SPI INT line

SPI INT line

[Nicholas Hickman]

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We are developing a system around the mpc8270.  On this system we are
using an ISDN controller connected to the SPI interface of the 8270.
For the INT line coming from the controller, should this be connected to
one of the IRQ lines that we typically use for PCI bus, or should we
connect it to one of the GPIO Group C pins?  Currently we have it to
IRQ4, but I am worried that this is incorrect.
 
 
Thanks in advance.


Nicholas Hickman


 

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Re: SPI INT line

[Clemens Koller]

Nicholas Hickman schrieb:
> We are developing a system around the mpc8270.  On this system we are
> using an ISDN controller connected to the SPI interface of the 8270.
> For the INT line coming from the controller, should this be connected to
> one of the IRQ lines that we typically use for PCI bus, or should we
> connect it to one of the GPIO Group C pins?  Currently we have it to
> IRQ4, but I am worried that this is incorrect.

I would use an otherwise unused (even in reference 82xx platforms)
IRQ line and have a look into the kernel and see which
IRQs are free so minimize/eliminate extra patches.

Regards,
-- 
Clemens Koller
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