Hap ac2 only 128MB RAM

Hello,
i have a hap ac2 with 256mb ram(when it was on routeros, showed 256mb ram).
On openwrt only 128mb
[ 0.000000] Memory: 116340K/131072K available

How can i make the openwrt show the full256mb ram ?

According to https://mikrotik.com/product/hap_ac2#fndtn-specifications it has 128 MB of RAM, or did you add more memory yourself? Check /proc/meminfo for full details.

Hello,
As you can see
https://openwrt.org/toh/mikrotik/hap_ac2

Early revisions seemed to ship with 256 MiB of RAM (see wikidevi). However, revisions available in 2019 only ship with 128 MiB of RAM.

I have an early revision of the device

Ah, I see, then I'm pretty sure you would need to change https://github.com/openwrt/openwrt/blob/main/target/linux/ipq40xx/files-6.6/arch/arm/boot/dts/qcom/qcom-ipq4018-hap-ac2.dts#L16 to reg = <0x80000000 0x10000000>; and compile it from source since this early variant isn't part of the build system.

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