Hi,
currently there are three drivers for the Coldfire QSPI interface in
the test-release. All of them are broken in varying degrees, so I am
working to get at least one running smoothly. Mike Lavenders latest
Driver (spi_coldfire.c), which was also annouced in this list, seems
to be the best candidate for the job.
Today I managed to get it building, while not being able to test it
on real hardware because of time constraints. The Problems I found
and hope to have fixed are:
- Adapting it to the completely revamped workqueue API, I took some
HiSax driver and a LWN article as a reference
- The SA_INTERRUPT flag for request_irq seems to be gone, not being
able to find any reference what to pass here, I used 0 (zero) as an
interim value.
My questions are:
- What are suitable values for flags passed to request_irq, this
whole function seems to be platform dependant but I can't find any
implementation in arch/m68knommu
- There is a reason for irq not being initialized in
coldfire_spi_probe() ? Look for a line like
=========================
out_error_irq_alloc:
free_irq(irq, drv_data);
=========================
the compiler and me cannot see any initialization of irq in the whole
function. Maybe a bug, or just a dummy-variable?
Greg: Would you agree to remove the older, even more broken
mcf_qspi.c driver? (The other broken one is in character-devices menu
somewhere, I'm currently not on my delvelopment machine)
Greetings
Peter
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