Re: [RFC 0/5] Renesas RZ series pinctrl driver

[Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>]

Hi Geert,

On Monday 30 Jan 2017 17:08:11 Geert Uytterhoeven wrote:
> On Mon, Jan 30, 2017 at 2:51 PM, Linus Walleij wrote:
> > On Wed, Jan 25, 2017 at 7:09 PM, Jacopo Mondi wrote:
> >> after having discussed in great detail the RZ series per-pin PFC
> >> hardware peculiarities, this is a proposal for a possible pin-based pin
> >> controller driver for SoC devices of Renesas RZ family.
> >> 
> >> This RFC series adds a minimal driver infrastructure which supports pin
> >> multiplexing via explicit per-pin settings performed in device tree
> >> sources.
> >
> > I think this is what Laurent had in mind when he said something about
> > that he should have taken the per-pin approach from day 1.
> > 
> > I would especially like to see Laurent's review and ACK on this series
> > for that reason so we don't create something less than what he is
> > expecting for the future of Renesas pin control.
> 
> It depends on the actual hardware: while per-pin settings are suitable for
> SoCs that have per-pin hardware configuration (e.g. RZ/A1), it's not
> suitable for SoCs where that's not the case, and where the hardware has
> group-wise configuration (e.g. on R-Car).
> 
> Hence IMHO "the future of Renesas pin control" will remain a split
> personality for a while ;-)
> 
> Laurent: please kick me if you disagree...

I unfortunately agree. Maybe we could try to speed up the process by providing 
feedback to the hardware engineers ?

-- 
Regards,

Laurent Pinchart

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