@@ -13,6 +13,7 @@
#include <linux/string.h>
#include <linux/platform_device.h>
#include <linux/of_device.h>
+#include <linux/of_irq.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/dma-mapping.h>
@@ -87,7 +88,11 @@ int platform_get_irq(struct platform_device *dev, unsigned int num)
return -ENXIO;
return dev->archdata.irqs[num];
#else
- struct resource *r = platform_get_resource(dev, IORESOURCE_IRQ, num);
+ struct resource *r;
+ if (IS_ENABLED(CONFIG_OF_IRQ) && dev->dev.of_node)
+ return of_irq_get(dev->dev.of_node, num);
+
+ r = platform_get_resource(dev, IORESOURCE_IRQ, num);
return r ? r->start : -ENXIO;
#endif
@@ -377,6 +377,32 @@ 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
*/
@@ -168,7 +168,9 @@ struct platform_device *of_device_alloc(struct device_node *np,
rc = of_address_to_resource(np, i, res);
WARN_ON(rc);
}
- WARN_ON(of_irq_to_resource_table(np, res, num_irq) != num_irq);
+ if (of_irq_to_resource_table(np, res, num_irq) != num_irq)
+ pr_debug("not all legacy IRQ resources mapped for %s\n",
+ np->name);
}
dev->dev.of_node = of_node_get(np);
@@ -44,11 +44,16 @@ extern void of_irq_init(const struct of_device_id *matches);
#ifdef CONFIG_OF_IRQ
extern int of_irq_count(struct device_node *dev);
+extern int of_irq_get(struct device_node *dev, int index);
#else
static inline int of_irq_count(struct device_node *dev)
{
return 0;
}
+static inline int of_irq_get(struct device_node *dev, int index)
+{
+ return 0;
+}
#endif
#if defined(CONFIG_OF)