On Thu, 15 Nov 2018 16:01:37 +0100 Wolfram Sang <wsa@xxxxxxxxxxxxx> wrote: > Hi Boris, > > > What we could do though, is expose I3C devices that do not have a > > driver in kernel space, like spidev does. > > ... > > > Mark, Wolfram, Arnd, Greg, any opinion? > > Is there a benefit for having drivers in userspace? My gut feeling is to > encourage people to write kernel drivers. If this is, for some reason, > not possible for some driver, then we have a use case at hand to test > the then-to-be-developed userspace interface against. Until then, I > personally wouldn't waste effort on designing it without a user in > sight. I kind of agree with that. Vitor, do you have a use case in mind for such userspace drivers? I don't think it's worth designing an API for something we don't need (yet).