On 8/1/06, Drasko Draskovic <drasko.draskovic at gmail.com> wrote:
>
>
> Hi. I am working on a custom design that is based on ARM926EJ and AMBA
> bus. OS of choice is uCLinux, patched with RTAI for RT performance. I
> have to implement now I2C support, but looking at the existing driver
> things seem a bit unclear for me.
>
> Here is what I unserstood:
> i2c-core.c is independent of the bus and is kernel module. This should
> be working. But what about AMBA bus? Is it supported? Is this file for
> support of AMBA located in 'busses' directory? What are algos files? As
> I undersand, these are bus dependent. Is AMBA supported by these?
>
> If there are not, does anyone have idea how these can be written?
>
> How can a proper working of I2C be tested? Can some dummy I2C
> peripheral be created in Linux?
>
> Any information will be more than helpful.
>
>
I also want to ask following things:
ARM has Amba Peripheral I2C Bus Controller (ApI2c), which I guess is a
bridge between Amba and I2C (which comes out of the chip on two pins).
So, can you tell me:
1) what abot 'buses' part? It has to be dependeant on Amba?
2) what about 'chips part? Does it have to depend on ApI2c?
3) Do I have to write only adapter part -- is this the peice of code
that is ApI2c dependant, and not 'chips' part?
I am still not clear which part of driver ('algos', 'busses', and
'chips') depends on what... And waht of existing I can use from existing and
what I
have to write by myself.
Cheers,
Drasko
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