svn commit: r191322 - in head/sys: arm/conf dev/iicbus
ticso at cicely7.cicely.de
Wed Apr 22 00:06:05 UTC 2009
On Tue, Apr 21, 2009 at 08:58:42PM +0200, Rafal Jaworowski wrote:
> On 2009-04-21, at 20:38, M. Warner Losh wrote:
> >In message: <20090421223502.507f0dcf.stas at FreeBSD.org>
> >Consider one kernel. Two different boards. Different RTC chips on
> >each of these boards. Hints loaded from the boot loader. Now, on one
> >board the ds1672 is used, on the other a ds163x is used. How does the
> >right driver get attached in that case?
> If these boards are different, they are supposed to have different
> dedicated hints; doesn't this solve your concerns?
For the same reason we have
And not just
Each driver needs its own private hints.
You can have a kernel compiled with multiple rtc to support a board
family and just tune the hint for a specific board.
This is embedded stuff, people might want to use board X and add
e.g. the BWCT board has a DS1672, but also an iic header.
For whatever reason someone might want another rtc and simply adds one
to the iic header.
Say that this person has multiple boards in use - some with the special
rtc and the others not.
You can as easily add a DS1672 to a normal PC if the onboard rtc isn't
sufficient for your need.
B.Walter <bernd at bwct.de> http://www.bwct.de
Modbus/TCP Ethernet I/O Baugruppen, ARM basierte FreeBSD Rechner uvm.
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