From: David Daney <david.daney@xxxxxxxxxx> This is the first cut at hooking up my Octeon port to the irq_domain things. The Octeon specific patches are part of a larger set, and will need to be applied with that set, the first patch is stand-alone. The basic problem being solved taken from one of my other e-mails: Unfortunately, although a good idea, kernel/irq/irqdomain.c makes a bunch of assumptions that don't hold for Octeon. We may be able to improve it so that it flexible enough to suit us. Here are the problems I see: 1) It is assumed that there is some sort of linear correspondence between 'hwirq' and 'irq', and that the range of valid values is contiguous. 2) It is assumed that the concepts of nr_irq, irq_base and hwirq_base have easy to determine values and you can do iteration over their ranges by adding indexes to the bases. David Daney (2): irq/of/ARM: Enhance irq iteration capability of irq_domain code. MIPS: Octeon: Add irq_create_of_mapping() and GPIO interrupts. arch/arm/common/gic.c | 32 +++-- arch/mips/Kconfig | 1 + arch/mips/cavium-octeon/octeon-irq.c | 279 +++++++++++++++++++++++++++++++++- include/linux/irqdomain.h | 29 +++- kernel/irq/irqdomain.c | 97 +++++++++--- 5 files changed, 390 insertions(+), 48 deletions(-) -- 1.7.2.3
