linux-kernel - Re: [PATCH v3 2/2] arm64: dts: qcom: Add PCIe3 and PCIe5 regulators for HAMAO-IOT-EVK board

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Message-ID: <rakvukrdsb3vpr4k22hgvbr2yc65me32uezwrqgn2573kblirt@7q7pgr3nkvso>
Date: Wed, 12 Nov 2025 23:16:59 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Ziyue Zhang <ziyue.zhang@....qualcomm.com>
Cc: andersson@...nel.org, konradybcio@...nel.org, robh@...nel.org,
        krzk+dt@...nel.org, conor+dt@...nel.org, jingoohan1@...il.com,
        mani@...nel.org, lpieralisi@...nel.org, kwilczynski@...nel.org,
        bhelgaas@...gle.com, johan+linaro@...nel.org, vkoul@...nel.org,
        kishon@...nel.org, neil.armstrong@...aro.org, abel.vesa@...aro.org,
        kw@...ux.com, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-pci@...r.kernel.org, linux-phy@...ts.infradead.org,
        qiang.yu@....qualcomm.com, krishna.chundru@....qualcomm.com,
        quic_vbadigan@...cinc.com
Subject: Re: [PATCH v3 2/2] arm64: dts: qcom: Add PCIe3 and PCIe5 regulators
 for HAMAO-IOT-EVK board

On Wed, Nov 12, 2025 at 05:03:16PM +0800, Ziyue Zhang wrote:
> HAMAO IoT EVK uses PCIe5 to connect an SDX65 module for WWAN functionality
> and PCIe3 to connect a SATA controller. These interfaces require multiple
> voltage rails: PCIe5 needs 3.3V supplied by vreg_wwan, while PCIe3 requires
> 12V, 3.3V, and 3.3V AUX rails, controlled via PMIC GPIOs.
> 
> Add the required fixed regulators with related pin configuration, and
> connect them to the PCIe3 and PCIe5 ports to ensure proper power for the
> SDX65 module and SATA controller.
> 
> Signed-off-by: Ziyue Zhang <ziyue.zhang@....qualcomm.com>
> Reviewed-by: Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>
> ---
>  arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts | 83 ++++++++++++++++++++++
>  1 file changed, 83 insertions(+)
> 
> +&pmc8380_3_gpios {
> +	pm_sde7_aux_3p3_en: pcie-aux-3p3-default-state {

What is sde7? Other than that:


Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>



> +		pins = "gpio8";
> +		function = "normal";
> +		output-enable;
> +		output-high;
> +		bias-pull-down;
> +		power-source = <0>;
> +	};
> +
> +	pm_sde7_main_3p3_en: pcie-main-3p3-default-state {
> +		pins = "gpio6";
> +		function = "normal";
> +		output-enable;
> +		output-high;
> +		bias-pull-down;
> +		power-source = <0>;
> +	};
> +};
> +
>  &pmc8380_5_gpios {
>  	usb0_pwr_1p15_reg_en: usb0-pwr-1p15-reg-en-state {
>  		pins = "gpio8";
> -- 
> 2.34.1
> 

-- 
With best wishes
Dmitry