Re: Need help to write I2C EEPROM device driver

On Wednesday 27 September 2006 16:11, Sachin Rane wrote:

To access EEPROM using /dev/i2c-<x>, which drivers I need to load?
 
Please confirm that I need to load following drivers:
1. i2c-core.ko (Core Driver)
2. i2c-ibm-iic.ko (Bus Driver)
3. i2c-dev.ko (Dev Interface driver)

That looks good.

Do I need to load 'eeprom.ko'?

No.

Because in one of the mail from the mailing list, it was mentioned that I 

should not load  ''eeprom.ko" to access the chip using 'dev' interface.
Either use access via /dev/i2c-x or via eeprom driver. I haven't used the 
later one so far. Using both at the same time is probably not possible.

Matthias

 
Thanks and Regards,
Sachin Rane

________________________________

From: Matthias Fuchs [mailto:matthias.fuchs@esd-electronics.com]
Sent: Wed 9/27/2006 6:21 AM
To: linuxppc-embedded@ozlabs.org
Cc: Sachin Rane
Subject: Re: Need help to write I2C EEPROM device driver



Hi Sachin,

there is already a driver for this part in the kernel
(drivers/i2c/chips/eeprom.c).

BTW: to do some simple reads and writes to an I2C EEPROM it is very simple 

to

access the EEPROM via read/write/ioctl through /dev/i2c-<x>. No driver - 

only

userland code.

Matthias


On Tuesday 26 September 2006 16:34, Sachin Rane wrote:

quoted

Hi,

I am looking for an information to write a device driver to access EEPROM 

IC

M24C02-WBN6.

quoted

The EEPROM IC M24C02-WBN is present on the 'ppc440' evaluation board for

boot strap purpose.