linux/drivers/gpio/gpio-ts4900.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Digital I/O driver for Technologic Systems I2C FPGA Core
 *
 * Copyright (C) 2015, 2018 Technologic Systems
 * Copyright (C) 2016 Savoir-Faire Linux
 */

#include <linux/gpio/driver.h>
#include <linux/i2c.h>
#include <linux/of.h>
#include <linux/module.h>
#include <linux/regmap.h>

#define DEFAULT_PIN_NUMBER …
/*
 * Register bits used by the GPIO device
 * Some boards, such as TS-7970 do not have a separate input bit
 */
#define TS4900_GPIO_OE …
#define TS4900_GPIO_OUT …
#define TS4900_GPIO_IN …
#define TS7970_GPIO_IN …

struct ts4900_gpio_priv { … };

static int ts4900_gpio_get_direction(struct gpio_chip *chip,
				     unsigned int offset)
{ … }

static int ts4900_gpio_direction_input(struct gpio_chip *chip,
				       unsigned int offset)
{ … }

static int ts4900_gpio_direction_output(struct gpio_chip *chip,
					unsigned int offset, int value)
{ … }

static int ts4900_gpio_get(struct gpio_chip *chip, unsigned int offset)
{ … }

static void ts4900_gpio_set(struct gpio_chip *chip, unsigned int offset,
			    int value)
{ … }

static const struct regmap_config ts4900_regmap_config = …;

static const struct gpio_chip template_chip = …;

static const struct of_device_id ts4900_gpio_of_match_table[] = …;
MODULE_DEVICE_TABLE(of, ts4900_gpio_of_match_table);

static int ts4900_gpio_probe(struct i2c_client *client)
{ … }

static const struct i2c_device_id ts4900_gpio_id_table[] = …;
MODULE_DEVICE_TABLE(i2c, ts4900_gpio_id_table);

static struct i2c_driver ts4900_gpio_driver = …;
module_i2c_driver(…) …;

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