i2c access from kernel

i2c access from kernel

[Ran Shalit]

Hello,

In userspace we can access any bus very simple, but from kernel it
seems very complex doing simple access to a bus.
The first argument to i2c_transfer is pointer to struct i2c_adapter,
which is very complex struct to fill !!

Isn't there a simpler way to access a bus (for example i2c-2) from kernel?

If I know, for example, the exact bus number, is there some way I can
get the i2c_adapter pointer to that bus ?

Thanks, Ran

Re: i2c access from kernel

[Wolfram Sang]

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Hi,

> The first argument to i2c_transfer is pointer to struct i2c_adapter,
> which is very complex struct to fill !!

You should never fill it yourself. This is the job of the i2c-core.

> If I know, for example, the exact bus number, is there some way I can
> get the i2c_adapter pointer to that bus ?

i2c_get_adapter(bus_number);

Regards,

   Wolfram


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