This is a note to let you know that I've just added the patch titled
device property: Add fwnode_iomap()
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
device-property-add-fwnode_iomap.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 8d7b3f37c7d32d09084a1426f9b244f7831d3c7a
Author: Anand Ashok Dumbre <anand.ashok.dumbre@xxxxxxxxxx>
Date: Fri Dec 3 21:23:54 2021 +0000
device property: Add fwnode_iomap()
[ Upstream commit eca6e2d4a4a4b824f055eeaaa24f1c2327fb91a2 ]
This patch introduces a new helper routine - fwnode_iomap(), which
allows to map the memory mapped IO for a given device node.
This implementation does not cover the ACPI case and may be expanded
in the future. The main purpose here is to be able to develop resource
provider agnostic drivers.
Suggested-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Signed-off-by: Anand Ashok Dumbre <anand.ashok.dumbre@xxxxxxxxxx>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Link: https://lore.kernel.org/r/20211203212358.31444-2-anand.ashok.dumbre@xxxxxxxxxx
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Stable-dep-of: 8d3cefaf6592 ("i2c: core: Lock address during client device instantiation")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/base/property.c b/drivers/base/property.c
index 21f4184db42fc..87bb97e12749e 100644
--- a/drivers/base/property.c
+++ b/drivers/base/property.c
@@ -1050,6 +1050,22 @@ 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_ENABLED(CONFIG_OF_ADDRESS) && 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 fe2092e39aedb..032262e3d9991 100644
--- a/include/linux/property.h
+++ b/include/linux/property.h
@@ -126,6 +126,8 @@ 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,
