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 const struct intel_lpss_platform_info spt_info = {
  22         .clk_rate = 120000000,
  23 };
  24
  25 static struct property_entry spt_i2c_properties[] = {
  26         PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 230),
  27         { },
  28 };
  29
  30 static const struct intel_lpss_platform_info spt_i2c_info = {
  31         .clk_rate = 120000000,
  32         .properties = spt_i2c_properties,
  33 };
  34
  35 static 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
  42 static const struct intel_lpss_platform_info spt_uart_info = {
  43         .clk_rate = 120000000,
  44         .clk_con_id = "baudclk",
  45         .properties = uart_properties,
  46 };
  47
  48 static const struct intel_lpss_platform_info bxt_info = {
  49         .clk_rate = 100000000,
  50 };
  51
  52 static 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
  59 static const struct intel_lpss_platform_info bxt_i2c_info = {
  60         .clk_rate = 133000000,
  61         .properties = bxt_i2c_properties,
  62 };
  63
  64 static 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
  71 static const struct intel_lpss_platform_info apl_i2c_info = {
  72         .clk_rate = 133000000,
  73         .properties = apl_i2c_properties,
  74 };
  75
  76 static 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 };
  99 MODULE_DEVICE_TABLE(acpi, intel_lpss_acpi_ids);
 100
 101 static 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
 124 static 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
 132 static INTEL_LPSS_PM_OPS(intel_lpss_acpi_pm_ops);
 133
 134 static 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
 144 module_platform_driver(intel_lpss_acpi_driver);
 145
 146 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
 147 MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
 148 MODULE_DESCRIPTION("Intel LPSS ACPI driver");
 149 MODULE_LICENSE("GPL v2");