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4b45efe8 AS |
1 | /* |
2 | * Intel LPSS ACPI support. | |
3 | * | |
4 | * Copyright (C) 2015, Intel Corporation | |
5 | * | |
6 | * Authors: Andy Shevchenko <andriy.shevchenko@linux.intel.com> | |
7 | * Mika Westerberg <mika.westerberg@linux.intel.com> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
13 | ||
14 | #include <linux/acpi.h> | |
15 | #include <linux/ioport.h> | |
16 | #include <linux/kernel.h> | |
17 | #include <linux/module.h> | |
4b45efe8 AS |
18 | #include <linux/pm_runtime.h> |
19 | #include <linux/platform_device.h> | |
028af594 | 20 | #include <linux/property.h> |
4b45efe8 AS |
21 | |
22 | #include "intel-lpss.h" | |
23 | ||
028af594 MW |
24 | static struct property_entry spt_i2c_properties[] = { |
25 | PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 230), | |
26 | { }, | |
27 | }; | |
28 | ||
028af594 MW |
29 | static const struct intel_lpss_platform_info spt_i2c_info = { |
30 | .clk_rate = 120000000, | |
f4d05266 | 31 | .properties = spt_i2c_properties, |
028af594 MW |
32 | }; |
33 | ||
6a636ec0 MW |
34 | static const struct intel_lpss_platform_info bxt_info = { |
35 | .clk_rate = 100000000, | |
36 | }; | |
37 | ||
0343b2f4 MW |
38 | static struct property_entry bxt_i2c_properties[] = { |
39 | PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 42), | |
40 | PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171), | |
41 | PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208), | |
42 | { }, | |
43 | }; | |
44 | ||
6a636ec0 MW |
45 | static const struct intel_lpss_platform_info bxt_i2c_info = { |
46 | .clk_rate = 133000000, | |
f4d05266 | 47 | .properties = bxt_i2c_properties, |
6a636ec0 MW |
48 | }; |
49 | ||
c50cdd62 JN |
50 | static struct property_entry apl_i2c_properties[] = { |
51 | PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 207), | |
52 | PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171), | |
53 | PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208), | |
54 | { }, | |
55 | }; | |
56 | ||
57 | static const struct intel_lpss_platform_info apl_i2c_info = { | |
58 | .clk_rate = 133000000, | |
59 | .properties = apl_i2c_properties, | |
60 | }; | |
61 | ||
4b45efe8 AS |
62 | static const struct acpi_device_id intel_lpss_acpi_ids[] = { |
63 | /* SPT */ | |
028af594 MW |
64 | { "INT3446", (kernel_ulong_t)&spt_i2c_info }, |
65 | { "INT3447", (kernel_ulong_t)&spt_i2c_info }, | |
6a636ec0 MW |
66 | /* BXT */ |
67 | { "80860AAC", (kernel_ulong_t)&bxt_i2c_info }, | |
68 | { "80860ABC", (kernel_ulong_t)&bxt_info }, | |
69 | { "80860AC2", (kernel_ulong_t)&bxt_info }, | |
70 | /* APL */ | |
c50cdd62 | 71 | { "80865AAC", (kernel_ulong_t)&apl_i2c_info }, |
6a636ec0 MW |
72 | { "80865ABC", (kernel_ulong_t)&bxt_info }, |
73 | { "80865AC2", (kernel_ulong_t)&bxt_info }, | |
4b45efe8 AS |
74 | { } |
75 | }; | |
76 | MODULE_DEVICE_TABLE(acpi, intel_lpss_acpi_ids); | |
77 | ||
78 | static int intel_lpss_acpi_probe(struct platform_device *pdev) | |
79 | { | |
80 | struct intel_lpss_platform_info *info; | |
81 | const struct acpi_device_id *id; | |
82 | ||
83 | id = acpi_match_device(intel_lpss_acpi_ids, &pdev->dev); | |
84 | if (!id) | |
85 | return -ENODEV; | |
86 | ||
87 | info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info), | |
88 | GFP_KERNEL); | |
89 | if (!info) | |
90 | return -ENOMEM; | |
91 | ||
92 | info->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
93 | info->irq = platform_get_irq(pdev, 0); | |
94 | ||
95 | pm_runtime_set_active(&pdev->dev); | |
96 | pm_runtime_enable(&pdev->dev); | |
97 | ||
98 | return intel_lpss_probe(&pdev->dev, info); | |
99 | } | |
100 | ||
101 | static int intel_lpss_acpi_remove(struct platform_device *pdev) | |
102 | { | |
103 | intel_lpss_remove(&pdev->dev); | |
104 | pm_runtime_disable(&pdev->dev); | |
105 | ||
106 | return 0; | |
107 | } | |
108 | ||
109 | static INTEL_LPSS_PM_OPS(intel_lpss_acpi_pm_ops); | |
110 | ||
111 | static struct platform_driver intel_lpss_acpi_driver = { | |
112 | .probe = intel_lpss_acpi_probe, | |
113 | .remove = intel_lpss_acpi_remove, | |
114 | .driver = { | |
115 | .name = "intel-lpss", | |
116 | .acpi_match_table = intel_lpss_acpi_ids, | |
117 | .pm = &intel_lpss_acpi_pm_ops, | |
118 | }, | |
119 | }; | |
120 | ||
121 | module_platform_driver(intel_lpss_acpi_driver); | |
122 | ||
123 | MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>"); | |
124 | MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>"); | |
125 | MODULE_DESCRIPTION("Intel LPSS ACPI driver"); | |
126 | MODULE_LICENSE("GPL v2"); |