linux-kernel - Re: [PATCH] add hardware I2C support for ARM IMX23

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Date:	Fri, 30 Nov 2012 17:32:24 +0100
From:	"sander van ginkel" <sander@...-ginkel.eu>
To:	"Wolfram Sang" <w.sang@...gutronix.de>
Cc:	linux-kernel@...r.kernel.org, kernel@...gutronix.de,
	shawn.guo@...aro.org, linux-arm-kernel@...ts.infradead.org,
	linux-i2c@...r.kernel.org
Subject: Re: [PATCH] add hardware I2C support for ARM IMX23

> You might want to try my for-next branch or wait for 3.8-rc1, maybe
the
> DMA termination patch helps? Also enabling I2C debug messages is
> probably worth it.
>
> Regards,
>
>    Wolfram
>
> --
> Pengutronix e.K.                           | Wolfram Sang
      |
> Industrial Linux Solutions                 |
http://www.pengutronix.de/  |
>

I've tested your git tree, with the same config as I used for the  
3.7.0-rc6 release (IMX i2c build in)
It's not a 100% fix

If I do "i2cdetect -y -r 0" with 3.7.0-rc6, i2cdetect gets confused  
and the kernel keeps dumping "mxs-i2c 80058000.i2c: Failed to get PIO  
reg. write descriptor."
If I do the same with your git release I get the same result, but only  
when i2cdetect is running. When it's finished or I terminate, the  
kprint will also disappear.
So there is some improvement but not 100% yet.


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