linux/drivers/staging/fbtft/fb_ssd1325.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * FB driver for the SSD1325 OLED Controller
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/gpio/consumer.h>
#include <linux/delay.h>

#include "fbtft.h"

#define DRVNAME …

#define WIDTH …
#define HEIGHT …
#define GAMMA_NUM …
#define GAMMA_LEN …
#define DEFAULT_GAMMA …

/*
 * write_reg() caveat:
 *
 *    This doesn't work because D/C has to be LOW for both values:
 *      write_reg(par, val1, val2);
 *
 *    Do it like this:
 *      write_reg(par, val1);
 *      write_reg(par, val2);
 */

/* Init sequence taken from the Adafruit SSD1306 Arduino library */
static int init_display(struct fbtft_par *par)
{ … }

static uint8_t rgb565_to_g16(u16 pixel)
{ … }

static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
{ … }

static int blank(struct fbtft_par *par, bool on)
{ … }

/*
 * Grayscale Lookup Table
 * GS1 - GS15
 * The "Gamma curve" contains the relative values between the entries
 * in the Lookup table.
 *
 * 0 = Setting of GS1 < Setting of GS2 < Setting of GS3.....<
 * Setting of GS14 < Setting of GS15
 */
static int set_gamma(struct fbtft_par *par, u32 *curves)
{ … }

static int write_vmem(struct fbtft_par *par, size_t offset, size_t len)
{ … }

static struct fbtft_display display = …;

FBTFT_REGISTER_DRIVER(…);

MODULE_ALIAS(…) …;
MODULE_ALIAS(…) …;
MODULE_ALIAS(…) …;
MODULE_ALIAS(…) …;

MODULE_DESCRIPTION(…) …;
MODULE_AUTHOR(…) …;
MODULE_LICENSE(…) …;