forked from Minki/linux
8e44fc8506
The charlcd_free() is a counterpart to charlcd_alloc() and should be called symmetrically on tear down. Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
44 lines
1.2 KiB
C
44 lines
1.2 KiB
C
/*
|
|
* 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 ifwidth; /* 4-bit or 8-bit (default) */
|
|
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 (*write_cmd_raw4)(struct charlcd *lcd, int cmd); /* 4-bit only */
|
|
void (*clear_fast)(struct charlcd *lcd);
|
|
void (*backlight)(struct charlcd *lcd, int on);
|
|
};
|
|
|
|
struct charlcd *charlcd_alloc(unsigned int drvdata_size);
|
|
void charlcd_free(struct charlcd *lcd);
|
|
|
|
int charlcd_register(struct charlcd *lcd);
|
|
int charlcd_unregister(struct charlcd *lcd);
|
|
|
|
void charlcd_poke(struct charlcd *lcd);
|