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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"
- 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
- qcom,din-ports:
Usage: required
Value type: <u32>
Definition: must be count of data in ports
- 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 Interval
calculation.
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 Channel
1 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-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,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 Transport
sub-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 port
1 for simple ports
2 for full port
Out 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.
= 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{
....
};
/* Right Speaker */
right{
....
};
};
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