[PATCH v6 3/4] iio:temperature:max31856:Add device tree bind info

Patrick Havelange
2019-03-07T10:34:43Z

From: Paresh Chaudhary <paresh.chaudhary@rockwellcollins.com>

This patch added device tree binding info for MAX31856 driver.

Signed-off-by: Paresh Chaudhary <paresh.chaudhary@rockwellcollins.com>
Signed-off-by: Matt Weber <matthew.weber@rockwellcollins.com>
Signed-off-by: Patrick Havelange <patrick.havelange@essensium.com>
---
Changes
v1 -> v2
[Matt
- Removed comment block and added possibilities of
thermocouple type in device tree binding doc.

v2 -> v3
- Rebased

v3 -> v4
- Removed one-shot property related information.
- Used standard name 'temp-sensor'

v4 -> v5
[Patrick
- Rename thermocouple type to maxim,thermocouple-type for DT entry

v5 -> v6
[Patrick
- use generic thermocouple-type for DT entry
---
.../bindings/iio/temperature/max31856.txt | 24 +++++++++++++++++++
1 file changed, 24 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 000000000000..06ab43bb4de8
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/temperature/max31856.txt
@@ -0,0 +1,24 @@
+Maxim MAX31856 thermocouple support
+
+https://datasheets.maximintegrated.com/en/ds/MAX31856.pdf
+
+Optional property:
+ - thermocouple-type: Type of thermocouple (THERMOCOUPLE_TYPE_K if
+ omitted). Supported types are B, E, J, K, N, R, S, T.
+
+Required properties:
+ - compatible: must be "maxim,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
+
+ Refer to spi/spi-bus.txt for generic SPI slave bindings.
+
+ Example:
+ temp-sensor@0 {
+ compatible = "maxim,max31856";
+ reg = <0>;
+ spi-max-frequency = <5000000>;
+ spi-cpha;
+ thermocouple-type = <THERMOCOUPLE_TYPE_K>;
+ };
--
2.19.1