2545c1c948
hwidth is for the hardware buffer size and bwidth is for the buffer width of one single line. This is specific to the hd44780 displays and so it is moved out from charlcd to struct hd44780_common. Reviewed-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Lars Poeschel <poeschel@lemonage.de> Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
48 lines
1.0 KiB
C
48 lines
1.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Character LCD driver for Linux
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*
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* Copyright (C) 2000-2008, Willy Tarreau <w@1wt.eu>
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* Copyright (C) 2016-2017 Glider bvba
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*/
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#ifndef _CHARLCD_H
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#define _CHARLCD_H
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enum charlcd_onoff {
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CHARLCD_OFF = 0,
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CHARLCD_ON,
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};
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struct charlcd {
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const struct charlcd_ops *ops;
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const unsigned char *char_conv; /* Optional */
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int ifwidth; /* 4-bit or 8-bit (default) */
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int height;
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int width;
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void *drvdata;
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};
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struct charlcd_ops {
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/* Required */
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void (*write_cmd)(struct charlcd *lcd, int cmd);
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void (*write_data)(struct charlcd *lcd, int data);
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/* Optional */
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void (*write_cmd_raw4)(struct charlcd *lcd, int cmd); /* 4-bit only */
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void (*clear_fast)(struct charlcd *lcd);
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void (*backlight)(struct charlcd *lcd, enum charlcd_onoff on);
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};
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struct charlcd *charlcd_alloc(void);
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void charlcd_free(struct charlcd *lcd);
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int charlcd_register(struct charlcd *lcd);
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int charlcd_unregister(struct charlcd *lcd);
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void charlcd_poke(struct charlcd *lcd);
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#endif /* CHARLCD_H */
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