[RFC PATCH v2 06/12] MIPS: Octeon: Add a irq_create_of_mapping() implementation.
From: David Daney <hidden>
Date: 2011-03-04 19:44:27
Also in:
linux-mips, lkml
Subsystem:
mips, the rest · Maintainers:
Thomas Bogendoerfer, Linus Torvalds
This is needed for Octeon to use the Device Tree. Signed-off-by: David Daney <redacted> --- arch/mips/cavium-octeon/octeon-irq.c | 25 +++++++++++++++++++++++++ 1 files changed, 25 insertions(+), 0 deletions(-)
diff --git a/arch/mips/cavium-octeon/octeon-irq.c b/arch/mips/cavium-octeon/octeon-irq.c
index b365710..b0a9261 100644
--- a/arch/mips/cavium-octeon/octeon-irq.c
+++ b/arch/mips/cavium-octeon/octeon-irq.c@@ -8,7 +8,9 @@ #include <linux/interrupt.h> #include <linux/bitops.h> +#include <linux/module.h> #include <linux/percpu.h> +#include <linux/of_irq.h> #include <linux/irq.h> #include <linux/smp.h>
@@ -64,6 +66,29 @@ static void __init octeon_irq_set_ciu_mapping(int irq, int line, int bit, octeon_irq_ciu_to_irq[line][bit] = irq; } +/* + * irq_create_of_mapping - Hook to resolve OF irq specifier into a Linux irq# + * + * Octeon irq maps are a pair of indexes. The first selects either + * ciu0 or ciu1, the second is the bit within the ciu register. + */ +unsigned int irq_create_of_mapping(struct device_node *controller, + const u32 *intspec, unsigned int intsize) +{ + int ciu, bit; + unsigned int irq = 0; + + ciu = be32_to_cpup(intspec); + bit = be32_to_cpup(intspec + 1); + + if (ciu < 8 && bit < 64) + irq = octeon_irq_ciu_to_irq[ciu][bit]; + + return irq; +} +EXPORT_SYMBOL_GPL(irq_create_of_mapping); + + static int octeon_coreid_for_cpu(int cpu) { #ifdef CONFIG_SMP
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1.7.2.3