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Linux kernel mirror (for testing)
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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
19#include "intel-lpss.h"
20
21static const struct intel_lpss_platform_info spt_info = {
22 .clk_rate = 120000000,
23};
24
25static const struct property_entry spt_i2c_properties[] = {
26 PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 230),
27 { },
28};
29
30static const struct software_node spt_i2c_node = {
31 .properties = spt_i2c_properties,
32};
33
34static const struct intel_lpss_platform_info spt_i2c_info = {
35 .clk_rate = 120000000,
36 .swnode = &spt_i2c_node,
37};
38
39static 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"),
43 { },
44};
45
46static const struct software_node uart_node = {
47 .properties = uart_properties,
48};
49
50static const struct intel_lpss_platform_info spt_uart_info = {
51 .clk_rate = 120000000,
52 .clk_con_id = "baudclk",
53 .swnode = &uart_node,
54};
55
56static const struct intel_lpss_platform_info bxt_info = {
57 .clk_rate = 100000000,
58};
59
60static 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),
64 { },
65};
66
67static const struct software_node bxt_i2c_node = {
68 .properties = bxt_i2c_properties,
69};
70
71static const struct intel_lpss_platform_info bxt_i2c_info = {
72 .clk_rate = 133000000,
73 .swnode = &bxt_i2c_node,
74};
75
76static 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),
80 { },
81};
82
83static const struct software_node apl_i2c_node = {
84 .properties = apl_i2c_properties,
85};
86
87static const struct intel_lpss_platform_info apl_i2c_info = {
88 .clk_rate = 133000000,
89 .swnode = &apl_i2c_node,
90};
91
92static const struct acpi_device_id intel_lpss_acpi_ids[] = {
93 /* SPT */
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 },
105 /* BXT */
106 { "80860AAC", (kernel_ulong_t)&bxt_i2c_info },
107 { "80860ABC", (kernel_ulong_t)&bxt_info },
108 { "80860AC2", (kernel_ulong_t)&bxt_info },
109 /* APL */
110 { "80865AAC", (kernel_ulong_t)&apl_i2c_info },
111 { "80865ABC", (kernel_ulong_t)&bxt_info },
112 { "80865AC2", (kernel_ulong_t)&bxt_info },
113 { }
114};
115MODULE_DEVICE_TABLE(acpi, intel_lpss_acpi_ids);
116
117static int intel_lpss_acpi_probe(struct platform_device *pdev)
118{
119 struct intel_lpss_platform_info *info;
120 const struct acpi_device_id *id;
121
122 id = acpi_match_device(intel_lpss_acpi_ids, &pdev->dev);
123 if (!id)
124 return -ENODEV;
125
126 info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info),
127 GFP_KERNEL);
128 if (!info)
129 return -ENOMEM;
130
131 info->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
132 info->irq = platform_get_irq(pdev, 0);
133
134 pm_runtime_set_active(&pdev->dev);
135 pm_runtime_enable(&pdev->dev);
136
137 return intel_lpss_probe(&pdev->dev, info);
138}
139
140static int intel_lpss_acpi_remove(struct platform_device *pdev)
141{
142 intel_lpss_remove(&pdev->dev);
143 pm_runtime_disable(&pdev->dev);
144
145 return 0;
146}
147
148static INTEL_LPSS_PM_OPS(intel_lpss_acpi_pm_ops);
149
150static struct platform_driver intel_lpss_acpi_driver = {
151 .probe = intel_lpss_acpi_probe,
152 .remove = intel_lpss_acpi_remove,
153 .driver = {
154 .name = "intel-lpss",
155 .acpi_match_table = intel_lpss_acpi_ids,
156 .pm = &intel_lpss_acpi_pm_ops,
157 },
158};
159
160module_platform_driver(intel_lpss_acpi_driver);
161
162MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
163MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
164MODULE_DESCRIPTION("Intel LPSS ACPI driver");
165MODULE_LICENSE("GPL v2");