Hi all! I'm a contributor of the OpenWrt project. There are some OEM vendors making routers with different ram/flash sizes while using the same model number. (example: [0]) To get them work we have to create different device tree for each ram sizes, and since users may not be aware of the actual memory size on their devices, they'll brick it if incorrect firmware was used. To save some effort from this kind of work, I implemented memory auto-detection for Mediatek MT7621 [1] and deleted all existing memory nodes in device trees for OpenWrt ramips target [2]. After some discussions I'm not sure if the latter commit is a proper one so I bring these questions here: 1. If kernel can precisely probe memory size of the target device, should we still keep memory nodes in device tree when memory size varies on a single device model? 2. should we keep memory node for devices that doesn't have different memory sizes yet? (When it comes to routers, vendors are unlikely to guarantee how much memory they'll use.) 3. If we should keep it, should we enforce kernel to use memory info in device tree when it presents or just ignore the one in dts and let kernel detect it? Regards, Chuanhong Guo [0] https://github.com/openwrt/openwrt/pull/1930 [1] http://git.openwrt.org/6d91ddf5175d2eac3c4bc4a404cc0f5dd44cf25b [2] https://git.openwrt.org/a2c19f1d2f658367e6d62a6bdcfc72f12f23e43e
