drivers/platform/x86/intel-smartconnect.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  *  Copyright 2013 Matthew Garrett <mjg59@srcf.ucam.org>
   4  */
   5
   6 #include <linux/acpi.h>
   7 #include <linux/module.h>
   8
   9 MODULE_LICENSE("GPL");
  10
  11 static int smartconnect_acpi_init(struct acpi_device *acpi)
  12 {
  13         unsigned long long value;
  14         acpi_status status;
  15
  16         status = acpi_evaluate_integer(acpi->handle, "GAOS", NULL, &value);
  17         if (ACPI_FAILURE(status))
  18                 return -EINVAL;
  19
  20         if (value & 0x1) {
  21                 dev_info(&acpi->dev, "Disabling Intel Smart Connect\n");
  22                 status = acpi_execute_simple_method(acpi->handle, "SAOS", 0);
  23         }
  24
  25         return 0;
  26 }
  27
  28 static const struct acpi_device_id smartconnect_ids[] = {
  29         {"INT33A0", 0},
  30         {"", 0}
  31 };
  32 MODULE_DEVICE_TABLE(acpi, smartconnect_ids);
  33
  34 static struct acpi_driver smartconnect_driver = {
  35         .owner = THIS_MODULE,
  36         .name = "intel_smart_connect",
  37         .class = "intel_smart_connect",
  38         .ids = smartconnect_ids,
  39         .ops = {
  40                 .add = smartconnect_acpi_init,
  41         },
  42 };
  43
  44 module_acpi_driver(smartconnect_driver);