Commit | Line | Data |
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77e337c6 AL |
1 | /* |
2 | * INT3402 thermal driver for memory temperature reporting | |
3 | * | |
4 | * Copyright (C) 2014, Intel Corporation | |
5 | * Authors: Aaron Lu <aaron.lu@intel.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | */ | |
12 | ||
13 | #include <linux/module.h> | |
14 | #include <linux/platform_device.h> | |
15 | #include <linux/acpi.h> | |
16 | #include <linux/thermal.h> | |
820cdeba | 17 | #include "int340x_thermal_zone.h" |
77e337c6 | 18 | |
acebf7ee SP |
19 | #define INT3402_PERF_CHANGED_EVENT 0x80 |
20 | #define INT3402_THERMAL_EVENT 0x90 | |
21 | ||
77e337c6 | 22 | struct int3402_thermal_data { |
77e337c6 | 23 | acpi_handle *handle; |
820cdeba | 24 | struct int34x_thermal_zone *int340x_zone; |
77e337c6 AL |
25 | }; |
26 | ||
acebf7ee SP |
27 | static void int3402_notify(acpi_handle handle, u32 event, void *data) |
28 | { | |
29 | struct int3402_thermal_data *priv = data; | |
30 | ||
31 | if (!priv) | |
32 | return; | |
33 | ||
34 | switch (event) { | |
35 | case INT3402_PERF_CHANGED_EVENT: | |
36 | break; | |
37 | case INT3402_THERMAL_EVENT: | |
38 | int340x_thermal_zone_device_update(priv->int340x_zone); | |
39 | break; | |
40 | default: | |
41 | break; | |
42 | } | |
43 | } | |
44 | ||
77e337c6 AL |
45 | static int int3402_thermal_probe(struct platform_device *pdev) |
46 | { | |
47 | struct acpi_device *adev = ACPI_COMPANION(&pdev->dev); | |
48 | struct int3402_thermal_data *d; | |
acebf7ee | 49 | int ret; |
77e337c6 AL |
50 | |
51 | if (!acpi_has_method(adev->handle, "_TMP")) | |
52 | return -ENODEV; | |
53 | ||
54 | d = devm_kzalloc(&pdev->dev, sizeof(*d), GFP_KERNEL); | |
55 | if (!d) | |
56 | return -ENOMEM; | |
57 | ||
820cdeba SP |
58 | d->int340x_zone = int340x_thermal_zone_add(adev, NULL); |
59 | if (IS_ERR(d->int340x_zone)) | |
60 | return PTR_ERR(d->int340x_zone); | |
61 | ||
acebf7ee SP |
62 | ret = acpi_install_notify_handler(adev->handle, |
63 | ACPI_DEVICE_NOTIFY, | |
64 | int3402_notify, | |
65 | d); | |
66 | if (ret) { | |
67 | int340x_thermal_zone_remove(d->int340x_zone); | |
68 | return ret; | |
69 | } | |
70 | ||
820cdeba SP |
71 | d->handle = adev->handle; |
72 | platform_set_drvdata(pdev, d); | |
77e337c6 AL |
73 | |
74 | return 0; | |
75 | } | |
76 | ||
77 | static int int3402_thermal_remove(struct platform_device *pdev) | |
78 | { | |
820cdeba SP |
79 | struct int3402_thermal_data *d = platform_get_drvdata(pdev); |
80 | ||
acebf7ee SP |
81 | acpi_remove_notify_handler(d->handle, |
82 | ACPI_DEVICE_NOTIFY, int3402_notify); | |
820cdeba | 83 | int340x_thermal_zone_remove(d->int340x_zone); |
77e337c6 | 84 | |
77e337c6 AL |
85 | return 0; |
86 | } | |
87 | ||
88 | static const struct acpi_device_id int3402_thermal_match[] = { | |
89 | {"INT3402", 0}, | |
90 | {} | |
91 | }; | |
92 | ||
93 | MODULE_DEVICE_TABLE(acpi, int3402_thermal_match); | |
94 | ||
95 | static struct platform_driver int3402_thermal_driver = { | |
96 | .probe = int3402_thermal_probe, | |
97 | .remove = int3402_thermal_remove, | |
98 | .driver = { | |
99 | .name = "int3402 thermal", | |
77e337c6 AL |
100 | .acpi_match_table = int3402_thermal_match, |
101 | }, | |
102 | }; | |
103 | ||
104 | module_platform_driver(int3402_thermal_driver); | |
105 | ||
106 | MODULE_DESCRIPTION("INT3402 Thermal driver"); | |
107 | MODULE_LICENSE("GPL"); |