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 struct property_set spt_i2c_pset = { 35 .properties = spt_i2c_properties, 36 }; 37 38 static const struct intel_lpss_platform_info spt_i2c_info = { 39 .clk_rate = 120000000, 40 .pset = &spt_i2c_pset, 41 }; 42 43 static const struct intel_lpss_platform_info bxt_info = { 44 .clk_rate = 100000000, 45 }; 46 47 static const struct intel_lpss_platform_info bxt_i2c_info = { 48 .clk_rate = 133000000, 49 }; 50 51 static const struct acpi_device_id intel_lpss_acpi_ids[] = { 52 /* SPT */ 53 { "INT3446", (kernel_ulong_t)&spt_i2c_info }, 54 { "INT3447", (kernel_ulong_t)&spt_i2c_info }, 55 /* BXT */ 56 { "80860AAC", (kernel_ulong_t)&bxt_i2c_info }, 57 { "80860ABC", (kernel_ulong_t)&bxt_info }, 58 { "80860AC2", (kernel_ulong_t)&bxt_info }, 59 /* APL */ 60 { "80865AAC", (kernel_ulong_t)&bxt_i2c_info }, 61 { "80865ABC", (kernel_ulong_t)&bxt_info }, 62 { "80865AC2", (kernel_ulong_t)&bxt_info }, 63 { } 64 }; 65 MODULE_DEVICE_TABLE(acpi, intel_lpss_acpi_ids); 66 67 static int intel_lpss_acpi_probe(struct platform_device *pdev) 68 { 69 struct intel_lpss_platform_info *info; 70 const struct acpi_device_id *id; 71 72 id = acpi_match_device(intel_lpss_acpi_ids, &pdev->dev); 73 if (!id) 74 return -ENODEV; 75 76 info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info), 77 GFP_KERNEL); 78 if (!info) 79 return -ENOMEM; 80 81 info->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); 82 info->irq = platform_get_irq(pdev, 0); 83 84 pm_runtime_set_active(&pdev->dev); 85 pm_runtime_enable(&pdev->dev); 86 87 return intel_lpss_probe(&pdev->dev, info); 88 } 89 90 static int intel_lpss_acpi_remove(struct platform_device *pdev) 91 { 92 intel_lpss_remove(&pdev->dev); 93 pm_runtime_disable(&pdev->dev); 94 95 return 0; 96 } 97 98 static INTEL_LPSS_PM_OPS(intel_lpss_acpi_pm_ops); 99 100 static struct platform_driver intel_lpss_acpi_driver = { 101 .probe = intel_lpss_acpi_probe, 102 .remove = intel_lpss_acpi_remove, 103 .driver = { 104 .name = "intel-lpss", 105 .acpi_match_table = intel_lpss_acpi_ids, 106 .pm = &intel_lpss_acpi_pm_ops, 107 }, 108 }; 109 110 module_platform_driver(intel_lpss_acpi_driver); 111 112 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>"); 113 MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>"); 114 MODULE_DESCRIPTION("Intel LPSS ACPI driver"); 115 MODULE_LICENSE("GPL v2"); 116