1 // SPDX-License-Identifier: GPL-2.0
3 * ACPI helpers for GPIO API
5 * Copyright (C) 2012, Intel Corporation
10 #include <linux/dmi.h>
11 #include <linux/errno.h>
12 #include <linux/gpio/consumer.h>
13 #include <linux/gpio/driver.h>
14 #include <linux/gpio/machine.h>
15 #include <linux/export.h>
16 #include <linux/acpi.h>
17 #include <linux/interrupt.h>
18 #include <linux/mutex.h>
19 #include <linux/pinctrl/pinctrl.h>
22 #include "gpiolib-acpi.h"
24 static int run_edge_events_on_boot = -1;
25 module_param(run_edge_events_on_boot, int, 0444);
26 MODULE_PARM_DESC(run_edge_events_on_boot,
27 "Run edge _AEI event-handlers at boot: 0=no, 1=yes, -1=auto");
29 static char *ignore_wake;
30 module_param(ignore_wake, charp, 0444);
31 MODULE_PARM_DESC(ignore_wake,
32 "controller@pin combos on which to ignore the ACPI wake flag "
33 "ignore_wake=controller@pin[,controller@pin[,...]]");
35 static char *ignore_interrupt;
36 module_param(ignore_interrupt, charp, 0444);
37 MODULE_PARM_DESC(ignore_interrupt,
38 "controller@pin combos on which to ignore interrupt "
39 "ignore_interrupt=controller@pin[,controller@pin[,...]]");
41 struct acpi_gpiolib_dmi_quirk {
42 bool no_edge_events_on_boot;
44 char *ignore_interrupt;
48 * struct acpi_gpio_event - ACPI GPIO event handler data
50 * @node: list-entry of the events list of the struct acpi_gpio_chip
51 * @handle: handle of ACPI method to execute when the IRQ triggers
52 * @handler: handler function to pass to request_irq() when requesting the IRQ
53 * @pin: GPIO pin number on the struct gpio_chip
54 * @irq: Linux IRQ number for the event, for request_irq() / free_irq()
55 * @irqflags: flags to pass to request_irq() when requesting the IRQ
56 * @irq_is_wake: If the ACPI flags indicate the IRQ is a wakeup source
57 * @irq_requested:True if request_irq() has been done
58 * @desc: struct gpio_desc for the GPIO pin for this event
60 struct acpi_gpio_event {
61 struct list_head node;
63 irq_handler_t handler;
66 unsigned long irqflags;
69 struct gpio_desc *desc;
72 struct acpi_gpio_connection {
73 struct list_head node;
75 struct gpio_desc *desc;
78 struct acpi_gpio_chip {
80 * ACPICA requires that the first field of the context parameter
81 * passed to acpi_install_address_space_handler() is large enough
82 * to hold struct acpi_connection_info.
84 struct acpi_connection_info conn_info;
85 struct list_head conns;
86 struct mutex conn_lock;
87 struct gpio_chip *chip;
88 struct list_head events;
89 struct list_head deferred_req_irqs_list_entry;
93 * struct acpi_gpio_info - ACPI GPIO specific information
94 * @adev: reference to ACPI device which consumes GPIO resource
95 * @flags: GPIO initialization flags
96 * @gpioint: if %true this GPIO is of type GpioInt otherwise type is GpioIo
97 * @pin_config: pin bias as provided by ACPI
98 * @polarity: interrupt polarity as provided by ACPI
99 * @triggering: triggering type as provided by ACPI
100 * @wake_capable: wake capability as provided by ACPI
101 * @debounce: debounce timeout as provided by ACPI
102 * @quirks: Linux specific quirks as provided by struct acpi_gpio_mapping
104 struct acpi_gpio_info {
105 struct acpi_device *adev;
106 enum gpiod_flags flags;
112 unsigned int debounce;
117 * For GPIO chips which call acpi_gpiochip_request_interrupts() before late_init
118 * (so builtin drivers) we register the ACPI GpioInt IRQ handlers from a
119 * late_initcall_sync() handler, so that other builtin drivers can register their
120 * OpRegions before the event handlers can run. This list contains GPIO chips
121 * for which the acpi_gpiochip_request_irqs() call has been deferred.
123 static DEFINE_MUTEX(acpi_gpio_deferred_req_irqs_lock);
124 static LIST_HEAD(acpi_gpio_deferred_req_irqs_list);
125 static bool acpi_gpio_deferred_req_irqs_done;
127 static int acpi_gpiochip_find(struct gpio_chip *gc, void *data)
129 return gc->parent && device_match_acpi_handle(gc->parent, data);
133 * acpi_get_gpiod() - Translate ACPI GPIO pin to GPIO descriptor usable with GPIO API
134 * @path: ACPI GPIO controller full path name, (e.g. "\\_SB.GPO1")
135 * @pin: ACPI GPIO pin number (0-based, controller-relative)
137 * Return: GPIO descriptor to use with Linux generic GPIO API, or ERR_PTR
138 * error value. Specifically returns %-EPROBE_DEFER if the referenced GPIO
139 * controller does not have GPIO chip registered at the moment. This is to
140 * support probe deferral.
142 static struct gpio_desc *acpi_get_gpiod(char *path, unsigned int pin)
144 struct gpio_chip *chip;
148 status = acpi_get_handle(NULL, path, &handle);
149 if (ACPI_FAILURE(status))
150 return ERR_PTR(-ENODEV);
152 chip = gpiochip_find(handle, acpi_gpiochip_find);
154 return ERR_PTR(-EPROBE_DEFER);
156 return gpiochip_get_desc(chip, pin);
160 * acpi_get_and_request_gpiod - Translate ACPI GPIO pin to GPIO descriptor and
161 * hold a refcount to the GPIO device.
162 * @path: ACPI GPIO controller full path name, (e.g. "\\_SB.GPO1")
163 * @pin: ACPI GPIO pin number (0-based, controller-relative)
164 * @label: Label to pass to gpiod_request()
166 * This function is a simple pass-through to acpi_get_gpiod(), except that
167 * as it is intended for use outside of the GPIO layer (in a similar fashion to
168 * gpiod_get_index() for example) it also holds a reference to the GPIO device.
170 struct gpio_desc *acpi_get_and_request_gpiod(char *path, unsigned int pin, char *label)
172 struct gpio_desc *gpio;
175 gpio = acpi_get_gpiod(path, pin);
179 ret = gpiod_request(gpio, label);
185 EXPORT_SYMBOL_GPL(acpi_get_and_request_gpiod);
187 static irqreturn_t acpi_gpio_irq_handler(int irq, void *data)
189 struct acpi_gpio_event *event = data;
191 acpi_evaluate_object(event->handle, NULL, NULL, NULL);
196 static irqreturn_t acpi_gpio_irq_handler_evt(int irq, void *data)
198 struct acpi_gpio_event *event = data;
200 acpi_execute_simple_method(event->handle, NULL, event->pin);
205 static void acpi_gpio_chip_dh(acpi_handle handle, void *data)
207 /* The address of this function is used as a key. */
210 bool acpi_gpio_get_irq_resource(struct acpi_resource *ares,
211 struct acpi_resource_gpio **agpio)
213 struct acpi_resource_gpio *gpio;
215 if (ares->type != ACPI_RESOURCE_TYPE_GPIO)
218 gpio = &ares->data.gpio;
219 if (gpio->connection_type != ACPI_RESOURCE_GPIO_TYPE_INT)
225 EXPORT_SYMBOL_GPL(acpi_gpio_get_irq_resource);
228 * acpi_gpio_get_io_resource - Fetch details of an ACPI resource if it is a GPIO
229 * I/O resource or return False if not.
230 * @ares: Pointer to the ACPI resource to fetch
231 * @agpio: Pointer to a &struct acpi_resource_gpio to store the output pointer
233 bool acpi_gpio_get_io_resource(struct acpi_resource *ares,
234 struct acpi_resource_gpio **agpio)
236 struct acpi_resource_gpio *gpio;
238 if (ares->type != ACPI_RESOURCE_TYPE_GPIO)
241 gpio = &ares->data.gpio;
242 if (gpio->connection_type != ACPI_RESOURCE_GPIO_TYPE_IO)
248 EXPORT_SYMBOL_GPL(acpi_gpio_get_io_resource);
250 static void acpi_gpiochip_request_irq(struct acpi_gpio_chip *acpi_gpio,
251 struct acpi_gpio_event *event)
253 struct device *parent = acpi_gpio->chip->parent;
256 ret = request_threaded_irq(event->irq, NULL, event->handler,
257 event->irqflags | IRQF_ONESHOT, "ACPI:Event", event);
259 dev_err(parent, "Failed to setup interrupt handler for %d\n", event->irq);
263 if (event->irq_is_wake)
264 enable_irq_wake(event->irq);
266 event->irq_requested = true;
268 /* Make sure we trigger the initial state of edge-triggered IRQs */
269 if (run_edge_events_on_boot &&
270 (event->irqflags & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING))) {
271 value = gpiod_get_raw_value_cansleep(event->desc);
272 if (((event->irqflags & IRQF_TRIGGER_RISING) && value == 1) ||
273 ((event->irqflags & IRQF_TRIGGER_FALLING) && value == 0))
274 event->handler(event->irq, event);
278 static void acpi_gpiochip_request_irqs(struct acpi_gpio_chip *acpi_gpio)
280 struct acpi_gpio_event *event;
282 list_for_each_entry(event, &acpi_gpio->events, node)
283 acpi_gpiochip_request_irq(acpi_gpio, event);
286 static enum gpiod_flags
287 acpi_gpio_to_gpiod_flags(const struct acpi_resource_gpio *agpio, int polarity)
289 /* GpioInt() implies input configuration */
290 if (agpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT)
293 switch (agpio->io_restriction) {
294 case ACPI_IO_RESTRICT_INPUT:
296 case ACPI_IO_RESTRICT_OUTPUT:
298 * ACPI GPIO resources don't contain an initial value for the
299 * GPIO. Therefore we deduce that value from the pull field
300 * and the polarity instead. If the pin is pulled up we assume
301 * default to be high, if it is pulled down we assume default
302 * to be low, otherwise we leave pin untouched. For active low
303 * polarity values will be switched. See also
304 * Documentation/firmware-guide/acpi/gpio-properties.rst.
306 switch (agpio->pin_config) {
307 case ACPI_PIN_CONFIG_PULLUP:
308 return polarity == GPIO_ACTIVE_LOW ? GPIOD_OUT_LOW : GPIOD_OUT_HIGH;
309 case ACPI_PIN_CONFIG_PULLDOWN:
310 return polarity == GPIO_ACTIVE_LOW ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW;
320 * Assume that the BIOS has configured the direction and pull
326 static struct gpio_desc *acpi_request_own_gpiod(struct gpio_chip *chip,
327 struct acpi_resource_gpio *agpio,
331 int polarity = GPIO_ACTIVE_HIGH;
332 enum gpiod_flags flags = acpi_gpio_to_gpiod_flags(agpio, polarity);
333 unsigned int pin = agpio->pin_table[index];
334 struct gpio_desc *desc;
337 desc = gpiochip_request_own_desc(chip, pin, label, polarity, flags);
341 /* ACPI uses hundredths of milliseconds units */
342 ret = gpio_set_debounce_timeout(desc, agpio->debounce_timeout * 10);
344 dev_warn(chip->parent,
345 "Failed to set debounce-timeout for pin 0x%04X, err %d\n",
351 static bool acpi_gpio_in_ignore_list(const char *ignore_list, const char *controller_in,
354 const char *controller, *pin_str;
359 controller = ignore_list;
361 pin_str = strchr(controller, '@');
365 len = pin_str - controller;
366 if (len == strlen(controller_in) &&
367 strncmp(controller, controller_in, len) == 0) {
368 pin = simple_strtoul(pin_str + 1, &endp, 10);
369 if (*endp != 0 && *endp != ',')
376 controller = strchr(controller, ',');
383 pr_err_once("Error: Invalid value for gpiolib_acpi.ignore_...: %s\n", ignore_list);
387 static bool acpi_gpio_irq_is_wake(struct device *parent,
388 struct acpi_resource_gpio *agpio)
390 unsigned int pin = agpio->pin_table[0];
392 if (agpio->wake_capable != ACPI_WAKE_CAPABLE)
395 if (acpi_gpio_in_ignore_list(ignore_wake, dev_name(parent), pin)) {
396 dev_info(parent, "Ignoring wakeup on pin %u\n", pin);
403 /* Always returns AE_OK so that we keep looping over the resources */
404 static acpi_status acpi_gpiochip_alloc_event(struct acpi_resource *ares,
407 struct acpi_gpio_chip *acpi_gpio = context;
408 struct gpio_chip *chip = acpi_gpio->chip;
409 struct acpi_resource_gpio *agpio;
410 acpi_handle handle, evt_handle;
411 struct acpi_gpio_event *event;
412 irq_handler_t handler = NULL;
413 struct gpio_desc *desc;
417 if (!acpi_gpio_get_irq_resource(ares, &agpio))
420 handle = ACPI_HANDLE(chip->parent);
421 pin = agpio->pin_table[0];
425 sprintf(ev_name, "_%c%02X",
426 agpio->triggering == ACPI_EDGE_SENSITIVE ? 'E' : 'L',
428 if (ACPI_SUCCESS(acpi_get_handle(handle, ev_name, &evt_handle)))
429 handler = acpi_gpio_irq_handler;
432 if (ACPI_SUCCESS(acpi_get_handle(handle, "_EVT", &evt_handle)))
433 handler = acpi_gpio_irq_handler_evt;
438 desc = acpi_request_own_gpiod(chip, agpio, 0, "ACPI:Event");
440 dev_err(chip->parent,
441 "Failed to request GPIO for pin 0x%04X, err %ld\n",
446 ret = gpiochip_lock_as_irq(chip, pin);
448 dev_err(chip->parent,
449 "Failed to lock GPIO pin 0x%04X as interrupt, err %d\n",
454 irq = gpiod_to_irq(desc);
456 dev_err(chip->parent,
457 "Failed to translate GPIO pin 0x%04X to IRQ, err %d\n",
459 goto fail_unlock_irq;
462 if (acpi_gpio_in_ignore_list(ignore_interrupt, dev_name(chip->parent), pin)) {
463 dev_info(chip->parent, "Ignoring interrupt on pin %u\n", pin);
467 event = kzalloc(sizeof(*event), GFP_KERNEL);
469 goto fail_unlock_irq;
471 event->irqflags = IRQF_ONESHOT;
472 if (agpio->triggering == ACPI_LEVEL_SENSITIVE) {
473 if (agpio->polarity == ACPI_ACTIVE_HIGH)
474 event->irqflags |= IRQF_TRIGGER_HIGH;
476 event->irqflags |= IRQF_TRIGGER_LOW;
478 switch (agpio->polarity) {
479 case ACPI_ACTIVE_HIGH:
480 event->irqflags |= IRQF_TRIGGER_RISING;
482 case ACPI_ACTIVE_LOW:
483 event->irqflags |= IRQF_TRIGGER_FALLING;
486 event->irqflags |= IRQF_TRIGGER_RISING |
487 IRQF_TRIGGER_FALLING;
492 event->handle = evt_handle;
493 event->handler = handler;
495 event->irq_is_wake = acpi_gpio_irq_is_wake(chip->parent, agpio);
499 list_add_tail(&event->node, &acpi_gpio->events);
504 gpiochip_unlock_as_irq(chip, pin);
506 gpiochip_free_own_desc(desc);
512 * acpi_gpiochip_request_interrupts() - Register isr for gpio chip ACPI events
515 * ACPI5 platforms can use GPIO signaled ACPI events. These GPIO interrupts are
516 * handled by ACPI event methods which need to be called from the GPIO
517 * chip's interrupt handler. acpi_gpiochip_request_interrupts() finds out which
518 * GPIO pins have ACPI event methods and assigns interrupt handlers that calls
519 * the ACPI event methods for those pins.
521 void acpi_gpiochip_request_interrupts(struct gpio_chip *chip)
523 struct acpi_gpio_chip *acpi_gpio;
528 if (!chip->parent || !chip->to_irq)
531 handle = ACPI_HANDLE(chip->parent);
535 status = acpi_get_data(handle, acpi_gpio_chip_dh, (void **)&acpi_gpio);
536 if (ACPI_FAILURE(status))
539 acpi_walk_resources(handle, METHOD_NAME__AEI,
540 acpi_gpiochip_alloc_event, acpi_gpio);
542 mutex_lock(&acpi_gpio_deferred_req_irqs_lock);
543 defer = !acpi_gpio_deferred_req_irqs_done;
545 list_add(&acpi_gpio->deferred_req_irqs_list_entry,
546 &acpi_gpio_deferred_req_irqs_list);
547 mutex_unlock(&acpi_gpio_deferred_req_irqs_lock);
552 acpi_gpiochip_request_irqs(acpi_gpio);
554 EXPORT_SYMBOL_GPL(acpi_gpiochip_request_interrupts);
557 * acpi_gpiochip_free_interrupts() - Free GPIO ACPI event interrupts.
560 * Free interrupts associated with GPIO ACPI event method for the given
563 void acpi_gpiochip_free_interrupts(struct gpio_chip *chip)
565 struct acpi_gpio_chip *acpi_gpio;
566 struct acpi_gpio_event *event, *ep;
570 if (!chip->parent || !chip->to_irq)
573 handle = ACPI_HANDLE(chip->parent);
577 status = acpi_get_data(handle, acpi_gpio_chip_dh, (void **)&acpi_gpio);
578 if (ACPI_FAILURE(status))
581 mutex_lock(&acpi_gpio_deferred_req_irqs_lock);
582 if (!list_empty(&acpi_gpio->deferred_req_irqs_list_entry))
583 list_del_init(&acpi_gpio->deferred_req_irqs_list_entry);
584 mutex_unlock(&acpi_gpio_deferred_req_irqs_lock);
586 list_for_each_entry_safe_reverse(event, ep, &acpi_gpio->events, node) {
587 if (event->irq_requested) {
588 if (event->irq_is_wake)
589 disable_irq_wake(event->irq);
591 free_irq(event->irq, event);
594 gpiochip_unlock_as_irq(chip, event->pin);
595 gpiochip_free_own_desc(event->desc);
596 list_del(&event->node);
600 EXPORT_SYMBOL_GPL(acpi_gpiochip_free_interrupts);
602 int acpi_dev_add_driver_gpios(struct acpi_device *adev,
603 const struct acpi_gpio_mapping *gpios)
606 adev->driver_gpios = gpios;
611 EXPORT_SYMBOL_GPL(acpi_dev_add_driver_gpios);
613 void acpi_dev_remove_driver_gpios(struct acpi_device *adev)
616 adev->driver_gpios = NULL;
618 EXPORT_SYMBOL_GPL(acpi_dev_remove_driver_gpios);
620 static void acpi_dev_release_driver_gpios(void *adev)
622 acpi_dev_remove_driver_gpios(adev);
625 int devm_acpi_dev_add_driver_gpios(struct device *dev,
626 const struct acpi_gpio_mapping *gpios)
628 struct acpi_device *adev = ACPI_COMPANION(dev);
631 ret = acpi_dev_add_driver_gpios(adev, gpios);
635 return devm_add_action_or_reset(dev, acpi_dev_release_driver_gpios, adev);
637 EXPORT_SYMBOL_GPL(devm_acpi_dev_add_driver_gpios);
639 static bool acpi_get_driver_gpio_data(struct acpi_device *adev,
640 const char *name, int index,
641 struct fwnode_reference_args *args,
642 unsigned int *quirks)
644 const struct acpi_gpio_mapping *gm;
646 if (!adev->driver_gpios)
649 for (gm = adev->driver_gpios; gm->name; gm++)
650 if (!strcmp(name, gm->name) && gm->data && index < gm->size) {
651 const struct acpi_gpio_params *par = gm->data + index;
653 args->fwnode = acpi_fwnode_handle(adev);
654 args->args[0] = par->crs_entry_index;
655 args->args[1] = par->line_index;
656 args->args[2] = par->active_low;
659 *quirks = gm->quirks;
667 __acpi_gpio_update_gpiod_flags(enum gpiod_flags *flags, enum gpiod_flags update)
669 const enum gpiod_flags mask =
670 GPIOD_FLAGS_BIT_DIR_SET | GPIOD_FLAGS_BIT_DIR_OUT |
671 GPIOD_FLAGS_BIT_DIR_VAL;
675 * Check if the BIOS has IoRestriction with explicitly set direction
676 * and update @flags accordingly. Otherwise use whatever caller asked
679 if (update & GPIOD_FLAGS_BIT_DIR_SET) {
680 enum gpiod_flags diff = *flags ^ update;
683 * Check if caller supplied incompatible GPIO initialization
686 * Return %-EINVAL to notify that firmware has different
687 * settings and we are going to use them.
689 if (((*flags & GPIOD_FLAGS_BIT_DIR_SET) && (diff & GPIOD_FLAGS_BIT_DIR_OUT)) ||
690 ((*flags & GPIOD_FLAGS_BIT_DIR_OUT) && (diff & GPIOD_FLAGS_BIT_DIR_VAL)))
692 *flags = (*flags & ~mask) | (update & mask);
697 static int acpi_gpio_update_gpiod_flags(enum gpiod_flags *flags,
698 struct acpi_gpio_info *info)
700 struct device *dev = &info->adev->dev;
701 enum gpiod_flags old = *flags;
704 ret = __acpi_gpio_update_gpiod_flags(&old, info->flags);
705 if (info->quirks & ACPI_GPIO_QUIRK_NO_IO_RESTRICTION) {
707 dev_warn(dev, FW_BUG "GPIO not in correct mode, fixing\n");
710 dev_dbg(dev, "Override GPIO initialization flags\n");
717 static int acpi_gpio_update_gpiod_lookup_flags(unsigned long *lookupflags,
718 struct acpi_gpio_info *info)
720 switch (info->pin_config) {
721 case ACPI_PIN_CONFIG_PULLUP:
722 *lookupflags |= GPIO_PULL_UP;
724 case ACPI_PIN_CONFIG_PULLDOWN:
725 *lookupflags |= GPIO_PULL_DOWN;
727 case ACPI_PIN_CONFIG_NOPULL:
728 *lookupflags |= GPIO_PULL_DISABLE;
734 if (info->polarity == GPIO_ACTIVE_LOW)
735 *lookupflags |= GPIO_ACTIVE_LOW;
740 struct acpi_gpio_lookup {
741 struct acpi_gpio_info info;
745 struct gpio_desc *desc;
749 static int acpi_populate_gpio_lookup(struct acpi_resource *ares, void *data)
751 struct acpi_gpio_lookup *lookup = data;
753 if (ares->type != ACPI_RESOURCE_TYPE_GPIO)
757 const struct acpi_resource_gpio *agpio = &ares->data.gpio;
758 bool gpioint = agpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT;
759 struct gpio_desc *desc;
762 if (lookup->info.quirks & ACPI_GPIO_QUIRK_ONLY_GPIOIO && gpioint)
765 if (lookup->n++ != lookup->index)
768 pin_index = lookup->pin_index;
769 if (pin_index >= agpio->pin_table_length)
772 if (lookup->info.quirks & ACPI_GPIO_QUIRK_ABSOLUTE_NUMBER)
773 desc = gpio_to_desc(agpio->pin_table[pin_index]);
775 desc = acpi_get_gpiod(agpio->resource_source.string_ptr,
776 agpio->pin_table[pin_index]);
778 lookup->info.pin_config = agpio->pin_config;
779 lookup->info.debounce = agpio->debounce_timeout;
780 lookup->info.gpioint = gpioint;
781 lookup->info.wake_capable = agpio->wake_capable == ACPI_WAKE_CAPABLE;
784 * Polarity and triggering are only specified for GpioInt
786 * Note: we expect here:
787 * - ACPI_ACTIVE_LOW == GPIO_ACTIVE_LOW
788 * - ACPI_ACTIVE_HIGH == GPIO_ACTIVE_HIGH
790 if (lookup->info.gpioint) {
791 lookup->info.polarity = agpio->polarity;
792 lookup->info.triggering = agpio->triggering;
794 lookup->info.polarity = lookup->active_low;
797 lookup->info.flags = acpi_gpio_to_gpiod_flags(agpio, lookup->info.polarity);
803 static int acpi_gpio_resource_lookup(struct acpi_gpio_lookup *lookup,
804 struct acpi_gpio_info *info)
806 struct acpi_device *adev = lookup->info.adev;
807 struct list_head res_list;
810 INIT_LIST_HEAD(&res_list);
812 ret = acpi_dev_get_resources(adev, &res_list,
813 acpi_populate_gpio_lookup,
818 acpi_dev_free_resource_list(&res_list);
824 *info = lookup->info;
828 static int acpi_gpio_property_lookup(struct fwnode_handle *fwnode,
829 const char *propname, int index,
830 struct acpi_gpio_lookup *lookup)
832 struct fwnode_reference_args args;
833 unsigned int quirks = 0;
836 memset(&args, 0, sizeof(args));
837 ret = __acpi_node_get_property_reference(fwnode, propname, index, 3,
840 struct acpi_device *adev = to_acpi_device_node(fwnode);
845 if (!acpi_get_driver_gpio_data(adev, propname, index, &args,
850 * The property was found and resolved, so need to lookup the GPIO based
853 if (!to_acpi_device_node(args.fwnode))
858 lookup->index = args.args[0];
859 lookup->pin_index = args.args[1];
860 lookup->active_low = !!args.args[2];
862 lookup->info.adev = to_acpi_device_node(args.fwnode);
863 lookup->info.quirks = quirks;
869 * acpi_get_gpiod_by_index() - get a GPIO descriptor from device resources
870 * @adev: pointer to a ACPI device to get GPIO from
871 * @propname: Property name of the GPIO (optional)
872 * @index: index of GpioIo/GpioInt resource (starting from %0)
873 * @info: info pointer to fill in (optional)
875 * Function goes through ACPI resources for @adev and based on @index looks
876 * up a GpioIo/GpioInt resource, translates it to the Linux GPIO descriptor,
877 * and returns it. @index matches GpioIo/GpioInt resources only so if there
878 * are total %3 GPIO resources, the index goes from %0 to %2.
880 * If @propname is specified the GPIO is looked using device property. In
881 * that case @index is used to select the GPIO entry in the property value
882 * (in case of multiple).
884 * If the GPIO cannot be translated or there is an error, an ERR_PTR is
887 * Note: if the GPIO resource has multiple entries in the pin list, this
888 * function only returns the first.
890 static struct gpio_desc *acpi_get_gpiod_by_index(struct acpi_device *adev,
891 const char *propname,
893 struct acpi_gpio_info *info)
895 struct acpi_gpio_lookup lookup;
899 return ERR_PTR(-ENODEV);
901 memset(&lookup, 0, sizeof(lookup));
902 lookup.index = index;
905 dev_dbg(&adev->dev, "GPIO: looking up %s\n", propname);
907 ret = acpi_gpio_property_lookup(acpi_fwnode_handle(adev),
908 propname, index, &lookup);
912 dev_dbg(&adev->dev, "GPIO: _DSD returned %s %d %u %u\n",
913 dev_name(&lookup.info.adev->dev), lookup.index,
914 lookup.pin_index, lookup.active_low);
916 dev_dbg(&adev->dev, "GPIO: looking up %d in _CRS\n", index);
917 lookup.info.adev = adev;
920 ret = acpi_gpio_resource_lookup(&lookup, info);
921 return ret ? ERR_PTR(ret) : lookup.desc;
925 * acpi_get_gpiod_from_data() - get a GPIO descriptor from ACPI data node
926 * @fwnode: pointer to an ACPI firmware node to get the GPIO information from
927 * @propname: Property name of the GPIO
928 * @index: index of GpioIo/GpioInt resource (starting from %0)
929 * @info: info pointer to fill in (optional)
931 * This function uses the property-based GPIO lookup to get to the GPIO
932 * resource with the relevant information from a data-only ACPI firmware node
933 * and uses that to obtain the GPIO descriptor to return.
935 * If the GPIO cannot be translated or there is an error an ERR_PTR is
938 static struct gpio_desc *acpi_get_gpiod_from_data(struct fwnode_handle *fwnode,
939 const char *propname,
941 struct acpi_gpio_info *info)
943 struct acpi_gpio_lookup lookup;
946 if (!is_acpi_data_node(fwnode))
947 return ERR_PTR(-ENODEV);
950 return ERR_PTR(-EINVAL);
952 lookup.index = index;
954 ret = acpi_gpio_property_lookup(fwnode, propname, index, &lookup);
958 ret = acpi_gpio_resource_lookup(&lookup, info);
959 return ret ? ERR_PTR(ret) : lookup.desc;
962 static bool acpi_can_fallback_to_crs(struct acpi_device *adev,
965 /* Never allow fallback if the device has properties */
966 if (acpi_dev_has_props(adev) || adev->driver_gpios)
969 return con_id == NULL;
972 struct gpio_desc *acpi_find_gpio(struct fwnode_handle *fwnode,
975 enum gpiod_flags *dflags,
976 unsigned long *lookupflags)
978 struct acpi_device *adev = to_acpi_device_node(fwnode);
979 struct acpi_gpio_info info;
980 struct gpio_desc *desc;
984 /* Try first from _DSD */
985 for (i = 0; i < ARRAY_SIZE(gpio_suffixes); i++) {
987 snprintf(propname, sizeof(propname), "%s-%s",
988 con_id, gpio_suffixes[i]);
990 snprintf(propname, sizeof(propname), "%s",
995 desc = acpi_get_gpiod_by_index(adev,
996 propname, idx, &info);
998 desc = acpi_get_gpiod_from_data(fwnode,
999 propname, idx, &info);
1002 if (PTR_ERR(desc) == -EPROBE_DEFER)
1003 return ERR_CAST(desc);
1006 /* Then from plain _CRS GPIOs */
1008 if (!adev || !acpi_can_fallback_to_crs(adev, con_id))
1009 return ERR_PTR(-ENOENT);
1011 desc = acpi_get_gpiod_by_index(adev, NULL, idx, &info);
1017 (*dflags == GPIOD_OUT_LOW || *dflags == GPIOD_OUT_HIGH)) {
1018 dev_dbg(&adev->dev, "refusing GpioInt() entry when doing GPIOD_OUT_* lookup\n");
1019 return ERR_PTR(-ENOENT);
1022 acpi_gpio_update_gpiod_flags(dflags, &info);
1023 acpi_gpio_update_gpiod_lookup_flags(lookupflags, &info);
1028 * acpi_dev_gpio_irq_wake_get_by() - Find GpioInt and translate it to Linux IRQ number
1029 * @adev: pointer to a ACPI device to get IRQ from
1030 * @name: optional name of GpioInt resource
1031 * @index: index of GpioInt resource (starting from %0)
1032 * @wake_capable: Set to true if the IRQ is wake capable
1034 * If the device has one or more GpioInt resources, this function can be
1035 * used to translate from the GPIO offset in the resource to the Linux IRQ
1038 * The function is idempotent, though each time it runs it will configure GPIO
1039 * pin direction according to the flags in GpioInt resource.
1041 * The function takes optional @name parameter. If the resource has a property
1042 * name, then only those will be taken into account.
1044 * The GPIO is considered wake capable if the GpioInt resource specifies
1045 * SharedAndWake or ExclusiveAndWake.
1047 * Return: Linux IRQ number (> %0) on success, negative errno on failure.
1049 int acpi_dev_gpio_irq_wake_get_by(struct acpi_device *adev, const char *name, int index,
1053 unsigned int irq_flags;
1056 for (i = 0, idx = 0; idx <= index; i++) {
1057 struct acpi_gpio_info info;
1058 struct gpio_desc *desc;
1060 desc = acpi_get_gpiod_by_index(adev, name, i, &info);
1062 /* Ignore -EPROBE_DEFER, it only matters if idx matches */
1063 if (IS_ERR(desc) && PTR_ERR(desc) != -EPROBE_DEFER)
1064 return PTR_ERR(desc);
1066 if (info.gpioint && idx++ == index) {
1067 unsigned long lflags = GPIO_LOOKUP_FLAGS_DEFAULT;
1068 enum gpiod_flags dflags = GPIOD_ASIS;
1073 return PTR_ERR(desc);
1075 irq = gpiod_to_irq(desc);
1079 acpi_gpio_update_gpiod_flags(&dflags, &info);
1080 acpi_gpio_update_gpiod_lookup_flags(&lflags, &info);
1082 snprintf(label, sizeof(label), "GpioInt() %d", index);
1083 ret = gpiod_configure_flags(desc, label, lflags, dflags);
1087 /* ACPI uses hundredths of milliseconds units */
1088 ret = gpio_set_debounce_timeout(desc, info.debounce * 10);
1092 irq_flags = acpi_dev_get_irq_type(info.triggering,
1096 * If the IRQ is not already in use then set type
1097 * if specified and different than the current one.
1099 if (can_request_irq(irq, irq_flags)) {
1100 if (irq_flags != IRQ_TYPE_NONE &&
1101 irq_flags != irq_get_trigger_type(irq))
1102 irq_set_irq_type(irq, irq_flags);
1104 dev_dbg(&adev->dev, "IRQ %d already in use\n", irq);
1108 *wake_capable = info.wake_capable;
1116 EXPORT_SYMBOL_GPL(acpi_dev_gpio_irq_wake_get_by);
1119 acpi_gpio_adr_space_handler(u32 function, acpi_physical_address address,
1120 u32 bits, u64 *value, void *handler_context,
1121 void *region_context)
1123 struct acpi_gpio_chip *achip = region_context;
1124 struct gpio_chip *chip = achip->chip;
1125 struct acpi_resource_gpio *agpio;
1126 struct acpi_resource *ares;
1127 u16 pin_index = address;
1132 status = acpi_buffer_to_resource(achip->conn_info.connection,
1133 achip->conn_info.length, &ares);
1134 if (ACPI_FAILURE(status))
1137 if (WARN_ON(ares->type != ACPI_RESOURCE_TYPE_GPIO)) {
1139 return AE_BAD_PARAMETER;
1142 agpio = &ares->data.gpio;
1144 if (WARN_ON(agpio->io_restriction == ACPI_IO_RESTRICT_INPUT &&
1145 function == ACPI_WRITE)) {
1147 return AE_BAD_PARAMETER;
1150 length = min_t(u16, agpio->pin_table_length, pin_index + bits);
1151 for (i = pin_index; i < length; ++i) {
1152 unsigned int pin = agpio->pin_table[i];
1153 struct acpi_gpio_connection *conn;
1154 struct gpio_desc *desc;
1157 mutex_lock(&achip->conn_lock);
1160 list_for_each_entry(conn, &achip->conns, node) {
1161 if (conn->pin == pin) {
1169 * The same GPIO can be shared between operation region and
1170 * event but only if the access here is ACPI_READ. In that
1171 * case we "borrow" the event GPIO instead.
1173 if (!found && agpio->shareable == ACPI_SHARED &&
1174 function == ACPI_READ) {
1175 struct acpi_gpio_event *event;
1177 list_for_each_entry(event, &achip->events, node) {
1178 if (event->pin == pin) {
1187 desc = acpi_request_own_gpiod(chip, agpio, i, "ACPI:OpRegion");
1189 mutex_unlock(&achip->conn_lock);
1194 conn = kzalloc(sizeof(*conn), GFP_KERNEL);
1196 gpiochip_free_own_desc(desc);
1197 mutex_unlock(&achip->conn_lock);
1198 status = AE_NO_MEMORY;
1204 list_add_tail(&conn->node, &achip->conns);
1207 mutex_unlock(&achip->conn_lock);
1209 if (function == ACPI_WRITE)
1210 gpiod_set_raw_value_cansleep(desc, !!(*value & BIT(i)));
1212 *value |= (u64)gpiod_get_raw_value_cansleep(desc) << i;
1220 static void acpi_gpiochip_request_regions(struct acpi_gpio_chip *achip)
1222 struct gpio_chip *chip = achip->chip;
1223 acpi_handle handle = ACPI_HANDLE(chip->parent);
1226 INIT_LIST_HEAD(&achip->conns);
1227 mutex_init(&achip->conn_lock);
1228 status = acpi_install_address_space_handler(handle, ACPI_ADR_SPACE_GPIO,
1229 acpi_gpio_adr_space_handler,
1231 if (ACPI_FAILURE(status))
1232 dev_err(chip->parent,
1233 "Failed to install GPIO OpRegion handler\n");
1236 static void acpi_gpiochip_free_regions(struct acpi_gpio_chip *achip)
1238 struct gpio_chip *chip = achip->chip;
1239 acpi_handle handle = ACPI_HANDLE(chip->parent);
1240 struct acpi_gpio_connection *conn, *tmp;
1243 status = acpi_remove_address_space_handler(handle, ACPI_ADR_SPACE_GPIO,
1244 acpi_gpio_adr_space_handler);
1245 if (ACPI_FAILURE(status)) {
1246 dev_err(chip->parent,
1247 "Failed to remove GPIO OpRegion handler\n");
1251 list_for_each_entry_safe_reverse(conn, tmp, &achip->conns, node) {
1252 gpiochip_free_own_desc(conn->desc);
1253 list_del(&conn->node);
1258 static struct gpio_desc *
1259 acpi_gpiochip_parse_own_gpio(struct acpi_gpio_chip *achip,
1260 struct fwnode_handle *fwnode,
1262 unsigned long *lflags,
1263 enum gpiod_flags *dflags)
1265 struct gpio_chip *chip = achip->chip;
1266 struct gpio_desc *desc;
1270 *lflags = GPIO_LOOKUP_FLAGS_DEFAULT;
1271 *dflags = GPIOD_ASIS;
1274 ret = fwnode_property_read_u32_array(fwnode, "gpios", gpios,
1277 return ERR_PTR(ret);
1279 desc = gpiochip_get_desc(chip, gpios[0]);
1284 *lflags |= GPIO_ACTIVE_LOW;
1286 if (fwnode_property_present(fwnode, "input"))
1287 *dflags |= GPIOD_IN;
1288 else if (fwnode_property_present(fwnode, "output-low"))
1289 *dflags |= GPIOD_OUT_LOW;
1290 else if (fwnode_property_present(fwnode, "output-high"))
1291 *dflags |= GPIOD_OUT_HIGH;
1293 return ERR_PTR(-EINVAL);
1295 fwnode_property_read_string(fwnode, "line-name", name);
1300 static void acpi_gpiochip_scan_gpios(struct acpi_gpio_chip *achip)
1302 struct gpio_chip *chip = achip->chip;
1303 struct fwnode_handle *fwnode;
1305 device_for_each_child_node(chip->parent, fwnode) {
1306 unsigned long lflags;
1307 enum gpiod_flags dflags;
1308 struct gpio_desc *desc;
1312 if (!fwnode_property_present(fwnode, "gpio-hog"))
1315 desc = acpi_gpiochip_parse_own_gpio(achip, fwnode, &name,
1320 ret = gpiod_hog(desc, name, lflags, dflags);
1322 dev_err(chip->parent, "Failed to hog GPIO\n");
1323 fwnode_handle_put(fwnode);
1329 void acpi_gpiochip_add(struct gpio_chip *chip)
1331 struct acpi_gpio_chip *acpi_gpio;
1332 struct acpi_device *adev;
1335 if (!chip || !chip->parent)
1338 adev = ACPI_COMPANION(chip->parent);
1342 acpi_gpio = kzalloc(sizeof(*acpi_gpio), GFP_KERNEL);
1344 dev_err(chip->parent,
1345 "Failed to allocate memory for ACPI GPIO chip\n");
1349 acpi_gpio->chip = chip;
1350 INIT_LIST_HEAD(&acpi_gpio->events);
1351 INIT_LIST_HEAD(&acpi_gpio->deferred_req_irqs_list_entry);
1353 status = acpi_attach_data(adev->handle, acpi_gpio_chip_dh, acpi_gpio);
1354 if (ACPI_FAILURE(status)) {
1355 dev_err(chip->parent, "Failed to attach ACPI GPIO chip\n");
1360 acpi_gpiochip_request_regions(acpi_gpio);
1361 acpi_gpiochip_scan_gpios(acpi_gpio);
1362 acpi_dev_clear_dependencies(adev);
1365 void acpi_gpiochip_remove(struct gpio_chip *chip)
1367 struct acpi_gpio_chip *acpi_gpio;
1371 if (!chip || !chip->parent)
1374 handle = ACPI_HANDLE(chip->parent);
1378 status = acpi_get_data(handle, acpi_gpio_chip_dh, (void **)&acpi_gpio);
1379 if (ACPI_FAILURE(status)) {
1380 dev_warn(chip->parent, "Failed to retrieve ACPI GPIO chip\n");
1384 acpi_gpiochip_free_regions(acpi_gpio);
1386 acpi_detach_data(handle, acpi_gpio_chip_dh);
1390 void acpi_gpio_dev_init(struct gpio_chip *gc, struct gpio_device *gdev)
1392 /* Set default fwnode to parent's one if present */
1394 ACPI_COMPANION_SET(&gdev->dev, ACPI_COMPANION(gc->parent));
1397 device_set_node(&gdev->dev, gc->fwnode);
1400 static int acpi_gpio_package_count(const union acpi_object *obj)
1402 const union acpi_object *element = obj->package.elements;
1403 const union acpi_object *end = element + obj->package.count;
1404 unsigned int count = 0;
1406 while (element < end) {
1407 switch (element->type) {
1408 case ACPI_TYPE_LOCAL_REFERENCE:
1411 case ACPI_TYPE_INTEGER:
1424 static int acpi_find_gpio_count(struct acpi_resource *ares, void *data)
1426 unsigned int *count = data;
1428 if (ares->type == ACPI_RESOURCE_TYPE_GPIO)
1429 *count += ares->data.gpio.pin_table_length;
1435 * acpi_gpio_count - count the GPIOs associated with a device / function
1436 * @dev: GPIO consumer, can be %NULL for system-global GPIOs
1437 * @con_id: function within the GPIO consumer
1440 * The number of GPIOs associated with a device / function or %-ENOENT,
1441 * if no GPIO has been assigned to the requested function.
1443 int acpi_gpio_count(struct device *dev, const char *con_id)
1445 struct acpi_device *adev = ACPI_COMPANION(dev);
1446 const union acpi_object *obj;
1447 const struct acpi_gpio_mapping *gm;
1448 int count = -ENOENT;
1453 /* Try first from _DSD */
1454 for (i = 0; i < ARRAY_SIZE(gpio_suffixes); i++) {
1456 snprintf(propname, sizeof(propname), "%s-%s",
1457 con_id, gpio_suffixes[i]);
1459 snprintf(propname, sizeof(propname), "%s",
1462 ret = acpi_dev_get_property(adev, propname, ACPI_TYPE_ANY,
1465 if (obj->type == ACPI_TYPE_LOCAL_REFERENCE)
1467 else if (obj->type == ACPI_TYPE_PACKAGE)
1468 count = acpi_gpio_package_count(obj);
1469 } else if (adev->driver_gpios) {
1470 for (gm = adev->driver_gpios; gm->name; gm++)
1471 if (strcmp(propname, gm->name) == 0) {
1480 /* Then from plain _CRS GPIOs */
1482 struct list_head resource_list;
1483 unsigned int crs_count = 0;
1485 if (!acpi_can_fallback_to_crs(adev, con_id))
1488 INIT_LIST_HEAD(&resource_list);
1489 acpi_dev_get_resources(adev, &resource_list,
1490 acpi_find_gpio_count, &crs_count);
1491 acpi_dev_free_resource_list(&resource_list);
1495 return count ? count : -ENOENT;
1498 /* Run deferred acpi_gpiochip_request_irqs() */
1499 static int __init acpi_gpio_handle_deferred_request_irqs(void)
1501 struct acpi_gpio_chip *acpi_gpio, *tmp;
1503 mutex_lock(&acpi_gpio_deferred_req_irqs_lock);
1504 list_for_each_entry_safe(acpi_gpio, tmp,
1505 &acpi_gpio_deferred_req_irqs_list,
1506 deferred_req_irqs_list_entry)
1507 acpi_gpiochip_request_irqs(acpi_gpio);
1509 acpi_gpio_deferred_req_irqs_done = true;
1510 mutex_unlock(&acpi_gpio_deferred_req_irqs_lock);
1514 /* We must use _sync so that this runs after the first deferred_probe run */
1515 late_initcall_sync(acpi_gpio_handle_deferred_request_irqs);
1517 static const struct dmi_system_id gpiolib_acpi_quirks[] __initconst = {
1520 * The Minix Neo Z83-4 has a micro-USB-B id-pin handler for
1521 * a non existing micro-USB-B connector which puts the HDMI
1522 * DDC pins in GPIO mode, breaking HDMI support.
1525 DMI_MATCH(DMI_SYS_VENDOR, "MINIX"),
1526 DMI_MATCH(DMI_PRODUCT_NAME, "Z83-4"),
1528 .driver_data = &(struct acpi_gpiolib_dmi_quirk) {
1529 .no_edge_events_on_boot = true,
1534 * The Terra Pad 1061 has a micro-USB-B id-pin handler, which
1535 * instead of controlling the actual micro-USB-B turns the 5V
1536 * boost for its USB-A connector off. The actual micro-USB-B
1537 * connector is wired for charging only.
1540 DMI_MATCH(DMI_SYS_VENDOR, "Wortmann_AG"),
1541 DMI_MATCH(DMI_PRODUCT_NAME, "TERRA_PAD_1061"),
1543 .driver_data = &(struct acpi_gpiolib_dmi_quirk) {
1544 .no_edge_events_on_boot = true,
1549 * The Dell Venue 10 Pro 5055, with Bay Trail SoC + TI PMIC uses an
1550 * external embedded-controller connected via I2C + an ACPI GPIO
1551 * event handler on INT33FFC:02 pin 12, causing spurious wakeups.
1554 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
1555 DMI_MATCH(DMI_PRODUCT_NAME, "Venue 10 Pro 5055"),
1557 .driver_data = &(struct acpi_gpiolib_dmi_quirk) {
1558 .ignore_wake = "INT33FC:02@12",
1563 * HP X2 10 models with Cherry Trail SoC + TI PMIC use an
1564 * external embedded-controller connected via I2C + an ACPI GPIO
1565 * event handler on INT33FF:01 pin 0, causing spurious wakeups.
1566 * When suspending by closing the LID, the power to the USB
1567 * keyboard is turned off, causing INT0002 ACPI events to
1568 * trigger once the XHCI controller notices the keyboard is
1569 * gone. So INT0002 events cause spurious wakeups too. Ignoring
1570 * EC wakes breaks wakeup when opening the lid, the user needs
1571 * to press the power-button to wakeup the system. The
1572 * alternative is suspend simply not working, which is worse.
1575 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
1576 DMI_MATCH(DMI_PRODUCT_NAME, "HP x2 Detachable 10-p0XX"),
1578 .driver_data = &(struct acpi_gpiolib_dmi_quirk) {
1579 .ignore_wake = "INT33FF:01@0,INT0002:00@2",
1584 * HP X2 10 models with Bay Trail SoC + AXP288 PMIC use an
1585 * external embedded-controller connected via I2C + an ACPI GPIO
1586 * event handler on INT33FC:02 pin 28, causing spurious wakeups.
1589 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1590 DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion x2 Detachable"),
1591 DMI_MATCH(DMI_BOARD_NAME, "815D"),
1593 .driver_data = &(struct acpi_gpiolib_dmi_quirk) {
1594 .ignore_wake = "INT33FC:02@28",
1599 * HP X2 10 models with Cherry Trail SoC + AXP288 PMIC use an
1600 * external embedded-controller connected via I2C + an ACPI GPIO
1601 * event handler on INT33FF:01 pin 0, causing spurious wakeups.
1604 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
1605 DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion x2 Detachable"),
1606 DMI_MATCH(DMI_BOARD_NAME, "813E"),
1608 .driver_data = &(struct acpi_gpiolib_dmi_quirk) {
1609 .ignore_wake = "INT33FF:01@0",
1614 * Interrupt storm caused from edge triggered floating pin
1615 * Found in BIOS UX325UAZ.300
1616 * https://bugzilla.kernel.org/show_bug.cgi?id=216208
1619 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
1620 DMI_MATCH(DMI_PRODUCT_NAME, "ZenBook UX325UAZ_UM325UAZ"),
1622 .driver_data = &(struct acpi_gpiolib_dmi_quirk) {
1623 .ignore_interrupt = "AMDI0030:00@18",
1626 {} /* Terminating entry */
1629 static int __init acpi_gpio_setup_params(void)
1631 const struct acpi_gpiolib_dmi_quirk *quirk = NULL;
1632 const struct dmi_system_id *id;
1634 id = dmi_first_match(gpiolib_acpi_quirks);
1636 quirk = id->driver_data;
1638 if (run_edge_events_on_boot < 0) {
1639 if (quirk && quirk->no_edge_events_on_boot)
1640 run_edge_events_on_boot = 0;
1642 run_edge_events_on_boot = 1;
1645 if (ignore_wake == NULL && quirk && quirk->ignore_wake)
1646 ignore_wake = quirk->ignore_wake;
1648 if (ignore_interrupt == NULL && quirk && quirk->ignore_interrupt)
1649 ignore_interrupt = quirk->ignore_interrupt;
1654 /* Directly after dmi_setup() which runs as core_initcall() */
1655 postcore_initcall(acpi_gpio_setup_params);