mcb: introduce mcb_get_resource()

Introduce mcb_get_resource() as a common accessor to a mcb device's memory or IRQ resources. Signed-off-by: Johannes Thumshirn <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
niw · Aug 28, 2017 · 2ce8008 · 2ce8008
1 parent 5aabd3b
commit 2ce8008
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Showing 2 changed files with 21 additions and 1 deletion.
diff --git a/drivers/mcb/mcb-core.c b/drivers/mcb/mcb-core.c
@@ -417,6 +417,22 @@ void mcb_bus_add_devices(const struct mcb_bus *bus)
 }
 EXPORT_SYMBOL_GPL(mcb_bus_add_devices);
 
+/**
+ * mcb_get_resource() - get a resource for a mcb device
+ * @dev: the mcb device
+ * @type: the type of resource
+ */
+struct resource *mcb_get_resource(struct mcb_device *dev, unsigned int type)
+{
+	if (type == IORESOURCE_MEM)
+		return &dev->mem;
+	else if (type == IORESOURCE_IRQ)
+		return &dev->irq;
+	else
+		return NULL;
+}
+EXPORT_SYMBOL_GPL(mcb_get_resource);
+
 /**
  * mcb_request_mem() - Request memory
  * @dev: The @mcb_device the memory is for
@@ -460,7 +476,9 @@ EXPORT_SYMBOL_GPL(mcb_release_mem);
 
 static int __mcb_get_irq(struct mcb_device *dev)
 {
-	struct resource *irq = &dev->irq;
+	struct resource *irq;
+
+	irq = mcb_get_resource(dev, IORESOURCE_IRQ);
 
 	return irq->start;
 }

diff --git a/include/linux/mcb.h b/include/linux/mcb.h
@@ -136,5 +136,7 @@ extern struct resource *mcb_request_mem(struct mcb_device *dev,
 					const char *name);
 extern void mcb_release_mem(struct resource *mem);
 extern int mcb_get_irq(struct mcb_device *dev);
+extern struct resource *mcb_get_resource(struct mcb_device *dev,
+					 unsigned int type);
 
 #endif /* _LINUX_MCB_H */