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 #include <linux/pxa2xx_ssp.h>
  19
  20 #include "intel-lpss.h"
  21
  22 static const struct property_entry spt_spi_properties[] = {
  23         PROPERTY_ENTRY_U32("intel,spi-pxa2xx-type", LPSS_SPT_SSP),
  24         { }
  25 };
  26
  27 static const struct software_node spt_spi_node = {
  28         .properties = spt_spi_properties,
  29 };
  30
  31 static const struct intel_lpss_platform_info spt_info = {
  32         .clk_rate = 120000000,
  33         .swnode = &spt_spi_node,
  34 };
  35
  36 static const struct property_entry spt_i2c_properties[] = {
  37         PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 230),
  38         { },
  39 };
  40
  41 static const struct software_node spt_i2c_node = {
  42         .properties = spt_i2c_properties,
  43 };
  44
  45 static const struct intel_lpss_platform_info spt_i2c_info = {
  46         .clk_rate = 120000000,
  47         .swnode = &spt_i2c_node,
  48 };
  49
  50 static const struct property_entry uart_properties[] = {
  51         PROPERTY_ENTRY_U32("reg-io-width", 4),
  52         PROPERTY_ENTRY_U32("reg-shift", 2),
  53         PROPERTY_ENTRY_BOOL("snps,uart-16550-compatible"),
  54         { },
  55 };
  56
  57 static const struct software_node uart_node = {
  58         .properties = uart_properties,
  59 };
  60
  61 static const struct intel_lpss_platform_info spt_uart_info = {
  62         .clk_rate = 120000000,
  63         .clk_con_id = "baudclk",
  64         .swnode = &uart_node,
  65 };
  66
  67 static const struct property_entry bxt_spi_properties[] = {
  68         PROPERTY_ENTRY_U32("intel,spi-pxa2xx-type", LPSS_BXT_SSP),
  69         { }
  70 };
  71
  72 static const struct software_node bxt_spi_node = {
  73         .properties = bxt_spi_properties,
  74 };
  75
  76 static const struct intel_lpss_platform_info bxt_info = {
  77         .clk_rate = 100000000,
  78         .swnode = &bxt_spi_node,
  79 };
  80
  81 static const struct property_entry bxt_i2c_properties[] = {
  82         PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 42),
  83         PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171),
  84         PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208),
  85         { },
  86 };
  87
  88 static const struct software_node bxt_i2c_node = {
  89         .properties = bxt_i2c_properties,
  90 };
  91
  92 static const struct intel_lpss_platform_info bxt_i2c_info = {
  93         .clk_rate = 133000000,
  94         .swnode = &bxt_i2c_node,
  95 };
  96
  97 static const struct property_entry apl_i2c_properties[] = {
  98         PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 207),
  99         PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171),
 100         PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208),
 101         { },
 102 };
 103
 104 static const struct software_node apl_i2c_node = {
 105         .properties = apl_i2c_properties,
 106 };
 107
 108 static const struct intel_lpss_platform_info apl_i2c_info = {
 109         .clk_rate = 133000000,
 110         .swnode = &apl_i2c_node,
 111 };
 112
 113 static const struct property_entry cnl_spi_properties[] = {
 114         PROPERTY_ENTRY_U32("intel,spi-pxa2xx-type", LPSS_CNL_SSP),
 115         { }
 116 };
 117
 118 static const struct software_node cnl_spi_node = {
 119         .properties = cnl_spi_properties,
 120 };
 121
 122 static const struct intel_lpss_platform_info cnl_info = {
 123         .clk_rate = 120000000,
 124         .swnode = &cnl_spi_node,
 125 };
 126
 127 static const struct intel_lpss_platform_info cnl_i2c_info = {
 128         .clk_rate = 216000000,
 129         .swnode = &spt_i2c_node,
 130 };
 131
 132 static const struct acpi_device_id intel_lpss_acpi_ids[] = {
 133         /* SPT */
 134         { "INT3440", (kernel_ulong_t)&spt_info },
 135         { "INT3441", (kernel_ulong_t)&spt_info },
 136         { "INT3442", (kernel_ulong_t)&spt_i2c_info },
 137         { "INT3443", (kernel_ulong_t)&spt_i2c_info },
 138         { "INT3444", (kernel_ulong_t)&spt_i2c_info },
 139         { "INT3445", (kernel_ulong_t)&spt_i2c_info },
 140         { "INT3446", (kernel_ulong_t)&spt_i2c_info },
 141         { "INT3447", (kernel_ulong_t)&spt_i2c_info },
 142         { "INT3448", (kernel_ulong_t)&spt_uart_info },
 143         { "INT3449", (kernel_ulong_t)&spt_uart_info },
 144         { "INT344A", (kernel_ulong_t)&spt_uart_info },
 145         /* CNL */
 146         { "INT34B0", (kernel_ulong_t)&cnl_info },
 147         { "INT34B1", (kernel_ulong_t)&cnl_info },
 148         { "INT34B2", (kernel_ulong_t)&cnl_i2c_info },
 149         { "INT34B3", (kernel_ulong_t)&cnl_i2c_info },
 150         { "INT34B4", (kernel_ulong_t)&cnl_i2c_info },
 151         { "INT34B5", (kernel_ulong_t)&cnl_i2c_info },
 152         { "INT34B6", (kernel_ulong_t)&cnl_i2c_info },
 153         { "INT34B7", (kernel_ulong_t)&cnl_i2c_info },
 154         { "INT34B8", (kernel_ulong_t)&spt_uart_info },
 155         { "INT34B9", (kernel_ulong_t)&spt_uart_info },
 156         { "INT34BA", (kernel_ulong_t)&spt_uart_info },
 157         { "INT34BC", (kernel_ulong_t)&cnl_info },
 158         /* BXT */
 159         { "80860AAC", (kernel_ulong_t)&bxt_i2c_info },
 160         { "80860ABC", (kernel_ulong_t)&bxt_info },
 161         { "80860AC2", (kernel_ulong_t)&bxt_info },
 162         /* APL */
 163         { "80865AAC", (kernel_ulong_t)&apl_i2c_info },
 164         { "80865ABC", (kernel_ulong_t)&bxt_info },
 165         { "80865AC2", (kernel_ulong_t)&bxt_info },
 166         { }
 167 };
 168 MODULE_DEVICE_TABLE(acpi, intel_lpss_acpi_ids);
 169
 170 static int intel_lpss_acpi_probe(struct platform_device *pdev)
 171 {
 172         struct intel_lpss_platform_info *info;
 173         const struct acpi_device_id *id;
 174         int ret;
 175
 176         id = acpi_match_device(intel_lpss_acpi_ids, &pdev->dev);
 177         if (!id)
 178                 return -ENODEV;
 179
 180         info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info),
 181                             GFP_KERNEL);
 182         if (!info)
 183                 return -ENOMEM;
 184
 185         info->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 186         if (!info->mem)
 187                 return -ENODEV;
 188
 189         info->irq = platform_get_irq(pdev, 0);
 190
 191         ret = intel_lpss_probe(&pdev->dev, info);
 192         if (ret)
 193                 return ret;
 194
 195         pm_runtime_set_active(&pdev->dev);
 196         pm_runtime_enable(&pdev->dev);
 197
 198         return 0;
 199 }
 200
 201 static int intel_lpss_acpi_remove(struct platform_device *pdev)
 202 {
 203         intel_lpss_remove(&pdev->dev);
 204         pm_runtime_disable(&pdev->dev);
 205
 206         return 0;
 207 }
 208
 209 static INTEL_LPSS_PM_OPS(intel_lpss_acpi_pm_ops);
 210
 211 static struct platform_driver intel_lpss_acpi_driver = {
 212         .probe = intel_lpss_acpi_probe,
 213         .remove = intel_lpss_acpi_remove,
 214         .driver = {
 215                 .name = "intel-lpss",
 216                 .acpi_match_table = intel_lpss_acpi_ids,
 217                 .pm = &intel_lpss_acpi_pm_ops,
 218         },
 219 };
 220
 221 module_platform_driver(intel_lpss_acpi_driver);
 222
 223 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
 224 MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
 225 MODULE_DESCRIPTION("Intel LPSS ACPI driver");
 226 MODULE_LICENSE("GPL v2");