MPC5200 I2C unstable?

MPC5200 I2C unstable?

[Kimmo Surakka]

Hi,

I'm using a MPC5200 based board (namely TQM5200) and the 
linuxppc_2_4_devel-2005-10-25-1440 kernel from denx.de. To get the serial 
ports more stable, I've applied the serial port patch by Achim Machura (can 
be found in 
http://marc.theaimsgroup.com/?l=linuxppc-embedded&m=112901824515097&w=2). The 
patch needed small adjustments, but nothing too large -- mostly different 
line numbers.

Also, to get the first I2C interface to work, I've had to change the file 
drivers/i2c/i2c-tqm5200.c followingly:

-#define MPC5xxx_I2C1_ENABLE    0       /* Disable  */
+#define MPC5xxx_I2C1_ENABLE    1       /* Enable   */

The code compiles OK, but the I2C bus gets stuck after a short while. Has 
anyone else experienced something similar? I tried to Google for information 
but didn't find anything relevant. Maybe I just didn't know the right 
keywords to search for?

Thanks in advance,

Kimmo Surakka

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Re: MPC5200 I2C unstable?

[Arno Geissel]

As far as I know there are hardware problems on the MPC5200 I2C
interface. They should be solved in the revision B

Arno

> Hi,
>
> I'm using a MPC5200 based board (namely TQM5200) and the
> linuxppc_2_4_devel-2005-10-25-1440 kernel from denx.de. To get the serial
> ports more stable, I've applied the serial port patch by Achim Machura (can
> be found in
> http://marc.theaimsgroup.com/?l=linuxppc-embedded&m=112901824515097&w=2).
> The patch needed small adjustments, but nothing too large -- mostly
> different line numbers.
>
> Also, to get the first I2C interface to work, I've had to change the file
> drivers/i2c/i2c-tqm5200.c followingly:
>
> -#define MPC5xxx_I2C1_ENABLE    0       /* Disable  */
> +#define MPC5xxx_I2C1_ENABLE    1       /* Enable   */
>
> The code compiles OK, but the I2C bus gets stuck after a short while. Has
> anyone else experienced something similar? I tried to Google for
> information but didn't find anything relevant. Maybe I just didn't know the
> right keywords to search for?
>
> Thanks in advance,
>
> Kimmo Surakka
>
> This message has been scanned by F-Secure Anti-Virus
>
> ###  OXFORD INSTRUMENTS   http://www.oxford-instruments.com/  ###
>
> Unless stated above to be non-confidential, this E-mail and any
> attachments are private and confidential and are for the addressee
> only and may not be used, copied or disclosed save to the addressee.
> If you have received this E-mail in error please notify us upon receipt
> and delete it from your records. Internet communications are not secure
> and Oxford Instruments is not responsible for their abuse by third
> parties nor for any alteration or corruption in transmission.
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