Hi Michael, > Michael Zoran <mzoran@xxxxxxxxxxxx> hat am 17. März 2017 um 17:48 geschrieben: > > > On Fri, 2017-03-17 at 17:31 +0100, Stefan Wahren wrote: > > Hi Michael, > > > > > > Am 17.03.2017 um 16:22 schrieb Michael Zoran: > > > The firmware now has a mailbox API for performing generalized gpio > > > through > > > the firmware. This driver builds upon a driver written by Dave > > > Stevenson > > > that was written specifically for the expander on the RPI 3, but I > > > have > > > generalized for generic GPIO through the firmware. > > > > > > With this change I was able to test VC4 on a RPI 3 running in arm64 > > > with > > > a pure mainline tree from the staging branch. > > > > > > The firmware gpio numbers are currently documented at: > > > https://github.com/raspberrypi/firmware/blob/master/extra/dt-blob.d > > > ts > > > > > > > > > > could you please explain why this driver should go to staging? > > I can think of a few reasons: > > 1. The mailbox API is still very new and a work in progress. I'm sure > it's probably going to change some. > > 2. It fits in with the VideoCore subsystem idea in that it doesn't talk > directly to hardware. Submitting it to staging would allow us to get > VC4 working sooner to unblock proper testing on a RPI 3. > > 3. I have some ideas for this driver for future work that I'm still > thinking about but I'm not ready yet to submit any changes. > before running into the wrong direction i suggest to send at least 1 RFC series to the GPIO and the DT mailing list. If you interested i can send you my comments to this series. Stefan _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
