/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * Character LCD driver for Linux * * Copyright (C) 2000-2008, Willy Tarreau <w@1wt.eu> * Copyright (C) 2016-2017 Glider bvba */ 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);