Hi, On Mon, Jun 19, 2023 at 6:14 AM Konrad Dybcio <konrad.dybcio@xxxxxxxxxx> wrote: > > On 17.06.2023 19:15, Krzysztof Kozlowski wrote: > > Bluetooth requires VDDIO supply. Due to lack of schematics provide > > something dummy to satisfy `dtbs_check`: > > > > sc7280-crd-r3.dtb: bluetooth: 'vddio-supply' is a required property > > > > Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx> > > --- > For this: > > Reviewed-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx> > > +CC Doug to perhaps fix this properly (though I think we should have got > it through the cros list anyway) > > Konrad > > arch/arm64/boot/dts/qcom/sc7280-crd-r3.dts | 11 +++++++++++ > > 1 file changed, 11 insertions(+) > > > > diff --git a/arch/arm64/boot/dts/qcom/sc7280-crd-r3.dts b/arch/arm64/boot/dts/qcom/sc7280-crd-r3.dts > > index afae7f46b050..b1aa5b0ee95c 100644 > > --- a/arch/arm64/boot/dts/qcom/sc7280-crd-r3.dts > > +++ b/arch/arm64/boot/dts/qcom/sc7280-crd-r3.dts > > @@ -24,6 +24,13 @@ aliases { > > chosen { > > stdout-path = "serial0:115200n8"; > > }; > > + > > + bt_vddio: regulator-bt-vddio { > > + compatible = "regulator-fixed"; > > + regulator-name = "bt-vddio"; > > + regulator-min-microvolt = <1800000>; > > + regulator-max-microvolt = <1800000>; > > + }; > > }; > > > > &apps_rsc { > > @@ -38,6 +45,10 @@ vreg_s1k_1p0: smps1 { > > }; > > }; > > > > +&bluetooth { > > + vddio-supply = <&bt_vddio>; > > +}; > > + I would have a hard time believing that the more correct fix wouldn't be: vddio-supply = <&vreg_l18b_1p8>; Specifically L18B is what we have on the newer CRD (the one that is considered a "herobrine" and includes Qcard) and also IDP2. In terms of timeline / similarities, CRD-rev3 falls in between IDP2 and newer CRD. These both agree on L18B. The only board that uses something different (L19B) is the very old IDP1. That being said, Qualcomm has never provided (at least to me) schematics for any given reference board. Whenever asked, I was always pointed at schematics that were said to be "close enough". Thus, I can't really give a definitive answer here. Even so, pointing at L18B seems to me to be 99% likely to be correct. If anyone reading actually has schematics, I think you can just look at what goes to the pad labelled "VDDPX_3". The datasheet I have shows that as "Pad group 3 (most peripherals)". If nothing else, that powers the pins connected to the UART that Bluetooth uses (along with a whole pile of other things in the system). -Doug