LXR linux/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#include <linux/property.h>
  22
  23#include "intel-lpss.h"
  24
  25static const struct intel_lpss_platform_info spt_info = {
  26        .clk_rate = 120000000,
  27};
  28
  29static struct property_entry spt_i2c_properties[] = {
  30        PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 230),
  31        { },
  32};
  33
  34static const struct intel_lpss_platform_info spt_i2c_info = {
  35        .clk_rate = 120000000,
  36        .properties = spt_i2c_properties,
  37};
  38
  39static const struct intel_lpss_platform_info bxt_info = {
  40        .clk_rate = 100000000,
  41};
  42
  43static struct property_entry bxt_i2c_properties[] = {
  44        PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 42),
  45        PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171),
  46        PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208),
  47        { },
  48};
  49
  50static const struct intel_lpss_platform_info bxt_i2c_info = {
  51        .clk_rate = 133000000,
  52        .properties = bxt_i2c_properties,
  53};
  54
  55static struct property_entry apl_i2c_properties[] = {
  56        PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 207),
  57        PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171),
  58        PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208),
  59        { },
  60};
  61
  62static const struct intel_lpss_platform_info apl_i2c_info = {
  63        .clk_rate = 133000000,
  64        .properties = apl_i2c_properties,
  65};
  66
  67static const struct acpi_device_id intel_lpss_acpi_ids[] = {
  68        /* SPT */
  69        { "INT3446", (kernel_ulong_t)&spt_i2c_info },
  70        { "INT3447", (kernel_ulong_t)&spt_i2c_info },
  71        /* BXT */
  72        { "80860AAC", (kernel_ulong_t)&bxt_i2c_info },
  73        { "80860ABC", (kernel_ulong_t)&bxt_info },
  74        { "80860AC2", (kernel_ulong_t)&bxt_info },
  75        /* APL */
  76        { "80865AAC", (kernel_ulong_t)&apl_i2c_info },
  77        { "80865ABC", (kernel_ulong_t)&bxt_info },
  78        { "80865AC2", (kernel_ulong_t)&bxt_info },
  79        { }
  80};
  81MODULE_DEVICE_TABLE(acpi, intel_lpss_acpi_ids);
  82
  83static int intel_lpss_acpi_probe(struct platform_device *pdev)
  84{
  85        struct intel_lpss_platform_info *info;
  86        const struct acpi_device_id *id;
  87
  88        id = acpi_match_device(intel_lpss_acpi_ids, &pdev->dev);
  89        if (!id)
  90                return -ENODEV;
  91
  92        info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info),
  93                            GFP_KERNEL);
  94        if (!info)
  95                return -ENOMEM;
  96
  97        info->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  98        info->irq = platform_get_irq(pdev, 0);
  99
 100        pm_runtime_set_active(&pdev->dev);
 101        pm_runtime_enable(&pdev->dev);
 102
 103        return intel_lpss_probe(&pdev->dev, info);
 104}
 105
 106static int intel_lpss_acpi_remove(struct platform_device *pdev)
 107{
 108        intel_lpss_remove(&pdev->dev);
 109        pm_runtime_disable(&pdev->dev);
 110
 111        return 0;
 112}
 113
 114static INTEL_LPSS_PM_OPS(intel_lpss_acpi_pm_ops);
 115
 116static struct platform_driver intel_lpss_acpi_driver = {
 117        .probe = intel_lpss_acpi_probe,
 118        .remove = intel_lpss_acpi_remove,
 119        .driver = {
 120                .name = "intel-lpss",
 121                .acpi_match_table = intel_lpss_acpi_ids,
 122                .pm = &intel_lpss_acpi_pm_ops,
 123        },
 124};
 125
 126module_platform_driver(intel_lpss_acpi_driver);
 127
 128MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
 129MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
 130MODULE_DESCRIPTION("Intel LPSS ACPI driver");
 131MODULE_LICENSE("GPL v2");
 132