hwmon: Driver for MAX31730

MAX31730 is a 3-Channel Remote Temperature Sensor.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Documentation/hwmon/index.rst

@@ -108,6 +108,7 @@ Hardware Monitoring Kernel Drivers
    max197
    max20751
    max31722
+   max31730
    max31785
    max31790
    max34440

Documentation/hwmon/max31730.rst

@@ -0,0 +1,44 @@
+Kernel driver max31790
+======================
+
+Supported chips:
+
+  * Maxim MAX31730
+
+    Prefix: 'max31730'
+
+    Addresses scanned: 0x1c, 0x1d, 0x1e, 0x1f, 0x4c, 0x4d, 0x4e, 0x4f
+
+    Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX31730.pdf
+
+Author: Guenter Roeck <linux@roeck-us.net>
+
+
+Description
+-----------
+
+This driver implements support for Maxim MAX31730.
+
+The MAX31730 temperature sensor monitors its own temperature and the
+temperatures of three external diode-connected transistors. The operating
+supply voltage is from 3.0V to 3.6V. Resistance cancellation compensates
+for high series resistance in circuit-board traces and the external thermal
+diode, while beta compensation corrects for temperature-measurement
+errors due to low-beta sensing transistors.
+
+
+Sysfs entries
+-------------
+
+=================== == =======================================================
+temp[1-4]_enable    RW Temperature enable/disable
+                       Set to 0 to enable channel, 0 to disable
+temp[1-4]_input     RO Temperature input
+temp[2-4]_fault     RO Fault indicator for remote channels
+temp[1-4]_max       RW Maximum temperature
+temp[1-4]_max_alarm RW Maximum temperature alarm
+temp[1-4]_min       RW Minimum temperature. Common for all channels.
+                       Only temp1_min is writeable.
+temp[1-4]_min_alarm RO Minimum temperature alarm
+temp[2-4]_offset    RW Temperature offset for remote channels
+=================== == =======================================================

drivers/hwmon/Kconfig

@@ -889,7 +889,7 @@ config SENSORS_MAX197
 	  will be called max197.
 
 config SENSORS_MAX31722
-tristate "MAX31722 temperature sensor"
+	tristate "MAX31722 temperature sensor"
 	depends on SPI
 	help
 	  Support for the Maxim Integrated MAX31722/MAX31723 digital
@@ -898,6 +898,16 @@ tristate "MAX31722 temperature sensor"
 	  This driver can also be built as a module. If so, the module
 	  will be called max31722.
 
+config SENSORS_MAX31730
+	tristate "MAX31730 temperature sensor"
+	depends on I2C
+	help
+	  Support for the Maxim Integrated MAX31730 3-Channel Remote
+	  Temperature Sensor.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called max31730.
+
 config SENSORS_MAX6621
 	tristate "Maxim MAX6621 sensor chip"
 	depends on I2C

drivers/hwmon/Makefile

@@ -123,6 +123,7 @@ obj-$(CONFIG_SENSORS_MAX1619)	+= max1619.o
 obj-$(CONFIG_SENSORS_MAX1668)	+= max1668.o
 obj-$(CONFIG_SENSORS_MAX197)	+= max197.o
 obj-$(CONFIG_SENSORS_MAX31722)	+= max31722.o
+obj-$(CONFIG_SENSORS_MAX31730)	+= max31730.o
 obj-$(CONFIG_SENSORS_MAX6621)	+= max6621.o
 obj-$(CONFIG_SENSORS_MAX6639)	+= max6639.o
 obj-$(CONFIG_SENSORS_MAX6642)	+= max6642.o