implementing usb for imx8 nano processor

[Jayesh2408]

trying to implement usb for imx8 nano, the eval board layout shows floating wire for Id pin. will it work for host mode? because id need to be =0 for host mode.

[Manuel_Salas]

Hello @Jayesh2408 

Hope you are doing very well.

Yes, a floating ID pin will work perfectly fine for host-only mode, provided you force the controller behavior via software.

You can just change the dr_mode property in device tree from "otg" to "host":

&usbotg1 {
	dr_mode = "host";
	hnp-disable;
	srp-disable;
	adp-disable;
	usb-role-switch;
	disable-over-current;
	samsung,picophy-pre-emp-curr-control = <3>;
	samsung,picophy-dc-vol-level-adjust = <7>;
	status = "okay";

	port {
		usb1_drd_sw: endpoint {
			remote-endpoint = <&typec1_dr_sw>;
		};
	};
};

Best regards,

Salas.