CONFIG_AT24: EEPROMs from most vendors

General informations

The Linux kernel configuration item CONFIG_AT24:

• prompt: EEPROMs from most vendors
• type: tristate
• depends on: CONFIG_SYSFS && CONFIG_EXPERIMENTAL
• defined in drivers/i2c/chips/Kconfig
• found in Linux kernels: 2.6.27–2.6.28
• modules built: at24

Help text

Enable this driver to get read/write support to most I2C EEPROMs, after you configure the driver to know about each EEPROM on your target board. Use these generic chip names, instead of vendor-specific ones like at24c64 or 24lc02:

24c00, 24c01, 24c02, spd (readonly 24c02), 24c04, 24c08, 24c16, 24c32, 24c64, 24c128, 24c256, 24c512, 24c1024

Unless you like data loss puzzles, always be sure that any chip you configure as a 24c32 (32 kbit) or larger is NOT really a 24c16 (16 kbit) or smaller, and vice versa. Marking the chip as read-only won't help recover from this. Also, if your chip has any software write-protect mechanism you may want to review the code to make sure this driver won't turn it on by accident.

If you use this with an SMBus adapter instead of an I2C adapter, full functionality is not available. Only smaller devices are supported (24c16 and below, max 4 kByte).

This driver can also be built as a module. If so, the module will be called at24.

Hardware

LKDDb

Raw data from LKDDb:

• lkddb i2c "24c00" : CONFIG_AT24 : drivers/i2c/chips/at24.c # in 2.6.27–2.6.28
• lkddb i2c "24c01" : CONFIG_AT24 : drivers/i2c/chips/at24.c # in 2.6.27–2.6.28
• lkddb i2c "24c02" : CONFIG_AT24 : drivers/i2c/chips/at24.c # in 2.6.27–2.6.28
• lkddb i2c "24c04" : CONFIG_AT24 : drivers/i2c/chips/at24.c # in 2.6.27–2.6.28
• lkddb i2c "24c08" : CONFIG_AT24 : drivers/i2c/chips/at24.c # in 2.6.27–2.6.28
• lkddb i2c "24c1024" : CONFIG_AT24 : drivers/i2c/chips/at24.c # in 2.6.27–2.6.28
• lkddb i2c "24c128" : CONFIG_AT24 : drivers/i2c/chips/at24.c # in 2.6.27–2.6.28
• lkddb i2c "24c16" : CONFIG_AT24 : drivers/i2c/chips/at24.c # in 2.6.27–2.6.28
• lkddb i2c "24c256" : CONFIG_AT24 : drivers/i2c/chips/at24.c # in 2.6.27–2.6.28
• lkddb i2c "24c32" : CONFIG_AT24 : drivers/i2c/chips/at24.c # in 2.6.27–2.6.28
• lkddb i2c "24c512" : CONFIG_AT24 : drivers/i2c/chips/at24.c # in 2.6.27–2.6.28
• lkddb i2c "24c64" : CONFIG_AT24 : drivers/i2c/chips/at24.c # in 2.6.27–2.6.28
• lkddb i2c "at24" : CONFIG_AT24 : drivers/i2c/chips/at24.c # in 2.6.27–2.6.28
• lkddb i2c "spd" : CONFIG_AT24 : drivers/i2c/chips/at24.c # in 2.6.27–2.6.28
• lkddb module at24 CONFIG_AT24 : drivers/i2c/chips/Kconfig : "EEPROMs from most vendors" # in 2.6.27–2.6.28

Sources

This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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