// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Hardware monitoring driver for Maxim MAX34440/MAX34441
 *
 * Copyright (c) 2011 Ericsson AB.
 * Copyright (c) 2012 Guenter Roeck
 */

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

enum chips {
        adpm12160,
        adpm12200,
        max34440,
        max34441,
        max34446,
        max34451,
        max34460,
        max34461,
};

/*
 * Firmware is sometimes not ready if we try and read the
 * data from the page immediately after setting. Maxim
 * recommends 50us delay due to the chip failing to clock
 * stretch long enough here.
 */
#define MAX34440_PAGE_CHANGE_DELAY 50

#define MAX34440_MFR_VOUT_PEAK          0xd4
#define MAX34440_MFR_IOUT_PEAK          0xd5
#define MAX34440_MFR_TEMPERATURE_PEAK   0xd6
#define MAX34440_MFR_VOUT_MIN           0xd7

#define MAX34446_MFR_POUT_PEAK          0xe0
#define MAX34446_MFR_POUT_AVG           0xe1
#define MAX34446_MFR_IOUT_AVG           0xe2
#define MAX34446_MFR_TEMPERATURE_AVG    0xe3

#define MAX34440_STATUS_OC_WARN         BIT(0)
#define MAX34440_STATUS_OC_FAULT        BIT(1)
#define MAX34440_STATUS_OT_FAULT        BIT(5)
#define MAX34440_STATUS_OT_WARN         BIT(6)

/*
 * The whole max344* family have IOUT_OC_WARN_LIMIT and IOUT_OC_FAULT_LIMIT
 * swapped from the standard pmbus spec addresses.
 * For max34451, version MAX34451ETNA6+ and later has this issue fixed.
 */
#define MAX34440_IOUT_OC_WARN_LIMIT     0x46
#define MAX34440_IOUT_OC_FAULT_LIMIT    0x4A

#define MAX34451ETNA6_MFR_REV           0x0012

#define MAX34451_MFR_CHANNEL_CONFIG     0xe4
#define MAX34451_MFR_CHANNEL_CONFIG_SEL_MASK    0x3f

struct max34440_data {
        int id;
        struct pmbus_driver_info info;
        u8 iout_oc_warn_limit;
        u8 iout_oc_fault_limit;
};

#define to_max34440_data(x)  container_of(x, struct max34440_data, info)

static const struct i2c_device_id max34440_id[];

static int max34440_read_word_data(struct i2c_client *client, int page,
                                   int phase, int reg)
{
        int ret;
        const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
        const struct max34440_data *data = to_max34440_data(info);

        switch (reg) {
        case PMBUS_IOUT_OC_FAULT_LIMIT:
                ret = pmbus_read_word_data(client, page, phase,
                                           data->iout_oc_fault_limit);
                break;
        case PMBUS_IOUT_OC_WARN_LIMIT:
                ret = pmbus_read_word_data(client, page, phase,
                                           data->iout_oc_warn_limit);
                break;
        case PMBUS_VIRT_READ_VOUT_MIN:
                ret = pmbus_read_word_data(client, page, phase,
                                           MAX34440_MFR_VOUT_MIN);
                break;
        case PMBUS_VIRT_READ_VOUT_MAX:
                ret = pmbus_read_word_data(client, page, phase,
                                           MAX34440_MFR_VOUT_PEAK);
                break;
        case PMBUS_VIRT_READ_IOUT_AVG:
                if (data->id != max34446 && data->id != max34451 &&
                    data->id != adpm12160 && data->id != adpm12200)
                        return -ENXIO;
                ret = pmbus_read_word_data(client, page, phase,
                                           MAX34446_MFR_IOUT_AVG);
                break;
        case PMBUS_VIRT_READ_IOUT_MAX:
                ret = pmbus_read_word_data(client, page, phase,
                                           MAX34440_MFR_IOUT_PEAK);
                break;
        case PMBUS_VIRT_READ_POUT_AVG:
                if (data->id != max34446)
                        return -ENXIO;
                ret = pmbus_read_word_data(client, page, phase,
                                           MAX34446_MFR_POUT_AVG);
                break;
        case PMBUS_VIRT_READ_POUT_MAX:
                if (data->id != max34446)
                        return -ENXIO;
                ret = pmbus_read_word_data(client, page, phase,
                                           MAX34446_MFR_POUT_PEAK);
                break;
        case PMBUS_VIRT_READ_TEMP_AVG:
                if (data->id != max34446 && data->id != max34460 &&
                    data->id != max34461)
                        return -ENXIO;
                ret = pmbus_read_word_data(client, page, phase,
                                           MAX34446_MFR_TEMPERATURE_AVG);
                break;
        case PMBUS_VIRT_READ_TEMP_MAX:
                ret = pmbus_read_word_data(client, page, phase,
                                           MAX34440_MFR_TEMPERATURE_PEAK);
                break;
        case PMBUS_VIRT_RESET_POUT_HISTORY:
                if (data->id != max34446)
                        return -ENXIO;
                ret = 0;
                break;
        case PMBUS_VIRT_RESET_VOUT_HISTORY:
        case PMBUS_VIRT_RESET_IOUT_HISTORY:
        case PMBUS_VIRT_RESET_TEMP_HISTORY:
                ret = 0;
                break;
        default:
                ret = -ENODATA;
                break;
        }
        return ret;
}

static int max34440_write_word_data(struct i2c_client *client, int page,
                                    int reg, u16 word)
{
        const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
        const struct max34440_data *data = to_max34440_data(info);
        int ret;

        switch (reg) {
        case PMBUS_IOUT_OC_FAULT_LIMIT:
                ret = pmbus_write_word_data(client, page, data->iout_oc_fault_limit,
                                            word);
                break;
        case PMBUS_IOUT_OC_WARN_LIMIT:
                ret = pmbus_write_word_data(client, page, data->iout_oc_warn_limit,
                                            word);
                break;
        case PMBUS_VIRT_RESET_POUT_HISTORY:
                ret = pmbus_write_word_data(client, page,
                                            MAX34446_MFR_POUT_PEAK, 0);
                if (ret)
                        break;
                ret = pmbus_write_word_data(client, page,
                                            MAX34446_MFR_POUT_AVG, 0);
                break;
        case PMBUS_VIRT_RESET_VOUT_HISTORY:
                ret = pmbus_write_word_data(client, page,
                                            MAX34440_MFR_VOUT_MIN, 0x7fff);
                if (ret)
                        break;
                ret = pmbus_write_word_data(client, page,
                                            MAX34440_MFR_VOUT_PEAK, 0);
                break;
        case PMBUS_VIRT_RESET_IOUT_HISTORY:
                ret = pmbus_write_word_data(client, page,
                                            MAX34440_MFR_IOUT_PEAK, 0);
                if (!ret && (data->id == max34446 || data->id == max34451 ||
                             data->id == adpm12160 || data->id == adpm12200))
                        ret = pmbus_write_word_data(client, page,
                                        MAX34446_MFR_IOUT_AVG, 0);

                break;
        case PMBUS_VIRT_RESET_TEMP_HISTORY:
                ret = pmbus_write_word_data(client, page,
                                            MAX34440_MFR_TEMPERATURE_PEAK,
                                            0x8000);
                if (!ret && data->id == max34446)
                        ret = pmbus_write_word_data(client, page,
                                        MAX34446_MFR_TEMPERATURE_AVG, 0);
                break;
        default:
                ret = -ENODATA;
                break;
        }
        return ret;
}

static int max34440_read_byte_data(struct i2c_client *client, int page, int reg)
{
        int ret = 0;
        int mfg_status;

        if (page >= 0) {
                ret = pmbus_set_page(client, page, 0xff);
                if (ret < 0)
                        return ret;
        }

        switch (reg) {
        case PMBUS_STATUS_IOUT:
                mfg_status = pmbus_read_word_data(client, 0, 0xff,
                                                  PMBUS_STATUS_MFR_SPECIFIC);
                if (mfg_status < 0)
                        return mfg_status;
                if (mfg_status & MAX34440_STATUS_OC_WARN)
                        ret |= PB_IOUT_OC_WARNING;
                if (mfg_status & MAX34440_STATUS_OC_FAULT)
                        ret |= PB_IOUT_OC_FAULT;
                break;
        case PMBUS_STATUS_TEMPERATURE:
                mfg_status = pmbus_read_word_data(client, 0, 0xff,
                                                  PMBUS_STATUS_MFR_SPECIFIC);
                if (mfg_status < 0)
                        return mfg_status;
                if (mfg_status & MAX34440_STATUS_OT_WARN)
                        ret |= PB_TEMP_OT_WARNING;
                if (mfg_status & MAX34440_STATUS_OT_FAULT)
                        ret |= PB_TEMP_OT_FAULT;
                break;
        default:
                ret = -ENODATA;
                break;
        }
        return ret;
}

static int max34451_set_supported_funcs(struct i2c_client *client,
                                         struct max34440_data *data)
{
        /*
         * Each of the channel 0-15 can be configured to monitor the following
         * functions based on MFR_CHANNEL_CONFIG[5:0]
         * 0x10: Sequencing + voltage monitoring (only valid for PAGES 0–11)
         * 0x20: Voltage monitoring (no sequencing)
         * 0x21: Voltage read only
         * 0x22: Current monitoring
         * 0x23: Current read only
         * 0x30: General-purpose input active low
         * 0x34: General-purpose input active high
         * 0x00:  Disabled
         */

        int page, rv;
        bool max34451_na6 = false;

        rv = i2c_smbus_read_word_data(client, PMBUS_MFR_REVISION);
        if (rv < 0)
                return rv;

        if (rv >= MAX34451ETNA6_MFR_REV) {
                max34451_na6 = true;
                data->info.format[PSC_VOLTAGE_IN] = direct;
                data->info.format[PSC_CURRENT_IN] = direct;
                data->info.m[PSC_VOLTAGE_IN] = 1;
                data->info.b[PSC_VOLTAGE_IN] = 0;
                data->info.R[PSC_VOLTAGE_IN] = 3;
                data->info.m[PSC_CURRENT_IN] = 1;
                data->info.b[PSC_CURRENT_IN] = 0;
                data->info.R[PSC_CURRENT_IN] = 2;
                data->iout_oc_fault_limit = PMBUS_IOUT_OC_FAULT_LIMIT;
                data->iout_oc_warn_limit = PMBUS_IOUT_OC_WARN_LIMIT;
        }

        for (page = 0; page < 16; page++) {
                rv = i2c_smbus_write_byte_data(client, PMBUS_PAGE, page);
                fsleep(MAX34440_PAGE_CHANGE_DELAY);
                if (rv < 0)
                        return rv;

                rv = i2c_smbus_read_word_data(client,
                                              MAX34451_MFR_CHANNEL_CONFIG);
                if (rv < 0)
                        return rv;

                switch (rv & MAX34451_MFR_CHANNEL_CONFIG_SEL_MASK) {
                case 0x10:
                case 0x20:
                        data->info.func[page] = PMBUS_HAVE_VOUT |
                                PMBUS_HAVE_STATUS_VOUT;

                        if (max34451_na6)
                                data->info.func[page] |= PMBUS_HAVE_VIN |
                                        PMBUS_HAVE_STATUS_INPUT;
                        break;
                case 0x21:
                        data->info.func[page] = PMBUS_HAVE_VOUT;

                        if (max34451_na6)
                                data->info.func[page] |= PMBUS_HAVE_VIN;
                        break;
                case 0x22:
                        data->info.func[page] = PMBUS_HAVE_IOUT |
                                PMBUS_HAVE_STATUS_IOUT;

                        if (max34451_na6)
                                data->info.func[page] |= PMBUS_HAVE_IIN |
                                        PMBUS_HAVE_STATUS_INPUT;
                        break;
                case 0x23:
                        data->info.func[page] = PMBUS_HAVE_IOUT;

                        if (max34451_na6)
                                data->info.func[page] |= PMBUS_HAVE_IIN;
                        break;
                default:
                        break;
                }
        }

        return 0;
}

static struct pmbus_driver_info max34440_info[] = {
        [adpm12160] = {
                .pages = 19,
                .format[PSC_VOLTAGE_IN] = direct,
                .format[PSC_VOLTAGE_OUT] = direct,
                .format[PSC_CURRENT_IN] = direct,
                .format[PSC_CURRENT_OUT] = direct,
                .format[PSC_TEMPERATURE] = direct,
                .m[PSC_VOLTAGE_IN] = 125,
                .b[PSC_VOLTAGE_IN] = 0,
                .R[PSC_VOLTAGE_IN] = 0,
                .m[PSC_VOLTAGE_OUT] = 125,
                .b[PSC_VOLTAGE_OUT] = 0,
                .R[PSC_VOLTAGE_OUT] = 0,
                .m[PSC_CURRENT_IN] = 250,
                .b[PSC_CURRENT_IN] = 0,
                .R[PSC_CURRENT_IN] = -1,
                .m[PSC_CURRENT_OUT] = 250,
                .b[PSC_CURRENT_OUT] = 0,
                .R[PSC_CURRENT_OUT] = -1,
                .m[PSC_TEMPERATURE] = 1,
                .b[PSC_TEMPERATURE] = 0,
                .R[PSC_TEMPERATURE] = 2,
                /* absent func below [18] are not for monitoring */
                .func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
                .func[4] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
                .func[5] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
                .func[6] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
                .func[7] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
                .func[8] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
                .func[9] = PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT,
                .func[10] = PMBUS_HAVE_IIN | PMBUS_HAVE_STATUS_INPUT,
                .func[18] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
                .read_word_data = max34440_read_word_data,
                .write_word_data = max34440_write_word_data,
        },
        [adpm12200] = {
                .pages = 19,
                .format[PSC_VOLTAGE_IN] = direct,
                .format[PSC_VOLTAGE_OUT] = direct,
                .format[PSC_CURRENT_IN] = direct,
                .format[PSC_CURRENT_OUT] = direct,
                .format[PSC_TEMPERATURE] = direct,
                .m[PSC_VOLTAGE_IN] = 125,
                .b[PSC_VOLTAGE_IN] = 0,
                .R[PSC_VOLTAGE_IN] = 0,
                .m[PSC_VOLTAGE_OUT] = 125,
                .b[PSC_VOLTAGE_OUT] = 0,
                .R[PSC_VOLTAGE_OUT] = 0,
                .m[PSC_CURRENT_IN] = 250,
                .b[PSC_CURRENT_IN] = 0,
                .R[PSC_CURRENT_IN] = -1,
                .m[PSC_CURRENT_OUT] = 250,
                .b[PSC_CURRENT_OUT] = 0,
                .R[PSC_CURRENT_OUT] = -1,
                .m[PSC_TEMPERATURE] = 1,
                .b[PSC_TEMPERATURE] = 0,
                .R[PSC_TEMPERATURE] = 2,
                /* absent func below [18] are not for monitoring */
                .func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
                .func[4] = PMBUS_HAVE_STATUS_IOUT,
                .func[5] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
                .func[6] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
                .func[7] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
                .func[8] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
                .func[9] = PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT,
                .func[10] = PMBUS_HAVE_IIN | PMBUS_HAVE_STATUS_INPUT,
                .func[14] = PMBUS_HAVE_IOUT,
                .func[18] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
                .read_word_data = max34440_read_word_data,
                .write_word_data = max34440_write_word_data,
        },
        [max34440] = {
                .pages = 14,
                .format[PSC_VOLTAGE_IN] = direct,
                .format[PSC_VOLTAGE_OUT] = direct,
                .format[PSC_TEMPERATURE] = direct,
                .format[PSC_CURRENT_OUT] = direct,
                .m[PSC_VOLTAGE_IN] = 1,
                .b[PSC_VOLTAGE_IN] = 0,
                .R[PSC_VOLTAGE_IN] = 3,     /* R = 0 in datasheet reflects mV */
                .m[PSC_VOLTAGE_OUT] = 1,
                .b[PSC_VOLTAGE_OUT] = 0,
                .R[PSC_VOLTAGE_OUT] = 3,    /* R = 0 in datasheet reflects mV */
                .m[PSC_CURRENT_OUT] = 1,
                .b[PSC_CURRENT_OUT] = 0,
                .R[PSC_CURRENT_OUT] = 3,    /* R = 0 in datasheet reflects mA */
                .m[PSC_TEMPERATURE] = 1,
                .b[PSC_TEMPERATURE] = 0,
                .R[PSC_TEMPERATURE] = 2,
                .func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
                  | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
                .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
                  | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
                .func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
                  | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
                .func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
                  | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
                .func[4] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
                  | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
                .func[5] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
                  | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
                .func[6] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
                .func[7] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
                .func[8] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
                .func[9] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
                .func[10] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
                .func[11] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
                .func[12] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
                .func[13] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
                .read_byte_data = max34440_read_byte_data,
                .read_word_data = max34440_read_word_data,
                .write_word_data = max34440_write_word_data,
                .page_change_delay = MAX34440_PAGE_CHANGE_DELAY,
        },
        [max34441] = {
                .pages = 12,
                .format[PSC_VOLTAGE_IN] = direct,
                .format[PSC_VOLTAGE_OUT] = direct,
                .format[PSC_TEMPERATURE] = direct,
                .format[PSC_CURRENT_OUT] = direct,
                .format[PSC_FAN] = direct,
                .m[PSC_VOLTAGE_IN] = 1,
                .b[PSC_VOLTAGE_IN] = 0,
                .R[PSC_VOLTAGE_IN] = 3,
                .m[PSC_VOLTAGE_OUT] = 1,
                .b[PSC_VOLTAGE_OUT] = 0,
                .R[PSC_VOLTAGE_OUT] = 3,
                .m[PSC_CURRENT_OUT] = 1,
                .b[PSC_CURRENT_OUT] = 0,
                .R[PSC_CURRENT_OUT] = 3,
                .m[PSC_TEMPERATURE] = 1,
                .b[PSC_TEMPERATURE] = 0,
                .R[PSC_TEMPERATURE] = 2,
                .m[PSC_FAN] = 1,
                .b[PSC_FAN] = 0,
                .R[PSC_FAN] = 0,
                .func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
                  | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
                .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
                  | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
                .func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
                  | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
                .func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
                  | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
                .func[4] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
                  | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
                .func[5] = PMBUS_HAVE_FAN12 | PMBUS_HAVE_STATUS_FAN12,
                .func[6] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
                .func[7] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
                .func[8] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
                .func[9] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
                .func[10] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
                .func[11] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
                .read_byte_data = max34440_read_byte_data,
                .read_word_data = max34440_read_word_data,
                .write_word_data = max34440_write_word_data,
                .page_change_delay = MAX34440_PAGE_CHANGE_DELAY,
        },
        [max34446] = {
                .pages = 7,
                .format[PSC_VOLTAGE_IN] = direct,
                .format[PSC_VOLTAGE_OUT] = direct,
                .format[PSC_TEMPERATURE] = direct,
                .format[PSC_CURRENT_OUT] = direct,
                .format[PSC_POWER] = direct,
                .m[PSC_VOLTAGE_IN] = 1,
                .b[PSC_VOLTAGE_IN] = 0,
                .R[PSC_VOLTAGE_IN] = 3,
                .m[PSC_VOLTAGE_OUT] = 1,
                .b[PSC_VOLTAGE_OUT] = 0,
                .R[PSC_VOLTAGE_OUT] = 3,
                .m[PSC_CURRENT_OUT] = 1,
                .b[PSC_CURRENT_OUT] = 0,
                .R[PSC_CURRENT_OUT] = 3,
                .m[PSC_POWER] = 1,
                .b[PSC_POWER] = 0,
                .R[PSC_POWER] = 3,
                .m[PSC_TEMPERATURE] = 1,
                .b[PSC_TEMPERATURE] = 0,
                .R[PSC_TEMPERATURE] = 2,
                .func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
                  | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_POUT,
                .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
                  | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
                .func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
                  | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_POUT,
                .func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
                  | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
                .func[4] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
                .func[5] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
                .func[6] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
                .read_byte_data = max34440_read_byte_data,
                .read_word_data = max34440_read_word_data,
                .write_word_data = max34440_write_word_data,
                .page_change_delay = MAX34440_PAGE_CHANGE_DELAY,
        },
        [max34451] = {
                .pages = 21,
                .format[PSC_VOLTAGE_OUT] = direct,
                .format[PSC_TEMPERATURE] = direct,
                .format[PSC_CURRENT_OUT] = direct,
                .m[PSC_VOLTAGE_OUT] = 1,
                .b[PSC_VOLTAGE_OUT] = 0,
                .R[PSC_VOLTAGE_OUT] = 3,
                .m[PSC_CURRENT_OUT] = 1,
                .b[PSC_CURRENT_OUT] = 0,
                .R[PSC_CURRENT_OUT] = 2,
                .m[PSC_TEMPERATURE] = 1,
                .b[PSC_TEMPERATURE] = 0,
                .R[PSC_TEMPERATURE] = 2,
                /* func 0-15 is set dynamically before probing */
                .func[16] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
                .func[17] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
                .func[18] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
                .func[19] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
                .func[20] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
                .read_word_data = max34440_read_word_data,
                .write_word_data = max34440_write_word_data,
                .page_change_delay = MAX34440_PAGE_CHANGE_DELAY,
        },
        [max34460] = {
                .pages = 18,
                .format[PSC_VOLTAGE_OUT] = direct,
                .format[PSC_TEMPERATURE] = direct,
                .m[PSC_VOLTAGE_OUT] = 1,
                .b[PSC_VOLTAGE_OUT] = 0,
                .R[PSC_VOLTAGE_OUT] = 3,
                .m[PSC_TEMPERATURE] = 1,
                .b[PSC_TEMPERATURE] = 0,
                .R[PSC_TEMPERATURE] = 2,
                .func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
                .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
                .func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
                .func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
                .func[4] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
                .func[5] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
                .func[6] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
                .func[7] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
                .func[8] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
                .func[9] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
                .func[10] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
                .func[11] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
                .func[13] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
                .func[14] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
                .func[15] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
                .func[16] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
                .func[17] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
                .read_word_data = max34440_read_word_data,
                .write_word_data = max34440_write_word_data,
                .page_change_delay = MAX34440_PAGE_CHANGE_DELAY,
        },
        [max34461] = {
                .pages = 23,
                .format[PSC_VOLTAGE_OUT] = direct,
                .format[PSC_TEMPERATURE] = direct,
                .m[PSC_VOLTAGE_OUT] = 1,
                .b[PSC_VOLTAGE_OUT] = 0,
                .R[PSC_VOLTAGE_OUT] = 3,
                .m[PSC_TEMPERATURE] = 1,
                .b[PSC_TEMPERATURE] = 0,
                .R[PSC_TEMPERATURE] = 2,
                .func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
                .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
                .func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
                .func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
                .func[4] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
                .func[5] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
                .func[6] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
                .func[7] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
                .func[8] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
                .func[9] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
                .func[10] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
                .func[11] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
                .func[12] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
                .func[13] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
                .func[14] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
                .func[15] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
                /* page 16 is reserved */
                .func[17] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
                .func[18] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
                .func[19] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
                .func[20] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
                .func[21] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
                .read_word_data = max34440_read_word_data,
                .write_word_data = max34440_write_word_data,
                .page_change_delay = MAX34440_PAGE_CHANGE_DELAY,
        },
};

static int max34440_probe(struct i2c_client *client)
{
        struct max34440_data *data;
        int rv;

        data = devm_kzalloc(&client->dev, sizeof(struct max34440_data),
                            GFP_KERNEL);
        if (!data)
                return -ENOMEM;
        data->id = i2c_match_id(max34440_id, client)->driver_data;
        data->info = max34440_info[data->id];
        data->iout_oc_fault_limit = MAX34440_IOUT_OC_FAULT_LIMIT;
        data->iout_oc_warn_limit = MAX34440_IOUT_OC_WARN_LIMIT;

        if (data->id == max34451) {
                rv = max34451_set_supported_funcs(client, data);
                if (rv)
                        return rv;
        } else if (data->id == adpm12160 || data->id == adpm12200) {
                data->iout_oc_fault_limit = PMBUS_IOUT_OC_FAULT_LIMIT;
                data->iout_oc_warn_limit = PMBUS_IOUT_OC_WARN_LIMIT;
        }

        return pmbus_do_probe(client, &data->info);
}

static const struct i2c_device_id max34440_id[] = {
        {"adpm12160", adpm12160},
        {"adpm12200", adpm12200},
        {"max34440", max34440},
        {"max34441", max34441},
        {"max34446", max34446},
        {"max34451", max34451},
        {"max34460", max34460},
        {"max34461", max34461},
        {}
};
MODULE_DEVICE_TABLE(i2c, max34440_id);

/* This is the driver that will be inserted */
static struct i2c_driver max34440_driver = {
        .driver = {
                   .name = "max34440",
                   },
        .probe = max34440_probe,
        .id_table = max34440_id,
};

module_i2c_driver(max34440_driver);

MODULE_AUTHOR("Guenter Roeck");
MODULE_DESCRIPTION("PMBus driver for Maxim MAX34440/MAX34441");
MODULE_LICENSE("GPL");
MODULE_IMPORT_NS("PMBUS");