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.
Dear Jack,
@Jack19 I already email the patches to you, please have a check.
Wish you have a nice day
Best Regards
Rita
Hi,
I tried this on imx8mp and had the same result (nothing).
Could you please help me too?
@Roman_Loz I email to you, please have a check.
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?
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