McBSP is able to handle capture and playback stream. The McBSP's DX pins that outputs serial data during playback streams can be used to output a chosen pattern during capture streams. For instance, this can be useful to drive an active-low signal during capture streams (by choosing <0> as pattern)
Add a 'ti,drive-dx' property that can be used to repeatedly output a chosen pattern on DX pin while capture stream is ON.
Signed-off-by: Bastien Curutchet bastien.curutchet@bootlin.com --- Documentation/devicetree/bindings/sound/davinci-mcbsp.yaml | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/Documentation/devicetree/bindings/sound/davinci-mcbsp.yaml b/Documentation/devicetree/bindings/sound/davinci-mcbsp.yaml index d8d4e7ea6e02..f4d1fc6bcd61 100644 --- a/Documentation/devicetree/bindings/sound/davinci-mcbsp.yaml +++ b/Documentation/devicetree/bindings/sound/davinci-mcbsp.yaml @@ -80,6 +80,13 @@ properties: Enable synchronisation error detections when an unexpected frame pulse is received. If not present, unexpected frame pulses are ignored.
+ ti,drive-dx: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + If the property is present, McBSP will repeatedly output the selected + value on DX pin during capture streams. For instance, if set to 0, this + can be used to drive an active-low signal. + required: - "#sound-dai-cells" - compatible