From: Boris Brezillon <boris.brezillon@bootlin.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Wolfram Sang <wsa@the-dreams.de>,
linux-i2c@vger.kernel.org, Jonathan Corbet <corbet@lwn.net>,
"open list:DOCUMENTATION" <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>,
Cyprian Wronka <cwronka@cadence.com>,
Suresh Punnoose <sureshp@cadence.com>,
Rafal Ciepiela <rafalc@cadence.com>,
Thomas Petazzoni <thomas.petazzoni@bootlin.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.or>
Subject: Re: [PATCH v5 04/10] dt-bindings: i3c: Document core bindings
Date: Wed, 11 Jul 2018 16:45:29 +0200 [thread overview]
Message-ID: <20180711164529.3388d045@bbrezillon> (raw)
In-Reply-To: <CAK8P3a1gyvvpKdVV+STOJXd-=BFdiFF638F0agXur0kLYP7ksw@mail.gmail.com>
On Wed, 11 Jul 2018 16:10:10 +0200
Arnd Bergmann <arnd@arndb.de> wrote:
> On Fri, Jun 22, 2018 at 12:49 PM, Boris Brezillon
> <boris.brezillon@bootlin.com> wrote:
> > A new I3C subsystem has been added and a generic description has been
> > created to represent the I3C bus and the devices connected on it.
> >
>
> > +I2C devices
> > +===========
> > +
> > +Each I2C device connected to the bus should be described in a subnode. All
> > +properties described in Documentation/devicetree/bindings/i2c/i2c.txt are
> > +valid here, but several new properties have been added.
> > +
> > +New constraint on existing properties:
> > +--------------------------------------
> ...
> > + + third cell: should be 0
>
> What for? Just to be future-proof, or do you have something specific
> in mind here?
Even if I2C devices only need 1 cell, I3C devices need 3 (1 for the
static address and 2 for the PID). Since both type of devices are
described under the same bus node, and we can have different
#address-cells, I had to put 0-padding in the last cell.
next prev parent reply other threads:[~2018-07-11 14:45 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-22 10:49 [PATCH v5 00/10] Add the I3C subsystem Boris Brezillon
2018-06-22 10:49 ` [PATCH v5 01/10] i3c: Add core I3C infrastructure Boris Brezillon
2018-06-22 21:35 ` Peter Rosin
2018-06-23 10:17 ` Boris Brezillon
2018-06-23 21:40 ` Peter Rosin
2018-06-24 12:02 ` Boris Brezillon
2018-06-24 21:55 ` Peter Rosin
2018-06-25 8:03 ` Boris Brezillon
2018-06-28 15:38 ` vitor
2018-06-28 21:02 ` Boris Brezillon
2018-07-11 14:05 ` Arnd Bergmann
2018-06-22 10:49 ` [PATCH v5 02/10] docs: driver-api: Add I3C documentation Boris Brezillon
2018-06-26 21:07 ` Randy Dunlap
2018-06-27 7:20 ` Boris Brezillon
2018-06-22 10:49 ` [PATCH v5 03/10] i3c: Add sysfs ABI spec Boris Brezillon
2018-06-22 10:49 ` [PATCH v5 04/10] dt-bindings: i3c: Document core bindings Boris Brezillon
2018-07-11 14:10 ` Arnd Bergmann
2018-07-11 14:45 ` Boris Brezillon [this message]
2018-07-11 14:56 ` Arnd Bergmann
2018-06-22 10:49 ` [PATCH v5 05/10] dt-bindings: i3c: Add macros to help fill I3C/I2C device's reg property Boris Brezillon
2018-06-22 10:49 ` [PATCH v5 06/10] MAINTAINERS: Add myself as the I3C subsystem maintainer Boris Brezillon
2018-06-22 10:49 ` [PATCH v5 07/10] i3c: master: Add driver for Cadence IP Boris Brezillon
2018-07-11 14:19 ` Arnd Bergmann
2018-06-22 10:49 ` [PATCH v5 08/10] dt-bindings: i3c: Document Cadence I3C master bindings Boris Brezillon
2018-06-22 10:49 ` [PATCH v5 09/10] gpio: Add a driver for Cadence I3C GPIO expander Boris Brezillon
2018-06-22 16:04 ` Randy Dunlap
2018-06-22 18:35 ` Boris Brezillon
2018-06-26 19:07 ` Andy Shevchenko
2018-06-26 19:56 ` Boris Brezillon
2018-06-26 20:44 ` Andy Shevchenko
2018-06-26 21:46 ` Boris Brezillon
2018-06-27 17:53 ` Andy Shevchenko
2018-06-27 19:36 ` Boris Brezillon
2018-06-27 22:54 ` Joe Perches
2018-06-28 0:00 ` Andy Shevchenko
2018-06-28 0:50 ` Joe Perches
2018-06-27 22:14 ` Linus Walleij
2018-06-28 4:08 ` Wolfram Sang
2018-06-22 10:49 ` [PATCH v5 10/10] dt-bindings: gpio: Add bindings for Cadence I3C gpio expander Boris Brezillon
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