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- To: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
- Subject: Re: [PATCH v3 4/6] dt-bindings: sound: Add support for the Lantiq PEF2256 codec
- From: Herve Codina <herve.codina@xxxxxxxxxxx>
- Date: Thu, 23 Mar 2023 08:27:58 +0100
- Cc: Lee Jones <lee@xxxxxxxxxx>, Rob Herring <robh+dt@xxxxxxxxxx>, Krzysztof Kozlowski <krzysztof.kozlowski+dt@xxxxxxxxxx>, Liam Girdwood <lgirdwood@xxxxxxxxx>, Mark Brown <broonie@xxxxxxxxxx>, Takashi Iwai <tiwai@xxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, devicetree@xxxxxxxxxxxxxxx, alsa-devel@xxxxxxxxxxxxxxxx, Christophe Leroy <christophe.leroy@xxxxxxxxxx>, Thomas Petazzoni <thomas.petazzoni@xxxxxxxxxxx>
- In-reply-to: <cf87e7c0-b769-d1fc-0718-c5c2986993b8@linaro.org>
- Organization: Bootlin
- References: <20230322134654.219957-1-herve.codina@bootlin.com> <20230322134654.219957-5-herve.codina@bootlin.com> <cf87e7c0-b769-d1fc-0718-c5c2986993b8@linaro.org>
Hi Krzysztof On Wed, 22 Mar 2023 22:59:37 +0100 Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx> wrote: > On 22/03/2023 14:46, Herve Codina wrote: > > The Lantiq PEF2256 is a framer and line interface component designed to > > fulfill all required interfacing between an analog E1/T1/J1 line and the > > digital PCM system highway/H.100 bus. > > > > The codec support allows to use some of the PCM system highway > > time-slots as audio channels to transport audio data over the E1/T1/J1 > > lines. > > > > Signed-off-by: Herve Codina <herve.codina@xxxxxxxxxxx> > > --- > > .../bindings/sound/lantiq,pef2256-codec.yaml | 54 +++++++++++++++++++ > > 1 file changed, 54 insertions(+) > > create mode 100644 Documentation/devicetree/bindings/sound/lantiq,pef2256-codec.yaml > > > > diff --git a/Documentation/devicetree/bindings/sound/lantiq,pef2256-codec.yaml b/Documentation/devicetree/bindings/sound/lantiq,pef2256-codec.yaml > > new file mode 100644 > > index 000000000000..da35b70cda99 > > --- /dev/null > > +++ b/Documentation/devicetree/bindings/sound/lantiq,pef2256-codec.yaml > > @@ -0,0 +1,54 @@ > > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > > +%YAML 1.2 > > +--- > > +$id: http://devicetree.org/schemas/sound/lantiq,pef2256-codec.yaml# > > +$schema: http://devicetree.org/meta-schemas/core.yaml# > > + > > +title: Lantiq PEF2256 codec > > + > > +maintainers: > > + - Herve Codina <herve.codina@xxxxxxxxxxx> > > + > > +description: | > > + Codec support for PEF2256. > > + > > + The Lantiq PEF2256, also known as Infineon PEF2256 or FALC56, is a framer and > > + line interface component designed to fulfill all required interfacing between > > + an analog E1/T1/J1 line and the digital PCM system highway/H.100 bus. > > + > > + The codec support allows to use some of the PCM system highway time-slots as > > + audio channels to transport audio data over the E1/T1/J1 lines. > > + > > + The time-slots used by the codec must be set and so, the properties > > + 'dai-tdm-slot-num', 'dai-tdm-slot-width', 'dai-tdm-slot-tx-mask' and > > + 'dai-tdm-slot-rx-mask' must be present in the ALSA sound card node for > > + sub-nodes that involve the codec. The codec uses 8bit time-slots. > > + 'dai-tdm-tdm-slot-with' must be set to 8. > > + The tx and rx masks define the PEF2256 time-slots assigned to the codec. > > + > > + The PEF2256 codec node should be a child of a PEF2256 node. > > + Refer to the bindings described in > > + Documentation/devicetree/bindings/mfd/lantiq,pef2256.yaml > > + > > +allOf: > > + - $ref: dai-common.yaml# > > + > > +properties: > > + compatible: > > + const: lantiq,pef2256-codec > > + > > + '#sound-dai-cells': > > + const: 0 > > You do not have here any resources, so the entire binding can be dropped > and merged into the parent. > > Best regards, > Krzysztof > Ok, Do you expect all these properties (except compatible) merged at the parent level or may I keep a child node with these properties including the compatible property (ie. yaml file merge). Regards, Hervé -- Hervé Codina, Bootlin Embedded Linux and Kernel engineering https://bootlin.com
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