hwmon: Driver for NTC Thermistors

Add support for NTC Thermistor series. In this release, the
following thermistors are supported: NCP15WB473, NCP18WB473, NCP03WB473,
and NCP15WL333. This driver is based on the datasheet of MURATA.

The driver in the patch does conversion from the raw ADC value
(either voltage or resistence) to temperature. In order to use
voltage values as input, the circuit schematics should be provided
with the platform data. A compensation table for each type of thermistor
is provided for the conversion.

Signed-off-by: Donggeun Kim <dg77.kim@samsung.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: KyungMin Park <kyungmin.park@samsung.com>
Reviewed-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index dec5eee3542f..770fc8195627 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -777,6 +777,20 @@ config SENSORS_MAX6650
           This driver can also be built as a module.  If so, the module
           will be called max6650.
 
+config SENSORS_NTC_THERMISTOR
+        tristate "NTC thermistor support"
+        depends on EXPERIMENTAL
+        help
+          This driver supports NTC thermistors sensor reading and its
+          interpretation. The driver can also monitor the temperature and
+          send notifications about the temperature.
+
+          Currently, this driver supports
+          NCP15WB473, NCP18WB473, NCP21WB473, NCP03WB473, and NCP15WL333.
+
+          This driver can also be built as a module.  If so, the module
+          will be called ntc-thermistor.
+
 config SENSORS_PC87360
         tristate "National Semiconductor PC87360 family"
         select HWMON_VID