linux/drivers/hwmon/pmbus/mpq8785.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Driver for MPS MPQ8785 Step-Down Converter
 */

#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include "pmbus.h"

static int mpq8785_identify(struct i2c_client *client,
			    struct pmbus_driver_info *info)
{
	int vout_mode;

	vout_mode = pmbus_read_byte_data(client, 0, PMBUS_VOUT_MODE);
	if (vout_mode < 0 || vout_mode == 0xff)
		return vout_mode < 0 ? vout_mode : -ENODEV;
	switch (vout_mode >> 5) {
	case 0:
		info->format[PSC_VOLTAGE_OUT] = linear;
		break;
	case 1:
	case 2:
		info->format[PSC_VOLTAGE_OUT] = direct,
		info->m[PSC_VOLTAGE_OUT] = 64;
		info->b[PSC_VOLTAGE_OUT] = 0;
		info->R[PSC_VOLTAGE_OUT] = 1;
		break;
	default:
		return -ENODEV;
	}

	return 0;
};

static struct pmbus_driver_info mpq8785_info = …;

static int mpq8785_probe(struct i2c_client *client)
{
	return pmbus_do_probe(client, &mpq8785_info);
};

static const struct i2c_device_id mpq8785_id[] = …;
MODULE_DEVICE_TABLE(i2c, mpq8785_id);

static const struct of_device_id __maybe_unused mpq8785_of_match[] = …;
MODULE_DEVICE_TABLE(of, mpq8785_of_match);

static struct i2c_driver mpq8785_driver = …;

module_i2c_driver(…) …;

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