// SPDX-License-Identifier: GPL-2.0-only
/*
 * INT3402 thermal driver for memory temperature reporting
 *
 * Copyright (C) 2014, Intel Corporation
 * Authors: Aaron Lu <aaron.lu@intel.com>
 */

#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/acpi.h>
#include <linux/thermal.h>
#include "int340x_thermal_zone.h"

#define INT3402_PERF_CHANGED_EVENT      0x80
#define INT3402_THERMAL_EVENT           0x90

struct int3402_thermal_data {
        acpi_handle *handle;
        struct int34x_thermal_zone *int340x_zone;
};

static void int3402_notify(acpi_handle handle, u32 event, void *data)
{
        struct int3402_thermal_data *priv = data;

        if (!priv)
                return;

        switch (event) {
        case INT3402_PERF_CHANGED_EVENT:
                break;
        case INT3402_THERMAL_EVENT:
                int340x_thermal_zone_device_update(priv->int340x_zone,
                                                   THERMAL_TRIP_VIOLATED);
                break;
        default:
                break;
        }
}

static int int3402_thermal_probe(struct platform_device *pdev)
{
        struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);
        struct int3402_thermal_data *d;
        int ret;

        if (!adev)
                return -ENODEV;

        if (!acpi_has_method(adev->handle, "_TMP"))
                return -ENODEV;

        d = devm_kzalloc(&pdev->dev, sizeof(*d), GFP_KERNEL);
        if (!d)
                return -ENOMEM;

        d->int340x_zone = int340x_thermal_zone_add(adev, NULL);
        if (IS_ERR(d->int340x_zone))
                return PTR_ERR(d->int340x_zone);

        ret = acpi_install_notify_handler(adev->handle,
                                          ACPI_DEVICE_NOTIFY,
                                          int3402_notify,
                                          d);
        if (ret) {
                int340x_thermal_zone_remove(d->int340x_zone);
                return ret;
        }

        d->handle = adev->handle;
        platform_set_drvdata(pdev, d);

        return 0;
}

static void int3402_thermal_remove(struct platform_device *pdev)
{
        struct int3402_thermal_data *d = platform_get_drvdata(pdev);

        acpi_remove_notify_handler(d->handle,
                                   ACPI_DEVICE_NOTIFY, int3402_notify);
        int340x_thermal_zone_remove(d->int340x_zone);
}

static const struct acpi_device_id int3402_thermal_match[] = {
        {"INT3402", 0},
        {}
};

MODULE_DEVICE_TABLE(acpi, int3402_thermal_match);

static struct platform_driver int3402_thermal_driver = {
        .probe = int3402_thermal_probe,
        .remove = int3402_thermal_remove,
        .driver = {
                   .name = "int3402 thermal",
                   .acpi_match_table = int3402_thermal_match,
                   },
};

module_platform_driver(int3402_thermal_driver);

MODULE_DESCRIPTION("INT3402 Thermal driver");
MODULE_LICENSE("GPL");