media: v4l2-ctrl: Add new helper v4l2_ctrl_ptr_create

This helper function simplifies the code by not needing a union
v4l2_ctrl_ptr and an assignment every time we need to use
a ctrl_ptr.

Suggested-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Ricardo Ribalda Delgado <ribalda@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

diff --git a/include/media/v4l2-ctrls.h b/include/media/v4l2-ctrls.h
index c9ca867..26205ba 100644 (file)
--- a/include/media/v4l2-ctrls.h
+++ b/include/media/v4l2-ctrls.h
@@ -74,6 +74,18 @@ union v4l2_ctrl_ptr {
 };
 
 /**
+ * v4l2_ctrl_ptr_create() - Helper function to return a v4l2_ctrl_ptr from a
+ * void pointer
+ * @ptr:       The void pointer
+ */
+static inline union v4l2_ctrl_ptr v4l2_ctrl_ptr_create(void *ptr)
+{
+       union v4l2_ctrl_ptr p = { .p = ptr };
+
+       return p;
+}
+
+/**
  * struct v4l2_ctrl_ops - The control operations that the driver has to provide.
  *
  * @g_volatile_ctrl: Get a new value for this control. Generally only relevant