linux-kernel - Re: [PATCH 2/8] pinctrl: sunxi: Add support for the Allwinner H616 pin controller

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Date:   Mon, 14 Dec 2020 17:26:31 +0800
From:   Chen-Yu Tsai <wens@...e.org>
To:     Icenowy Zheng <icenowy@...c.io>
Cc:     Andre Przywara <andre.przywara@....com>,
        Maxime Ripard <mripard@...nel.org>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        Icenowy Zheng <icenowy@...c.xyz>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-sunxi <linux-sunxi@...glegroups.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Yangtao Li <frank@...winnertech.com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>
Subject: Re: [PATCH 2/8] pinctrl: sunxi: Add support for the Allwinner H616
 pin controller

On Mon, Dec 14, 2020 at 12:28 AM Icenowy Zheng <icenowy@...c.io> wrote:
>
> 在 2020-12-02星期三的 13:54 +0000，Andre Przywara写道：
> > Port A is used for an internal connection to some analogue circuitry
> > which looks like an AC200 IP (as in the H6), though this is not
> > mentioned in the manual.
>
> When developing for V831, I found that PIO controller in H616 (and
> V831) has the functionality of selecting IO voltage of PF bank (needed
> to handle UHS-I).
>
> How should we model this in PIO driver?

I suppose we could expose it as a regulator for the mmc node to consume
as its vqmmc-supply?

ChenYu