[PATCH] arm: zynq: add system level control register manager

[John Linn]

> -----Original Message-----
> From: Josh Cartwright [mailto:josh.cartwright at ni.com]
> Sent: Tuesday, November 13, 2012 10:34 AM
> To: Michal Simek
> Cc: Josh Cartwright; Daniel Borkmann; Arnd Bergmann; linux-arm-kernel at lists.infradead.org; John Linn
> Subject: Re: [PATCH] arm: zynq: add system level control register manager
> 
> On Mon, Nov 12, 2012 at 11:35:46AM +0000, Michal Simek wrote:
> > >    3. Figure out MIO pinctrl support and bindings (?)
> >
> > We will look at this topic more closely.
> 
> For some clarification: are you (or someone at Xilinx) actively looking
> at this?

Hi Josh,

No one is looking at it that I know of (other than maybe Michal). Our previous thinking was that this was low priority as the first stage boot loader sets up the MIO prior to the kernel running. U-boot needs the MIO setup for some set of devices also.

I don't know the use cases for dynamic MIO, or I'm just misunderstanding what the pinctrl really does. Do designers often build a board to deal with being able use the pins for multiple purposes?

Thanks
John

> 
> Thanks,
>   Josh