On Fri, Oct 11, 2019 at 04:44:22PM +0100, Srinivas Kandagatla wrote:
This patch adds bindings for Qualcomm soundwire controller.
Qualcomm SoundWire Master controller is present in most Qualcomm SoCs either integrated as part of WCD audio codecs via slimbus or as part of SOC I/O.
Signed-off-by: Srinivas Kandagatla srinivas.kandagatla@linaro.org
.../bindings/soundwire/qcom,sdw.txt | 167 ++++++++++++++++++ 1 file changed, 167 insertions(+) create mode 100644 Documentation/devicetree/bindings/soundwire/qcom,sdw.txt
Next time, do a DT schema.
diff --git a/Documentation/devicetree/bindings/soundwire/qcom,sdw.txt b/Documentation/devicetree/bindings/soundwire/qcom,sdw.txt new file mode 100644 index 000000000000..436547f3b155 --- /dev/null +++ b/Documentation/devicetree/bindings/soundwire/qcom,sdw.txt @@ -0,0 +1,167 @@ +Qualcomm SoundWire Controller Bindings
+This binding describes the Qualcomm SoundWire Controller along with its +board specific bus parameters.
+- compatible:
- Usage: required
- Value type: <stringlist>
- Definition: must be "qcom,soundwire-v<MAJOR>.<MINOR>.<STEP>",
Example:"qcom,soundwire-v1.3.0""qcom,soundwire-v1.5.0""qcom,soundwire-v1.6.0"
This needs to be the actual versions supported, not examples. Elsewhere in QCom bindings, we've used standard SoC specific compatibles as there never tends to be many SoCs with the same version. Anything different here?
+- reg:
- Usage: required
- Value type: <prop-encoded-array>
- Definition: the base address and size of SoundWire controller
address space.+- interrupts:
- Usage: required
- Value type: <prop-encoded-array>
- Definition: should specify the SoundWire Controller IRQ
+- clock-names:
- Usage: required
- Value type: <stringlist>
- Definition: should be "iface" for SoundWire Controller interface clock
+- clocks:
- Usage: required
- Value type: <prop-encoded-array>
- Definition: should specify the SoundWire Controller interface clock
+- #sound-dai-cells:
- Usage: required
- Value type: <u32>
- Definition: must be 1 for digital audio interfaces on the controller.
+- qcom,dout-ports:
- Usage: required
- Value type: <u32>
- Definition: must be count of data out ports
Up to how many?
+- qcom,din-ports:
- Usage: required
- Value type: <u32>
- Definition: must be count of data in ports
Up to how many?
+- qcom,ports-offset1:
- Usage: required
- Value type: <prop-encoded-array>
- Definition: should specify payload transport window offset1 of each
data port. Out ports followed by In ports.More info in MIPI Alliance SoundWire 1.0 Specifications.+- qcom,ports-offset2:
- Usage: required
- Value type: <prop-encoded-array>
- Definition: should specify payload transport window offset2 of each
data port. Out ports followed by In ports.More info in MIPI Alliance SoundWire 1.0 Specifications.+- qcom,ports-sinterval-low:
- Usage: required
- Value type: <prop-encoded-array>
- Definition: should be sample interval low of each data port.
Out ports followed by In ports. Used for Sample Intervalcalculation.More info in MIPI Alliance SoundWire 1.0 Specifications.+- qcom,ports-word-length:
- Usage: optional
- Value type: <prop-encoded-array>
- Definition: should be size of payload channel sample.
More info in MIPI Alliance SoundWire 1.0 Specifications.+- qcom,ports-block-pack-mode:
- Usage: optional
- Value type: <prop-encoded-array>
- Definition: should be 0 or 1 to indicate the block packing mode.
0 to indicate Blocks are per Channel1 to indicate Blocks are per Port.Out ports followed by In ports.More info in MIPI Alliance SoundWire 1.0 Specifications.+- qcom,ports-block-group-count:
- Usage: optional
- Value type: <prop-encoded-array>
- Definition: should be in range 1 to 4 to indicate how many sample
intervals are combined into a payload.Out ports followed by In ports.More info in MIPI Alliance SoundWire 1.0 Specifications.+- qcom,ports-lane-control:
- Usage: optional
- Value type: <prop-encoded-array>
- Definition: should be in range 0 to 7 to identify which data lane
the data port uses.Out ports followed by In ports.More info in MIPI Alliance SoundWire 1.0 Specifications.+- qcom,ports-hstart:
- Usage: optional
- Value type: <prop-encoded-array>
- Definition: should be number identifying lowerst numbered coloum in
SoundWire Frame, i.e. left edge of the Transport sub-framefor each port. Values between 0 and 15 are valid.Out ports followed by In ports.More info in MIPI Alliance SoundWire 1.0 Specifications.+- qcom,ports-hstop:
- Usage: optional
- Value type: <prop-encoded-array>
- Definition: should be number identifying highest numbered coloum in
SoundWire Frame, i.e. the right edge of the Transportsub-frame for each port. Values between 0 and 15 are valid.Out ports followed by In ports.More info in MIPI Alliance SoundWire 1.0 Specifications.+- qcom,dports-type:
- Usage: optional
- Value type: <prop-encoded-array>
- Definition: should be one of the following types
0 for reduced port1 for simple ports2 for full portOut ports followed by In ports.More info in MIPI Alliance SoundWire 1.0 Specifications.+Note:
- More Information on detail of encoding of these fields can be
+found in MIPI Alliance SoundWire 1.0 Specifications.
+= SoundWire devices +Each subnode of the bus represents SoundWire device attached to it. +The properties of these nodes are defined by the individual bindings.
Is there some sort of addressing that needs to be defined?
+= EXAMPLE +The following example represents a SoundWire controller on DB845c board +which has controller integrated inside WCD934x codec on SDM845 SoC.
+soundwire: soundwire@c85 {
- compatible = "qcom,soundwire-v1.3.0";
- reg = <0xc85 0x20>;
- interrupts = <20 IRQ_TYPE_EDGE_RISING>;
- clocks = <&wcc>;
- clock-names = "iface";
- #sound-dai-cells = <1>;
- qcom,dports-type = <0>;
- qcom,dout-ports = <6>;
- qcom,din-ports = <2>;
- qcom,ports-sinterval-low = /bits/ 8 <0x07 0x1F 0x3F 0x7 0x1F 0x3F 0x0F 0x0F>;
- qcom,ports-offset1 = /bits/ 8 <0x01 0x02 0x0C 0x6 0x12 0x0D 0x07 0x0A >;
- qcom,ports-offset2 = /bits/ 8 <0x00 0x00 0x1F 0x00 0x00 0x1F 0x00 0x00>;
- /* Left Speaker */
- left{
space ^
....- };
- /* Right Speaker */
- right{
ditto
....- };
+};
2.21.0