linux-kernel - Re: [PATCH v4] Bluetooth: arm64: dts: qcom: sc7280: Add IO regulator handler in SC7280 CRD platforms

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Message-ID: <YmQcu2GVES4FuwFU@builder.lan>
Date:   Sat, 23 Apr 2022 10:35:23 -0500
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Sai Teja Aluvala <quic_saluvala@...cinc.com>
Cc:     marcel@...tmann.org, johan.hedberg@...il.com, agross@...nel.org,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-bluetooth@...r.kernel.org,
        mka@...omium.org, quic_hemantg@...cinc.com,
        quic_bgodavar@...cinc.com, quic_rjliao@...cinc.com,
        quic_hbandi@...cinc.com, abhishekpandit@...omium.org,
        mcchou@...omium.org
Subject: Re: [PATCH v4] Bluetooth: arm64: dts: qcom: sc7280: Add IO regulator
 handler in SC7280 CRD platforms

On Wed 20 Apr 07:45 CDT 2022, Sai Teja Aluvala wrote:

Look here:

$ git log --oneline -- sc7280-crd.dts
737f9ea6cee7 arm64: dts: qcom: sc7280: Rename crd to crd-r3
073a39a2a63a arm64: dts: qcom: sc7280: Add pmg1110 regulators for sc7280-crd
3ebf11fa4a35 arm64: dts: qcom: sc7280-crd: Add Touchscreen and touchpad support
248da168fbae arm64: dts: qcom: sc7280: Define EC and H1 nodes for IDP/CRD
427b249504ea arm64: dts: qcom: sc7280-crd: Add device tree files for CRD

You have 2 commits specifically touching this file and you have 3
touching the platform. Your change touches only the single board, so it
should match the two.

As said before, your subject is too noisy, you can express this change
with less words. Something like "...: Override Bluetooth vddio" completely
covers the "what" of this patch, in 54 characters.

> As IO regulator varies in different SC7280 platforms
> updating this handler in individual platform bluetooth node.
> 

"Bluetooth vddio in the CRD differs from that in the IDP, override it."

Makes it clear what area is touched, what value is overriden and why
it's overriden.

Regards,
Bjorn

> Signed-off-by: Sai Teja Aluvala <quic_saluvala@...cinc.com>
> ---
> v4: updated commit text
> v3: Updated commit text to reflect the change
> v2: updated reviewer comments.
> v1: intial patch
> ---
> ---
>  arch/arm64/boot/dts/qcom/sc7280-crd.dts | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc7280-crd.dts b/arch/arm64/boot/dts/qcom/sc7280-crd.dts
> index e2efbdd..6cbbddc 100644
> --- a/arch/arm64/boot/dts/qcom/sc7280-crd.dts
> +++ b/arch/arm64/boot/dts/qcom/sc7280-crd.dts
> @@ -35,6 +35,10 @@
>  	};
>  };
>  
> +&bluetooth {
> +	vddio-supply = <&vreg_l18b_1p8>;
> +};
> +
>  ap_tp_i2c: &i2c0 {
>  	status = "okay";
>  	clock-frequency = <400000>;
> -- 
> QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc.
>