Change the stepper API to instead of changing the stepper speed based on
the velocity in microsteps per second to use the delay in usec between
successive steps. Also remove the velocity from the `stepper_run` function
as typical API usage is enable -> set step interval -> run.
Signed-off-by: Fabian Blatz <fabianblatz@gmail.com>
Convert qspi and hyperflash to variants instead of revisions by popular
demand.
And convert evkb into a revision instead of a different board.
Signed-off-by: Declan Snyder <declan.snyder@nxp.com>
Adds 2 test suites for the drv8424 stepper driver, testing API conformity
and return values in the first suite and gpio pin values in the second
suite
Signed-off-by: Jan Behrens <jan.behrens@navimatix.de>
