[U-Boot-Users] Using a second I2C interface

[Woodruff, Richard]

I've can post a diff to some code we use to do this.  I didn't look at
it to closely, but it has worked well.  Select a device, then standard
commands go to it.

Regards,
Richard W.

> A clean design should allow to switch I2C  busses  usign  a  command;
> additionally,  I think we should try to stay backward-compatible with
> the existing code. Eventually this is not too difficult:  similar  to
> the  "ide"  or  "usb"  commands  we  could  create a new command "i2c
> device" which takes as argument the number of the I2C bus which  shal
> become  the  current  (=  active)  bus. Then all existing I2C related
> commands can be left unchanged (and "i2c  device"  without  arguments
> should of course print the ID of the current bus).
> 
> In parallel, existing I2C commands could be changed to migrate  to  a
> new  "i2c"  group  of  commands:  "imd"  would become "i2c md", "imw"
> becomes "i2c mw", "iprobe" becomes "i2c probe", etc. For some  (long)
> transition  period old and new commands could be provided in parallel
> (at least optionally). Later, the old syntax could be dropped.
> 
> Best regards,
> 
> Wolfgang Denk
> 
> --
> Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
> Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
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> 
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