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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 struct property_entry spt_i2c_properties[] = {
22 PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 230),
23 { },
24};
25
26static const struct intel_lpss_platform_info spt_i2c_info = {
27 .clk_rate = 120000000,
28 .properties = spt_i2c_properties,
29};
30
31static const struct intel_lpss_platform_info bxt_info = {
32 .clk_rate = 100000000,
33};
34
35static struct property_entry bxt_i2c_properties[] = {
36 PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 42),
37 PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171),
38 PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208),
39 { },
40};
41
42static const struct intel_lpss_platform_info bxt_i2c_info = {
43 .clk_rate = 133000000,
44 .properties = bxt_i2c_properties,
45};
46
47static struct property_entry apl_i2c_properties[] = {
48 PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 207),
49 PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171),
50 PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208),
51 { },
52};
53
54static const struct intel_lpss_platform_info apl_i2c_info = {
55 .clk_rate = 133000000,
56 .properties = apl_i2c_properties,
57};
58
59static const struct acpi_device_id intel_lpss_acpi_ids[] = {
60 /* SPT */
61 { "INT3446", (kernel_ulong_t)&spt_i2c_info },
62 { "INT3447", (kernel_ulong_t)&spt_i2c_info },
63 /* BXT */
64 { "80860AAC", (kernel_ulong_t)&bxt_i2c_info },
65 { "80860ABC", (kernel_ulong_t)&bxt_info },
66 { "80860AC2", (kernel_ulong_t)&bxt_info },
67 /* APL */
68 { "80865AAC", (kernel_ulong_t)&apl_i2c_info },
69 { "80865ABC", (kernel_ulong_t)&bxt_info },
70 { "80865AC2", (kernel_ulong_t)&bxt_info },
71 { }
72};
73MODULE_DEVICE_TABLE(acpi, intel_lpss_acpi_ids);
74
75static int intel_lpss_acpi_probe(struct platform_device *pdev)
76{
77 struct intel_lpss_platform_info *info;
78 const struct acpi_device_id *id;
79
80 id = acpi_match_device(intel_lpss_acpi_ids, &pdev->dev);
81 if (!id)
82 return -ENODEV;
83
84 info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info),
85 GFP_KERNEL);
86 if (!info)
87 return -ENOMEM;
88
89 info->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
90 info->irq = platform_get_irq(pdev, 0);
91
92 pm_runtime_set_active(&pdev->dev);
93 pm_runtime_enable(&pdev->dev);
94
95 return intel_lpss_probe(&pdev->dev, info);
96}
97
98static int intel_lpss_acpi_remove(struct platform_device *pdev)
99{
100 intel_lpss_remove(&pdev->dev);
101 pm_runtime_disable(&pdev->dev);
102
103 return 0;
104}
105
106static INTEL_LPSS_PM_OPS(intel_lpss_acpi_pm_ops);
107
108static struct platform_driver intel_lpss_acpi_driver = {
109 .probe = intel_lpss_acpi_probe,
110 .remove = intel_lpss_acpi_remove,
111 .driver = {
112 .name = "intel-lpss",
113 .acpi_match_table = intel_lpss_acpi_ids,
114 .pm = &intel_lpss_acpi_pm_ops,
115 },
116};
117
118module_platform_driver(intel_lpss_acpi_driver);
119
120MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
121MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
122MODULE_DESCRIPTION("Intel LPSS ACPI driver");
123MODULE_LICENSE("GPL v2");