On Fri, Feb 19, 2010 at 10:50 AM, Wolfgang Denk wd@denx.de wrote:
Dear "Parks, Derek",
In message 821B2170E9E7F04FA38DF7EC21DE487119EF645A@VCAEXCH01.hq.corp.viasat.com you wrote:
I have an c++ application that needs to display various versions of system components; u-boot, kernel, O/S flavor, hardware and software versions. I'm struggling with getting the u-boot version and ask for your help. My ideal situation is to have U-boot report (somehow) to Linux it's version number and have Linux store it in environment variables. Any thoughts?
When CONFIG_VERSION_VARIABLE is set in your board config file, then U-Boot will set the "ver" envrionment variable to the current version ID string. If you run "saveenv" at least once, then you can read this string from the U-Boot environment under Linux, using the fw_getenv tool / function provided in tools/env/ .
It is possible also to pass U-Boot version to Linux by adding it to the "bootargs" as additional argument unrecognized by Linux. Afterwards, it can be retrieved from /proc/cmdline.
Regards, Michael