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-rw-r--r--drivers/base/platform.c20
-rw-r--r--include/linux/platform_device.h1
2 files changed, 21 insertions, 0 deletions
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 1dd6d3bf1098..73e399466c6e 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -117,6 +117,26 @@ int platform_get_irq(struct platform_device *dev, unsigned int num)
EXPORT_SYMBOL_GPL(platform_get_irq);
/**
+ * platform_irq_count - Count the number of IRQs a platform device uses
+ * @dev: platform device
+ *
+ * Return: Number of IRQs a platform device uses or EPROBE_DEFER
+ */
+int platform_irq_count(struct platform_device *dev)
+{
+ int ret, nr = 0;
+
+ while ((ret = platform_get_irq(dev, nr)) >= 0)
+ nr++;
+
+ if (ret == -EPROBE_DEFER)
+ return ret;
+
+ return nr;
+}
+EXPORT_SYMBOL_GPL(platform_irq_count);
+
+/**
* platform_get_resource_byname - get a resource for a device by name
* @dev: platform device
* @type: resource type
diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h
index dc777be5f2e1..6abd019c76f8 100644
--- a/include/linux/platform_device.h
+++ b/include/linux/platform_device.h
@@ -51,6 +51,7 @@ extern void arch_setup_pdev_archdata(struct platform_device *);
extern struct resource *platform_get_resource(struct platform_device *,
unsigned int, unsigned int);
extern int platform_get_irq(struct platform_device *, unsigned int);
+extern int platform_irq_count(struct platform_device *);
extern struct resource *platform_get_resource_byname(struct platform_device *,
unsigned int,
const char *);