Hi Li Jun, On Tue, Dec 13, 2022 at 5:15 AM Jun Li <jun.li@xxxxxxx> wrote: > So this disconnect and then connect is you expected behavior? Yes, correct. I found a way to get this behavior in both 5.10 as well as 6.1 kernels: If I remove the USB_OTG2_OC pinctrl entry and pass 'disable-over-current', it works as expected. On this board, the MX7D_PAD_UART3_RTS_B__USB_OTG2_OC pad goes to 3.3V via a 10Kohm pullup resistor. Could you please explain why removing theUSB_OTG2_OC entry makes things to work? Thanks