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 <[email protected]> --- 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 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
