On Fri, May 15, 2020 at 03:01:11PM +0300, Andy Shevchenko wrote:

> General question, doesn't spi core provides us some helpers like
> spi_delay_exec()?

Well, nobody wrote one.  It's also a bit tricky to handle given that
often you're checking some controller specific things while a FIFO in
the IP drains/fills, though nothing insurmountable.