[PATCH V2 0/9] ARM: tegra: add platform suspend support

Joseph Lo josephl at nvidia.com
Thu Mar 14 06:05:40 EDT 2013

On Thu, 2013-03-14 at 12:43 +0800, Stephen Warren wrote:
> On 03/13/2013 07:26 PM, Joseph Lo wrote:
> > On Thu, 2013-03-14 at 01:34 +0800, Stephen Warren wrote:
> >> On 03/13/2013 12:04 AM, Joseph Lo wrote:
> >> ...
> >>> BTW, I want to mention one thing about PMC DT bindings. Because I can't
> >>> add all of the PMC DT bindings in one time, the PMC is related to too
> >>> many devices to work for runtime PM and power domain control. And some
> >>> wake up sources control for deep sleep mode (LP0). They are still under
> >>> developing for upstream. May I add more bindings for PMC later?
> >>
> >> With DT you are supposed to define the complete DT binding for the HW up
> >> front. There have been some hints that incrementally defining bindings
> >> will start to get push-back. How hard is it in this case to simply
> >> define the entire binding right now?
> >>
> > There are still two main features for PMC that we need to define
> > bindings/properties in DT. One is power main the other wake up source.
> > But we are not there yet. Because I don't have drivers to verify them is
> > enough or not. If I add all the bindings right now, I believe it will be
> > modify later.
> Since the DT is supposed to be a representation of the HW, and not a
> representation of what a particular driver needs, I'm not sue why you'd
> need to be able to test a driver before you could design a DT binding.
Because some of the power domain has complicated relation, I am still
figuring out how to bind them can make drivers have enough power domain
information to do a power control function.


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