[PATCH 7/7] arm64: dts: qcom: sm8350-hdk: describe WiFi/BT chip

[Dmitry Baryshkov]

On Thu, Jun 11, 2026 at 02:09:27PM +0200, Konrad Dybcio wrote:
> On 6/1/26 11:46 AM, Dmitry Baryshkov wrote:
> > The SM8350 HDK has onboard WiFi/BT chip, WCN6851. It is an earlier
> > version of well-known WCN6855 WiFI/BT SoC. Describe the PMU, BT and WiFI
> > parts of the device.
> 
> [...]
> 
> > +	wcn6855-pmu {
> > +		compatible = "qcom,wcn6851-pmu", "qcom,wcn6855-pmu";
> > +
> > +		pinctrl-0 = <&bt_en>, <&wlan_en>, <&swctrl>;
> > +		pinctrl-names = "default";
> > +
> > +		wlan-enable-gpios = <&tlmm 64 GPIO_ACTIVE_HIGH>;
> > +		bt-enable-gpios = <&tlmm 65 GPIO_ACTIVE_HIGH>;
> > +		swctrl-gpios = <&tlmm 153 GPIO_ACTIVE_HIGH>;
> > +
> > +		vddio-supply = <&vreg_s10b_1p8>;
> > +		vddaon-supply = <&vreg_s11b_0p95>;
> > +		vddpmu-supply = <&vreg_s11b_0p95>;
> > +		vddpmumx-supply = <&vreg_s2e_0p85>;
> > +		vddpmucx-supply = <&vreg_s11b_0p95>;
> > +		vddrfa0p95-supply = <&vreg_s11b_0p95>;
> > +		vddrfa1p3-supply = <&vreg_s12b_1p25>;
> > +		vddrfa1p9-supply = <&vreg_s1c_1p86>;
> > +		vddpcie1p3-supply = <&vreg_s12b_1p25>;
> > +		vddpcie1p9-supply = <&vreg_s1c_1p86>;
> 
> [...]
> 
> > @@ -373,6 +437,13 @@ vreg_l7e_2p8: ldo7 {
> >  			regulator-name = "vreg_l7e_2p8";
> >  			regulator-min-microvolt = <2800000>;
> >  			regulator-max-microvolt = <2800000>;
> > +
> > +			/*
> > +			 * This is used by the RF front-end for which there is
> > +			 * no way to represent it in DT (yet?).
> > +			 */
> > +			regulator-boot-on;
> > +			regulator-always-on;
> 
> msm-5.4 maps this to bt-vdd-asd-supply (asd being a keyboard smash,
> perhaps?) - what is its actual use?

WiFI/BT RF front-end, a separate chip containing amplifiers, couplers,
etc.

It is a separate chip (or a module), it is not powered on by the PMU,
etc.

-- 
With best wishes
Dmitry