Dear Stephen Warren, In message <4f6a01d3.3020...@wwwdotorg.org> you wrote: > > > It appears that all you are trying here is an annoying, but somewhat > > unlikely error situation. As marked above (see *), it might make > > sense to think of alternative ways to find out what the console port > > might be. One possibility to do this is to use the environment. > > You need access to the environment anyway to initialize the console > > port (for reading the "baudrate" setting). So why not encoding the > > console UART port for example as part of a "hwconfig" setting? This > > setting could be auto-initialized when you load a DT on this board > > (eventually after verifying that it works). ... > I'd prefer to just have a different U-Boot (build) config for each HW > configuration, and define the console UART as part of that configuration > using the existing defines that are for that purpose.
This is another option - at the cost of maintaining separate binary images. > If we put the UART ID into the environment, then we either need to: > > a) Have a different U-Boot configuration anyway, in order to define the > different environment during the U-Boot build process. > > b) Post-process the U-Boot binary after building it, in order to modify > the environment that's contained in that binary. Not true. In the normal course of events, the board would boot with a working device tree provided, which provides correct console information. This could be used to auto-initialize the correct environment settings. You just have to make sure that board boots a single time with a working DT image - I don't know how production tests and/or software commissioning on these boards is organized, but this seems to be a possible route to me. [Been there, done that before. About 12 years before, IIRC.] You probably also need to program MAC addresses etc. ? 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: w...@denx.de "Pardon me for breathing, which I never do anyway so I don't know why I bother to say it, oh God, I'm so depressed. Here's another of those self-satisfied doors. Life! Don't talk to me about life." - Marvin the Paranoid Android _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot