Re: [PATCH v4 2/4] dt-bindings: regulator: add bindings for output-supply

[Zev Weiss]

On Thu, Jul 14, 2022 at 09:59:48AM PDT, Rob Herring wrote:
> +Zev
>
> On Thu, Jul 14, 2022 at 9:54 AM Mark Brown <broonie@xxxxxxxxxx> wrote:
> > On Thu, Jul 14, 2022 at 09:07:49AM -0600, Rob Herring wrote:
> > > On Thu, Jul 14, 2022 at 8:43 AM Mark Brown <broonie@xxxxxxxxxx> wrote:
> >
> > > > Consider for example a BMC (IIRC that's what their specific product is),
> > > > a bench supply or some automated test equipment.  Part of the function
> > > > for these systems is to provide power to other systems which would be
> > > > represented as a root or wall supply in the description of the system
> > > > that actually uses the supply if it were described using DT.
> >
> > > Didn't someone else have a similar use recently? Controlling some
> > > supply external to the system. I can't seem to find it now.
> >
> > IIRC that was an earlier iteration of the same thing - it's been round
> > the houses a bit.  extcon seemed like it might be a home since these are
> > external connections from the system but in the end people didn't think
> > it looked like a good fit.
>
> Found it:
>
> v1: https://lore.kernel.org/all/20220504065252.6955-2-zev@xxxxxxxxxxxxxxxxx/
> v2: https://lore.kernel.org/all/20220505232557.10936-1-zev@xxxxxxxxxxxxxxxxx/
>
> v2 was the using extcon version. v1 looks pretty similar to this one
> though anything that's just a compatible plus supplies would.
>
> But AFAICT these 2 submissions are completely independent.

Thanks for looping me in here Rob, I hadn't been aware of this series.

Naresh, I'd appreciate it if you could CC me on any subsequent 
iterations; as linked above I've made some sporadic attempts at getting 
support for this functionality merged, and am certainly interested in 
any other efforts on that front.

A question for Mark though -- in one of my earliest stabs at this I 
floated the idea of using reg-userspace-consumer for it, but was told in 
no uncertain terms that that driver was for testing only and should 
under no circumstances ever be instantiated in a production system.  Has 
the thinking on its usage changed in the last year or so such that this 
approach was deemed okay?


Thanks,
Zev