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> 21 #include <linux/property.h> 22 23 #include "intel-lpss.h" 24 25 static struct property_entry spt_i2c_properties[] = { 26 PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 230), 27 { }, 28 }; 29 30 static const struct intel_lpss_platform_info spt_i2c_info = { 31 .clk_rate = 120000000, 32 .properties = spt_i2c_properties, 33 }; 34 35 static const struct intel_lpss_platform_info bxt_info = { 36 .clk_rate = 100000000, 37 }; 38 39 static struct property_entry bxt_i2c_properties[] = { 40 PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 42), 41 PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171), 42 PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208), 43 { }, 44 }; 45 46 static const struct intel_lpss_platform_info bxt_i2c_info = { 47 .clk_rate = 133000000, 48 .properties = bxt_i2c_properties, 49 }; 50 51 static struct property_entry apl_i2c_properties[] = { 52 PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 207), 53 PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171), 54 PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208), 55 { }, 56 }; 57 58 static const struct intel_lpss_platform_info apl_i2c_info = { 59 .clk_rate = 133000000, 60 .properties = apl_i2c_properties, 61 }; 62 63 static const struct acpi_device_id intel_lpss_acpi_ids[] = { 64 /* SPT */ 65 { "INT3446", (kernel_ulong_t)&spt_i2c_info }, 66 { "INT3447", (kernel_ulong_t)&spt_i2c_info }, 67 /* BXT */ 68 { "80860AAC", (kernel_ulong_t)&bxt_i2c_info }, 69 { "80860ABC", (kernel_ulong_t)&bxt_info }, 70 { "80860AC2", (kernel_ulong_t)&bxt_info }, 71 /* APL */ 72 { "80865AAC", (kernel_ulong_t)&apl_i2c_info }, 73 { "80865ABC", (kernel_ulong_t)&bxt_info }, 74 { "80865AC2", (kernel_ulong_t)&bxt_info }, 75 { } 76 }; 77 MODULE_DEVICE_TABLE(acpi, intel_lpss_acpi_ids); 78 79 static int intel_lpss_acpi_probe(struct platform_device *pdev) 80 { 81 struct intel_lpss_platform_info *info; 82 const struct acpi_device_id *id; 83 84 id = acpi_match_device(intel_lpss_acpi_ids, &pdev->dev); 85 if (!id) 86 return -ENODEV; 87 88 info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info), 89 GFP_KERNEL); 90 if (!info) 91 return -ENOMEM; 92 93 info->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); 94 info->irq = platform_get_irq(pdev, 0); 95 96 pm_runtime_set_active(&pdev->dev); 97 pm_runtime_enable(&pdev->dev); 98 99 return intel_lpss_probe(&pdev->dev, info); 100 } 101 102 static int intel_lpss_acpi_remove(struct platform_device *pdev) 103 { 104 intel_lpss_remove(&pdev->dev); 105 pm_runtime_disable(&pdev->dev); 106 107 return 0; 108 } 109 110 static INTEL_LPSS_PM_OPS(intel_lpss_acpi_pm_ops); 111 112 static struct platform_driver intel_lpss_acpi_driver = { 113 .probe = intel_lpss_acpi_probe, 114 .remove = intel_lpss_acpi_remove, 115 .driver = { 116 .name = "intel-lpss", 117 .acpi_match_table = intel_lpss_acpi_ids, 118 .pm = &intel_lpss_acpi_pm_ops, 119 }, 120 }; 121 122 module_platform_driver(intel_lpss_acpi_driver); 123 124 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>"); 125 MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>"); 126 MODULE_DESCRIPTION("Intel LPSS ACPI driver"); 127 MODULE_LICENSE("GPL v2"); 128