[PATCH 2/2] iio:temperature:max31856:Add device tree bind info

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From: Paresh Chaudhary <paresh.chaudhary@xxxxxxxxxxxxxxxxxxx>

This patch added device tree binding info for MAX31856 driver.

Signed-off-by: Paresh Chaudhary <paresh.chaudhary@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Matt Weber <matthew.weber@xxxxxxxxxxxxxxxxxxx>
---
 .../bindings/iio/temperature/max31856.txt          | 36 ++++++++++++++++++++++
 MAINTAINERS                                        |  1 +
 2 files changed, 37 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/temperature/max31856.txt

diff --git a/Documentation/devicetree/bindings/iio/temperature/max31856.txt b/Documentation/devicetree/bindings/iio/temperature/max31856.txt
new file mode 100644
index 0000000..fb1dfca
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/temperature/max31856.txt
@@ -0,0 +1,36 @@
+Maxim MAX31856 thermocouple support
+
+https://datasheets.maximintegrated.com/en/ds/MAX31856.pdf
+
+Required properties:
+	- compatible: must be "max31856"
+	- reg: SPI chip select number for the device
+	- spi-max-frequency: As per datasheet max. supported freq is 5000000
+	- spi-cpha: must be defined for max31856 to enable SPI mode 1
+	- type: Type of thermocouple (By default is K-Type)
+	/*
+	  TYPE_B = 0x00
+	  TYPE_E = 0x01
+	  TYPE_J = 0x02
+	  TYPE_K = 0x03
+	  TYPE_N = 0x04
+	  TYPE_R = 0x05
+	  TYPE_S = 0x06
+	  TYPE_T = 0x07
+	  VMODE_G8 = 0x08
+	  VMODE_G32 = 0x12
+        */
+
+	Refer to spi/spi-bus.txt for generic SPI slave bindings.
+
+Optional properties:
+	- one-shot: Enable one-shot Conversion mode (By default mode is auto)
+
+ Example:
+	max31856@0 {
+		compatible = "max31856";
+		reg = <0>;
+		spi-max-frequency = <5000000>;
+		spi-cpha;
+		type = <0x03>;
+	};
diff --git a/MAINTAINERS b/MAINTAINERS
index dd9a83d..6482ae8 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7161,6 +7161,7 @@ MAX31856 IIO DRIVER
 M:	Matthew Weber <matthew.weber@xxxxxxxxxxxxxxxxxxx>
 S:	Maintained
 F:	drivers/iio/temperature/max31856.c
+F:	Documentation/devicetree/bindings/iio/temperature/max31856.txt
 
 IIO UNIT CONVERTER
 M:	Peter Rosin <peda@xxxxxxxxxx>
-- 
1.9.1




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