Linux/PROCESSOR-SDK-AM437X: EEPROM write

Hi,

What is this EEPROM?

The part number we are using for EEPROM device is "CAT24C256WI-GT3". The datasheet for this device is saying that we can do read/write operation on it. There is write protected pin on it but we are disabling that pin.
you can get datasheet from the following link:
www.onsemi.com/.../CAT24C256-D.PDF

This EEPROM contains board ID, revision no, configuration etc. information about the board. I need to change that from the driver.

We have some diagnostic test for testing hardware on ti-am437x-gp-evm, its like bare metal code without any file system and from there we can write the EEPROM.

I want to do it from linux kernel.

Hi thanks for the reply. But those commands are not working. when i am invoking those commands the error is:

U-Boot# i2c md 0x50 0.2 0x10
i2c_read: error waiting for addr ACK (status=0x116)
Error reading the chip: 1

then i invoked the "i2c probe " command there i didn't get my eeprom chip address 0x50 listed.

U-Boot# i2c probe
Valid chip addresses: 00 1B 3B 3F 5C 62 65
U-Boot#

Any idea how can I add the 0x50 chip address there. From muc.c file we have enabled both i2c devices and while booting we are also reading the epprom header

information but in "i2c probe" the eeprom device address is not listed. EEPROM is connected to i2c0 at address 0x50.

Can you post the output of i2c bus command?

Here is the output of i2c bus command:

U-Boot# i2c bus
Bus 0: omap24_0
Bus 1: omap24_1
Bus 2: omap24_2
U-Boot#


Thanks.