Message ID | 20240402071213.11671-13-bastien.curutchet@bootlin.com (mailing list archive) |
---|---|
State | Accepted |
Commit | 609302ca04a3177463b0fbf4d5fc55a3ab4f900d |
Headers | show |
Series | ASoC: ti: davinci-i2s: Add features to McBSP driver | expand |
On Tue, 02 Apr 2024 09:12:12 +0200, Bastien Curutchet wrote: > 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> > --- > .../devicetree/bindings/sound/davinci-mcbsp.yaml | 14 ++++++++++++++ > 1 file changed, 14 insertions(+) > Reviewed-by: Rob Herring <robh@kernel.org>
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
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> --- .../devicetree/bindings/sound/davinci-mcbsp.yaml | 14 ++++++++++++++ 1 file changed, 14 insertions(+)