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configs: rpi: set NR_DRAM_BANKS to 8 to accommodate RAM on 16GB models

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Raspberry Pi 5 can now have up to 16 GiB of RAM where the memory spans 8
DRAM banks in total. Increase the config value to 8 to initialize the
whole RAM. Without this change, kernel only sees 8 GiB of RAM on the 16
GiB CM5 as reported in [1].

[1] https://github.com/home-assistant/operating-system/issues/3989

Signed-off-by: Jan Čermák <sairon@sairon.cz>
Reviewed-by: Matthias Brugger <mbrugger@suse.com>
This commit is contained in:
Jan Čermák 2025-04-30 19:15:35 +02:00 committed by Peter Robinson
parent d7c449c3d8
commit 0cd85170cf
1 changed files with 1 additions and 0 deletions
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configs/rpi_arm64_defconfig
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@ -2,6 +2,7 @@ CONFIG_ARM=y
CONFIG_POSITION_INDEPENDENT=y
CONFIG_ARCH_BCM283X=y
CONFIG_TARGET_RPI_ARM64=y
CONFIG_NR_DRAM_BANKS=8
CONFIG_ENV_SIZE=0x4000
CONFIG_DEFAULT_DEVICE_TREE="bcm2711-rpi-4-b"
CONFIG_OF_LIBFDT_OVERLAY=y