[PATCH 1/2] boot: Fix dtbo application by ensuring overlay alignment

[Tom Rini]

On Tue, Jan 20, 2026 at 03:33:12PM +0000, Jamie Gibbons wrote:

> After U-Boot's DTC/libfdt update, device tree overlay application could
> fail with FDT_ERR_ALIGNMENT due to the overlay DTBO being loaded at a
> misaligned address. Change the FIT image loader option in image-fit.c
> from FIT_LOAD_IGNORED to FIT_LOAD_OPTIONAL_NON_ZERO, to ensure overlays
> are loaded at properly aligned addresses and any alignment errors are
> resolved.
> 
> Tested on: PolarFire SoC Icicle Kit
> 
> Fixes: 0535e46d55d ("scripts/dtc: Update to upstream version v1.7.2-35-g52f07dcca47c")
> Signed-off-by: Jamie Gibbons <jamie.gibbons at microchip.com>
> ---
>  boot/image-fit.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/boot/image-fit.c b/boot/image-fit.c
> index 2d040e38d97..3a327d07784 100644
> --- a/boot/image-fit.c
> +++ b/boot/image-fit.c
> @@ -2481,7 +2481,7 @@ int boot_get_fdt_fit(struct bootm_headers *images, ulong addr,
>  			addr, &uname, &uconfig,
>  			arch, IH_TYPE_FLATDT,
>  			BOOTSTAGE_ID_FIT_FDT_START,
> -			FIT_LOAD_IGNORED, &ovload, &ovlen);
> +			FIT_LOAD_OPTIONAL_NON_ZERO, &ovload, &ovlen);
>  		if (ov_noffset < 0) {
>  			printf("load of %s failed\n", uname);
>  			continue;

After talking with Marek about this more, we think this is the wrong
approach. Can you please try dropping the load_op test from 8fbcc0e0e839
and seeing if that also fixes your problem? If so, please post a patch
with that and a Fixes tag, thanks!

-- 
Tom
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