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Subject[PATCH] device property: Add fwnode_iomap()
Date
This patch introduces a new helper routine - fwnode_iomap(),
which allows to map the memory mapped IO for a given device node.

Signed-off-by: Anand Ashok Dumbre <anand.ashok.dumbre@xilinx.com>
---
drivers/base/property.c | 15 +++++++++++++++
include/linux/property.h | 2 ++
2 files changed, 17 insertions(+)

diff --git a/drivers/base/property.c b/drivers/base/property.c
index 453918eb7390..9323e9b5de02 100644
--- a/drivers/base/property.c
+++ b/drivers/base/property.c
@@ -1021,6 +1021,21 @@ int fwnode_irq_get(const struct fwnode_handle *fwnode, unsigned int index)
}
EXPORT_SYMBOL(fwnode_irq_get);

+/**
+ * fwnode_iomap - Maps the memory mapped IO for a given fwnode
+ * @fwnode: Pointer to the firmware node
+ * @index: Index of the IO range
+ *
+ * Returns a pointer to the mapped memory.
+ */
+void __iomem *fwnode_iomap(struct fwnode_handle *fwnode, int index) {
+ if (is_of_node(fwnode))
+ return of_iomap(to_of_node(fwnode), index);
+
+ return NULL;
+}
+EXPORT_SYMBOL(fwnode_iomap);
+
/**
* fwnode_graph_get_next_endpoint - Get next endpoint firmware node
* @fwnode: Pointer to the parent firmware node
diff --git a/include/linux/property.h b/include/linux/property.h
index 357513a977e5..9bb0b0155402 100644
--- a/include/linux/property.h
+++ b/include/linux/property.h
@@ -121,6 +121,8 @@ void fwnode_handle_put(struct fwnode_handle *fwnode);

int fwnode_irq_get(const struct fwnode_handle *fwnode, unsigned int index);

+void __iomem *fwnode_iomap(struct fwnode_handle *fwnode, int index);
+
unsigned int device_get_child_node_count(struct device *dev);

static inline bool device_property_read_bool(struct device *dev,
--
2.17.1
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