rpmsg: add helper macro module_rpmsg_driver

This patch introduces the module_rpmsg_driver macro which is a
convenience macro for rpmsg driver modules similar to
module_platform_driver. It is intended to be used by drivers which
init/exit section does nothing but register/unregister the rpmsg driver.
By using this macro it is possible to eliminate a few lines of
boilerplate code per rpmsg driver.

Signed-off-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

1 files changed, 12 insertions, 0 deletions

diff --git a/include/linux/rpmsg.h b/include/linux/rpmsg.h
index 7ff5790c185a..ada50ff36da0 100644
--- a/include/linux/rpmsg.h
+++ b/include/linux/rpmsg.h
@@ -182,6 +182,18 @@ rpmsg_send_offchannel_raw(struct rpmsg_channel *, u32, u32, void *, int, bool);
         __register_rpmsg_driver(drv, THIS_MODULE)
 
 /**
+ * module_rpmsg_driver() - Helper macro for registering an rpmsg driver
+ * @__rpmsg_driver: rpmsg_driver struct
+ *
+ * Helper macro for rpmsg drivers which do not do anything special in module
+ * init/exit. This eliminates a lot of boilerplate.  Each module may only
+ * use this macro once, and calling it replaces module_init() and module_exit()
+ */
+#define module_rpmsg_driver(__rpmsg_driver) \
+        module_driver(__rpmsg_driver, register_rpmsg_driver, \
+                        unregister_rpmsg_driver)
+
+/**
  * rpmsg_send() - send a message across to the remote processor
  * @rpdev: the rpmsg channel
  * @data: payload of message