Re: [linux-sunxi] [PATCH 1/2] drivers: pinctrl: add driver for Allwinner H5 SoC
From: Linus Walleij
Date: Fri Dec 30 2016 - 07:59:07 EST
On Mon, Dec 26, 2016 at 3:33 PM, AndrÃ Przywara <andre.przywara@xxxxxxx> wrote:
> So while this patch technically looks correct, I was wondering if we
> should really explore the possibility of making the whole of sunxi
> pinctrl DT controlled.
> I brought this up a while ago, but people weren't overly enthusiastic
> about it, though their argument weren't really convincing to me.
> As this "driver" here is basically a table linking GPIO bit settings
> (the actual mux value) to names and every pin we care about needs to be
> enumerated in the DT anyway, why not just add something like:
> allwinner,pinmux = <4>;
> to each pin(group) in the DT and get rid of this "driver" file here
I'm open to that if you can use pinctrl-single which is in the kernel
for this purpose only, and is used with both OMAPs and HiSilicon.
It recently was improved and will be improved more in this cycle,
see for example:
pinctrl: Introduce generic #pinctrl-cells and pinctrl_parse_index_with_args
> (...) Also I guess the common sunxi
> pinctrl driver code needs some significant rework.
I would guess is just needs replacing with pinctrl-single in that case.