[PATCH] riscv: dts: sophgo: add reserved memory node for CV1800B

[Inochi Amaoto]

The original dts of CV1800B has a weird memory length as it
contains reserved memory for coprocessor. Make this area a
separate node so it can get the real memory length.

Signed-off-by: Inochi Amaoto <inochiama at outlook.com>
---
 arch/riscv/boot/dts/sophgo/cv1800b-milkv-duo.dts | 12 +++++++++---
 arch/riscv/boot/dts/sophgo/cv1800b.dtsi          |  5 +++++
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/arch/riscv/boot/dts/sophgo/cv1800b-milkv-duo.dts b/arch/riscv/boot/dts/sophgo/cv1800b-milkv-duo.dts
index 3af9e34b3bc7..0b9128513357 100644
--- a/arch/riscv/boot/dts/sophgo/cv1800b-milkv-duo.dts
+++ b/arch/riscv/boot/dts/sophgo/cv1800b-milkv-duo.dts
@@ -23,9 +23,15 @@ chosen {
 		stdout-path = "serial0:115200n8";
 	};

-	memory at 80000000 {
-		device_type = "memory";
-		reg = <0x80000000 0x3f40000>;
+	reserved-memory {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+
+		coprocessor_rtos: region at 83f40000 {
+			reg = <0x83f40000 0xc0000>;
+			no-map;
+		};
 	};
 };

diff --git a/arch/riscv/boot/dts/sophgo/cv1800b.dtsi b/arch/riscv/boot/dts/sophgo/cv1800b.dtsi
index 165e9e320a8c..17ce8aa415a8 100644
--- a/arch/riscv/boot/dts/sophgo/cv1800b.dtsi
+++ b/arch/riscv/boot/dts/sophgo/cv1800b.dtsi
@@ -7,6 +7,11 @@

 / {
 	compatible = "sophgo,cv1800b";
+
+	memory at 80000000 {
+		device_type = "memory";
+		reg = <0x80000000 0x4000000>;
+	};
 };

 &plic {
--
2.44.0