linux-kernel - Re: [linux-sunxi] [PATCH 1/2] drivers: pinctrl: add driver for Allwinner H5 SoC

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Date:   Mon, 9 Jan 2017 00:16:00 +0000
From:   André Przywara <andre.przywara@....com>
To:     Maxime Ripard <maxime.ripard@...e-electrons.com>,
        Linus Walleij <linus.walleij@...aro.org>
Cc:     ext Tony Lindgren <tony@...mide.com>,
        Icenowy Zheng <icenowy@...c.xyz>,
        Catalin Marinas <catalin.marinas@....com>,
        Chen-Yu Tsai <wens@...e.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        linux-sunxi <linux-sunxi@...glegroups.com>
Subject: Re: [linux-sunxi] [PATCH 1/2] drivers: pinctrl: add driver for
 Allwinner H5 SoC

On 05/01/17 22:42, Maxime Ripard wrote:
> On Fri, Dec 30, 2016 at 01:55:44PM +0100, Linus Walleij wrote:
>> On Mon, Dec 26, 2016 at 3:33 PM, André Przywara <andre.przywara@....com> 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[1].
>>>
>>> So:
>>> 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
>>> entirely?
>>
>> 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.
> 
> I'm not open to that, and I'm getting tired of discussing it over and
> over again. Andre, if you want to be convinced again, please read the
> last discussion we had on this topic.

As I said: It didn't convince me back then. And frankly we didn't really
discuss it back then, I just refrained from entering a discussion
against _two_ maintainers at this time, since my capacity on this kind
of email threads is really very limited - especially for something that
is a hobby to me.

It isn't the highest priority on my list, but I am still planning on
sketching something, so that we can discuss about actual code.
As it seems like your new patches bring some relief to the immediate
copy&paste pain (though the actual DT aspect still remains), I will shut
up - for now ;-)

Cheers,
Andre.