[linux-sh:03338] Re: [linuxsh-dev] RTC (real time clock) question about sh4 7760

Sorry for replying; I got a mistake.

Thanks for answer and sorry again.

Fabio

On Thursday 07 October 2004 09:33, Paul Mundt wrote:
> On Thu, Oct 07, 2004 at 10:29:56AM +0000, Fabio Giovagnini wrote:
> > I'm porting linux sh onLogic PD lsh7760-10 board.
> > The sh4 7760 doesn't have an on chip RTC (while other sh4 processors
> > does),
>
> There are already plenty of boards that don't have the SH RTC. The
> Dreamcast is an example, the SH7300 and the SH73180 solution engines are
> another (this is why CONFIG_SH_RTC is selectable).
>
> > and the board I'm working on seems to have no RTC (maybe I2C bus
> > connected). So in such application I think there is no RTC available;
> > what is the best way to describe this? I think to write rtc.c rtc.h
> > modules and write the related funcions doing nothing.
> > Is it correct?
>
> No. If you have your own rtc, you can wrap into rtc_get_time/rtc_set_time.
> The dreamcast does this in arch/sh/boards/dreamcast/rtc.c for instance.
> Otherwise if you have a higher level rtc (such as via i2c), you can do this
> in drivers/char once you have established the necessary i2c work elsewhere.
>
> Note that CONFIG_RTC will still apply in this case, but CONFIG_SH_RTC will
> not.
>
> Also, as has been noted previously. Do _not_ start a new thread by replying
> to an old one. You've just cross posted the entire linux-kernel mailing
> list as a result of this.