LXR linux/drivers/platform/x86/intel-smartconnect.c

   1/*
   2 *  Copyright 2013 Matthew Garrett <mjg59@srcf.ucam.org>
   3 *
   4 *  This program is free software; you can redistribute it and/or modify
   5 *  it under the terms of the GNU General Public License as published by
   6 *  the Free Software Foundation; either version 2 of the License, or
   7 *  (at your option) any later version.
   8 *
   9 *  This program is distributed in the hope that it will be useful,
  10 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 *  GNU General Public License for more details.
  13 *
  14 *  You should have received a copy of the GNU General Public License along
  15 *  with this program; if not, write to the Free Software Foundation, Inc.,
  16 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17 */
  18
  19
  20#include <linux/init.h>
  21#include <linux/module.h>
  22#include <linux/acpi.h>
  23
  24MODULE_LICENSE("GPL");
  25
  26static int smartconnect_acpi_init(struct acpi_device *acpi)
  27{
  28        unsigned long long value;
  29        acpi_status status;
  30
  31        status = acpi_evaluate_integer(acpi->handle, "GAOS", NULL, &value);
  32        if (ACPI_FAILURE(status))
  33                return -EINVAL;
  34
  35        if (value & 0x1) {
  36                dev_info(&acpi->dev, "Disabling Intel Smart Connect\n");
  37                status = acpi_execute_simple_method(acpi->handle, "SAOS", 0);
  38        }
  39
  40        return 0;
  41}
  42
  43static const struct acpi_device_id smartconnect_ids[] = {
  44        {"INT33A0", 0},
  45        {"", 0}
  46};
  47
  48static struct acpi_driver smartconnect_driver = {
  49        .owner = THIS_MODULE,
  50        .name = "intel_smart_connect",
  51        .class = "intel_smart_connect",
  52        .ids = smartconnect_ids,
  53        .ops = {
  54                .add = smartconnect_acpi_init,
  55        },
  56};
  57
  58module_acpi_driver(smartconnect_driver);
  59
  60MODULE_DEVICE_TABLE(acpi, smartconnect_ids);
  61