arm64: dts: rockchip: add SPI NOR flash overlay for NanoPi M6

arch/arm64/boot/dts/rockchip/overlay/Makefile

@@ -88,6 +88,7 @@ dtbo-$(CONFIG_ARCH_ROCKCHIP) += \
 	khadas-edge2-cam3.dtbo \
 	nanopi-m6-display-dsi0-yx35.dtbo \
 	nanopi-m6-display-dsi1-yx35.dtbo \
+	nanopi-m6-spi-nor-flash.dtbo \
 	rockchip-rk3588-opp-oc-24ghz.dtbo \
 	rockchip-rk3588-panthor-gpu.dtbo \
 	rk3566-roc-pc-sata2.dtbo \

arch/arm64/boot/dts/rockchip/overlay/nanopi-m6-spi-nor-flash.dts

@@ -0,0 +1,47 @@
+/dts-v1/;
+/plugin/;
+
+/ {
+	fragment@0 {
+		target = <&sdhci>;
+
+		__overlay__ {
+			status = "disabled";
+		};
+	};
+
+	fragment@1 {
+		target = <&sfc>;
+
+		__overlay__ {
+			max-freq = <50000000>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			pinctrl-names = "default";
+			pinctrl-0 = <&fspim0_pins>;
+			status = "okay";
+
+			spi_flash: spi-flash@0 {
+				#address-cells = <1>;
+				#size-cells = <0>;
+				compatible = "jedec,spi-nor";
+				reg = <0x0>;
+				spi-max-frequency = <50000000>;
+				spi-tx-bus-width = <1>;
+				spi-rx-bus-width = <4>;
+				status = "okay";
+
+				partitions {
+					compatible = "fixed-partitions";
+					#address-cells = <1>;
+					#size-cells = <1>;
+
+					loader@0 {
+						label = "loader";
+						reg = <0x0 0x1000000>;
+					};
+				};
+			};
+		};
+	};
+};