From: Heiko Schocher <hs@denx.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH v2] Reset i2c slave devices during init on mpc5xxx cpus
Date: Sun, 06 Sep 2009 11:09:34 +0200 [thread overview]
Message-ID: <4AA37C4E.3060807@denx.de> (raw)
In-Reply-To: <20090903130433.M74652@coldhaus.com>
Hello Eric,
Eric Millbrandt wrote:
> Reset any i2c devices that may have been interrupted during a system reset.
> Normally this would be accomplished by clocking the line until SCL and SDA
> are released and then sending a start condtiion (From an Atmel datasheet).
> There is no direct access to the i2c pins so instead create start commands
> through the i2c interface. Send a start command then delay for the SDA Hold
> time, repeat this by disabling/enabling the bus a total of 9 times.
>
> Signed-off-by: Eric Millbrandt <emillbrandt@dekaresearch.com>
> ---
>
> changes since v1
> - Fixed compiler warning
Applied to u-boot-i2c.git
Thanks for your work,
bye
Heiko
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
prev parent reply other threads:[~2009-09-06 9:09 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-03 13:09 [U-Boot] [PATCH v2] Reset i2c slave devices during init on mpc5xxx cpus Eric Millbrandt
2009-09-06 9:09 ` Heiko Schocher [this message]
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