linux-kernel - Re: [PATCH v4 02/10] arm64: dts: qcom: qcs6490-rb3gen2: Add TC956x PCIe switch node

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Message-ID: <acqkh4isxn5e7pxbd22pvb2rbs7zhjnrcjaojomilvqaxwfz5o@kqkr4cn7qovs>
Date: Fri, 14 Mar 2025 13:03:13 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        chaitanya chundru <quic_krichai@...cinc.com>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        cros-qcom-dts-watchers@...omium.org, Jingoo Han <jingoohan1@...il.com>,
        Bartosz Golaszewski <brgl@...ev.pl>, quic_vbadigan@...cnic.com,
        amitk@...nel.org, dmitry.baryshkov@...aro.org,
        linux-pci@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        jorge.ramirez@....qualcomm.com
Subject: Re: [PATCH v4 02/10] arm64: dts: qcom: qcs6490-rb3gen2: Add TC956x
 PCIe switch node

On Tue, Feb 25, 2025 at 03:03:59PM +0530, Krishna Chaitanya Chundru wrote:
> Add a node for the TC956x PCIe switch, which has three downstream ports.
> Two embedded Ethernet devices are present on one of the downstream ports.
> 
> Power to the TC956x is supplied through two LDO regulators, controlled by
> two GPIOs, which are added as fixed regulators. Configure the TC956x
> through I2C.
> 
> Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>
> Reviewed-by: Bjorn Andersson <andersson@...nel.org>
> Acked-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> ---
>  arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts | 116 +++++++++++++++++++++++++++
>  arch/arm64/boot/dts/qcom/sc7280.dtsi         |   2 +-
>  2 files changed, 117 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts b/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
> index 7a36c90ad4ec..13dbb24a3179 100644
> --- a/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
> +++ b/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
> @@ -218,6 +218,31 @@ vph_pwr: vph-pwr-regulator {
>  		regulator-min-microvolt = <3700000>;
>  		regulator-max-microvolt = <3700000>;
>  	};
> +
> +	vdd_ntn_0p9: regulator-vdd-ntn-0p9 {
> +		compatible = "regulator-fixed";
> +		regulator-name = "VDD_NTN_0P9";
> +		gpio = <&pm8350c_gpios 2 GPIO_ACTIVE_HIGH>;
> +		regulator-min-microvolt = <899400>;
> +		regulator-max-microvolt = <899400>;
> +		enable-active-high;
> +		pinctrl-0 = <&ntn_0p9_en>;
> +		pinctrl-names = "default";
> +		regulator-enable-ramp-delay = <4300>;
> +	};
> +
> +	vdd_ntn_1p8: regulator-vdd-ntn-1p8 {
> +		compatible = "regulator-fixed";
> +		regulator-name = "VDD_NTN_1P8";
> +		gpio = <&pm8350c_gpios 3 GPIO_ACTIVE_HIGH>;
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <1800000>;
> +		enable-active-high;
> +		pinctrl-0 = <&ntn_1p8_en>;
> +		pinctrl-names = "default";
> +		regulator-enable-ramp-delay = <10000>;
> +	};
> +
>  };
>  
>  &apps_rsc {
> @@ -735,6 +760,75 @@ &pcie1_phy {
>  	status = "okay";
>  };
>  
> +&pcie1_port {
> +	pcie@0,0 {
> +		compatible = "pci1179,0623", "pciclass,0604";
> +		reg = <0x10000 0x0 0x0 0x0 0x0>;
> +		#address-cells = <3>;
> +		#size-cells = <2>;
> +
> +		device_type = "pci";
> +		ranges;
> +		bus-range = <0x2 0xff>;
> +
> +		vddc-supply = <&vdd_ntn_0p9>;
> +		vdd18-supply = <&vdd_ntn_1p8>;
> +		vdd09-supply = <&vdd_ntn_0p9>;
> +		vddio1-supply = <&vdd_ntn_1p8>;
> +		vddio2-supply = <&vdd_ntn_1p8>;
> +		vddio18-supply = <&vdd_ntn_1p8>;
> +
> +		i2c-parent = <&i2c0 0x77>;
> +
> +		reset-gpios = <&pm8350c_gpios 1 GPIO_ACTIVE_LOW>;

Please add pinctrl blck for this reset line.

-- 
With best wishes
Dmitry