I2C implementation on MPC8260

I2C implementation on MPC8260

[Jos Beck]

Hi,

I am trying to get some i2c devices (RTC, EEPROM) to run on an MPC8260
with kernel version 2.4.21.
I have seen some fragmented information in the kernel source
documentation and on this mailing list, but it's not clear to me what
parts I can use and what I have to write myself.

Could anyone tell me where and how to start?


Thanks,

Jos


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Re: I2C implementation on MPC8260

[Wolfgang Denk]

In message <4098B547.5070101@euronet.nl> you wrote:
>
> I am trying to get some i2c devices (RTC, EEPROM) to run on an MPC8260
> with kernel version 2.4.21.

Use a more recent kernel.

> I have seen some fragmented information in the kernel source
> documentation and on this mailing list, but it's not clear to me what
> parts I can use and what I have to write myself.
>
> Could anyone tell me where and how to start?

The linuxppc_2_4_devel tree on our CVS server has I2C support for the
8260,  and  also  includes  several  I2C  based  RTC   modules.   See
http://www.denx.de/re/linux.html

Best regards,

Wolfgang Denk

--
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd@denx.de
By the way, ALL software projects are done by iterative  prototyping.
Some companies call their prototypes "releases", that's all.

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Re: I2C implementation on MPC8260

[Jaap-Jan Boor]

On Wed, 2004-05-05 at 11:35, Jos Beck wrote:
> Hi,
>
> I am trying to get some i2c devices (RTC, EEPROM) to run on an MPC8260
> with kernel version 2.4.21.
> I have seen some fragmented information in the kernel source
> documentation and on this mailing list, but it's not clear to me what
> parts I can use and what I have to write myself.
>
> Could anyone tell me where and how to start?

I think you need i2c-core.c, i2c-dev.c, i2c-algo-8260.c and
a driver file that set's up (board specific) i2c port settings
and irq. I think there are examples in the denx tree.
(i2c-pm826.c)

This is more or less the standard thing to do:
check the denx tree.

Jaap-Jan
>
>
> Thanks,
>
> Jos
>
>
--
J.G.J. Boor                       Anton Philipsweg 1
Software Engineer                 1223 KZ Hilversum
AimSys bv                         tel. +31 35 689 1941
Postbus 2194, 1200 CD Hilversum   mailto:jjboor@aimsys.nl


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Re: I2C implementation on MPC8260

[Jos Beck]

Thanks for the info!


Jos


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