// SPDX-License-Identifier: GPL-2.0
/*
 * Intel MAX 10 BMC HWMON Driver
 *
 * Copyright (C) 2018-2020 Intel Corporation. All rights reserved.
 *
 */
#include <linux/device.h>
#include <linux/hwmon.h>
#include <linux/mfd/intel-m10-bmc.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/platform_device.h>

struct m10bmc_sdata {
        unsigned int reg_input;
        unsigned int reg_max;
        unsigned int reg_crit;
        unsigned int reg_hyst;
        unsigned int reg_min;
        unsigned int multiplier;
        const char *label;
};

struct m10bmc_hwmon_board_data {
        const struct m10bmc_sdata *tables[hwmon_max];
        const struct hwmon_channel_info **hinfo;
};

struct m10bmc_hwmon {
        struct device *dev;
        struct hwmon_chip_info chip;
        char *hw_name;
        struct intel_m10bmc *m10bmc;
        const struct m10bmc_hwmon_board_data *bdata;
};

static const struct m10bmc_sdata n3000bmc_temp_tbl[] = {
        { 0x100, 0x104, 0x108, 0x10c, 0x0, 500, "Board Temperature" },
        { 0x110, 0x114, 0x118, 0x0, 0x0, 500, "FPGA Die Temperature" },
        { 0x11c, 0x124, 0x120, 0x0, 0x0, 500, "QSFP0 Temperature" },
        { 0x12c, 0x134, 0x130, 0x0, 0x0, 500, "QSFP1 Temperature" },
        { 0x168, 0x0, 0x0, 0x0, 0x0, 500, "Retimer A Temperature" },
        { 0x16c, 0x0, 0x0, 0x0, 0x0, 500, "Retimer A SerDes Temperature" },
        { 0x170, 0x0, 0x0, 0x0, 0x0, 500, "Retimer B Temperature" },
        { 0x174, 0x0, 0x0, 0x0, 0x0, 500, "Retimer B SerDes Temperature" },
};

static const struct m10bmc_sdata n3000bmc_in_tbl[] = {
        { 0x128, 0x0, 0x0, 0x0, 0x0, 1, "QSFP0 Supply Voltage" },
        { 0x138, 0x0, 0x0, 0x0, 0x0, 1, "QSFP1 Supply Voltage" },
        { 0x13c, 0x0, 0x0, 0x0, 0x0, 1, "FPGA Core Voltage" },
        { 0x144, 0x0, 0x0, 0x0, 0x0, 1, "12V Backplane Voltage" },
        { 0x14c, 0x0, 0x0, 0x0, 0x0, 1, "1.2V Voltage" },
        { 0x150, 0x0, 0x0, 0x0, 0x0, 1, "12V AUX Voltage" },
        { 0x158, 0x0, 0x0, 0x0, 0x0, 1, "1.8V Voltage" },
        { 0x15c, 0x0, 0x0, 0x0, 0x0, 1, "3.3V Voltage" },
};

static const struct m10bmc_sdata n3000bmc_curr_tbl[] = {
        { 0x140, 0x0, 0x0, 0x0, 0x0, 1, "FPGA Core Current" },
        { 0x148, 0x0, 0x0, 0x0, 0x0, 1, "12V Backplane Current" },
        { 0x154, 0x0, 0x0, 0x0, 0x0, 1, "12V AUX Current" },
};

static const struct m10bmc_sdata n3000bmc_power_tbl[] = {
        { 0x160, 0x0, 0x0, 0x0, 0x0, 1000, "Board Power" },
};

static const struct hwmon_channel_info *n3000bmc_hinfo[] = {
        HWMON_CHANNEL_INFO(temp,
                           HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST |
                           HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
                           HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
                           HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
                           HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_LABEL),
        HWMON_CHANNEL_INFO(in,
                           HWMON_I_INPUT | HWMON_I_LABEL,
                           HWMON_I_INPUT | HWMON_I_LABEL,
                           HWMON_I_INPUT | HWMON_I_LABEL,
                           HWMON_I_INPUT | HWMON_I_LABEL,
                           HWMON_I_INPUT | HWMON_I_LABEL,
                           HWMON_I_INPUT | HWMON_I_LABEL,
                           HWMON_I_INPUT | HWMON_I_LABEL,
                           HWMON_I_INPUT | HWMON_I_LABEL),
        HWMON_CHANNEL_INFO(curr,
                           HWMON_C_INPUT | HWMON_C_LABEL,
                           HWMON_C_INPUT | HWMON_C_LABEL,
                           HWMON_C_INPUT | HWMON_C_LABEL),
        HWMON_CHANNEL_INFO(power,
                           HWMON_P_INPUT | HWMON_P_LABEL),
        NULL
};

static const struct m10bmc_sdata d5005bmc_temp_tbl[] = {
        { 0x100, 0x104, 0x108, 0x10c, 0x0, 500, "Board Inlet Air Temperature" },
        { 0x110, 0x114, 0x118, 0x0, 0x0, 500, "FPGA Core Temperature" },
        { 0x11c, 0x120, 0x124, 0x128, 0x0, 500, "Board Exhaust Air Temperature" },
        { 0x12c, 0x130, 0x134, 0x0, 0x0, 500, "FPGA Transceiver Temperature" },
        { 0x138, 0x13c, 0x140, 0x144, 0x0, 500, "RDIMM0 Temperature" },
        { 0x148, 0x14c, 0x150, 0x154, 0x0, 500, "RDIMM1 Temperature" },
        { 0x158, 0x15c, 0x160, 0x164, 0x0, 500, "RDIMM2 Temperature" },
        { 0x168, 0x16c, 0x170, 0x174, 0x0, 500, "RDIMM3 Temperature" },
        { 0x178, 0x17c, 0x180, 0x0, 0x0, 500, "QSFP0 Temperature" },
        { 0x188, 0x18c, 0x190, 0x0, 0x0, 500, "QSFP1 Temperature" },
        { 0x1a0, 0x1a4, 0x1a8, 0x0, 0x0, 500, "3.3v Temperature" },
        { 0x1bc, 0x1c0, 0x1c4, 0x0, 0x0, 500, "VCCERAM Temperature" },
        { 0x1d8, 0x1dc, 0x1e0, 0x0, 0x0, 500, "VCCR Temperature" },
        { 0x1f4, 0x1f8, 0x1fc, 0x0, 0x0, 500, "VCCT Temperature" },
        { 0x210, 0x214, 0x218, 0x0, 0x0, 500, "1.8v Temperature" },
        { 0x22c, 0x230, 0x234, 0x0, 0x0, 500, "12v Backplane Temperature" },
        { 0x248, 0x24c, 0x250, 0x0, 0x0, 500, "12v AUX Temperature" },
};

static const struct m10bmc_sdata d5005bmc_in_tbl[] = {
        { 0x184, 0x0, 0x0, 0x0, 0x0, 1, "QSFP0 Supply Voltage" },
        { 0x194, 0x0, 0x0, 0x0, 0x0, 1, "QSFP1 Supply Voltage" },
        { 0x198, 0x0, 0x0, 0x0, 0x0, 1, "FPGA Core Voltage" },
        { 0x1ac, 0x1b0, 0x1b4, 0x0, 0x0, 1, "3.3v Voltage" },
        { 0x1c8, 0x1cc, 0x1d0, 0x0, 0x0, 1, "VCCERAM Voltage" },
        { 0x1e4, 0x1e8, 0x1ec, 0x0, 0x0, 1, "VCCR Voltage" },
        { 0x200, 0x204, 0x208, 0x0, 0x0, 1, "VCCT Voltage" },
        { 0x21c, 0x220, 0x224, 0x0, 0x0, 1, "1.8v Voltage" },
        { 0x238, 0x0, 0x0, 0x0, 0x23c, 1, "12v Backplane Voltage" },
        { 0x254, 0x0, 0x0, 0x0, 0x258, 1, "12v AUX Voltage" },
};

static const struct m10bmc_sdata d5005bmc_curr_tbl[] = {
        { 0x19c, 0x0, 0x0, 0x0, 0x0, 1, "FPGA Core Current" },
        { 0x1b8, 0x0, 0x0, 0x0, 0x0, 1, "3.3v Current" },
        { 0x1d4, 0x0, 0x0, 0x0, 0x0, 1, "VCCERAM Current" },
        { 0x1f0, 0x0, 0x0, 0x0, 0x0, 1, "VCCR Current" },
        { 0x20c, 0x0, 0x0, 0x0, 0x0, 1, "VCCT Current" },
        { 0x228, 0x0, 0x0, 0x0, 0x0, 1, "1.8v Current" },
        { 0x240, 0x244, 0x0, 0x0, 0x0, 1, "12v Backplane Current" },
        { 0x25c, 0x260, 0x0, 0x0, 0x0, 1, "12v AUX Current" },
};

static const struct m10bmc_hwmon_board_data n3000bmc_hwmon_bdata = {
        .tables = {
                [hwmon_temp] = n3000bmc_temp_tbl,
                [hwmon_in] = n3000bmc_in_tbl,
                [hwmon_curr] = n3000bmc_curr_tbl,
                [hwmon_power] = n3000bmc_power_tbl,
        },

        .hinfo = n3000bmc_hinfo,
};

static const struct hwmon_channel_info *d5005bmc_hinfo[] = {
        HWMON_CHANNEL_INFO(temp,
                           HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST |
                           HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
                           HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST |
                           HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
                           HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST |
                           HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST |
                           HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST |
                           HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST |
                           HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
                           HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
                           HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
                           HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
                           HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
                           HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
                           HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
                           HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
                           HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
                           HWMON_T_LABEL),
        HWMON_CHANNEL_INFO(in,
                           HWMON_I_INPUT | HWMON_I_LABEL,
                           HWMON_I_INPUT | HWMON_I_LABEL,
                           HWMON_I_INPUT | HWMON_I_LABEL,
                           HWMON_I_INPUT | HWMON_I_MAX | HWMON_I_CRIT |
                           HWMON_I_LABEL,
                           HWMON_I_INPUT | HWMON_I_MAX | HWMON_I_CRIT |
                           HWMON_I_LABEL,
                           HWMON_I_INPUT | HWMON_I_MAX | HWMON_I_CRIT |
                           HWMON_I_LABEL,
                           HWMON_I_INPUT | HWMON_I_MAX | HWMON_I_CRIT |
                           HWMON_I_LABEL,
                           HWMON_I_INPUT | HWMON_I_MAX | HWMON_I_CRIT |
                           HWMON_I_LABEL,
                           HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_LABEL,
                           HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_LABEL),
        HWMON_CHANNEL_INFO(curr,
                           HWMON_C_INPUT | HWMON_C_LABEL,
                           HWMON_C_INPUT | HWMON_C_LABEL,
                           HWMON_C_INPUT | HWMON_C_LABEL,
                           HWMON_C_INPUT | HWMON_C_LABEL,
                           HWMON_C_INPUT | HWMON_C_LABEL,
                           HWMON_C_INPUT | HWMON_C_LABEL,
                           HWMON_C_INPUT | HWMON_C_MAX | HWMON_C_LABEL,
                           HWMON_C_INPUT | HWMON_C_MAX | HWMON_C_LABEL),
        NULL
};

static const struct m10bmc_hwmon_board_data d5005bmc_hwmon_bdata = {
        .tables = {
                [hwmon_temp] = d5005bmc_temp_tbl,
                [hwmon_in] = d5005bmc_in_tbl,
                [hwmon_curr] = d5005bmc_curr_tbl,
        },

        .hinfo = d5005bmc_hinfo,
};

static const struct m10bmc_sdata n5010bmc_temp_tbl[] = {
        { 0x100, 0x0, 0x104, 0x0, 0x0, 1000, "Board Local Temperature" },
        { 0x108, 0x0, 0x10c, 0x0, 0x0, 1000, "FPGA 1 Temperature" },
        { 0x110, 0x0, 0x114, 0x0, 0x0, 1000, "FPGA 2 Temperature" },
        { 0x118, 0x0, 0x0, 0x0, 0x0, 1000, "Card Top Temperature" },
        { 0x11c, 0x0, 0x0, 0x0, 0x0, 1000, "Card Bottom Temperature" },
        { 0x128, 0x0, 0x0, 0x0, 0x0, 1000, "FPGA 1.2V Temperature" },
        { 0x134, 0x0, 0x0, 0x0, 0x0, 1000, "FPGA 5V Temperature" },
        { 0x140, 0x0, 0x0, 0x0, 0x0, 1000, "FPGA 0.9V Temperature" },
        { 0x14c, 0x0, 0x0, 0x0, 0x0, 1000, "FPGA 0.85V Temperature" },
        { 0x158, 0x0, 0x0, 0x0, 0x0, 1000, "AUX 12V Temperature" },
        { 0x164, 0x0, 0x0, 0x0, 0x0, 1000, "Backplane 12V Temperature" },
        { 0x1a8, 0x0, 0x0, 0x0, 0x0, 1000, "QSFP28-1 Temperature" },
        { 0x1ac, 0x0, 0x0, 0x0, 0x0, 1000, "QSFP28-2 Temperature" },
        { 0x1b0, 0x0, 0x0, 0x0, 0x0, 1000, "QSFP28-3 Temperature" },
        { 0x1b4, 0x0, 0x0, 0x0, 0x0, 1000, "QSFP28-4 Temperature" },
        { 0x1b8, 0x0, 0x0, 0x0, 0x0, 1000, "CVL1 Internal Temperature" },
        { 0x1bc, 0x0, 0x0, 0x0, 0x0, 1000, "CVL2 Internal Temperature" },
};

static const struct m10bmc_sdata n5010bmc_in_tbl[] = {
        { 0x120, 0x0, 0x0, 0x0, 0x0, 1, "FPGA 1.2V Voltage" },
        { 0x12c, 0x0, 0x0, 0x0, 0x0, 1, "FPGA 5V Voltage" },
        { 0x138, 0x0, 0x0, 0x0, 0x0, 1, "FPGA 0.9V Voltage" },
        { 0x144, 0x0, 0x0, 0x0, 0x0, 1, "FPGA 0.85V Voltage" },
        { 0x150, 0x0, 0x0, 0x0, 0x0, 1, "AUX 12V Voltage" },
        { 0x15c, 0x0, 0x0, 0x0, 0x0, 1, "Backplane 12V Voltage" },
        { 0x16c, 0x0, 0x0, 0x0, 0x0, 1, "DDR4 1.2V Voltage" },
        { 0x17c, 0x0, 0x0, 0x0, 0x0, 1, "FPGA 1.8V Voltage" },
        { 0x184, 0x0, 0x0, 0x0, 0x0, 1, "QDR 1.3V Voltage" },
        { 0x18c, 0x0, 0x0, 0x0, 0x0, 1, "CVL1 0.8V Voltage" },
        { 0x194, 0x0, 0x0, 0x0, 0x0, 1, "CVL1 1.05V Voltage" },
        { 0x19c, 0x0, 0x0, 0x0, 0x0, 1, "CVL2 1.05V Voltage" },
        { 0x1a4, 0x0, 0x0, 0x0, 0x0, 1, "CVL2 0.8V Voltage" },
};

static const struct m10bmc_sdata n5010bmc_curr_tbl[] = {
        { 0x124, 0x0, 0x0, 0x0, 0x0, 1, "FPGA 1.2V Current" },
        { 0x130, 0x0, 0x0, 0x0, 0x0, 1, "FPGA 5V Current" },
        { 0x13c, 0x0, 0x0, 0x0, 0x0, 1, "FPGA 0.9V Current" },
        { 0x148, 0x0, 0x0, 0x0, 0x0, 1, "FPGA 0.85V Current" },
        { 0x154, 0x0, 0x0, 0x0, 0x0, 1, "AUX 12V Current" },
        { 0x160, 0x0, 0x0, 0x0, 0x0, 1, "Backplane 12V Current" },
        { 0x168, 0x0, 0x0, 0x0, 0x0, 1, "DDR4 1.2V Current" },
        { 0x178, 0x0, 0x0, 0x0, 0x0, 1, "FPGA 1.8V Current" },
        { 0x180, 0x0, 0x0, 0x0, 0x0, 1, "QDR 1.3V Current" },
        { 0x188, 0x0, 0x0, 0x0, 0x0, 1, "CVL1 0.8V Current" },
        { 0x190, 0x0, 0x0, 0x0, 0x0, 1, "CVL1 1.05V Current" },
        { 0x198, 0x0, 0x0, 0x0, 0x0, 1, "CVL2 1.05V Current" },
        { 0x1a0, 0x0, 0x0, 0x0, 0x0, 1, "CVL2 0.8V Current" },
};

static const struct hwmon_channel_info *n5010bmc_hinfo[] = {
        HWMON_CHANNEL_INFO(temp,
                           HWMON_T_INPUT | HWMON_T_CRIT | HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_CRIT | HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_CRIT | HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_LABEL,
                           HWMON_T_INPUT | HWMON_T_LABEL),
        HWMON_CHANNEL_INFO(in,
                           HWMON_I_INPUT | HWMON_I_LABEL,
                           HWMON_I_INPUT | HWMON_I_LABEL,
                           HWMON_I_INPUT | HWMON_I_LABEL,
                           HWMON_I_INPUT | HWMON_I_LABEL,
                           HWMON_I_INPUT | HWMON_I_LABEL,
                           HWMON_I_INPUT | HWMON_I_LABEL,
                           HWMON_I_INPUT | HWMON_I_LABEL,
                           HWMON_I_INPUT | HWMON_I_LABEL,
                           HWMON_I_INPUT | HWMON_I_LABEL,
                           HWMON_I_INPUT | HWMON_I_LABEL,
                           HWMON_I_INPUT | HWMON_I_LABEL,
                           HWMON_I_INPUT | HWMON_I_LABEL,
                           HWMON_I_INPUT | HWMON_I_LABEL),
        HWMON_CHANNEL_INFO(curr,
                           HWMON_C_INPUT | HWMON_C_LABEL,
                           HWMON_C_INPUT | HWMON_C_LABEL,
                           HWMON_C_INPUT | HWMON_C_LABEL,
                           HWMON_C_INPUT | HWMON_C_LABEL,
                           HWMON_C_INPUT | HWMON_C_LABEL,
                           HWMON_C_INPUT | HWMON_C_LABEL,
                           HWMON_C_INPUT | HWMON_C_LABEL,
                           HWMON_C_INPUT | HWMON_C_LABEL,
                           HWMON_C_INPUT | HWMON_C_LABEL,
                           HWMON_C_INPUT | HWMON_C_LABEL,
                           HWMON_C_INPUT | HWMON_C_LABEL,
                           HWMON_C_INPUT | HWMON_C_LABEL,
                           HWMON_C_INPUT | HWMON_C_LABEL),
        NULL
};

static const struct m10bmc_hwmon_board_data n5010bmc_hwmon_bdata = {
        .tables = {
                [hwmon_temp] = n5010bmc_temp_tbl,
                [hwmon_in] = n5010bmc_in_tbl,
                [hwmon_curr] = n5010bmc_curr_tbl,
        },

        .hinfo = n5010bmc_hinfo,
};

static umode_t
m10bmc_hwmon_is_visible(const void *data, enum hwmon_sensor_types type,
                        u32 attr, int channel)
{
        return 0444;
}

static const struct m10bmc_sdata *
find_sensor_data(struct m10bmc_hwmon *hw, enum hwmon_sensor_types type,
                 int channel)
{
        const struct m10bmc_sdata *tbl;

        tbl = hw->bdata->tables[type];
        if (!tbl)
                return ERR_PTR(-EOPNOTSUPP);

        return &tbl[channel];
}

static int do_sensor_read(struct m10bmc_hwmon *hw,
                          const struct m10bmc_sdata *data,
                          unsigned int regoff, long *val)
{
        unsigned int regval;
        int ret;

        ret = m10bmc_sys_read(hw->m10bmc, regoff, &regval);
        if (ret)
                return ret;

        /*
         * BMC Firmware will return 0xdeadbeef if the sensor value is invalid
         * at that time. This usually happens on sensor channels which connect
         * to external pluggable modules, e.g. QSFP temperature and voltage.
         * When the QSFP is unplugged from cage, driver will get 0xdeadbeef
         * from their registers.
         */
        if (regval == 0xdeadbeef)
                return -ENODATA;

        *val = regval * data->multiplier;

        return 0;
}

static int m10bmc_hwmon_read(struct device *dev, enum hwmon_sensor_types type,
                             u32 attr, int channel, long *val)
{
        struct m10bmc_hwmon *hw = dev_get_drvdata(dev);
        unsigned int reg = 0, reg_hyst = 0;
        const struct m10bmc_sdata *data;
        long hyst, value;
        int ret;

        data = find_sensor_data(hw, type, channel);
        if (IS_ERR(data))
                return PTR_ERR(data);

        switch (type) {
        case hwmon_temp:
                switch (attr) {
                case hwmon_temp_input:
                        reg = data->reg_input;
                        break;
                case hwmon_temp_max_hyst:
                        reg_hyst = data->reg_hyst;
                        fallthrough;
                case hwmon_temp_max:
                        reg = data->reg_max;
                        break;
                case hwmon_temp_crit_hyst:
                        reg_hyst = data->reg_hyst;
                        fallthrough;
                case hwmon_temp_crit:
                        reg = data->reg_crit;
                        break;
                default:
                        return -EOPNOTSUPP;
                }
                break;
        case hwmon_in:
                switch (attr) {
                case hwmon_in_input:
                        reg = data->reg_input;
                        break;
                case hwmon_in_max:
                        reg = data->reg_max;
                        break;
                case hwmon_in_crit:
                        reg = data->reg_crit;
                        break;
                case hwmon_in_min:
                        reg = data->reg_min;
                        break;
                default:
                        return -EOPNOTSUPP;
                }
                break;
        case hwmon_curr:
                switch (attr) {
                case hwmon_curr_input:
                        reg = data->reg_input;
                        break;
                case hwmon_curr_max:
                        reg = data->reg_max;
                        break;
                case hwmon_curr_crit:
                        reg = data->reg_crit;
                        break;
                default:
                        return -EOPNOTSUPP;
                }
                break;
        case hwmon_power:
                switch (attr) {
                case hwmon_power_input:
                        reg = data->reg_input;
                        break;
                default:
                        return -EOPNOTSUPP;
                }
                break;
        default:
                return -EOPNOTSUPP;
        }

        if (!reg)
                return -EOPNOTSUPP;

        ret = do_sensor_read(hw, data, reg, &value);
        if (ret)
                return ret;

        if (reg_hyst) {
                ret = do_sensor_read(hw, data, reg_hyst, &hyst);
                if (ret)
                        return ret;

                value -= hyst;
        }

        *val = value;

        return 0;
}

static int m10bmc_hwmon_read_string(struct device *dev,
                                    enum hwmon_sensor_types type,
                                    u32 attr, int channel, const char **str)
{
        struct m10bmc_hwmon *hw = dev_get_drvdata(dev);
        const struct m10bmc_sdata *data;

        data = find_sensor_data(hw, type, channel);
        if (IS_ERR(data))
                return PTR_ERR(data);

        *str = data->label;

        return 0;
}

static const struct hwmon_ops m10bmc_hwmon_ops = {
        .is_visible = m10bmc_hwmon_is_visible,
        .read = m10bmc_hwmon_read,
        .read_string = m10bmc_hwmon_read_string,
};

static int m10bmc_hwmon_probe(struct platform_device *pdev)
{
        const struct platform_device_id *id = platform_get_device_id(pdev);
        struct intel_m10bmc *m10bmc = dev_get_drvdata(pdev->dev.parent);
        struct device *hwmon_dev, *dev = &pdev->dev;
        struct m10bmc_hwmon *hw;
        int i;

        hw = devm_kzalloc(dev, sizeof(*hw), GFP_KERNEL);
        if (!hw)
                return -ENOMEM;

        hw->dev = dev;
        hw->m10bmc = m10bmc;
        hw->bdata = (const struct m10bmc_hwmon_board_data *)id->driver_data;

        hw->chip.info = hw->bdata->hinfo;
        hw->chip.ops = &m10bmc_hwmon_ops;

        hw->hw_name = devm_kstrdup(dev, id->name, GFP_KERNEL);
        if (!hw->hw_name)
                return -ENOMEM;

        for (i = 0; hw->hw_name[i]; i++)
                if (hwmon_is_bad_char(hw->hw_name[i]))
                        hw->hw_name[i] = '_';

        hwmon_dev = devm_hwmon_device_register_with_info(dev, hw->hw_name,
                                                         hw, &hw->chip, NULL);
        return PTR_ERR_OR_ZERO(hwmon_dev);
}

static const struct platform_device_id intel_m10bmc_hwmon_ids[] = {
        {
                .name = "n3000bmc-hwmon",
                .driver_data = (unsigned long)&n3000bmc_hwmon_bdata,
        },
        {
                .name = "d5005bmc-hwmon",
                .driver_data = (unsigned long)&d5005bmc_hwmon_bdata,
        },
        {
                .name = "n5010bmc-hwmon",
                .driver_data = (unsigned long)&n5010bmc_hwmon_bdata,
        },
        { }
};

static struct platform_driver intel_m10bmc_hwmon_driver = {
        .probe = m10bmc_hwmon_probe,
        .driver = {
                .name = "intel-m10-bmc-hwmon",
        },
        .id_table = intel_m10bmc_hwmon_ids,
};
module_platform_driver(intel_m10bmc_hwmon_driver);

MODULE_DEVICE_TABLE(platform, intel_m10bmc_hwmon_ids);
MODULE_AUTHOR("Intel Corporation");
MODULE_DESCRIPTION("Intel MAX 10 BMC hardware monitor");
MODULE_LICENSE("GPL");