SPI interface to unsupported flash device.SPI interface to supported flash device.I2C interface to supported flash device.In order from simplest to hardest to implement thus: Even rarer and also more complicated, is using a custom PL interface to read the device, also requiring a custom solution. Sometimes, this device uses a non-standard interface that is accessed using a custom interface, and this would make it more complicated for U-Boot to read it, requiring custom code. In general, the MAC address will be stored in an on-board flash device, using a digital interface such as SPI or I2C accessible to the embedded processor.

We’ll look at storing the MAC address in a flash device. These addresses are generally assigned at production time and saved to a ROM device or to a non-volatile memory device such as flash that is read at boot time. The media access control address MAC address is a unique identifier composed of six octets that network devices use to identify themselves on a network. In this post, we’ll analyze the different approaches and point to solutions how to implement them. There’s several ways for U-Boot to store the Ethernet MAC address in non-volatile memory set at production time.

Linux get mac address script