I2C RTC causes boot delay...
Wolfgang Denk
wd at denx.de
Tue Apr 8 22:57:21 EST 2003
In message <3E92BE98.4090907 at imc-berlin.de> you wrote:
>
> Yeah. I know. I should put into PPCBoot/U-Boot.
It's arelady there.
> But in the docs it says it's only for SOFT_I2C aka bitbang!
Right, because you cannot toogle the pins at your liking with the
CPM's I2C controller.
> a) can I toggle the pins using GPIO and still use HARD_I2C? or
Yes, you can. But this has not been implemented yet. And if you do,
you will find you have copied 90% of the soft_i2c driver so why not
use this from the beginning? Using HARD_I2C has _zero_ advantage for
U-Boot.
> b) can I use SOFT_I2C in PPCBoot and CPM I2C (8xx-algo) under linux?
Yes, you can.
Best regards,
Wolfgang Denk
--
Software Engineering: Embedded and Realtime Systems, Embedded Linux
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