On Fri, Mar 23, 2018 at 03:56:24PM +0000, Ioana Ciornei wrote: > > > > > On Fri, Mar 23, 2018 at 10:38:56AM -0500, Ioana Ciornei wrote: > > > +#include "fsl-mc-private.h" > > > + > > > +#define FSL_MC_BUS_MAX_MINORS 1 > > > > As you only need/want one character device here, why not just use the misc > > device api? It's much simpler, and handles all of the housekeeping for you > > correctly. It also means I don't have to audit all of your chardev code to > > verify it > > is correct :) > > I have considered the misc device api but the fsl-mc bus, since it is > a platform driver, is probing before the misc char driver.
How? The misc code is just "core code" there's nothing to "probe" here. Is this an init-call ordering issue somehow? A platform driver probe should be after the misc core is initialized. And if not, you can always defer your probe. thanks, greg k-h