auxdisplay: charlcd: Extract character LCD core from misc/panel

[mirror_ubuntu-artful-kernel.git] / include / misc / charlcd.h

diff --git a/include/misc/charlcd.h b/include/misc/charlcd.h
new file mode 100644 (file)
index 0000000..c40047b
--- /dev/null
+++ b/include/misc/charlcd.h
@@ -0,0 +1,40 @@
+/*
+ * Character LCD driver for Linux
+ *
+ * Copyright (C) 2000-2008, Willy Tarreau <w@1wt.eu>
+ * Copyright (C) 2016-2017 Glider bvba
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+struct charlcd {
+       const struct charlcd_ops *ops;
+       const unsigned char *char_conv; /* Optional */
+
+       int height;
+       int width;
+       int bwidth;                     /* Default set by charlcd_alloc() */
+       int hwidth;                     /* Default set by charlcd_alloc() */
+
+       void *drvdata;                  /* Set by charlcd_alloc() */
+};
+
+struct charlcd_ops {
+       /* Required */
+       void (*write_cmd)(struct charlcd *lcd, int cmd);
+       void (*write_data)(struct charlcd *lcd, int data);
+
+       /* Optional */
+       void (*clear_fast)(struct charlcd *lcd);
+       void (*backlight)(struct charlcd *lcd, int on);
+};
+
+struct charlcd *charlcd_alloc(unsigned int drvdata_size);
+
+int charlcd_register(struct charlcd *lcd);
+int charlcd_unregister(struct charlcd *lcd);
+
+void charlcd_poke(struct charlcd *lcd);