linux-kernel - [PATCH V5 2/3] arm64: dts: qcom: ipq9574: Add SMPA1 regulator node

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Date:   Wed, 17 May 2023 22:55:26 +0530
From:   Devi Priya <quic_devipriy@...cinc.com>
To:     <agross@...nel.org>, <andersson@...nel.org>,
        <konrad.dybcio@...aro.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
        <linux-arm-msm@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
CC:     <quic_srichara@...cinc.com>, <quic_sjaganat@...cinc.com>,
        <quic_kathirav@...cinc.com>, <quic_arajkuma@...cinc.com>,
        <quic_anusha@...cinc.com>
Subject: [PATCH V5 2/3] arm64: dts: qcom: ipq9574: Add SMPA1 regulator node

Add support for SMPA1 regulator node in IPQ9574.

Reviewed-by: Konrad Dybcio <konrad.dybcio@...aro.org>
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 V5:
	- Picked up the R-b tag

 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 7be578017bf7..1a35fbc42f8c 100644
--- a/arch/arm64/boot/dts/qcom/ipq9574-rdp433.dts
+++ b/arch/arm64/boot/dts/qcom/ipq9574-rdp433.dts
@@ -43,6 +43,25 @@
 	};
 };
 
+&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.
+		 * Update the regulator-min-microvolt with SVS voltage of 725mV so that
+		 * the regulators are brought up with 725mV which is sufficient for all the
+		 * corner parts to operate at 800MHz
+		 */
+			regulator-min-microvolt = <725000>;
+			regulator-max-microvolt = <1075000>;
+		};
+	};
+};
+
 &sdhc_1 {
 	pinctrl-0 = <&sdc_default_state>;
 	pinctrl-names = "default";
-- 
2.17.1