blob: 43fa351e2b9ec13bf8ec117630e8b58589139313 [file] [log] [blame]
Thomas Gleixnerd2912cb2019-06-04 10:11:33 +02001// SPDX-License-Identifier: GPL-2.0-only
Aaron Lu77e337c2014-09-03 15:13:02 +08002/*
3 * INT3402 thermal driver for memory temperature reporting
4 *
5 * Copyright (C) 2014, Intel Corporation
6 * Authors: Aaron Lu <aaron.lu@intel.com>
Aaron Lu77e337c2014-09-03 15:13:02 +08007 */
8
9#include <linux/module.h>
10#include <linux/platform_device.h>
11#include <linux/acpi.h>
12#include <linux/thermal.h>
Srinivas Pandruvada820cdeb2015-01-16 15:59:04 -080013#include "int340x_thermal_zone.h"
Aaron Lu77e337c2014-09-03 15:13:02 +080014
Srinivas Pandruvadaacebf7e2014-12-23 15:29:57 -080015#define INT3402_PERF_CHANGED_EVENT 0x80
16#define INT3402_THERMAL_EVENT 0x90
17
Aaron Lu77e337c2014-09-03 15:13:02 +080018struct int3402_thermal_data {
Aaron Lu77e337c2014-09-03 15:13:02 +080019 acpi_handle *handle;
Srinivas Pandruvada820cdeb2015-01-16 15:59:04 -080020 struct int34x_thermal_zone *int340x_zone;
Aaron Lu77e337c2014-09-03 15:13:02 +080021};
22
Srinivas Pandruvadaacebf7e2014-12-23 15:29:57 -080023static void int3402_notify(acpi_handle handle, u32 event, void *data)
24{
25 struct int3402_thermal_data *priv = data;
26
27 if (!priv)
28 return;
29
30 switch (event) {
31 case INT3402_PERF_CHANGED_EVENT:
32 break;
33 case INT3402_THERMAL_EVENT:
Srinivas Pandruvada9176ae82016-08-26 16:21:18 -070034 int340x_thermal_zone_device_update(priv->int340x_zone,
35 THERMAL_TRIP_VIOLATED);
Srinivas Pandruvadaacebf7e2014-12-23 15:29:57 -080036 break;
37 default:
38 break;
39 }
40}
41
Aaron Lu77e337c2014-09-03 15:13:02 +080042static int int3402_thermal_probe(struct platform_device *pdev)
43{
44 struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);
45 struct int3402_thermal_data *d;
Srinivas Pandruvadaacebf7e2014-12-23 15:29:57 -080046 int ret;
Aaron Lu77e337c2014-09-03 15:13:02 +080047
48 if (!acpi_has_method(adev->handle, "_TMP"))
49 return -ENODEV;
50
51 d = devm_kzalloc(&pdev->dev, sizeof(*d), GFP_KERNEL);
52 if (!d)
53 return -ENOMEM;
54
Srinivas Pandruvada820cdeb2015-01-16 15:59:04 -080055 d->int340x_zone = int340x_thermal_zone_add(adev, NULL);
56 if (IS_ERR(d->int340x_zone))
57 return PTR_ERR(d->int340x_zone);
Aaron Lu77e337c2014-09-03 15:13:02 +080058
Srinivas Pandruvadaacebf7e2014-12-23 15:29:57 -080059 ret = acpi_install_notify_handler(adev->handle,
60 ACPI_DEVICE_NOTIFY,
61 int3402_notify,
62 d);
63 if (ret) {
64 int340x_thermal_zone_remove(d->int340x_zone);
65 return ret;
66 }
67
Srinivas Pandruvada820cdeb2015-01-16 15:59:04 -080068 d->handle = adev->handle;
69 platform_set_drvdata(pdev, d);
Aaron Lu77e337c2014-09-03 15:13:02 +080070
71 return 0;
72}
73
74static int int3402_thermal_remove(struct platform_device *pdev)
75{
Srinivas Pandruvada820cdeb2015-01-16 15:59:04 -080076 struct int3402_thermal_data *d = platform_get_drvdata(pdev);
Aaron Lu77e337c2014-09-03 15:13:02 +080077
Srinivas Pandruvadaacebf7e2014-12-23 15:29:57 -080078 acpi_remove_notify_handler(d->handle,
79 ACPI_DEVICE_NOTIFY, int3402_notify);
Srinivas Pandruvada820cdeb2015-01-16 15:59:04 -080080 int340x_thermal_zone_remove(d->int340x_zone);
81
Aaron Lu77e337c2014-09-03 15:13:02 +080082 return 0;
83}
84
85static const struct acpi_device_id int3402_thermal_match[] = {
86 {"INT3402", 0},
87 {}
88};
89
90MODULE_DEVICE_TABLE(acpi, int3402_thermal_match);
91
92static struct platform_driver int3402_thermal_driver = {
93 .probe = int3402_thermal_probe,
94 .remove = int3402_thermal_remove,
95 .driver = {
96 .name = "int3402 thermal",
Aaron Lu77e337c2014-09-03 15:13:02 +080097 .acpi_match_table = int3402_thermal_match,
98 },
99};
100
101module_platform_driver(int3402_thermal_driver);
102
103MODULE_DESCRIPTION("INT3402 Thermal driver");
104MODULE_LICENSE("GPL");