Based on kernel version 6.11
. Page generated on 2024-09-24 08:21 EST
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | ============================== Linux I2C slave EEPROM backend ============================== by Wolfram Sang <wsa@sang-engineering.com> in 2014-20 This backend simulates an EEPROM on the connected I2C bus. Its memory contents can be accessed from userspace via this file located in sysfs:: /sys/bus/i2c/devices/<device-directory>/slave-eeprom The following types are available: 24c02, 24c32, 24c64, and 24c512. Read-only variants are also supported. The name needed for instantiating has the form 'slave-<type>[ro]'. Examples follow: 24c02, read/write, address 0x64: # echo slave-24c02 0x1064 > /sys/bus/i2c/devices/i2c-1/new_device 24c512, read-only, address 0x42: # echo slave-24c512ro 0x1042 > /sys/bus/i2c/devices/i2c-1/new_device You can also preload data during boot if a device-property named 'firmware-name' contains a valid filename (DT or ACPI only). As of 2015, Linux doesn't support poll on binary sysfs files, so there is no notification when another master changed the content. |