diff --git a/drivers/hwmon/adt7475.c b/drivers/hwmon/adt7475.c
index 9ef84998c7f3..234f725213f9 100644
--- a/drivers/hwmon/adt7475.c
+++ b/drivers/hwmon/adt7475.c
@@ -1658,119 +1658,149 @@ static void adt7475_read_pwm(struct i2c_client *client, int index)
 	}
 }
 
-static struct adt7475_data *adt7475_update_device(struct device *dev)
+static int adt7475_update_measure(struct device *dev)
 {
 	struct i2c_client *client = to_i2c_client(dev);
 	struct adt7475_data *data = i2c_get_clientdata(client);
 	u16 ext;
 	int i;
 
-	mutex_lock(&data->lock);
+	data->alarms = adt7475_read(REG_STATUS2) << 8;
+	data->alarms |= adt7475_read(REG_STATUS1);
+
+	ext = (adt7475_read(REG_EXTEND2) << 8) |
+		adt7475_read(REG_EXTEND1);
+	for (i = 0; i < ADT7475_VOLTAGE_COUNT; i++) {
+		if (!(data->has_voltage & (1 << i)))
+			continue;
+		data->voltage[INPUT][i] =
+			(adt7475_read(VOLTAGE_REG(i)) << 2) |
+			((ext >> (i * 2)) & 3);
+	}
 
-	/* 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_EXTEND2) << 8) |
-			adt7475_read(REG_EXTEND1);
-		for (i = 0; i < ADT7475_VOLTAGE_COUNT; i++) {
-			if (!(data->has_voltage & (1 << i)))
-				continue;
-			data->voltage[INPUT][i] =
-				(adt7475_read(VOLTAGE_REG(i)) << 2) |
-				((ext >> (i * 2)) & 3);
-		}
+	for (i = 0; i < ADT7475_TEMP_COUNT; i++)
+		data->temp[INPUT][i] =
+			(adt7475_read(TEMP_REG(i)) << 2) |
+			((ext >> ((i + 5) * 2)) & 3);
+
+	if (data->has_voltage & (1 << 5)) {
+		data->alarms |= adt7475_read(REG_STATUS4) << 24;
+		ext = adt7475_read(REG_EXTEND3);
+		data->voltage[INPUT][5] = adt7475_read(REG_VTT) << 2 |
+			((ext >> 4) & 3);
+	}
 
-		for (i = 0; i < ADT7475_TEMP_COUNT; i++)
-			data->temp[INPUT][i] =
-				(adt7475_read(TEMP_REG(i)) << 2) |
-				((ext >> ((i + 5) * 2)) & 3);
+	for (i = 0; i < ADT7475_TACH_COUNT; i++) {
+		if (i == 3 && !data->has_fan4)
+			continue;
+		data->tach[INPUT][i] =
+			adt7475_read_word(client, TACH_REG(i));
+	}
 
-		if (data->has_voltage & (1 << 5)) {
-			data->alarms |= adt7475_read(REG_STATUS4) << 24;
-			ext = adt7475_read(REG_EXTEND3);
-			data->voltage[INPUT][5] = adt7475_read(REG_VTT) << 2 |
-				((ext >> 4) & 3);
-		}
+	/* Updated by hw when in auto mode */
+	for (i = 0; i < ADT7475_PWM_COUNT; i++) {
+		if (i == 1 && !data->has_pwm2)
+			continue;
+		data->pwm[INPUT][i] = adt7475_read(PWM_REG(i));
+	}
 
-		for (i = 0; i < ADT7475_TACH_COUNT; i++) {
-			if (i == 3 && !data->has_fan4)
-				continue;
-			data->tach[INPUT][i] =
-				adt7475_read_word(client, TACH_REG(i));
-		}
+	if (data->has_vid)
+		data->vid = adt7475_read(REG_VID) & 0x3f;
 
-		/* Updated by hw when in auto mode */
-		for (i = 0; i < ADT7475_PWM_COUNT; i++) {
-			if (i == 1 && !data->has_pwm2)
-				continue;
-			data->pwm[INPUT][i] = adt7475_read(PWM_REG(i));
-		}
+	return 0;
+}
 
-		if (data->has_vid)
-			data->vid = adt7475_read(REG_VID) & 0x3f;
+static int adt7475_update_limits(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct adt7475_data *data = i2c_get_clientdata(client);
+	int i;
 
-		data->measure_updated = jiffies;
+	data->config4 = adt7475_read(REG_CONFIG4);
+	data->config5 = adt7475_read(REG_CONFIG5);
+
+	for (i = 0; i < ADT7475_VOLTAGE_COUNT; i++) {
+		if (!(data->has_voltage & (1 << i)))
+			continue;
+		/* 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;
 	}
 
-	/* Limits and settings, should never change update every 60 seconds */
-	if (time_after(jiffies, data->limits_updated + HZ * 60) ||
-	    !data->valid) {
-		data->config4 = adt7475_read(REG_CONFIG4);
-		data->config5 = adt7475_read(REG_CONFIG5);
-
-		for (i = 0; i < ADT7475_VOLTAGE_COUNT; i++) {
-			if (!(data->has_voltage & (1 << i)))
-				continue;
-			/* 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;
-		}
+	if (data->has_voltage & (1 << 5)) {
+		data->voltage[MIN][5] = adt7475_read(REG_VTT_MIN) << 2;
+		data->voltage[MAX][5] = adt7475_read(REG_VTT_MAX) << 2;
+	}
 
-		if (data->has_voltage & (1 << 5)) {
-			data->voltage[MIN][5] = adt7475_read(REG_VTT_MIN) << 2;
-			data->voltage[MAX][5] = adt7475_read(REG_VTT_MAX) << 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_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++) {
+		if (i == 3 && !data->has_fan4)
+			continue;
+		data->tach[MIN][i] =
+			adt7475_read_word(client, TACH_MIN_REG(i));
+	}
 
-		for (i = 0; i < ADT7475_TACH_COUNT; i++) {
-			if (i == 3 && !data->has_fan4)
-				continue;
-			data->tach[MIN][i] =
-				adt7475_read_word(client, TACH_MIN_REG(i));
-		}
+	for (i = 0; i < ADT7475_PWM_COUNT; i++) {
+		if (i == 1 && !data->has_pwm2)
+			continue;
+		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);
+	}
 
-		for (i = 0; i < ADT7475_PWM_COUNT; i++) {
-			if (i == 1 && !data->has_pwm2)
-				continue;
-			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));
+
+	return 0;
+}
 
-		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));
+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);
+	int ret;
 
+	mutex_lock(&data->lock);
+
+	/* Measurement values update every 2 seconds */
+	if (time_after(jiffies, data->measure_updated + HZ * 2) ||
+	    !data->valid) {
+		ret = adt7475_update_measure(dev);
+		if (ret < 0) {
+			data->valid = 0;
+			mutex_unlock(&data->lock);
+			return data;
+		}
+		data->measure_updated = jiffies;
+	}
+
+	/* Limits and settings, should never change update every 60 seconds */
+	if (time_after(jiffies, data->limits_updated + HZ * 60) ||
+	    !data->valid) {
+		ret = adt7475_update_limits(dev);
+		if (ret < 0) {
+			data->valid = 0;
+			mutex_unlock(&data->lock);
+			return data;
+		}
 		data->limits_updated = jiffies;
 		data->valid = 1;
 	}
