linux-kernel - Re: [RESEND PATCH v5 00/16] eeprom: at24: Add OF device ID table

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Message-ID: <CABxcv=kSiqDN1=9fSfLkyW=uuXQZAoW4dhw=fco9RyOdDuPAdA@mail.gmail.com>
Date:   Tue, 29 Aug 2017 10:44:09 +0200
From:   Javier Martinez Canillas <javier@...hile0.org>
To:     Wolfram Sang <wsa@...-dreams.de>
Cc:     Linux Kernel <linux-kernel@...r.kernel.org>,
        Rob Herring <robh@...nel.org>, Florian Larysch <fl@...1.de>,
        David Lechner <david@...hnology.com>,
        Rob Herring <robh+dt@...nel.org>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Sören Brinkmann <soren.brinkmann@...inx.com>,
        Simon Horman <horms@...ge.net.au>,
        Michal Simek <michal.simek@...inx.com>,
        Dinh Nguyen <dinguyen@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        Will Deacon <will.deacon@....com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Sekhar Nori <nsekhar@...com>, Scott Wood <oss@...error.net>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Joachim Eastwood <manabian@...il.com>,
        Mark Rutland <mark.rutland@....com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Santosh Shilimkar <ssantosh@...nel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        Paul Mackerras <paulus@...ba.org>,
        Magnus Damm <magnus.damm@...il.com>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        Uwe Kleine-König <kernel@...gutronix.de>,
        Linux I2C <linux-i2c@...r.kernel.org>
Subject: Re: [RESEND PATCH v5 00/16] eeprom: at24: Add OF device ID table

Hello Wolfram,

On Mon, Aug 28, 2017 at 6:01 PM, Wolfram Sang <wsa@...-dreams.de> wrote:
>
>> > But there is a dependency, no? If I apply the driver patch,
>> > non-converted device trees will not find their eeproms anymore. So, I
>>
>> I don't think that's correct. If you apply this patch before the DTS
>> changes, the driver will still match using the I2C device ID table
>> like it has been doing it until today.
>
> My tests do not confirm this. If I add a node with a "renesas,24c01"
> compatible to my board, it works before your patch, but not after. If I
> change it to "atmel,24c01" it works even after your patch. I haven't
> looked into it, though, maybe i2c_of_match_device_sysfs() is stepping on
> our foots here?
>
> Did you test and did it work for you?
>

I would swear that I tested both combinations (driver patch without DT
changes and DTS changes without driver patch), but it was months ago
when I first posted the patches so I may misremembering.

I don't have a DT based system at hand now, but I'll test it again and
let you know probably tomorrow.

Best regards,
Javier