[PATCH 1/6] coresight: Cleanup device subtype struct

[Suzuki K Poulose]

Clean up our struct a little bit by using a union instead of
a struct for tracking the subtype of a device.

Cc: Mathieu Poirier <mathieu.poir...@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poul...@arm.com>
---
 include/linux/coresight.h | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/include/linux/coresight.h b/include/linux/coresight.h
index 69a5c9f..7c188c2 100644
--- a/include/linux/coresight.h
+++ b/include/linux/coresight.h
@@ -63,17 +63,20 @@ enum coresight_dev_subtype_source {
 };
 
 /**
- * struct coresight_dev_subtype - further characterisation of a type
+ * union coresight_dev_subtype - further characterisation of a type
  * @sink_subtype:      type of sink this component is, as defined
-                       by @coresight_dev_subtype_sink.
+ *                     by @coresight_dev_subtype_sink.
  * @link_subtype:      type of link this component is, as defined
-                       by @coresight_dev_subtype_link.
+ *                     by @coresight_dev_subtype_link.
  * @source_subtype:    type of source this component is, as defined
-                       by @coresight_dev_subtype_source.
+ *                     by @coresight_dev_subtype_source.
  */
-struct coresight_dev_subtype {
-       enum coresight_dev_subtype_sink sink_subtype;
-       enum coresight_dev_subtype_link link_subtype;
+union coresight_dev_subtype {
+       /* We have some devices which acts as LINK and SINK */
+       struct {
+               enum coresight_dev_subtype_sink sink_subtype;
+               enum coresight_dev_subtype_link link_subtype;
+       };
        enum coresight_dev_subtype_source source_subtype;
 };
 
@@ -111,7 +114,7 @@ struct coresight_platform_data {
  */
 struct coresight_desc {
        enum coresight_dev_type type;
-       struct coresight_dev_subtype subtype;
+       union coresight_dev_subtype subtype;
        const struct coresight_ops *ops;
        struct coresight_platform_data *pdata;
        struct device *dev;
@@ -155,7 +158,7 @@ struct coresight_device {
        int nr_inport;
        int nr_outport;
        enum coresight_dev_type type;
-       struct coresight_dev_subtype subtype;
+       union coresight_dev_subtype subtype;
        const struct coresight_ops *ops;
        struct device dev;
        atomic_t *refcnt;
-- 
2.7.4