1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Intel LPSS ACPI support. 4 * 5 * Copyright (C) 2015, Intel Corporation 6 * 7 * Authors: Andy Shevchenko <andriy.shevchenko@linux.intel.com> 8 * Mika Westerberg <mika.westerberg@linux.intel.com> 9 */ 10 11 #include <linux/acpi.h> 12 #include <linux/ioport.h> 13 #include <linux/kernel.h> 14 #include <linux/module.h> 15 #include <linux/pm_runtime.h> 16 #include <linux/platform_device.h> 17 #include <linux/property.h> 18 19 #include "intel-lpss.h" 20 21 static struct property_entry spt_i2c_properties[] = { 22 PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 230), 23 { }, 24 }; 25 26 static const struct intel_lpss_platform_info spt_i2c_info = { 27 .clk_rate = 120000000, 28 .properties = spt_i2c_properties, 29 }; 30 31 static const struct intel_lpss_platform_info bxt_info = { 32 .clk_rate = 100000000, 33 }; 34 35 static struct property_entry bxt_i2c_properties[] = { 36 PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 42), 37 PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171), 38 PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208), 39 { }, 40 }; 41 42 static const struct intel_lpss_platform_info bxt_i2c_info = { 43 .clk_rate = 133000000, 44 .properties = bxt_i2c_properties, 45 }; 46 47 static struct property_entry apl_i2c_properties[] = { 48 PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 207), 49 PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171), 50 PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208), 51 { }, 52 }; 53 54 static const struct intel_lpss_platform_info apl_i2c_info = { 55 .clk_rate = 133000000, 56 .properties = apl_i2c_properties, 57 }; 58 59 static const struct acpi_device_id intel_lpss_acpi_ids[] = { 60 /* SPT */ 61 { "INT3446", (kernel_ulong_t)&spt_i2c_info }, 62 { "INT3447", (kernel_ulong_t)&spt_i2c_info }, 63 /* BXT */ 64 { "80860AAC", (kernel_ulong_t)&bxt_i2c_info }, 65 { "80860ABC", (kernel_ulong_t)&bxt_info }, 66 { "80860AC2", (kernel_ulong_t)&bxt_info }, 67 /* APL */ 68 { "80865AAC", (kernel_ulong_t)&apl_i2c_info }, 69 { "80865ABC", (kernel_ulong_t)&bxt_info }, 70 { "80865AC2", (kernel_ulong_t)&bxt_info }, 71 { } 72 }; 73 MODULE_DEVICE_TABLE(acpi, intel_lpss_acpi_ids); 74 75 static int intel_lpss_acpi_probe(struct platform_device *pdev) 76 { 77 struct intel_lpss_platform_info *info; 78 const struct acpi_device_id *id; 79 80 id = acpi_match_device(intel_lpss_acpi_ids, &pdev->dev); 81 if (!id) 82 return -ENODEV; 83 84 info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info), 85 GFP_KERNEL); 86 if (!info) 87 return -ENOMEM; 88 89 info->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); 90 info->irq = platform_get_irq(pdev, 0); 91 92 pm_runtime_set_active(&pdev->dev); 93 pm_runtime_enable(&pdev->dev); 94 95 return intel_lpss_probe(&pdev->dev, info); 96 } 97 98 static int intel_lpss_acpi_remove(struct platform_device *pdev) 99 { 100 intel_lpss_remove(&pdev->dev); 101 pm_runtime_disable(&pdev->dev); 102 103 return 0; 104 } 105 106 static INTEL_LPSS_PM_OPS(intel_lpss_acpi_pm_ops); 107 108 static struct platform_driver intel_lpss_acpi_driver = { 109 .probe = intel_lpss_acpi_probe, 110 .remove = intel_lpss_acpi_remove, 111 .driver = { 112 .name = "intel-lpss", 113 .acpi_match_table = intel_lpss_acpi_ids, 114 .pm = &intel_lpss_acpi_pm_ops, 115 }, 116 }; 117 118 module_platform_driver(intel_lpss_acpi_driver); 119 120 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>"); 121 MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>"); 122 MODULE_DESCRIPTION("Intel LPSS ACPI driver"); 123 MODULE_LICENSE("GPL v2"); 124