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