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 const struct property_entry spt_i2c_properties[] = {
  26         PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 230),
  27         { },
  28 };
  29
  30 static const struct software_node spt_i2c_node = {
  31         .properties = spt_i2c_properties,
  32 };
  33
  34 static const struct intel_lpss_platform_info spt_i2c_info = {
  35         .clk_rate = 120000000,
  36         .swnode = &spt_i2c_node,
  37 };
  38
  39 static const struct property_entry uart_properties[] = {
  40         PROPERTY_ENTRY_U32("reg-io-width", 4),
  41         PROPERTY_ENTRY_U32("reg-shift", 2),
  42         PROPERTY_ENTRY_BOOL("snps,uart-16550-compatible"),
  43         { },
  44 };
  45
  46 static const struct software_node uart_node = {
  47         .properties = uart_properties,
  48 };
  49
  50 static const struct intel_lpss_platform_info spt_uart_info = {
  51         .clk_rate = 120000000,
  52         .clk_con_id = "baudclk",
  53         .swnode = &uart_node,
  54 };
  55
  56 static const struct intel_lpss_platform_info bxt_info = {
  57         .clk_rate = 100000000,
  58 };
  59
  60 static const struct property_entry bxt_i2c_properties[] = {
  61         PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 42),
  62         PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171),
  63         PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208),
  64         { },
  65 };
  66
  67 static const struct software_node bxt_i2c_node = {
  68         .properties = bxt_i2c_properties,
  69 };
  70
  71 static const struct intel_lpss_platform_info bxt_i2c_info = {
  72         .clk_rate = 133000000,
  73         .swnode = &bxt_i2c_node,
  74 };
  75
  76 static const struct property_entry apl_i2c_properties[] = {
  77         PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 207),
  78         PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171),
  79         PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208),
  80         { },
  81 };
  82
  83 static const struct software_node apl_i2c_node = {
  84         .properties = apl_i2c_properties,
  85 };
  86
  87 static const struct intel_lpss_platform_info apl_i2c_info = {
  88         .clk_rate = 133000000,
  89         .swnode = &apl_i2c_node,
  90 };
  91
  92 static const struct acpi_device_id intel_lpss_acpi_ids[] = {
  93         /* SPT */
  94         { "INT3440", (kernel_ulong_t)&spt_info },
  95         { "INT3441", (kernel_ulong_t)&spt_info },
  96         { "INT3442", (kernel_ulong_t)&spt_i2c_info },
  97         { "INT3443", (kernel_ulong_t)&spt_i2c_info },
  98         { "INT3444", (kernel_ulong_t)&spt_i2c_info },
  99         { "INT3445", (kernel_ulong_t)&spt_i2c_info },
 100         { "INT3446", (kernel_ulong_t)&spt_i2c_info },
 101         { "INT3447", (kernel_ulong_t)&spt_i2c_info },
 102         { "INT3448", (kernel_ulong_t)&spt_uart_info },
 103         { "INT3449", (kernel_ulong_t)&spt_uart_info },
 104         { "INT344A", (kernel_ulong_t)&spt_uart_info },
 105         /* BXT */
 106         { "80860AAC", (kernel_ulong_t)&bxt_i2c_info },
 107         { "80860ABC", (kernel_ulong_t)&bxt_info },
 108         { "80860AC2", (kernel_ulong_t)&bxt_info },
 109         /* APL */
 110         { "80865AAC", (kernel_ulong_t)&apl_i2c_info },
 111         { "80865ABC", (kernel_ulong_t)&bxt_info },
 112         { "80865AC2", (kernel_ulong_t)&bxt_info },
 113         { }
 114 };
 115 MODULE_DEVICE_TABLE(acpi, intel_lpss_acpi_ids);
 116
 117 static int intel_lpss_acpi_probe(struct platform_device *pdev)
 118 {
 119         struct intel_lpss_platform_info *info;
 120         const struct acpi_device_id *id;
 121
 122         id = acpi_match_device(intel_lpss_acpi_ids, &pdev->dev);
 123         if (!id)
 124                 return -ENODEV;
 125
 126         info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info),
 127                             GFP_KERNEL);
 128         if (!info)
 129                 return -ENOMEM;
 130
 131         info->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 132         info->irq = platform_get_irq(pdev, 0);
 133
 134         pm_runtime_set_active(&pdev->dev);
 135         pm_runtime_enable(&pdev->dev);
 136
 137         return intel_lpss_probe(&pdev->dev, info);
 138 }
 139
 140 static int intel_lpss_acpi_remove(struct platform_device *pdev)
 141 {
 142         intel_lpss_remove(&pdev->dev);
 143         pm_runtime_disable(&pdev->dev);
 144
 145         return 0;
 146 }
 147
 148 static INTEL_LPSS_PM_OPS(intel_lpss_acpi_pm_ops);
 149
 150 static struct platform_driver intel_lpss_acpi_driver = {
 151         .probe = intel_lpss_acpi_probe,
 152         .remove = intel_lpss_acpi_remove,
 153         .driver = {
 154                 .name = "intel-lpss",
 155                 .acpi_match_table = intel_lpss_acpi_ids,
 156                 .pm = &intel_lpss_acpi_pm_ops,
 157         },
 158 };
 159
 160 module_platform_driver(intel_lpss_acpi_driver);
 161
 162 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
 163 MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
 164 MODULE_DESCRIPTION("Intel LPSS ACPI driver");
 165 MODULE_LICENSE("GPL v2");