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// SPDX-License-Identifier: GPL-2.0-only
/*
* X86 ACPI Utility Functions
*
* Copyright (C) 2017 Hans de Goede <hdegoede@redhat.com>
*
* Based on various non upstream patches to support the CHT Whiskey Cove PMIC:
* Copyright (C) 2013-2015 Intel Corporation. All rights reserved.
*/
#define pr_fmt(fmt) "ACPI: " fmt
#include <linux/acpi.h>
#include <linux/dmi.h>
#include <linux/platform_device.h>
#include <asm/cpu_device_id.h>
#include <asm/intel-family.h>
#include "../internal.h"
/*
* Some ACPI devices are hidden (status == 0x0) in recent BIOS-es because
* some recent Windows drivers bind to one device but poke at multiple
* devices at the same time, so the others get hidden.
*
* Some BIOS-es (temporarily) hide specific APCI devices to work around Windows
* driver bugs. We use DMI matching to match known cases of this.
*
* Likewise sometimes some not-actually present devices are sometimes
* reported as present, which may cause issues.
*
* We work around this by using the below quirk list to override the status
* reported by the _STA method with a fixed value (ACPI_STA_DEFAULT or 0).
* Note this MUST only be done for devices where this is safe.
*
* This status overriding is limited to specific CPU (SoC) models both to
* avoid potentially causing trouble on other models and because some HIDs
* are re-used on different SoCs for completely different devices.
*/
struct override_status_id {
struct acpi_device_id hid[2];
struct x86_cpu_id cpu_ids[2];
struct dmi_system_id dmi_ids[2]; /* Optional */
const char *uid;
const char *path;
unsigned long long status;
};
#define ENTRY(status, hid, uid, path, cpu_model, dmi...) { \
{ { hid, }, {} }, \
{ X86_MATCH_INTEL_FAM6_MODEL(cpu_model, NULL), {} }, \
{ { .matches = dmi }, {} }, \
uid, \
path, \
status, \
}
#define PRESENT_ENTRY_HID(hid, uid, cpu_model, dmi...) \
ENTRY(ACPI_STA_DEFAULT, hid, uid, NULL, cpu_model, dmi)
#define NOT_PRESENT_ENTRY_HID(hid, uid, cpu_model, dmi...) \
ENTRY(0, hid, uid, NULL, cpu_model, dmi)
#define PRESENT_ENTRY_PATH(path, cpu_model, dmi...) \
ENTRY(ACPI_STA_DEFAULT, "", NULL, path, cpu_model, dmi)
#define NOT_PRESENT_ENTRY_PATH(path, cpu_model, dmi...) \
ENTRY(0, "", NULL, path, cpu_model, dmi)
static const struct override_status_id override_status_ids[] = {
/*
* Bay / Cherry Trail PWM directly poked by GPU driver in win10,
* but Linux uses a separate PWM driver, harmless if not used.
*/
PRESENT_ENTRY_HID("80860F09", "1", ATOM_SILVERMONT, {}),
PRESENT_ENTRY_HID("80862288", "1", ATOM_AIRMONT, {}),
/* The Xiaomi Mi Pad 2 uses PWM2 for touchkeys backlight control */
PRESENT_ENTRY_HID("80862289", "2", ATOM_AIRMONT, {
DMI_MATCH(DMI_SYS_VENDOR, "Xiaomi Inc"),
DMI_MATCH(DMI_PRODUCT_NAME, "Mipad2"),
}),
/*
* The INT0002 device is necessary to clear wakeup interrupt sources
* on Cherry Trail devices, without it we get nobody cared IRQ msgs.
*/
PRESENT_ENTRY_HID("INT0002", "1", ATOM_AIRMONT, {}),
/*
* On the Dell Venue 11 Pro 7130 and 7139, the DSDT hides
* the touchscreen ACPI device until a certain time
* after _SB.PCI0.GFX0.LCD.LCD1._ON gets called has passed
* *and* _STA has been called at least 3 times since.
*/
PRESENT_ENTRY_HID("SYNA7500", "1", HASWELL_L, {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "Venue 11 Pro 7130"),
}),
PRESENT_ENTRY_HID("SYNA7500", "1", HASWELL_L, {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "Venue 11 Pro 7139"),
}),
/*
* The GPD win BIOS dated 20170221 has disabled the accelerometer, the
* drivers sometimes cause crashes under Windows and this is how the
* manufacturer has solved this :| The DMI match may not seem unique,
* but it is. In the 67000+ DMI decode dumps from linux-hardware.org
* only 116 have board_vendor set to "AMI Corporation" and of those 116
* only the GPD win and pocket entries' board_name is "Default string".
*
* Unfortunately the GPD pocket also uses these strings and its BIOS
* was copy-pasted from the GPD win, so it has a disabled KIOX000A
* node which we should not enable, thus we also check the BIOS date.
*/
PRESENT_ENTRY_HID("KIOX000A", "1", ATOM_AIRMONT, {
DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
DMI_MATCH(DMI_BOARD_NAME, "Default string"),
DMI_MATCH(DMI_PRODUCT_NAME, "Default string"),
DMI_MATCH(DMI_BIOS_DATE, "02/21/2017")
}),
PRESENT_ENTRY_HID("KIOX000A", "1", ATOM_AIRMONT, {
DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
DMI_MATCH(DMI_BOARD_NAME, "Default string"),
DMI_MATCH(DMI_PRODUCT_NAME, "Default string"),
DMI_MATCH(DMI_BIOS_DATE, "03/20/2017")
}),
PRESENT_ENTRY_HID("KIOX000A", "1", ATOM_AIRMONT, {
DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
DMI_MATCH(DMI_BOARD_NAME, "Default string"),
DMI_MATCH(DMI_PRODUCT_NAME, "Default string"),
DMI_MATCH(DMI_BIOS_DATE, "05/25/2017")
}),
/*
* The GPD win/pocket have a PCI wifi card, but its DSDT has the SDIO
* mmc controller enabled and that has a child-device which _PS3
* method sets a GPIO causing the PCI wifi card to turn off.
* See above remark about uniqueness of the DMI match.
*/
NOT_PRESENT_ENTRY_PATH("\\_SB_.PCI0.SDHB.BRC1", ATOM_AIRMONT, {
DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
DMI_EXACT_MATCH(DMI_BOARD_NAME, "Default string"),
DMI_EXACT_MATCH(DMI_BOARD_SERIAL, "Default string"),
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Default string"),
}),
/*
* The LSM303D on the Lenovo Yoga Tablet 2 series is present
* as both ACCL0001 and MAGN0001. As we can only ever register an
* i2c client for one of them, ignore MAGN0001.
*/
NOT_PRESENT_ENTRY_HID("MAGN0001", "1", ATOM_SILVERMONT, {
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
DMI_MATCH(DMI_PRODUCT_FAMILY, "YOGATablet2"),
}),
};
bool acpi_device_override_status(struct acpi_device *adev, unsigned long long *status)
{
bool ret = false;
unsigned int i;
for (i = 0; i < ARRAY_SIZE(override_status_ids); i++) {
if (!x86_match_cpu(override_status_ids[i].cpu_ids))
continue;
if (override_status_ids[i].dmi_ids[0].matches[0].slot &&
!dmi_check_system(override_status_ids[i].dmi_ids))
continue;
if (override_status_ids[i].path) {
struct acpi_buffer path = { ACPI_ALLOCATE_BUFFER, NULL };
bool match;
if (acpi_get_name(adev->handle, ACPI_FULL_PATHNAME, &path))
continue;
match = strcmp((char *)path.pointer, override_status_ids[i].path) == 0;
kfree(path.pointer);
if (!match)
continue;
} else {
if (acpi_match_device_ids(adev, override_status_ids[i].hid))
continue;
if (!acpi_dev_uid_match(adev, override_status_ids[i].uid))
continue;
}
*status = override_status_ids[i].status;
ret = true;
break;
}
return ret;
}
/*
* AMD systems from Renoir and Lucienne *require* that the NVME controller
* is put into D3 over a Modern Standby / suspend-to-idle cycle.
*
* This is "typically" accomplished using the `StorageD3Enable`
* property in the _DSD that is checked via the `acpi_storage_d3` function
* but this property was introduced after many of these systems launched
* and most OEM systems don't have it in their BIOS.
*
* The Microsoft documentation for StorageD3Enable mentioned that Windows has
* a hardcoded allowlist for D3 support, which was used for these platforms.
*
* This allows quirking on Linux in a similar fashion.
*
* Cezanne systems shouldn't *normally* need this as the BIOS includes
* StorageD3Enable. But for two reasons we have added it.
* 1) The BIOS on a number of Dell systems have ambiguity
* between the same value used for _ADR on ACPI nodes GPP1.DEV0 and GPP1.NVME.
* GPP1.NVME is needed to get StorageD3Enable node set properly.
* https://bugzilla.kernel.org/show_bug.cgi?id=216440
* https://bugzilla.kernel.org/show_bug.cgi?id=216773
* https://bugzilla.kernel.org/show_bug.cgi?id=217003
* 2) On at least one HP system StorageD3Enable is missing on the second NVME
disk in the system.
*/
static const struct x86_cpu_id storage_d3_cpu_ids[] = {
X86_MATCH_VENDOR_FAM_MODEL(AMD, 23, 24, NULL), /* Picasso */
X86_MATCH_VENDOR_FAM_MODEL(AMD, 23, 96, NULL), /* Renoir */
X86_MATCH_VENDOR_FAM_MODEL(AMD, 23, 104, NULL), /* Lucienne */
X86_MATCH_VENDOR_FAM_MODEL(AMD, 25, 80, NULL), /* Cezanne */
{}
};
bool force_storage_d3(void)
{
return x86_match_cpu(storage_d3_cpu_ids);
}
/*
* x86 ACPI boards which ship with only Android as their factory image usually
* declare a whole bunch of bogus I2C devices in their ACPI tables and sometimes
* there are issues with serdev devices on these boards too, e.g. the resource
* points to the wrong serdev_controller.
*
* Instantiating I2C / serdev devs for these bogus devs causes various issues,
* e.g. GPIO/IRQ resource conflicts because sometimes drivers do bind to them.
* The Android x86 kernel fork shipped on these devices has some special code
* to remove the bogus I2C clients (and AFAICT serdevs are ignored completely).
*
* The acpi_quirk_skip_*_enumeration() functions below are used by the I2C or
* serdev code to skip instantiating any I2C or serdev devs on broken boards.
*
* In case of I2C an exception is made for HIDs on the i2c_acpi_known_good_ids
* list. These are known to always be correct (and in case of the audio-codecs
* the drivers heavily rely on the codec being enumerated through ACPI).
*
* Note these boards typically do actually have I2C and serdev devices,
* just different ones then the ones described in their DSDT. The devices
* which are actually present are manually instantiated by the
* drivers/platform/x86/x86-android-tablets.c kernel module.
*/
#define ACPI_QUIRK_SKIP_I2C_CLIENTS BIT(0)
#define ACPI_QUIRK_UART1_SKIP BIT(1)
#define ACPI_QUIRK_UART1_TTY_UART2_SKIP BIT(2)
#define ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY BIT(3)
#define ACPI_QUIRK_USE_ACPI_AC_AND_BATTERY BIT(4)
#define ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS BIT(5)
static const struct dmi_system_id acpi_quirk_skip_dmi_ids[] = {
/*
* 1. Devices with only the skip / don't-skip AC and battery quirks,
* sorted alphabetically.
*/
{
/* ECS EF20EA, AXP288 PMIC but uses separate fuel-gauge */
.matches = {
DMI_MATCH(DMI_PRODUCT_NAME, "EF20EA"),
},
.driver_data = (void *)ACPI_QUIRK_USE_ACPI_AC_AND_BATTERY
},
{
/* Lenovo Ideapad Miix 320, AXP288 PMIC, separate fuel-gauge */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
DMI_MATCH(DMI_PRODUCT_NAME, "80XF"),
DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo MIIX 320-10ICR"),
},
.driver_data = (void *)ACPI_QUIRK_USE_ACPI_AC_AND_BATTERY
},
/*
* 2. Devices which also have the skip i2c/serdev quirks and which
* need the x86-android-tablets module to properly work.
*/
#if IS_ENABLED(CONFIG_X86_ANDROID_TABLETS)
{
/* Acer Iconia One 7 B1-750 */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Insyde"),
DMI_MATCH(DMI_PRODUCT_NAME, "VESPA2"),
},
.driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS |
ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY |
ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS),
},
{
.matches = {
DMI_EXACT_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "ME176C"),
},
.driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS |
ACPI_QUIRK_UART1_TTY_UART2_SKIP |
ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY |
ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS),
},
{
/* Lenovo Yoga Book X90F/L */
.matches = {
DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Intel Corporation"),
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "CHERRYVIEW D1 PLATFORM"),
DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "YETI-11"),
},
.driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS |
ACPI_QUIRK_UART1_SKIP |
ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY |
ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS),
},
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
DMI_MATCH(DMI_PRODUCT_NAME, "TF103C"),
},
.driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS |
ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY |
ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS),
},
{
/* Lenovo Yoga Tablet 2 1050F/L */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Intel Corp."),
DMI_MATCH(DMI_PRODUCT_NAME, "VALLEYVIEW C0 PLATFORM"),
DMI_MATCH(DMI_BOARD_NAME, "BYT-T FFD8"),
/* Partial match on beginning of BIOS version */
DMI_MATCH(DMI_BIOS_VERSION, "BLADE_21"),
},
.driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS |
ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY),
},
{
/* Lenovo Yoga Tab 3 Pro X90F */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Intel Corporation"),
DMI_MATCH(DMI_PRODUCT_NAME, "CHERRYVIEW D1 PLATFORM"),
DMI_MATCH(DMI_PRODUCT_VERSION, "Blade3-10A-001"),
},
.driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS |
ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY),
},
{
/* Medion Lifetab S10346 */
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
DMI_MATCH(DMI_BOARD_NAME, "Aptio CRB"),
/* Way too generic, also match on BIOS data */
DMI_MATCH(DMI_BIOS_DATE, "10/22/2015"),
},
.driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS |
ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY),
},
{
/* Nextbook Ares 8 (BYT version)*/
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Insyde"),
DMI_MATCH(DMI_PRODUCT_NAME, "M890BAP"),
},
.driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS |
ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY |
ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS),
},
{
/* Nextbook Ares 8A (CHT version)*/
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Insyde"),
DMI_MATCH(DMI_PRODUCT_NAME, "CherryTrail"),
DMI_MATCH(DMI_BIOS_VERSION, "M882"),
},
.driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS |
ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY),
},
{
/* Whitelabel (sold as various brands) TM800A550L */
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
DMI_MATCH(DMI_BOARD_NAME, "Aptio CRB"),
/* Above strings are too generic, also match on BIOS version */
DMI_MATCH(DMI_BIOS_VERSION, "ZY-8-BI-PX4S70VTR400-X423B-005-D"),
},
.driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS |
ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY),
},
#endif
{}
};
#if IS_ENABLED(CONFIG_X86_ANDROID_TABLETS)
static const struct acpi_device_id i2c_acpi_known_good_ids[] = {
{ "10EC5640", 0 }, /* RealTek ALC5640 audio codec */
{ "10EC5651", 0 }, /* RealTek ALC5651 audio codec */
{ "INT33F4", 0 }, /* X-Powers AXP288 PMIC */
{ "INT33FD", 0 }, /* Intel Crystal Cove PMIC */
{ "INT34D3", 0 }, /* Intel Whiskey Cove PMIC */
{ "NPCE69A", 0 }, /* Asus Transformer keyboard dock */
{}
};
bool acpi_quirk_skip_i2c_client_enumeration(struct acpi_device *adev)
{
const struct dmi_system_id *dmi_id;
long quirks;
dmi_id = dmi_first_match(acpi_quirk_skip_dmi_ids);
if (!dmi_id)
return false;
quirks = (unsigned long)dmi_id->driver_data;
if (!(quirks & ACPI_QUIRK_SKIP_I2C_CLIENTS))
return false;
return acpi_match_device_ids(adev, i2c_acpi_known_good_ids);
}
EXPORT_SYMBOL_GPL(acpi_quirk_skip_i2c_client_enumeration);
static int acpi_dmi_skip_serdev_enumeration(struct device *controller_parent, bool *skip)
{
struct acpi_device *adev = ACPI_COMPANION(controller_parent);
const struct dmi_system_id *dmi_id;
long quirks = 0;
u64 uid;
int ret;
ret = acpi_dev_uid_to_integer(adev, &uid);
if (ret)
return 0;
/* to not match on PNP enumerated debug UARTs */
if (!dev_is_platform(controller_parent))
return 0;
dmi_id = dmi_first_match(acpi_quirk_skip_dmi_ids);
if (dmi_id)
quirks = (unsigned long)dmi_id->driver_data;
if ((quirks & ACPI_QUIRK_UART1_SKIP) && uid == 1)
*skip = true;
if (quirks & ACPI_QUIRK_UART1_TTY_UART2_SKIP) {
if (uid == 1)
return -ENODEV; /* Create tty cdev instead of serdev */
if (uid == 2)
*skip = true;
}
return 0;
}
bool acpi_quirk_skip_gpio_event_handlers(void)
{
const struct dmi_system_id *dmi_id;
long quirks;
dmi_id = dmi_first_match(acpi_quirk_skip_dmi_ids);
if (!dmi_id)
return false;
quirks = (unsigned long)dmi_id->driver_data;
return (quirks & ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS);
}
EXPORT_SYMBOL_GPL(acpi_quirk_skip_gpio_event_handlers);
#else
static int acpi_dmi_skip_serdev_enumeration(struct device *controller_parent, bool *skip)
{
return 0;
}
#endif
int acpi_quirk_skip_serdev_enumeration(struct device *controller_parent, bool *skip)
{
struct acpi_device *adev = ACPI_COMPANION(controller_parent);
*skip = false;
/*
* The DELL0501 ACPI HID represents an UART (CID is set to PNP0501) with
* a backlight-controller attached. There is no separate ACPI device with
* an UartSerialBusV2() resource to model the backlight-controller.
* Set skip to true so that the tty core creates a serdev ctrl device.
* The backlight driver will manually create the serdev client device.
*/
if (acpi_dev_hid_match(adev, "DELL0501")) {
*skip = true;
/*
* Create a platform dev for dell-uart-backlight to bind to.
* This is a static device, so no need to store the result.
*/
platform_device_register_simple("dell-uart-backlight", PLATFORM_DEVID_NONE,
NULL, 0);
return 0;
}
return acpi_dmi_skip_serdev_enumeration(controller_parent, skip);
}
EXPORT_SYMBOL_GPL(acpi_quirk_skip_serdev_enumeration);
/* Lists of PMIC ACPI HIDs with an (often better) native charger driver */
static const struct {
const char *hid;
int hrv;
} acpi_skip_ac_and_battery_pmic_ids[] = {
{ "INT33F4", -1 }, /* X-Powers AXP288 PMIC */
{ "INT34D3", 3 }, /* Intel Cherrytrail Whiskey Cove PMIC */
};
bool acpi_quirk_skip_acpi_ac_and_battery(void)
{
const struct dmi_system_id *dmi_id;
long quirks = 0;
int i;
dmi_id = dmi_first_match(acpi_quirk_skip_dmi_ids);
if (dmi_id)
quirks = (unsigned long)dmi_id->driver_data;
if (quirks & ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY)
return true;
if (quirks & ACPI_QUIRK_USE_ACPI_AC_AND_BATTERY)
return false;
for (i = 0; i < ARRAY_SIZE(acpi_skip_ac_and_battery_pmic_ids); i++) {
if (acpi_dev_present(acpi_skip_ac_and_battery_pmic_ids[i].hid, "1",
acpi_skip_ac_and_battery_pmic_ids[i].hrv)) {
pr_info_once("found native %s PMIC, skipping ACPI AC and battery devices\n",
acpi_skip_ac_and_battery_pmic_ids[i].hid);
return true;
}
}
return false;
}
EXPORT_SYMBOL_GPL(acpi_quirk_skip_acpi_ac_and_battery);
/* This section provides a workaround for a specific x86 system
* which requires disabling of mwait to work correctly.
*/
static int __init acpi_proc_quirk_set_no_mwait(const struct dmi_system_id *id)
{
pr_notice("%s detected - disabling mwait for CPU C-states\n",
id->ident);
boot_option_idle_override = IDLE_NOMWAIT;
return 0;
}
static const struct dmi_system_id acpi_proc_quirk_mwait_dmi_table[] __initconst = {
{
.callback = acpi_proc_quirk_set_no_mwait,
.ident = "Extensa 5220",
.matches = {
DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
DMI_MATCH(DMI_PRODUCT_VERSION, "0100"),
DMI_MATCH(DMI_BOARD_NAME, "Columbia"),
},
.driver_data = NULL,
},
{}
};
void __init acpi_proc_quirk_mwait_check(void)
{
/*
* Check whether the system is DMI table. If yes, OSPM
* should not use mwait for CPU-states.
*/
dmi_check_system(acpi_proc_quirk_mwait_dmi_table);
}