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of/irq: Create stub for of_irq_find_parent when !CONFIG_OF 

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@calxeda.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Lee Jones 2012-08-08 13:44:59 +01:00
parent e8b9acd26b
commit 62861095dc
1 changed files with 5 additions and 0 deletions
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5
include/linux/of_irq.h
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@ -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 */