1 files changed, 59 insertions, 2 deletions

diff --git a/include/linux/soc/qcom/smd.h b/include/linux/soc/qcom/smd.h
index d0cb6d189a0a..cbb0f06c41b2 100644
--- a/include/linux/soc/qcom/smd.h
+++ b/include/linux/soc/qcom/smd.h
@@ -26,6 +26,8 @@ struct qcom_smd_device {
 	struct qcom_smd_channel *channel;
 };
 
+typedef int (*qcom_smd_cb_t)(struct qcom_smd_channel *, const void *, size_t);
+
 /**
  * struct qcom_smd_driver - smd driver struct
  * @driver:	underlying device driver
@@ -42,16 +44,71 @@ struct qcom_smd_driver {
 
 	int (*probe)(struct qcom_smd_device *dev);
 	void (*remove)(struct qcom_smd_device *dev);
-	int (*callback)(struct qcom_smd_device *, const void *, size_t);
+	qcom_smd_cb_t callback;
 };
 
+#if IS_ENABLED(CONFIG_QCOM_SMD)
+
 int qcom_smd_driver_register(struct qcom_smd_driver *drv);
 void qcom_smd_driver_unregister(struct qcom_smd_driver *drv);
 
+struct qcom_smd_channel *qcom_smd_open_channel(struct qcom_smd_channel *channel,
+					       const char *name,
+					       qcom_smd_cb_t cb);
+void *qcom_smd_get_drvdata(struct qcom_smd_channel *channel);
+void qcom_smd_set_drvdata(struct qcom_smd_channel *channel, void *data);
+int qcom_smd_send(struct qcom_smd_channel *channel, const void *data, int len);
+
+
+#else
+
+static inline int qcom_smd_driver_register(struct qcom_smd_driver *drv)
+{
+	return -ENXIO;
+}
+
+static inline void qcom_smd_driver_unregister(struct qcom_smd_driver *drv)
+{
+	/* This shouldn't be possible */
+	WARN_ON(1);
+}
+
+static inline struct qcom_smd_channel *
+qcom_smd_open_channel(struct qcom_smd_channel *channel,
+		      const char *name,
+		      qcom_smd_cb_t cb)
+{
+	/* This shouldn't be possible */
+	WARN_ON(1);
+	return NULL;
+}
+
+void *qcom_smd_get_drvdata(struct qcom_smd_channel *channel)
+{
+	/* This shouldn't be possible */
+	WARN_ON(1);
+	return NULL;
+}
+
+void qcom_smd_set_drvdata(struct qcom_smd_channel *channel, void *data)
+{
+	/* This shouldn't be possible */
+	WARN_ON(1);
+}
+
+static inline int qcom_smd_send(struct qcom_smd_channel *channel,
+				const void *data, int len)
+{
+	/* This shouldn't be possible */
+	WARN_ON(1);
+	return -ENXIO;
+}
+
+#endif
+
 #define module_qcom_smd_driver(__smd_driver) \
 	module_driver(__smd_driver, qcom_smd_driver_register, \
 		      qcom_smd_driver_unregister)
 
-int qcom_smd_send(struct qcom_smd_channel *channel, const void *data, int len);
 
 #endif