drivers/video/backlight/ili9320.h

   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);