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Author SHA1 Message Date
Felix Fietkau
1839d1b912 cns3xxx: support isolated PCI interrupts on newer Laguna PCBs
The cns3xxx uses irq61 for pcie0_intr which in the case of a PCIe-to-PCI
bridge ends up combining INTA/B/C/D on a single ARM CPU interrupt. This is
not optimal when you have multiple cores. To overcome this limitation an
enhancement was made on newer Laguna PCB's that support miniPCI cards
to route the INTA/B/C/D signals to unique external ARM CPU interrupts which
can help balance CPU core utilization and in some cases increase overall
system performance or responsiveness.

For more details see:
 http://trac.gateworks.com/wiki/multicoreprocessing#PCIInterruptsteering

Signed-off-by: Tim Harvey <tharvey@gateworks.com>

SVN-Revision: 42400
2014-09-02 16:44:40 +00:00