Hi Group -
I am working with the imx.51 on the Freescale EVK. Up to this point, have been working with the version of U-Boot (and Kernel) from the Freescale web site; the SDK which is LTIB based. Pretty stale stuff; U-Boot is rather old (8/2009), as with Kernel (2.6.31).
I pulled U-Boot before Christmas, got this version:
[tbesemer@t4linux1 u-boot]$ git describe v2010.12-82-gcdc51c2
Main interest being the IPU code, so I can do a Splash Screen. Compiles fine, boots fine on EVK, but I can't get it to boot my old Kernel; I put my own command line stuff in place, which is pulling kernel from a known offset in SD card:
mmc read 0 ${loadaddr} 0x800 0x1800;bootm
Kernel loads, but hangs on start (shows that U-Boot found it, parsed header). Passes CRC. Have not looked into issue further. My Kernel command line all the same; what I did was take the default boot parameters from existing U-Boot and put them into current U-Boot, re-compile. ${loadaddr} same from before, same as what is in current U-Boot.
A couple of comments/questions:
- Is above version of U-Boot known to work on EVK? It appears that this version supports DOS partitions on SD card, and default command line is to load from those. But, I can't find any documentation on how to partition the SD card to try this. Help on how to set up the SD card appreciated.
- Should above "raw" load from SD work? Probably my preference, but have an open mind. My Root FS is on two partitions that U-Boot does not need to know about; one is primary/recovery, one is working copy on release.
- The Freescale supplied SDK applies over 100 patches to the 8/09 release of U-Boot; wondering how many made it into current version of U-Boot, and how much I should care.
- I pulled the 2.6.37 Kernel from kernel.org to maybe try that with current U-Boot, but it doesn't seem to have IPU support, so not viable on my end. Might be willing to pull IPU code into Kernel from 2.6.31->2.6.37 to get it current, but outside scope of this mailing list.
End game:
- Get the Splash Screen working on imx.51 EVK. I will provide patch set back to mailing list once I do. I will derive from vision2 board.
- Get it to boot old 2.6.31 SDK supplied Kernel (which also has a bunch of Freescale patches that don't seem to have made it into kernel.org).
Any help on this appreciated; I will be more than happy to provide patch set work for anything I do for EVK back to this list for evaluation and incorporation.
Thanks,
tom