Tom Rini trini at
Wed Apr 7 07:14:39 EST 2004

On Tue, Apr 06, 2004 at 03:59:59PM -0500, Tolunay Orkun wrote:

> >> CONFIG_RTC (PC Architecture?)
> >>
> >> I also saw references to CONFIG_GEN_RTC_X with Google searches...
> >>
> >> I appreciate if someone explain me when to use each of these kernel
> >> config
> >> options?
> >
> > In the context of 2.4 or 2.6?
> 2.4

CONFIG_RTC is the "pc style" rtc driver, which works on a number of
arches, so long as they have a rtc chip found in PCs, and it can be
talked to as such.
GEN_RTC is a generic RTC driver, which offers hooks to the architectures
to do the hw-specific portions.  This _could_ be made to work with RTCs
over I2C, but at this time does not.
PPC_RTC is like the above, except it calls the PPC hooks directly, and
is obsolete (and gone in 2.6).

Tom Rini

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