linux-kernel - Re: [PATCH/RFT] pinctrl: renesas: rzv2m: Handle non-unique subnode names

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Date:   Tue, 4 Jul 2023 11:06:11 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Geert Uytterhoeven <geert+renesas@...der.be>
Cc:     Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
        Chris Paterson <Chris.Paterson2@...esas.com>,
        Biju Das <biju.das@...renesas.com>,
        linux-renesas-soc@...r.kernel.org, linux-gpio@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH/RFT] pinctrl: renesas: rzv2m: Handle non-unique subnode names

On Mon, Jul 3, 2023 at 5:07 PM Geert Uytterhoeven
<geert+renesas@...der.be> wrote:

> The eMMC and SDHI pin control configuration nodes in DT have subnodes
> with the same names ("data" and "ctrl").  As the RZ/V2M pin control
> driver considers only the names of the subnodes, this leads to
> conflicts:
>
>     pinctrl-rzv2m b6250000.pinctrl: pin P8_2 already requested by 85000000.mmc; cannot claim for 85020000.mmc
>     pinctrl-rzv2m b6250000.pinctrl: pin-130 (85020000.mmc) status -22
>     renesas_sdhi_internal_dmac 85020000.mmc: Error applying setting, reverse things back
>
> Fix this by constructing unique names from the node names of both the
> pin control configuration node and its child node, where appropriate.
>
> Reported by: Fabrizio Castro <fabrizio.castro.jz@...esas.com>
> Fixes: 92a9b825257614af ("pinctrl: renesas: Add RZ/V2M pin and gpio controller driver")
> Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
> ---
> Untested on real hardware.
> The RZ/G2L pin control drivers needs a similar fix.

If I need to merge this for fixes it's be great if we could also
include a fix for RX/G2L.

Anyway, I expect a pull request for renesas fixes or some explicit
instruction on
what to do when it's tested and confirmed working.

Yours,
Linus Walleij