This patch enables USB1 and USB2 ports on Nanopi Neo Air.
--- linux-4.15/arch/arm/boot/dts/sun8i-h3-nanopi-neo-air.dts 2018-01-28 22:20:33.000000000 +0100
+++ air-kernel/linux-4.15/arch/arm/boot/dts/sun8i-h3-nanopi-neo-air.dts 2018-03-05 12:39:50.768609174 +0100
@@ -84,6 +84,16 @@
status = "okay";
};
+/*Enable USB hostcontroller support */
+&ehci2 {
+ status = "okay";
+};
+
+&ehci3 {
+ status = "okay";
+};
+
+
&uart0 {
pinctrl-names = "default";
pinctrl-0 = <&uart0_pins_a>;
Best wishes,
Jayashree
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