[PATCH 5/5] riscv: ae350: dts: Add missing "u-boot, dm-spl" for SPL config

[Bin Meng <bmeng.cn@gmail.com>]

At present the AE350 SPL defconfig is using OF_PRIOR_STAGE. The
intention was to use gdb to load device tree before running U-Boot
SPL/proper from RAM. When we switch to OF_SEPARATE we will have to
use our own DT but without "u-boot,dm-spl" in several essential
nodes, SPL does not boot.

Let's add all the required "u-boot,dm-spl" for SPL config.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
---

 arch/riscv/dts/ae350-u-boot.dtsi | 52 ++++++++++++++++++++++++++++++++
 arch/riscv/dts/ae350_32.dts      |  1 +
 arch/riscv/dts/ae350_64.dts      |  1 +
 3 files changed, 54 insertions(+)
 create mode 100644 arch/riscv/dts/ae350-u-boot.dtsi

diff --git a/arch/riscv/dts/ae350-u-boot.dtsi b/arch/riscv/dts/ae350-u-boot.dtsi
new file mode 100644
index 0000000000..0d4201cfae
--- /dev/null
+++ b/arch/riscv/dts/ae350-u-boot.dtsi
@@ -0,0 +1,52 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+
+/ {
+	cpus {
+		u-boot,dm-spl;
+		CPU0: cpu@0 {
+			u-boot,dm-spl;
+			CPU0_intc: interrupt-controller {
+				u-boot,dm-spl;
+			};
+		};
+		CPU1: cpu@1 {
+			u-boot,dm-spl;
+			CPU1_intc: interrupt-controller {
+				u-boot,dm-spl;
+			};
+		};
+		CPU2: cpu@2 {
+			u-boot,dm-spl;
+			CPU2_intc: interrupt-controller {
+				u-boot,dm-spl;
+			};
+		};
+		CPU3: cpu@3 {
+			u-boot,dm-spl;
+			CPU3_intc: interrupt-controller {
+				u-boot,dm-spl;
+			};
+		};
+	};
+
+	memory@0 {
+		u-boot,dm-spl;
+	};
+
+	soc {
+		u-boot,dm-spl;
+
+		plic1: interrupt-controller@e6400000 {
+			u-boot,dm-spl;
+		};
+
+		plmt0@e6000000 {
+			u-boot,dm-spl;
+		};
+	};
+
+	serial0: serial@f0300000 {
+		u-boot,dm-spl;
+	};
+
+};
diff --git a/arch/riscv/dts/ae350_32.dts b/arch/riscv/dts/ae350_32.dts
index 70576846f2..083f676333 100644
--- a/arch/riscv/dts/ae350_32.dts
+++ b/arch/riscv/dts/ae350_32.dts
@@ -3,6 +3,7 @@
 /dts-v1/;
 
 #include "binman.dtsi"
+#include "ae350-u-boot.dtsi"
 
 / {
 	#address-cells = <1>;
diff --git a/arch/riscv/dts/ae350_64.dts b/arch/riscv/dts/ae350_64.dts
index 564e94a1db..74cff9122d 100644
--- a/arch/riscv/dts/ae350_64.dts
+++ b/arch/riscv/dts/ae350_64.dts
@@ -3,6 +3,7 @@
 /dts-v1/;
 
 #include "binman.dtsi"
+#include "ae350-u-boot.dtsi"
 
 / {
 	#address-cells = <2>;
-- 
2.25.1