3 files changed, 31 insertions, 7 deletions

diff --git a/src/drivers/i2c/nct7802y/chip.h b/src/drivers/i2c/nct7802y/chip.h
index 925dca1eae..03c464af82 100644
--- a/src/drivers/i2c/nct7802y/chip.h
+++ b/src/drivers/i2c/nct7802y/chip.h
@@ -7,6 +7,15 @@
 
 #define NCT7802Y_PECI_CNT	2
 #define NCT7802Y_FAN_CNT	3
+#define NCT7802Y_RTD_CNT	3
+
+/* Remote temperature diode sensors mode */
+enum nct7802y_rtd_mode {
+	RTD_CLOSED = 0,
+	RTD_CURRENT_MODE,
+	RTD_THERMISTOR_MODE,
+	RTD_VOLTAGE_MODE,
+};
 
 enum nct7802y_peci_mode {
 	PECI_DISABLED = 0,
@@ -53,6 +62,11 @@ enum nct7802y_temp_source {
 	TEMP_SOURCE_PROGRAMMABLE_1,
 };
 
+struct nct7802y_sensors_config {
+	bool local_enable;
+	enum nct7802y_rtd_mode rtd[NCT7802Y_RTD_CNT];
+};
+
 struct nct7802y_fan_smartconfig {
 	enum nct7802y_fan_smartmode mode;
 	enum nct7802y_fan_speed speed;
@@ -76,6 +90,7 @@ struct nct7802y_fan_config {
 struct drivers_i2c_nct7802y_config {
 	struct nct7802y_peci_config peci[NCT7802Y_PECI_CNT];
 	struct nct7802y_fan_config fan[NCT7802Y_FAN_CNT];
+	struct nct7802y_sensors_config sensors;
 	enum nct7802y_fan_pecierror on_pecierror;
 	u8 pecierror_minduty;
 };
diff --git a/src/drivers/i2c/nct7802y/nct7802y.h b/src/drivers/i2c/nct7802y/nct7802y.h
index aa07e7082e..d9b5878c67 100644
--- a/src/drivers/i2c/nct7802y/nct7802y.h
+++ b/src/drivers/i2c/nct7802y/nct7802y.h
@@ -11,6 +11,9 @@
 #define BANK_SELECT			0x00
 
 /* Bank 0 */
+#define MODE_SELECTION			0x22
+#define  MODE_SELECTION_LTD_EN		(1 << 6)
+#define  MODE_SELECTION_RTDx(x, val)	((val) << (x) * 2)
 
 #define PECI_ENABLE			0x23
 #define  PECI_ENABLE_AGENTx(x)		(1 << (x))
diff --git a/src/drivers/i2c/nct7802y/nct7802y_fan.c b/src/drivers/i2c/nct7802y/nct7802y_fan.c
index 7771b78808..a608802c7b 100644
--- a/src/drivers/i2c/nct7802y/nct7802y_fan.c
+++ b/src/drivers/i2c/nct7802y/nct7802y_fan.c
@@ -68,7 +68,7 @@ void nct7802y_init_fan(struct device *const dev)
 {
 	const struct drivers_i2c_nct7802y_config *const config = dev->chip_info;
 	unsigned int i;
-	u8 set;
+	u8 value;
 
 	if (nct7802y_select_bank(dev, 0) != CB_SUCCESS)
 		return;
@@ -78,21 +78,27 @@ void nct7802y_init_fan(struct device *const dev)
 			init_fan(dev, &config->fan[i], i);
 	}
 
+	value = 0;
+	for (i = 0; i < NCT7802Y_RTD_CNT; ++i)
+		value |= MODE_SELECTION_RTDx(i, config->sensors.rtd[i]);
+	if (config->sensors.local_enable)
+		value |= MODE_SELECTION_LTD_EN;
+	nct7802y_write(dev, MODE_SELECTION, value);
+
 	switch (config->on_pecierror) {
 	case PECI_ERROR_KEEP:
-		set = CLOSE_LOOP_FAN_PECI_ERR_CURR;
+		value = CLOSE_LOOP_FAN_PECI_ERR_CURR;
 		break;
 	case PECI_ERROR_VALUE:
-		set = CLOSE_LOOP_FAN_PECI_ERR_VALUE;
+		value = CLOSE_LOOP_FAN_PECI_ERR_VALUE;
 		break;
 	case PECI_ERROR_FULLSPEED:
-		set = CLOSE_LOOP_FAN_PECI_ERR_MAX;
+		value = CLOSE_LOOP_FAN_PECI_ERR_MAX;
 		break;
 	default:
-		set = 0;
+		value = 0;
 		break;
 	}
-	nct7802y_update(dev, CLOSE_LOOP_FAN_RPM_CTRL,
-			CLOSE_LOOP_FAN_PECI_ERR_MASK, set);
+	nct7802y_update(dev, CLOSE_LOOP_FAN_RPM_CTRL, CLOSE_LOOP_FAN_PECI_ERR_MASK, value);
 	nct7802y_write(dev, FAN_DUTY_ON_PECI_ERROR, config->pecierror_minduty);
 }