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4339e85794
Leaving no empty space in the FDT passed to the next booting stage
causes the following U-Boot crash on Ventana internal platforms:
Unhandled exception: Load access fault
EPC: 00000000fffa6372 RA: 00000000fffa7418 TVAL: 0001746174730068
EPC: 0000000080245372 RA: 0000000080246418 reloc adjusted
SP: 00000000fef38440 GP: 00000000fef40e60 TP: 0000000000000000
T0: 00000000fef40a70 T1: 000000000000ff00 T2: 0000000000000000
S0: 00000000fffc17a8 S1: 00000000fef38d40 A0: 7375746174730068
A1: 00000000fffc17a8 A2: 0000000000000010 A3: 0000000000000010
A4: 0000000000000000 A5: 00000000fffc17b8 A6: 0000000000ff0000
A7: 000000000000b100 S2: 0000000000000000 S3: 0000000000000001
S4: 00000000fef38d40 S5: 7375746174730068 S6: 0000000000000000
S7: 00000000fef4eef0 S8: 00000000fef4ef90 S9: 0000000000000000
S10: 0000000000000000 S11: 00000000fef4efc0 T3: 00000000fef40ea8
T4: 0000000000ff0000 T5: 00000000fef40a60 T6: 00000000fef40a6c
To address the above issue, keep some minimal empty space in the
FDT instead of no empty space.
Fixes: bbe9a23060 ("platform: generic: Pack the FDT after applying fixups")
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Link: https://lore.kernel.org/r/20251209053130.407935-1-apatel@ventanamicro.com
Signed-off-by: Anup Patel <anup@brainfault.org>