// SPDX-License-Identifier: GPL-2.0+
/*
 * Hardware monitoring driver for STMicroelectronics digital controller PM6764TR
 */

#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pmbus.h>
#include "pmbus.h"

#define PM6764TR_PMBUS_READ_VOUT        0xD4

static int pm6764tr_read_word_data(struct i2c_client *client, int page, int phase, int reg)
{
        int ret;

        switch (reg) {
        case PMBUS_VIRT_READ_VMON:
                ret = pmbus_read_word_data(client, page, phase, PM6764TR_PMBUS_READ_VOUT);
                break;
        default:
                ret = -ENODATA;
                break;
        }
        return ret;
}

static struct pmbus_driver_info pm6764tr_info = {
        .pages = 1,
        .format[PSC_VOLTAGE_IN] = linear,
        .format[PSC_VOLTAGE_OUT] = vid,
        .format[PSC_TEMPERATURE] = linear,
        .format[PSC_CURRENT_OUT] = linear,
        .format[PSC_POWER] = linear,
        .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN |  PMBUS_HAVE_PIN |
            PMBUS_HAVE_IOUT | PMBUS_HAVE_POUT | PMBUS_HAVE_VMON |
                PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_VOUT |
                PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
        .read_word_data = pm6764tr_read_word_data,
};

static int pm6764tr_probe(struct i2c_client *client)
{
        return pmbus_do_probe(client, &pm6764tr_info);
}

static const struct i2c_device_id pm6764tr_id[] = {
        {"pm6764tr"},
        {}
};
MODULE_DEVICE_TABLE(i2c, pm6764tr_id);

static const struct of_device_id __maybe_unused pm6764tr_of_match[] = {
        {.compatible = "st,pm6764tr"},
        {}
};

/* This is the driver that will be inserted */
static struct i2c_driver pm6764tr_driver = {
        .driver = {
                   .name = "pm6764tr",
                   .of_match_table = of_match_ptr(pm6764tr_of_match),
                   },
        .probe = pm6764tr_probe,
        .id_table = pm6764tr_id,
};

module_i2c_driver(pm6764tr_driver);

MODULE_AUTHOR("Charles Hsu");
MODULE_DESCRIPTION("PMBus driver for  ST PM6764TR");
MODULE_LICENSE("GPL");
MODULE_IMPORT_NS("PMBUS");