From: Marek Vasut <marex@denx.de>
Date: Tue, 31 Mar 2020 17:51:34 +0000 (+0200)
Subject: ARM: dts: stm32: Repair PMIC configuration on AV96
X-Git-Url: http://git.dujemihanovic.xyz/img/static/git-favicon.png?a=commitdiff_plain;h=2f3c4b8a0f303edbea9fc112a49e546cf03776b0;p=u-boot.git

ARM: dts: stm32: Repair PMIC configuration on AV96

The core and vdd PMIC buck regulators were misconfigured, which caused
instability of the board and malfunction of high-speed interfaces, like
the RGMII. Configure the PMIC correctly to repair these problems. Also,
model the missing Enpirion EP53A8LQI on the DHCOR SoM as a fixed regulator.

Reviewed-by: Patrice Chotard <patrice.chotard@st.com>
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Cc: Patrick Delaunay <patrick.delaunay@st.com>
Cc: Patrice Chotard <patrice.chotard@st.com>
---

diff --git a/arch/arm/dts/stm32mp157a-avenger96.dts b/arch/arm/dts/stm32mp157a-avenger96.dts
index 27d407a867..1f32395e71 100644
--- a/arch/arm/dts/stm32mp157a-avenger96.dts
+++ b/arch/arm/dts/stm32mp157a-avenger96.dts
@@ -92,6 +92,17 @@
 		states = <1800000 0x1>,
 			 <2900000 0x0>;
 	};
+
+	/* Enpirion EP3A8LQI U2 on the DHCOR */
+	vdd_io: regulator-buck-io {
+		compatible = "regulator-fixed";
+		regulator-name = "buck-io";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+		regulator-always-on;
+		regulator-boot-on;
+		vin-supply = <&vdd>;
+	};
 };
 
 &ethernet0 {
@@ -168,7 +179,7 @@
 
 			vddcore: buck1 {
 				regulator-name = "vddcore";
-				regulator-min-microvolt = <1200000>;
+				regulator-min-microvolt = <800000>;
 				regulator-max-microvolt = <1350000>;
 				regulator-always-on;
 				regulator-initial-mode = <0>;
@@ -186,8 +197,8 @@
 
 			vdd: buck3 {
 				regulator-name = "vdd";
-				regulator-min-microvolt = <3300000>;
-				regulator-max-microvolt = <3300000>;
+				regulator-min-microvolt = <2900000>;
+				regulator-max-microvolt = <2900000>;
 				regulator-always-on;
 				st,mask_reset;
 				regulator-initial-mode = <0>;
@@ -269,6 +280,7 @@
 				regulator-name = "vbus_otg";
 				interrupts = <IT_OCP_OTG 0>;
 				interrupt-parent = <&pmic>;
+				regulator-active-discharge = <1>;
 			};
 
 			vbus_sw: pwr_sw2 {
@@ -305,7 +317,7 @@
 };
 
 &pwr_regulators {
-	vdd-supply = <&vdd>;
+	vdd-supply = <&vdd_io>;
 	vdd_3v3_usbfs-supply = <&vdd_usb>;
 };