linux/drivers/hwmon/powr1220.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * powr1220.c - Driver for the Lattice POWR1220 programmable power supply
 * and monitor. Users can read all ADC inputs along with their labels
 * using the sysfs nodes.
 *
 * Copyright (c) 2014 Echo360 https://www.echo360.com
 * Scott Kanowitz <[email protected]> <[email protected]>
 */

#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/delay.h>

#define ADC_STEP_MV …
#define ADC_MAX_LOW_MEASUREMENT_MV …

enum powr1xxx_chips { … };

enum powr1220_regs { … };

enum powr1220_adc_values { … };

struct powr1220_data { … };

static const char * const input_names[] = …;

/* Reads the specified ADC channel */
static int powr1220_read_adc(struct device *dev, int ch_num)
{ … }

static umode_t
powr1220_is_visible(const void *data, enum hwmon_sensor_types type, u32
		    attr, int channel)
{ … }

static int
powr1220_read_string(struct device *dev, enum hwmon_sensor_types type, u32 attr,
		     int channel, const char **str)
{ … }

static int
powr1220_read(struct device *dev, enum hwmon_sensor_types type, u32
	      attr, int channel, long *val)
{ … }

static const struct hwmon_channel_info * const powr1220_info[] = …;

static const struct hwmon_ops powr1220_hwmon_ops = …;

static const struct hwmon_chip_info powr1220_chip_info = …;

static int powr1220_probe(struct i2c_client *client)
{ … }

static const struct i2c_device_id powr1220_ids[] = …;

MODULE_DEVICE_TABLE(i2c, powr1220_ids);

static struct i2c_driver powr1220_driver = …;

module_i2c_driver(…) …;

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