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 const struct intel_lpss_platform_info spt_info = { 26 .clk_rate = 120000000, 27 }; 28 29 static struct property_entry spt_i2c_properties[] = { 30 PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 230), 31 { }, 32 }; 33 34 static const struct intel_lpss_platform_info spt_i2c_info = { 35 .clk_rate = 120000000, 36 .properties = spt_i2c_properties, 37 }; 38 39 static const struct intel_lpss_platform_info bxt_info = { 40 .clk_rate = 100000000, 41 }; 42 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 50 static const struct intel_lpss_platform_info bxt_i2c_info = { 51 .clk_rate = 133000000, 52 .properties = bxt_i2c_properties, 53 }; 54 55 static const struct acpi_device_id intel_lpss_acpi_ids[] = { 56 /* SPT */ 57 { "INT3446", (kernel_ulong_t)&spt_i2c_info }, 58 { "INT3447", (kernel_ulong_t)&spt_i2c_info }, 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 }, 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"); 120