drivers/mfd/intel-lpss-acpi.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Intel LPSS ACPI support.
   4  *
   5  * Copyright (C) 2015, Intel Corporation
   6  *
   7  * Authors: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
   8  *          Mika Westerberg <mika.westerberg@linux.intel.com>
   9  */
  10
  11 #include <linux/acpi.h>
  12 #include <linux/ioport.h>
  13 #include <linux/kernel.h>
  14 #include <linux/module.h>
  15 #include <linux/pm_runtime.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/property.h>
  18
  19 #include "intel-lpss.h"
  20
  21 static struct property_entry spt_i2c_properties[] = {
  22         PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 230),
  23         { },
  24 };
  25
  26 static const struct intel_lpss_platform_info spt_i2c_info = {
  27         .clk_rate = 120000000,
  28         .properties = spt_i2c_properties,
  29 };
  30
  31 static const struct intel_lpss_platform_info bxt_info = {
  32         .clk_rate = 100000000,
  33 };
  34
  35 static struct property_entry bxt_i2c_properties[] = {
  36         PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 42),
  37         PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171),
  38         PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208),
  39         { },
  40 };
  41
  42 static const struct intel_lpss_platform_info bxt_i2c_info = {
  43         .clk_rate = 133000000,
  44         .properties = bxt_i2c_properties,
  45 };
  46
  47 static struct property_entry apl_i2c_properties[] = {
  48         PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 207),
  49         PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171),
  50         PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208),
  51         { },
  52 };
  53
  54 static const struct intel_lpss_platform_info apl_i2c_info = {
  55         .clk_rate = 133000000,
  56         .properties = apl_i2c_properties,
  57 };
  58
  59 static const struct acpi_device_id intel_lpss_acpi_ids[] = {
  60         /* SPT */
  61         { "INT3446", (kernel_ulong_t)&spt_i2c_info },
  62         { "INT3447", (kernel_ulong_t)&spt_i2c_info },
  63         /* BXT */
  64         { "80860AAC", (kernel_ulong_t)&bxt_i2c_info },
  65         { "80860ABC", (kernel_ulong_t)&bxt_info },
  66         { "80860AC2", (kernel_ulong_t)&bxt_info },
  67         /* APL */
  68         { "80865AAC", (kernel_ulong_t)&apl_i2c_info },
  69         { "80865ABC", (kernel_ulong_t)&bxt_info },
  70         { "80865AC2", (kernel_ulong_t)&bxt_info },
  71         { }
  72 };
  73 MODULE_DEVICE_TABLE(acpi, intel_lpss_acpi_ids);
  74
  75 static int intel_lpss_acpi_probe(struct platform_device *pdev)
  76 {
  77         struct intel_lpss_platform_info *info;
  78         const struct acpi_device_id *id;
  79
  80         id = acpi_match_device(intel_lpss_acpi_ids, &pdev->dev);
  81         if (!id)
  82                 return -ENODEV;
  83
  84         info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info),
  85                             GFP_KERNEL);
  86         if (!info)
  87                 return -ENOMEM;
  88
  89         info->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  90         info->irq = platform_get_irq(pdev, 0);
  91
  92         pm_runtime_set_active(&pdev->dev);
  93         pm_runtime_enable(&pdev->dev);
  94
  95         return intel_lpss_probe(&pdev->dev, info);
  96 }
  97
  98 static int intel_lpss_acpi_remove(struct platform_device *pdev)
  99 {
 100         intel_lpss_remove(&pdev->dev);
 101         pm_runtime_disable(&pdev->dev);
 102
 103         return 0;
 104 }
 105
 106 static INTEL_LPSS_PM_OPS(intel_lpss_acpi_pm_ops);
 107
 108 static struct platform_driver intel_lpss_acpi_driver = {
 109         .probe = intel_lpss_acpi_probe,
 110         .remove = intel_lpss_acpi_remove,
 111         .driver = {
 112                 .name = "intel-lpss",
 113                 .acpi_match_table = intel_lpss_acpi_ids,
 114                 .pm = &intel_lpss_acpi_pm_ops,
 115         },
 116 };
 117
 118 module_platform_driver(intel_lpss_acpi_driver);
 119
 120 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
 121 MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
 122 MODULE_DESCRIPTION("Intel LPSS ACPI driver");
 123 MODULE_LICENSE("GPL v2");