I2C RTC causes boot delay...

Joakim Tjernlund joakim.tjernlund at lumentis.se
Tue Apr 8 22:36:07 EST 2003


> > You may also want to add an "I2C reset sequence" in your firmware/kernel
> > if your I2C clock gets stuck and don't respond(can happen if reset/power down while
> > reading the RTC). Look in u-boot for details.
>
> Yeah. I know. I should put into PPCBoot/U-Boot.
> But in the docs it says it's only for SOFT_I2C aka bitbang!
> So
> a) can I toggle the pins using GPIO and still use HARD_I2C? or
> b) can I use SOFT_I2C in PPCBoot and CPM I2C (8xx-algo) under linux?

You can do alt. b(I do, NP). Maybe it's possible to make HW I2C do
the same, but I havn't checked.

 Jocke


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