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_runtime.h> 19 #include <linux/platform_device.h> 20 #include <linux/property.h> 21 22 #include "intel-lpss.h" 23 24 static struct property_entry spt_i2c_properties[] = { 25 PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 230), 26 { }, 27 }; 28 29 static const struct intel_lpss_platform_info spt_i2c_info = { 30 .clk_rate = 120000000, 31 .properties = spt_i2c_properties, 32 }; 33 34 static const struct intel_lpss_platform_info bxt_info = { 35 .clk_rate = 100000000, 36 }; 37 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 45 static const struct intel_lpss_platform_info bxt_i2c_info = { 46 .clk_rate = 133000000, 47 .properties = bxt_i2c_properties, 48 }; 49 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 62 static const struct acpi_device_id intel_lpss_acpi_ids[] = { 63 /* SPT */ 64 { "INT3446", (kernel_ulong_t)&spt_i2c_info }, 65 { "INT3447", (kernel_ulong_t)&spt_i2c_info }, 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 */ 71 { "80865AAC", (kernel_ulong_t)&apl_i2c_info }, 72 { "80865ABC", (kernel_ulong_t)&bxt_info }, 73 { "80865AC2", (kernel_ulong_t)&bxt_info }, 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"); 127