Thomas Gleixner | d2912cb | 2019-06-04 10:11:33 +0200 | [diff] [blame^] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
Aaron Lu | 77e337c | 2014-09-03 15:13:02 +0800 | [diff] [blame] | 2 | /* |
| 3 | * INT3402 thermal driver for memory temperature reporting |
| 4 | * |
| 5 | * Copyright (C) 2014, Intel Corporation |
| 6 | * Authors: Aaron Lu <aaron.lu@intel.com> |
Aaron Lu | 77e337c | 2014-09-03 15:13:02 +0800 | [diff] [blame] | 7 | */ |
| 8 | |
| 9 | #include <linux/module.h> |
| 10 | #include <linux/platform_device.h> |
| 11 | #include <linux/acpi.h> |
| 12 | #include <linux/thermal.h> |
Srinivas Pandruvada | 820cdeb | 2015-01-16 15:59:04 -0800 | [diff] [blame] | 13 | #include "int340x_thermal_zone.h" |
Aaron Lu | 77e337c | 2014-09-03 15:13:02 +0800 | [diff] [blame] | 14 | |
Srinivas Pandruvada | acebf7e | 2014-12-23 15:29:57 -0800 | [diff] [blame] | 15 | #define INT3402_PERF_CHANGED_EVENT 0x80 |
| 16 | #define INT3402_THERMAL_EVENT 0x90 |
| 17 | |
Aaron Lu | 77e337c | 2014-09-03 15:13:02 +0800 | [diff] [blame] | 18 | struct int3402_thermal_data { |
Aaron Lu | 77e337c | 2014-09-03 15:13:02 +0800 | [diff] [blame] | 19 | acpi_handle *handle; |
Srinivas Pandruvada | 820cdeb | 2015-01-16 15:59:04 -0800 | [diff] [blame] | 20 | struct int34x_thermal_zone *int340x_zone; |
Aaron Lu | 77e337c | 2014-09-03 15:13:02 +0800 | [diff] [blame] | 21 | }; |
| 22 | |
Srinivas Pandruvada | acebf7e | 2014-12-23 15:29:57 -0800 | [diff] [blame] | 23 | static 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 Pandruvada | 9176ae8 | 2016-08-26 16:21:18 -0700 | [diff] [blame] | 34 | int340x_thermal_zone_device_update(priv->int340x_zone, |
| 35 | THERMAL_TRIP_VIOLATED); |
Srinivas Pandruvada | acebf7e | 2014-12-23 15:29:57 -0800 | [diff] [blame] | 36 | break; |
| 37 | default: |
| 38 | break; |
| 39 | } |
| 40 | } |
| 41 | |
Aaron Lu | 77e337c | 2014-09-03 15:13:02 +0800 | [diff] [blame] | 42 | static 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 Pandruvada | acebf7e | 2014-12-23 15:29:57 -0800 | [diff] [blame] | 46 | int ret; |
Aaron Lu | 77e337c | 2014-09-03 15:13:02 +0800 | [diff] [blame] | 47 | |
| 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 Pandruvada | 820cdeb | 2015-01-16 15:59:04 -0800 | [diff] [blame] | 55 | d->int340x_zone = int340x_thermal_zone_add(adev, NULL); |
| 56 | if (IS_ERR(d->int340x_zone)) |
| 57 | return PTR_ERR(d->int340x_zone); |
Aaron Lu | 77e337c | 2014-09-03 15:13:02 +0800 | [diff] [blame] | 58 | |
Srinivas Pandruvada | acebf7e | 2014-12-23 15:29:57 -0800 | [diff] [blame] | 59 | 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 Pandruvada | 820cdeb | 2015-01-16 15:59:04 -0800 | [diff] [blame] | 68 | d->handle = adev->handle; |
| 69 | platform_set_drvdata(pdev, d); |
Aaron Lu | 77e337c | 2014-09-03 15:13:02 +0800 | [diff] [blame] | 70 | |
| 71 | return 0; |
| 72 | } |
| 73 | |
| 74 | static int int3402_thermal_remove(struct platform_device *pdev) |
| 75 | { |
Srinivas Pandruvada | 820cdeb | 2015-01-16 15:59:04 -0800 | [diff] [blame] | 76 | struct int3402_thermal_data *d = platform_get_drvdata(pdev); |
Aaron Lu | 77e337c | 2014-09-03 15:13:02 +0800 | [diff] [blame] | 77 | |
Srinivas Pandruvada | acebf7e | 2014-12-23 15:29:57 -0800 | [diff] [blame] | 78 | acpi_remove_notify_handler(d->handle, |
| 79 | ACPI_DEVICE_NOTIFY, int3402_notify); |
Srinivas Pandruvada | 820cdeb | 2015-01-16 15:59:04 -0800 | [diff] [blame] | 80 | int340x_thermal_zone_remove(d->int340x_zone); |
| 81 | |
Aaron Lu | 77e337c | 2014-09-03 15:13:02 +0800 | [diff] [blame] | 82 | return 0; |
| 83 | } |
| 84 | |
| 85 | static const struct acpi_device_id int3402_thermal_match[] = { |
| 86 | {"INT3402", 0}, |
| 87 | {} |
| 88 | }; |
| 89 | |
| 90 | MODULE_DEVICE_TABLE(acpi, int3402_thermal_match); |
| 91 | |
| 92 | static struct platform_driver int3402_thermal_driver = { |
| 93 | .probe = int3402_thermal_probe, |
| 94 | .remove = int3402_thermal_remove, |
| 95 | .driver = { |
| 96 | .name = "int3402 thermal", |
Aaron Lu | 77e337c | 2014-09-03 15:13:02 +0800 | [diff] [blame] | 97 | .acpi_match_table = int3402_thermal_match, |
| 98 | }, |
| 99 | }; |
| 100 | |
| 101 | module_platform_driver(int3402_thermal_driver); |
| 102 | |
| 103 | MODULE_DESCRIPTION("INT3402 Thermal driver"); |
| 104 | MODULE_LICENSE("GPL"); |