[PATCH 0/5] Use device tree to get DRAM for sama5d27_som1_ek/sama5d2_xplained

Clément Léger
2021-08-02T12:50:49Z

Loading U-Boot after OP-TEE requires to move the base address of the
DRAM and reduce its size. Indeed, OP-TEE will be loaded at start of
DRAM for these platforms and this DRAM will be secured and thus not
accessible to U-Boot.

Currently, addresses are hardcoded in board configs. This series adds
memory property when missing to existing device tree and modify init
code to fetch DRAM size from devicetree. This will allow to modify only
the device tree to reduce DRAM when needed.

Memory addresses have been chosen to have a 32Mb hole at the start of
DRAM which allows to put OP-TEE and necessary exchange memory zones.

Clément Léger (5):
board: sama5d27_som1_ek: Get dram size and base from device tree
board: sama5d27_som1_ek: Modify load addresses
ARM: dts: at91: sama5d2: Add memory node in devicetree
board: sama5d2_xplained: Get dram size and base from device tree
board: sama5d2_xplained: Modify load addresses

arch/arm/dts/sama5d2.dtsi | 4 ++++
.../atmel/sama5d27_som1_ek/sama5d27_som1_ek.c | 12 ++++++----
.../atmel/sama5d2_xplained/sama5d2_xplained.c | 11 +++++----
include/configs/sama5d27_som1_ek.h | 12 ++++------
include/configs/sama5d2_xplained.h | 24 ++++++++-----------
5 files changed, 33 insertions(+), 30 deletions(-)

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2.32.0