linux/drivers/hwmon/tmp421.c

// SPDX-License-Identifier: GPL-2.0-or-later
/* tmp421.c
 *
 * Copyright (C) 2009 Andre Prendel <[email protected]>
 * Preliminary support by:
 * Melvin Rook, Raymond Ng
 */

/*
 * Driver for the Texas Instruments TMP421 SMBus temperature sensor IC.
 * Supported models: TMP421, TMP422, TMP423, TMP441, TMP442
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/sysfs.h>

/* Addresses to scan */
static const unsigned short normal_i2c[] = …;

enum chips { … };

#define MAX_CHANNELS …
/* The TMP421 registers */
#define TMP421_STATUS_REG …
#define TMP421_CONFIG_REG_1 …
#define TMP421_CONFIG_REG_2 …
#define TMP421_CONFIG_REG_REN(x) …
#define TMP421_CONFIG_REG_REN_MASK …
#define TMP421_CONVERSION_RATE_REG …
#define TMP421_N_FACTOR_REG_1 …
#define TMP421_MANUFACTURER_ID_REG …
#define TMP421_DEVICE_ID_REG …

static const u8 TMP421_TEMP_MSB[MAX_CHANNELS]	= …;
static const u8 TMP421_TEMP_LSB[MAX_CHANNELS]	= …;

/* Flags */
#define TMP421_CONFIG_SHUTDOWN …
#define TMP421_CONFIG_RANGE …

/* Manufacturer / Device ID's */
#define TMP421_MANUFACTURER_ID …
#define TMP421_DEVICE_ID …
#define TMP422_DEVICE_ID …
#define TMP423_DEVICE_ID …
#define TMP441_DEVICE_ID …
#define TMP442_DEVICE_ID …

static const struct i2c_device_id tmp421_id[] = …;
MODULE_DEVICE_TABLE(i2c, tmp421_id);

static const struct of_device_id __maybe_unused tmp421_of_match[] = …;
MODULE_DEVICE_TABLE(of, tmp421_of_match);

struct tmp421_channel { … };

struct tmp421_data { … };

static int temp_from_raw(u16 reg, bool extended)
{ … }

static int tmp421_update_device(struct tmp421_data *data)
{ … }

static int tmp421_enable_channels(struct tmp421_data *data)
{ … }

static int tmp421_read(struct device *dev, enum hwmon_sensor_types type,
		       u32 attr, int channel, long *val)
{ … }

static int tmp421_read_string(struct device *dev, enum hwmon_sensor_types type,
			     u32 attr, int channel, const char **str)
{ … }

static int tmp421_write(struct device *dev, enum hwmon_sensor_types type,
			u32 attr, int channel, long val)
{ … }

static umode_t tmp421_is_visible(const void *data, enum hwmon_sensor_types type,
				 u32 attr, int channel)
{ … }

static int tmp421_init_client(struct tmp421_data *data)
{ … }

static int tmp421_detect(struct i2c_client *client,
			 struct i2c_board_info *info)
{ … }

static int tmp421_probe_child_from_dt(struct i2c_client *client,
				      struct device_node *child,
				      struct tmp421_data *data)

{ … }

static int tmp421_probe_from_dt(struct i2c_client *client, struct tmp421_data *data)
{ … }

static const struct hwmon_ops tmp421_ops = …;

static int tmp421_probe(struct i2c_client *client)
{ … }

static struct i2c_driver tmp421_driver = …;

module_i2c_driver(…) …;

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