[U-Boot-Users] Re: U-Boot for AT91RM9200DK
wd at denx.de
Sat Oct 25 20:52:16 CEST 2003
in message <3F993A32.80709 at imc-berlin.de> you wrote:
> > By necessity u-boot is already nearing #ifdef hell because it
> > supports so many devel boards (which is good). If we all threw
> > our specific board design stuff in there, I don't think anyone in
> > their right mind would use u-boot.
> Probably a misunderstanding!
Yes, on Rick's side.
> How I am supposed to setup clocks and PLLs and serial port in the AT91RM9200 if
> I don't have any informations?
> I thought of something like this in start.S:
> #ifdef CFG_USE_EXT_CRYSTAL
> /* set up PLL */
> set PLLA to CFG_PLLAR
> set PLLB to CFG_PLLBR
Looks clean to me. Probably even better would be to call
"init_clocks" (or a function with a similar name) in start.S for
_all_ boards, including the "at91rm9200dk".
Just for the record: the "at91rm9200dk" ist just one out of many
boards. It is in no way better than any other board. "at91rm9200dk"
dependend code shall be removed from the files in the cpu/at91rm9200
> And the user just has to define CFG_USE_EXT_CRYSTAL, CFG_PLLAR etc in his board
> specific header file. Of course without the need to submit his configuration to
> the U-Boot CVS.
I don't understand this last sentence.
Either you are maintaining his own private version of U-Boot (in
which case we don't care, and you don't need to ask for help on this
mailing list which is dedicated to the _public_ source tree only), or
you are working with the public version of U-Boot, in which case your
board configuration obviously resides in the U-Boot CVS tree.
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd at denx.de
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