Kernel driver rpi-poe-fan ===================== This driver enables the use of the Raspberry Pi PoE HAT fan. Author: Serge Schneider Description ----------- The driver implements a simple interface for driving the Raspberry Pi PoE (Power over Ethernet) HAT fan. The driver passes commands to the Raspberry Pi firmware through the mailbox property interface. The firmware then forwards the commands to the board over I2C on the ID_EEPROM pins. The driver exposes the fan to the user space through the hwmon sysfs interface.