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

[Matthias Brugger]

On 4/30/25 19:15, Jan Čermák wrote:
> 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 at sairon.cz>

Reviewed-by: Matthias Brugger <mbrugger at suse.com>

> ---
> 
>   configs/rpi_arm64_defconfig | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/configs/rpi_arm64_defconfig b/configs/rpi_arm64_defconfig
> index 9fe5d177943..69e8e72c5d7 100644
> --- a/configs/rpi_arm64_defconfig
> +++ b/configs/rpi_arm64_defconfig
> @@ -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