LXR linux/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
  21static const struct intel_lpss_platform_info spt_info = {
  22        .clk_rate = 120000000,
  23};
  24
  25static struct property_entry spt_i2c_properties[] = {
  26        PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 230),
  27        { },
  28};
  29
  30static const struct intel_lpss_platform_info spt_i2c_info = {
  31        .clk_rate = 120000000,
  32        .properties = spt_i2c_properties,
  33};
  34
  35static struct property_entry uart_properties[] = {
  36        PROPERTY_ENTRY_U32("reg-io-width", 4),
  37        PROPERTY_ENTRY_U32("reg-shift", 2),
  38        PROPERTY_ENTRY_BOOL("snps,uart-16550-compatible"),
  39        { },
  40};
  41
  42static const struct intel_lpss_platform_info spt_uart_info = {
  43        .clk_rate = 120000000,
  44        .clk_con_id = "baudclk",
  45        .properties = uart_properties,
  46};
  47
  48static const struct intel_lpss_platform_info bxt_info = {
  49        .clk_rate = 100000000,
  50};
  51
  52static struct property_entry bxt_i2c_properties[] = {
  53        PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 42),
  54        PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171),
  55        PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208),
  56        { },
  57};
  58
  59static const struct intel_lpss_platform_info bxt_i2c_info = {
  60        .clk_rate = 133000000,
  61        .properties = bxt_i2c_properties,
  62};
  63
  64static struct property_entry apl_i2c_properties[] = {
  65        PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 207),
  66        PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171),
  67        PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208),
  68        { },
  69};
  70
  71static const struct intel_lpss_platform_info apl_i2c_info = {
  72        .clk_rate = 133000000,
  73        .properties = apl_i2c_properties,
  74};
  75
  76static const struct acpi_device_id intel_lpss_acpi_ids[] = {
  77        /* SPT */
  78        { "INT3440", (kernel_ulong_t)&spt_info },
  79        { "INT3441", (kernel_ulong_t)&spt_info },
  80        { "INT3442", (kernel_ulong_t)&spt_i2c_info },
  81        { "INT3443", (kernel_ulong_t)&spt_i2c_info },
  82        { "INT3444", (kernel_ulong_t)&spt_i2c_info },
  83        { "INT3445", (kernel_ulong_t)&spt_i2c_info },
  84        { "INT3446", (kernel_ulong_t)&spt_i2c_info },
  85        { "INT3447", (kernel_ulong_t)&spt_i2c_info },
  86        { "INT3448", (kernel_ulong_t)&spt_uart_info },
  87        { "INT3449", (kernel_ulong_t)&spt_uart_info },
  88        { "INT344A", (kernel_ulong_t)&spt_uart_info },
  89        /* BXT */
  90        { "80860AAC", (kernel_ulong_t)&bxt_i2c_info },
  91        { "80860ABC", (kernel_ulong_t)&bxt_info },
  92        { "80860AC2", (kernel_ulong_t)&bxt_info },
  93        /* APL */
  94        { "80865AAC", (kernel_ulong_t)&apl_i2c_info },
  95        { "80865ABC", (kernel_ulong_t)&bxt_info },
  96        { "80865AC2", (kernel_ulong_t)&bxt_info },
  97        { }
  98};
  99MODULE_DEVICE_TABLE(acpi, intel_lpss_acpi_ids);
 100
 101static int intel_lpss_acpi_probe(struct platform_device *pdev)
 102{
 103        struct intel_lpss_platform_info *info;
 104        const struct acpi_device_id *id;
 105
 106        id = acpi_match_device(intel_lpss_acpi_ids, &pdev->dev);
 107        if (!id)
 108                return -ENODEV;
 109
 110        info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info),
 111                            GFP_KERNEL);
 112        if (!info)
 113                return -ENOMEM;
 114
 115        info->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 116        info->irq = platform_get_irq(pdev, 0);
 117
 118        pm_runtime_set_active(&pdev->dev);
 119        pm_runtime_enable(&pdev->dev);
 120
 121        return intel_lpss_probe(&pdev->dev, info);
 122}
 123
 124static int intel_lpss_acpi_remove(struct platform_device *pdev)
 125{
 126        intel_lpss_remove(&pdev->dev);
 127        pm_runtime_disable(&pdev->dev);
 128
 129        return 0;
 130}
 131
 132static INTEL_LPSS_PM_OPS(intel_lpss_acpi_pm_ops);
 133
 134static struct platform_driver intel_lpss_acpi_driver = {
 135        .probe = intel_lpss_acpi_probe,
 136        .remove = intel_lpss_acpi_remove,
 137        .driver = {
 138                .name = "intel-lpss",
 139                .acpi_match_table = intel_lpss_acpi_ids,
 140                .pm = &intel_lpss_acpi_pm_ops,
 141        },
 142};
 143
 144module_platform_driver(intel_lpss_acpi_driver);
 145
 146MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
 147MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
 148MODULE_DESCRIPTION("Intel LPSS ACPI driver");
 149MODULE_LICENSE("GPL v2");
 150