linux-kernel - Re: [PATCH v7] regulator: fixed: Convert to use GPIO descriptor only

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Date:   Fri, 12 Oct 2018 11:43:38 +0100
From:   Russell King - ARM Linux <linux@...linux.org.uk>
To:     Jon Hunter <jonathanh@...dia.com>
Cc:     Marcel Ziswiler <marcel.ziswiler@...adex.com>,
        "linus.walleij@...aro.org" <linus.walleij@...aro.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "robert.jarzmik@...e.fr" <robert.jarzmik@...e.fr>,
        "aaro.koskinen@....fi" <aaro.koskinen@....fi>,
        "jacopo@...ndi.org" <jacopo@...ndi.org>,
        "m.szyprowski@...sung.com" <m.szyprowski@...sung.com>,
        "broonie@...nel.org" <broonie@...nel.org>,
        "shc_work@...l.ru" <shc_work@...l.ru>,
        "haojian.zhuang@...il.com" <haojian.zhuang@...il.com>,
        "lgirdwood@...il.com" <lgirdwood@...il.com>,
        "rppt@...ux.vnet.ibm.com" <rppt@...ux.vnet.ibm.com>,
        "zonque@...il.com" <zonque@...il.com>,
        "marc.zyngier@....com" <marc.zyngier@....com>,
        "philipp.zabel@...il.com" <philipp.zabel@...il.com>,
        "linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
        "jmkrzyszt@...il.com" <jmkrzyszt@...il.com>,
        "geert+renesas@...der.be" <geert+renesas@...der.be>
Subject: Re: [PATCH v7] regulator: fixed: Convert to use GPIO descriptor only

On Fri, Oct 12, 2018 at 11:39:15AM +0100, Jon Hunter wrote:
> We had the same situation for Tegra124 Jetson TK1 but I don't think that
> adding a pseudo intermediate regulator is cleaner. If the GPIO controls
> more than one regulator, I don't see why is it necessary to change the
> DT. There are several other people reporting the same problem with
> various different boards. So this does seem to be a common usage.

Given that DT describes the hardware, not the software implementation,
it must not change just because we move from GPIO numbers to GPIO
descriptors.

The existing DT description is reasonable, and introducing ficticious
regulators in DT to work around the implementation is not reasonable.

-- 
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