[PATCH 1/2] pinctrl: add pinctrl-mxs support

[Dong Aisheng]

On Tue, Apr 24, 2012 at 09:26:51PM +0800, Shawn Guo wrote:
> On Tue, Apr 24, 2012 at 03:07:35PM +0200, Linus Walleij wrote:
> > Hm, that's pretty interesting - but are imx and mxs even going to use the
> > same driver then? Maybe I'm not following - are they similar
> > in all other aspects than for this pin config stuff?
> > 
> The mach-mxs (i.MX23 and i.MX28) is a totally different sub-architecture
> from mach-imx.  Freescale acquired it from SigmaTel a few years back.
> These two sub-architectures have completely different pin controllers.
> So, no, they are not going to use the same pinctrl driver but two
> different ones, pinctrl-mxs and pinctrl-imx.
> 
> The only common aspect is both two controllers only supports pin basis
> configuration (no hardware pingroup).  I think many other
> sub-architectures including omap are same on this aspect.
> 
The key point is not the hw difference, it is if we can find common part
on a higher abstract layer, that's what a subsystem or a good
designed common driver do, right?

My key point is to do common things like dt binding in pinctrl-imx and
handle hw difference in each SoC pinctrl driver.

Regards
Dong Aisheng