On Sat, Mar 17, 2018 at 01:53:52AM +0800, Icenowy Zheng wrote:

+		sram-controller@1c00000 {
+			compatible = "allwinner,sun50i-a64-sram-controller";
+			reg = <0x01c00000 0x1000>;
+			#address-cells = <1>;
+			#size-cells = <1>;
+			ranges;
+
+			sram_c: sram@18000 {
+				compatible = "mmio-sram";
+				reg = <0x00018000 0x28000>;
+				#address-cells = <1>;
+				#size-cells = <1>;
+				ranges = <0 0x00018000 0x28000>;
+
+				de2_sram: sram-section@0 {
+					compatible = "allwinner,sun50i-a64-sram-c";
+					reg = <0x0000 0x28000>;
+				};
+			};
+		};
+
 		syscon: syscon@1c00000 {
 			compatible = "allwinner,sun50i-a64-system-controller",
 				"syscon";

Isn't that the same device than the sram controller node you just added?

Maxime

-- 
Maxime Ripard, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com