1 files changed, 49 insertions, 4 deletions

diff --git a/drivers/auxdisplay/line-display.h b/drivers/auxdisplay/line-display.h
index 0f5891d34c48..4348d7a2f69a 100644
--- a/drivers/auxdisplay/line-display.h
+++ b/drivers/auxdisplay/line-display.h
@@ -11,33 +11,78 @@
 #ifndef _LINEDISP_H
 #define _LINEDISP_H
 
+#include <linux/device.h>
+#include <linux/timer_types.h>
+
+#include <linux/map_to_7segment.h>
+#include <linux/map_to_14segment.h>
+
+struct linedisp;
+
+/**
+ * enum linedisp_map_type - type of the character mapping
+ * @LINEDISP_MAP_SEG7: Map characters to 7 segment display
+ * @LINEDISP_MAP_SEG14: Map characters to 14 segment display
+ */
+enum linedisp_map_type {
+	LINEDISP_MAP_SEG7,
+	LINEDISP_MAP_SEG14,
+};
+
+/**
+ * struct linedisp_map - character mapping
+ * @type: type of the character mapping
+ * @map: conversion character mapping
+ * @size: size of the @map
+ */
+struct linedisp_map {
+	enum linedisp_map_type type;
+	union {
+		struct seg7_conversion_map seg7;
+		struct seg14_conversion_map seg14;
+	} map;
+	unsigned int size;
+};
+
+/**
+ * struct linedisp_ops - character line display operations
+ * @get_map_type: Function called to get the character mapping, if required
+ * @update: Function called to update the display. This must not sleep!
+ */
+struct linedisp_ops {
+	int (*get_map_type)(struct linedisp *linedisp);
+	void (*update)(struct linedisp *linedisp);
+};
+
 /**
  * struct linedisp - character line display private data structure
  * @dev: the line display device
  * @timer: timer used to implement scrolling
- * @update: function called to update the display
+ * @ops: character line display operations
  * @buf: pointer to the buffer for the string currently displayed
  * @message: the full message to display or scroll on the display
  * @num_chars: the number of characters that can be displayed
  * @message_len: the length of the @message string
  * @scroll_pos: index of the first character of @message currently displayed
  * @scroll_rate: scroll interval in jiffies
+ * @id: instance id of this display
  */
 struct linedisp {
 	struct device dev;
 	struct timer_list timer;
-	void (*update)(struct linedisp *linedisp);
+	const struct linedisp_ops *ops;
+	struct linedisp_map *map;
 	char *buf;
 	char *message;
 	unsigned int num_chars;
 	unsigned int message_len;
 	unsigned int scroll_pos;
 	unsigned int scroll_rate;
+	unsigned int id;
 };
 
 int linedisp_register(struct linedisp *linedisp, struct device *parent,
-		      unsigned int num_chars, char *buf,
-		      void (*update)(struct linedisp *linedisp));
+		      unsigned int num_chars, const struct linedisp_ops *ops);
 void linedisp_unregister(struct linedisp *linedisp);
 
 #endif /* LINEDISP_H */