[PATCH] arm64: dts: rockchip: Fix vcc_sdio regulator max voltage on Pinebook Pro

[Hugo Osvaldo Barrera]

The vcc_sdio regulator supports 1.8V to 3.4V output range according to
its datasheet.

The current DT incorrectly limits the max voltage to 3.0V. This limit
causes issues issues downstream with u-boot, which refuses to apply the
out-of range value, and falls back to the minimum in that range: 1.8V.
This is insufficient to power the SD card, so driver initialisation
fails and booting from it does not work.

Set regulator-max-microvolt to 3400000 µV to match hardware capability.
This matches the rk3399-orangepi for the same regulator.

Signed-off-by: Hugo Osvaldo Barrera <hugo at whynothugo.nl>
---
 arch/arm64/boot/dts/rockchip/rk3399-pinebook-pro.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-pinebook-pro.dts b/arch/arm64/boot/dts/rockchip/rk3399-pinebook-pro.dts
index b5c05928142c..f21fcdc1b49a 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-pinebook-pro.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-pinebook-pro.dts
@@ -526,7 +526,7 @@ vcc_sdio: LDO_REG4 {
 				regulator-always-on;
 				regulator-boot-on;
 				regulator-min-microvolt = <1800000>;
-				regulator-max-microvolt = <3000000>;
+				regulator-max-microvolt = <3400000>;
 
 				regulator-state-mem {
 					regulator-on-in-suspend;
-- 
2.54.0