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