[PATCH V4 07/22] ARM: dts: stm32: Repair PMIC configuration on AV96

[Marek Vasut <marex@denx.de>]

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.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: Patrice Chotard <patrice.chotard@st.com>
Cc: Patrick Delaunay <patrick.delaunay@st.com>
Cc: linux-stm32@st-md-mailman.stormreply.com
To: linux-arm-kernel@lists.infradead.org
---
V2: Model the Enpirion EP53A8LQI on the DHCOR SoM as a fixed regulator
V3: Move this before the SDMMC2 patch, as there is now a dependency
V4: Rebase on stm32-next
---
 arch/arm/boot/dts/stm32mp157a-avenger96.dts | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/arch/arm/boot/dts/stm32mp157a-avenger96.dts b/arch/arm/boot/dts/stm32mp157a-avenger96.dts
index a6f21ac5a94a..260410461dc8 100644
--- a/arch/arm/boot/dts/stm32mp157a-avenger96.dts
+++ b/arch/arm/boot/dts/stm32mp157a-avenger96.dts
@@ -91,6 +91,17 @@ sd_switch: regulator-sd_switch {
 		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 {
@@ -177,7 +188,7 @@ regulators {
 
 			vddcore: buck1 {
 				regulator-name = "vddcore";
-				regulator-min-microvolt = <1200000>;
+				regulator-min-microvolt = <800000>;
 				regulator-max-microvolt = <1350000>;
 				regulator-always-on;
 				regulator-initial-mode = <0>;
@@ -195,8 +206,8 @@ vdd_ddr: buck2 {
 
 			vdd: buck3 {
 				regulator-name = "vdd";
-				regulator-min-microvolt = <3300000>;
-				regulator-max-microvolt = <3300000>;
+				regulator-min-microvolt = <2900000>;
+				regulator-max-microvolt = <2900000>;
 				regulator-always-on;
 				regulator-initial-mode = <0>;
 				regulator-over-current-protection;
@@ -274,6 +285,7 @@ vbus_otg: pwr_sw1 {
 				regulator-name = "vbus_otg";
 				interrupts = <IT_OCP_OTG 0>;
 				interrupt-parent = <&pmic>;
+				regulator-active-discharge = <1>;
 			};
 
 			vbus_sw: pwr_sw2 {
@@ -304,7 +316,7 @@ &iwdg2 {
 };
 
 &pwr_regulators {
-	vdd-supply = <&vdd>;
+	vdd-supply = <&vdd_io>;
 	vdd_3v3_usbfs-supply = <&vdd_usb>;
 };
 
-- 
2.25.1


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