[POWERPC] pasemi: Implement NMI support

Some PWRficient-based boards have a NMI button that's wired up to a GPIO
as interrupt source. By configuring the openpic accordingly, these get
delivered as a machine check with high priority, instead of as an external
interrupt.

The device tree contains a property "nmi-source" in the openpic node
for these systems, and it's the (hwirq) source for the input.

Also, for these interrupts, the IACK is read from another register than
the regular (MCACK instead), but they are EOI'd as usual. So implement
said function for the mpic driver.

Finally, move a couple of external function defines to include/ instead
of local under sysdev. Being able to mask/unmask and eoi directly saves
us from setting up a dummy irq handler that will never be called.

Signed-off-by: Olof Johansson <olof@lixom.net>

1 files changed, 0 insertions, 3 deletions

diff --git a/arch/powerpc/sysdev/mpic.h b/arch/powerpc/sysdev/mpic.h
index 4783c6e..fbf8a26 100644
--- a/arch/powerpc/sysdev/mpic.h
+++ b/arch/powerpc/sysdev/mpic.h
@@ -38,9 +38,6 @@ static inline int mpic_pasemi_msi_init(struct mpic *mpic)
 
 extern int mpic_set_irq_type(unsigned int virq, unsigned int flow_type);
 extern void mpic_set_vector(unsigned int virq, unsigned int vector);
-extern void mpic_end_irq(unsigned int irq);
-extern void mpic_mask_irq(unsigned int irq);
-extern void mpic_unmask_irq(unsigned int irq);
 extern void mpic_set_affinity(unsigned int irq, cpumask_t cpumask);
 
 #endif /* _POWERPC_SYSDEV_MPIC_H */