1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /* drivers/video/backlight/ili9320.h
3  *
4  * ILI9320 LCD controller driver core.
5  *
6  * Copyright 2007 Simtec Electronics
7  *	Ben Dooks <ben@simtec.co.uk>
8  *
9  * http://armlinux.simtec.co.uk/
10 */
11 
12 /* Holder for register and value pairs. */
13 struct ili9320_reg {
14 	unsigned short		address;
15 	unsigned short		value;
16 };
17 
18 struct ili9320;
19 
20 struct ili9320_client {
21 	const char	*name;
22 	int	(*init)(struct ili9320 *ili, struct ili9320_platdata *cfg);
23 
24 };
25 /* Device attached via an SPI bus. */
26 struct  ili9320_spi {
27 	struct spi_device	*dev;
28 	struct spi_message	message;
29 	struct spi_transfer	xfer[2];
30 
31 	unsigned char		id;
32 	unsigned char		buffer_addr[4];
33 	unsigned char		buffer_data[4];
34 };
35 
36 /* ILI9320 device state. */
37 struct ili9320 {
38 	union {
39 		struct ili9320_spi	spi;	/* SPI attachged device. */
40 	} access;				/* Register access method. */
41 
42 	struct device			*dev;
43 	struct lcd_device		*lcd;	/* LCD device we created. */
44 	struct ili9320_client		*client;
45 	struct ili9320_platdata		*platdata;
46 
47 	int				 power; /* current power state. */
48 	int				 initialised;
49 
50 	unsigned short			 display1;
51 	unsigned short			 power1;
52 
53 	int (*write)(struct ili9320 *ili, unsigned int reg, unsigned int val);
54 };
55 
56 
57 /* ILI9320 register access routines */
58 
59 extern int ili9320_write(struct ili9320 *ili,
60 			 unsigned int reg, unsigned int value);
61 
62 extern int ili9320_write_regs(struct ili9320 *ili,
63 			      const struct ili9320_reg *values,
64 			      int nr_values);
65 
66 /* Device probe */
67 
68 extern int ili9320_probe_spi(struct spi_device *spi,
69 			     struct ili9320_client *cli);
70 
71 extern int ili9320_remove(struct ili9320 *lcd);
72 extern void ili9320_shutdown(struct ili9320 *lcd);
73 
74 /* PM */
75 
76 extern int ili9320_suspend(struct ili9320 *lcd);
77 extern int ili9320_resume(struct ili9320 *lcd);
78