[PATCH 1/2] arm64: dts: rockchip: correct uart mux for Radxa ZERO 3

[Ed Wildgoose <lists@wildgooses.com>]

The rk3566 has multiplexed pins and the uarts can be moved to a choice
of 2 pin groups. The default rk356x-base.dtsi appears to default to mux0
for all uarts, however, specific hardware might choose to implement
alternatives

The Radxa zero 3 shows that is uses M1 for uarts:
- uart4
- uart5
- uart9

These aren't normally enabled, but we should at least correct the
default pinctrl definitions. Without these changes there will be
conflicts with mmc0/mmc1, leading to the SD or eMMC going missing.

Signed-off-by: Ed Wildgoose <lists@wildgooses.com>
---
 .../boot/dts/rockchip/rk3566-radxa-zero-3.dtsi    | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3566-radxa-zero-3.dtsi b/arch/arm64/boot/dts/rockchip/rk3566-radxa-zero-3.dtsi
index 1ee5d96a4..41b3c4403 100644
--- a/arch/arm64/boot/dts/rockchip/rk3566-radxa-zero-3.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3566-radxa-zero-3.dtsi
@@ -492,6 +492,21 @@ &uart2 {
 	status = "okay";
 };
 
+&uart4{
+    pinctrl-names = "default";
+    pinctrl-0 = <&uart4m1_xfer>;
+};
+
+&uart5 {
+    pinctrl-names = "default";
+    pinctrl-0 = <&uart5m1_xfer>;
+};
+
+&uart9 {
+    pinctrl-names = "default";
+    pinctrl-0 = <&uart9m1_xfer>;
+};
+
 &usb_host0_xhci {
 	status = "okay";
 };
-- 
2.49.0


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