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fdt: Show a runtime warning based on devicetree source

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When running, if the devicetree failed to come from the expected source,
show a warning, e.g:

   U-Boot ...

   DRAM:  128 MiB
   Core:  42 devices, 11 uclasses, devicetree: separate
   Warning: Unexpected devicetree source (not from a prior stage)
   Warning: U-Boot may not function properly
   Flash: 64 MiB
   ...

These warnings should only appear if the board config has been changed, or
the prior stage is broken.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2021-12-16 20:59:39 -07:00 committed by Tom Rini
parent b7d8e85b4c
commit 93233b07d0
1 changed files with 6 additions and 0 deletions
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6
common/board_r.c
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@ -598,6 +598,12 @@ static int dm_announce(void)
if (CONFIG_IS_ENABLED(OF_REAL))
printf(", devicetree: %s", fdtdec_get_srcname());
printf("\n");
if (IS_ENABLED(CONFIG_OF_HAS_PRIOR_STAGE) &&
(gd->fdt_src == FDTSRC_SEPARATE ||
gd->fdt_src == FDTSRC_EMBED)) {
printf("Warning: Unexpected devicetree source (not from a prior stage)");
printf("Warning: U-Boot may not function properly\n");
}
}
return 0;