Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
MIME-Version: 1.0
References: <20220608095623.22327-1-tmaimon77@gmail.com> <20220608095623.22327-12-tmaimon77@gmail.com>
 <91549b70-08fc-ed6f-c48e-5bcb70ea63d0@linaro.org> <CAP6Zq1j2VZno4w4w0QCYwHnRaVqiM=DnNSmND1vOGDs_wfi2zw@mail.gmail.com>
 <8e02ad54-5dad-aee7-6fa8-70c72f93bf5e@linaro.org>
In-Reply-To: <8e02ad54-5dad-aee7-6fa8-70c72f93bf5e@linaro.org>
From:   Tomer Maimon <tmaimon77@gmail.com>
Date:   Mon, 13 Jun 2022 10:16:33 +0300
Message-ID: <CAP6Zq1j2FgMmX9NJRoDMCsRLnF0RTETSTuMv8rEhr3FGLvY7yw@mail.gmail.com>
Subject: Re: [PATCH v2 11/20] reset: npcm: using syscon instead of device data
To:     Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Cc:     Avi Fishman <avifishman70@gmail.com>,
        Tali Perry <tali.perry1@gmail.com>,
        Joel Stanley <joel@jms.id.au>,
        Patrick Venture <venture@google.com>,
        Nancy Yuen <yuenn@google.com>,
        Benjamin Fair <benjaminfair@google.com>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Michael Turquette <mturquette@baylibre.com>,
        Stephen Boyd <sboyd@kernel.org>,
        Philipp Zabel <p.zabel@pengutronix.de>,
        Greg KH <gregkh@linuxfoundation.org>,
        Daniel Lezcano <daniel.lezcano@linaro.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Wim Van Sebroeck <wim@linux-watchdog.org>,
        Guenter Roeck <linux@roeck-us.net>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will@kernel.org>, Arnd Bergmann <arnd@arndb.de>,
        Olof Johansson <olof@lixom.net>,
        Jiri Slaby <jirislaby@kernel.org>,
        Shawn Guo <shawnguo@kernel.org>,
        Bjorn Andersson <bjorn.andersson@linaro.org>,
        Geert Uytterhoeven <geert+renesas@glider.be>,
        Marcel Ziswiler <marcel.ziswiler@toradex.com>,
        Vinod Koul <vkoul@kernel.org>,
        Biju Das <biju.das.jz@bp.renesas.com>,
        Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>,
        Robert Hancock <robert.hancock@calian.com>,
        =?UTF-8?Q?Jonathan_Neusch=C3=A4fer?= <j.neuschaefer@gmx.net>,
        Lubomir Rintel <lkundrak@v3.sk>,
        devicetree <devicetree@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        linux-clk <linux-clk@vger.kernel.org>,
        "open list:SERIAL DRIVERS" <linux-serial@vger.kernel.org>,
        LINUXWATCHDOG <linux-watchdog@vger.kernel.org>,
        Linux ARM <linux-arm-kernel@lists.infradead.org>
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

Hi Krzysztof,

I will make sure to add backward compatibility in the reset driver in
the next version.

Thanks,

Tomer


On Fri, 10 Jun 2022 at 12:53, Krzysztof Kozlowski
<krzysztof.kozlowski@linaro.org> wrote:
>
> On 09/06/2022 23:37, Tomer Maimon wrote:
> > Hi Krzysztof
> >
> > Sorry but I didn't ignore your comment.
> >
> > For not breaking exciting boards I add the following patch in V2
> > https://lore.kernel.org/linux-arm-kernel/20220608095623.22327-11-tmaimon77@gmail.com/
>
> No, it does not solve it.
> 1. Patchset goes via separate trees (DTS are always separate), so it is
> not bisectable. One of the branches/trees will have broken DTS.
>
> 2. All out of tree DTSes are broken. This is expressed as ABI and - with
> some reasonable exceptions - you should not break it.
> https://elixir.bootlin.com/linux/v5.19-rc1/source/Documentation/devicetree/bindings/ABI.rst
>
> You have to keep backwards compatibility, so parse/handle both versions
> of DTS.
>
>
> Best regards,
> Krzysztof