drivers/mfd/intel-lpss-acpi.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * Intel LPSS ACPI support.
0004  *
0005  * Copyright (C) 2015, Intel Corporation
0006  *
0007  * Authors: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
0008  *          Mika Westerberg <mika.westerberg@linux.intel.com>
0009  */
0010
0011 #include <linux/acpi.h>
0012 #include <linux/ioport.h>
0013 #include <linux/kernel.h>
0014 #include <linux/module.h>
0015 #include <linux/pm_runtime.h>
0016 #include <linux/platform_device.h>
0017 #include <linux/property.h>
0018 #include <linux/pxa2xx_ssp.h>
0019
0020 #include "intel-lpss.h"
0021
0022 static const struct property_entry spt_spi_properties[] = {
0023     PROPERTY_ENTRY_U32("intel,spi-pxa2xx-type", LPSS_SPT_SSP),
0024     { }
0025 };
0026
0027 static const struct software_node spt_spi_node = {
0028     .properties = spt_spi_properties,
0029 };
0030
0031 static const struct intel_lpss_platform_info spt_info = {
0032     .clk_rate = 120000000,
0033     .swnode = &spt_spi_node,
0034 };
0035
0036 static const struct property_entry spt_i2c_properties[] = {
0037     PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 230),
0038     { },
0039 };
0040
0041 static const struct software_node spt_i2c_node = {
0042     .properties = spt_i2c_properties,
0043 };
0044
0045 static const struct intel_lpss_platform_info spt_i2c_info = {
0046     .clk_rate = 120000000,
0047     .swnode = &spt_i2c_node,
0048 };
0049
0050 static const struct property_entry uart_properties[] = {
0051     PROPERTY_ENTRY_U32("reg-io-width", 4),
0052     PROPERTY_ENTRY_U32("reg-shift", 2),
0053     PROPERTY_ENTRY_BOOL("snps,uart-16550-compatible"),
0054     { },
0055 };
0056
0057 static const struct software_node uart_node = {
0058     .properties = uart_properties,
0059 };
0060
0061 static const struct intel_lpss_platform_info spt_uart_info = {
0062     .clk_rate = 120000000,
0063     .clk_con_id = "baudclk",
0064     .swnode = &uart_node,
0065 };
0066
0067 static const struct property_entry bxt_spi_properties[] = {
0068     PROPERTY_ENTRY_U32("intel,spi-pxa2xx-type", LPSS_BXT_SSP),
0069     { }
0070 };
0071
0072 static const struct software_node bxt_spi_node = {
0073     .properties = bxt_spi_properties,
0074 };
0075
0076 static const struct intel_lpss_platform_info bxt_info = {
0077     .clk_rate = 100000000,
0078     .swnode = &bxt_spi_node,
0079 };
0080
0081 static const struct property_entry bxt_i2c_properties[] = {
0082     PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 42),
0083     PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171),
0084     PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208),
0085     { },
0086 };
0087
0088 static const struct software_node bxt_i2c_node = {
0089     .properties = bxt_i2c_properties,
0090 };
0091
0092 static const struct intel_lpss_platform_info bxt_i2c_info = {
0093     .clk_rate = 133000000,
0094     .swnode = &bxt_i2c_node,
0095 };
0096
0097 static const struct property_entry apl_i2c_properties[] = {
0098     PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 207),
0099     PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171),
0100     PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208),
0101     { },
0102 };
0103
0104 static const struct software_node apl_i2c_node = {
0105     .properties = apl_i2c_properties,
0106 };
0107
0108 static const struct intel_lpss_platform_info apl_i2c_info = {
0109     .clk_rate = 133000000,
0110     .swnode = &apl_i2c_node,
0111 };
0112
0113 static const struct property_entry cnl_spi_properties[] = {
0114     PROPERTY_ENTRY_U32("intel,spi-pxa2xx-type", LPSS_CNL_SSP),
0115     { }
0116 };
0117
0118 static const struct software_node cnl_spi_node = {
0119     .properties = cnl_spi_properties,
0120 };
0121
0122 static const struct intel_lpss_platform_info cnl_info = {
0123     .clk_rate = 120000000,
0124     .swnode = &cnl_spi_node,
0125 };
0126
0127 static const struct intel_lpss_platform_info cnl_i2c_info = {
0128     .clk_rate = 216000000,
0129     .swnode = &spt_i2c_node,
0130 };
0131
0132 static const struct acpi_device_id intel_lpss_acpi_ids[] = {
0133     /* SPT */
0134     { "INT3440", (kernel_ulong_t)&spt_info },
0135     { "INT3441", (kernel_ulong_t)&spt_info },
0136     { "INT3442", (kernel_ulong_t)&spt_i2c_info },
0137     { "INT3443", (kernel_ulong_t)&spt_i2c_info },
0138     { "INT3444", (kernel_ulong_t)&spt_i2c_info },
0139     { "INT3445", (kernel_ulong_t)&spt_i2c_info },
0140     { "INT3446", (kernel_ulong_t)&spt_i2c_info },
0141     { "INT3447", (kernel_ulong_t)&spt_i2c_info },
0142     { "INT3448", (kernel_ulong_t)&spt_uart_info },
0143     { "INT3449", (kernel_ulong_t)&spt_uart_info },
0144     { "INT344A", (kernel_ulong_t)&spt_uart_info },
0145     /* CNL */
0146     { "INT34B0", (kernel_ulong_t)&cnl_info },
0147     { "INT34B1", (kernel_ulong_t)&cnl_info },
0148     { "INT34B2", (kernel_ulong_t)&cnl_i2c_info },
0149     { "INT34B3", (kernel_ulong_t)&cnl_i2c_info },
0150     { "INT34B4", (kernel_ulong_t)&cnl_i2c_info },
0151     { "INT34B5", (kernel_ulong_t)&cnl_i2c_info },
0152     { "INT34B6", (kernel_ulong_t)&cnl_i2c_info },
0153     { "INT34B7", (kernel_ulong_t)&cnl_i2c_info },
0154     { "INT34B8", (kernel_ulong_t)&spt_uart_info },
0155     { "INT34B9", (kernel_ulong_t)&spt_uart_info },
0156     { "INT34BA", (kernel_ulong_t)&spt_uart_info },
0157     { "INT34BC", (kernel_ulong_t)&cnl_info },
0158     /* BXT */
0159     { "80860AAC", (kernel_ulong_t)&bxt_i2c_info },
0160     { "80860ABC", (kernel_ulong_t)&bxt_info },
0161     { "80860AC2", (kernel_ulong_t)&bxt_info },
0162     /* APL */
0163     { "80865AAC", (kernel_ulong_t)&apl_i2c_info },
0164     { "80865ABC", (kernel_ulong_t)&bxt_info },
0165     { "80865AC2", (kernel_ulong_t)&bxt_info },
0166     { }
0167 };
0168 MODULE_DEVICE_TABLE(acpi, intel_lpss_acpi_ids);
0169
0170 static int intel_lpss_acpi_probe(struct platform_device *pdev)
0171 {
0172     struct intel_lpss_platform_info *info;
0173     const struct acpi_device_id *id;
0174     int ret;
0175
0176     id = acpi_match_device(intel_lpss_acpi_ids, &pdev->dev);
0177     if (!id)
0178         return -ENODEV;
0179
0180     info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info),
0181                 GFP_KERNEL);
0182     if (!info)
0183         return -ENOMEM;
0184
0185     info->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
0186     info->irq = platform_get_irq(pdev, 0);
0187
0188     ret = intel_lpss_probe(&pdev->dev, info);
0189     if (ret)
0190         return ret;
0191
0192     pm_runtime_set_active(&pdev->dev);
0193     pm_runtime_enable(&pdev->dev);
0194
0195     return 0;
0196 }
0197
0198 static int intel_lpss_acpi_remove(struct platform_device *pdev)
0199 {
0200     intel_lpss_remove(&pdev->dev);
0201     pm_runtime_disable(&pdev->dev);
0202
0203     return 0;
0204 }
0205
0206 static INTEL_LPSS_PM_OPS(intel_lpss_acpi_pm_ops);
0207
0208 static struct platform_driver intel_lpss_acpi_driver = {
0209     .probe = intel_lpss_acpi_probe,
0210     .remove = intel_lpss_acpi_remove,
0211     .driver = {
0212         .name = "intel-lpss",
0213         .acpi_match_table = intel_lpss_acpi_ids,
0214         .pm = &intel_lpss_acpi_pm_ops,
0215     },
0216 };
0217
0218 module_platform_driver(intel_lpss_acpi_driver);
0219
0220 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
0221 MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
0222 MODULE_DESCRIPTION("Intel LPSS ACPI driver");
0223 MODULE_LICENSE("GPL v2");