drivers/mfd/intel-lpss-acpi.c

   1 /*
   2  * Intel LPSS ACPI support.
   3  *
   4  * Copyright (C) 2015, Intel Corporation
   5  *
   6  * Authors: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
   7  *          Mika Westerberg <mika.westerberg@linux.intel.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 #include <linux/acpi.h>
  15 #include <linux/ioport.h>
  16 #include <linux/kernel.h>
  17 #include <linux/module.h>
  18 #include <linux/pm.h>
  19 #include <linux/pm_runtime.h>
  20 #include <linux/platform_device.h>
  21
  22 #include "intel-lpss.h"
  23
  24 static const struct intel_lpss_platform_info spt_info = {
  25         .clk_rate = 120000000,
  26 };
  27
  28 static const struct acpi_device_id intel_lpss_acpi_ids[] = {
  29         /* SPT */
  30         { "INT3446", (kernel_ulong_t)&spt_info },
  31         { "INT3447", (kernel_ulong_t)&spt_info },
  32         { }
  33 };
  34 MODULE_DEVICE_TABLE(acpi, intel_lpss_acpi_ids);
  35
  36 static int intel_lpss_acpi_probe(struct platform_device *pdev)
  37 {
  38         struct intel_lpss_platform_info *info;
  39         const struct acpi_device_id *id;
  40
  41         id = acpi_match_device(intel_lpss_acpi_ids, &pdev->dev);
  42         if (!id)
  43                 return -ENODEV;
  44
  45         info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info),
  46                             GFP_KERNEL);
  47         if (!info)
  48                 return -ENOMEM;
  49
  50         info->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  51         info->irq = platform_get_irq(pdev, 0);
  52
  53         pm_runtime_set_active(&pdev->dev);
  54         pm_runtime_enable(&pdev->dev);
  55
  56         return intel_lpss_probe(&pdev->dev, info);
  57 }
  58
  59 static int intel_lpss_acpi_remove(struct platform_device *pdev)
  60 {
  61         intel_lpss_remove(&pdev->dev);
  62         pm_runtime_disable(&pdev->dev);
  63
  64         return 0;
  65 }
  66
  67 static INTEL_LPSS_PM_OPS(intel_lpss_acpi_pm_ops);
  68
  69 static struct platform_driver intel_lpss_acpi_driver = {
  70         .probe = intel_lpss_acpi_probe,
  71         .remove = intel_lpss_acpi_remove,
  72         .driver = {
  73                 .name = "intel-lpss",
  74                 .acpi_match_table = intel_lpss_acpi_ids,
  75                 .pm = &intel_lpss_acpi_pm_ops,
  76         },
  77 };
  78
  79 module_platform_driver(intel_lpss_acpi_driver);
  80
  81 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
  82 MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
  83 MODULE_DESCRIPTION("Intel LPSS ACPI driver");
  84 MODULE_LICENSE("GPL v2");