Messages in this thread Patch in this message | | | From | Jean-Jacques Hiblot <> | Subject | [PATCH v3 1/2] of: irq: Added of_find_irq_domain() to get the domain of an irq | Date | Fri, 21 Mar 2014 15:46:24 +0100 |
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This functions does the same parsing as irq_of_parse_and_map but instead of doing the mapping, it returns a pointer to the irq domain
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@traphandler.com> --- drivers/of/irq.c | 20 ++++++++++++++++++++ include/linux/of_irq.h | 2 ++ 2 files changed, 22 insertions(+)
diff --git a/drivers/of/irq.c b/drivers/of/irq.c index 9bcf2cf..7d3184f 100644 --- a/drivers/of/irq.c +++ b/drivers/of/irq.c @@ -46,6 +46,26 @@ unsigned int irq_of_parse_and_map(struct device_node *dev, int index) EXPORT_SYMBOL_GPL(irq_of_parse_and_map); /** + * of_find_irq_domain - Parse the DT and returns a pointer to the irq domain + * @dev: Device node of the device whose interrupt is concerned + * @index: Index of the interrupt to get the domain for + * + * This function is a wrapper that chains of_irq_parse_one() and + * irq_find_host() to make things easier to callers + */ +struct irq_domain *of_find_irq_domain(struct device_node *dev, int index) +{ + int rc; + struct of_phandle_args oirq; + + rc = of_irq_parse_one(dev, index, &oirq); + if (rc) + return ERR_PTR(rc); + + return irq_find_host(oirq.np); +} + +/** * of_irq_find_parent - Given a device node, find its interrupt parent node * @child: pointer to device node * diff --git a/include/linux/of_irq.h b/include/linux/of_irq.h index 3f23b44..600ff0a 100644 --- a/include/linux/of_irq.h +++ b/include/linux/of_irq.h @@ -58,6 +58,8 @@ static inline int of_irq_count(struct device_node *dev) * so declare it here regardless of the CONFIG_OF_IRQ setting. */ extern unsigned int irq_of_parse_and_map(struct device_node *node, int index); +extern struct irq_domain *of_find_irq_domain(struct device_node *dev, + int index); extern struct device_node *of_irq_find_parent(struct device_node *child); #else /* !CONFIG_OF */ -- 1.9.0
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