how may I use the av7110 I2C bus for testing purposes?
I want to change some registers int the analog module ICs.
I have got their i2c addresses but do not know how to change them
from the command prompt. It is laboriously to change the kernel modules and reload them everytime.
Is there a way to write to them directly with a small program?
Unfortunately, not. The linuxtv.org drivers have their own internal i2c abstraction layer -- there is no way to access the i2c bus from userspace.
AFAIK the Metzlerbros. driver use the common linux i2c kernel interface structure. There, it should be possible to access the available i2c busses through the /dev/i2c/ interface provided by the "i2c-dev" driver.
thanks Tim Lapawa
Just in case you are wondering why the linuxtv.org drivers don't use the linux i2c kernel interface: I was told that the frontends often crashed when i2c helper drivers probed the av7110 bus to see, if a device was present there or not. This was simply not usable in production systems, so they decided to make an internal abstraction layer.
Please correct me if I'm wrong.
CU Michael.
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