drivers/acpi/x86/utils.c - linux - Git at Google

 // 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 (!adev->pnp.unique_id ||
 			    strcmp(adev->pnp.unique_id, 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);

 int acpi_quirk_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;

 	*skip = false;

 	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;
 }
 EXPORT_SYMBOL_GPL(acpi_quirk_skip_serdev_enumeration);

 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);
 #endif

 /* 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);
 }
	// 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 (!adev->pnp.unique_id \|\|
	strcmp(adev->pnp.unique_id, 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);

	int acpi_quirk_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;

	*skip = false;

	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;
	}
	EXPORT_SYMBOL_GPL(acpi_quirk_skip_serdev_enumeration);

	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);
	#endif

	/* 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);
	}