From: plaes@plaes.org (Priit Laes)
To: linux-arm-kernel@lists.infradead.org
Subject: [linux-sunxi] Re: [PATCH 3/3] sunxi: A20-OLinuXino-LIME2: Add i2c2 bus in DTS
Date: Sat, 02 Apr 2016 17:42:00 +0300 [thread overview]
Message-ID: <1459608120.29592.3.camel@plaes.org> (raw)
In-Reply-To: <20160402103420.GH4227@lukather>
On Sat, 2016-04-02 at 12:34 +0200, Maxime Ripard wrote:
> Hi,
>
> On Fri, Mar 25, 2016 at 08:04:07PM +0100, Michael Haas wrote:
> >
> > The A20 processor provides a third I2C bus on pins PB20 and PB21.
> > The A20-OLinuXino-LIME2 exposes this bus via its GPIO1 port.
> >
> > Olimex also provide a breakout board called the
> > A20-OLinuXino-LIME2-UEXT. This change is required to properly
> > support I2C on the UEXT connector found there.
Documentation for Olimex UEXT interface:
https://www.olimex.com/Products/Modules/UEXT/resources/UEXT_rev_B.pdf
Basically it *should* by default work as a board to board connector
which supports three serial communication interfaces: I2C, SPI and UART
(original document mentions RS232, but official modules work only with
3.3V logic levels).
> >
> > Signed-off-by: Michael Haas <haas@computerlinguist.org>
> What are the other options on that pin? Is it something exclusively
> dedicated to i2c on the pin headers and the documentation, or is
> anyone free to use that pin for whatever he wishes?
>
> Thanks,
> Maxime
>
> --?
> Maxime Ripard, Free Electrons
> Embedded Linux, Kernel and Android engineering
> http://free-electrons.com
>
next prev parent reply other threads:[~2016-04-02 14:42 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-25 19:04 [PATCH 1/3] sunxi: A20-OLinuXino-LIME2: Fix ldo3/ldo4 in DTS Michael Haas
2016-03-25 19:04 ` [PATCH 2/3] sunxi: A20-OLinuXino-LIME2: Add usb-power-supply Michael Haas
2016-03-26 0:48 ` [linux-sunxi] " Iain Paton
2016-04-02 10:36 ` Maxime Ripard
2016-05-01 6:46 ` [linux-sunxi] " Michael Haas
2016-05-02 11:07 ` Maxime Ripard
2016-03-25 19:04 ` [PATCH 3/3] sunxi: A20-OLinuXino-LIME2: Add i2c2 bus in DTS Michael Haas
2016-03-26 0:48 ` [linux-sunxi] " Iain Paton
2016-04-02 10:34 ` Maxime Ripard
2016-04-02 14:42 ` Priit Laes [this message]
2016-04-02 16:21 ` [linux-sunxi] " Michael Haas
2016-04-10 10:32 ` Maxime Ripard
2016-03-26 0:58 ` [linux-sunxi] [PATCH 1/3] sunxi: A20-OLinuXino-LIME2: Fix ldo3/ldo4 " Iain Paton
2016-03-26 8:56 ` Iain Paton
2016-03-27 8:08 ` Michael Haas
2016-03-28 13:01 ` Hans de Goede
2016-03-29 12:03 ` Maxime Ripard
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1459608120.29592.3.camel@plaes.org \
--to=plaes@plaes.org \
--cc=linux-arm-kernel@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.