From: Geert Uytterhoeven <geert@linux-m68k.org>
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>
Subject: Re: [RFC 2/5] i3c: Add core I3C infrastructure
Date: Wed, 16 Aug 2017 23:03:55 +0200 [thread overview]
Message-ID: <CAMuHMdXB0aU6mdaTw02Fz-9Mr+Ums4_SLmtDgi8b2gE75SsMVg@mail.gmail.com> (raw)
In-Reply-To: <20170801150108.GC1450@katana>
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
WARNING: multiple messages have this Message-ID (diff)
From: Geert Uytterhoeven <geert-Td1EMuHUCqxL1ZNQvxDV9g@public.gmane.org>
To: Wolfram Sang <wsa-z923LK4zBo2bacvFa/9K2g@public.gmane.org>
Cc: Boris Brezillon
<boris.brezillon-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>,
Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>,
Linux I2C <linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Jonathan Corbet <corbet-T1hC0tSOHrs@public.gmane.org>,
"linux-doc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-doc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Greg Kroah-Hartman
<gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org>,
Przemyslaw Sroka <psroka-vna1KIf7WgpBDgjK7y7TUQ@public.gmane.org>,
Arkadiusz Golec <agolec-vna1KIf7WgpBDgjK7y7TUQ@public.gmane.org>,
Alan Douglas <adouglas-vna1KIf7WgpBDgjK7y7TUQ@public.gmane.org>,
Bartosz Folta <bfolta-vna1KIf7WgpBDgjK7y7TUQ@public.gmane.org>,
Damian Kos <dkos-vna1KIf7WgpBDgjK7y7TUQ@public.gmane.org>,
Alicja Jurasik-Urbaniak
<alicja-vna1KIf7WgpBDgjK7y7TUQ@public.gmane.org>,
Jan Kotas <jank-vna1KIf7WgpBDgjK7y7TUQ@public.gmane.org>,
Cyprian Wronka <cwronka-vna1KIf7WgpBDgjK7y7TUQ@public.gmane.org>,
Alexandre Belloni
<alexandre.belloni-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>,
Thomas Petazzoni
<thomas.petazzoni-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>,
Nishanth Menon <nm-l0cyMroinI0@public.gmane.org>,
Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Pawel Moll <pawel.moll@ar>
Subject: Re: [RFC 2/5] i3c: Add core I3C infrastructure
Date: Wed, 16 Aug 2017 23:03:55 +0200 [thread overview]
Message-ID: <CAMuHMdXB0aU6mdaTw02Fz-9Mr+Ums4_SLmtDgi8b2gE75SsMVg@mail.gmail.com> (raw)
In-Reply-To: <20170801150108.GC1450@katana>
On Tue, Aug 1, 2017 at 5:01 PM, Wolfram Sang <wsa-z923LK4zBo2bacvFa/9K2g@public.gmane.org> 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-Td1EMuHUCqxL1ZNQvxDV9g@public.gmane.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
--
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next prev parent reply other threads:[~2017-08-16 21:03 UTC|newest]
Thread overview: 91+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-31 16:24 [RFC 0/5] Add I3C subsystem Boris Brezillon
2017-07-31 16:24 ` [RFC 1/5] i2c: Export of_i2c_get_board_info() Boris Brezillon
2017-07-31 16:24 ` [RFC 2/5] i3c: Add core I3C infrastructure Boris Brezillon
2017-07-31 19:17 ` Wolfram Sang
2017-07-31 19:17 ` Wolfram Sang
2017-07-31 20:46 ` Boris Brezillon
2017-07-31 20:46 ` Boris Brezillon
2017-07-31 20:16 ` Arnd Bergmann
2017-07-31 20:16 ` Arnd Bergmann
2017-07-31 21:15 ` Boris Brezillon
2017-07-31 21:15 ` Boris Brezillon
2017-07-31 21:32 ` Peter Rosin
2017-07-31 21:32 ` Peter Rosin
2017-07-31 21:42 ` Wolfram Sang
2017-07-31 21:42 ` Wolfram Sang
2017-08-01 16:47 ` Andrew F. Davis
2017-08-01 16:47 ` Andrew F. Davis
2017-08-01 17:27 ` Wolfram Sang
2017-08-01 17:27 ` Wolfram Sang
2017-08-01 21:47 ` Boris Brezillon
2017-08-01 21:47 ` Boris Brezillon
2017-08-02 10:21 ` Wolfram Sang
2017-08-02 10:21 ` Wolfram Sang
2017-08-01 12:00 ` Arnd Bergmann
2017-08-01 12:00 ` Arnd Bergmann
2017-08-01 12:29 ` Boris Brezillon
2017-08-01 12:29 ` Boris Brezillon
2017-08-01 13:11 ` Arnd Bergmann
2017-08-01 13:11 ` Arnd Bergmann
2017-08-01 13:34 ` Boris Brezillon
2017-08-01 13:34 ` Boris Brezillon
2017-08-01 13:58 ` Boris Brezillon
2017-08-01 13:58 ` Boris Brezillon
2017-08-01 14:22 ` Arnd Bergmann
2017-08-01 14:22 ` Arnd Bergmann
2017-08-01 15:14 ` Boris Brezillon
2017-08-01 15:14 ` Boris Brezillon
2017-08-01 20:16 ` Arnd Bergmann
2017-08-01 20:16 ` Arnd Bergmann
2017-08-01 14:12 ` Wolfram Sang
2017-08-01 14:12 ` Wolfram Sang
2017-08-01 14:48 ` Boris Brezillon
2017-08-01 14:48 ` Boris Brezillon
2017-08-01 15:01 ` Wolfram Sang
2017-08-01 15:01 ` Wolfram Sang
2017-08-01 15:20 ` Boris Brezillon
2017-08-01 15:20 ` Boris Brezillon
2017-08-03 8:03 ` Boris Brezillon
2017-08-03 8:03 ` Boris Brezillon
2017-08-16 21:03 ` Geert Uytterhoeven [this message]
2017-08-16 21:03 ` Geert Uytterhoeven
2017-08-17 7:48 ` Boris Brezillon
2017-08-17 7:48 ` Boris Brezillon
2017-08-01 1:40 ` Greg Kroah-Hartman
2017-08-01 1:40 ` Greg Kroah-Hartman
2017-08-01 10:48 ` Boris Brezillon
2017-08-01 10:48 ` Boris Brezillon
2017-08-01 17:51 ` Greg Kroah-Hartman
2017-08-01 17:51 ` Greg Kroah-Hartman
2017-08-01 21:30 ` Boris Brezillon
2017-08-01 21:30 ` Boris Brezillon
2017-08-02 0:54 ` Greg Kroah-Hartman
2017-08-02 0:54 ` Greg Kroah-Hartman
2017-08-02 2:13 ` Greg Kroah-Hartman
2017-08-02 2:13 ` Greg Kroah-Hartman
2017-12-13 16:20 ` Boris Brezillon
2017-12-13 16:20 ` Boris Brezillon
2017-12-13 16:51 ` Greg Kroah-Hartman
2017-12-13 16:51 ` Greg Kroah-Hartman
2017-08-17 9:03 ` Linus Walleij
2017-08-17 9:03 ` Linus Walleij
2017-08-17 9:28 ` Boris Brezillon
2017-08-17 9:28 ` Boris Brezillon
2017-07-31 16:24 ` [RFC 3/5] dt-bindings: i3c: Document core bindings Boris Brezillon
2017-07-31 16:24 ` Boris Brezillon
2017-08-09 23:43 ` Rob Herring
2017-08-09 23:43 ` Rob Herring
2017-08-10 8:49 ` Boris Brezillon
2017-08-10 8:49 ` Boris Brezillon
2017-07-31 16:24 ` [RFC 4/5] i3c: master: Add driver for Cadence IP Boris Brezillon
2017-07-31 16:24 ` [RFC 5/5] dt-bindings: i3c: Document Cadence I3C master bindings Boris Brezillon
2017-07-31 19:17 ` [RFC 0/5] Add I3C subsystem Wolfram Sang
2017-07-31 19:17 ` Wolfram Sang
2017-07-31 20:40 ` Boris Brezillon
2017-07-31 20:40 ` Boris Brezillon
2017-07-31 20:47 ` Wolfram Sang
2017-07-31 20:47 ` Wolfram Sang
2017-12-12 19:58 ` Boris Brezillon
2017-12-12 19:58 ` Boris Brezillon
2017-12-12 22:01 ` Wolfram Sang
2017-12-12 22:01 ` Wolfram Sang
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