1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * AMD ACPI support for ACPI2platform device. 4 * 5 * Copyright (c) 2014,2015 AMD Corporation. 6 * Authors: Ken Xue <Ken.Xue@amd.com> 7 * Wu, Jeff <Jeff.Wu@amd.com> 8 */ 9 10 #include <linux/acpi.h> 11 #include <linux/clkdev.h> 12 #include <linux/clk-provider.h> 13 #include <linux/err.h> 14 #include <linux/io.h> 15 #include <linux/platform_data/clk-fch.h> 16 #include <linux/platform_device.h> 17 18 #include "internal.h" 19 20 struct apd_private_data; 21 22 /** 23 * struct apd_device_desc - a descriptor for apd device 24 * @fixed_clk_rate: fixed rate input clock source for acpi device; 25 * 0 means no fixed rate input clock source 26 * @properties: build-in properties of the device such as UART 27 * @setup: a hook routine to set device resource during create platform device 28 * 29 * Device description defined as acpi_device_id.driver_data 30 */ 31 struct apd_device_desc { 32 unsigned int fixed_clk_rate; 33 struct property_entry *properties; 34 int (*setup)(struct apd_private_data *pdata); 35 }; 36 37 struct apd_private_data { 38 struct clk *clk; 39 struct acpi_device *adev; 40 const struct apd_device_desc *dev_desc; 41 }; 42 43 #if defined(CONFIG_X86_AMD_PLATFORM_DEVICE) || defined(CONFIG_ARM64) 44 #define APD_ADDR(desc) ((unsigned long)&desc) 45 46 static int acpi_apd_setup(struct apd_private_data *pdata) 47 { 48 const struct apd_device_desc *dev_desc = pdata->dev_desc; 49 struct clk *clk; 50 51 if (dev_desc->fixed_clk_rate) { 52 clk = clk_register_fixed_rate(&pdata->adev->dev, 53 dev_name(&pdata->adev->dev), 54 NULL, 0, dev_desc->fixed_clk_rate); 55 clk_register_clkdev(clk, NULL, dev_name(&pdata->adev->dev)); 56 pdata->clk = clk; 57 } 58 59 return 0; 60 } 61 62 #ifdef CONFIG_X86_AMD_PLATFORM_DEVICE 63 64 static int fch_misc_setup(struct apd_private_data *pdata) 65 { 66 struct acpi_device *adev = pdata->adev; 67 const union acpi_object *obj; 68 struct platform_device *clkdev; 69 struct fch_clk_data *clk_data; 70 struct resource_entry *rentry; 71 struct list_head resource_list; 72 int ret; 73 74 clk_data = devm_kzalloc(&adev->dev, sizeof(*clk_data), GFP_KERNEL); 75 if (!clk_data) 76 return -ENOMEM; 77 78 INIT_LIST_HEAD(&resource_list); 79 ret = acpi_dev_get_memory_resources(adev, &resource_list); 80 if (ret < 0) 81 return -ENOENT; 82 83 if (!acpi_dev_get_property(adev, "clk-name", ACPI_TYPE_STRING, &obj)) { 84 clk_data->name = devm_kzalloc(&adev->dev, obj->string.length, 85 GFP_KERNEL); 86 87 strcpy(clk_data->name, obj->string.pointer); 88 } else { 89 /* Set default name to mclk if entry missing in firmware */ 90 clk_data->name = "mclk"; 91 } 92 93 list_for_each_entry(rentry, &resource_list, node) { 94 clk_data->base = devm_ioremap(&adev->dev, rentry->res->start, 95 resource_size(rentry->res)); 96 break; 97 } 98 if (!clk_data->base) 99 return -ENOMEM; 100 101 acpi_dev_free_resource_list(&resource_list); 102 103 clkdev = platform_device_register_data(&adev->dev, "clk-fch", 104 PLATFORM_DEVID_NONE, clk_data, 105 sizeof(*clk_data)); 106 return PTR_ERR_OR_ZERO(clkdev); 107 } 108 109 static const struct apd_device_desc cz_i2c_desc = { 110 .setup = acpi_apd_setup, 111 .fixed_clk_rate = 133000000, 112 }; 113 114 static const struct apd_device_desc wt_i2c_desc = { 115 .setup = acpi_apd_setup, 116 .fixed_clk_rate = 150000000, 117 }; 118 119 static struct property_entry uart_properties[] = { 120 PROPERTY_ENTRY_U32("reg-io-width", 4), 121 PROPERTY_ENTRY_U32("reg-shift", 2), 122 PROPERTY_ENTRY_BOOL("snps,uart-16550-compatible"), 123 { }, 124 }; 125 126 static const struct apd_device_desc cz_uart_desc = { 127 .setup = acpi_apd_setup, 128 .fixed_clk_rate = 48000000, 129 .properties = uart_properties, 130 }; 131 132 static const struct apd_device_desc fch_misc_desc = { 133 .setup = fch_misc_setup, 134 }; 135 #endif /* CONFIG_X86_AMD_PLATFORM_DEVICE */ 136 137 #ifdef CONFIG_ARM64 138 static const struct apd_device_desc xgene_i2c_desc = { 139 .setup = acpi_apd_setup, 140 .fixed_clk_rate = 100000000, 141 }; 142 143 static const struct apd_device_desc vulcan_spi_desc = { 144 .setup = acpi_apd_setup, 145 .fixed_clk_rate = 133000000, 146 }; 147 148 static const struct apd_device_desc hip07_i2c_desc = { 149 .setup = acpi_apd_setup, 150 .fixed_clk_rate = 200000000, 151 }; 152 153 static const struct apd_device_desc hip08_i2c_desc = { 154 .setup = acpi_apd_setup, 155 .fixed_clk_rate = 250000000, 156 }; 157 158 static const struct apd_device_desc hip08_lite_i2c_desc = { 159 .setup = acpi_apd_setup, 160 .fixed_clk_rate = 125000000, 161 }; 162 163 static const struct apd_device_desc thunderx2_i2c_desc = { 164 .setup = acpi_apd_setup, 165 .fixed_clk_rate = 125000000, 166 }; 167 168 static const struct apd_device_desc nxp_i2c_desc = { 169 .setup = acpi_apd_setup, 170 .fixed_clk_rate = 350000000, 171 }; 172 173 static const struct apd_device_desc hip08_spi_desc = { 174 .setup = acpi_apd_setup, 175 .fixed_clk_rate = 250000000, 176 }; 177 #endif /* CONFIG_ARM64 */ 178 179 #endif 180 181 /* 182 * Create platform device during acpi scan attach handle. 183 * Return value > 0 on success of creating device. 184 */ 185 static int acpi_apd_create_device(struct acpi_device *adev, 186 const struct acpi_device_id *id) 187 { 188 const struct apd_device_desc *dev_desc = (void *)id->driver_data; 189 struct apd_private_data *pdata; 190 struct platform_device *pdev; 191 int ret; 192 193 if (!dev_desc) { 194 pdev = acpi_create_platform_device(adev, NULL); 195 return IS_ERR_OR_NULL(pdev) ? PTR_ERR(pdev) : 1; 196 } 197 198 pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); 199 if (!pdata) 200 return -ENOMEM; 201 202 pdata->adev = adev; 203 pdata->dev_desc = dev_desc; 204 205 if (dev_desc->setup) { 206 ret = dev_desc->setup(pdata); 207 if (ret) 208 goto err_out; 209 } 210 211 adev->driver_data = pdata; 212 pdev = acpi_create_platform_device(adev, dev_desc->properties); 213 if (!IS_ERR_OR_NULL(pdev)) 214 return 1; 215 216 ret = PTR_ERR(pdev); 217 adev->driver_data = NULL; 218 219 err_out: 220 kfree(pdata); 221 return ret; 222 } 223 224 static const struct acpi_device_id acpi_apd_device_ids[] = { 225 /* Generic apd devices */ 226 #ifdef CONFIG_X86_AMD_PLATFORM_DEVICE 227 { "AMD0010", APD_ADDR(cz_i2c_desc) }, 228 { "AMD0020", APD_ADDR(cz_uart_desc) }, 229 { "AMD0030", }, 230 { "AMD0040", APD_ADDR(fch_misc_desc)}, 231 { "AMDI0010", APD_ADDR(wt_i2c_desc) }, 232 { "AMDI0019", APD_ADDR(wt_i2c_desc) }, 233 { "AMDI0020", APD_ADDR(cz_uart_desc) }, 234 { "AMDI0022", APD_ADDR(cz_uart_desc) }, 235 { "HYGO0010", APD_ADDR(wt_i2c_desc) }, 236 #endif 237 #ifdef CONFIG_ARM64 238 { "APMC0D0F", APD_ADDR(xgene_i2c_desc) }, 239 { "BRCM900D", APD_ADDR(vulcan_spi_desc) }, 240 { "CAV900D", APD_ADDR(vulcan_spi_desc) }, 241 { "CAV9007", APD_ADDR(thunderx2_i2c_desc) }, 242 { "HISI02A1", APD_ADDR(hip07_i2c_desc) }, 243 { "HISI02A2", APD_ADDR(hip08_i2c_desc) }, 244 { "HISI02A3", APD_ADDR(hip08_lite_i2c_desc) }, 245 { "HISI0173", APD_ADDR(hip08_spi_desc) }, 246 { "NXP0001", APD_ADDR(nxp_i2c_desc) }, 247 #endif 248 { } 249 }; 250 251 static struct acpi_scan_handler apd_handler = { 252 .ids = acpi_apd_device_ids, 253 .attach = acpi_apd_create_device, 254 }; 255 256 void __init acpi_apd_init(void) 257 { 258 acpi_scan_add_handler(&apd_handler); 259 } 260