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authorNaveen Krishna Chatradhi <ch.naveen@samsung.com>2013-03-13 09:38:20 +0530
committerGuenter Roeck <linux@roeck-us.net>2013-04-07 21:16:38 -0700
commit9e8269de100dd0be1199778dc175ff22417aebd2 (patch)
tree743aa1c1d90be98c11d297e055c557162e98d8c3 /Documentation/devicetree
parent4b5e536b0e948b5c756aa1d57218371c242f768d (diff)
downloadlinux-9e8269de100dd0be1199778dc175ff22417aebd2.tar.gz
hwmon: (ntc_thermistor) Add DT with IIO support to NTC thermistor driver
This patch adds DT support to NTC driver to parse the platform data. Also adds the support to work as an iio device client. During the probe ntc driver gets the respective channels of ADC and uses iio_raw_read calls to get the ADC converted value. Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com> [Guenter Roeck: fixed Kconfig dependencies; use ERR_CAST] Tested-by: Doug Anderson <dianders@chromium.org> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'Documentation/devicetree')
-rw-r--r--Documentation/devicetree/bindings/hwmon/ntc_thermistor.txt29
1 files changed, 29 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/hwmon/ntc_thermistor.txt b/Documentation/devicetree/bindings/hwmon/ntc_thermistor.txt
new file mode 100644
index 00000000000..c6f66674f19
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+++ b/Documentation/devicetree/bindings/hwmon/ntc_thermistor.txt
@@ -0,0 +1,29 @@
+NTC Thermistor hwmon sensors
+-------------------------------
+
+Requires node properties:
+- "compatible" value : one of
+ "ntc,ncp15wb473"
+ "ntc,ncp18wb473"
+ "ntc,ncp21wb473"
+ "ntc,ncp03wb473"
+ "ntc,ncp15wl333"
+- "pullup-uv" Pull up voltage in micro volts
+- "pullup-ohm" Pull up resistor value in ohms
+- "pulldown-ohm" Pull down resistor value in ohms
+- "connected-positive" Always ON, If not specified.
+ Status change is possible.
+- "io-channels" Channel node of ADC to be used for
+ conversion.
+
+Read more about iio bindings at
+ Documentation/devicetree/bindings/iio/iio-bindings.txt
+
+Example:
+ ncp15wb473@0 {
+ compatible = "ntc,ncp15wb473";
+ pullup-uv = <1800000>;
+ pullup-ohm = <47000>;
+ pulldown-ohm = <0>;
+ io-channels = <&adc 3>;
+ };