在 2018年1月22日星期一 CST 下午8:14:35,Maxime Ripard 写道: > On Sat, Jan 20, 2018 at 07:17:26AM +0800, Icenowy Zheng wrote: > > This is the RFC initial patchset for the "new" Allwinner SUNIV ARM9 SoC. > > > > The same die is packaged differently, come with different co-packaged > > DRAM or shipped with different SDK; and then made many model names: F23, > > F25, F1C100A, F1C100S, F1C200S, F1C500, F1C600, R6, etc. These SoCs all > > share a common feature set and are packaged similarly (eLQFP128 for SoCs > > without co-packaged DRAM, QFN88 for with DRAM). As their's no > > functionality hidden on the QFN88 models (except DRAM interface not > > exported), it's not clever to differentiate them. So I will use suniv as > > common name of all these SoCs. > > Where is that suniv prefix coming from? The BSP (Melis and Linux). (e.g. "libs/suniv" directory of the Melis SDK and "arch/arm/boot/dts/sunivw1p1.dtsi" in the Linux SDK) > > And you need to have a SoC in all your compatibles. This isn't about > being clever or not, this is just a matter of being able to accurately > read in a crystal ball. Or maybe it's just the same, in which case, > I'd really like to have a course :) Okay. I will choose to use f1c100s in my next patchset, as it's where it's developed. (Although I mainly refered F1C600 BSP and document) > > You should really answer two questions here: > - Are you able to predict whether you'll find an SoC part of that > family in the future that derives a bit and will need a compatible > of its own? > - Are you able to predict which quirks we'll need along the way to > support all the SoCs you've listed there? > > If you can't answer yes to both these questions, with a 100% > certainty, then you'll need a SoC name in the compatible. > > Which doesn't prevent you from sharing as much as possible the DT like > we did between the A10s and the A13 for example. So the suniv-f1c100s.dtsi will still be kept empty and all peripherals known should go through suniv.dtsi. > > Maxime -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html