Kumar Gala wrote: > > On Jul 9, 2008, at 12:02 PM, Jerry Van Baren wrote: > >> >> 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). > > did we come to resolution on this? I'd like to see this in 1.3.5. > > - k
Hi Kumar, I think we have basic resolution - I would like to see it in 1.3.5 too. I haven't pushed on this, waiting for 1.3.5 window to open (or some free time, whichever comes last). I've CC:ed David Gibson in case he has some advice - the concept is to indicate a dereference of /aliases nodes so that us lazy engineers don't have to cut'n'paste the whole long path from the alias. Kumar originally proposed to do it automagically and I countered proposing using "*" to indicate the next path name should be looked up in /aliases and the result used instead (i.e. dereferenced). Discussion thread: <http://thread.gmane.org/gmane.comp.boot-loaders.u-boot/43575/focus=44941> Looking at the ieee1275 doc <http://playground.sun.com/pub/1275/coredoc/1275-1994/1275.ps.gz> it looks like "*" will work for a dereference delimiter as it is not listed as one of the permitted punctuation characters in a node name. Quoting 3.2.1.1 Node names: ---------------------------------------------------------------------- The driver name field is a sequence of between one and 31 letters, digits, and punctuation characters from the set ", . _ + - ". Uppercase and lowercase characters are distinct. ---------------------------------------------------------------------- We do have a problem with property names, where "*" _is_ a legal name component. Quoting 3.2.2.1.1 Property names: ---------------------------------------------------------------------- The property name is a human-readable text string consisting of one to thirty-one printable characters. Property names shall not contain uppercase characters or the characters "/", "\", ":", "[", "]" and "@". ---------------------------------------------------------------------- Note that "*" is not proscribed, making it a legal character in a property name. Having noted that, I'm willing to take the risk and use "*" for the "alias dereference" separator. Looking back at the original patch, Kumar's original patch only did the /aliases dereference for the "fdt print" command. I'm thinking more general purpose: being able to dereference /aliases in all "fdt" commands. This seems helpful for the "fdt set" command, for instance. Whether this is reasonable to implement remains to be seen... Best regards, gvb ------------------------------------------------------------------------- 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
