Re: [PATCH v8 3/4] arm64: dts: qcom: sc7280: Add PCIe nodes for IDP board

[Stephen Boyd <swboyd@chromium.org>]

Quoting Prasad Malisetty (2021-09-17 10:15:46)
> diff --git a/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi b/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi
> index 99f9ee5..ee00df0 100644
> --- a/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi
> @@ -199,6 +199,39 @@
>         modem-init;
>  };
>
> +&pcie1 {
> +       status = "okay";
> +
> +       perst-gpio = <&tlmm 2 GPIO_ACTIVE_LOW>;
> +       pinctrl-0 = <&pcie1_default_state &nvme_ldo_enable_pin>;
> +};
> +
> +&pcie1_phy {
> +       status = "okay";
> +
> +       vdda-phy-supply = <&vreg_l10c_0p8>;
> +       vdda-pll-supply = <&vreg_l6b_1p2>;
> +};
> +
> +&pcie1_default_state {
> +       reset-n {
> +               pins = "gpio2";
> +               function = "gpio";
> +
> +               drive-strength = <16>;
> +               output-low;
> +               bias-disable;
> +       };
> +
> +       wake-n {
> +               pins = "gpio3";
> +               function = "gpio";
> +
> +               drive-strength = <2>;
> +               bias-pull-up;
> +       };

I think the previous round of this series Bjorn was saying that these
should be different nodes and tacked onto the pinctrl-0 list for the
pcie1 device instead of adding them as subnodes of the "default state".

> +};
> +
>  &pmk8350_vadc {
>         pmk8350_die_temp {
>                 reg = <PMK8350_ADC7_DIE_TEMP>;
> @@ -343,3 +376,10 @@
>                 bias-pull-up;
>         };
>  };
> +
> +&tlmm {
> +       nvme_ldo_enable_pin: nvme_ldo_enable_pin {

Please use dashes where you use underscores in node names

       nvme_ldo_enable_pin: nvme-ldo-enable-pin {

> +               function = "gpio";
> +               bias-pull-up;

Of course with that said, the name of this node makes it sound like this
is a gpio controlled regulator. Why not use that binding then and enable
the regulator either by default with regulator properties like
regulator-always-on and regulator-boot-enable and/or reference it from
the pcie device somehow so that it can be turned off during suspend?

> +       };
> +};