projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 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> | |
| 18 | #include <linux/pm.h> | |
| 19 | #include <linux/pm_runtime.h> | |
| 20 | #include <linux/platform_device.h> | |
| 028af594 | 21 | #include <linux/property.h> |
| 4b45efe8 AS |
22 | |
| 23 | #include "intel-lpss.h" | |
| 24 | ||
| 25 | static const struct intel_lpss_platform_info spt_info = { | |
| 26 | .clk_rate = 120000000, | |
| 27 | }; | |
| 28 | ||
| 028af594 MW |
29 | static struct property_entry spt_i2c_properties[] = { |
| 30 | PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 230), | |
| 31 | { }, | |
| 32 | }; | |
| 33 | ||
| 028af594 MW |
34 | static const struct intel_lpss_platform_info spt_i2c_info = { |
| 35 | .clk_rate = 120000000, | |
| f4d05266 | 36 | .properties = spt_i2c_properties, |
| 028af594 MW |
37 | }; |
| 38 | ||
| 6a636ec0 MW |
39 | static const struct intel_lpss_platform_info bxt_info = { |
| 40 | .clk_rate = 100000000, | |
| 41 | }; | |
| 42 | ||
| 0343b2f4 MW |
43 | static struct property_entry bxt_i2c_properties[] = { |
| 44 | PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 42), | |
| 45 | PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171), | |
| 46 | PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208), | |
| 47 | { }, | |
| 48 | }; | |
| 49 | ||
| 6a636ec0 MW |
50 | static const struct intel_lpss_platform_info bxt_i2c_info = { |
| 51 | .clk_rate = 133000000, | |
| f4d05266 | 52 | .properties = bxt_i2c_properties, |
| 6a636ec0 MW |
53 | }; |
| 54 | ||
| 4b45efe8 AS |
55 | static const struct acpi_device_id intel_lpss_acpi_ids[] = { |
| 56 | /* SPT */ | |
| 028af594 MW |
57 | { "INT3446", (kernel_ulong_t)&spt_i2c_info }, |
| 58 | { "INT3447", (kernel_ulong_t)&spt_i2c_info }, | |
| 6a636ec0 MW |
59 | /* BXT */ |
| 60 | { "80860AAC", (kernel_ulong_t)&bxt_i2c_info }, | |
| 61 | { "80860ABC", (kernel_ulong_t)&bxt_info }, | |
| 62 | { "80860AC2", (kernel_ulong_t)&bxt_info }, | |
| 63 | /* APL */ | |
| 64 | { "80865AAC", (kernel_ulong_t)&bxt_i2c_info }, | |
| 65 | { "80865ABC", (kernel_ulong_t)&bxt_info }, | |
| 66 | { "80865AC2", (kernel_ulong_t)&bxt_info }, | |
| 4b45efe8 AS |
67 | { } |
| 68 | }; | |
| 69 | MODULE_DEVICE_TABLE(acpi, intel_lpss_acpi_ids); | |
| 70 | ||
| 71 | static int intel_lpss_acpi_probe(struct platform_device *pdev) | |
| 72 | { | |
| 73 | struct intel_lpss_platform_info *info; | |
| 74 | const struct acpi_device_id *id; | |
| 75 | ||
| 76 | id = acpi_match_device(intel_lpss_acpi_ids, &pdev->dev); | |
| 77 | if (!id) | |
| 78 | return -ENODEV; | |
| 79 | ||
| 80 | info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info), | |
| 81 | GFP_KERNEL); | |
| 82 | if (!info) | |
| 83 | return -ENOMEM; | |
| 84 | ||
| 85 | info->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
| 86 | info->irq = platform_get_irq(pdev, 0); | |
| 87 | ||
| 88 | pm_runtime_set_active(&pdev->dev); | |
| 89 | pm_runtime_enable(&pdev->dev); | |
| 90 | ||
| 91 | return intel_lpss_probe(&pdev->dev, info); | |
| 92 | } | |
| 93 | ||
| 94 | static int intel_lpss_acpi_remove(struct platform_device *pdev) | |
| 95 | { | |
| 96 | intel_lpss_remove(&pdev->dev); | |
| 97 | pm_runtime_disable(&pdev->dev); | |
| 98 | ||
| 99 | return 0; | |
| 100 | } | |
| 101 | ||
| 102 | static INTEL_LPSS_PM_OPS(intel_lpss_acpi_pm_ops); | |
| 103 | ||
| 104 | static struct platform_driver intel_lpss_acpi_driver = { | |
| 105 | .probe = intel_lpss_acpi_probe, | |
| 106 | .remove = intel_lpss_acpi_remove, | |
| 107 | .driver = { | |
| 108 | .name = "intel-lpss", | |
| 109 | .acpi_match_table = intel_lpss_acpi_ids, | |
| 110 | .pm = &intel_lpss_acpi_pm_ops, | |
| 111 | }, | |
| 112 | }; | |
| 113 | ||
| 114 | module_platform_driver(intel_lpss_acpi_driver); | |
| 115 | ||
| 116 | MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>"); | |
| 117 | MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>"); | |
| 118 | MODULE_DESCRIPTION("Intel LPSS ACPI driver"); | |
| 119 | MODULE_LICENSE("GPL v2"); |