linux-kernel - Re: [PATCH v2] arm64: dts: qcom: sc7280: setting the vddio supply for Bluetooth node on CRD

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Message-ID: <YgWwNiLDCZ0jEV30@builder.lan>
Date:   Thu, 10 Feb 2022 18:39:18 -0600
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Sai Teja Aluvala <quic_saluvala@...cinc.com>
Cc:     marcel@...tmann.org, johan.hedberg@...il.com, mka@...omium.org,
        linux-kernel@...r.kernel.org, linux-bluetooth@...r.kernel.org,
        quic_hemantg@...cinc.com, linux-arm-msm@...r.kernel.org,
        quic_bgodavar@...cinc.com, quic_rjliao@...cinc.com,
        quic_hbandi@...cinc.com, abhishekpandit@...omium.org,
        mcchou@...omium.org
Subject: Re: [PATCH v2] arm64: dts: qcom: sc7280: setting the vddio supply
 for Bluetooth node on CRD

On Tue 08 Feb 05:13 CST 2022, Sai Teja Aluvala wrote:

> setting the vddio supply for Bluetooth SoC WCN6750 node
> on SC7280 crd board
> 

While this does better describe what the change does, as Matthias
requested on v1, it fails to provide any information about why this
done.

Is vddio simply not powered on the IDP? Or did someone forget to add it
to the idp.dtsi?

Regards,
Bjorn

> Signed-off-by: Sai Teja Aluvala <quic_saluvala@...cinc.com>
> ---
>  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 cd2755c..53ea3b4 100644
> --- a/arch/arm64/boot/dts/qcom/sc7280-crd.dts
> +++ b/arch/arm64/boot/dts/qcom/sc7280-crd.dts
> @@ -23,6 +23,10 @@
>  	};
>  };
>  
> +&bluetooth {
> +	vddio-supply = <&vreg_l18b_1p8>;
> +};
> +
>  ap_tp_i2c: &i2c0 {
>  	status = "okay";
>  	clock-frequency = <400000>;
> -- 
> QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc.
>