[PATCH 06/10] arm/tegra: prepare pinmux code for multiple tegra variants

[Stephen Warren]

Peter De Schrijver wrote at Monday, November 21, 2011 7:29 AM:
> On Fri, Nov 18, 2011 at 10:41:16PM +0100, Olof Johansson wrote:
> > On Thu, Nov 17, 2011 at 06:19:20PM +0200, Peter De Schrijver wrote:
> > > This patch modifies the pinmux code to be useable for multiple tegra variants.
> > > Some tegra20 specific constants will be replaced by variables which will be
> > > initialized to the appropriate value at runtime.
...
> > > diff --git a/arch/arm/mach-tegra/board-harmony-pcie.c b/arch/arm/mach-tegra/board-harmony-pcie.c
...
> > > +#include <mach/pinmux-tegra20.h>
> >
> > Boards shouldn't have to include this. The idea is that you should only
> > have to do board code against the pinmux.h interface, which internally
> > abstracts it for tegra 20 vs tegra 30.
> 
> The pinmux naming is still SoC specific. Unless we move this to devicetree
> (which should be part of a different patchset), I don't see how we can solve
> this, except by renaming all the pingroups. That would cause a lot more
> changes though.

I believe that Peter's explanation makes sense.

BTW, re: the new pinmux API: I have a driver for both Tegra20 and Tegra30
now which should work for muxing. All the data is present for all the pin
configs too (tri-state, pull, ...) but we need to define the core pinctrl
API for this before I can expose that. Similarly, we need DT bindings for
all of this before we can make use of it; something I hope to start work
on in the near future.

-- 
nvpublic