device: Add a dev_request_mem_region function

We might want to add real resource tracking later. Also
The first resource may not be a IORESOURCE_MEM at all.
For these reasons introduce a wrapper function for
driver so that they do not have to fiddle with resources
directly.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/include/driver.h b/include/driver.h
index ed3df16f7c..0fc254dbbc 100644
--- a/include/driver.h
+++ b/include/driver.h
@@ -188,6 +188,20 @@ static inline const char *dev_name(const struct device_d *dev)
 	return dev_id(dev);
 }
 
+/*
+ * get register base 'num' for a device
+ */
+void __iomem *dev_get_mem_region(struct device_d *dev, int num);
+
+/*
+ * exlusively request register base 'num' for a device
+ */
+static inline void __iomem *dev_request_mem_region(struct device_d *dev, int num)
+{
+	/* no resource tracking yet */
+	return dev_get_mem_region(dev, num);
+}
+
 /* linear list over all available devices
  */
 extern struct list_head device_list;