linux-kernel - Re: [RESEND PATCH v2 3/3] ARM: dts: imx28-cfa10036: Fix the reset gpio signal polarity

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Date:   Tue, 9 Oct 2018 09:36:51 -0300
From:   Fabio Estevam <festevam@...il.com>
To:     Michal Vokáč <Michal.Vokac@...ft.com>
Cc:     Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Shawn Guo <shawnguo@...nel.org>,
        Fabio Estevam <fabio.estevam@....com>,
        Rob Herring <robh+dt@...nel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-fbdev@...r.kernel.org
Subject: Re: [RESEND PATCH v2 3/3] ARM: dts: imx28-cfa10036: Fix the reset
 gpio signal polarity

Hi Michal,

On Tue, Oct 9, 2018 at 5:30 AM Vokáč Michal <Michal.Vokac@...ft.com> wrote:

> Sorry for the inconvenience :( Lesson learned..
>
> So in other words (no offense): broken drivers need to stay broken because
> users may already get used to the broken behavior?

In order to keep the old dtb's working you could introduce a new
property (like reset-gpio-active-low, for example).

Then the driver behavior can be made untouched for the old dtb's and
only new dtb's with this new property would have the correct GPIO
reset behavior.