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 const struct intel_lpss_platform_info spt_info = { 22 .clk_rate = 120000000, 23 }; 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 struct property_entry uart_properties[] = { 36 PROPERTY_ENTRY_U32("reg-io-width", 4), 37 PROPERTY_ENTRY_U32("reg-shift", 2), 38 PROPERTY_ENTRY_BOOL("snps,uart-16550-compatible"), 39 { }, 40 }; 41 42 static const struct intel_lpss_platform_info spt_uart_info = { 43 .clk_rate = 120000000, 44 .clk_con_id = "baudclk", 45 .properties = uart_properties, 46 }; 47 48 static const struct intel_lpss_platform_info bxt_info = { 49 .clk_rate = 100000000, 50 }; 51 52 static struct property_entry bxt_i2c_properties[] = { 53 PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 42), 54 PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171), 55 PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208), 56 { }, 57 }; 58 59 static const struct intel_lpss_platform_info bxt_i2c_info = { 60 .clk_rate = 133000000, 61 .properties = bxt_i2c_properties, 62 }; 63 64 static struct property_entry apl_i2c_properties[] = { 65 PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 207), 66 PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171), 67 PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208), 68 { }, 69 }; 70 71 static const struct intel_lpss_platform_info apl_i2c_info = { 72 .clk_rate = 133000000, 73 .properties = apl_i2c_properties, 74 }; 75 76 static const struct acpi_device_id intel_lpss_acpi_ids[] = { 77 /* SPT */ 78 { "INT3440", (kernel_ulong_t)&spt_info }, 79 { "INT3441", (kernel_ulong_t)&spt_info }, 80 { "INT3442", (kernel_ulong_t)&spt_i2c_info }, 81 { "INT3443", (kernel_ulong_t)&spt_i2c_info }, 82 { "INT3444", (kernel_ulong_t)&spt_i2c_info }, 83 { "INT3445", (kernel_ulong_t)&spt_i2c_info }, 84 { "INT3446", (kernel_ulong_t)&spt_i2c_info }, 85 { "INT3447", (kernel_ulong_t)&spt_i2c_info }, 86 { "INT3448", (kernel_ulong_t)&spt_uart_info }, 87 { "INT3449", (kernel_ulong_t)&spt_uart_info }, 88 { "INT344A", (kernel_ulong_t)&spt_uart_info }, 89 /* BXT */ 90 { "80860AAC", (kernel_ulong_t)&bxt_i2c_info }, 91 { "80860ABC", (kernel_ulong_t)&bxt_info }, 92 { "80860AC2", (kernel_ulong_t)&bxt_info }, 93 /* APL */ 94 { "80865AAC", (kernel_ulong_t)&apl_i2c_info }, 95 { "80865ABC", (kernel_ulong_t)&bxt_info }, 96 { "80865AC2", (kernel_ulong_t)&bxt_info }, 97 { } 98 }; 99 MODULE_DEVICE_TABLE(acpi, intel_lpss_acpi_ids); 100 101 static int intel_lpss_acpi_probe(struct platform_device *pdev) 102 { 103 struct intel_lpss_platform_info *info; 104 const struct acpi_device_id *id; 105 106 id = acpi_match_device(intel_lpss_acpi_ids, &pdev->dev); 107 if (!id) 108 return -ENODEV; 109 110 info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info), 111 GFP_KERNEL); 112 if (!info) 113 return -ENOMEM; 114 115 info->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); 116 info->irq = platform_get_irq(pdev, 0); 117 118 pm_runtime_set_active(&pdev->dev); 119 pm_runtime_enable(&pdev->dev); 120 121 return intel_lpss_probe(&pdev->dev, info); 122 } 123 124 static int intel_lpss_acpi_remove(struct platform_device *pdev) 125 { 126 intel_lpss_remove(&pdev->dev); 127 pm_runtime_disable(&pdev->dev); 128 129 return 0; 130 } 131 132 static INTEL_LPSS_PM_OPS(intel_lpss_acpi_pm_ops); 133 134 static struct platform_driver intel_lpss_acpi_driver = { 135 .probe = intel_lpss_acpi_probe, 136 .remove = intel_lpss_acpi_remove, 137 .driver = { 138 .name = "intel-lpss", 139 .acpi_match_table = intel_lpss_acpi_ids, 140 .pm = &intel_lpss_acpi_pm_ops, 141 }, 142 }; 143 144 module_platform_driver(intel_lpss_acpi_driver); 145 146 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>"); 147 MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>"); 148 MODULE_DESCRIPTION("Intel LPSS ACPI driver"); 149 MODULE_LICENSE("GPL v2"); 150