linux/drivers/gpio/gpio-pca9570.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Driver for PCA9570 I2C GPO expander
 *
 * Copyright (C) 2020 Sungbo Eo <[email protected]>
 *
 * Based on gpio-tpic2810.c
 * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
 *	Andrew F. Davis <[email protected]>
 */

#include <linux/gpio/driver.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/property.h>

#define SLG7XL45106_GPO_REG …

/**
 * struct pca9570_chip_data - GPIO platformdata
 * @ngpio: no of gpios
 * @command: Command to be sent
 */
struct pca9570_chip_data { … };

/**
 * struct pca9570 - GPIO driver data
 * @chip: GPIO controller chip
 * @chip_data: GPIO controller platform data
 * @lock: Protects write sequences
 * @out: Buffer for device register
 */
struct pca9570 { … };

static int pca9570_read(struct pca9570 *gpio, u8 *value)
{ … }

static int pca9570_write(struct pca9570 *gpio, u8 value)
{ … }

static int pca9570_get_direction(struct gpio_chip *chip,
				 unsigned offset)
{ … }

static int pca9570_get(struct gpio_chip *chip, unsigned offset)
{ … }

static void pca9570_set(struct gpio_chip *chip, unsigned offset, int value)
{ … }

static int pca9570_probe(struct i2c_client *client)
{ … }

static const struct pca9570_chip_data pca9570_gpio = …;

static const struct pca9570_chip_data pca9571_gpio = …;

static const struct pca9570_chip_data slg7xl45106_gpio = …;

static const struct i2c_device_id pca9570_id_table[] = …;
MODULE_DEVICE_TABLE(i2c, pca9570_id_table);

static const struct of_device_id pca9570_of_match_table[] = …;
MODULE_DEVICE_TABLE(of, pca9570_of_match_table);

static struct i2c_driver pca9570_driver = …;
module_i2c_driver(…) …;

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