Unverified Commit 609302ca authored by Bastien Curutchet's avatar Bastien Curutchet Committed by Mark Brown
Browse files

ASoC: dt-bindings: davinci-mcbsp: Add the 'ti,T1-framing-{rx/tx}' flags 



McBSP's data delay can be configured from 0 to 2 bit clock periods. 0 is
used for DSP_B format, 1 for DSP_A format. A data delay of 2 bit clock
periods can be used to interface to 'T1 framing' devices where data
stream is preceded by a 'framing bit'. This 2 bit clock data delay is
not described in the bindings.

Add two flags 'ti,T1-framing-[rx/tx]' to enable a data delay of 2
bit clock periods in reception or transmission.

Signed-off-by: default avatarBastien Curutchet <bastien.curutchet@bootlin.com>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Acked-by: default avatarPeter Ujfalusi <peter.ujfalusi@gmail.com>
Link: https://msgid.link/r/20240402071213.11671-13-bastien.curutchet@bootlin.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 92e7bb2b

Documentation/devicetree/bindings/sound/davinci-mcbsp.yaml

+14 −0
Original line number Diff line number Diff line
@@ -67,6 +67,20 @@ properties: 
  "#sound-dai-cells":

    const: 0



  ti,T1-framing-tx:

    $ref: /schemas/types.yaml#/definitions/flag

    description:

      If the property is present, tx data delay is set to 2 bit clock periods.

      McBSP will insert a blank period (high-impedance period) before the first

      data bit. This can be used to interface to T1-framing devices.



  ti,T1-framing-rx:

    $ref: /schemas/types.yaml#/definitions/flag

    description:

      If the property is present, rx data delay is set to 2 bit clock periods.

      McBSP will discard the bit preceding the data stream (called framing bit).

      This can be used to interface to T1-framing devices.



required:

  - "#sound-dai-cells"

  - compatible