From: Stephen Warren <swarren@wwwdotorg.org>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH] ARM: tegra: make all I2C ports open-drain
Date: Fri, 21 Mar 2014 12:30:40 -0600 [thread overview]
Message-ID: <532C8550.8070508@wwwdotorg.org> (raw)
In-Reply-To: <1394651444-24134-1-git-send-email-swarren@wwwdotorg.org>
On 03/12/2014 01:10 PM, Stephen Warren wrote:
> From: Stephen Warren <swarren@nvidia.com>
>
> I2C protocol requires open-drain IOs. Fix the Dalmore and Venice2 pinmux
> tables to configure the IOs correctly. Without this, Tegra may actively
> drive the lines high while an external device is actively driving the
> lines low, which can only lead to bad things.
Tom (or Tom or Albert),
This one patch should really be applied as a bug-fix for v2014.04. It'd
be good to get it applied soon.
The other large pinmux series I sent can obviously wait until the next
release.
next prev parent reply other threads:[~2014-03-21 18:30 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-12 19:10 [U-Boot] [PATCH] ARM: tegra: make all I2C ports open-drain Stephen Warren
2014-03-21 18:30 ` Stephen Warren [this message]
2014-03-21 21:27 ` Tom Warren
2014-03-26 19:54 ` Stephen Warren
2014-03-28 15:42 ` Tom Rini
2014-03-21 20:37 ` Simon Glass
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