Scott Wood wrote:
That's the equivalent of saying Linux doesn't support something because nobody bothered to enable it in a certain defconfig.
Well, that's exactly what I meant. When you boot an upstream U-boot on a P1022DS, there is no support for NAND chips. The 'nand' command does not exist. You cannot build a u-boot.bin that will boot from NAND. That pretty much means "there is no NAND support".
However, I just tried the two SDK patches that add it, and they apply cleanly, so that's an easy fix.
Which patches are those?
powerpc/85xx: add SPI and SD builds for P1022DS powerpc/p1022ds: Add support for NAND and NAND bootI'm not sure what SPI and SD have to do with it...
The 2nd patch applies on top of the first.
Most of the latter patch is concerned with NAND boot, which is a different issue from NAND support, but still pretty important if you're going NAND-only. It looks like the patches were actually initially separate, but Kumar oh-so-helpfully squashed them together.
It's a good thing we don't do that any more.
One thing I would like to see fixed in at upstream version of p1022ds NAND boot support is for it to use SPD like a normal p1022ds boot. This will likely require reviving the three-stage boot discussion (TPL).
I just posted those two patches for upstream. I don't want the TPL work to hold up these patches.