hi,
I am currently working on IMX6 Board. I had some issue related with WiFi. Whenever my board is boot-up
at that time i got following message continuously & I can't enable WiFi also :
mmc1: timeout waiting for hardware interrupt.
mmc1: timeout waiting for hardware interrupt.
mmc1: timeout waiting for hardware interrupt.
mmc1: timeout waiting for hardware interrupt.
pls refer to the document as below, hope helpful for you