1============================== 2Linux I2C slave EEPROM backend 3============================== 4 5by Wolfram Sang <wsa@sang-engineering.com> in 2014-20 6 7This backend simulates an EEPROM on the connected I2C bus. Its memory contents 8can be accessed from userspace via this file located in sysfs:: 9 10 /sys/bus/i2c/devices/<device-directory>/slave-eeprom 11 12The following types are available: 24c02, 24c32, 24c64, and 24c512. Read-only 13variants are also supported. The name needed for instantiating has the form 14'slave-<type>[ro]'. Examples follow: 15 1624c02, read/write, address 0x64: 17 # echo slave-24c02 0x1064 > /sys/bus/i2c/devices/i2c-1/new_device 18 1924c512, read-only, address 0x42: 20 # echo slave-24c512ro 0x1042 > /sys/bus/i2c/devices/i2c-1/new_device 21 22You can also preload data during boot if a device-property named 23'firmware-name' contains a valid filename (DT or ACPI only). 24 25As of 2015, Linux doesn't support poll on binary sysfs files, so there is no 26notification when another master changed the content. 27