Hi, William Breathitt Gray <vilhelm.gray@xxxxxxxxx> writes: > On Sun, Sep 15, 2019 at 02:53:47PM +0100, Jonathan Cameron wrote: >> On Mon, 9 Sep 2019 15:16:04 +0300 >> Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx> wrote: >> >> > Hi, >> > >> > Here's a simple RFC for Intel's Quadrature Encoder. Let me make it clear >> > that I don't mean we should the following patch as is, rather I'd like >> > to open the discussion to, perhaps, extending Industrial Automation >> > Framework with support for Quadrature Encoders. >> > >> > Let me know if you think IIO would be correct place for such devices, >> > then I can start reworking the driver to provide an IIO-compliant >> > interface. >> > >> > I'm thinking we would need standard sysfs files for configuring the QEP >> > into single-shot QEP mode or buffered Capture mode, configure thresholds >> > and other details. >> >> Hi Felipe, >> >> Fairly recently, similar concerns that IIO didn't really suite these >> devices lead William to create a specific 'counters' subsystem. >> +CC William. >> >> It may not address all of your requirements yet, but I would imagine it >> is a better fit than IIO would ever be. We have moved all the older >> counter drivers out of IIO and across to this new subsystem. >> >> Thanks, >> >> Jonathan > > Felipe, > > Take a look at the Generic Counter interface, it may be what you need: > https://www.kernel.org/doc/html/latest/driver-api/generic-counter.html Thanks guys, I wasn't aware of this new subsystem. I'll have a look at start porting the driver over. > There are some existing quadrature encoder counter devices using this > interface already; look at the files under drivers/counter for > reference. > > This interface is still relatively new, so if you have any problems just > shoot me an email and I'll be happy to help. :-) Will do William. cheers -- balbi
Attachment:
signature.asc
Description: PGP signature
