Allows to obtain a reference to the global /dev/ion backing
struct ion_device via devicetree.
Signed-off-by: Moritz Fischer <moritz.fisc...@ettus.com>
---
drivers/staging/android/ion/ion.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/staging/android/ion/ion.c
b/drivers/staging/android/ion/ion.c
index e237e9f..cea264e0 100644
--- a/drivers/staging/android/ion/ion.c
+++ b/drivers/staging/android/ion/ion.c
@@ -64,6 +64,16 @@ struct ion_device {
struct dentry *clients_debug_root;
};
+struct ion_device *of_ion_device_get(struct device_node *node)
+{
+ struct miscdevice *mdev = of_misc_get(node);
+
+ if (IS_ERR(mdev))
+ return ERR_PTR(PTR_ERR(mdev));
+
+ return container_of(mdev, struct ion_device, dev);
+}
+
/**
* struct ion_client - a process/hw block local address space
* @node: node in the tree of all clients
--
2.7.4
