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 <20210730144922.29111-12-semen.protsenko@linaro.org> <d603be80-4fb6-1bad-1963-c9fa7d1e63fb@canonical.com>
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From:   Sam Protsenko <semen.protsenko@linaro.org>
Date:   Tue, 3 Aug 2021 15:58:38 +0300
Message-ID: <CAPLW+4mPeSOuiQ1iYTVXqTzmPP7o1uPX8Gapzr7Es0wRBpYt6g@mail.gmail.com>
Subject: Re: [PATCH 11/12] dt-bindings: interrupt-controller: Add IRQ
 constants for Exynos850
To:     Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Cc:     Sylwester Nawrocki <s.nawrocki@samsung.com>,
        Chanwoo Choi <cw00.choi@samsung.com>,
        Linus Walleij <linus.walleij@linaro.org>,
        Tomasz Figa <tomasz.figa@gmail.com>,
        Rob Herring <robh+dt@kernel.org>,
        Stephen Boyd <sboyd@kernel.org>,
        Michael Turquette <mturquette@baylibre.com>,
        Jiri Slaby <jirislaby@kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Charles Keepax <ckeepax@opensource.wolfsonmicro.com>,
        Ryu Euiyoul <ryu.real@samsung.com>,
        Tom Gall <tom.gall@linaro.org>,
        Sumit Semwal <sumit.semwal@linaro.org>,
        John Stultz <john.stultz@linaro.org>,
        Amit Pundir <amit.pundir@linaro.org>,
        devicetree <devicetree@vger.kernel.org>,
        linux-arm Mailing List <linux-arm-kernel@lists.infradead.org>,
        linux-clk <linux-clk@vger.kernel.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linux Samsung SOC <linux-samsung-soc@vger.kernel.org>,
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On Sat, 31 Jul 2021 at 11:45, Krzysztof Kozlowski
<krzysztof.kozlowski@canonical.com> wrote:
>
> On 30/07/2021 16:49, Sam Protsenko wrote:
> > Add external GIC interrupt constants for SPI[479:0] for Exynos850 SoC.
> > Interrupt names were taken from TRM without change, hence double
> > underscore in const namings.
>
> I am not sure what is the benefit of defining these in header. Unlike
> other DT consts (e.g. clock IDs) drivers do not us them at all. Using
> them in DT does not reduce chance of mistakes in numbers - instead of in
> DTS you can make a mistake here in header file. In the same time, they
> grow the interrupt property in DTS making it more difficult to read.
>
> I also did not see anyone else using this approach, so it's not only me
> (Marc also find it confusing).
>
> If vendor kernel did similar, it's not an argument. Samsung LSI /.
> vendor kernel has terrible code quality so usually it is not a good example.
>

Agreed. I'll use IRQ numbers in dts directly, in v2. I probably
thought that IRQ header might replace missing public TRM, but that's a
poor substitute anyway.

>
> Best regards,
> Krzysztof