OpenWrt accepts binary only firmware running outside of the Linux kernel address space on the wifi chip itself. This matches what upstream Linux also accepts. This works well with most recent Wifi drivers. OpenWrt does not accapt binary only kernel modules or binary only userspace applications, they are very hard to maintain if you do not have the source code.
This works well with Mediatek and also Qualcomm and most other vendors.
This works well with Mediatek and also Qualcomm and most other vendors.