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104 lines
2.3 KiB
104 lines
2.3 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* INT3402 thermal driver for memory temperature reporting |
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* |
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* Copyright (C) 2014, Intel Corporation |
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* Authors: Aaron Lu <[email protected]> |
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*/ |
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#include <linux/module.h> |
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#include <linux/platform_device.h> |
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#include <linux/acpi.h> |
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#include <linux/thermal.h> |
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#include "int340x_thermal_zone.h" |
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#define INT3402_PERF_CHANGED_EVENT 0x80 |
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#define INT3402_THERMAL_EVENT 0x90 |
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struct int3402_thermal_data { |
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acpi_handle *handle; |
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struct int34x_thermal_zone *int340x_zone; |
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}; |
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static void int3402_notify(acpi_handle handle, u32 event, void *data) |
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{ |
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struct int3402_thermal_data *priv = data; |
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if (!priv) |
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return; |
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switch (event) { |
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case INT3402_PERF_CHANGED_EVENT: |
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break; |
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case INT3402_THERMAL_EVENT: |
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int340x_thermal_zone_device_update(priv->int340x_zone, |
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THERMAL_TRIP_VIOLATED); |
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break; |
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default: |
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break; |
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} |
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} |
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static int int3402_thermal_probe(struct platform_device *pdev) |
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{ |
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struct acpi_device *adev = ACPI_COMPANION(&pdev->dev); |
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struct int3402_thermal_data *d; |
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int ret; |
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if (!acpi_has_method(adev->handle, "_TMP")) |
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return -ENODEV; |
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d = devm_kzalloc(&pdev->dev, sizeof(*d), GFP_KERNEL); |
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if (!d) |
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return -ENOMEM; |
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d->int340x_zone = int340x_thermal_zone_add(adev, NULL); |
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if (IS_ERR(d->int340x_zone)) |
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return PTR_ERR(d->int340x_zone); |
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ret = acpi_install_notify_handler(adev->handle, |
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ACPI_DEVICE_NOTIFY, |
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int3402_notify, |
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d); |
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if (ret) { |
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int340x_thermal_zone_remove(d->int340x_zone); |
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return ret; |
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} |
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d->handle = adev->handle; |
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platform_set_drvdata(pdev, d); |
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return 0; |
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} |
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static int int3402_thermal_remove(struct platform_device *pdev) |
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{ |
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struct int3402_thermal_data *d = platform_get_drvdata(pdev); |
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acpi_remove_notify_handler(d->handle, |
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ACPI_DEVICE_NOTIFY, int3402_notify); |
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int340x_thermal_zone_remove(d->int340x_zone); |
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return 0; |
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} |
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static const struct acpi_device_id int3402_thermal_match[] = { |
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{"INT3402", 0}, |
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{} |
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}; |
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MODULE_DEVICE_TABLE(acpi, int3402_thermal_match); |
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static struct platform_driver int3402_thermal_driver = { |
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.probe = int3402_thermal_probe, |
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.remove = int3402_thermal_remove, |
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.driver = { |
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.name = "int3402 thermal", |
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.acpi_match_table = int3402_thermal_match, |
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}, |
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}; |
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module_platform_driver(int3402_thermal_driver); |
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MODULE_DESCRIPTION("INT3402 Thermal driver"); |
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MODULE_LICENSE("GPL");
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