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From: Geert Uytterhoeven <geert@linux-m68k.org>
Date: Wed, 16 Aug 2017 23:03:55 +0200
Message-ID: <CAMuHMdXB0aU6mdaTw02Fz-9Mr+Ums4_SLmtDgi8b2gE75SsMVg@mail.gmail.com>
Subject: Re: [RFC 2/5] i3c: Add core I3C infrastructure
To: Wolfram Sang <wsa@the-dreams.de>
Cc: Boris Brezillon <boris.brezillon@free-electrons.com>,
        Arnd Bergmann <arnd@arndb.de>, Linux I2C <linux-i2c@vger.kernel.org>,
        Jonathan Corbet <corbet@lwn.net>,
        "linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Przemyslaw Sroka <psroka@cadence.com>,
        Arkadiusz Golec <agolec@cadence.com>,
        Alan Douglas <adouglas@cadence.com>,
        Bartosz Folta <bfolta@cadence.com>, Damian Kos <dkos@cadence.com>,
        Alicja Jurasik-Urbaniak <alicja@cadence.com>,
        Jan Kotas <jank@cadence.com>, Cyprian Wronka <cwronka@cadence.com>,
        Alexandre Belloni <alexandre.belloni@free-electrons.com>,
        Thomas Petazzoni <thomas.petazzoni@free-electrons.com>,
        Nishanth Menon <nm@ti.com>, Rob Herring <robh+dt@kernel.org>,
        Pawel Moll <pawel.moll@arm.com>, Mark Rutland <mark.rutland@arm.com>,
        Ian Campbell <ijc+devicetree@hellion.org.uk>,
        Kumar Gala <galak@codeaurora.org>,
        "devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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On Tue, Aug 1, 2017 at 5:01 PM, Wolfram Sang <wsa@the-dreams.de> wrote:
>> I'm perfectly fine with the I3C / I2C framework separation. The only
>> minor problem I had with that was the inaccuracy of the
>> sysfs/device-model representation: we don't have one i2c and one i3c
>> bus, we just have one i3c bus with a mix of i2c and i3c devices.
>
> I understand that. What if I2C had the same seperation between the "bus"
> and the "master"?

There can be multiple masters on an i2c bus.  But not on an i3c bus, due
to SCL being push/pull.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds