[v9,2/3] hwmon: (nct6775) Use nct6775_*() function pointers in nct6775_data.

Commit Message

Denis Pauk Sept. 17, 2021, 10:02 p.m. UTC

Prepare for platform specific callbacks usage:
* Use nct6775 function pointers in struct nct6775_data instead direct
  calls.

BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=204807
Signed-off-by: Denis Pauk <[e-mail]>
Co-developed-by: Bernhard Seibold <[e-mail]>
Signed-off-by: Bernhard Seibold <[e-mail]>
Cc: Andy Shevchenko <[e-mail]>
Cc: Guenter Roeck <[e-mail]>
Reviewed-by: Guenter Roeck <[e-mail]>
---
Changes in v9:
  - Without changes.

Changes in v8:
  - Without changes.

Changes in v7:
  - Without changes.
  
Changes in v6:
  - Split patch with replace direct calls to function pointers.

Changes in v5:
  - Without changes.

Changes in v4:
  - Fix naming conflict with inb, outb by add sio prefix to callbacks in
    nct6775_sio_data.

Changes in v3:
  - Use nct6775 function pointers in struct nct6775_data instead direct calls.
  - make function declarations one line.

Changes in v2:
  - Split changes to separate patches.
  - Rearrange code for directly use struct nct6775_sio_data in superio_*()
    functions.
---
 drivers/hwmon/nct6775.c | 283 ++++++++++++++++++++--------------------
 1 file changed, 143 insertions(+), 140 deletions(-)

Patch

diff --git a/drivers/hwmon/nct6775.c b/drivers/hwmon/nct6775.c
index 9b503c88e20d..4253eed7f5b0 100644
--- a/drivers/hwmon/nct6775.c
+++ b/drivers/hwmon/nct6775.c
@@ -1232,6 +1232,10 @@  struct nct6775_data {
 	u8 fandiv1;
 	u8 fandiv2;
 	u8 sio_reg_enable;
+
+	/* nct6775_*() callbacks  */
+	u16 (*read_value)(struct nct6775_data *data, u16 reg);
+	int (*write_value)(struct nct6775_data *data, u16 reg, u16 value);
 };
 
 struct sensor_device_template {
@@ -1471,7 +1475,7 @@  static u16 nct6775_read_temp(struct nct6775_data *data, u16 reg)
 {
 	u16 res;
 
-	res = nct6775_read_value(data, reg);
+	res = data->read_value(data, reg);
 	if (!is_word_sized(data, reg))
 		res <<= 8;
 
@@ -1482,7 +1486,7 @@  static int nct6775_write_temp(struct nct6775_data *data, u16 reg, u16 value)
 {
 	if (!is_word_sized(data, reg))
 		value >>= 8;
-	return nct6775_write_value(data, reg, value);
+	return data->write_value(data, reg, value);
 }
 
 /* This function assumes that the caller holds data->update_lock */
@@ -1492,24 +1496,24 @@  static void nct6775_write_fan_div(struct nct6775_data *data, int nr)
 
 	switch (nr) {
 	case 0:
-		reg = (nct6775_read_value(data, NCT6775_REG_FANDIV1) & 0x70)
+		reg = (data->read_value(data, NCT6775_REG_FANDIV1) & 0x70)
 		    | (data->fan_div[0] & 0x7);
-		nct6775_write_value(data, NCT6775_REG_FANDIV1, reg);
+		data->write_value(data, NCT6775_REG_FANDIV1, reg);
 		break;
 	case 1:
-		reg = (nct6775_read_value(data, NCT6775_REG_FANDIV1) & 0x7)
+		reg = (data->read_value(data, NCT6775_REG_FANDIV1) & 0x7)
 		    | ((data->fan_div[1] << 4) & 0x70);
-		nct6775_write_value(data, NCT6775_REG_FANDIV1, reg);
+		data->write_value(data, NCT6775_REG_FANDIV1, reg);
 		break;
 	case 2:
-		reg = (nct6775_read_value(data, NCT6775_REG_FANDIV2) & 0x70)
+		reg = (data->read_value(data, NCT6775_REG_FANDIV2) & 0x70)
 		    | (data->fan_div[2] & 0x7);
-		nct6775_write_value(data, NCT6775_REG_FANDIV2, reg);
+		data->write_value(data, NCT6775_REG_FANDIV2, reg);
 		break;
 	case 3:
-		reg = (nct6775_read_value(data, NCT6775_REG_FANDIV2) & 0x7)
+		reg = (data->read_value(data, NCT6775_REG_FANDIV2) & 0x7)
 		    | ((data->fan_div[3] << 4) & 0x70);
-		nct6775_write_value(data, NCT6775_REG_FANDIV2, reg);
+		data->write_value(data, NCT6775_REG_FANDIV2, reg);
 		break;
 	}
 }
@@ -1524,10 +1528,10 @@  static void nct6775_update_fan_div(struct nct6775_data *data)
 {
 	u8 i;
 
-	i = nct6775_read_value(data, NCT6775_REG_FANDIV1);
+	i = data->read_value(data, NCT6775_REG_FANDIV1);
 	data->fan_div[0] = i & 0x7;
 	data->fan_div[1] = (i & 0x70) >> 4;
-	i = nct6775_read_value(data, NCT6775_REG_FANDIV2);
+	i = data->read_value(data, NCT6775_REG_FANDIV2);
 	data->fan_div[2] = i & 0x7;
 	if (data->has_fan & BIT(3))
 		data->fan_div[3] = (i & 0x70) >> 4;
@@ -1575,11 +1579,11 @@  static void nct6775_init_fan_common(struct device *dev,
 	 */
 	for (i = 0; i < ARRAY_SIZE(data->fan_min); i++) {
 		if (data->has_fan_min & BIT(i)) {
-			reg = nct6775_read_value(data, data->REG_FAN_MIN[i]);
+			reg = data->read_value(data, data->REG_FAN_MIN[i]);
 			if (!reg)
-				nct6775_write_value(data, data->REG_FAN_MIN[i],
-						    data->has_fan_div ? 0xff
-								      : 0xff1f);
+				data->write_value(data, data->REG_FAN_MIN[i],
+						  data->has_fan_div ? 0xff
+								    : 0xff1f);
 		}
 	}
 }
@@ -1623,8 +1627,8 @@  static void nct6775_select_fan_div(struct device *dev,
 			}
 			if (fan_min != data->fan_min[nr]) {
 				data->fan_min[nr] = fan_min;
-				nct6775_write_value(data, data->REG_FAN_MIN[nr],
-						    fan_min);
+				data->write_value(data, data->REG_FAN_MIN[nr],
+						  fan_min);
 			}
 		}
 		data->fan_div[nr] = fan_div;
@@ -1644,16 +1648,15 @@  static void nct6775_update_pwm(struct device *dev)
 			continue;
 
 		duty_is_dc = data->REG_PWM_MODE[i] &&
-		  (nct6775_read_value(data, data->REG_PWM_MODE[i])
+		  (data->read_value(data, data->REG_PWM_MODE[i])
 		   & data->PWM_MODE_MASK[i]);
 		data->pwm_mode[i] = !duty_is_dc;
 
-		fanmodecfg = nct6775_read_value(data, data->REG_FAN_MODE[i]);
+		fanmodecfg = data->read_value(data, data->REG_FAN_MODE[i]);
 		for (j = 0; j < ARRAY_SIZE(data->REG_PWM); j++) {
 			if (data->REG_PWM[j] && data->REG_PWM[j][i]) {
-				data->pwm[j][i]
-				  = nct6775_read_value(data,
-						       data->REG_PWM[j][i]);
+				data->pwm[j][i] = data->read_value(data,
+								   data->REG_PWM[j][i]);
 			}
 		}
 
@@ -1668,17 +1671,17 @@  static void nct6775_update_pwm(struct device *dev)
 			u8 t = fanmodecfg & 0x0f;
 
 			if (data->REG_TOLERANCE_H) {
-				t |= (nct6775_read_value(data,
+				t |= (data->read_value(data,
 				      data->REG_TOLERANCE_H[i]) & 0x70) >> 1;
 			}
 			data->target_speed_tolerance[i] = t;
 		}
 
 		data->temp_tolerance[1][i] =
-			nct6775_read_value(data,
-					data->REG_CRITICAL_TEMP_TOLERANCE[i]);
+			data->read_value(data,
+					 data->REG_CRITICAL_TEMP_TOLERANCE[i]);
 
-		reg = nct6775_read_value(data, data->REG_TEMP_SEL[i]);
+		reg = data->read_value(data, data->REG_TEMP_SEL[i]);
 		data->pwm_temp_sel[i] = reg & 0x1f;
 		/* If fan can stop, report floor as 0 */
 		if (reg & 0x80)
@@ -1687,7 +1690,7 @@  static void nct6775_update_pwm(struct device *dev)
 		if (!data->REG_WEIGHT_TEMP_SEL[i])
 			continue;
 
-		reg = nct6775_read_value(data, data->REG_WEIGHT_TEMP_SEL[i]);
+		reg = data->read_value(data, data->REG_WEIGHT_TEMP_SEL[i]);
 		data->pwm_weight_temp_sel[i] = reg & 0x1f;
 		/* If weight is disabled, report weight source as 0 */
 		if (!(reg & 0x80))
@@ -1695,9 +1698,8 @@  static void nct6775_update_pwm(struct device *dev)
 
 		/* Weight temp data */
 		for (j = 0; j < ARRAY_SIZE(data->weight_temp); j++) {
-			data->weight_temp[j][i]
-			  = nct6775_read_value(data,
-					       data->REG_WEIGHT_TEMP[j][i]);
+			data->weight_temp[j][i] = data->read_value(data,
+								   data->REG_WEIGHT_TEMP[j][i]);
 		}
 	}
 }
@@ -1715,10 +1717,10 @@  static void nct6775_update_pwm_limits(struct device *dev)
 
 		for (j = 0; j < ARRAY_SIZE(data->fan_time); j++) {
 			data->fan_time[j][i] =
-			  nct6775_read_value(data, data->REG_FAN_TIME[j][i]);
+			  data->read_value(data, data->REG_FAN_TIME[j][i]);
 		}
 
-		reg_t = nct6775_read_value(data, data->REG_TARGET[i]);
+		reg_t = data->read_value(data, data->REG_TARGET[i]);
 		/* Update only in matching mode or if never updated */
 		if (!data->target_temp[i] ||
 		    data->pwm_enable[i] == thermal_cruise)
@@ -1726,7 +1728,7 @@  static void nct6775_update_pwm_limits(struct device *dev)
 		if (!data->target_speed[i] ||
 		    data->pwm_enable[i] == speed_cruise) {
 			if (data->REG_TOLERANCE_H) {
-				reg_t |= (nct6775_read_value(data,
+				reg_t |= (data->read_value(data,
 					data->REG_TOLERANCE_H[i]) & 0x0f) << 8;
 			}
 			data->target_speed[i] = reg_t;
@@ -1734,21 +1736,21 @@  static void nct6775_update_pwm_limits(struct device *dev)
 
 		for (j = 0; j < data->auto_pwm_num; j++) {
 			data->auto_pwm[i][j] =
-			  nct6775_read_value(data,
-					     NCT6775_AUTO_PWM(data, i, j));
+			  data->read_value(data,
+					   NCT6775_AUTO_PWM(data, i, j));
 			data->auto_temp[i][j] =
-			  nct6775_read_value(data,
-					     NCT6775_AUTO_TEMP(data, i, j));
+			  data->read_value(data,
+					   NCT6775_AUTO_TEMP(data, i, j));
 		}
 
 		/* critical auto_pwm temperature data */
 		data->auto_temp[i][data->auto_pwm_num] =
-			nct6775_read_value(data, data->REG_CRITICAL_TEMP[i]);
+			data->read_value(data, data->REG_CRITICAL_TEMP[i]);
 
 		switch (data->kind) {
 		case nct6775:
-			reg = nct6775_read_value(data,
-						 NCT6775_REG_CRITICAL_ENAB[i]);
+			reg = data->read_value(data,
+					       NCT6775_REG_CRITICAL_ENAB[i]);
 			data->auto_pwm[i][data->auto_pwm_num] =
 						(reg & 0x02) ? 0xff : 0x00;
 			break;
@@ -1765,10 +1767,10 @@  static void nct6775_update_pwm_limits(struct device *dev)
 		case nct6796:
 		case nct6797:
 		case nct6798:
-			reg = nct6775_read_value(data,
+			reg = data->read_value(data,
 					data->REG_CRITICAL_PWM_ENABLE[i]);
 			if (reg & data->CRITICAL_PWM_ENABLE_MASK)
-				reg = nct6775_read_value(data,
+				reg = data->read_value(data,
 					data->REG_CRITICAL_PWM[i]);
 			else
 				reg = 0xff;
@@ -1795,11 +1797,11 @@  static struct nct6775_data *nct6775_update_device(struct device *dev)
 			if (!(data->have_in & BIT(i)))
 				continue;
 
-			data->in[i][0] = nct6775_read_value(data,
-							    data->REG_VIN[i]);
-			data->in[i][1] = nct6775_read_value(data,
+			data->in[i][0] = data->read_value(data,
+							  data->REG_VIN[i]);
+			data->in[i][1] = data->read_value(data,
 					  data->REG_IN_MINMAX[0][i]);
-			data->in[i][2] = nct6775_read_value(data,
+			data->in[i][2] = data->read_value(data,
 					  data->REG_IN_MINMAX[1][i]);
 		}
 
@@ -1810,18 +1812,18 @@  static struct nct6775_data *nct6775_update_device(struct device *dev)
 			if (!(data->has_fan & BIT(i)))
 				continue;
 
-			reg = nct6775_read_value(data, data->REG_FAN[i]);
+			reg = data->read_value(data, data->REG_FAN[i]);
 			data->rpm[i] = data->fan_from_reg(reg,
 							  data->fan_div[i]);
 
 			if (data->has_fan_min & BIT(i))
-				data->fan_min[i] = nct6775_read_value(data,
+				data->fan_min[i] = data->read_value(data,
 					   data->REG_FAN_MIN[i]);
 
 			if (data->REG_FAN_PULSES[i]) {
 				data->fan_pulses[i] =
-				  (nct6775_read_value(data,
-						      data->REG_FAN_PULSES[i])
+				  (data->read_value(data,
+						    data->REG_FAN_PULSES[i])
 				   >> data->FAN_PULSE_SHIFT[i]) & 0x03;
 			}
 
@@ -1837,15 +1839,14 @@  static struct nct6775_data *nct6775_update_device(struct device *dev)
 				continue;
 			for (j = 0; j < ARRAY_SIZE(data->reg_temp); j++) {
 				if (data->reg_temp[j][i])
-					data->temp[j][i]
-					  = nct6775_read_temp(data,
-						data->reg_temp[j][i]);
+					data->temp[j][i] = nct6775_read_temp(data,
+									     data->reg_temp[j][i]);
 			}
 			if (i >= NUM_TEMP_FIXED ||
 			    !(data->have_temp_fixed & BIT(i)))
 				continue;
-			data->temp_offset[i]
-			  = nct6775_read_value(data, data->REG_TEMP_OFFSET[i]);
+			data->temp_offset[i] = data->read_value(data,
+								   data->REG_TEMP_OFFSET[i]);
 		}
 
 		data->alarms = 0;
@@ -1854,7 +1855,7 @@  static struct nct6775_data *nct6775_update_device(struct device *dev)
 
 			if (!data->REG_ALARM[i])
 				continue;
-			alarm = nct6775_read_value(data, data->REG_ALARM[i]);
+			alarm = data->read_value(data, data->REG_ALARM[i]);
 			data->alarms |= ((u64)alarm) << (i << 3);
 		}
 
@@ -1864,7 +1865,7 @@  static struct nct6775_data *nct6775_update_device(struct device *dev)
 
 			if (!data->REG_BEEP[i])
 				continue;
-			beep = nct6775_read_value(data, data->REG_BEEP[i]);
+			beep = data->read_value(data, data->REG_BEEP[i]);
 			data->beeps |= ((u64)beep) << (i << 3);
 		}
 
@@ -1906,8 +1907,8 @@  store_in_reg(struct device *dev, struct device_attribute *attr, const char *buf,
 		return err;
 	mutex_lock(&data->update_lock);
 	data->in[nr][index] = in_to_reg(val, nr);
-	nct6775_write_value(data, data->REG_IN_MINMAX[index - 1][nr],
-			    data->in[nr][index]);
+	data->write_value(data, data->REG_IN_MINMAX[index - 1][nr],
+			  data->in[nr][index]);
 	mutex_unlock(&data->update_lock);
 	return count;
 }
@@ -1931,8 +1932,8 @@  static int find_temp_source(struct nct6775_data *data, int index, int count)
 	for (nr = 0; nr < count; nr++) {
 		int src;
 
-		src = nct6775_read_value(data,
-					 data->REG_TEMP_SOURCE[nr]) & 0x1f;
+		src = data->read_value(data,
+				       data->REG_TEMP_SOURCE[nr]) & 0x1f;
 		if (src == source)
 			return nr;
 	}
@@ -1993,8 +1994,8 @@  store_beep(struct device *dev, struct device_attribute *attr, const char *buf,
 		data->beeps |= (1ULL << nr);
 	else
 		data->beeps &= ~(1ULL << nr);
-	nct6775_write_value(data, data->REG_BEEP[regindex],
-			    (data->beeps >> (regindex << 3)) & 0xff);
+	data->write_value(data, data->REG_BEEP[regindex],
+			  (data->beeps >> (regindex << 3)) & 0xff);
 	mutex_unlock(&data->update_lock);
 	return count;
 }
@@ -2049,8 +2050,8 @@  store_temp_beep(struct device *dev, struct device_attribute *attr,
 		data->beeps |= (1ULL << bit);
 	else
 		data->beeps &= ~(1ULL << bit);
-	nct6775_write_value(data, data->REG_BEEP[regindex],
-			    (data->beeps >> (regindex << 3)) & 0xff);
+	data->write_value(data, data->REG_BEEP[regindex],
+			  (data->beeps >> (regindex << 3)) & 0xff);
 	mutex_unlock(&data->update_lock);
 
 	return count;
@@ -2217,7 +2218,7 @@  store_fan_min(struct device *dev, struct device_attribute *attr,
 	}
 
 write_min:
-	nct6775_write_value(data, data->REG_FAN_MIN[nr], data->fan_min[nr]);
+	data->write_value(data, data->REG_FAN_MIN[nr], data->fan_min[nr]);
 	mutex_unlock(&data->update_lock);
 
 	return count;
@@ -2253,10 +2254,10 @@  store_fan_pulses(struct device *dev, struct device_attribute *attr,
 
 	mutex_lock(&data->update_lock);
 	data->fan_pulses[nr] = val & 3;
-	reg = nct6775_read_value(data, data->REG_FAN_PULSES[nr]);
+	reg = data->read_value(data, data->REG_FAN_PULSES[nr]);
 	reg &= ~(0x03 << data->FAN_PULSE_SHIFT[nr]);
 	reg |= (val & 3) << data->FAN_PULSE_SHIFT[nr];
-	nct6775_write_value(data, data->REG_FAN_PULSES[nr], reg);
+	data->write_value(data, data->REG_FAN_PULSES[nr], reg);
 	mutex_unlock(&data->update_lock);
 
 	return count;
@@ -2390,7 +2391,7 @@  store_temp_offset(struct device *dev, struct device_attribute *attr,
 
 	mutex_lock(&data->update_lock);
 	data->temp_offset[nr] = val;
-	nct6775_write_value(data, data->REG_TEMP_OFFSET[nr], val);
+	data->write_value(data, data->REG_TEMP_OFFSET[nr], val);
 	mutex_unlock(&data->update_lock);
 
 	return count;
@@ -2429,8 +2430,8 @@  store_temp_type(struct device *dev, struct device_attribute *attr,
 	data->temp_type[nr] = val;
 	vbit = 0x02 << nr;
 	dbit = data->DIODE_MASK << nr;
-	vbat = nct6775_read_value(data, data->REG_VBAT) & ~vbit;
-	diode = nct6775_read_value(data, data->REG_DIODE) & ~dbit;
+	vbat = data->read_value(data, data->REG_VBAT) & ~vbit;
+	diode = data->read_value(data, data->REG_DIODE) & ~dbit;
 	switch (val) {
 	case 1:	/* CPU diode (diode, current mode) */
 		vbat |= vbit;
@@ -2442,8 +2443,8 @@  store_temp_type(struct device *dev, struct device_attribute *attr,
 	case 4:	/* thermistor */
 		break;
 	}
-	nct6775_write_value(data, data->REG_VBAT, vbat);
-	nct6775_write_value(data, data->REG_DIODE, diode);
+	data->write_value(data, data->REG_VBAT, vbat);
+	data->write_value(data, data->REG_DIODE, diode);
 
 	mutex_unlock(&data->update_lock);
 	return count;
@@ -2567,11 +2568,11 @@  store_pwm_mode(struct device *dev, struct device_attribute *attr,
 
 	mutex_lock(&data->update_lock);
 	data->pwm_mode[nr] = val;
-	reg = nct6775_read_value(data, data->REG_PWM_MODE[nr]);
+	reg = data->read_value(data, data->REG_PWM_MODE[nr]);
 	reg &= ~data->PWM_MODE_MASK[nr];
 	if (!val)
 		reg |= data->PWM_MODE_MASK[nr];
-	nct6775_write_value(data, data->REG_PWM_MODE[nr], reg);
+	data->write_value(data, data->REG_PWM_MODE[nr], reg);
 	mutex_unlock(&data->update_lock);
 	return count;
 }
@@ -2590,7 +2591,7 @@  show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
 	 * Otherwise, show the configured value.
 	 */
 	if (index == 0 && data->pwm_enable[nr] > manual)
-		pwm = nct6775_read_value(data, data->REG_PWM_READ[nr]);
+		pwm = data->read_value(data, data->REG_PWM_READ[nr]);
 	else
 		pwm = data->pwm[index][nr];
 
@@ -2619,13 +2620,13 @@  store_pwm(struct device *dev, struct device_attribute *attr, const char *buf,
 
 	mutex_lock(&data->update_lock);
 	data->pwm[index][nr] = val;
-	nct6775_write_value(data, data->REG_PWM[index][nr], val);
+	data->write_value(data, data->REG_PWM[index][nr], val);
 	if (index == 2)	{ /* floor: disable if val == 0 */
-		reg = nct6775_read_value(data, data->REG_TEMP_SEL[nr]);
+		reg = data->read_value(data, data->REG_TEMP_SEL[nr]);
 		reg &= 0x7f;
 		if (val)
 			reg |= 0x80;
-		nct6775_write_value(data, data->REG_TEMP_SEL[nr], reg);
+		data->write_value(data, data->REG_TEMP_SEL[nr], reg);
 	}
 	mutex_unlock(&data->update_lock);
 	return count;
@@ -2664,29 +2665,29 @@  static void pwm_update_registers(struct nct6775_data *data, int nr)
 	case manual:
 		break;
 	case speed_cruise:
-		reg = nct6775_read_value(data, data->REG_FAN_MODE[nr]);
+		reg = data->read_value(data, data->REG_FAN_MODE[nr]);
 		reg = (reg & ~data->tolerance_mask) |
 		  (data->target_speed_tolerance[nr] & data->tolerance_mask);
-		nct6775_write_value(data, data->REG_FAN_MODE[nr], reg);
-		nct6775_write_value(data, data->REG_TARGET[nr],
+		data->write_value(data, data->REG_FAN_MODE[nr], reg);
+		data->write_value(data, data->REG_TARGET[nr],
 				    data->target_speed[nr] & 0xff);
 		if (data->REG_TOLERANCE_H) {
 			reg = (data->target_speed[nr] >> 8) & 0x0f;
 			reg |= (data->target_speed_tolerance[nr] & 0x38) << 1;
-			nct6775_write_value(data,
-					    data->REG_TOLERANCE_H[nr],
-					    reg);
+			data->write_value(data,
+					  data->REG_TOLERANCE_H[nr],
+					  reg);
 		}
 		break;
 	case thermal_cruise:
-		nct6775_write_value(data, data->REG_TARGET[nr],
-				    data->target_temp[nr]);
+		data->write_value(data, data->REG_TARGET[nr],
+				  data->target_temp[nr]);
 		fallthrough;
 	default:
-		reg = nct6775_read_value(data, data->REG_FAN_MODE[nr]);
+		reg = data->read_value(data, data->REG_FAN_MODE[nr]);
 		reg = (reg & ~data->tolerance_mask) |
 		  data->temp_tolerance[0][nr];
-		nct6775_write_value(data, data->REG_FAN_MODE[nr], reg);
+		data->write_value(data, data->REG_FAN_MODE[nr], reg);
 		break;
 	}
 }
@@ -2734,13 +2735,13 @@  store_pwm_enable(struct device *dev, struct device_attribute *attr,
 		 * turn off pwm control: select manual mode, set pwm to maximum
 		 */
 		data->pwm[0][nr] = 255;
-		nct6775_write_value(data, data->REG_PWM[0][nr], 255);
+		data->write_value(data, data->REG_PWM[0][nr], 255);
 	}
 	pwm_update_registers(data, nr);
-	reg = nct6775_read_value(data, data->REG_FAN_MODE[nr]);
+	reg = data->read_value(data, data->REG_FAN_MODE[nr]);
 	reg &= 0x0f;
 	reg |= pwm_enable_to_reg(val) << 4;
-	nct6775_write_value(data, data->REG_FAN_MODE[nr], reg);
+	data->write_value(data, data->REG_FAN_MODE[nr], reg);
 	mutex_unlock(&data->update_lock);
 	return count;
 }
@@ -2793,10 +2794,10 @@  store_pwm_temp_sel(struct device *dev, struct device_attribute *attr,
 	mutex_lock(&data->update_lock);
 	src = data->temp_src[val - 1];
 	data->pwm_temp_sel[nr] = src;
-	reg = nct6775_read_value(data, data->REG_TEMP_SEL[nr]);
+	reg = data->read_value(data, data->REG_TEMP_SEL[nr]);
 	reg &= 0xe0;
 	reg |= src;
-	nct6775_write_value(data, data->REG_TEMP_SEL[nr], reg);
+	data->write_value(data, data->REG_TEMP_SEL[nr], reg);
 	mutex_unlock(&data->update_lock);
 
 	return count;
@@ -2838,15 +2839,15 @@  store_pwm_weight_temp_sel(struct device *dev, struct device_attribute *attr,
 	if (val) {
 		src = data->temp_src[val - 1];
 		data->pwm_weight_temp_sel[nr] = src;
-		reg = nct6775_read_value(data, data->REG_WEIGHT_TEMP_SEL[nr]);
+		reg = data->read_value(data, data->REG_WEIGHT_TEMP_SEL[nr]);
 		reg &= 0xe0;
 		reg |= (src | 0x80);
-		nct6775_write_value(data, data->REG_WEIGHT_TEMP_SEL[nr], reg);
+		data->write_value(data, data->REG_WEIGHT_TEMP_SEL[nr], reg);
 	} else {
 		data->pwm_weight_temp_sel[nr] = 0;
-		reg = nct6775_read_value(data, data->REG_WEIGHT_TEMP_SEL[nr]);
+		reg = data->read_value(data, data->REG_WEIGHT_TEMP_SEL[nr]);
 		reg &= 0x7f;
-		nct6775_write_value(data, data->REG_WEIGHT_TEMP_SEL[nr], reg);
+		data->write_value(data, data->REG_WEIGHT_TEMP_SEL[nr], reg);
 	}
 	mutex_unlock(&data->update_lock);
 
@@ -2958,9 +2959,9 @@  store_temp_tolerance(struct device *dev, struct device_attribute *attr,
 	if (index)
 		pwm_update_registers(data, nr);
 	else
-		nct6775_write_value(data,
-				    data->REG_CRITICAL_TEMP_TOLERANCE[nr],
-				    val);
+		data->write_value(data,
+				  data->REG_CRITICAL_TEMP_TOLERANCE[nr],
+				  val);
 	mutex_unlock(&data->update_lock);
 	return count;
 }
@@ -3083,7 +3084,7 @@  store_weight_temp(struct device *dev, struct device_attribute *attr,
 
 	mutex_lock(&data->update_lock);
 	data->weight_temp[index][nr] = val;
-	nct6775_write_value(data, data->REG_WEIGHT_TEMP[index][nr], val);
+	data->write_value(data, data->REG_WEIGHT_TEMP[index][nr], val);
 	mutex_unlock(&data->update_lock);
 	return count;
 }
@@ -3132,7 +3133,7 @@  store_fan_time(struct device *dev, struct device_attribute *attr,
 	val = step_time_to_reg(val, data->pwm_mode[nr]);
 	mutex_lock(&data->update_lock);
 	data->fan_time[index][nr] = val;
-	nct6775_write_value(data, data->REG_FAN_TIME[index][nr], val);
+	data->write_value(data, data->REG_FAN_TIME[index][nr], val);
 	mutex_unlock(&data->update_lock);
 	return count;
 }
@@ -3174,21 +3175,21 @@  store_auto_pwm(struct device *dev, struct device_attribute *attr,
 	mutex_lock(&data->update_lock);
 	data->auto_pwm[nr][point] = val;
 	if (point < data->auto_pwm_num) {
-		nct6775_write_value(data,
+		data->write_value(data,
 				    NCT6775_AUTO_PWM(data, nr, point),
 				    data->auto_pwm[nr][point]);
 	} else {
 		switch (data->kind) {
 		case nct6775:
 			/* disable if needed (pwm == 0) */
-			reg = nct6775_read_value(data,
-						 NCT6775_REG_CRITICAL_ENAB[nr]);
+			reg = data->read_value(data,
+					       NCT6775_REG_CRITICAL_ENAB[nr]);
 			if (val)
 				reg |= 0x02;
 			else
 				reg &= ~0x02;
-			nct6775_write_value(data, NCT6775_REG_CRITICAL_ENAB[nr],
-					    reg);
+			data->write_value(data, NCT6775_REG_CRITICAL_ENAB[nr],
+					  reg);
 			break;
 		case nct6776:
 			break; /* always enabled, nothing to do */
@@ -3202,17 +3203,17 @@  store_auto_pwm(struct device *dev, struct device_attribute *attr,
 		case nct6796:
 		case nct6797:
 		case nct6798:
-			nct6775_write_value(data, data->REG_CRITICAL_PWM[nr],
+			data->write_value(data, data->REG_CRITICAL_PWM[nr],
 					    val);
-			reg = nct6775_read_value(data,
+			reg = data->read_value(data,
 					data->REG_CRITICAL_PWM_ENABLE[nr]);
 			if (val == 255)
 				reg &= ~data->CRITICAL_PWM_ENABLE_MASK;
 			else
 				reg |= data->CRITICAL_PWM_ENABLE_MASK;
-			nct6775_write_value(data,
-					    data->REG_CRITICAL_PWM_ENABLE[nr],
-					    reg);
+			data->write_value(data,
+					  data->REG_CRITICAL_PWM_ENABLE[nr],
+					  reg);
 			break;
 		}
 	}
@@ -3255,11 +3256,11 @@  store_auto_temp(struct device *dev, struct device_attribute *attr,
 	mutex_lock(&data->update_lock);
 	data->auto_temp[nr][point] = DIV_ROUND_CLOSEST(val, 1000);
 	if (point < data->auto_pwm_num) {
-		nct6775_write_value(data,
+		data->write_value(data,
 				    NCT6775_AUTO_TEMP(data, nr, point),
 				    data->auto_temp[nr][point]);
 	} else {
-		nct6775_write_value(data, data->REG_CRITICAL_TEMP[nr],
+		data->write_value(data, data->REG_CRITICAL_TEMP[nr],
 				    data->auto_temp[nr][point]);
 	}
 	mutex_unlock(&data->update_lock);
@@ -3519,9 +3520,9 @@  static inline void nct6775_init_device(struct nct6775_data *data)
 
 	/* Start monitoring if needed */
 	if (data->REG_CONFIG) {
-		tmp = nct6775_read_value(data, data->REG_CONFIG);
+		tmp = data->read_value(data, data->REG_CONFIG);
 		if (!(tmp & 0x01))
-			nct6775_write_value(data, data->REG_CONFIG, tmp | 0x01);
+			data->write_value(data, data->REG_CONFIG, tmp | 0x01);
 	}
 
 	/* Enable temperature sensors if needed */
@@ -3530,18 +3531,18 @@  static inline void nct6775_init_device(struct nct6775_data *data)
 			continue;
 		if (!data->reg_temp_config[i])
 			continue;
-		tmp = nct6775_read_value(data, data->reg_temp_config[i]);
+		tmp = data->read_value(data, data->reg_temp_config[i]);
 		if (tmp & 0x01)
-			nct6775_write_value(data, data->reg_temp_config[i],
+			data->write_value(data, data->reg_temp_config[i],
 					    tmp & 0xfe);
 	}
 
 	/* Enable VBAT monitoring if needed */
-	tmp = nct6775_read_value(data, data->REG_VBAT);
+	tmp = data->read_value(data, data->REG_VBAT);
 	if (!(tmp & 0x01))
-		nct6775_write_value(data, data->REG_VBAT, tmp | 0x01);
+		data->write_value(data, data->REG_VBAT, tmp | 0x01);
 
-	diode = nct6775_read_value(data, data->REG_DIODE);
+	diode = data->read_value(data, data->REG_DIODE);
 
 	for (i = 0; i < data->temp_fixed_num; i++) {
 		if (!(data->have_temp_fixed & BIT(i)))
@@ -3786,7 +3787,7 @@  static void add_temp_sensors(struct nct6775_data *data, const u16 *regp,
 
 		if (!regp[i])
 			continue;
-		src = nct6775_read_value(data, regp[i]);
+		src = data->read_value(data, regp[i]);
 		src &= 0x1f;
 		if (!src || (*mask & BIT(src)))
 			continue;
@@ -3794,7 +3795,7 @@  static void add_temp_sensors(struct nct6775_data *data, const u16 *regp,
 			continue;
 
 		index = __ffs(*available);
-		nct6775_write_value(data, data->REG_TEMP_SOURCE[index], src);
+		data->write_value(data, data->REG_TEMP_SOURCE[index], src);
 		*available &= ~BIT(index);
 		*mask |= BIT(src);
 	}
@@ -3830,6 +3831,8 @@  static int nct6775_probe(struct platform_device *pdev)
 	data->kind = sio_data->kind;
 	data->sioreg = sio_data->sioreg;
 	data->addr = res->start;
+	data->read_value = nct6775_read_value;
+	data->write_value = nct6775_write_value;
 	mutex_init(&data->update_lock);
 	data->name = nct6775_device_names[data->kind];
 	data->bank = 0xff;		/* Force initial bank selection */
@@ -4349,7 +4352,7 @@  static int nct6775_probe(struct platform_device *pdev)
 		if (reg_temp[i] == 0)
 			continue;
 
-		src = nct6775_read_value(data, data->REG_TEMP_SOURCE[i]) & 0x1f;
+		src = data->read_value(data, data->REG_TEMP_SOURCE[i]) & 0x1f;
 		if (!src || (mask & BIT(src)))
 			available |= BIT(i);
 
@@ -4369,7 +4372,7 @@  static int nct6775_probe(struct platform_device *pdev)
 		if (reg_temp[i] == 0)
 			continue;
 
-		src = nct6775_read_value(data, data->REG_TEMP_SOURCE[i]) & 0x1f;
+		src = data->read_value(data, data->REG_TEMP_SOURCE[i]) & 0x1f;
 		if (!src || (mask & BIT(src)))
 			continue;
 
@@ -4429,7 +4432,7 @@  static int nct6775_probe(struct platform_device *pdev)
 		if (reg_temp_mon[i] == 0)
 			continue;
 
-		src = nct6775_read_value(data, data->REG_TEMP_SEL[i]) & 0x1f;
+		src = data->read_value(data, data->REG_TEMP_SEL[i]) & 0x1f;
 		if (!src)
 			continue;
 
@@ -4642,10 +4645,10 @@  static int __maybe_unused nct6775_suspend(struct device *dev)
 	struct nct6775_data *data = nct6775_update_device(dev);
 
 	mutex_lock(&data->update_lock);
-	data->vbat = nct6775_read_value(data, data->REG_VBAT);
+	data->vbat = data->read_value(data, data->REG_VBAT);
 	if (data->kind == nct6775) {
-		data->fandiv1 = nct6775_read_value(data, NCT6775_REG_FANDIV1);
-		data->fandiv2 = nct6775_read_value(data, NCT6775_REG_FANDIV2);
+		data->fandiv1 = data->read_value(data, NCT6775_REG_FANDIV1);
+		data->fandiv2 = data->read_value(data, NCT6775_REG_FANDIV2);
 	}
 	mutex_unlock(&data->update_lock);
 
@@ -4684,18 +4687,18 @@  static int __maybe_unused nct6775_resume(struct device *dev)
 		if (!(data->have_in & BIT(i)))
 			continue;
 
-		nct6775_write_value(data, data->REG_IN_MINMAX[0][i],
-				    data->in[i][1]);
-		nct6775_write_value(data, data->REG_IN_MINMAX[1][i],
-				    data->in[i][2]);
+		data->write_value(data, data->REG_IN_MINMAX[0][i],
+				  data->in[i][1]);
+		data->write_value(data, data->REG_IN_MINMAX[1][i],
+				  data->in[i][2]);
 	}
 
 	for (i = 0; i < ARRAY_SIZE(data->fan_min); i++) {
 		if (!(data->has_fan_min & BIT(i)))
 			continue;
 
-		nct6775_write_value(data, data->REG_FAN_MIN[i],
-				    data->fan_min[i]);
+		data->write_value(data, data->REG_FAN_MIN[i],
+				  data->fan_min[i]);
 	}
 
 	for (i = 0; i < NUM_TEMP; i++) {
@@ -4709,10 +4712,10 @@  static int __maybe_unused nct6775_resume(struct device *dev)
 	}
 
 	/* Restore other settings */
-	nct6775_write_value(data, data->REG_VBAT, data->vbat);
+	data->write_value(data, data->REG_VBAT, data->vbat);
 	if (data->kind == nct6775) {
-		nct6775_write_value(data, NCT6775_REG_FANDIV1, data->fandiv1);
-		nct6775_write_value(data, NCT6775_REG_FANDIV2, data->fandiv2);
+		data->write_value(data, NCT6775_REG_FANDIV1, data->fandiv1);
+		data->write_value(data, NCT6775_REG_FANDIV2, data->fandiv2);
 	}
 
 abort: