detach_client(client);
+        if (err) {
+                dev_err(&client->dev,
+                        "Client deregistration failed, "
+                        "client not detached.\n");
+                return err;
+        }
+        kfree(data);
+        return 0;
+}
+
+static int f75375_attach_adapter(struct i2c_adapter *adapter)
+{
+        if (!(adapter->class & I2C_CLASS_HWMON))
+                return 0;
+        return i2c_probe(adapter, &addr_data, f75375_detect);
+}
+
+/* This function is called by i2c_probe */
+static int f75375_detect(struct i2c_adapter *adapter, int address, int kind)
+{
+        struct i2c_client *client;
+        struct f75375_data *data;
+        u8 version = 0;
+        int err = 0;
+        const char *name = "";
+
+        if (!(data = kzalloc(sizeof(struct f75375_data), GFP_KERNEL))) {
+                err = -ENOMEM;
+                goto exit;
+        }
+        client = &data->client;
+        i2c_set_clientdata(client, data);
+        client->addr = address;
+        client->adapter = adapter;
+        client->driver = &f75375_driver;
+
+        if (kind < 0) {
+                u16 vendid = f75375_read16(client, F75375_REG_VENDOR);
+                u16 chipid = f75375_read16(client, F75375_CHIP_ID);
+                version = f75375_read8(client, F75375_REG_VERSION);
+                if (chipid == 0x0306 && vendid == 0x1934) {
+                        kind = f75375;
+                } else if (chipid == 0x0204 && vendid == 0x1934) {
+                        kind = f75373;
+                } else {
+                        dev_err(&adapter->dev,
+                                "failed,%02X,%02X,%02X\n",
+                                chipid, version, vendid);
+                        goto exit_free;
+                }
+        }
+
+        if (kind == f75375) {
+                name = "f75375";
+        } else if (kind == f75373) {
+                name = "f75373";
+        }
+
+        dev_info(&adapter->dev, "found %s version: %02X\n", name, version);
+        strlcpy(client->name, name, I2C_NAME_SIZE);
+        data->kind = kind;
+        mutex_init(&data->update_lock);
+        if ((err = i2c_attach_client(client)))
+                goto exit_free;
+
+        if ((err = sysfs_create_group(&client->dev.kobj, &f75375_group)))
+                goto exit_detach;
+
+        data->class_dev = hwmon_device_register(&client->dev);
+        if (IS_ERR(data->class_dev)) {
+                err = PTR_ERR(data->class_dev);
+                goto exit_remove;
+        }
+
+        return 0;
+
+exit_remove:
+        sysfs_remove_group(&client->dev.kobj, &f75375_group);
+exit_detach:
+        i2c_detach_client(client);
+exit_free:
+        kfree(data);
+exit:
+        return err;
+}
+
+static int __init sensors_f75375_init(void)
+{
+        return i2c_add_driver(&f75375_driver);
+}
+
+static void __exit sensors_f75375_exit(void)
+{
+        i2c_del_driver(&f75375_driver);
+}
+
+MODULE_AUTHOR("Riku Voipio <riku.voipio@movial.fi>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("F75373/F75375 hardware monitoring driver");
+
+module_init(sensors_f75375_init);
+module_exit(sensors_f75375_exit);