broadsheetfb: add MMIO hooks

Allow boards with GP-MMIO controllers to provide hooks to broadsheetfb in
order to offload cmd/data writes and data reads instead of relying only on
host based GPIO wiggling.

Signed-off-by: Jaya Kumar <jayakumar.lkml@gmail.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 13 insertions, 4 deletions

diff --git a/include/video/broadsheetfb.h b/include/video/broadsheetfb.h
index a2c2829ceb38..d65b6689e92c 100644
--- a/include/video/broadsheetfb.h
+++ b/include/video/broadsheetfb.h
@@ -34,6 +34,10 @@
 #define BS_DC   0x02
 #define BS_WR   0x03
 
+/* Broadsheet IO interface specific defines */
+#define BS_MMIO_CMD     0x01
+#define BS_MMIO_DATA    0x02
+
 /* struct used by broadsheet. board specific stuff comes from *board */
 struct broadsheetfb_par {
         struct fb_info *info;
@@ -49,12 +53,17 @@ struct broadsheet_board {
         struct module *owner;
         int (*init)(struct broadsheetfb_par *);
         int (*wait_for_rdy)(struct broadsheetfb_par *);
-        void (*set_ctl)(struct broadsheetfb_par *, unsigned char, u8);
-        void (*set_hdb)(struct broadsheetfb_par *, u16);
-        u16 (*get_hdb)(struct broadsheetfb_par *);
         void (*cleanup)(struct broadsheetfb_par *);
         int (*get_panel_type)(void);
         int (*setup_irq)(struct fb_info *);
-};
 
+        /* Functions for boards that use GPIO */
+        void (*set_ctl)(struct broadsheetfb_par *, unsigned char, u8);
+        void (*set_hdb)(struct broadsheetfb_par *, u16);
+        u16 (*get_hdb)(struct broadsheetfb_par *);
+
+        /* Functions for boards that have specialized MMIO */
+        void (*mmio_write)(struct broadsheetfb_par *, int type, u16);
+        u16 (*mmio_read)(struct broadsheetfb_par *);
+};
 #endif