1 files changed, 14 insertions, 2 deletions

diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index 387e428f1cd..4be01bb4437 100644
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -82,7 +82,7 @@ struct spi_device {
         int                     irq;
         void                    *controller_state;
         void                    *controller_data;
-        const char              *modalias;
+        char                    modalias[32];
 
         /*
          * likely need more hooks for more protocol options affecting how
@@ -733,7 +733,7 @@ struct spi_board_info {
          * controller_data goes to spi_device.controller_data,
          * irq is copied too
          */
-        char            modalias[KOBJ_NAME_LEN];
+        char            modalias[32];
         const void      *platform_data;
         void            *controller_data;
         int             irq;
@@ -778,8 +778,20 @@ spi_register_board_info(struct spi_board_info const *info, unsigned n)
  * use spi_new_device() to describe each device.  You can also call
  * spi_unregister_device() to start making that device vanish, but
  * normally that would be handled by spi_unregister_master().
+ *
+ * You can also use spi_alloc_device() and spi_add_device() to use a two
+ * stage registration sequence for each spi_device.  This gives the caller
+ * some more control over the spi_device structure before it is registered,
+ * but requires that caller to initialize fields that would otherwise
+ * be defined using the board info.
  */
 extern struct spi_device *
+spi_alloc_device(struct spi_master *master);
+
+extern int
+spi_add_device(struct spi_device *spi);
+
+extern struct spi_device *
 spi_new_device(struct spi_master *, struct spi_board_info *);
 
 static inline void