linux/drivers/misc/hmc6352.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * hmc6352.c - Honeywell Compass Driver
 *
 * Copyright (C) 2009 Intel Corp
 *
 *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/err.h>
#include <linux/delay.h>
#include <linux/sysfs.h>
#include <linux/nospec.h>

static DEFINE_MUTEX(compass_mutex);

static int compass_command(struct i2c_client *c, u8 cmd)
{ … }

static int compass_store(struct device *dev, const char *buf, size_t count,
			const char *map)
{ … }

static ssize_t compass_calibration_store(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count)
{ … }

static ssize_t compass_power_mode_store(struct device *dev,
		struct device_attribute *attr, const  char *buf, size_t count)
{ … }

static ssize_t compass_heading_data_show(struct device *dev,
			struct device_attribute *attr, char *buf)
{ … }


static DEVICE_ATTR(heading0_input, S_IRUGO, compass_heading_data_show, NULL);
static DEVICE_ATTR(calibration, S_IWUSR, NULL, compass_calibration_store);
static DEVICE_ATTR(power_state, S_IWUSR, NULL, compass_power_mode_store);

static struct attribute *mid_att_compass[] = …;

static const struct attribute_group m_compass_gr = …;

static int hmc6352_probe(struct i2c_client *client)
{ … }

static void hmc6352_remove(struct i2c_client *client)
{ … }

static const struct i2c_device_id hmc6352_id[] = …;

MODULE_DEVICE_TABLE(i2c, hmc6352_id);

static struct i2c_driver hmc6352_driver = …;

module_i2c_driver(…) …;

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