kernel/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 intel_lpss_platform_info bxt_info = {
  29         .clk_rate = 100000000,
  30 };
  31
  32 static const struct intel_lpss_platform_info bxt_i2c_info = {
  33         .clk_rate = 133000000,
  34 };
  35
  36 static const struct acpi_device_id intel_lpss_acpi_ids[] = {
  37         /* SPT */
  38         { "INT3446", (kernel_ulong_t)&spt_info },
  39         { "INT3447", (kernel_ulong_t)&spt_info },
  40         /* BXT */
  41         { "80860AAC", (kernel_ulong_t)&bxt_i2c_info },
  42         { "80860ABC", (kernel_ulong_t)&bxt_info },
  43         { "80860AC2", (kernel_ulong_t)&bxt_info },
  44         /* APL */
  45         { "80865AAC", (kernel_ulong_t)&bxt_i2c_info },
  46         { "80865ABC", (kernel_ulong_t)&bxt_info },
  47         { "80865AC2", (kernel_ulong_t)&bxt_info },
  48         { }
  49 };
  50 MODULE_DEVICE_TABLE(acpi, intel_lpss_acpi_ids);
  51
  52 static int intel_lpss_acpi_probe(struct platform_device *pdev)
  53 {
  54         struct intel_lpss_platform_info *info;
  55         const struct acpi_device_id *id;
  56
  57         id = acpi_match_device(intel_lpss_acpi_ids, &pdev->dev);
  58         if (!id)
  59                 return -ENODEV;
  60
  61         info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info),
  62                             GFP_KERNEL);
  63         if (!info)
  64                 return -ENOMEM;
  65
  66         info->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  67         info->irq = platform_get_irq(pdev, 0);
  68
  69         pm_runtime_set_active(&pdev->dev);
  70         pm_runtime_enable(&pdev->dev);
  71
  72         return intel_lpss_probe(&pdev->dev, info);
  73 }
  74
  75 static int intel_lpss_acpi_remove(struct platform_device *pdev)
  76 {
  77         intel_lpss_remove(&pdev->dev);
  78         pm_runtime_disable(&pdev->dev);
  79
  80         return 0;
  81 }
  82
  83 static INTEL_LPSS_PM_OPS(intel_lpss_acpi_pm_ops);
  84
  85 static struct platform_driver intel_lpss_acpi_driver = {
  86         .probe = intel_lpss_acpi_probe,
  87         .remove = intel_lpss_acpi_remove,
  88         .driver = {
  89                 .name = "intel-lpss",
  90                 .acpi_match_table = intel_lpss_acpi_ids,
  91                 .pm = &intel_lpss_acpi_pm_ops,
  92         },
  93 };
  94
  95 module_platform_driver(intel_lpss_acpi_driver);
  96
  97 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
  98 MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
  99 MODULE_DESCRIPTION("Intel LPSS ACPI driver");
 100 MODULE_LICENSE("GPL v2");