91 lines
2.2 KiB
C
91 lines
2.2 KiB
C
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/*
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* Copyright 2013 Matthew Garrett <mjg59@srcf.ucam.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <acpi/acpi_drivers.h>
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MODULE_LICENSE("GPL");
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static int smartconnect_acpi_init(struct acpi_device *acpi)
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{
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struct acpi_object_list input;
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struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
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union acpi_object *result;
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union acpi_object param;
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acpi_status status;
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status = acpi_evaluate_object(acpi->handle, "GAOS", NULL, &output);
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if (!ACPI_SUCCESS(status))
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return -EINVAL;
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result = output.pointer;
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if (result->type != ACPI_TYPE_INTEGER) {
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kfree(result);
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return -EINVAL;
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}
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if (result->integer.value & 0x1) {
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param.type = ACPI_TYPE_INTEGER;
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param.integer.value = 0;
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input.count = 1;
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input.pointer = ¶m;
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dev_info(&acpi->dev, "Disabling Intel Smart Connect\n");
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status = acpi_evaluate_object(acpi->handle, "SAOS", &input,
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NULL);
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}
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kfree(result);
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return 0;
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}
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static const struct acpi_device_id smartconnect_ids[] = {
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{"INT33A0", 0},
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{"", 0}
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};
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static struct acpi_driver smartconnect_driver = {
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.owner = THIS_MODULE,
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.name = "intel_smart_connect",
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.class = "intel_smart_connect",
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.ids = smartconnect_ids,
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.ops = {
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.add = smartconnect_acpi_init,
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},
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};
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static int smartconnect_init(void)
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{
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return acpi_bus_register_driver(&smartconnect_driver);
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}
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static void smartconnect_exit(void)
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{
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acpi_bus_unregister_driver(&smartconnect_driver);
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}
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module_init(smartconnect_init);
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module_exit(smartconnect_exit);
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MODULE_DEVICE_TABLE(acpi, smartconnect_ids);
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