Blocking wait for interrupt

[Sebastian Sumpf]

On 07/26/2017 10:47 AM, Johannes Kliemann wrote:
> Hi Sebastian,
> 
> thanks for your answer.
> 
> I tried to implement the relevant parts with Lx::Tasks. It seems to me
> that those Tasks are designed to run some kind of endless control flow.
> Beside this, I wasn't able to get an interrupt while blocking inside the
> task.Yet I'm not sure if I used the tasks correctly.
> 
> Maybe I should try to explain how the driver is intended to work.
> It consists of two parts, a touch driver that is written natively for
> Genode and uses I2C to communicate with its controller. And a I2C driver
> for the controller that I try to port from Linux
> (drivers/i2c/busses/i2c-designware-core.(c|h)).
> The send method of the Linux driver is implemented as I described it in
> my first mail.
> This behaviour is only triggered if the send method is called and
> returns after the message is sent or the controller timed out. The
> return causes an unexpected return error in the task.
> Beside that the interrupt never occurs while the task is inside the
> Linux code.
> 
> I'm not sure what I miss or how the Lx::Task should be used exactly in
> this case.
> 

Can you please provide the name of the method and maybe the line of code
where the i2c driver waits for the interrupt? This way I would be able
to have a look.

Thanks,

Sebastian



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Sebastian Sumpf
Genode Labs

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