[U-Boot-Users] dynamic setting of CONFIG_SYS_CLK_FREQ

Wolfgang Denk wd at denx.de
Mon Apr 26 13:13:02 CEST 2004

In message <408CE1D9.1080201 at intracom.gr> you wrote:
> We can do the same with environment variables.
> Let's partition the variables to two categories.

I see what you mean. But it might be not as easy.

> One will be the normal variables as we have now.
> The other we can refer to them as phantom variables;
> they are never written to persistant storage but live in
> RAM only. The version variable you refer is one of them.
> IMHO it's a more consistent interface.

Well, but how do you present it to the user? Will "printenv" show all
variables mixed? So how does the user know which get saved and  which
not?  How  do  you  merge  both  with  the standard CLI and hush in a
consistent way? And allthis without  (significantly)  increasing  the
memory footprint _and_ keeping the code readable?

> As for the state of Linux, we can try to migrate 2.6 to
> this interface.

Good idea.

Best regards,

Wolfgang Denk

Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd at denx.de
I paid too much for it, but its worth it.

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