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From:   Suzuki K Poulose <suzuki.poulose@arm.com>
To:     linux-arm-kernel@lists.infradead.org
Cc:     linux-kernel@vger.kernel.org, mathieu.poirier@linaro.org,
        mike.leach@linaro.org, robert.walker@arm.com, mark.rutland@arm.com,
        will.deacon@arm.com, robin.murphy@arm.com, sudeep.holla@arm.com,
        frowand.list@gmail.com, robh@kernel.org, john.horley@arm.com,
        Suzuki K Poulose <suzuki.poulose@arm.com>
Subject: [PATCH v2 02/27] coresight: Cleanup device subtype struct
Date:   Tue,  1 May 2018 10:10:32 +0100
Message-Id: <1525165857-11096-3-git-send-email-suzuki.poulose@arm.com>
In-Reply-To: <1525165857-11096-1-git-send-email-suzuki.poulose@arm.com>
References: <1525165857-11096-1-git-send-email-suzuki.poulose@arm.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

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.poirier@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@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 d950dad..556fe59 100644
--- a/include/linux/coresight.h
+++ b/include/linux/coresight.h
@@ -70,17 +70,20 @@ 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;
 };
 
@@ -120,7 +123,7 @@ 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;
@@ -164,7 +167,7 @@ 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