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-rw-r--r--drivers/of/irq.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/of/irq.c b/drivers/of/irq.c
index 5aeb89411350..3e06a699352d 100644
--- a/drivers/of/irq.c
+++ b/drivers/of/irq.c
@@ -406,6 +406,28 @@ int of_irq_get(struct device_node *dev, int index)
}
/**
+ * of_irq_get_byname - Decode a node's IRQ and return it as a Linux irq number
+ * @dev: pointer to device tree node
+ * @name: irq name
+ *
+ * Returns Linux irq number on success, or -EPROBE_DEFER if the irq domain
+ * is not yet created, or error code in case of any other failure.
+ */
+int of_irq_get_byname(struct device_node *dev, const char *name)
+{
+ int index;
+
+ if (unlikely(!name))
+ return -EINVAL;
+
+ index = of_property_match_string(dev, "interrupt-names", name);
+ if (index < 0)
+ return index;
+
+ return of_irq_get(dev, index);
+}
+
+/**
* of_irq_count - Count the number of IRQs a node uses
* @dev: pointer to device tree node
*/