06-30-2015
Ultrix run on MIPS chips. Not Alpha chips
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LEARN ABOUT CENTOS
i2c-stub-from-dump
I2C-STUB-FROM-DUMP(8) System Manager's Manual I2C-STUB-FROM-DUMP(8)
NAME
i2c-stub-from-dump - feed i2c-stub with dump files
SYNOPSIS
i2c-stub-from-dump address[,address,...] dump-file [dump-file ...]
DESCRIPTION
i2c-stub-from-dump is a small helper script for the i2c-stub kernel driver. It lets you setup one or more fake I2C chips on the i2c-stub
bus based on dumps of the chips you want to emulate.
i2c-stub-from-dump requires i2cdetect and i2cset to be installed and reachable through the user's PATH. The former is used to find out the
i2c-stub bus number, while the latter is used to write to the fake I2C chips.
EXAMPLE
You have an I2C chip on system A. You would like to do some development on its driver on system B. Here are the few steps you have to fol-
low.
On system A, use i2cdump to capture a dump from the chip. Assuming that the chip in question lives at address 0x4c on I2C bus 0, you would
run:
i2cdump -y 0 0x4c b > chip.dump
Adjust the bus number and chip address for your case. i2cdetect can help you find out their values. If the device uses word (16-bit) regis-
ter access instead of the traditional byte (8-bit) access, use mode w instead of b.
Copy the dump file to system B.
On system B, run:
i2c-stub-from-dump 0x4c chip.dump
This will load the required i2c-dev and i2c-stub kernel drivers if needed, then write all the register values to the emulated I2C chip at
address 0x4c. Again, adjust the address as needed.
LIMITATIONS
There are some limitations to the kind of devices that can be handled:
o Device must not have banks (as most Winbond devices do).
SEE ALSO
i2cdump(8), i2cdetect(8), i2cset(8)
AUTHOR
Jean Delvare
March 2010 I2C-STUB-FROM-DUMP(8)