linux/drivers/gpio/gpio-xra1403.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * GPIO driver for EXAR XRA1403 16-bit GPIO expander
 *
 * Copyright (c) 2017, General Electric Company
 */

#include <linux/bitops.h>
#include <linux/gpio/driver.h>
#include <linux/kernel.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/seq_file.h>
#include <linux/spi/spi.h>
#include <linux/regmap.h>

/* XRA1403 registers */
#define XRA_GSR …
#define XRA_OCR …
#define XRA_PIR …
#define XRA_GCR …
#define XRA_PUR …
#define XRA_IER …
#define XRA_TSCR …
#define XRA_ISR …
#define XRA_REIR …
#define XRA_FEIR …
#define XRA_IFR …
#define XRA_LAST …

struct xra1403 { … };

static const struct regmap_config xra1403_regmap_cfg = …;

static unsigned int to_reg(unsigned int reg, unsigned int offset)
{ … }

static int xra1403_direction_input(struct gpio_chip *chip, unsigned int offset)
{ … }

static int xra1403_direction_output(struct gpio_chip *chip, unsigned int offset,
				    int value)
{ … }

static int xra1403_get_direction(struct gpio_chip *chip, unsigned int offset)
{ … }

static int xra1403_get(struct gpio_chip *chip, unsigned int offset)
{ … }

static void xra1403_set(struct gpio_chip *chip, unsigned int offset, int value)
{ … }

#ifdef CONFIG_DEBUG_FS
static void xra1403_dbg_show(struct seq_file *s, struct gpio_chip *chip)
{ … }
#else
#define xra1403_dbg_show …
#endif

static int xra1403_probe(struct spi_device *spi)
{ … }

static const struct spi_device_id xra1403_ids[] = …;
MODULE_DEVICE_TABLE(spi, xra1403_ids);

static const struct of_device_id xra1403_spi_of_match[] = …;
MODULE_DEVICE_TABLE(of, xra1403_spi_of_match);

static struct spi_driver xra1403_driver = …;

module_spi_driver(…) …;

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