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