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2 Linux I2C slave EEPROM backend !! 2 Linux I2C slave eeprom backend
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4 4
5 by Wolfram Sang <wsa@sang-engineering.com> in 2 !! 5 by Wolfram Sang <wsa@sang-engineering.com> in 2014-15
6 6
7 This backend simulates an EEPROM on the connec !! 7 This is a proof-of-concept backend which acts like an EEPROM on the connected
8 can be accessed from userspace via this file l !! 8 I2C bus. The memory contents can be modified from userspace via this file
>> 9 located in sysfs::
9 10
10 /sys/bus/i2c/devices/<device-directory 11 /sys/bus/i2c/devices/<device-directory>/slave-eeprom
11 <<
12 The following types are available: 24c02, 24c3 <<
13 variants are also supported. The name needed f <<
14 'slave-<type>[ro]'. Examples follow: <<
15 <<
16 24c02, read/write, address 0x64: <<
17 # echo slave-24c02 0x1064 > /sys/bus/i2c/dev <<
18 <<
19 24c512, read-only, address 0x42: <<
20 # echo slave-24c512ro 0x1042 > /sys/bus/i2c/ <<
21 <<
22 You can also preload data during boot if a dev <<
23 'firmware-name' contains a valid filename (DT <<
24 12
25 As of 2015, Linux doesn't support poll on bina 13 As of 2015, Linux doesn't support poll on binary sysfs files, so there is no
26 notification when another master changed the c 14 notification when another master changed the content.
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