From: Hugo Villeneuve hvilleneuve@dimonoff.com For SOM with the EC configuration, the ethernet PHY is located on the SOM itself, and connected to the CPU ethernet controller. It has a reset line controlled via GPIO1_IO9. In this configuration, the PHY located on the carrier board is not connected to anything and is therefore not used. For SOM without EC configuration, the ethernet PHY on the carrier board is connected to the CPU ethernet controller. It has a reset line controlled via the GPIO expander PCA9534_IO5. The hardware configuration (EC) is determined at runtime by reading from the SOM EEPROM. To support both hardware configurations (EC and non-EC), adjust/fix the PHY reset gpios according to the hardware configuration read at runtime from the SOM EEPROM. This adjustement is done in U-Boot (OF_BOARD_FIXUP) and kernel (OF_BOARD_SETUP) device trees. Signed-off-by: Hugo Villeneuve hvilleneuve@dimonoff.com
Applied to u-boot-imx, master, thanks !
Best regards, Stefano Babic