On 12/10/2022 01:56, Icenowy Zheng wrote:

PopStick is a minimal Allwinner F1C200s dongle, with its USB controller
wired to a USB Type-A port, a SD slot and a SPI NAND flash on board, and
an on-board CH340 USB-UART converted connected to F1C200s's UART0.

(...)

+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led {
+			function = LED_FUNCTION_STATUS;
+			color = <LED_COLOR_ID_GREEN>;
+			gpios = <&pio 4 6 GPIO_ACTIVE_HIGH>; /* PE6 */
+			linux,default-trigger = "heartbeat";
+		};
+	};
+
+	reg_vcc3v3: vcc3v3 {

Generic node names, so at least generic "regulator" prefix or suffix.

+		compatible = "regulator-fixed";
+		regulator-name = "vcc3v3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+	};
+};
+
+&mmc0 {
+	cd-gpios = <&pio 4 3 GPIO_ACTIVE_LOW>; /* PE3 */
+	bus-width = <4>;
+	disable-wp;
+	status = "okay";

Keep status as last property.

+	vmmc-supply = <&reg_vcc3v3>;
+};
+
+&spi0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&spi0_pc_pins>;
+	status = "okay";
+
+	flash@0 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "spi-nand";
+		reg = <0>;

compatible and reg are by convention the first properties.

+		spi-max-frequency = <40000000>;
+

Best regards,
Krzysztof


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