linux/drivers/gpio/gpio-max7301.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2006 Juergen Beisert, Pengutronix
 * Copyright (C) 2008 Guennadi Liakhovetski, Pengutronix
 * Copyright (C) 2009 Wolfram Sang, Pengutronix
 *
 * Check max730x.c for further details.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/spi/spi.h>
#include <linux/spi/max7301.h>

/* A write to the MAX7301 means one message with one transfer */
static int max7301_spi_write(struct device *dev, unsigned int reg,
				unsigned int val)
{ … }

/* A read from the MAX7301 means two transfers; here, one message each */

static int max7301_spi_read(struct device *dev, unsigned int reg)
{ … }

static int max7301_probe(struct spi_device *spi)
{ … }

static void max7301_remove(struct spi_device *spi)
{ … }

static const struct spi_device_id max7301_id[] = …;
MODULE_DEVICE_TABLE(spi, max7301_id);

static struct spi_driver max7301_driver = …;

static int __init max7301_init(void)
{ … }
/* register after spi postcore initcall and before
 * subsys initcalls that may rely on these GPIOs
 */
subsys_initcall(max7301_init);

static void __exit max7301_exit(void)
{ … }
module_exit(max7301_exit);

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