linux-kernel - Re: [PATCH 0/3] pinctrl: sunxi: Remove non-existent reset line references

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Date:   Wed, 15 Jun 2022 15:26:36 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Samuel Holland <samuel@...lland.org>
Cc:     Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Andre Przywara <andre.przywara@....com>,
        Maxime Ripard <mripard@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-gpio@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-sunxi@...ts.linux.dev
Subject: Re: [PATCH 0/3] pinctrl: sunxi: Remove non-existent reset line references

On Tue, May 31, 2022 at 7:36 AM Samuel Holland <samuel@...lland.org> wrote:

> I assume these properties came from a lack of documentation, and the
> very reasonable assumption that where there's a clock gate bit in the
> CCU, there's a reset bit. But the pin controllers are special and don't
> have a module reset line. The only way to reset the pin controller is to
> reset the whole VDD_SYS power domain.
>
> This series is preparation for converting the PRCM MFD and legacy clock
> drivers to a CCU clock/reset driver like all of the other Allwinner
> SoCs. I don't plan to add reset lines that don't actually exist to the
> new CCU driver. So we might as well get rid of the references now.
> Technically this breaks devicetree compatibility, since the old drivers
> expect the reset. But the CCU conversion will be a compatibility break
> anyway, so it's a bit of a moot point.
>
>
> Samuel Holland (3):
>   pinctrl: sunxi: Remove reset controller consumers
>   ARM: dts: sunxi: Drop resets from r_pio nodes
>   dt-bindings: pinctrl: sunxi: Disallow the resets property

Patches applied for v5.20!

Yours,
Linus Walleij