From 945ada9cb5e762c37af155a1ffdbe45560f99948 Mon Sep 17 00:00:00 2001
From: David Collins <collinsd@quicinc.com>
Date: Wed, 3 Nov 2021 16:11:50 -0700
Subject: [PATCH] ARM: dts: qcom: reduce L4B regulator min voltage to 880 mV
 for sdxlemur

PMX65 LDO 4 (L4B) loads are able to operate successfully with
L4B set to 880 mV.  Therefore, reduce the L4B minimum constraint
voltage to 880 mV.  This allows power to be saved when possible.

Also reduce the minimum voltage voted by USB and PCIe devices to
880 mV to achieve the desired power savings.

Change-Id: Ie9f76e65cac22290e85cfba3b7cf2cea4da3eee3
---
 qcom/sdxlemur-pcie.dtsi       | 2 +-
 qcom/sdxlemur-regulators.dtsi | 4 ++--
 qcom/sdxlemur-usb.dtsi        | 4 ++--
 qcom/sdxlemur.dtsi            | 2 +-
 4 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/qcom/sdxlemur-pcie.dtsi b/qcom/sdxlemur-pcie.dtsi
index 56b030f1335a..05b1db8be5e1 100644
--- a/qcom/sdxlemur-pcie.dtsi
+++ b/qcom/sdxlemur-pcie.dtsi
@@ -51,7 +51,7 @@
 		vreg-mx-supply = <&VDD_MXA_LEVEL>;
 
 		qcom,vreg-1p8-voltage-level = <1200000 1200000 30000>;
-		qcom,vreg-0p9-voltage-level = <912000 912000 132000>;
+		qcom,vreg-0p9-voltage-level = <912000 880000 132000>;
 		qcom,vreg-cx-voltage-level = <RPMH_REGULATOR_LEVEL_MAX
 						RPMH_REGULATOR_LEVEL_LOW_SVS 0>;
 		qcom,vreg-mx-voltage-level = <RPMH_REGULATOR_LEVEL_MAX
diff --git a/qcom/sdxlemur-regulators.dtsi b/qcom/sdxlemur-regulators.dtsi
index e4ce28c0af99..d765a90d2f71 100644
--- a/qcom/sdxlemur-regulators.dtsi
+++ b/qcom/sdxlemur-regulators.dtsi
@@ -217,9 +217,9 @@
 		L4B: pmx65_l4: regulator-pmx65-l4 {
 			regulator-name = "pmx65_l4";
 			qcom,set = <RPMH_REGULATOR_SET_ALL>;
-			regulator-min-microvolt = <912000>;
+			regulator-min-microvolt = <880000>;
 			regulator-max-microvolt = <912000>;
-			qcom,init-voltage = <912000>;
+			qcom,init-voltage = <880000>;
 			qcom,init-mode = <RPMH_REGULATOR_MODE_HPM>;
 		};
 	};
diff --git a/qcom/sdxlemur-usb.dtsi b/qcom/sdxlemur-usb.dtsi
index 12324c0bf30c..5d337b3be5fe 100644
--- a/qcom/sdxlemur-usb.dtsi
+++ b/qcom/sdxlemur-usb.dtsi
@@ -117,7 +117,7 @@
 		reg-names = "hsusb_phy_base",
 			"eud_enable_reg";
 		vdd-supply = <&pmx65_l4>;
-		qcom,vdd-voltage-level = <0 912000 912000>;
+		qcom,vdd-voltage-level = <0 880000 912000>;
 		vdda18-supply = <&pmx65_l5>;
 		vdda33-supply = <&pmx65_l10>;
 
@@ -138,7 +138,7 @@
 			"pcs_clamp_enable_reg";
 
 		vdd-supply = <&pmx65_l4>;
-		qcom,vdd-voltage-level = <0 912000 912000>;
+		qcom,vdd-voltage-level = <0 880000 912000>;
 		qcom,vdd-max-load-uA = <47900>;
 		core-supply = <&pmx65_l1>;
 		qcom,core-max-load-uA = <15000>;
diff --git a/qcom/sdxlemur.dtsi b/qcom/sdxlemur.dtsi
index f83839249eba..78a4a77dafab 100644
--- a/qcom/sdxlemur.dtsi
+++ b/qcom/sdxlemur.dtsi
@@ -943,7 +943,7 @@
 		vreg-mx-supply = <&VDD_MXA_LEVEL>;
 
 		qcom,vreg-1p8-voltage-level = <1200000 1200000 30000>;
-		qcom,vreg-0p9-voltage-level = <912000 912000 132000>;
+		qcom,vreg-0p9-voltage-level = <912000 880000 132000>;
 		qcom,vreg-mx-voltage-level = <RPMH_REGULATOR_LEVEL_MAX RPMH_REGULATOR_LEVEL_NOM 0>;
 
 		clocks = <&gcc GCC_PCIE_PIPE_CLK>,