Re: [Gumstix-users] rtc character driver

[Dave H. <dhy...@gm...>]

Hi,

On 12/1/06, tat...@ya... <tat...@ya...> wrote:
> Hi ! gumstix-users.
>
> Please help me.
> I tried to make rtc character driver for gumstix.
> But it didn't work properly.
>
> In the gumstix-buildroot/build-arm-nofpu/linux-2.6.18,
> recompile kernel to build rtc character modules
>     sa1100-rtc.ko
>     rtc-sa1100.ko

So I'm curious. Why would you expect the RTC for an SA1100 to work on a PXA255?

What type of RTC chip are you planning on using? Using the one on the
gumstix isn't particularly useful, since there is no backup battery,
and it would fail if the processor was reset anyways (i.e. any time
the watchdog timer goes off - say in response to a reboot command).

You really need to use an external RTC. I did a blurb on the DS1307 a
while back, although I haven't tested with a recent buildroot to see
if all still works:
http://docwiki.gumstix.org/I2C_DS1307

-- 
Dave Hylands
Vancouver, BC, Canada
http://www.DaveHylands.com/