On 8/3/08, Wolfgang Denk <[EMAIL PROTECTED]> wrote: > In message <[EMAIL PROTECTED]> you wrote: > > > > > What about creating a tool that parses a device tree and creates (or > > > updates) the board header file? This will retain compatibility with > > > other platforms, clean up the existing header files (they won't need > > > to contain as much information), and reduce the amount of changes to > > > U-Boot itself. > > > > That's a good idea. I have used variation on this concept in the past > > and they have worked out well. > > > A much more powerful concept is to have U-Boot read and interpret the > DT dynamically - only then can you use the same U-Boot binary image > on different board configurations, which is an important feature for > many board vendors.
I don't disagree with this but it is a lot more work. > > > A perfect tool would take a fully populated DTS file and use it to > > dynamically generate all of the needed header files to build uboot. > > More info would need to be added to the DTS file like DRAM timings, > > etc. But a DTS file is good place to track all of that info. The > > generated uboot image could contain a copy of the DTB and feed it to > > Linux. Allow the user to override the embedded DTB if necessary. > > > No, no, no. The DTB *must not* be included with the U-Boot image. It > shall always be kept separate so we canupdate it independently - > otherwise you lose a lot of advantages. A DTB is only about 8K. I was thinking that a user supplied one would override the one contained inside uboot. > > Best regards, > > Wolfgang Denk > > > -- > DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel > HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany > Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: [EMAIL PROTECTED] > Unsichtbar macht sich die Dummheit, indem sie immer größere Ausmaße > annimmt. -- Bertold Brecht: Der Tui-Roman > -- Jon Smirl [EMAIL PROTECTED] ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ U-Boot-Users mailing list U-Boot-Users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/u-boot-users
