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// 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 (!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 int 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);
return 0;
}
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");
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