netdev - Re: [PATCH v2 4/4] arm64: dts: qcom: thinkpad-x13s: Add bluetooth

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Date:   Fri, 3 Feb 2023 12:12:06 -0800
From:   Luiz Augusto von Dentz <luiz.dentz@...il.com>
To:     Steev Klimaszewski <steev@...i.org>
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Marcel Holtmann <marcel@...tmann.org>,
        Johan Hedberg <johan.hedberg@...il.com>,
        Sven Peter <sven@...npeter.dev>, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-bluetooth@...r.kernel.org,
        Mark Pearson <markpearson@...ovo.com>
Subject: Re: [PATCH v2 4/4] arm64: dts: qcom: thinkpad-x13s: Add bluetooth

Hi Steev,

On Tue, Jan 31, 2023 at 7:13 PM Steev Klimaszewski <steev@...i.org> wrote:
>
> >On 31/01/2023 05:38, Steev Klimaszewski wrote:
> >> Signed-off-by: Steev Klimaszewski <steev@...i.org>
> >> ---
> >>  .../qcom/sc8280xp-lenovo-thinkpad-x13s.dts    | 68 +++++++++++++++++++
> >>  1 file changed, 68 insertions(+)
> >>
> >> diff --git a/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts b/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts
> >> index f936b020a71d..951438ac5946 100644
> >> --- a/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts
> >> +++ b/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts
> >> @@ -24,6 +24,8 @@ / {
> >>      aliases {
> >>              i2c4 = &i2c4;
> >>              i2c21 = &i2c21;
> >> +            serial0 = &uart17;
> >> +            serial1 = &uart2;
> >>      };
> >>
> >>      wcd938x: audio-codec {
> >> @@ -712,6 +714,32 @@ &qup0 {
> >>      status = "okay";
> >>  };
> >>
> >> +&uart2 {
> >> +    status = "okay";
> >> +
> >> +    pinctrl-names = "default";
> >> +    pinctrl-0 = <&uart2_state>;
> >> +
> >> +    bluetooth {
> >> +            compatible = "qcom,wcn6855-bt";
> >> +
> >> +/*
>
> > Why dead code should be in the kernel?
>
> As mentioned in the cover letter, this is a bit closer to an RFC than ready to
> go in, and I do apologize that it wasn't clear enough.  I do not have access to
> the schematics, and based on my reading of the schema for bluetooth, these
> entries are supposed to be required, however, like the wcn6750, I have dummy
> data entered into the qca_soc_data_wcn6855 struct.  I know that these should be
> there, I just do not have access to the correct information to put, if that
> makes sense?

Well you don't have the RFC set in the subject which is probably why
people are reviewing it like it is supposed to be merged, that said I
do wonder if there is to indicate these entries are to be considered
sort of experimental so we don't end up enabling it by default?

>
> <snip>
>
> >Does not look like you tested the DTS against bindings. Please run `make
> >dtbs_check` (see Documentation/devicetree/bindings/writing-schema.rst
> >for instructions).
>
> Correct I had not, but I have now, and will make the corrections test and they
> will be included in v3.
>
> >Best regards,
> >Krzysztof
>
> I appreciate the guidance for what I was doing incorrectly.
>
> -- steev



-- 
Luiz Augusto von Dentz