[PATCH 05/32] of/irq: Create stub for of_irq_find_parent when !CONFIG_OF

Lee Jones lee.jones at linaro.org
Thu Sep 20 08:12:23 EDT 2012

of_irq_find_parent is a handy function to use outside the confines of
the Open Firmware subsystem. One such use-case is when the IRQ Domain
wishes to find an IRQ domain for a given device node. Currently it can
not take any notice of the 'interrupt-parent' property. Instead it
just uses the first IRQ controller as it climbs the Device Tree. If
we were to use this as a precursor the resultant controller is more
likely to be correct.

Acked-by: Rob Herring <rob.herring at calxeda.com>
Acked-by: Linus Walleij <linus.walleij at linaro.org>
Signed-off-by: Lee Jones <lee.jones at linaro.org>
 include/linux/of_irq.h |    5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/linux/of_irq.h b/include/linux/of_irq.h
index 1717cd9..b8e2411 100644
--- a/include/linux/of_irq.h
+++ b/include/linux/of_irq.h
@@ -83,6 +83,11 @@ static inline unsigned int irq_of_parse_and_map(struct device_node *dev,
 	return 0;
+static inline void *of_irq_find_parent(struct device_node *child)
+	return NULL;
 #endif /* !CONFIG_OF */
 #endif /* __OF_IRQ_H */

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