commit 8a2e75e6a1ca51bbd81eef36ffb26737adec316f
author Patrick Delaunay <patrick.delaunay@foss.st.com> Wed Sep 17 14:31:30 2025 +0200
committer Patrice Chotard <patrice.chotard@foss.st.com> Tue Sep 30 17:37:10 2025 +0200
tree 18f08d6ddab97896ef99de9c3722922bf1e35284
parent d1afa6650434b1d6ebeba22a44c3e02a2e822798

stm32mp2: update register used by BL31 for boot parameter

Use the ARM64 kernel booting register settings, defined in Linux
documentation Documentation/arch/arm64/booting.rst:

 x0 = physical address of device tree blob (dtb) in system RAM.

so kernel can replace U-Boot in FIP without modification of BL31.

Use x0 for future TF-A version and keep x2 as fallback to be compatible
with previous version of TF-A BL31.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>