[PATCH 2/2] ARM: dts: imx28: Adjust i2c interrupt bindings

[jbe@pengutronix.de (Juergen Beisert)]

Hi Marek,

Marek Vasut wrote:
> > > i2c slowness is a different issue.
> >
> > Same happens here for my i.M23 based platform. It seems the PIO mode does
> > not work, or at least not like it works on a i.MX28. Each short transfer
> > needs about one second (without an error message) but does not send
> > anything on the I2C lines.
> >
> > I need the following patches to make I2C master work within a 3.10-rc2
> > kernel:
> >
> > Subject: [PATCH] I2C/MXS: distinguish i.MX23 and i.MX28 based I2C
>
> I'm all for it, but then ... won't it be better if you actually fixed the
> PIO and mixed-mode on MX23 instead of implementing such hack?

If the PIO mode or my patch is a hack depends on the point of view: Lucas told 
me the PIO mode is *mentioned* but *not specified* in the i.MX23/i.MX28 
datasheets.
So, the PIO mode seems to depend on some undocumented status bits in the 
i.MX28 I2C controller implementation.

Regards,
Juergen

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