1 // SPDX-License-Identifier: GPL-2.0-only
3 * Intel LPSS ACPI support.
5 * Copyright (C) 2015, Intel Corporation
7 * Authors: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
8 * Mika Westerberg <mika.westerberg@linux.intel.com>
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>
19 #include "intel-lpss.h"
21 static const struct intel_lpss_platform_info spt_info = {
22 .clk_rate = 120000000,
25 static const struct property_entry spt_i2c_properties[] = {
26 PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 230),
30 static const struct software_node spt_i2c_node = {
31 .properties = spt_i2c_properties,
34 static const struct intel_lpss_platform_info spt_i2c_info = {
35 .clk_rate = 120000000,
36 .swnode = &spt_i2c_node,
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"),
46 static const struct software_node uart_node = {
47 .properties = uart_properties,
50 static const struct intel_lpss_platform_info spt_uart_info = {
51 .clk_rate = 120000000,
52 .clk_con_id = "baudclk",
56 static const struct intel_lpss_platform_info bxt_info = {
57 .clk_rate = 100000000,
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),
67 static const struct software_node bxt_i2c_node = {
68 .properties = bxt_i2c_properties,
71 static const struct intel_lpss_platform_info bxt_i2c_info = {
72 .clk_rate = 133000000,
73 .swnode = &bxt_i2c_node,
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),
83 static const struct software_node apl_i2c_node = {
84 .properties = apl_i2c_properties,
87 static const struct intel_lpss_platform_info apl_i2c_info = {
88 .clk_rate = 133000000,
89 .swnode = &apl_i2c_node,
92 static const struct acpi_device_id intel_lpss_acpi_ids[] = {
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 },
106 { "80860AAC", (kernel_ulong_t)&bxt_i2c_info },
107 { "80860ABC", (kernel_ulong_t)&bxt_info },
108 { "80860AC2", (kernel_ulong_t)&bxt_info },
110 { "80865AAC", (kernel_ulong_t)&apl_i2c_info },
111 { "80865ABC", (kernel_ulong_t)&bxt_info },
112 { "80865AC2", (kernel_ulong_t)&bxt_info },
115 MODULE_DEVICE_TABLE(acpi, intel_lpss_acpi_ids);
117 static int intel_lpss_acpi_probe(struct platform_device *pdev)
119 struct intel_lpss_platform_info *info;
120 const struct acpi_device_id *id;
122 id = acpi_match_device(intel_lpss_acpi_ids, &pdev->dev);
126 info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info),
131 info->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
132 info->irq = platform_get_irq(pdev, 0);
134 pm_runtime_set_active(&pdev->dev);
135 pm_runtime_enable(&pdev->dev);
137 return intel_lpss_probe(&pdev->dev, info);
140 static int intel_lpss_acpi_remove(struct platform_device *pdev)
142 intel_lpss_remove(&pdev->dev);
143 pm_runtime_disable(&pdev->dev);
148 static INTEL_LPSS_PM_OPS(intel_lpss_acpi_pm_ops);
150 static struct platform_driver intel_lpss_acpi_driver = {
151 .probe = intel_lpss_acpi_probe,
152 .remove = intel_lpss_acpi_remove,
154 .name = "intel-lpss",
155 .acpi_match_table = intel_lpss_acpi_ids,
156 .pm = &intel_lpss_acpi_pm_ops,
160 module_platform_driver(intel_lpss_acpi_driver);
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");