IMX8MQ USB Wakeup

[Jack19]

Hello all,

I am attempting to use USB to wake from a low power mode on an MIMX8MQ6CVAHZAA with i.MX Linux Kernel 5.4. To test, I am using the following procedure with a USB keyboard:

# check that the keyboard device wakeup is enabled
$ cat /sys/bus/usb/devices/1-1/power/wakeup
enabled

# suspend system
$ echo deep > /sys/power/state

I expect the system to resume on a key press, but nothing happens.

I am aware of erratum e11231 from this document applicable to the processor. A related NXP community post (user @RayW8d had a very similar goal) indicates that there is a patch for e11231. However, it does not appear that this patch was made public.

Please advise on how to achieve this wakeup functionality via USB.

Thank you in advance.

[Rita_Wang]

Dear Jack,

@Jack19 I already email the patches to you, please have a check.

Wish you have a nice day

Best Regards

Rita

[Roman_Loz]

Hi,
I tried this on imx8mp and had the same result (nothing).
Could you please help me too?

[Rita_Wang]

@Roman_Loz I email to you, please have a check.

[Roman_Loz]

Thank you for your help.
I am trying to wakeup imx8mp (not imx8mq) and the Kernel based on tag lf-6.1.22-2.0.0.
Are there any patches for that?

[Rita_Wang]

Hi @Roman_Loz ,

We do not have this patch for the i.MX8MP, but you can try to refer to the patch for the i.MX8MQ.

Wish you have a nice day

Best Regards

Rita