linux-kernel - Re: [PATCH v1] arm64: dts: qcom: ipq5424: add gpio regulator for cpu power supply

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Message-ID: <3xxdcekqzn6hxc2zoavsge3s53czavpfs2evc3ot37aivw4rib@uee2g2mem3hx>
Date: Thu, 23 Oct 2025 17:12:22 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Manikanta Mylavarapu <quic_mmanikan@...cinc.com>
Cc: andersson@...nel.org, konradybcio@...nel.org, robh@...nel.org,
        krzk+dt@...nel.org, conor+dt@...nel.org, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        quic_srichara@...cinc.com, quic_varada@...cinc.com,
        kathiravan.thirumoorthy@....qualcomm.com
Subject: Re: [PATCH v1] arm64: dts: qcom: ipq5424: add gpio regulator for cpu
 power supply

On Thu, Oct 23, 2025 at 09:32:24AM +0530, Manikanta Mylavarapu wrote:
> Add a GPIO-controlled regulator node for the CPU rail on the
> IPQ5424 RDP466 platform. This regulator supports two voltage
> levels 850mV and 1000mV.
> 
> Update CPU nodes to reference the regulator via the `cpu-supply`
> property, and add the required pinctrl configuration for GPIO17.
> 
> Signed-off-by: Manikanta Mylavarapu <quic_mmanikan@...cinc.com>
> ---
>  arch/arm64/boot/dts/qcom/ipq5424-rdp466.dts | 24 +++++++++++++++++++++
>  arch/arm64/boot/dts/qcom/ipq5424.dtsi       |  4 ++++
>  2 files changed, 28 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/ipq5424-rdp466.dts b/arch/arm64/boot/dts/qcom/ipq5424-rdp466.dts
> index 738618551203..6d14eb2fe821 100644
> --- a/arch/arm64/boot/dts/qcom/ipq5424-rdp466.dts
> +++ b/arch/arm64/boot/dts/qcom/ipq5424-rdp466.dts
> @@ -46,6 +46,23 @@ led-0 {
>  		};
>  	};
>  
> +	vreg_apc: regulator-vreg-apc {
> +		compatible = "regulator-gpio";
> +		regulator-name = "vreg_apc";
> +		regulator-min-microvolt = <850000>;
> +		regulator-max-microvolt = <1000000>;
> +		regulator-boot-on;
> +		regulator-always-on;
> +		regulator-ramp-delay = <250>;
> +
> +		gpios = <&tlmm 17 GPIO_ACTIVE_HIGH>;
> +		gpios-states = <1>;
> +		states = <850000 0>, <1000000 1>;
> +
> +		pinctrl-0 = <&regulator_gpio_default>;
> +		pinctrl-names = "default";

'vreg' > 'usb'

> +	};
> +
>  	vreg_misc_3p3: regulator-usb-3p3 {
>  		compatible = "regulator-fixed";
>  		regulator-min-microvolt = <3300000>;
-- 
With best wishes
Dmitry