On Thu, Nov 13, 2014 at 07:08:59PM +0100, Hans de Goede wrote:
Hi all,
So as you know I've been working on getting mainline u-boot to boot the older android derived linux-sunxi kernels, as some people need features not yet in mainline, and I would like there to be only one u-boot for both.
I had this working a while ago, but recently it broke, this is caused by config_distro_defaults.h setting CONFIG_OF_LIBFDT, if I undef that after including config_distro_defaults.h things work again.
I do not know if CONFIG_OF_LIBFDT is a recent addition to config_distro_defaults.h, or if something else broke things. But if I do not undef it, boot fails with:
sun7i# bootm start 0x48000000 ## Booting kernel from Legacy Image at 48000000 ... Image Name: Linux-3.4.75.sun7i+ Image Type: ARM Linux Kernel Image (uncompressed) Data Size: 3966672 Bytes = 3.8 MiB Load Address: 40008000 Entry Point: 40008000 Verifying Checksum ... OK Could not find a valid device tree
My hunch is that we've got more fall-out from Simon's re-org of the bootm code ages ago. It should be valid to try and boot a kernel without a device tree and other parts of the code base (for example arch/arm/lib/bootm.c) still do a FDT-or-ATAGS dance for example.