On 08-08-19, 15:45, Srinivas Kandagatla wrote:
This patch adds bindings for Soundwire Slave devices which includes how SoundWire enumeration address is represented in SoundWire slave device tree nodes.
Signed-off-by: Srinivas Kandagatla srinivas.kandagatla@linaro.org
.../devicetree/bindings/soundwire/slave.txt | 46 +++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 Documentation/devicetree/bindings/soundwire/slave.txt
diff --git a/Documentation/devicetree/bindings/soundwire/slave.txt b/Documentation/devicetree/bindings/soundwire/slave.txt new file mode 100644 index 000000000000..b8e8d34bbc92 --- /dev/null +++ b/Documentation/devicetree/bindings/soundwire/slave.txt @@ -0,0 +1,46 @@ +SoundWire slave device bindings.
+SoundWire is a 2-pin multi-drop interface with data and clock line. +It facilitates development of low cost, efficient, high performance systems.
+SoundWire slave devices: +Every SoundWire controller node can contain zero or more child nodes +representing slave devices on the bus. Every SoundWire slave device is +uniquely determined by the enumeration address containing 5 fields: +SoundWire Version, Instance ID, Manufacturer ID, Part ID and Class ID +for a device. Addition to below required properties, child nodes can
It would help to list them rather than free flowing text
+have device specific bindings.
+Required property for SoundWire child node if it is present:
As said earlier, lets make it "Required properties:"
+- compatible: "sdwVER,MFD,PID,CID". The textual representation of
SoundWire Enumeration address comprising SoundWireVersion, Manufacturer ID, Part ID and Class ID,shall be in lower-case hexadecimal with leadingzeroes suppressed.Version number '0x10' represents SoundWire 1.0Version number '0x11' represents SoundWire 1.1ex: "sdw10,0217,2010,0"+- sdw-instance-id: Should be ('Instance ID') from SoundWire
Enumeration Address. Instance ID is for the caseswhere multiple Devices of the same type or Classare attached to the bus.+SoundWire example for Qualcomm's SoundWire controller:
+soundwire@c2d0000 {
- compatible = "qcom,soundwire-v1.5.0"
- reg = <0x0c2d0000 0x2000>;
- spkr_left:wsa8810-left{
compatible = "sdw10,0217,2010,0";sdw-instance-id = <1>;...- };
- spkr_right:wsa8810-right{
compatible = "sdw10,0217,2010,0";sdw-instance-id = <2>;...- };
+};
2.21.0