mirror of https://gitee.com/openkylin/linux.git
109 lines
2.4 KiB
C
109 lines
2.4 KiB
C
/*
|
|
* INT3402 thermal driver for memory temperature reporting
|
|
*
|
|
* Copyright (C) 2014, Intel Corporation
|
|
* Authors: Aaron Lu <aaron.lu@intel.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
*/
|
|
|
|
#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");
|