On Wed, Aug 19, 2020 at 11:15:32AM +0200, Stephan Gerhold wrote: > In some cases we need to probe additional audio components that do > not appear as part of the DAI links specified in the device tree. > Examples for this are auxiliary devices such as analog amplifiers > or codecs. > > To make them work they need to be added as part of "aux-devs" > and connected to some other audio component using the audio routes > configurable using "(qcom,)audio-routing". > > Cc: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx> > Signed-off-by: Stephan Gerhold <stephan@xxxxxxxxxxx> > --- > .../devicetree/bindings/sound/qcom,apq8016-sbc.txt | 7 +++++++ > Documentation/devicetree/bindings/sound/qcom,apq8096.txt | 8 ++++++++ > Documentation/devicetree/bindings/sound/qcom,sdm845.txt | 8 ++++++++ > 3 files changed, 23 insertions(+) > > diff --git a/Documentation/devicetree/bindings/sound/qcom,apq8016-sbc.txt b/Documentation/devicetree/bindings/sound/qcom,apq8016-sbc.txt > index 84b28dbe9f15..23998262a0a7 100644 > --- a/Documentation/devicetree/bindings/sound/qcom,apq8016-sbc.txt > +++ b/Documentation/devicetree/bindings/sound/qcom,apq8016-sbc.txt > @@ -34,6 +34,13 @@ Required properties: > * DMIC > * Ext Spk > > +Optional properties: > + > +- aux-devs : A list of phandles for auxiliary devices (e.g. analog > + amplifiers) that do not appear directly within the DAI > + links. Should be connected to another audio component > + using "qcom,audio-routing". > + > Dai-link subnode properties and subnodes: > > Required dai-link subnodes: > diff --git a/Documentation/devicetree/bindings/sound/qcom,apq8096.txt b/Documentation/devicetree/bindings/sound/qcom,apq8096.txt > index c814e867850f..248df5056fec 100644 > --- a/Documentation/devicetree/bindings/sound/qcom,apq8096.txt > +++ b/Documentation/devicetree/bindings/sound/qcom,apq8096.txt > @@ -55,6 +55,14 @@ This binding describes the APQ8096 sound card, which uses qdsp for audio. > Value type: <stringlist> > Definition: The user-visible name of this sound card. > > +- aux-devs > + Usage: optional > + Value type: <phandles with arguments> How do you know how many arguments? It either has to be fixed or needs a #.*cells in the phandles. For the latter, you'd need to come up with a common binding. > + Definition: A list of phandles for auxiliary devices (e.g. analog > + amplifiers) that do not appear directly within the DAI > + links. Should be connected to another audio component > + using "audio-routing". > + > = dailinks > Each subnode of sndcard represents either a dailink, and subnodes of each > dailinks would be cpu/codec/platform dais. > diff --git a/Documentation/devicetree/bindings/sound/qcom,sdm845.txt b/Documentation/devicetree/bindings/sound/qcom,sdm845.txt > index ca8c89e88bfa..3d5cbe953cf7 100644 > --- a/Documentation/devicetree/bindings/sound/qcom,sdm845.txt > +++ b/Documentation/devicetree/bindings/sound/qcom,sdm845.txt > @@ -24,6 +24,14 @@ This binding describes the SDM845 sound card, which uses qdsp for audio. > Value type: <stringlist> > Definition: The user-visible name of this sound card. > > +- aux-devs > + Usage: optional > + Value type: <phandles with arguments> > + Definition: A list of phandles for auxiliary devices (e.g. analog > + amplifiers) that do not appear directly within the DAI > + links. Should be connected to another audio component > + using "audio-routing". > + > = dailinks > Each subnode of sndcard represents either a dailink, and subnodes of each > dailinks would be cpu/codec/platform dais. > -- > 2.28.0 >
