Re: [PATCH v2 02/10] pwm: Allow chips to support multiple PWMs.

[Sascha Hauer <s.hauer-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>]

On Wed, Feb 08, 2012 at 09:15:08AM +0100, Thierry Reding wrote:
> * Ryan Mallon wrote:
> > On 07/02/12 02:19, Thierry Reding wrote:
> > > The total maximum number of PWM devices is currently fixed to 64, but
> > > can easily be made configurable via Kconfig.
> > 
> > It would be better to make the code handle arbitrary numbers of PWMs. A
> > Kconfig knob becomes annoying when you have more than one platform
> > configured into the kernel.
> 
> AFAICT handling an arbitrary number of PWMs will only be possible once we get
> rid of the global namespace and therefore should be postponed for later. I
> may be wrong, though, so if anybody can point me in the right direction I'm
> perfectly happy to change that in this series.
> 
> > > The patch is incomplete in that it doesn't convert any existing drivers
> > > that are now broken.
> > 
> > Does this patch actually break the drivers in terms of not building or
> > running? If so, can this patch series be reworked a bit to allow the old
> > PWM framework to be used until all of the drivers are converted?
> 
> That sentence is misleading. Since the new framework implements the exact
> same API as the drivers, any unconverted drivers will still work unless they
> are built within the same kernel as the framework.

I have a series porting all in kernel drivers to this framework. I can
follow up on this series once it's clear we want to go this way. With
this series the way will be free to move to a better pwm matching
without a global pwm index because the drivers won't be affected by
this change anymore.

Sascha


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