/* 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);