From: Matrix Screen Controller maintainers
Subject: [PATCH] arm64: dts: walnutpi: keep AXP313A DLDO1 at boot voltage

The WalnutPi U-Boot board description keeps DLDO1 enabled at 3.3V for
VCC-IO.  Describe that rail as always-on after switching the Linux PMIC
binding to AXP313A so regulator cleanup cannot disable it as unused.

---
 arch/arm64/boot/dts/allwinner/sun50i-h616-walnutpi-1b.dts | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h616-walnutpi-1b.dts b/arch/arm64/boot/dts/allwinner/sun50i-h616-walnutpi-1b.dts
--- a/arch/arm64/boot/dts/allwinner/sun50i-h616-walnutpi-1b.dts
+++ b/arch/arm64/boot/dts/allwinner/sun50i-h616-walnutpi-1b.dts
@@ -328 +328,8 @@
+			reg_dldo1: dldo1 {
+				regulator-always-on;
+				regulator-min-microvolt = <3300000>;
+				regulator-max-microvolt = <3300000>;
+				regulator-name = "vcc3v3";
+			};
+
-			reg_dcdc2: dcdc2 {
+			reg_dcdc2: dcdc2 {
-- 
2.39.2