linux-kernel - Re: [PATCH V3 4/5] arm64: dts: qcom: ipq9574: Add SMPA1 regulator node

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Date:   Thu, 6 Apr 2023 21:47:20 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Devi Priya <quic_devipriy@...cinc.com>, agross@...nel.org,
        andersson@...nel.org, lgirdwood@...il.com, broonie@...nel.org,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Cc:     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 4/5] arm64: dts: qcom: ipq9574: Add SMPA1 regulator
 node



On 6.04.2023 09:00, Devi Priya wrote:
> Add support for SMPA1 regulator node in IPQ9574.
> 
> Co-developed-by: Praveenkumar I <quic_ipkumar@...cinc.com>
> Signed-off-by: Praveenkumar I <quic_ipkumar@...cinc.com>
> Signed-off-by: Devi Priya <quic_devipriy@...cinc.com>
> ---
>  Changes in V3:
> 	- Updated the regulator-min-microvolt with the SVS voltage 725000uV
> 
>  arch/arm64/boot/dts/qcom/ipq9574-rdp433.dts | 19 +++++++++++++++++++
>  1 file changed, 19 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/ipq9574-rdp433.dts b/arch/arm64/boot/dts/qcom/ipq9574-rdp433.dts
> index 3ae38cf327ea..06f579b1c590 100644
> --- a/arch/arm64/boot/dts/qcom/ipq9574-rdp433.dts
> +++ b/arch/arm64/boot/dts/qcom/ipq9574-rdp433.dts
> @@ -44,6 +44,25 @@
>  	};
>  };
>  
> +&rpm_requests {
> +	regulators {
> +		compatible = "qcom,rpm-mp5496-regulators";
> +
> +		ipq9574_s1: s1 {
> +		/*
> +		 * During kernel bootup, the SoC runs at 800MHz with 875mV set by the bootloaders.
> +		 * During regulator registration, kernel not knowing the initial voltage,
> +		 * considers it as zero and brings up the regulators with minimum supported voltage.

> +		 * Updating the regulator-min-microvolt with SVS voltage of 725000uV so that
s/Updating/Update
s/725000uV/725mV here and below (for consistency with the first mention
of 800mV)

Konrad
> +		 * the regulators are brought up with 725000uV which is sufficient for all the
> +		 * corner parts to operate at 800MHz
> +		 */
> +			regulator-min-microvolt = <725000>;
> +			regulator-max-microvolt = <1075000>;
> +		};
> +	};
> +};
> +
>  &pcie1_phy {
>  	status = "okay";
>  };