[PATCH 1/3] dts: qcs6490-rubikpi3: Add U-Boot dtsi

[Hongyang Zhao]

Add the board-specific U-Boot device tree overrides for the
Thundercomm RUBIK Pi 3.

When U-Boot is loaded as the primary bootloader, no previous stage
provides the memory layout. Describe the 8 GiB LPDDR4x layout locally
so U-Boot can use the available DRAM.

Signed-off-by: Hongyang Zhao <hongyang.zhao at thundersoft.com>
---
 .../arm/dts/qcs6490-thundercomm-rubikpi3-u-boot.dtsi | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/arch/arm/dts/qcs6490-thundercomm-rubikpi3-u-boot.dtsi b/arch/arm/dts/qcs6490-thundercomm-rubikpi3-u-boot.dtsi
new file mode 100644
index 00000000000..8518cd402d0
--- /dev/null
+++ b/arch/arm/dts/qcs6490-thundercomm-rubikpi3-u-boot.dtsi
@@ -0,0 +1,20 @@
+// SPDX-License-Identifier: BSD-3-Clause
+/ {
+	/*
+	 * When running as the primary bootloader there is no prior stage to
+	 * populate the memory layout for us. We should have multiple nodes
+	 * here, but ABL does not like that.
+	 */
+	memory at 80000000 {
+		device_type = "memory";
+		reg = <0 0x80000000 0 0x39700000>,
+		      <0 0xc0000000 0 0x01800000>,
+		      <0 0xc3400000 0 0xbcc00000>,
+		      <1 0x80000000 1 0x00000000>;
+	};
+};
+
+// RAM Entry 0 : Base 0x0080000000  Size 0x0039700000
+// RAM Entry 1 : Base 0x00C0000000  Size 0x0001800000
+// RAM Entry 2 : Base 0x00C3400000  Size 0x00BCC00000
+// RAM Entry 3 : Base 0x0180000000  Size 0x0100000000

-- 
2.43.0