inter-driver communication

inter-driver communication

[Khai Trinh]

Hi folks,

Are there ways in the linux kernel that allows
driver-driver communications (ie: one driver
interrupts another driver in an embedded application)?

I have a driver that handles one device. When it is
interrupted, I would like then to interrupt the other
driver to handle the interrupt request?

Any suggestion is welcome and appreciated.

Thanks,
--Khai

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Re: inter-driver communication

[Neil Horman]

I'm not sure if an interrupt is exactly what you want here.  If you want to
facilitate communication between drivers I think that tasklets do the job fairly
well.  All you really need to do is have the destination driver export a
tasklet_struct that the source driver can reference as an external variable.
Then if you want the source driver to signal the destination driver to do
something, all it needs to do is call schedule_tasklet on the exported structure.
Hope that helps
Neil

Khai Trinh wrote:

> Hi folks,
>
> Are there ways in the linux kernel that allows
> driver-driver communications (ie: one driver
> interrupts another driver in an embedded application)?
>
> I have a driver that handles one device. When it is
> interrupted, I would like then to interrupt the other
> driver to handle the interrupt request?
>
> Any suggestion is welcome and appreciated.
>
> Thanks,
> --Khai
>
>
>


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