1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * X86 ACPI Utility Functions 4 * 5 * Copyright (C) 2017 Hans de Goede <hdegoede@redhat.com> 6 * 7 * Based on various non upstream patches to support the CHT Whiskey Cove PMIC: 8 * Copyright (C) 2013-2015 Intel Corporation. All rights reserved. 9 */ 10 11 #define pr_fmt(fmt) "ACPI: " fmt 12 13 #include <linux/acpi.h> 14 #include <linux/dmi.h> 15 #include <linux/platform_device.h> 16 #include <asm/cpu_device_id.h> 17 #include <asm/intel-family.h> 18 #include "../internal.h" 19 20 /* 21 * Some ACPI devices are hidden (status == 0x0) in recent BIOS-es because 22 * some recent Windows drivers bind to one device but poke at multiple 23 * devices at the same time, so the others get hidden. 24 * 25 * Some BIOS-es (temporarily) hide specific APCI devices to work around Windows 26 * driver bugs. We use DMI matching to match known cases of this. 27 * 28 * Likewise sometimes some not-actually present devices are sometimes 29 * reported as present, which may cause issues. 30 * 31 * We work around this by using the below quirk list to override the status 32 * reported by the _STA method with a fixed value (ACPI_STA_DEFAULT or 0). 33 * Note this MUST only be done for devices where this is safe. 34 * 35 * This status overriding is limited to specific CPU (SoC) models both to 36 * avoid potentially causing trouble on other models and because some HIDs 37 * are re-used on different SoCs for completely different devices. 38 */ 39 struct override_status_id { 40 struct acpi_device_id hid[2]; 41 struct x86_cpu_id cpu_ids[2]; 42 struct dmi_system_id dmi_ids[2]; /* Optional */ 43 const char *uid; 44 const char *path; 45 unsigned long long status; 46 }; 47 48 #define ENTRY(status, hid, uid, path, cpu_vfm, dmi...) { \ 49 { { hid, }, {} }, \ 50 { X86_MATCH_VFM(cpu_vfm, NULL), {} }, \ 51 { { .matches = dmi }, {} }, \ 52 uid, \ 53 path, \ 54 status, \ 55 } 56 57 #define PRESENT_ENTRY_HID(hid, uid, cpu_vfm, dmi...) \ 58 ENTRY(ACPI_STA_DEFAULT, hid, uid, NULL, cpu_vfm, dmi) 59 60 #define NOT_PRESENT_ENTRY_HID(hid, uid, cpu_vfm, dmi...) \ 61 ENTRY(0, hid, uid, NULL, cpu_vfm, dmi) 62 63 #define PRESENT_ENTRY_PATH(path, cpu_vfm, dmi...) \ 64 ENTRY(ACPI_STA_DEFAULT, "", NULL, path, cpu_vfm, dmi) 65 66 #define NOT_PRESENT_ENTRY_PATH(path, cpu_vfm, dmi...) \ 67 ENTRY(0, "", NULL, path, cpu_vfm, dmi) 68 69 static const struct override_status_id override_status_ids[] = { 70 /* 71 * Bay / Cherry Trail PWM directly poked by GPU driver in win10, 72 * but Linux uses a separate PWM driver, harmless if not used. 73 */ 74 PRESENT_ENTRY_HID("80860F09", "1", INTEL_ATOM_SILVERMONT, {}), 75 PRESENT_ENTRY_HID("80862288", "1", INTEL_ATOM_AIRMONT, {}), 76 77 /* The Xiaomi Mi Pad 2 uses PWM2 for touchkeys backlight control */ 78 PRESENT_ENTRY_HID("80862289", "2", INTEL_ATOM_AIRMONT, { 79 DMI_MATCH(DMI_SYS_VENDOR, "Xiaomi Inc"), 80 DMI_MATCH(DMI_PRODUCT_NAME, "Mipad2"), 81 }), 82 83 /* 84 * The INT0002 device is necessary to clear wakeup interrupt sources 85 * on Cherry Trail devices, without it we get nobody cared IRQ msgs. 86 */ 87 PRESENT_ENTRY_HID("INT0002", "1", INTEL_ATOM_AIRMONT, {}), 88 /* 89 * On the Dell Venue 11 Pro 7130 and 7139, the DSDT hides 90 * the touchscreen ACPI device until a certain time 91 * after _SB.PCI0.GFX0.LCD.LCD1._ON gets called has passed 92 * *and* _STA has been called at least 3 times since. 93 */ 94 PRESENT_ENTRY_HID("SYNA7500", "1", INTEL_HASWELL_L, { 95 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 96 DMI_MATCH(DMI_PRODUCT_NAME, "Venue 11 Pro 7130"), 97 }), 98 PRESENT_ENTRY_HID("SYNA7500", "1", INTEL_HASWELL_L, { 99 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 100 DMI_MATCH(DMI_PRODUCT_NAME, "Venue 11 Pro 7139"), 101 }), 102 103 /* 104 * The Dell XPS 15 9550 has a SMO8110 accelerometer / 105 * HDD freefall sensor which is wrongly marked as not present. 106 */ 107 PRESENT_ENTRY_HID("SMO8810", "1", INTEL_SKYLAKE, { 108 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 109 DMI_MATCH(DMI_PRODUCT_NAME, "XPS 15 9550"), 110 }), 111 112 /* 113 * The GPD win BIOS dated 20170221 has disabled the accelerometer, the 114 * drivers sometimes cause crashes under Windows and this is how the 115 * manufacturer has solved this :| The DMI match may not seem unique, 116 * but it is. In the 67000+ DMI decode dumps from linux-hardware.org 117 * only 116 have board_vendor set to "AMI Corporation" and of those 116 118 * only the GPD win and pocket entries' board_name is "Default string". 119 * 120 * Unfortunately the GPD pocket also uses these strings and its BIOS 121 * was copy-pasted from the GPD win, so it has a disabled KIOX000A 122 * node which we should not enable, thus we also check the BIOS date. 123 */ 124 PRESENT_ENTRY_HID("KIOX000A", "1", INTEL_ATOM_AIRMONT, { 125 DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"), 126 DMI_MATCH(DMI_BOARD_NAME, "Default string"), 127 DMI_MATCH(DMI_PRODUCT_NAME, "Default string"), 128 DMI_MATCH(DMI_BIOS_DATE, "02/21/2017") 129 }), 130 PRESENT_ENTRY_HID("KIOX000A", "1", INTEL_ATOM_AIRMONT, { 131 DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"), 132 DMI_MATCH(DMI_BOARD_NAME, "Default string"), 133 DMI_MATCH(DMI_PRODUCT_NAME, "Default string"), 134 DMI_MATCH(DMI_BIOS_DATE, "03/20/2017") 135 }), 136 PRESENT_ENTRY_HID("KIOX000A", "1", INTEL_ATOM_AIRMONT, { 137 DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"), 138 DMI_MATCH(DMI_BOARD_NAME, "Default string"), 139 DMI_MATCH(DMI_PRODUCT_NAME, "Default string"), 140 DMI_MATCH(DMI_BIOS_DATE, "05/25/2017") 141 }), 142 143 /* 144 * The GPD win/pocket have a PCI wifi card, but its DSDT has the SDIO 145 * mmc controller enabled and that has a child-device which _PS3 146 * method sets a GPIO causing the PCI wifi card to turn off. 147 * See above remark about uniqueness of the DMI match. 148 */ 149 NOT_PRESENT_ENTRY_PATH("\\_SB_.PCI0.SDHB.BRC1", INTEL_ATOM_AIRMONT, { 150 DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"), 151 DMI_EXACT_MATCH(DMI_BOARD_NAME, "Default string"), 152 DMI_EXACT_MATCH(DMI_BOARD_SERIAL, "Default string"), 153 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Default string"), 154 }), 155 156 /* 157 * The LSM303D on the Lenovo Yoga Tablet 2 series is present 158 * as both ACCL0001 and MAGN0001. As we can only ever register an 159 * i2c client for one of them, ignore MAGN0001. 160 */ 161 NOT_PRESENT_ENTRY_HID("MAGN0001", "1", INTEL_ATOM_SILVERMONT, { 162 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 163 DMI_MATCH(DMI_PRODUCT_FAMILY, "YOGATablet2"), 164 }), 165 }; 166 167 bool acpi_device_override_status(struct acpi_device *adev, unsigned long long *status) 168 { 169 bool ret = false; 170 unsigned int i; 171 172 for (i = 0; i < ARRAY_SIZE(override_status_ids); i++) { 173 if (!x86_match_cpu(override_status_ids[i].cpu_ids)) 174 continue; 175 176 if (override_status_ids[i].dmi_ids[0].matches[0].slot && 177 !dmi_check_system(override_status_ids[i].dmi_ids)) 178 continue; 179 180 if (override_status_ids[i].path) { 181 struct acpi_buffer path = { ACPI_ALLOCATE_BUFFER, NULL }; 182 bool match; 183 184 if (acpi_get_name(adev->handle, ACPI_FULL_PATHNAME, &path)) 185 continue; 186 187 match = strcmp((char *)path.pointer, override_status_ids[i].path) == 0; 188 kfree(path.pointer); 189 190 if (!match) 191 continue; 192 } else { 193 if (acpi_match_device_ids(adev, override_status_ids[i].hid)) 194 continue; 195 196 if (!acpi_dev_uid_match(adev, override_status_ids[i].uid)) 197 continue; 198 } 199 200 *status = override_status_ids[i].status; 201 ret = true; 202 break; 203 } 204 205 return ret; 206 } 207 208 /* 209 * AMD systems from Renoir onwards *require* that the NVME controller 210 * is put into D3 over a Modern Standby / suspend-to-idle cycle. 211 * 212 * This is "typically" accomplished using the `StorageD3Enable` 213 * property in the _DSD that is checked via the `acpi_storage_d3` function 214 * but some OEM systems still don't have it in their BIOS. 215 * 216 * The Microsoft documentation for StorageD3Enable mentioned that Windows has 217 * a hardcoded allowlist for D3 support as well as a registry key to override 218 * the BIOS, which has been used for these cases. 219 * 220 * This allows quirking on Linux in a similar fashion. 221 * 222 * Cezanne systems shouldn't *normally* need this as the BIOS includes 223 * StorageD3Enable. But for two reasons we have added it. 224 * 1) The BIOS on a number of Dell systems have ambiguity 225 * between the same value used for _ADR on ACPI nodes GPP1.DEV0 and GPP1.NVME. 226 * GPP1.NVME is needed to get StorageD3Enable node set properly. 227 * https://bugzilla.kernel.org/show_bug.cgi?id=216440 228 * https://bugzilla.kernel.org/show_bug.cgi?id=216773 229 * https://bugzilla.kernel.org/show_bug.cgi?id=217003 230 * 2) On at least one HP system StorageD3Enable is missing on the second NVME 231 * disk in the system. 232 * 3) On at least one HP Rembrandt system StorageD3Enable is missing on the only 233 * NVME device. 234 */ 235 bool force_storage_d3(void) 236 { 237 if (!cpu_feature_enabled(X86_FEATURE_ZEN)) 238 return false; 239 return acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0; 240 } 241 242 /* 243 * x86 ACPI boards which ship with only Android as their factory image usually 244 * declare a whole bunch of bogus I2C devices in their ACPI tables and sometimes 245 * there are issues with serdev devices on these boards too, e.g. the resource 246 * points to the wrong serdev_controller. 247 * 248 * Instantiating I2C / serdev devs for these bogus devs causes various issues, 249 * e.g. GPIO/IRQ resource conflicts because sometimes drivers do bind to them. 250 * The Android x86 kernel fork shipped on these devices has some special code 251 * to remove the bogus I2C clients (and AFAICT serdevs are ignored completely). 252 * 253 * The acpi_quirk_skip_*_enumeration() functions below are used by the I2C or 254 * serdev code to skip instantiating any I2C or serdev devs on broken boards. 255 * 256 * In case of I2C an exception is made for HIDs on the i2c_acpi_known_good_ids 257 * list. These are known to always be correct (and in case of the audio-codecs 258 * the drivers heavily rely on the codec being enumerated through ACPI). 259 * 260 * Note these boards typically do actually have I2C and serdev devices, 261 * just different ones then the ones described in their DSDT. The devices 262 * which are actually present are manually instantiated by the 263 * drivers/platform/x86/x86-android-tablets.c kernel module. 264 */ 265 #define ACPI_QUIRK_SKIP_I2C_CLIENTS BIT(0) 266 #define ACPI_QUIRK_UART1_SKIP BIT(1) 267 #define ACPI_QUIRK_UART1_TTY_UART2_SKIP BIT(2) 268 #define ACPI_QUIRK_PNP_UART1_SKIP BIT(3) 269 #define ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY BIT(4) 270 #define ACPI_QUIRK_USE_ACPI_AC_AND_BATTERY BIT(5) 271 #define ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS BIT(6) 272 273 static const struct dmi_system_id acpi_quirk_skip_dmi_ids[] = { 274 /* 275 * 1. Devices with only the skip / don't-skip AC and battery quirks, 276 * sorted alphabetically. 277 */ 278 { 279 /* ECS EF20EA, AXP288 PMIC but uses separate fuel-gauge */ 280 .matches = { 281 DMI_MATCH(DMI_PRODUCT_NAME, "EF20EA"), 282 }, 283 .driver_data = (void *)ACPI_QUIRK_USE_ACPI_AC_AND_BATTERY 284 }, 285 { 286 /* Lenovo Ideapad Miix 320, AXP288 PMIC, separate fuel-gauge */ 287 .matches = { 288 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 289 DMI_MATCH(DMI_PRODUCT_NAME, "80XF"), 290 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo MIIX 320-10ICR"), 291 }, 292 .driver_data = (void *)ACPI_QUIRK_USE_ACPI_AC_AND_BATTERY 293 }, 294 295 /* 296 * 2. Devices which also have the skip i2c/serdev quirks and which 297 * need the x86-android-tablets module to properly work. 298 */ 299 #if IS_ENABLED(CONFIG_X86_ANDROID_TABLETS) 300 { 301 /* Acer Iconia One 7 B1-750 */ 302 .matches = { 303 DMI_MATCH(DMI_SYS_VENDOR, "Insyde"), 304 DMI_MATCH(DMI_PRODUCT_NAME, "VESPA2"), 305 }, 306 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS | 307 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY | 308 ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS), 309 }, 310 { 311 .matches = { 312 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 313 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "ME176C"), 314 }, 315 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS | 316 ACPI_QUIRK_UART1_TTY_UART2_SKIP | 317 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY | 318 ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS), 319 }, 320 { 321 /* Lenovo Yoga Book X90F/L */ 322 .matches = { 323 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Intel Corporation"), 324 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "CHERRYVIEW D1 PLATFORM"), 325 DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "YETI-11"), 326 }, 327 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS | 328 ACPI_QUIRK_UART1_SKIP | 329 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY | 330 ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS), 331 }, 332 { 333 .matches = { 334 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 335 DMI_MATCH(DMI_PRODUCT_NAME, "TF103C"), 336 }, 337 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS | 338 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY | 339 ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS), 340 }, 341 { 342 /* Lenovo Yoga Tablet 2 1050F/L */ 343 .matches = { 344 DMI_MATCH(DMI_SYS_VENDOR, "Intel Corp."), 345 DMI_MATCH(DMI_PRODUCT_NAME, "VALLEYVIEW C0 PLATFORM"), 346 DMI_MATCH(DMI_BOARD_NAME, "BYT-T FFD8"), 347 /* Partial match on beginning of BIOS version */ 348 DMI_MATCH(DMI_BIOS_VERSION, "BLADE_21"), 349 }, 350 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS | 351 ACPI_QUIRK_PNP_UART1_SKIP | 352 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY), 353 }, 354 { 355 /* Lenovo Yoga Tab 3 Pro X90F */ 356 .matches = { 357 DMI_MATCH(DMI_SYS_VENDOR, "Intel Corporation"), 358 DMI_MATCH(DMI_PRODUCT_VERSION, "Blade3-10A-001"), 359 }, 360 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS | 361 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY), 362 }, 363 { 364 /* Medion Lifetab S10346 */ 365 .matches = { 366 DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"), 367 DMI_MATCH(DMI_BOARD_NAME, "Aptio CRB"), 368 /* Way too generic, also match on BIOS data */ 369 DMI_MATCH(DMI_BIOS_DATE, "10/22/2015"), 370 }, 371 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS | 372 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY), 373 }, 374 { 375 /* Nextbook Ares 8 (BYT version)*/ 376 .matches = { 377 DMI_MATCH(DMI_SYS_VENDOR, "Insyde"), 378 DMI_MATCH(DMI_PRODUCT_NAME, "M890BAP"), 379 }, 380 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS | 381 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY | 382 ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS), 383 }, 384 { 385 /* Nextbook Ares 8A (CHT version)*/ 386 .matches = { 387 DMI_MATCH(DMI_SYS_VENDOR, "Insyde"), 388 DMI_MATCH(DMI_PRODUCT_NAME, "CherryTrail"), 389 DMI_MATCH(DMI_BIOS_VERSION, "M882"), 390 }, 391 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS | 392 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY), 393 }, 394 { 395 /* Whitelabel (sold as various brands) TM800A550L */ 396 .matches = { 397 DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"), 398 DMI_MATCH(DMI_BOARD_NAME, "Aptio CRB"), 399 /* Above strings are too generic, also match on BIOS version */ 400 DMI_MATCH(DMI_BIOS_VERSION, "ZY-8-BI-PX4S70VTR400-X423B-005-D"), 401 }, 402 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS | 403 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY), 404 }, 405 #endif 406 {} 407 }; 408 409 #if IS_ENABLED(CONFIG_X86_ANDROID_TABLETS) 410 static const struct acpi_device_id i2c_acpi_known_good_ids[] = { 411 { "10EC5640", 0 }, /* RealTek ALC5640 audio codec */ 412 { "10EC5651", 0 }, /* RealTek ALC5651 audio codec */ 413 { "INT33F4", 0 }, /* X-Powers AXP288 PMIC */ 414 { "INT33FD", 0 }, /* Intel Crystal Cove PMIC */ 415 { "INT34D3", 0 }, /* Intel Whiskey Cove PMIC */ 416 { "NPCE69A", 0 }, /* Asus Transformer keyboard dock */ 417 {} 418 }; 419 420 bool acpi_quirk_skip_i2c_client_enumeration(struct acpi_device *adev) 421 { 422 const struct dmi_system_id *dmi_id; 423 long quirks; 424 425 dmi_id = dmi_first_match(acpi_quirk_skip_dmi_ids); 426 if (!dmi_id) 427 return false; 428 429 quirks = (unsigned long)dmi_id->driver_data; 430 if (!(quirks & ACPI_QUIRK_SKIP_I2C_CLIENTS)) 431 return false; 432 433 return acpi_match_device_ids(adev, i2c_acpi_known_good_ids); 434 } 435 EXPORT_SYMBOL_GPL(acpi_quirk_skip_i2c_client_enumeration); 436 437 static int acpi_dmi_skip_serdev_enumeration(struct device *controller_parent, bool *skip) 438 { 439 struct acpi_device *adev = ACPI_COMPANION(controller_parent); 440 const struct dmi_system_id *dmi_id; 441 long quirks = 0; 442 u64 uid; 443 int ret; 444 445 ret = acpi_dev_uid_to_integer(adev, &uid); 446 if (ret) 447 return 0; 448 449 dmi_id = dmi_first_match(acpi_quirk_skip_dmi_ids); 450 if (dmi_id) 451 quirks = (unsigned long)dmi_id->driver_data; 452 453 if (!dev_is_platform(controller_parent)) { 454 /* PNP enumerated UARTs */ 455 if ((quirks & ACPI_QUIRK_PNP_UART1_SKIP) && uid == 1) 456 *skip = true; 457 458 return 0; 459 } 460 461 if ((quirks & ACPI_QUIRK_UART1_SKIP) && uid == 1) 462 *skip = true; 463 464 if (quirks & ACPI_QUIRK_UART1_TTY_UART2_SKIP) { 465 if (uid == 1) 466 return -ENODEV; /* Create tty cdev instead of serdev */ 467 468 if (uid == 2) 469 *skip = true; 470 } 471 472 return 0; 473 } 474 475 bool acpi_quirk_skip_gpio_event_handlers(void) 476 { 477 const struct dmi_system_id *dmi_id; 478 long quirks; 479 480 dmi_id = dmi_first_match(acpi_quirk_skip_dmi_ids); 481 if (!dmi_id) 482 return false; 483 484 quirks = (unsigned long)dmi_id->driver_data; 485 return (quirks & ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS); 486 } 487 EXPORT_SYMBOL_GPL(acpi_quirk_skip_gpio_event_handlers); 488 #else 489 static int acpi_dmi_skip_serdev_enumeration(struct device *controller_parent, bool *skip) 490 { 491 return 0; 492 } 493 #endif 494 495 int acpi_quirk_skip_serdev_enumeration(struct device *controller_parent, bool *skip) 496 { 497 struct acpi_device *adev = ACPI_COMPANION(controller_parent); 498 499 *skip = false; 500 501 /* 502 * The DELL0501 ACPI HID represents an UART (CID is set to PNP0501) with 503 * a backlight-controller attached. There is no separate ACPI device with 504 * an UartSerialBusV2() resource to model the backlight-controller. 505 * Set skip to true so that the tty core creates a serdev ctrl device. 506 * The backlight driver will manually create the serdev client device. 507 */ 508 if (acpi_dev_hid_match(adev, "DELL0501")) { 509 *skip = true; 510 /* 511 * Create a platform dev for dell-uart-backlight to bind to. 512 * This is a static device, so no need to store the result. 513 */ 514 platform_device_register_simple("dell-uart-backlight", PLATFORM_DEVID_NONE, 515 NULL, 0); 516 return 0; 517 } 518 519 return acpi_dmi_skip_serdev_enumeration(controller_parent, skip); 520 } 521 EXPORT_SYMBOL_GPL(acpi_quirk_skip_serdev_enumeration); 522 523 /* Lists of PMIC ACPI HIDs with an (often better) native charger driver */ 524 static const struct { 525 const char *hid; 526 int hrv; 527 } acpi_skip_ac_and_battery_pmic_ids[] = { 528 { "INT33F4", -1 }, /* X-Powers AXP288 PMIC */ 529 { "INT34D3", 3 }, /* Intel Cherrytrail Whiskey Cove PMIC */ 530 }; 531 532 bool acpi_quirk_skip_acpi_ac_and_battery(void) 533 { 534 const struct dmi_system_id *dmi_id; 535 long quirks = 0; 536 int i; 537 538 dmi_id = dmi_first_match(acpi_quirk_skip_dmi_ids); 539 if (dmi_id) 540 quirks = (unsigned long)dmi_id->driver_data; 541 542 if (quirks & ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY) 543 return true; 544 545 if (quirks & ACPI_QUIRK_USE_ACPI_AC_AND_BATTERY) 546 return false; 547 548 for (i = 0; i < ARRAY_SIZE(acpi_skip_ac_and_battery_pmic_ids); i++) { 549 if (acpi_dev_present(acpi_skip_ac_and_battery_pmic_ids[i].hid, "1", 550 acpi_skip_ac_and_battery_pmic_ids[i].hrv)) { 551 pr_info_once("found native %s PMIC, skipping ACPI AC and battery devices\n", 552 acpi_skip_ac_and_battery_pmic_ids[i].hid); 553 return true; 554 } 555 } 556 557 return false; 558 } 559 EXPORT_SYMBOL_GPL(acpi_quirk_skip_acpi_ac_and_battery); 560 561 /* This section provides a workaround for a specific x86 system 562 * which requires disabling of mwait to work correctly. 563 */ 564 static int __init acpi_proc_quirk_set_no_mwait(const struct dmi_system_id *id) 565 { 566 pr_notice("%s detected - disabling mwait for CPU C-states\n", 567 id->ident); 568 boot_option_idle_override = IDLE_NOMWAIT; 569 return 0; 570 } 571 572 static const struct dmi_system_id acpi_proc_quirk_mwait_dmi_table[] __initconst = { 573 { 574 .callback = acpi_proc_quirk_set_no_mwait, 575 .ident = "Extensa 5220", 576 .matches = { 577 DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"), 578 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 579 DMI_MATCH(DMI_PRODUCT_VERSION, "0100"), 580 DMI_MATCH(DMI_BOARD_NAME, "Columbia"), 581 }, 582 .driver_data = NULL, 583 }, 584 {} 585 }; 586 587 void __init acpi_proc_quirk_mwait_check(void) 588 { 589 /* 590 * Check whether the system is DMI table. If yes, OSPM 591 * should not use mwait for CPU-states. 592 */ 593 dmi_check_system(acpi_proc_quirk_mwait_dmi_table); 594 } 595