X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=drivers%2Fof%2Firq.c;h=ca0189308d72025f61406d4440b20f7486fda99e;hb=274eb7bf1dce97dac496d7b9ded91f9de5719cf0;hp=9bcf2cf19357837dcb6dd8e5cce637150a7a32d0;hpb=878a876b2e10888afe53766dcca33f723ae20edc;p=karo-tx-linux.git

diff --git a/drivers/of/irq.c b/drivers/of/irq.c
index 9bcf2cf19357..ca0189308d72 100644
--- a/drivers/of/irq.c
+++ b/drivers/of/irq.c
@@ -379,6 +379,32 @@ int of_irq_to_resource(struct device_node *dev, int index, struct resource *r)
 }
 EXPORT_SYMBOL_GPL(of_irq_to_resource);
 
+/**
+ * of_irq_get - Decode a node's IRQ and return it as a Linux irq number
+ * @dev: pointer to device tree node
+ * @index: zero-based index of the irq
+ *
+ * Returns Linux irq number on success, or -EPROBE_DEFER if the irq domain
+ * is not yet created.
+ *
+ */
+int of_irq_get(struct device_node *dev, int index)
+{
+	int rc;
+	struct of_phandle_args oirq;
+	struct irq_domain *domain;
+
+	rc = of_irq_parse_one(dev, index, &oirq);
+	if (rc)
+		return rc;
+
+	domain = irq_find_host(oirq.np);
+	if (!domain)
+		return -EPROBE_DEFER;
+
+	return irq_create_of_mapping(&oirq);
+}
+
 /**
  * of_irq_count - Count the number of IRQs a node uses
  * @dev: pointer to device tree node