LXR linux/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
   9MODULE_LICENSE("GPL");
  10
  11static 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
  28static const struct acpi_device_id smartconnect_ids[] = {
  29        {"INT33A0", 0},
  30        {"", 0}
  31};
  32MODULE_DEVICE_TABLE(acpi, smartconnect_ids);
  33
  34static 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
  44module_acpi_driver(smartconnect_driver);
  45