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From:   Patrick Havelange <patrick.havelange@essensium.com>
To:     Jonathan Cameron <jic23@kernel.org>,
        Hartmut Knaack <knaack.h@gmx.de>,
        Lars-Peter Clausen <lars@metafoo.de>,
        Peter Meerwald-Stadler <pmeerw@pmeerw.net>,
        Rob Herring <robh+dt@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Paresh Chaudhary <paresh.chaudhary@rockwellcollins.com>,
        Matt Weber <matthew.weber@rockwellcollins.com>,
        linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org,
        devicetree@vger.kernel.org
Cc:     Patrick Havelange <patrick.havelange@essensium.com>
Subject: [PATCH v7 2/3] iio:temperature:max31856:Add device tree bind info
Date:   Tue, 26 Mar 2019 12:18:41 +0100
Message-Id: <20190326111842.12399-2-patrick.havelange@essensium.com>
In-Reply-To: <20190326111842.12399-1-patrick.havelange@essensium.com>
References: <20190326111842.12399-1-patrick.havelange@essensium.com>
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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>
Reviewed-by: Rob Herring <robh@kernel.org>
---
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

v6 -> v7
[Patrick
 - None
---
 .../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