[PATCH RFC 1/2] ARM: imx6qdl: provide pinctrl configurations for DAT3 pull-down

[Shawn Guo]

On Mon, Oct 07, 2013 at 08:52:40PM -0600, Stephen Warren wrote:
> >>> &usdhc1 {
> >>> 	pinctrl-names = "default";
> >>> 	pinctrl-0 = <&pinctrl_usdhc1_1 &pinctrl_usdhc1_1_dat3cd>;
> >>> 	...
> >>> 	status = "okay";
> >>> };
> >>
> >> Are you sure that this will always be the case?  This would assume that
> >> the pinctrl entries are always processed sequentially.
> > 
> > That will always be the case per my understanding.  Otherwise, I would
> > be so surprised.  Are you seeing any case that the entries are not
> > processed sequentially?
> 
> Given the way the Linux code currently works, I think that will
> currently happen in practice. However, there's nothing in the pinctrl DT
> binding documentation that guarantees (or even mentions) such semantics.

Ah, that's Russell's point, I guess.  I think it makes perfect sense to
make this clear in the binding doc, as this "overwrite mechanism" can be
very helpful.  I will send a patch for it.

Shawn