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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 
 24 MODULE_LICENSE("GPL");
 25 
 26 static 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_SUCCESS(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 
 43 static const struct acpi_device_id smartconnect_ids[] = {
 44         {"INT33A0", 0},
 45         {"", 0}
 46 };
 47 
 48 static 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 
 58 module_acpi_driver(smartconnect_driver);
 59 
 60 MODULE_DEVICE_TABLE(acpi, smartconnect_ids);
 61 

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