linux-kernel - Re: [PATCH v3 1/2] dt-bindings: soundwire: add bindings for Qcom controller

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Message-ID: <CAL_Jsq+ZBhh2A3yLtOyReHHAET_bvM-ygBtRXeFihAxf0jvDKQ@mail.gmail.com>
Date:   Tue, 15 Oct 2019 06:35:00 -0500
From:   Rob Herring <robh@...nel.org>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Cc:     Vinod <vkoul@...nel.org>, Mark Brown <broonie@...nel.org>,
        Banajit Goswami <bgoswami@...eaurora.org>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        devicetree@...r.kernel.org, Liam Girdwood <lgirdwood@...il.com>,
        Linux-ALSA <alsa-devel@...a-project.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        spapothi@...eaurora.org
Subject: Re: [PATCH v3 1/2] dt-bindings: soundwire: add bindings for Qcom controller

On Mon, Oct 14, 2019 at 12:34 PM Srinivas Kandagatla
<srinivas.kandagatla@...aro.org> wrote:
>
> Thanks Rob for taking time to review,
>
> On 14/10/2019 18:12, Rob Herring wrote:
> > On Fri, Oct 11, 2019 at 04:44:22PM +0100, Srinivas Kandagatla wrote:
> >> This patch adds bindings for Qualcomm soundwire controller.
> >>
> >> Qualcomm SoundWire Master controller is present in most Qualcomm SoCs
> >> either integrated as part of WCD audio codecs via slimbus or
> >> as part of SOC I/O.
> >>
> >> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
> >> ---
> >>   .../bindings/soundwire/qcom,sdw.txt           | 167 ++++++++++++++++++
> >>   1 file changed, 167 insertions(+)
> >>   create mode 100644 Documentation/devicetree/bindings/soundwire/qcom,sdw.txt
> >
> > Next time, do a DT schema.
> >
> Sure! I can do that in next version!

I meant the next binding you write, not v4. However, ...

[...]

> >> += SoundWire devices
> >> +Each subnode of the bus represents SoundWire device attached to it.
> >> +The properties of these nodes are defined by the individual bindings.
> >
> > Is there some sort of addressing that needs to be defined?
> >
> Thanks, Looks like I missed that here.
>
> it should be something like this,
>
> #address-cells = <2>;
> #size-cells = <0>;
>
> Will add the in next version.

You need a common soundwire binding for this. You also need to define
the format of 'reg' and unit addresses. And it needs to be a schema.
So perhaps this binding too should be.

Rob