The ENC28J60 is a 10 Mbps half-duplex Ethernet controller interfaced via SPI. It achieves real-world bandwidth up to 5Mbit/s on devices like the RPi Zero due to SPI limits. Commonly used with Raspberry Pi Zero boards for wired network connectivity. Signed-off-by: Albrecht Lohofener <albrechtloh@gmx.de> Link: https://github.com/openwrt/openwrt/pull/19048 Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com> (cherry picked from commit 4987239913794811b8ac71ff141129e276565d6b)