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/device.h> 12 #include <linux/gfp_types.h> 13 #include <linux/ioport.h> 14 #include <linux/mod_devicetable.h> 15 #include <linux/module.h> 16 #include <linux/pm.h> 17 #include <linux/pm_runtime.h> 18 #include <linux/platform_device.h> 19 #include <linux/property.h> 20 21 #include <linux/pxa2xx_ssp.h> 22 23 #include <asm/errno.h> 24 25 #include "intel-lpss.h" 26 27 static const struct property_entry spt_spi_properties[] = { 28 PROPERTY_ENTRY_U32("intel,spi-pxa2xx-type", LPSS_SPT_SSP), 29 { } 30 }; 31 32 static const struct software_node spt_spi_node = { 33 .properties = spt_spi_properties, 34 }; 35 36 static const struct intel_lpss_platform_info spt_info = { 37 .clk_rate = 120000000, 38 .swnode = &spt_spi_node, 39 }; 40 41 static const struct property_entry spt_i2c_properties[] = { 42 PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 230), 43 { }, 44 }; 45 46 static const struct software_node spt_i2c_node = { 47 .properties = spt_i2c_properties, 48 }; 49 50 static const struct intel_lpss_platform_info spt_i2c_info = { 51 .clk_rate = 120000000, 52 .swnode = &spt_i2c_node, 53 }; 54 55 static const struct property_entry uart_properties[] = { 56 PROPERTY_ENTRY_U32("reg-io-width", 4), 57 PROPERTY_ENTRY_U32("reg-shift", 2), 58 PROPERTY_ENTRY_BOOL("snps,uart-16550-compatible"), 59 { }, 60 }; 61 62 static const struct software_node uart_node = { 63 .properties = uart_properties, 64 }; 65 66 static const struct intel_lpss_platform_info spt_uart_info = { 67 .clk_rate = 120000000, 68 .clk_con_id = "baudclk", 69 .swnode = &uart_node, 70 }; 71 72 static const struct property_entry bxt_spi_properties[] = { 73 PROPERTY_ENTRY_U32("intel,spi-pxa2xx-type", LPSS_BXT_SSP), 74 { } 75 }; 76 77 static const struct software_node bxt_spi_node = { 78 .properties = bxt_spi_properties, 79 }; 80 81 static const struct intel_lpss_platform_info bxt_info = { 82 .clk_rate = 100000000, 83 .swnode = &bxt_spi_node, 84 }; 85 86 static const struct property_entry bxt_i2c_properties[] = { 87 PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 42), 88 PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171), 89 PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208), 90 { }, 91 }; 92 93 static const struct software_node bxt_i2c_node = { 94 .properties = bxt_i2c_properties, 95 }; 96 97 static const struct intel_lpss_platform_info bxt_i2c_info = { 98 .clk_rate = 133000000, 99 .swnode = &bxt_i2c_node, 100 }; 101 102 static const struct property_entry apl_i2c_properties[] = { 103 PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 207), 104 PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171), 105 PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208), 106 { }, 107 }; 108 109 static const struct software_node apl_i2c_node = { 110 .properties = apl_i2c_properties, 111 }; 112 113 static const struct intel_lpss_platform_info apl_i2c_info = { 114 .clk_rate = 133000000, 115 .swnode = &apl_i2c_node, 116 }; 117 118 static const struct property_entry cnl_spi_properties[] = { 119 PROPERTY_ENTRY_U32("intel,spi-pxa2xx-type", LPSS_CNL_SSP), 120 { } 121 }; 122 123 static const struct software_node cnl_spi_node = { 124 .properties = cnl_spi_properties, 125 }; 126 127 static const struct intel_lpss_platform_info cnl_info = { 128 .clk_rate = 120000000, 129 .swnode = &cnl_spi_node, 130 }; 131 132 static const struct intel_lpss_platform_info cnl_i2c_info = { 133 .clk_rate = 216000000, 134 .swnode = &spt_i2c_node, 135 }; 136 137 static const struct acpi_device_id intel_lpss_acpi_ids[] = { 138 /* SPT */ 139 { "INT3440", (kernel_ulong_t)&spt_info }, 140 { "INT3441", (kernel_ulong_t)&spt_info }, 141 { "INT3442", (kernel_ulong_t)&spt_i2c_info }, 142 { "INT3443", (kernel_ulong_t)&spt_i2c_info }, 143 { "INT3444", (kernel_ulong_t)&spt_i2c_info }, 144 { "INT3445", (kernel_ulong_t)&spt_i2c_info }, 145 { "INT3446", (kernel_ulong_t)&spt_i2c_info }, 146 { "INT3447", (kernel_ulong_t)&spt_i2c_info }, 147 { "INT3448", (kernel_ulong_t)&spt_uart_info }, 148 { "INT3449", (kernel_ulong_t)&spt_uart_info }, 149 { "INT344A", (kernel_ulong_t)&spt_uart_info }, 150 /* CNL */ 151 { "INT34B0", (kernel_ulong_t)&cnl_info }, 152 { "INT34B1", (kernel_ulong_t)&cnl_info }, 153 { "INT34B2", (kernel_ulong_t)&cnl_i2c_info }, 154 { "INT34B3", (kernel_ulong_t)&cnl_i2c_info }, 155 { "INT34B4", (kernel_ulong_t)&cnl_i2c_info }, 156 { "INT34B5", (kernel_ulong_t)&cnl_i2c_info }, 157 { "INT34B6", (kernel_ulong_t)&cnl_i2c_info }, 158 { "INT34B7", (kernel_ulong_t)&cnl_i2c_info }, 159 { "INT34B8", (kernel_ulong_t)&spt_uart_info }, 160 { "INT34B9", (kernel_ulong_t)&spt_uart_info }, 161 { "INT34BA", (kernel_ulong_t)&spt_uart_info }, 162 { "INT34BC", (kernel_ulong_t)&cnl_info }, 163 /* BXT */ 164 { "80860AAC", (kernel_ulong_t)&bxt_i2c_info }, 165 { "80860ABC", (kernel_ulong_t)&bxt_info }, 166 { "80860AC2", (kernel_ulong_t)&bxt_info }, 167 /* APL */ 168 { "80865AAC", (kernel_ulong_t)&apl_i2c_info }, 169 { "80865ABC", (kernel_ulong_t)&bxt_info }, 170 { "80865AC2", (kernel_ulong_t)&bxt_info }, 171 { } 172 }; 173 MODULE_DEVICE_TABLE(acpi, intel_lpss_acpi_ids); 174 175 static int intel_lpss_acpi_probe(struct platform_device *pdev) 176 { 177 const struct intel_lpss_platform_info *data; 178 struct intel_lpss_platform_info *info; 179 int ret; 180 181 data = device_get_match_data(&pdev->dev); 182 if (!data) 183 return -ENODEV; 184 185 info = devm_kmemdup(&pdev->dev, data, sizeof(*info), GFP_KERNEL); 186 if (!info) 187 return -ENOMEM; 188 189 /* No need to check mem and irq here as intel_lpss_probe() does it for us */ 190 info->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); 191 info->irq = platform_get_irq(pdev, 0); 192 193 ret = intel_lpss_probe(&pdev->dev, info); 194 if (ret) 195 return ret; 196 197 pm_runtime_set_active(&pdev->dev); 198 pm_runtime_enable(&pdev->dev); 199 200 return 0; 201 } 202 203 static void intel_lpss_acpi_remove(struct platform_device *pdev) 204 { 205 intel_lpss_remove(&pdev->dev); 206 pm_runtime_disable(&pdev->dev); 207 } 208 209 static struct platform_driver intel_lpss_acpi_driver = { 210 .probe = intel_lpss_acpi_probe, 211 .remove = intel_lpss_acpi_remove, 212 .driver = { 213 .name = "intel-lpss", 214 .acpi_match_table = intel_lpss_acpi_ids, 215 .pm = pm_ptr(&intel_lpss_pm_ops), 216 }, 217 }; 218 219 module_platform_driver(intel_lpss_acpi_driver); 220 221 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>"); 222 MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>"); 223 MODULE_DESCRIPTION("Intel LPSS ACPI driver"); 224 MODULE_LICENSE("GPL v2"); 225 MODULE_IMPORT_NS(INTEL_LPSS); 226