USB

[Ajayvk]

I have the USB hub which is controlled by the PIN71 USB2_EN_OC# i need to implement the USB2_EN_OC# to be low all the time so for that we are not able to figure out the pad mux by which we can make it low we are using IMX8MPLUS board so please give us a solution for it

[Ajayvk]

this is the pin which i need to make low all the time so how can i make it low all the time in imx8mp dts im not able to see how this is mapped so that i can make it low so power will be disabled

[JosephAtNXP]

Hi,

You didn't mentioned that you used SECO SOM, but found this user manual.

I can infer that that signal is related to Cypress USB3304-68LTXC USB 3.0 hub controller or its control circuit and the carrier board should implement a pulled-up resistor to 3.3V_RUN signal or GROUND as per your request; I don't think it's mapped to processor, I'm sending you a private mail to discuss further.

Regards,

[JosephAtNXP]

Hi,

Thank you for your interest in NXP Semiconductor products,

Could you clarify if my understanding is alright? You would like to use a pin pulled low from i.MX 8M Plus EVK.

Then, you should reserve the pin in device tree, this guide can accomplish the whole process. And to choose a pin, you could use UART3 TXD or RXD but disable it on device tree.

Regards