staging: comedi: Add helper macro for comedi_driver boilerplate

[karo-tx-linux.git] / drivers / staging / comedi / comedidev.h

diff --git a/drivers/staging/comedi/comedidev.h b/drivers/staging/comedi/comedidev.h
index 300fd8400a4b2813c357d380543b75bb6c779a9f..8828609f1ed6c316e313ec8982ed32cae4b512e5 100644 (file)
--- a/drivers/staging/comedi/comedidev.h
+++ b/drivers/staging/comedi/comedidev.h
@@ -235,6 +235,11 @@ struct comedi_device {
        void (*close) (struct comedi_device *dev);
 };
 
+static inline const void *comedi_board(struct comedi_device *dev)
+{
+       return dev->board_ptr;
+}
+
 struct comedi_device_file_info {
        struct comedi_device *device;
        struct comedi_subdevice *read_subdevice;
@@ -293,6 +298,18 @@ int comedi_device_attach(struct comedi_device *dev,
 int comedi_driver_register(struct comedi_driver *);
 int comedi_driver_unregister(struct comedi_driver *);
 
+/**
+ * module_comedi_driver() - Helper macro for registering a comedi driver
+ * @__comedi_driver: comedi_driver struct
+ *
+ * Helper macro for comedi 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_comedi_driver(__comedi_driver) \
+       module_driver(__comedi_driver, comedi_driver_register, \
+                       comedi_driver_unregister)
+
 void init_polling(void);
 void cleanup_polling(void);
 void start_polling(struct comedi_device *);