linux-kernel - Re: [PATCH v4 2/3] arm64: dts: qcom: sc8280xp-crd: enable bluetooth

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Message-ID: <Zv549R8j7SRoA3uS@hovoldconsulting.com>
Date: Thu, 3 Oct 2024 12:59:01 +0200
From: Johan Hovold <johan@...nel.org>
To: Bartosz Golaszewski <brgl@...ev.pl>
Cc: Bjorn Andersson <andersson@...nel.org>,
	Konrad Dybcio <konradybcio@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Kalle Valo <kvalo@...nel.org>,
	linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
	Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Subject: Re: [PATCH v4 2/3] arm64: dts: qcom: sc8280xp-crd: enable bluetooth

On Mon, Sep 30, 2024 at 12:30:38PM +0200, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> 
> Add the bluetooth node for sc8280xp-crd and make it consume the outputs
> from the PMU as per the new DT bindings contract.
> 
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>

> +&uart2 {
> +	pinctrl-0 = <&uart2_default>;
> +	pinctrl-names = "default";
> +
> +	status = "okay";
> +
> +	bluetooth {
> +		compatible = "qcom,wcn6855-bt";
> +
> +		vddrfacmn-supply = <&vreg_pmu_rfa_cmn_0p8>;
> +		vddaon-supply = <&vreg_pmu_aon_0p8>;
> +		vddwlcx-supply = <&vreg_pmu_wlcx_0p8>;
> +		vddwlmx-supply = <&vreg_pmu_wlmx_0p8>;
> +		vddbtcmx-supply = <&vreg_pmu_btcmx_0p8>;
> +		vddrfa0p8-supply = <&vreg_pmu_rfa_0p8>;
> +		vddrfa1p2-supply = <&vreg_pmu_rfa_1p2>;
> +		vddrfa1p8-supply = <&vreg_pmu_rfa_1p7>;
> +	};
> +};
> +
> +

nit: stray newline

>  &uart17 {
>  	compatible = "qcom,geni-debug-uart";
>  
> @@ -892,6 +915,13 @@ hastings_reg_en: hastings-reg-en-state {
>  &tlmm {
>  	gpio-reserved-ranges = <74 6>, <83 4>, <125 2>, <128 2>, <154 7>;
>  
> +	bt_en: bt-en-state {
> +		pins = "gpio133";
> +		function = "gpio";
> +		drive-strength = <16>;

Why increase the drive strength? 

I see the bootfw has configured the wlan_en this way (as we discussed
before) even if it should not be needed.

Please add back the drive strength in the previous patch as well even if
you want to configure it the same way as the fw did for now.

> +		bias-disable;
> +	};

Johan