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 #include <linux/pxa2xx_ssp.h> 19 20 #include "intel-lpss.h" 21 22 static const struct property_entry spt_spi_properties[] = { 23 PROPERTY_ENTRY_U32("intel,spi-pxa2xx-type", LPSS_SPT_SSP), 24 { } 25 }; 26 27 static const struct software_node spt_spi_node = { 28 .properties = spt_spi_properties, 29 }; 30 31 static const struct intel_lpss_platform_info spt_info = { 32 .clk_rate = 120000000, 33 .swnode = &spt_spi_node, 34 }; 35 36 static const struct property_entry spt_i2c_properties[] = { 37 PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 230), 38 { }, 39 }; 40 41 static const struct software_node spt_i2c_node = { 42 .properties = spt_i2c_properties, 43 }; 44 45 static const struct intel_lpss_platform_info spt_i2c_info = { 46 .clk_rate = 120000000, 47 .swnode = &spt_i2c_node, 48 }; 49 50 static const struct property_entry uart_properties[] = { 51 PROPERTY_ENTRY_U32("reg-io-width", 4), 52 PROPERTY_ENTRY_U32("reg-shift", 2), 53 PROPERTY_ENTRY_BOOL("snps,uart-16550-compatible"), 54 { }, 55 }; 56 57 static const struct software_node uart_node = { 58 .properties = uart_properties, 59 }; 60 61 static const struct intel_lpss_platform_info spt_uart_info = { 62 .clk_rate = 120000000, 63 .clk_con_id = "baudclk", 64 .swnode = &uart_node, 65 }; 66 67 static const struct property_entry bxt_spi_properties[] = { 68 PROPERTY_ENTRY_U32("intel,spi-pxa2xx-type", LPSS_BXT_SSP), 69 { } 70 }; 71 72 static const struct software_node bxt_spi_node = { 73 .properties = bxt_spi_properties, 74 }; 75 76 static const struct intel_lpss_platform_info bxt_info = { 77 .clk_rate = 100000000, 78 .swnode = &bxt_spi_node, 79 }; 80 81 static const struct property_entry bxt_i2c_properties[] = { 82 PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 42), 83 PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171), 84 PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208), 85 { }, 86 }; 87 88 static const struct software_node bxt_i2c_node = { 89 .properties = bxt_i2c_properties, 90 }; 91 92 static const struct intel_lpss_platform_info bxt_i2c_info = { 93 .clk_rate = 133000000, 94 .swnode = &bxt_i2c_node, 95 }; 96 97 static const struct property_entry apl_i2c_properties[] = { 98 PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 207), 99 PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171), 100 PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208), 101 { }, 102 }; 103 104 static const struct software_node apl_i2c_node = { 105 .properties = apl_i2c_properties, 106 }; 107 108 static const struct intel_lpss_platform_info apl_i2c_info = { 109 .clk_rate = 133000000, 110 .swnode = &apl_i2c_node, 111 }; 112 113 static const struct property_entry cnl_spi_properties[] = { 114 PROPERTY_ENTRY_U32("intel,spi-pxa2xx-type", LPSS_CNL_SSP), 115 { } 116 }; 117 118 static const struct software_node cnl_spi_node = { 119 .properties = cnl_spi_properties, 120 }; 121 122 static const struct intel_lpss_platform_info cnl_info = { 123 .clk_rate = 120000000, 124 .swnode = &cnl_spi_node, 125 }; 126 127 static const struct intel_lpss_platform_info cnl_i2c_info = { 128 .clk_rate = 216000000, 129 .swnode = &spt_i2c_node, 130 }; 131 132 static const struct acpi_device_id intel_lpss_acpi_ids[] = { 133 /* SPT */ 134 { "INT3440", (kernel_ulong_t)&spt_info }, 135 { "INT3441", (kernel_ulong_t)&spt_info }, 136 { "INT3442", (kernel_ulong_t)&spt_i2c_info }, 137 { "INT3443", (kernel_ulong_t)&spt_i2c_info }, 138 { "INT3444", (kernel_ulong_t)&spt_i2c_info }, 139 { "INT3445", (kernel_ulong_t)&spt_i2c_info }, 140 { "INT3446", (kernel_ulong_t)&spt_i2c_info }, 141 { "INT3447", (kernel_ulong_t)&spt_i2c_info }, 142 { "INT3448", (kernel_ulong_t)&spt_uart_info }, 143 { "INT3449", (kernel_ulong_t)&spt_uart_info }, 144 { "INT344A", (kernel_ulong_t)&spt_uart_info }, 145 /* CNL */ 146 { "INT34B0", (kernel_ulong_t)&cnl_info }, 147 { "INT34B1", (kernel_ulong_t)&cnl_info }, 148 { "INT34B2", (kernel_ulong_t)&cnl_i2c_info }, 149 { "INT34B3", (kernel_ulong_t)&cnl_i2c_info }, 150 { "INT34B4", (kernel_ulong_t)&cnl_i2c_info }, 151 { "INT34B5", (kernel_ulong_t)&cnl_i2c_info }, 152 { "INT34B6", (kernel_ulong_t)&cnl_i2c_info }, 153 { "INT34B7", (kernel_ulong_t)&cnl_i2c_info }, 154 { "INT34B8", (kernel_ulong_t)&spt_uart_info }, 155 { "INT34B9", (kernel_ulong_t)&spt_uart_info }, 156 { "INT34BA", (kernel_ulong_t)&spt_uart_info }, 157 { "INT34BC", (kernel_ulong_t)&cnl_info }, 158 /* BXT */ 159 { "80860AAC", (kernel_ulong_t)&bxt_i2c_info }, 160 { "80860ABC", (kernel_ulong_t)&bxt_info }, 161 { "80860AC2", (kernel_ulong_t)&bxt_info }, 162 /* APL */ 163 { "80865AAC", (kernel_ulong_t)&apl_i2c_info }, 164 { "80865ABC", (kernel_ulong_t)&bxt_info }, 165 { "80865AC2", (kernel_ulong_t)&bxt_info }, 166 { } 167 }; 168 MODULE_DEVICE_TABLE(acpi, intel_lpss_acpi_ids); 169 170 static int intel_lpss_acpi_probe(struct platform_device *pdev) 171 { 172 struct intel_lpss_platform_info *info; 173 const struct acpi_device_id *id; 174 int ret; 175 176 id = acpi_match_device(intel_lpss_acpi_ids, &pdev->dev); 177 if (!id) 178 return -ENODEV; 179 180 info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info), 181 GFP_KERNEL); 182 if (!info) 183 return -ENOMEM; 184 185 info->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); 186 info->irq = platform_get_irq(pdev, 0); 187 188 ret = intel_lpss_probe(&pdev->dev, info); 189 if (ret) 190 return ret; 191 192 pm_runtime_set_active(&pdev->dev); 193 pm_runtime_enable(&pdev->dev); 194 195 return 0; 196 } 197 198 static int intel_lpss_acpi_remove(struct platform_device *pdev) 199 { 200 intel_lpss_remove(&pdev->dev); 201 pm_runtime_disable(&pdev->dev); 202 203 return 0; 204 } 205 206 static INTEL_LPSS_PM_OPS(intel_lpss_acpi_pm_ops); 207 208 static struct platform_driver intel_lpss_acpi_driver = { 209 .probe = intel_lpss_acpi_probe, 210 .remove = intel_lpss_acpi_remove, 211 .driver = { 212 .name = "intel-lpss", 213 .acpi_match_table = intel_lpss_acpi_ids, 214 .pm = &intel_lpss_acpi_pm_ops, 215 }, 216 }; 217 218 module_platform_driver(intel_lpss_acpi_driver); 219 220 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>"); 221 MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>"); 222 MODULE_DESCRIPTION("Intel LPSS ACPI driver"); 223 MODULE_LICENSE("GPL v2"); 224