I am using imx6ul
The kernel version is linux4.1.15
I configured the device tree and kernel and tested it with Documentation/spi/spidev_test.c
However, I set up an 8-bit transfer. After the clock has finished transmitting the 8-bit byte, there will be a time interval and then the clock will be sent. As shown below, I should modify it there to modify the size of the interval.