arm64: dts: renesas: Add R8A779G0 V4H DBSC5 and RT-VRAM DT nodes

Describe DBSC5 DRAM controller and RT-VRAM configuration interface
as two new DT nodes in R-Car Gen4 R8A779G0 U-Boot DT extras file.
This node is used by the U-Boot SPL for R8A779G0 SoC, where the
DBSC5 and RT-VRAM drivers bind to these nodes and bring up the
DRAM controller and RT-VRAM settings respectively, so U-Boot
proper can be loaded into DRAM and started on Cortex A76 core.

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>

diff --git a/arch/arm/dts/r8a779g0-u-boot.dtsi b/arch/arm/dts/r8a779g0-u-boot.dtsi
index f60eba5..42df321 100644 (file)
--- a/arch/arm/dts/r8a779g0-u-boot.dtsi
+++ b/arch/arm/dts/r8a779g0-u-boot.dtsi
@@ -15,3 +15,21 @@
 &extalr_clk {
        bootph-all;
 };
+
+&soc {
+       ram@e6780000 {  /* DBSC5 */
+               compatible = "renesas,r8a779g0-dbsc";
+               reg = <0 0xe6780000 0 0x80000>;
+               power-domains = <&sysc R8A779G0_PD_ALWAYS_ON>;
+               status = "okay";
+               bootph-all;
+       };
+
+       ram@ffec0000 {  /* RT-VRAM */
+               compatible = "renesas,r8a779g0-rtvram";
+               reg = <0 0xffec0000 0 0xf000>;
+               power-domains = <&sysc R8A779G0_PD_ALWAYS_ON>;
+               status = "okay";
+               bootph-all;
+       };
+};