diff options
| author | Bastien Curutchet <bastien.curutchet@bootlin.com> | 2024-04-02 09:12:12 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2024-04-09 16:58:42 +0100 |
| commit | 609302ca04a3177463b0fbf4d5fc55a3ab4f900d (patch) | |
| tree | bb36d722e2b706b26a30b1c1b825e880626cb8d6 | |
| parent | 92e7bb2b6aa374c130dcf052f2c52f63c5b75d38 (diff) | |
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: Bastien Curutchet <bastien.curutchet@bootlin.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Peter Ujfalusi <peter.ujfalusi@gmail.com>
Link: https://msgid.link/r/20240402071213.11671-13-bastien.curutchet@bootlin.com
Signed-off-by: Mark Brown <broonie@kernel.org>
| -rw-r--r-- | Documentation/devicetree/bindings/sound/davinci-mcbsp.yaml | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/sound/davinci-mcbsp.yaml b/Documentation/devicetree/bindings/sound/davinci-mcbsp.yaml index 0c2b1936c6a1..4fa677023827 100644 --- a/Documentation/devicetree/bindings/sound/davinci-mcbsp.yaml +++ b/Documentation/devicetree/bindings/sound/davinci-mcbsp.yaml @@ -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 |