[PATCHv7 1/3] dt-bindings: i2c: document bindings for i2c-slave-mqueue

[Eduardo Valentin]

Document the i2c-slave-mqueue binding by adding
descriptor, required properties, and example.

Cc: Rob Herring <robh+dt@xxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Wolfram Sang <wsa@xxxxxxxxxxxxx>
Cc: linux-i2c@xxxxxxxxxxxxxxx
Cc: devicetree@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Signed-off-by: Eduardo Valentin <eduval@xxxxxxxxxx>
---

Changes from V6 to V7:
- none

 .../bindings/i2c/i2c-slave-mqueue.txt         | 34 +++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/i2c/i2c-slave-mqueue.txt

diff --git a/Documentation/devicetree/bindings/i2c/i2c-slave-mqueue.txt b/Documentation/devicetree/bindings/i2c/i2c-slave-mqueue.txt
new file mode 100644
index 000000000000..eb1881a4fc0e
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/i2c-slave-mqueue.txt
@@ -0,0 +1,34 @@
+===============================================
+Device Tree for I2C slave message queue backend
+===============================================
+
+Some protocols over I2C/SMBus are designed for bi-directional transferring
+messages by using I2C Master Write protocol. This requires that both sides
+of the communication have slave addresses.
+
+This I2C slave mqueue (message queue) is used to receive and queue
+messages from the remote i2c intelligent device; and it will add the target
+slave address (with R/W# bit is always 0) into the message at the first byte.
+
+Links
+----
+`Intelligent Platform Management Bus
+Communications Protocol Specification
+<https://www.intel.com/content/dam/www/public/us/en/documents/product-briefs/ipmp-spec-v1.0.pdf>`_
+
+`Management Component Transport Protocol (MCTP)
+SMBus/I2C Transport Binding Specification
+<https://www.dmtf.org/sites/default/files/standards/documents/DSP0237_1.1.0.pdf>`_
+
+Required Properties:
+- compatible		: should be "i2c-slave-mqueue"
+- reg			: slave address
+
+Example:
+
+i2c {
+	slave_mqueue: i2c-slave-mqueue {
+		compatible = "i2c-slave-mqueue";
+		reg = <0x10>;
+	};
+};
-- 
2.21.0