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/device.h>
  12 #include <linux/gfp_types.h>
  13 #include <linux/ioport.h>
  14 #include <linux/mod_devicetable.h>
  15 #include <linux/module.h>
  16 #include <linux/pm_runtime.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/property.h>
  19
  20 #include <linux/pxa2xx_ssp.h>
  21
  22 #include <asm/errno.h>
  23
  24 #include "intel-lpss.h"
  25
  26 static const struct property_entry spt_spi_properties[] = {
  27         PROPERTY_ENTRY_U32("intel,spi-pxa2xx-type", LPSS_SPT_SSP),
  28         { }
  29 };
  30
  31 static const struct software_node spt_spi_node = {
  32         .properties = spt_spi_properties,
  33 };
  34
  35 static const struct intel_lpss_platform_info spt_info = {
  36         .clk_rate = 120000000,
  37         .swnode = &spt_spi_node,
  38 };
  39
  40 static const struct property_entry spt_i2c_properties[] = {
  41         PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 230),
  42         { },
  43 };
  44
  45 static const struct software_node spt_i2c_node = {
  46         .properties = spt_i2c_properties,
  47 };
  48
  49 static const struct intel_lpss_platform_info spt_i2c_info = {
  50         .clk_rate = 120000000,
  51         .swnode = &spt_i2c_node,
  52 };
  53
  54 static const struct property_entry uart_properties[] = {
  55         PROPERTY_ENTRY_U32("reg-io-width", 4),
  56         PROPERTY_ENTRY_U32("reg-shift", 2),
  57         PROPERTY_ENTRY_BOOL("snps,uart-16550-compatible"),
  58         { },
  59 };
  60
  61 static const struct software_node uart_node = {
  62         .properties = uart_properties,
  63 };
  64
  65 static const struct intel_lpss_platform_info spt_uart_info = {
  66         .clk_rate = 120000000,
  67         .clk_con_id = "baudclk",
  68         .swnode = &uart_node,
  69 };
  70
  71 static const struct property_entry bxt_spi_properties[] = {
  72         PROPERTY_ENTRY_U32("intel,spi-pxa2xx-type", LPSS_BXT_SSP),
  73         { }
  74 };
  75
  76 static const struct software_node bxt_spi_node = {
  77         .properties = bxt_spi_properties,
  78 };
  79
  80 static const struct intel_lpss_platform_info bxt_info = {
  81         .clk_rate = 100000000,
  82         .swnode = &bxt_spi_node,
  83 };
  84
  85 static const struct property_entry bxt_i2c_properties[] = {
  86         PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 42),
  87         PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171),
  88         PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208),
  89         { },
  90 };
  91
  92 static const struct software_node bxt_i2c_node = {
  93         .properties = bxt_i2c_properties,
  94 };
  95
  96 static const struct intel_lpss_platform_info bxt_i2c_info = {
  97         .clk_rate = 133000000,
  98         .swnode = &bxt_i2c_node,
  99 };
 100
 101 static const struct property_entry apl_i2c_properties[] = {
 102         PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 207),
 103         PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171),
 104         PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208),
 105         { },
 106 };
 107
 108 static const struct software_node apl_i2c_node = {
 109         .properties = apl_i2c_properties,
 110 };
 111
 112 static const struct intel_lpss_platform_info apl_i2c_info = {
 113         .clk_rate = 133000000,
 114         .swnode = &apl_i2c_node,
 115 };
 116
 117 static const struct property_entry cnl_spi_properties[] = {
 118         PROPERTY_ENTRY_U32("intel,spi-pxa2xx-type", LPSS_CNL_SSP),
 119         { }
 120 };
 121
 122 static const struct software_node cnl_spi_node = {
 123         .properties = cnl_spi_properties,
 124 };
 125
 126 static const struct intel_lpss_platform_info cnl_info = {
 127         .clk_rate = 120000000,
 128         .swnode = &cnl_spi_node,
 129 };
 130
 131 static const struct intel_lpss_platform_info cnl_i2c_info = {
 132         .clk_rate = 216000000,
 133         .swnode = &spt_i2c_node,
 134 };
 135
 136 static const struct acpi_device_id intel_lpss_acpi_ids[] = {
 137         /* SPT */
 138         { "INT3440", (kernel_ulong_t)&spt_info },
 139         { "INT3441", (kernel_ulong_t)&spt_info },
 140         { "INT3442", (kernel_ulong_t)&spt_i2c_info },
 141         { "INT3443", (kernel_ulong_t)&spt_i2c_info },
 142         { "INT3444", (kernel_ulong_t)&spt_i2c_info },
 143         { "INT3445", (kernel_ulong_t)&spt_i2c_info },
 144         { "INT3446", (kernel_ulong_t)&spt_i2c_info },
 145         { "INT3447", (kernel_ulong_t)&spt_i2c_info },
 146         { "INT3448", (kernel_ulong_t)&spt_uart_info },
 147         { "INT3449", (kernel_ulong_t)&spt_uart_info },
 148         { "INT344A", (kernel_ulong_t)&spt_uart_info },
 149         /* CNL */
 150         { "INT34B0", (kernel_ulong_t)&cnl_info },
 151         { "INT34B1", (kernel_ulong_t)&cnl_info },
 152         { "INT34B2", (kernel_ulong_t)&cnl_i2c_info },
 153         { "INT34B3", (kernel_ulong_t)&cnl_i2c_info },
 154         { "INT34B4", (kernel_ulong_t)&cnl_i2c_info },
 155         { "INT34B5", (kernel_ulong_t)&cnl_i2c_info },
 156         { "INT34B6", (kernel_ulong_t)&cnl_i2c_info },
 157         { "INT34B7", (kernel_ulong_t)&cnl_i2c_info },
 158         { "INT34B8", (kernel_ulong_t)&spt_uart_info },
 159         { "INT34B9", (kernel_ulong_t)&spt_uart_info },
 160         { "INT34BA", (kernel_ulong_t)&spt_uart_info },
 161         { "INT34BC", (kernel_ulong_t)&cnl_info },
 162         /* BXT */
 163         { "80860AAC", (kernel_ulong_t)&bxt_i2c_info },
 164         { "80860ABC", (kernel_ulong_t)&bxt_info },
 165         { "80860AC2", (kernel_ulong_t)&bxt_info },
 166         /* APL */
 167         { "80865AAC", (kernel_ulong_t)&apl_i2c_info },
 168         { "80865ABC", (kernel_ulong_t)&bxt_info },
 169         { "80865AC2", (kernel_ulong_t)&bxt_info },
 170         { }
 171 };
 172 MODULE_DEVICE_TABLE(acpi, intel_lpss_acpi_ids);
 173
 174 static int intel_lpss_acpi_probe(struct platform_device *pdev)
 175 {
 176         const struct intel_lpss_platform_info *data;
 177         struct intel_lpss_platform_info *info;
 178         int ret;
 179
 180         data = device_get_match_data(&pdev->dev);
 181         if (!data)
 182                 return -ENODEV;
 183
 184         info = devm_kmemdup(&pdev->dev, data, sizeof(*info), GFP_KERNEL);
 185         if (!info)
 186                 return -ENOMEM;
 187
 188         /* No need to check mem and irq here as intel_lpss_probe() does it for us */
 189         info->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 190         info->irq = platform_get_irq(pdev, 0);
 191
 192         ret = intel_lpss_probe(&pdev->dev, info);
 193         if (ret)
 194                 return ret;
 195
 196         pm_runtime_set_active(&pdev->dev);
 197         pm_runtime_enable(&pdev->dev);
 198
 199         return 0;
 200 }
 201
 202 static void intel_lpss_acpi_remove(struct platform_device *pdev)
 203 {
 204         intel_lpss_remove(&pdev->dev);
 205         pm_runtime_disable(&pdev->dev);
 206 }
 207
 208 static INTEL_LPSS_PM_OPS(intel_lpss_acpi_pm_ops);
 209
 210 static struct platform_driver intel_lpss_acpi_driver = {
 211         .probe = intel_lpss_acpi_probe,
 212         .remove_new = intel_lpss_acpi_remove,
 213         .driver = {
 214                 .name = "intel-lpss",
 215                 .acpi_match_table = intel_lpss_acpi_ids,
 216                 .pm = &intel_lpss_acpi_pm_ops,
 217         },
 218 };
 219
 220 module_platform_driver(intel_lpss_acpi_driver);
 221
 222 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
 223 MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
 224 MODULE_DESCRIPTION("Intel LPSS ACPI driver");
 225 MODULE_LICENSE("GPL v2");
 226 MODULE_IMPORT_NS(INTEL_LPSS);