Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 908 insertions, 0 deletions

diff --git a/drivers/hwmon/f75375s.c b/drivers/hwmon/f75375s.c
new file mode 100644
index 0000000000..8c572bb64f
--- /dev/null
+++ b/drivers/hwmon/f75375s.c
@@ -0,0 +1,908 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * f75375s.c - driver for the Fintek F75375/SP, F75373 and
+ *             F75387SG/RG hardware monitoring features
+ * Copyright (C) 2006-2007  Riku Voipio
+ *
+ * Datasheets available at:
+ *
+ * f75375:
+ * http://www.fintek.com.tw/files/productfiles/F75375_V026P.pdf
+ *
+ * f75373:
+ * http://www.fintek.com.tw/files/productfiles/F75373_V025P.pdf
+ *
+ * f75387:
+ * http://www.fintek.com.tw/files/productfiles/F75387_V027P.pdf
+ */
+
+#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>
+#include <linux/f75375s.h>
+#include <linux/slab.h>
+
+/* Addresses to scan */
+static const unsigned short normal_i2c[] = { 0x2d, 0x2e, I2C_CLIENT_END };
+
+enum chips { f75373, f75375, f75387 };
+
+/* 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 F75387_REG_TEMP11_LSB(nr)	(0x1a + (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 F75375_FAN_CTRL_LINEAR(nr)	(4 + nr)
+#define F75387_FAN_CTRL_LINEAR(nr)	(1 + ((nr) * 4))
+#define FAN_CTRL_MODE(nr)		(4 + ((nr) * 2))
+#define F75387_FAN_DUTY_MODE(nr)	(2 + ((nr) * 4))
+#define F75387_FAN_MANU_MODE(nr)	((nr) * 4)
+
+/*
+ * Data structures and manipulation thereof
+ */
+
+struct f75375_data {
+	unsigned short addr;
+	struct device *hwmon_dev;
+
+	const char *name;
+	int kind;
+	struct mutex update_lock; /* protect register access */
+	bool 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_max[2];
+	u16 fan_target[2];
+	u8 fan_timer;
+	u8 pwm[2];
+	u8 pwm_mode[2];
+	u8 pwm_enable[2];
+	/*
+	 * f75387: For remote temperature reading, it uses signed 11-bit
+	 * values with LSB = 0.125 degree Celsius, left-justified in 16-bit
+	 * registers. For original 8-bit temp readings, the LSB just is 0.
+	 */
+	s16 temp11[2];
+	s8 temp_high[2];
+	s8 temp_max_hyst[2];
+};
+
+static int f75375_detect(struct i2c_client *client,
+			 struct i2c_board_info *info);
+static int f75375_probe(struct i2c_client *client);
+static void f75375_remove(struct i2c_client *client);
+
+static const struct i2c_device_id f75375_id[] = {
+	{ "f75373", f75373 },
+	{ "f75375", f75375 },
+	{ "f75387", f75387 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, f75375_id);
+
+static struct i2c_driver f75375_driver = {
+	.class = I2C_CLASS_HWMON,
+	.driver = {
+		.name = "f75375",
+	},
+	.probe = f75375_probe,
+	.remove = f75375_remove,
+	.id_table = f75375_id,
+	.detect = f75375_detect,
+	.address_list = normal_i2c,
+};
+
+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 void f75375_write_pwm(struct i2c_client *client, int nr)
+{
+	struct f75375_data *data = i2c_get_clientdata(client);
+	if (data->kind == f75387)
+		f75375_write16(client, F75375_REG_FAN_EXP(nr), data->pwm[nr]);
+	else
+		f75375_write8(client, F75375_REG_FAN_PWM_DUTY(nr),
+			      data->pwm[nr]);
+}
+
+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_max[nr] =
+				f75375_read16(client, F75375_REG_FAN_FULL(nr));
+			data->fan_min[nr] =
+				f75375_read16(client, F75375_REG_FAN_MIN(nr));
+			data->fan_target[nr] =
+				f75375_read16(client, F75375_REG_FAN_EXP(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->pwm[nr] =	f75375_read8(client,
+				F75375_REG_FAN_PWM_DUTY(nr));
+			/* assign MSB, therefore shift it by 8 bits */
+			data->temp11[nr] =
+				f75375_read8(client, F75375_REG_TEMP(nr)) << 8;
+			if (data->kind == f75387)
+				/* merge F75387's temperature LSB (11-bit) */
+				data->temp11[nr] |=
+					f75375_read8(client,
+						     F75387_REG_TEMP11_LSB(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 = true;
+	}
+
+	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 bool duty_mode_enabled(u8 pwm_enable)
+{
+	switch (pwm_enable) {
+	case 0: /* Manual, duty mode (full speed) */
+	case 1: /* Manual, duty mode */
+	case 4: /* Auto, duty mode */
+		return true;
+	case 2: /* Auto, speed mode */
+	case 3: /* Manual, speed mode */
+		return false;
+	default:
+		WARN(1, "Unexpected pwm_enable value %d\n", pwm_enable);
+		return true;
+	}
+}
+
+static bool auto_mode_enabled(u8 pwm_enable)
+{
+	switch (pwm_enable) {
+	case 0: /* Manual, duty mode (full speed) */
+	case 1: /* Manual, duty mode */
+	case 3: /* Manual, speed mode */
+		return false;
+	case 2: /* Auto, speed mode */
+	case 4: /* Auto, duty mode */
+		return true;
+	default:
+		WARN(1, "Unexpected pwm_enable value %d\n", pwm_enable);
+		return false;
+	}
+}
+
+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);
+	unsigned long val;
+	int err;
+
+	err = kstrtoul(buf, 10, &val);
+	if (err < 0)
+		return err;
+
+	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_target(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);
+	unsigned long val;
+	int err;
+
+	err = kstrtoul(buf, 10, &val);
+	if (err < 0)
+		return err;
+
+	if (auto_mode_enabled(data->pwm_enable[nr]))
+		return -EINVAL;
+	if (data->kind == f75387 && duty_mode_enabled(data->pwm_enable[nr]))
+		return -EINVAL;
+
+	mutex_lock(&data->update_lock);
+	data->fan_target[nr] = rpm_to_reg(val);
+	f75375_write16(client, F75375_REG_FAN_EXP(nr), data->fan_target[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);
+	unsigned long val;
+	int err;
+
+	err = kstrtoul(buf, 10, &val);
+	if (err < 0)
+		return err;
+
+	if (auto_mode_enabled(data->pwm_enable[nr]) ||
+	    !duty_mode_enabled(data->pwm_enable[nr]))
+		return -EINVAL;
+
+	mutex_lock(&data->update_lock);
+	data->pwm[nr] = clamp_val(val, 0, 255);
+	f75375_write_pwm(client, 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 int set_pwm_enable_direct(struct i2c_client *client, int nr, int val)
+{
+	struct f75375_data *data = i2c_get_clientdata(client);
+	u8 fanmode;
+
+	if (val < 0 || val > 4)
+		return -EINVAL;
+
+	fanmode = f75375_read8(client, F75375_REG_FAN_TIMER);
+	if (data->kind == f75387) {
+		/* For now, deny dangerous toggling of duty mode */
+		if (duty_mode_enabled(data->pwm_enable[nr]) !=
+				duty_mode_enabled(val))
+			return -EOPNOTSUPP;
+		/* clear each fanX_mode bit before setting them properly */
+		fanmode &= ~(1 << F75387_FAN_DUTY_MODE(nr));
+		fanmode &= ~(1 << F75387_FAN_MANU_MODE(nr));
+		switch (val) {
+		case 0: /* full speed */
+			fanmode |= (1 << F75387_FAN_MANU_MODE(nr));
+			fanmode |= (1 << F75387_FAN_DUTY_MODE(nr));
+			data->pwm[nr] = 255;
+			break;
+		case 1: /* PWM */
+			fanmode  |= (1 << F75387_FAN_MANU_MODE(nr));
+			fanmode  |= (1 << F75387_FAN_DUTY_MODE(nr));
+			break;
+		case 2: /* Automatic, speed mode */
+			break;
+		case 3: /* fan speed */
+			fanmode |= (1 << F75387_FAN_MANU_MODE(nr));
+			break;
+		case 4: /* Automatic, pwm */
+			fanmode |= (1 << F75387_FAN_DUTY_MODE(nr));
+			break;
+		}
+	} else {
+		/* clear each fanX_mode bit before setting them properly */
+		fanmode &= ~(3 << FAN_CTRL_MODE(nr));
+		switch (val) {
+		case 0: /* full speed */
+			fanmode  |= (3 << FAN_CTRL_MODE(nr));
+			data->pwm[nr] = 255;
+			break;
+		case 1: /* PWM */
+			fanmode  |= (3 << FAN_CTRL_MODE(nr));
+			break;
+		case 2: /* AUTOMATIC*/
+			fanmode  |= (1 << FAN_CTRL_MODE(nr));
+			break;
+		case 3: /* fan speed */
+			break;
+		case 4: /* Automatic pwm */
+			return -EINVAL;
+		}
+	}
+
+	f75375_write8(client, F75375_REG_FAN_TIMER, fanmode);
+	data->pwm_enable[nr] = val;
+	if (val == 0)
+		f75375_write_pwm(client, nr);
+	return 0;
+}
+
+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);
+	unsigned long val;
+	int err;
+
+	err = kstrtoul(buf, 10, &val);
+	if (err < 0)
+		return err;
+
+	mutex_lock(&data->update_lock);
+	err = set_pwm_enable_direct(client, nr, val);
+	mutex_unlock(&data->update_lock);
+	return err ? err : 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);
+	unsigned long val;
+	int err;
+	u8 conf;
+	char reg, ctrl;
+
+	err = kstrtoul(buf, 10, &val);
+	if (err < 0)
+		return err;
+
+	if (!(val == 0 || val == 1))
+		return -EINVAL;
+
+	/* F75373 does not support DC (linear voltage) fan control mode */
+	if (data->kind == f75373 && val == 0)
+		return -EINVAL;
+
+	/* take care for different registers */
+	if (data->kind == f75387) {
+		reg = F75375_REG_FAN_TIMER;
+		ctrl = F75387_FAN_CTRL_LINEAR(nr);
+	} else {
+		reg = F75375_REG_CONFIG1;
+		ctrl = F75375_FAN_CTRL_LINEAR(nr);
+	}
+
+	mutex_lock(&data->update_lock);
+	conf = f75375_read8(client, reg);
+	conf &= ~(1 << ctrl);
+
+	if (val == 0)
+		conf |= (1 << ctrl);
+
+	f75375_write8(client, reg, 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);
+	unsigned long val;
+	int err;
+
+	err = kstrtoul(buf, 10, &val);
+	if (err < 0)
+		return err;
+
+	val = clamp_val(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);
+	unsigned long val;
+	int err;
+
+	err = kstrtoul(buf, 10, &val);
+	if (err < 0)
+		return err;
+
+	val = clamp_val(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)
+#define TEMP11_FROM_REG(reg)	((reg) / 32 * 125)
+
+static ssize_t show_temp11(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", TEMP11_FROM_REG(data->temp11[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);
+	unsigned long val;
+	int err;
+
+	err = kstrtoul(buf, 10, &val);
+	if (err < 0)
+		return err;
+
+	val = clamp_val(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);
+	unsigned long val;
+	int err;
+
+	err = kstrtoul(buf, 10, &val);
+	if (err < 0)
+		return err;
+
+	val = clamp_val(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_max);
+show_fan(fan_target);
+
+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_temp11, 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_temp11, 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_max, S_IRUGO, show_fan_max, NULL, 0);
+static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO|S_IWUSR,
+	show_fan_min, set_fan_min, 0);
+static SENSOR_DEVICE_ATTR(fan1_target, S_IRUGO|S_IWUSR,
+	show_fan_target, set_fan_target, 0);
+static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
+static SENSOR_DEVICE_ATTR(fan2_max, S_IRUGO, show_fan_max, NULL, 1);
+static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO|S_IWUSR,
+	show_fan_min, set_fan_min, 1);
+static SENSOR_DEVICE_ATTR(fan2_target, S_IRUGO|S_IWUSR,
+	show_fan_target, set_fan_target, 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,
+	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,
+	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_max.dev_attr.attr,
+	&sensor_dev_attr_fan1_min.dev_attr.attr,
+	&sensor_dev_attr_fan1_target.dev_attr.attr,
+	&sensor_dev_attr_fan2_input.dev_attr.attr,
+	&sensor_dev_attr_fan2_max.dev_attr.attr,
+	&sensor_dev_attr_fan2_min.dev_attr.attr,
+	&sensor_dev_attr_fan2_target.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 void f75375_init(struct i2c_client *client, struct f75375_data *data,
+		struct f75375s_platform_data *f75375s_pdata)
+{
+	int nr;
+
+	if (!f75375s_pdata) {
+		u8 conf, mode;
+		int nr;
+
+		conf = f75375_read8(client, F75375_REG_CONFIG1);
+		mode = f75375_read8(client, F75375_REG_FAN_TIMER);
+		for (nr = 0; nr < 2; nr++) {
+			if (data->kind == f75387) {
+				bool manu, duty;
+
+				if (!(mode & (1 << F75387_FAN_CTRL_LINEAR(nr))))
+					data->pwm_mode[nr] = 1;
+
+				manu = ((mode >> F75387_FAN_MANU_MODE(nr)) & 1);
+				duty = ((mode >> F75387_FAN_DUTY_MODE(nr)) & 1);
+				if (!manu && duty)
+					/* auto, pwm */
+					data->pwm_enable[nr] = 4;
+				else if (manu && !duty)
+					/* manual, speed */
+					data->pwm_enable[nr] = 3;
+				else if (!manu && !duty)
+					/* automatic, speed */
+					data->pwm_enable[nr] = 2;
+				else
+					/* manual, pwm */
+					data->pwm_enable[nr] = 1;
+			} else {
+				if (!(conf & (1 << F75375_FAN_CTRL_LINEAR(nr))))
+					data->pwm_mode[nr] = 1;
+
+				switch ((mode >> FAN_CTRL_MODE(nr)) & 3) {
+				case 0:		/* speed */
+					data->pwm_enable[nr] = 3;
+					break;
+				case 1:		/* automatic */
+					data->pwm_enable[nr] = 2;
+					break;
+				default:	/* manual */
+					data->pwm_enable[nr] = 1;
+					break;
+				}
+			}
+		}
+		return;
+	}
+
+	set_pwm_enable_direct(client, 0, f75375s_pdata->pwm_enable[0]);
+	set_pwm_enable_direct(client, 1, f75375s_pdata->pwm_enable[1]);
+	for (nr = 0; nr < 2; nr++) {
+		if (auto_mode_enabled(f75375s_pdata->pwm_enable[nr]) ||
+		    !duty_mode_enabled(f75375s_pdata->pwm_enable[nr]))
+			continue;
+		data->pwm[nr] = clamp_val(f75375s_pdata->pwm[nr], 0, 255);
+		f75375_write_pwm(client, nr);
+	}
+
+}
+
+static int f75375_probe(struct i2c_client *client)
+{
+	struct f75375_data *data;
+	struct f75375s_platform_data *f75375s_pdata =
+			dev_get_platdata(&client->dev);
+	int err;
+
+	if (!i2c_check_functionality(client->adapter,
+				I2C_FUNC_SMBUS_BYTE_DATA))
+		return -EIO;
+	data = devm_kzalloc(&client->dev, sizeof(struct f75375_data),
+			    GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	i2c_set_clientdata(client, data);
+	mutex_init(&data->update_lock);
+	data->kind = i2c_match_id(f75375_id, client)->driver_data;
+
+	err = sysfs_create_group(&client->dev.kobj, &f75375_group);
+	if (err)
+		return err;
+
+	if (data->kind != f75373) {
+		err = sysfs_chmod_file(&client->dev.kobj,
+			&sensor_dev_attr_pwm1_mode.dev_attr.attr,
+			S_IRUGO | S_IWUSR);
+		if (err)
+			goto exit_remove;
+		err = sysfs_chmod_file(&client->dev.kobj,
+			&sensor_dev_attr_pwm2_mode.dev_attr.attr,
+			S_IRUGO | S_IWUSR);
+		if (err)
+			goto exit_remove;
+	}
+
+	data->hwmon_dev = hwmon_device_register(&client->dev);
+	if (IS_ERR(data->hwmon_dev)) {
+		err = PTR_ERR(data->hwmon_dev);
+		goto exit_remove;
+	}
+
+	f75375_init(client, data, f75375s_pdata);
+
+	return 0;
+
+exit_remove:
+	sysfs_remove_group(&client->dev.kobj, &f75375_group);
+	return err;
+}
+
+static void f75375_remove(struct i2c_client *client)
+{
+	struct f75375_data *data = i2c_get_clientdata(client);
+	hwmon_device_unregister(data->hwmon_dev);
+	sysfs_remove_group(&client->dev.kobj, &f75375_group);
+}
+
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int f75375_detect(struct i2c_client *client,
+			 struct i2c_board_info *info)
+{
+	struct i2c_adapter *adapter = client->adapter;
+	u16 vendid, chipid;
+	u8 version;
+	const char *name;
+
+	vendid = f75375_read16(client, F75375_REG_VENDOR);
+	chipid = f75375_read16(client, F75375_CHIP_ID);
+	if (vendid != 0x1934)
+		return -ENODEV;
+
+	if (chipid == 0x0306)
+		name = "f75375";
+	else if (chipid == 0x0204)
+		name = "f75373";
+	else if (chipid == 0x0410)
+		name = "f75387";
+	else
+		return -ENODEV;
+
+	version = f75375_read8(client, F75375_REG_VERSION);
+	dev_info(&adapter->dev, "found %s version: %02X\n", name, version);
+	strscpy(info->type, name, I2C_NAME_SIZE);
+
+	return 0;
+}
+
+module_i2c_driver(f75375_driver);
+
+MODULE_AUTHOR("Riku Voipio");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("F75373/F75375/F75387 hardware monitoring driver");