From 93233b07d08955dafdc8a7d2ef692d8b3facc439 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Thu, 16 Dec 2021 20:59:39 -0700 Subject: [PATCH] fdt: Show a runtime warning based on devicetree source 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 --- common/board_r.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/common/board_r.c b/common/board_r.c index 99adff14b3..6d520662db 100644 --- a/common/board_r.c +++ b/common/board_r.c @@ -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; -- 2.39.5