On 05/23/2014 05:53 PM, Tony Lindgren wrote: > * Roger Quadros <rogerq@xxxxxx> [140523 01:17]: >> On 05/22/2014 05:46 PM, Ezequiel Garcia wrote: >>> On 22 May 01:51 PM, Javier Martinez Canillas wrote: >>>> On Thu, May 22, 2014 at 10:12 AM, Roger Quadros <rogerq@xxxxxx> wrote: >>>>>> On 21 May 02:20 PM, Roger Quadros wrote: >>>>>> While I agree that the GPMC driver is a bit messy, I'm not sure it's possible >>>>>> to go through such a complete devicetree binding re-design (breaking backwards >>>>>> compatibility) now that the binding is already in production. >>>>> >>>>> Why not? especially if the existing bindings are poorly dones. Is anyone using these >>>>> bindings burning the DT into ROM and can't change it when they update the kernel? >>>>> >>>> >>>> While I do agree that your DT bindings are much better than the >>>> current ones, there is a policy that DT bindings are an external API >>>> and once are released with a kernel are set in stone and can't be >>>> changed. >>>> >>> >>> Exactly. The DT binding is considered an ABI. Thus, invariant across kernel >>> versions. Users can't be coherced into a DTB update after a kernel update. >>> >>> That said, I don't really care if you break compatilibity in this case. >>> Rather, I'm suggesting that you make sure this change is going to be accepted >>> upstream, before doing any more work. The DT maintainers are reluctant to do >>> so. >> >> Appreciate your concern. >> >> Would be really nice if you can review patches 1-12. They have nothing to do with DT changes. >> Thanks. > > I'm mostly concerned about keeping things working. I think the > only way we can keep things working is to keep support for > the old binding around in addition to the new one. That way > we can update devices one at a time. Good to hear that you are not keen on keeping the old bindings forever. I understand that we need to keep things working during the transition. I'll think of something to maintain backward compatibility while supporting the new binding. cheers, -roger -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
