/* SPDX-License-Identifier: GPL-2.0-only */
/* drivers/video/backlight/ili9320.h
 *
 * ILI9320 LCD controller driver core.
 *
 * Copyright 2007 Simtec Electronics
 *      Ben Dooks <ben@simtec.co.uk>
 *
 * http://armlinux.simtec.co.uk/
*/

/* Holder for register and value pairs. */
struct ili9320_reg {
        unsigned short          address;
        unsigned short          value;
};

struct ili9320;

struct ili9320_client {
        const char      *name;
        int     (*init)(struct ili9320 *ili, struct ili9320_platdata *cfg);

};
/* Device attached via an SPI bus. */
struct  ili9320_spi {
        struct spi_device       *dev;
        struct spi_message      message;
        struct spi_transfer     xfer[2];

        unsigned char           id;
        unsigned char           buffer_addr[4];
        unsigned char           buffer_data[4];
};

/* ILI9320 device state. */
struct ili9320 {
        union {
                struct ili9320_spi      spi;    /* SPI attachged device. */
        } access;                               /* Register access method. */

        struct device                   *dev;
        struct lcd_device               *lcd;   /* LCD device we created. */
        struct ili9320_client           *client;
        struct ili9320_platdata         *platdata;

        int                              power; /* current power state. */
        int                              initialised;

        unsigned short                   display1;
        unsigned short                   power1;

        int (*write)(struct ili9320 *ili, unsigned int reg, unsigned int val);
};


/* ILI9320 register access routines */

extern int ili9320_write(struct ili9320 *ili,
                         unsigned int reg, unsigned int value);

extern int ili9320_write_regs(struct ili9320 *ili,
                              const struct ili9320_reg *values,
                              int nr_values);

/* Device probe */

extern int ili9320_probe_spi(struct spi_device *spi,
                             struct ili9320_client *cli);

extern void ili9320_remove(struct ili9320 *lcd);
extern void ili9320_shutdown(struct ili9320 *lcd);

/* PM */

extern int ili9320_suspend(struct ili9320 *lcd);
extern int ili9320_resume(struct ili9320 *lcd);