[U-Boot-Users] Proposal to add "ispeed" (I2C speed) command

[Stephan Linz]

Am Donnerstag,  4. März 2004 14:21 schrieb Wolfgang Denk:
> In message <04030413332001.12732 at pcj86> you wrote:
> > This 'could' be usefull to speed up the i2c communication if there are
> > more than one i2c devices with significant differences between the clock
> > timing; ex. 27C32 (100kHz at 3.3V) and LM75 (400kHz). Tolunay has spoken
> > about like this. But right I see now reason to do so, too. U-Boot has to
                             ^^^^^^^^^
OOPS, this was a small but fine typing error, should be:

" ... But right I see _NO_ reason to do so, too. ... "


(that's life)

> > be a boot loader not a performant operator...
>
> Do you think it is legal to clock the I2C bus at 400 kHz  when  there
> are  devices  on  the bus that are spec'ed only for 100 kHz? I may be
> wrong, but such an idea sounds awfully risky to me.

You're right, see above :-)


Best Regards,
Stephan Linz