This patch adds bindings for Soundwire Slave devices that includes how SoundWire enumeration address and Link ID are used to represented in SoundWire slave device tree nodes. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx> --- .../soundwire/soundwire-controller.yaml | 82 +++++++++++++++++++ 1 file changed, 82 insertions(+) create mode 100644 Documentation/devicetree/bindings/soundwire/soundwire-controller.yaml diff --git a/Documentation/devicetree/bindings/soundwire/soundwire-controller.yaml b/Documentation/devicetree/bindings/soundwire/soundwire-controller.yaml new file mode 100644 index 000000000000..1b43993bccdb --- /dev/null +++ b/Documentation/devicetree/bindings/soundwire/soundwire-controller.yaml @@ -0,0 +1,82 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/soundwire/soundwire-controller.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: SoundWire Controller Generic Binding + +maintainers: + - Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx> + - Vinod Koul <vkoul@xxxxxxxxxx> + +description: | + SoundWire busses can be described with a node for the SoundWire controller + device and a set of child nodes for each SoundWire slave on the bus. + +properties: + $nodename: + pattern: "^soundwire(@.*)?$" + + "#address-cells": + const: 2 + + "#size-cells": + const: 0 + +patternProperties: + "^.*@[0-9a-f],[0-9a-f]$": + type: object + + properties: + compatible: + pattern: "^sdw[0-9a-f]{1}[0-9a-f]{4}[0-9a-f]{4}[0-9a-f]{2}$" + description: Is the textual representation of SoundWire Enumeration + address. compatible string should contain SoundWire Version ID, + Manufacturer ID, Part ID and Class ID in order and shall be in + lower-case hexadecimal with leading zeroes. + Valid sizes of these fields are + Version ID is 1 nibble, number '0x1' represents SoundWire 1.0 + and '0x2' represents SoundWire 1.1 and so on. + MFD is 4 nibbles + PID is 4 nibbles + CID is 2 nibbles + More Information on detail of encoding of these fields can be + found in MIPI Alliance DisCo & SoundWire 1.0 Specifications. + + reg: + maxItems: 1 + description: + Link ID followed by Instance ID of SoundWire Device Address. + + required: + - compatible + - reg + +required: + - "#address-cells" + - "#size-cells" + +examples: + - | + soundwire@c2d0000 { + #address-cells = <2>; + #size-cells = <0>; + reg = <0x0c2d0000 0x2000>; + + speaker@0,1 { + compatible = "sdw10217201000"; + reg = <0 1>; + powerdown-gpios = <&wcdpinctrl 2 0>; + #thermal-sensor-cells = <0>; + }; + + speaker@0,2 { + compatible = "sdw10217201000"; + reg = <0 2>; + powerdown-gpios = <&wcdpinctrl 2 0>; + #thermal-sensor-cells = <0>; + }; + }; + +... -- 2.21.0 _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx https://mailman.alsa-project.org/mailman/listinfo/alsa-devel
