my development board is IMX7DSABRE. Linux kernel version is 4.9.88
When I use the eim bus for data transmission, I use asynchronous communication for data transmission.
During the transmission, when my OE signal is valid, the external device puts the data on the bus. But when the CPU reads the data on the bus, the manual does not seem to describe clearly. I want to set 20ns after the OE signal is valid, the CPU will read the data on the bus, because my external device puts the data on the bus, it takes 10ns.
The waiting time as shown in the picture below：