linux-kernel - Re: [PATCH V3 5/6] arm64: dts: qcom: ipq9574: Enable PCIe PHYs and controllers

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Message-ID: <CAA8EJpqx1jv_xEnS-2rOOGCtEB=1vo477H7XLGGvH=o7NHJD7w@mail.gmail.com>
Date:   Sat, 22 Apr 2023 03:13:39 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Devi Priya <quic_devipriy@...cinc.com>
Cc:     agross@...nel.org, andersson@...nel.org, konrad.dybcio@...aro.org,
        lpieralisi@...nel.org, kw@...ux.com, robh@...nel.org,
        bhelgaas@...gle.com, krzysztof.kozlowski+dt@...aro.org,
        mturquette@...libre.com, sboyd@...nel.org, mani@...nel.org,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
        linux-clk@...r.kernel.org, quic_srichara@...cinc.com,
        quic_sjaganat@...cinc.com, quic_kathirav@...cinc.com,
        quic_arajkuma@...cinc.com, quic_anusha@...cinc.com,
        quic_ipkumar@...cinc.com
Subject: Re: [PATCH V3 5/6] arm64: dts: qcom: ipq9574: Enable PCIe PHYs and controllers

On Fri, 21 Apr 2023 at 15:51, Devi Priya <quic_devipriy@...cinc.com> wrote:
>
> Enable the PCIe controller and PHY nodes corresponding to
> RDP 433.
>
> Signed-off-by: Devi Priya <quic_devipriy@...cinc.com>
> ---
>  Changes in V3:
>         - No change
>
>  arch/arm64/boot/dts/qcom/ipq9574-rdp433.dts | 62 +++++++++++++++++++++
>  1 file changed, 62 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/qcom/ipq9574-rdp433.dts b/arch/arm64/boot/dts/qcom/ipq9574-rdp433.dts
> index 7be578017bf7..3ae38cf327ea 100644
> --- a/arch/arm64/boot/dts/qcom/ipq9574-rdp433.dts
> +++ b/arch/arm64/boot/dts/qcom/ipq9574-rdp433.dts
> @@ -8,6 +8,7 @@
>
>  /dts-v1/;
>
> +#include <dt-bindings/gpio/gpio.h>
>  #include "ipq9574.dtsi"
>
>  / {
> @@ -43,6 +44,42 @@
>         };
>  };
>
> +&pcie1_phy {
> +       status = "okay";
> +};
> +
> +&pcie1 {
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&pcie_1_pin>;
> +
> +       perst-gpios = <&tlmm 26 GPIO_ACTIVE_LOW>;

Usually qcom PCIe hosts also define wake-gpios.

> +       status = "okay";
> +};
> +
> +&pcie2_phy {
> +       status = "okay";
> +};
> +
> +&pcie2 {
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&pcie_2_pin>;
> +
> +       perst-gpios = <&tlmm 29 GPIO_ACTIVE_LOW>;
> +       status = "okay";
> +};
> +
> +&pcie3_phy {
> +       status = "okay";
> +};
> +
> +&pcie3 {
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&pcie_3_pin>;
> +
> +       perst-gpios = <&tlmm 32 GPIO_ACTIVE_LOW>;
> +       status = "okay";
> +};
> +
>  &sdhc_1 {
>         pinctrl-0 = <&sdc_default_state>;
>         pinctrl-names = "default";
> @@ -60,6 +97,31 @@
>  };
>
>  &tlmm {
> +
> +       pcie_1_pin: pcie-1-state {
> +               pins = "gpio26";
> +               function = "gpio";
> +               drive-strength = <8>;
> +               bias-pull-down;
> +               output-low;

No clkreq and no wake gpios?

> +       };
> +
> +       pcie_2_pin: pcie-2-state {
> +               pins = "gpio29";
> +               function = "gpio";
> +               drive-strength = <8>;
> +               bias-pull-down;
> +               output-low;
> +       };
> +
> +       pcie_3_pin: pcie-3-state {
> +               pins = "gpio32";
> +               function = "gpio";
> +               drive-strength = <8>;
> +               bias-pull-up;
> +               output-low;
> +       };
> +
>         sdc_default_state: sdc-default-state {
>                 clk-pins {
>                         pins = "gpio5";
> --
> 2.17.1
>


-- 
With best wishes
Dmitry