On Fri, May 06, 2022 at 01:42:37PM +0100, Mark Brown wrote: > On Fri, May 06, 2022 at 01:58:18PM +0300, Jani Nikula wrote: > > > Hey Mark, sorry for hijacking the thread a bit. regmap.h seems to have > > comprehensive API documentation, but there's very little in terms of > > higher level documentation that I could find. Is there any? > > Not outside of the source. I did a presentation at ELC-E ages > ago which you can probably find but I'm not sure how much it > would add. I watched that one! Anyway no recording, but I think I've found the pdf. Was in 2012 apparently. https://elinux.org/images/a/a3/Regmap-_The_Power_of_Subsystems_and_Abstractions.pdf Cheers, Daniel > > > I've been toying with the idea of adding a regmap based interface for > > accessing Display Port DPCD registers, with caching, and regmap seems > > like it's got the kitchen sink but I find it a bit difficult to > > navigate... > > The bus code is generally very thin so you shouldn't need to > worry about what the core is up to much if you just want to > support some bus. If this is a bus that has registers at > hardware level then looking at something like regmap-sdw.c should > be helpful, for something that's just a bit stream at the bus > level then something like regmap-i3c.c is a simple example. -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch
