[U-Boot] [PATCH] ARM: tegra: make all I2C ports open-drain

[Tom Warren]

I've updated u-boot-tegra/next with this patch, rebased it against ARM master, and pushed it to Denx. All tegra boards build OK.

Albert - if you want, you can use u-boot-tegra/next to bring in this patch, or apply it to ARM master yourself, or I can do a formal PR. Let me know. Or TomR can just apply it to Denx master.

Tom

> -----Original Message-----
> From: Stephen Warren [mailto:swarren at wwwdotorg.org]
> Sent: Friday, March 21, 2014 11:31 AM
> To: u-boot at lists.denx.de; Simon Glass; Tom Warren; Stephen Warren
> Cc: Tom Rini
> Subject: Re: [U-Boot] [PATCH] ARM: tegra: make all I2C ports open-drain
> 
> On 03/12/2014 01:10 PM, Stephen Warren wrote:
> > From: Stephen Warren <swarren at 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.
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