Kumar Gala wrote: > > On Jul 9, 2008, at 10:17 AM, Jerry Van Baren wrote: > >> Kumar Gala wrote: >>> If the path we are trying to print doesn't exist see if it matches an >>> aliases. We don't do anything fancy at this point, but just strip the >>> leading '/' if it exists and see if we have an exact match to an alias. >>> In the future we could try and prefix matching so the alias could be >>> used >>> as a shorter path reference. >>> Signed-off-by: Kumar Gala <[EMAIL PROTECTED]> >> >> Cool and useful too. Out of curiousity, does "real" Open Firmware do >> this sort of thing with aliases? > > I'm pretty sure it the Apple OF implementation does. However I dont > remember to what extent it does from my playing around with OF on Apple HW.
Sounds like I'm going to have to preempt my kids on the olpc and see what OF does on it. :-) >> One reservation I have (which may disappear if the answer to the >> previous question is "yes"), it automatically and silently >> dereferences the /aliases/X node when asked to display /X or X (but >> only if /X doesn't exist in the dtb). This is not an obvious behavior >> since X isn't real. > > we could print out something about using an alias so the user knows that > its happening. > >> Should we have a different display syntax to force the dereference of >> an alias X? Assuming "*" is a good choice, this would change the >> behavior >> fdt print *ethernet0 >> to dereference /aliases/ethernet0 and print out >> /[EMAIL PROTECTED]/.../enet0 (or whatever). > > Lets says I have an alias for 'soc' to '[EMAIL PROTECTED]'. I want to be > able to in the future do print /soc/enet0 and have that work. > Introducing some new syntax would make that difficult and more ugly. > > - k Thinking out loud... we could define the syntax that a leading "*" indicates the first part of the path is a dereference of /aliases. Assuming /aliases/soc = /[EMAIL PROTECTED] /aliases/ethernet0 = /[EMAIL PROTECTED]/.../enet0 then print *soc/enet0 and print *ethernet0 would both work and print the right thing. You *would* have to know that the first element of the path is an /aliases dereference. Your original patch did not require that piece of knowledge (but silently and automagically, which makes me nervous). gvb ------------------------------------------------------------------------- Sponsored by: SourceForge.net Community Choice Awards: VOTE NOW! Studies have shown that voting for your favorite open source project, along with a healthy diet, reduces your potential for chronic lameness and boredom. Vote Now at http://www.sourceforge.net/community/cca08 _______________________________________________ U-Boot-Users mailing list U-Boot-Users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/u-boot-users
