[OE-core] [PATCH] kernel-fitimage: Allow DTB file relocation at boot time

[Alex Kiernan]

On Fri, Jun 15, 2018 at 5:19 PM Mihai Serban <mihai.serban at gmail.com> wrote:
>
> Use UBOOT_DTB_LOADADDRESS and UBOOT_DTB_ENTRYPOINT variables to instruct
> U-Boot where to place the selected DTB file when booting the system.
> Without these settings U-Boot uses the relative offset where DTB resides
> inside the loading address of the FIT image.
>
> Signed-off-by: Mihai Serban <mihai.serban at gmail.com>

I've a similar patch I've been sitting on for a while, which also
deals with the case where you want DTB overlays, but I don't have the
entry line - what's the use for that in a DTB inside a FIT image?

I'll get what I've got posted up.

> ---
>  meta/classes/kernel-fitimage.bbclass | 11 +++++++++++
>  1 file changed, 11 insertions(+)
>
> diff --git a/meta/classes/kernel-fitimage.bbclass b/meta/classes/kernel-fitimage.bbclass
> index 50a91e199069..981d11f19f8d 100644
> --- a/meta/classes/kernel-fitimage.bbclass
> +++ b/meta/classes/kernel-fitimage.bbclass
> @@ -134,6 +134,15 @@ EOF
>  fitimage_emit_section_dtb() {
>
>         dtb_csum="sha1"
> +       dtb_loadline=""
> +       dtb_entryline=""
> +
> +       if [ -n "${UBOOT_DTB_LOADADDRESS}" ]; then
> +               dtb_loadline="load = <${UBOOT_DTB_LOADADDRESS}>;"
> +       fi
> +       if [ -n "${UBOOT_DTB_ENTRYPOINT}" ]; then
> +               dtb_entryline="entry = <${UBOOT_DTB_ENTRYPOINT}>;"
> +       fi
>
>         cat << EOF >> ${1}
>                  fdt@${2} {
> @@ -142,6 +151,8 @@ fitimage_emit_section_dtb() {
>                          type = "flat_dt";
>                          arch = "${UBOOT_ARCH}";
>                          compression = "none";
> +                        ${dtb_loadline}
> +                        ${dtb_entryline}
>                          hash at 1 {
>                                  algo = "${dtb_csum}";
>                          };
> --
> 2.17.1
>
> --
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-- 
Alex Kiernan