board: rockchip: Add Radxa Compute Module 3 IO Board
Radxa Compute Module 3(CM3) IO board an application board from Radxa
and is compatible with Raspberry Pi CM4 IO form factor.
Radxa CM3 needs to mount on top of this IO board in order to create
complete Radxa CM3 IO board platform.
Add support for Radxa CM3 IO Board defconfig and -u-boot.dtsi
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
diff --git a/arch/arm/dts/rk3566-radxa-cm3-io-u-boot.dtsi b/arch/arm/dts/rk3566-radxa-cm3-io-u-boot.dtsi
new file mode 100644
index 0000000..4e79173
--- /dev/null
+++ b/arch/arm/dts/rk3566-radxa-cm3-io-u-boot.dtsi
@@ -0,0 +1,18 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2021 Rockchip Electronics Co., Ltd
+ */
+
+#include "rk356x-u-boot.dtsi"
+
+/ {
+ chosen {
+ stdout-path = &uart2;
+ };
+};
+
+&uart2 {
+ clock-frequency = <24000000>;
+ bootph-all;
+ status = "okay";
+};