// SPDX-License-Identifier: GPL-2.0
/*
 * Dollar Cove TI PMIC operation region driver
 * Copyright (C) 2014 Intel Corporation. All rights reserved.
 *
 * Rewritten and cleaned up
 * Copyright (C) 2017 Takashi Iwai <tiwai@suse.de>
 */

#include <linux/acpi.h>
#include <linux/bits.h>
#include <linux/init.h>
#include <linux/mfd/intel_soc_pmic.h>
#include <linux/platform_device.h>
#include <asm/byteorder.h>
#include "intel_pmic.h"

/* registers stored in 16bit BE (high:low, total 10bit) */
#define PMIC_REG_MASK           GENMASK(9, 0)

#define CHTDC_TI_VBAT           0x54
#define CHTDC_TI_DIETEMP        0x56
#define CHTDC_TI_BPTHERM        0x58
#define CHTDC_TI_GPADC          0x5a

static const struct pmic_table chtdc_ti_power_table[] = {
        { .address = 0x00, .reg = 0x41 }, /* LDO1 */
        { .address = 0x04, .reg = 0x42 }, /* LDO2 */
        { .address = 0x08, .reg = 0x43 }, /* LDO3 */
        { .address = 0x0c, .reg = 0x45 }, /* LDO5 */
        { .address = 0x10, .reg = 0x46 }, /* LDO6 */
        { .address = 0x14, .reg = 0x47 }, /* LDO7 */
        { .address = 0x18, .reg = 0x48 }, /* LDO8 */
        { .address = 0x1c, .reg = 0x49 }, /* LDO9 */
        { .address = 0x20, .reg = 0x4a }, /* LD10 */
        { .address = 0x24, .reg = 0x4b }, /* LD11 */
        { .address = 0x28, .reg = 0x4c }, /* LD12 */
        { .address = 0x2c, .reg = 0x4d }, /* LD13 */
        { .address = 0x30, .reg = 0x4e }, /* LD14 */
};

static const struct pmic_table chtdc_ti_thermal_table[] = {
        {
                .address = 0x00,
                .reg = CHTDC_TI_GPADC
        },
        {
                .address = 0x0c,
                .reg = CHTDC_TI_GPADC
        },
        /* TMP2 -> SYSTEMP */
        {
                .address = 0x18,
                .reg = CHTDC_TI_GPADC
        },
        /* TMP3 -> BPTHERM */
        {
                .address = 0x24,
                .reg = CHTDC_TI_BPTHERM
        },
        {
                .address = 0x30,
                .reg = CHTDC_TI_GPADC
        },
        /* TMP5 -> DIETEMP */
        {
                .address = 0x3c,
                .reg = CHTDC_TI_DIETEMP
        },
};

static int chtdc_ti_pmic_get_power(struct regmap *regmap, int reg, int bit,
                                   u64 *value)
{
        int data;

        if (regmap_read(regmap, reg, &data))
                return -EIO;

        *value = data & BIT(0);
        return 0;
}

static int chtdc_ti_pmic_update_power(struct regmap *regmap, int reg, int bit,
                                      bool on)
{
        return regmap_update_bits(regmap, reg, 1, on);
}

static int chtdc_ti_pmic_get_raw_temp(struct regmap *regmap, int reg)
{
        __be16 buf;

        if (regmap_bulk_read(regmap, reg, &buf, sizeof(buf)))
                return -EIO;

        return be16_to_cpu(buf) & PMIC_REG_MASK;
}

static const struct intel_pmic_opregion_data chtdc_ti_pmic_opregion_data = {
        .get_power = chtdc_ti_pmic_get_power,
        .update_power = chtdc_ti_pmic_update_power,
        .get_raw_temp = chtdc_ti_pmic_get_raw_temp,
        .lpat_raw_to_temp = acpi_lpat_raw_to_temp,
        .power_table = chtdc_ti_power_table,
        .power_table_count = ARRAY_SIZE(chtdc_ti_power_table),
        .thermal_table = chtdc_ti_thermal_table,
        .thermal_table_count = ARRAY_SIZE(chtdc_ti_thermal_table),
        .pmic_i2c_address = 0x5e,
};

static int chtdc_ti_pmic_opregion_probe(struct platform_device *pdev)
{
        struct intel_soc_pmic *pmic = dev_get_drvdata(pdev->dev.parent);
        int err;

        err = intel_pmic_install_opregion_handler(&pdev->dev,
                        ACPI_HANDLE(pdev->dev.parent), pmic->regmap,
                        &chtdc_ti_pmic_opregion_data);
        if (err < 0)
                return err;

        /* Re-enumerate devices depending on PMIC */
        acpi_dev_clear_dependencies(ACPI_COMPANION(pdev->dev.parent));
        return 0;
}

static const struct platform_device_id chtdc_ti_pmic_opregion_id_table[] = {
        { .name = "chtdc_ti_region" },
        {},
};

static struct platform_driver chtdc_ti_pmic_opregion_driver = {
        .probe = chtdc_ti_pmic_opregion_probe,
        .driver = {
                .name = "cht_dollar_cove_ti_pmic",
        },
        .id_table = chtdc_ti_pmic_opregion_id_table,
};
builtin_platform_driver(chtdc_ti_pmic_opregion_driver);