[U-Boot] RFC Pin Configuration Device Tree Bindings for Altera Arria10 SOCFPGA

[mgerlach]

On Wed, 3 Dec 2014, Pavel Machek wrote:

> Hi!
> 
> > >>>         altr,pinmux-regs = <0xF 0xF 0xF 0xF 0xF 0xF 0xF 0xF 0xF 0xF
> > >>>         reg = <0xffd07300 0x00000048>;
> > >>>         altr,pinmux-regs = <0x00000 0x51010 0x51010 0x51010 0x40605
> > >>>                    0x40605 0x00605 0x40605 0x40605 0x40605
> > >>>                    0x10605 0x51010 0x51010 0x51010 0x51010
> > >>>                    0x51010 0x03030 0x23030>;
> > >>>     };
> > >>>     fpga {
> > >>>         reg = <0xffd07400 0x00000044>;
> > >>>         altr,pinmux-regs = <0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0
> > >>>                    0x0 0x0 0x0 0x0 0x0 0x0 0x0>;
> > >>>     };
> > >>> };
> > >
> > >>Does this match the kernel? Or does the kernel have no such binding yet?
> > >
> > > There are no such bindings in the kernel yet.  Dynamic pinmuxing is not supported by the Arria 10; so we don't anticipate the kernel needing pinmux information.
> >
> > OK. Currently device tree files are stored in the kernel, so it might
> > be worth submitting it there one day regardless.
> 
> Actually, I believe you should use standard pinmux format. Just
> because dynamic pinmuxing is not supported now does not mean it will
> not be supported in Arria 11... And it was already supported in older
> chipsets (right?).
> 

> 									Pavel

Hi Pavel,

Thanks for the suggestion.  I had another look at the pinctlr bindings
in the kernel.  I think we should be using standard bindings defined in 
Documentation/devicetree/bindings/pinctrl/pinctrl-single.txt for
the Arria 10 SOCFPGA.

Matthew Gerlach

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>