1 // SPDX-License-Identifier: GPL-2.0
3 * ACPI helpers for GPIO API
5 * Copyright (C) 2012, Intel Corporation
6 * Authors: Mathias Nyman <mathias.nyman@linux.intel.com>
7 * Mika Westerberg <mika.westerberg@linux.intel.com>
10 #include <linux/acpi.h>
11 #include <linux/dmi.h>
12 #include <linux/errno.h>
13 #include <linux/export.h>
14 #include <linux/interrupt.h>
15 #include <linux/irq.h>
16 #include <linux/mutex.h>
17 #include <linux/pinctrl/pinctrl.h>
19 #include <linux/gpio/consumer.h>
20 #include <linux/gpio/driver.h>
21 #include <linux/gpio/machine.h>
24 #include "gpiolib-acpi.h"
26 static int run_edge_events_on_boot = -1;
27 module_param(run_edge_events_on_boot, int, 0444);
28 MODULE_PARM_DESC(run_edge_events_on_boot,
29 "Run edge _AEI event-handlers at boot: 0=no, 1=yes, -1=auto");
31 static char *ignore_wake;
32 module_param(ignore_wake, charp, 0444);
33 MODULE_PARM_DESC(ignore_wake,
34 "controller@pin combos on which to ignore the ACPI wake flag "
35 "ignore_wake=controller@pin[,controller@pin[,...]]");
37 static char *ignore_interrupt;
38 module_param(ignore_interrupt, charp, 0444);
39 MODULE_PARM_DESC(ignore_interrupt,
40 "controller@pin combos on which to ignore interrupt "
41 "ignore_interrupt=controller@pin[,controller@pin[,...]]");
43 struct acpi_gpiolib_dmi_quirk {
44 bool no_edge_events_on_boot;
46 char *ignore_interrupt;
50 * struct acpi_gpio_event - ACPI GPIO event handler data
52 * @node: list-entry of the events list of the struct acpi_gpio_chip
53 * @handle: handle of ACPI method to execute when the IRQ triggers
54 * @handler: handler function to pass to request_irq() when requesting the IRQ
55 * @pin: GPIO pin number on the struct gpio_chip
56 * @irq: Linux IRQ number for the event, for request_irq() / free_irq()
57 * @irqflags: flags to pass to request_irq() when requesting the IRQ
58 * @irq_is_wake: If the ACPI flags indicate the IRQ is a wakeup source
59 * @irq_requested:True if request_irq() has been done
60 * @desc: struct gpio_desc for the GPIO pin for this event
62 struct acpi_gpio_event {
63 struct list_head node;
65 irq_handler_t handler;
68 unsigned long irqflags;
71 struct gpio_desc *desc;
74 struct acpi_gpio_connection {
75 struct list_head node;
77 struct gpio_desc *desc;
80 struct acpi_gpio_chip {
82 * ACPICA requires that the first field of the context parameter
83 * passed to acpi_install_address_space_handler() is large enough
84 * to hold struct acpi_connection_info.
86 struct acpi_connection_info conn_info;
87 struct list_head conns;
88 struct mutex conn_lock;
89 struct gpio_chip *chip;
90 struct list_head events;
91 struct list_head deferred_req_irqs_list_entry;
95 * struct acpi_gpio_info - ACPI GPIO specific information
96 * @adev: reference to ACPI device which consumes GPIO resource
97 * @flags: GPIO initialization flags
98 * @gpioint: if %true this GPIO is of type GpioInt otherwise type is GpioIo
99 * @pin_config: pin bias as provided by ACPI
100 * @polarity: interrupt polarity as provided by ACPI
101 * @triggering: triggering type as provided by ACPI
102 * @wake_capable: wake capability as provided by ACPI
103 * @debounce: debounce timeout as provided by ACPI
104 * @quirks: Linux specific quirks as provided by struct acpi_gpio_mapping
106 struct acpi_gpio_info {
107 struct acpi_device *adev;
108 enum gpiod_flags flags;
114 unsigned int debounce;
119 * For GPIO chips which call acpi_gpiochip_request_interrupts() before late_init
120 * (so builtin drivers) we register the ACPI GpioInt IRQ handlers from a
121 * late_initcall_sync() handler, so that other builtin drivers can register their
122 * OpRegions before the event handlers can run. This list contains GPIO chips
123 * for which the acpi_gpiochip_request_irqs() call has been deferred.
125 static DEFINE_MUTEX(acpi_gpio_deferred_req_irqs_lock);
126 static LIST_HEAD(acpi_gpio_deferred_req_irqs_list);
127 static bool acpi_gpio_deferred_req_irqs_done;
129 static int acpi_gpiochip_find(struct gpio_chip *gc, void *data)
131 return device_match_acpi_handle(&gc->gpiodev->dev, data);
135 * acpi_get_gpiod() - Translate ACPI GPIO pin to GPIO descriptor usable with GPIO API
136 * @path: ACPI GPIO controller full path name, (e.g. "\\_SB.GPO1")
137 * @pin: ACPI GPIO pin number (0-based, controller-relative)
139 * Return: GPIO descriptor to use with Linux generic GPIO API, or ERR_PTR
140 * error value. Specifically returns %-EPROBE_DEFER if the referenced GPIO
141 * controller does not have GPIO chip registered at the moment. This is to
142 * support probe deferral.
144 static struct gpio_desc *acpi_get_gpiod(char *path, unsigned int pin)
146 struct gpio_chip *chip;
150 status = acpi_get_handle(NULL, path, &handle);
151 if (ACPI_FAILURE(status))
152 return ERR_PTR(-ENODEV);
154 chip = gpiochip_find(handle, acpi_gpiochip_find);
156 return ERR_PTR(-EPROBE_DEFER);
158 return gpiochip_get_desc(chip, pin);
162 * acpi_get_and_request_gpiod - Translate ACPI GPIO pin to GPIO descriptor and
163 * hold a refcount to the GPIO device.
164 * @path: ACPI GPIO controller full path name, (e.g. "\\_SB.GPO1")
165 * @pin: ACPI GPIO pin number (0-based, controller-relative)
166 * @label: Label to pass to gpiod_request()
168 * This function is a simple pass-through to acpi_get_gpiod(), except that
169 * as it is intended for use outside of the GPIO layer (in a similar fashion to
170 * gpiod_get_index() for example) it also holds a reference to the GPIO device.
172 struct gpio_desc *acpi_get_and_request_gpiod(char *path, unsigned int pin, char *label)
174 struct gpio_desc *gpio;
177 gpio = acpi_get_gpiod(path, pin);
181 ret = gpiod_request(gpio, label);
187 EXPORT_SYMBOL_GPL(acpi_get_and_request_gpiod);
189 static irqreturn_t acpi_gpio_irq_handler(int irq, void *data)
191 struct acpi_gpio_event *event = data;
193 acpi_evaluate_object(event->handle, NULL, NULL, NULL);
198 static irqreturn_t acpi_gpio_irq_handler_evt(int irq, void *data)
200 struct acpi_gpio_event *event = data;
202 acpi_execute_simple_method(event->handle, NULL, event->pin);
207 static void acpi_gpio_chip_dh(acpi_handle handle, void *data)
209 /* The address of this function is used as a key. */
212 bool acpi_gpio_get_irq_resource(struct acpi_resource *ares,
213 struct acpi_resource_gpio **agpio)
215 struct acpi_resource_gpio *gpio;
217 if (ares->type != ACPI_RESOURCE_TYPE_GPIO)
220 gpio = &ares->data.gpio;
221 if (gpio->connection_type != ACPI_RESOURCE_GPIO_TYPE_INT)
227 EXPORT_SYMBOL_GPL(acpi_gpio_get_irq_resource);
230 * acpi_gpio_get_io_resource - Fetch details of an ACPI resource if it is a GPIO
231 * I/O resource or return False if not.
232 * @ares: Pointer to the ACPI resource to fetch
233 * @agpio: Pointer to a &struct acpi_resource_gpio to store the output pointer
235 bool acpi_gpio_get_io_resource(struct acpi_resource *ares,
236 struct acpi_resource_gpio **agpio)
238 struct acpi_resource_gpio *gpio;
240 if (ares->type != ACPI_RESOURCE_TYPE_GPIO)
243 gpio = &ares->data.gpio;
244 if (gpio->connection_type != ACPI_RESOURCE_GPIO_TYPE_IO)
250 EXPORT_SYMBOL_GPL(acpi_gpio_get_io_resource);
252 static void acpi_gpiochip_request_irq(struct acpi_gpio_chip *acpi_gpio,
253 struct acpi_gpio_event *event)
255 struct device *parent = acpi_gpio->chip->parent;
258 ret = request_threaded_irq(event->irq, NULL, event->handler,
259 event->irqflags | IRQF_ONESHOT, "ACPI:Event", event);
261 dev_err(parent, "Failed to setup interrupt handler for %d\n", event->irq);
265 if (event->irq_is_wake)
266 enable_irq_wake(event->irq);
268 event->irq_requested = true;
270 /* Make sure we trigger the initial state of edge-triggered IRQs */
271 if (run_edge_events_on_boot &&
272 (event->irqflags & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING))) {
273 value = gpiod_get_raw_value_cansleep(event->desc);
274 if (((event->irqflags & IRQF_TRIGGER_RISING) && value == 1) ||
275 ((event->irqflags & IRQF_TRIGGER_FALLING) && value == 0))
276 event->handler(event->irq, event);
280 static void acpi_gpiochip_request_irqs(struct acpi_gpio_chip *acpi_gpio)
282 struct acpi_gpio_event *event;
284 list_for_each_entry(event, &acpi_gpio->events, node)
285 acpi_gpiochip_request_irq(acpi_gpio, event);
288 static enum gpiod_flags
289 acpi_gpio_to_gpiod_flags(const struct acpi_resource_gpio *agpio, int polarity)
291 /* GpioInt() implies input configuration */
292 if (agpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT)
295 switch (agpio->io_restriction) {
296 case ACPI_IO_RESTRICT_INPUT:
298 case ACPI_IO_RESTRICT_OUTPUT:
300 * ACPI GPIO resources don't contain an initial value for the
301 * GPIO. Therefore we deduce that value from the pull field
302 * and the polarity instead. If the pin is pulled up we assume
303 * default to be high, if it is pulled down we assume default
304 * to be low, otherwise we leave pin untouched. For active low
305 * polarity values will be switched. See also
306 * Documentation/firmware-guide/acpi/gpio-properties.rst.
308 switch (agpio->pin_config) {
309 case ACPI_PIN_CONFIG_PULLUP:
310 return polarity == GPIO_ACTIVE_LOW ? GPIOD_OUT_LOW : GPIOD_OUT_HIGH;
311 case ACPI_PIN_CONFIG_PULLDOWN:
312 return polarity == GPIO_ACTIVE_LOW ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW;
322 * Assume that the BIOS has configured the direction and pull
328 static struct gpio_desc *acpi_request_own_gpiod(struct gpio_chip *chip,
329 struct acpi_resource_gpio *agpio,
333 int polarity = GPIO_ACTIVE_HIGH;
334 enum gpiod_flags flags = acpi_gpio_to_gpiod_flags(agpio, polarity);
335 unsigned int pin = agpio->pin_table[index];
336 struct gpio_desc *desc;
339 desc = gpiochip_request_own_desc(chip, pin, label, polarity, flags);
343 /* ACPI uses hundredths of milliseconds units */
344 ret = gpio_set_debounce_timeout(desc, agpio->debounce_timeout * 10);
346 dev_warn(chip->parent,
347 "Failed to set debounce-timeout for pin 0x%04X, err %d\n",
353 static bool acpi_gpio_in_ignore_list(const char *ignore_list, const char *controller_in,
356 const char *controller, *pin_str;
361 controller = ignore_list;
363 pin_str = strchr(controller, '@');
367 len = pin_str - controller;
368 if (len == strlen(controller_in) &&
369 strncmp(controller, controller_in, len) == 0) {
370 pin = simple_strtoul(pin_str + 1, &endp, 10);
371 if (*endp != 0 && *endp != ',')
378 controller = strchr(controller, ',');
385 pr_err_once("Error: Invalid value for gpiolib_acpi.ignore_...: %s\n", ignore_list);
389 static bool acpi_gpio_irq_is_wake(struct device *parent,
390 const struct acpi_resource_gpio *agpio)
392 unsigned int pin = agpio->pin_table[0];
394 if (agpio->wake_capable != ACPI_WAKE_CAPABLE)
397 if (acpi_gpio_in_ignore_list(ignore_wake, dev_name(parent), pin)) {
398 dev_info(parent, "Ignoring wakeup on pin %u\n", pin);
405 /* Always returns AE_OK so that we keep looping over the resources */
406 static acpi_status acpi_gpiochip_alloc_event(struct acpi_resource *ares,
409 struct acpi_gpio_chip *acpi_gpio = context;
410 struct gpio_chip *chip = acpi_gpio->chip;
411 struct acpi_resource_gpio *agpio;
412 acpi_handle handle, evt_handle;
413 struct acpi_gpio_event *event;
414 irq_handler_t handler = NULL;
415 struct gpio_desc *desc;
419 if (!acpi_gpio_get_irq_resource(ares, &agpio))
422 handle = ACPI_HANDLE(chip->parent);
423 pin = agpio->pin_table[0];
427 sprintf(ev_name, "_%c%02X",
428 agpio->triggering == ACPI_EDGE_SENSITIVE ? 'E' : 'L',
430 if (ACPI_SUCCESS(acpi_get_handle(handle, ev_name, &evt_handle)))
431 handler = acpi_gpio_irq_handler;
434 if (ACPI_SUCCESS(acpi_get_handle(handle, "_EVT", &evt_handle)))
435 handler = acpi_gpio_irq_handler_evt;
440 desc = acpi_request_own_gpiod(chip, agpio, 0, "ACPI:Event");
442 dev_err(chip->parent,
443 "Failed to request GPIO for pin 0x%04X, err %ld\n",
448 ret = gpiochip_lock_as_irq(chip, pin);
450 dev_err(chip->parent,
451 "Failed to lock GPIO pin 0x%04X as interrupt, err %d\n",
456 irq = gpiod_to_irq(desc);
458 dev_err(chip->parent,
459 "Failed to translate GPIO pin 0x%04X to IRQ, err %d\n",
461 goto fail_unlock_irq;
464 if (acpi_gpio_in_ignore_list(ignore_interrupt, dev_name(chip->parent), pin)) {
465 dev_info(chip->parent, "Ignoring interrupt on pin %u\n", pin);
469 event = kzalloc(sizeof(*event), GFP_KERNEL);
471 goto fail_unlock_irq;
473 event->irqflags = IRQF_ONESHOT;
474 if (agpio->triggering == ACPI_LEVEL_SENSITIVE) {
475 if (agpio->polarity == ACPI_ACTIVE_HIGH)
476 event->irqflags |= IRQF_TRIGGER_HIGH;
478 event->irqflags |= IRQF_TRIGGER_LOW;
480 switch (agpio->polarity) {
481 case ACPI_ACTIVE_HIGH:
482 event->irqflags |= IRQF_TRIGGER_RISING;
484 case ACPI_ACTIVE_LOW:
485 event->irqflags |= IRQF_TRIGGER_FALLING;
488 event->irqflags |= IRQF_TRIGGER_RISING |
489 IRQF_TRIGGER_FALLING;
494 event->handle = evt_handle;
495 event->handler = handler;
497 event->irq_is_wake = acpi_gpio_irq_is_wake(chip->parent, agpio);
501 list_add_tail(&event->node, &acpi_gpio->events);
506 gpiochip_unlock_as_irq(chip, pin);
508 gpiochip_free_own_desc(desc);
514 * acpi_gpiochip_request_interrupts() - Register isr for gpio chip ACPI events
517 * ACPI5 platforms can use GPIO signaled ACPI events. These GPIO interrupts are
518 * handled by ACPI event methods which need to be called from the GPIO
519 * chip's interrupt handler. acpi_gpiochip_request_interrupts() finds out which
520 * GPIO pins have ACPI event methods and assigns interrupt handlers that calls
521 * the ACPI event methods for those pins.
523 void acpi_gpiochip_request_interrupts(struct gpio_chip *chip)
525 struct acpi_gpio_chip *acpi_gpio;
530 if (!chip->parent || !chip->to_irq)
533 handle = ACPI_HANDLE(chip->parent);
537 status = acpi_get_data(handle, acpi_gpio_chip_dh, (void **)&acpi_gpio);
538 if (ACPI_FAILURE(status))
541 if (acpi_quirk_skip_gpio_event_handlers())
544 acpi_walk_resources(handle, METHOD_NAME__AEI,
545 acpi_gpiochip_alloc_event, acpi_gpio);
547 mutex_lock(&acpi_gpio_deferred_req_irqs_lock);
548 defer = !acpi_gpio_deferred_req_irqs_done;
550 list_add(&acpi_gpio->deferred_req_irqs_list_entry,
551 &acpi_gpio_deferred_req_irqs_list);
552 mutex_unlock(&acpi_gpio_deferred_req_irqs_lock);
557 acpi_gpiochip_request_irqs(acpi_gpio);
559 EXPORT_SYMBOL_GPL(acpi_gpiochip_request_interrupts);
562 * acpi_gpiochip_free_interrupts() - Free GPIO ACPI event interrupts.
565 * Free interrupts associated with GPIO ACPI event method for the given
568 void acpi_gpiochip_free_interrupts(struct gpio_chip *chip)
570 struct acpi_gpio_chip *acpi_gpio;
571 struct acpi_gpio_event *event, *ep;
575 if (!chip->parent || !chip->to_irq)
578 handle = ACPI_HANDLE(chip->parent);
582 status = acpi_get_data(handle, acpi_gpio_chip_dh, (void **)&acpi_gpio);
583 if (ACPI_FAILURE(status))
586 mutex_lock(&acpi_gpio_deferred_req_irqs_lock);
587 if (!list_empty(&acpi_gpio->deferred_req_irqs_list_entry))
588 list_del_init(&acpi_gpio->deferred_req_irqs_list_entry);
589 mutex_unlock(&acpi_gpio_deferred_req_irqs_lock);
591 list_for_each_entry_safe_reverse(event, ep, &acpi_gpio->events, node) {
592 if (event->irq_requested) {
593 if (event->irq_is_wake)
594 disable_irq_wake(event->irq);
596 free_irq(event->irq, event);
599 gpiochip_unlock_as_irq(chip, event->pin);
600 gpiochip_free_own_desc(event->desc);
601 list_del(&event->node);
605 EXPORT_SYMBOL_GPL(acpi_gpiochip_free_interrupts);
607 int acpi_dev_add_driver_gpios(struct acpi_device *adev,
608 const struct acpi_gpio_mapping *gpios)
611 adev->driver_gpios = gpios;
616 EXPORT_SYMBOL_GPL(acpi_dev_add_driver_gpios);
618 void acpi_dev_remove_driver_gpios(struct acpi_device *adev)
621 adev->driver_gpios = NULL;
623 EXPORT_SYMBOL_GPL(acpi_dev_remove_driver_gpios);
625 static void acpi_dev_release_driver_gpios(void *adev)
627 acpi_dev_remove_driver_gpios(adev);
630 int devm_acpi_dev_add_driver_gpios(struct device *dev,
631 const struct acpi_gpio_mapping *gpios)
633 struct acpi_device *adev = ACPI_COMPANION(dev);
636 ret = acpi_dev_add_driver_gpios(adev, gpios);
640 return devm_add_action_or_reset(dev, acpi_dev_release_driver_gpios, adev);
642 EXPORT_SYMBOL_GPL(devm_acpi_dev_add_driver_gpios);
644 static bool acpi_get_driver_gpio_data(struct acpi_device *adev,
645 const char *name, int index,
646 struct fwnode_reference_args *args,
647 unsigned int *quirks)
649 const struct acpi_gpio_mapping *gm;
651 if (!adev || !adev->driver_gpios)
654 for (gm = adev->driver_gpios; gm->name; gm++)
655 if (!strcmp(name, gm->name) && gm->data && index < gm->size) {
656 const struct acpi_gpio_params *par = gm->data + index;
658 args->fwnode = acpi_fwnode_handle(adev);
659 args->args[0] = par->crs_entry_index;
660 args->args[1] = par->line_index;
661 args->args[2] = par->active_low;
664 *quirks = gm->quirks;
672 __acpi_gpio_update_gpiod_flags(enum gpiod_flags *flags, enum gpiod_flags update)
674 const enum gpiod_flags mask =
675 GPIOD_FLAGS_BIT_DIR_SET | GPIOD_FLAGS_BIT_DIR_OUT |
676 GPIOD_FLAGS_BIT_DIR_VAL;
680 * Check if the BIOS has IoRestriction with explicitly set direction
681 * and update @flags accordingly. Otherwise use whatever caller asked
684 if (update & GPIOD_FLAGS_BIT_DIR_SET) {
685 enum gpiod_flags diff = *flags ^ update;
688 * Check if caller supplied incompatible GPIO initialization
691 * Return %-EINVAL to notify that firmware has different
692 * settings and we are going to use them.
694 if (((*flags & GPIOD_FLAGS_BIT_DIR_SET) && (diff & GPIOD_FLAGS_BIT_DIR_OUT)) ||
695 ((*flags & GPIOD_FLAGS_BIT_DIR_OUT) && (diff & GPIOD_FLAGS_BIT_DIR_VAL)))
697 *flags = (*flags & ~mask) | (update & mask);
702 static int acpi_gpio_update_gpiod_flags(enum gpiod_flags *flags,
703 struct acpi_gpio_info *info)
705 struct device *dev = &info->adev->dev;
706 enum gpiod_flags old = *flags;
709 ret = __acpi_gpio_update_gpiod_flags(&old, info->flags);
710 if (info->quirks & ACPI_GPIO_QUIRK_NO_IO_RESTRICTION) {
712 dev_warn(dev, FW_BUG "GPIO not in correct mode, fixing\n");
715 dev_dbg(dev, "Override GPIO initialization flags\n");
722 static int acpi_gpio_update_gpiod_lookup_flags(unsigned long *lookupflags,
723 struct acpi_gpio_info *info)
725 switch (info->pin_config) {
726 case ACPI_PIN_CONFIG_PULLUP:
727 *lookupflags |= GPIO_PULL_UP;
729 case ACPI_PIN_CONFIG_PULLDOWN:
730 *lookupflags |= GPIO_PULL_DOWN;
732 case ACPI_PIN_CONFIG_NOPULL:
733 *lookupflags |= GPIO_PULL_DISABLE;
739 if (info->polarity == GPIO_ACTIVE_LOW)
740 *lookupflags |= GPIO_ACTIVE_LOW;
745 struct acpi_gpio_lookup {
746 struct acpi_gpio_info info;
750 struct gpio_desc *desc;
754 static int acpi_populate_gpio_lookup(struct acpi_resource *ares, void *data)
756 struct acpi_gpio_lookup *lookup = data;
758 if (ares->type != ACPI_RESOURCE_TYPE_GPIO)
762 const struct acpi_resource_gpio *agpio = &ares->data.gpio;
763 bool gpioint = agpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT;
764 struct gpio_desc *desc;
767 if (lookup->info.quirks & ACPI_GPIO_QUIRK_ONLY_GPIOIO && gpioint)
770 if (lookup->n++ != lookup->index)
773 pin_index = lookup->pin_index;
774 if (pin_index >= agpio->pin_table_length)
777 if (lookup->info.quirks & ACPI_GPIO_QUIRK_ABSOLUTE_NUMBER)
778 desc = gpio_to_desc(agpio->pin_table[pin_index]);
780 desc = acpi_get_gpiod(agpio->resource_source.string_ptr,
781 agpio->pin_table[pin_index]);
783 lookup->info.pin_config = agpio->pin_config;
784 lookup->info.debounce = agpio->debounce_timeout;
785 lookup->info.gpioint = gpioint;
786 lookup->info.wake_capable = acpi_gpio_irq_is_wake(&lookup->info.adev->dev, agpio);
789 * Polarity and triggering are only specified for GpioInt
791 * Note: we expect here:
792 * - ACPI_ACTIVE_LOW == GPIO_ACTIVE_LOW
793 * - ACPI_ACTIVE_HIGH == GPIO_ACTIVE_HIGH
795 if (lookup->info.gpioint) {
796 lookup->info.polarity = agpio->polarity;
797 lookup->info.triggering = agpio->triggering;
799 lookup->info.polarity = lookup->active_low;
802 lookup->info.flags = acpi_gpio_to_gpiod_flags(agpio, lookup->info.polarity);
808 static int acpi_gpio_resource_lookup(struct acpi_gpio_lookup *lookup,
809 struct acpi_gpio_info *info)
811 struct acpi_device *adev = lookup->info.adev;
812 struct list_head res_list;
815 INIT_LIST_HEAD(&res_list);
817 ret = acpi_dev_get_resources(adev, &res_list,
818 acpi_populate_gpio_lookup,
823 acpi_dev_free_resource_list(&res_list);
829 *info = lookup->info;
833 static int acpi_gpio_property_lookup(struct fwnode_handle *fwnode,
834 const char *propname, int index,
835 struct acpi_gpio_lookup *lookup)
837 struct fwnode_reference_args args;
838 unsigned int quirks = 0;
841 memset(&args, 0, sizeof(args));
842 ret = __acpi_node_get_property_reference(fwnode, propname, index, 3,
845 struct acpi_device *adev;
847 adev = to_acpi_device_node(fwnode);
848 if (!acpi_get_driver_gpio_data(adev, propname, index, &args, &quirks))
852 * The property was found and resolved, so need to lookup the GPIO based
855 if (!to_acpi_device_node(args.fwnode))
860 lookup->index = args.args[0];
861 lookup->pin_index = args.args[1];
862 lookup->active_low = !!args.args[2];
864 lookup->info.adev = to_acpi_device_node(args.fwnode);
865 lookup->info.quirks = quirks;
871 * acpi_get_gpiod_by_index() - get a GPIO descriptor from device resources
872 * @adev: pointer to a ACPI device to get GPIO from
873 * @propname: Property name of the GPIO (optional)
874 * @index: index of GpioIo/GpioInt resource (starting from %0)
875 * @info: info pointer to fill in (optional)
877 * Function goes through ACPI resources for @adev and based on @index looks
878 * up a GpioIo/GpioInt resource, translates it to the Linux GPIO descriptor,
879 * and returns it. @index matches GpioIo/GpioInt resources only so if there
880 * are total %3 GPIO resources, the index goes from %0 to %2.
882 * If @propname is specified the GPIO is looked using device property. In
883 * that case @index is used to select the GPIO entry in the property value
884 * (in case of multiple).
886 * If the GPIO cannot be translated or there is an error, an ERR_PTR is
889 * Note: if the GPIO resource has multiple entries in the pin list, this
890 * function only returns the first.
892 static struct gpio_desc *acpi_get_gpiod_by_index(struct acpi_device *adev,
893 const char *propname,
895 struct acpi_gpio_info *info)
897 struct acpi_gpio_lookup lookup;
901 return ERR_PTR(-ENODEV);
903 memset(&lookup, 0, sizeof(lookup));
904 lookup.index = index;
907 dev_dbg(&adev->dev, "GPIO: looking up %s\n", propname);
909 ret = acpi_gpio_property_lookup(acpi_fwnode_handle(adev),
910 propname, index, &lookup);
914 dev_dbg(&adev->dev, "GPIO: _DSD returned %s %d %u %u\n",
915 dev_name(&lookup.info.adev->dev), lookup.index,
916 lookup.pin_index, lookup.active_low);
918 dev_dbg(&adev->dev, "GPIO: looking up %d in _CRS\n", index);
919 lookup.info.adev = adev;
922 ret = acpi_gpio_resource_lookup(&lookup, info);
923 return ret ? ERR_PTR(ret) : lookup.desc;
927 * acpi_get_gpiod_from_data() - get a GPIO descriptor from ACPI data node
928 * @fwnode: pointer to an ACPI firmware node to get the GPIO information from
929 * @propname: Property name of the GPIO
930 * @index: index of GpioIo/GpioInt resource (starting from %0)
931 * @info: info pointer to fill in (optional)
933 * This function uses the property-based GPIO lookup to get to the GPIO
934 * resource with the relevant information from a data-only ACPI firmware node
935 * and uses that to obtain the GPIO descriptor to return.
937 * If the GPIO cannot be translated or there is an error an ERR_PTR is
940 static struct gpio_desc *acpi_get_gpiod_from_data(struct fwnode_handle *fwnode,
941 const char *propname,
943 struct acpi_gpio_info *info)
945 struct acpi_gpio_lookup lookup;
948 if (!is_acpi_data_node(fwnode))
949 return ERR_PTR(-ENODEV);
952 return ERR_PTR(-EINVAL);
954 lookup.index = index;
956 ret = acpi_gpio_property_lookup(fwnode, propname, index, &lookup);
960 ret = acpi_gpio_resource_lookup(&lookup, info);
961 return ret ? ERR_PTR(ret) : lookup.desc;
964 static bool acpi_can_fallback_to_crs(struct acpi_device *adev,
967 /* Never allow fallback if the device has properties */
968 if (acpi_dev_has_props(adev) || adev->driver_gpios)
971 return con_id == NULL;
974 struct gpio_desc *acpi_find_gpio(struct fwnode_handle *fwnode,
977 enum gpiod_flags *dflags,
978 unsigned long *lookupflags)
980 struct acpi_device *adev = to_acpi_device_node(fwnode);
981 struct acpi_gpio_info info;
982 struct gpio_desc *desc;
986 /* Try first from _DSD */
987 for (i = 0; i < ARRAY_SIZE(gpio_suffixes); i++) {
989 snprintf(propname, sizeof(propname), "%s-%s",
990 con_id, gpio_suffixes[i]);
992 snprintf(propname, sizeof(propname), "%s",
997 desc = acpi_get_gpiod_by_index(adev,
998 propname, idx, &info);
1000 desc = acpi_get_gpiod_from_data(fwnode,
1001 propname, idx, &info);
1004 if (PTR_ERR(desc) == -EPROBE_DEFER)
1005 return ERR_CAST(desc);
1008 /* Then from plain _CRS GPIOs */
1010 if (!adev || !acpi_can_fallback_to_crs(adev, con_id))
1011 return ERR_PTR(-ENOENT);
1013 desc = acpi_get_gpiod_by_index(adev, NULL, idx, &info);
1019 (*dflags == GPIOD_OUT_LOW || *dflags == GPIOD_OUT_HIGH)) {
1020 dev_dbg(&adev->dev, "refusing GpioInt() entry when doing GPIOD_OUT_* lookup\n");
1021 return ERR_PTR(-ENOENT);
1024 acpi_gpio_update_gpiod_flags(dflags, &info);
1025 acpi_gpio_update_gpiod_lookup_flags(lookupflags, &info);
1030 * acpi_dev_gpio_irq_wake_get_by() - Find GpioInt and translate it to Linux IRQ number
1031 * @adev: pointer to a ACPI device to get IRQ from
1032 * @name: optional name of GpioInt resource
1033 * @index: index of GpioInt resource (starting from %0)
1034 * @wake_capable: Set to true if the IRQ is wake capable
1036 * If the device has one or more GpioInt resources, this function can be
1037 * used to translate from the GPIO offset in the resource to the Linux IRQ
1040 * The function is idempotent, though each time it runs it will configure GPIO
1041 * pin direction according to the flags in GpioInt resource.
1043 * The function takes optional @name parameter. If the resource has a property
1044 * name, then only those will be taken into account.
1046 * The GPIO is considered wake capable if the GpioInt resource specifies
1047 * SharedAndWake or ExclusiveAndWake.
1049 * Return: Linux IRQ number (> %0) on success, negative errno on failure.
1051 int acpi_dev_gpio_irq_wake_get_by(struct acpi_device *adev, const char *name, int index,
1055 unsigned int irq_flags;
1058 for (i = 0, idx = 0; idx <= index; i++) {
1059 struct acpi_gpio_info info;
1060 struct gpio_desc *desc;
1062 desc = acpi_get_gpiod_by_index(adev, name, i, &info);
1064 /* Ignore -EPROBE_DEFER, it only matters if idx matches */
1065 if (IS_ERR(desc) && PTR_ERR(desc) != -EPROBE_DEFER)
1066 return PTR_ERR(desc);
1068 if (info.gpioint && idx++ == index) {
1069 unsigned long lflags = GPIO_LOOKUP_FLAGS_DEFAULT;
1070 enum gpiod_flags dflags = GPIOD_ASIS;
1075 return PTR_ERR(desc);
1077 irq = gpiod_to_irq(desc);
1081 acpi_gpio_update_gpiod_flags(&dflags, &info);
1082 acpi_gpio_update_gpiod_lookup_flags(&lflags, &info);
1084 snprintf(label, sizeof(label), "GpioInt() %d", index);
1085 ret = gpiod_configure_flags(desc, label, lflags, dflags);
1089 /* ACPI uses hundredths of milliseconds units */
1090 ret = gpio_set_debounce_timeout(desc, info.debounce * 10);
1094 irq_flags = acpi_dev_get_irq_type(info.triggering,
1098 * If the IRQ is not already in use then set type
1099 * if specified and different than the current one.
1101 if (can_request_irq(irq, irq_flags)) {
1102 if (irq_flags != IRQ_TYPE_NONE &&
1103 irq_flags != irq_get_trigger_type(irq))
1104 irq_set_irq_type(irq, irq_flags);
1106 dev_dbg(&adev->dev, "IRQ %d already in use\n", irq);
1109 /* avoid suspend issues with GPIOs when systems are using S3 */
1110 if (wake_capable && acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0)
1111 *wake_capable = info.wake_capable;
1119 EXPORT_SYMBOL_GPL(acpi_dev_gpio_irq_wake_get_by);
1122 acpi_gpio_adr_space_handler(u32 function, acpi_physical_address address,
1123 u32 bits, u64 *value, void *handler_context,
1124 void *region_context)
1126 struct acpi_gpio_chip *achip = region_context;
1127 struct gpio_chip *chip = achip->chip;
1128 struct acpi_resource_gpio *agpio;
1129 struct acpi_resource *ares;
1130 u16 pin_index = address;
1135 status = acpi_buffer_to_resource(achip->conn_info.connection,
1136 achip->conn_info.length, &ares);
1137 if (ACPI_FAILURE(status))
1140 if (WARN_ON(ares->type != ACPI_RESOURCE_TYPE_GPIO)) {
1142 return AE_BAD_PARAMETER;
1145 agpio = &ares->data.gpio;
1147 if (WARN_ON(agpio->io_restriction == ACPI_IO_RESTRICT_INPUT &&
1148 function == ACPI_WRITE)) {
1150 return AE_BAD_PARAMETER;
1153 length = min_t(u16, agpio->pin_table_length, pin_index + bits);
1154 for (i = pin_index; i < length; ++i) {
1155 unsigned int pin = agpio->pin_table[i];
1156 struct acpi_gpio_connection *conn;
1157 struct gpio_desc *desc;
1160 mutex_lock(&achip->conn_lock);
1163 list_for_each_entry(conn, &achip->conns, node) {
1164 if (conn->pin == pin) {
1172 * The same GPIO can be shared between operation region and
1173 * event but only if the access here is ACPI_READ. In that
1174 * case we "borrow" the event GPIO instead.
1176 if (!found && agpio->shareable == ACPI_SHARED &&
1177 function == ACPI_READ) {
1178 struct acpi_gpio_event *event;
1180 list_for_each_entry(event, &achip->events, node) {
1181 if (event->pin == pin) {
1190 desc = acpi_request_own_gpiod(chip, agpio, i, "ACPI:OpRegion");
1192 mutex_unlock(&achip->conn_lock);
1197 conn = kzalloc(sizeof(*conn), GFP_KERNEL);
1199 gpiochip_free_own_desc(desc);
1200 mutex_unlock(&achip->conn_lock);
1201 status = AE_NO_MEMORY;
1207 list_add_tail(&conn->node, &achip->conns);
1210 mutex_unlock(&achip->conn_lock);
1212 if (function == ACPI_WRITE)
1213 gpiod_set_raw_value_cansleep(desc, !!(*value & BIT(i)));
1215 *value |= (u64)gpiod_get_raw_value_cansleep(desc) << i;
1223 static void acpi_gpiochip_request_regions(struct acpi_gpio_chip *achip)
1225 struct gpio_chip *chip = achip->chip;
1226 acpi_handle handle = ACPI_HANDLE(chip->parent);
1229 INIT_LIST_HEAD(&achip->conns);
1230 mutex_init(&achip->conn_lock);
1231 status = acpi_install_address_space_handler(handle, ACPI_ADR_SPACE_GPIO,
1232 acpi_gpio_adr_space_handler,
1234 if (ACPI_FAILURE(status))
1235 dev_err(chip->parent,
1236 "Failed to install GPIO OpRegion handler\n");
1239 static void acpi_gpiochip_free_regions(struct acpi_gpio_chip *achip)
1241 struct gpio_chip *chip = achip->chip;
1242 acpi_handle handle = ACPI_HANDLE(chip->parent);
1243 struct acpi_gpio_connection *conn, *tmp;
1246 status = acpi_remove_address_space_handler(handle, ACPI_ADR_SPACE_GPIO,
1247 acpi_gpio_adr_space_handler);
1248 if (ACPI_FAILURE(status)) {
1249 dev_err(chip->parent,
1250 "Failed to remove GPIO OpRegion handler\n");
1254 list_for_each_entry_safe_reverse(conn, tmp, &achip->conns, node) {
1255 gpiochip_free_own_desc(conn->desc);
1256 list_del(&conn->node);
1261 static struct gpio_desc *
1262 acpi_gpiochip_parse_own_gpio(struct acpi_gpio_chip *achip,
1263 struct fwnode_handle *fwnode,
1265 unsigned long *lflags,
1266 enum gpiod_flags *dflags)
1268 struct gpio_chip *chip = achip->chip;
1269 struct gpio_desc *desc;
1273 *lflags = GPIO_LOOKUP_FLAGS_DEFAULT;
1274 *dflags = GPIOD_ASIS;
1277 ret = fwnode_property_read_u32_array(fwnode, "gpios", gpios,
1280 return ERR_PTR(ret);
1282 desc = gpiochip_get_desc(chip, gpios[0]);
1287 *lflags |= GPIO_ACTIVE_LOW;
1289 if (fwnode_property_present(fwnode, "input"))
1290 *dflags |= GPIOD_IN;
1291 else if (fwnode_property_present(fwnode, "output-low"))
1292 *dflags |= GPIOD_OUT_LOW;
1293 else if (fwnode_property_present(fwnode, "output-high"))
1294 *dflags |= GPIOD_OUT_HIGH;
1296 return ERR_PTR(-EINVAL);
1298 fwnode_property_read_string(fwnode, "line-name", name);
1303 static void acpi_gpiochip_scan_gpios(struct acpi_gpio_chip *achip)
1305 struct gpio_chip *chip = achip->chip;
1306 struct fwnode_handle *fwnode;
1308 device_for_each_child_node(chip->parent, fwnode) {
1309 unsigned long lflags;
1310 enum gpiod_flags dflags;
1311 struct gpio_desc *desc;
1315 if (!fwnode_property_present(fwnode, "gpio-hog"))
1318 desc = acpi_gpiochip_parse_own_gpio(achip, fwnode, &name,
1323 ret = gpiod_hog(desc, name, lflags, dflags);
1325 dev_err(chip->parent, "Failed to hog GPIO\n");
1326 fwnode_handle_put(fwnode);
1332 void acpi_gpiochip_add(struct gpio_chip *chip)
1334 struct acpi_gpio_chip *acpi_gpio;
1335 struct acpi_device *adev;
1338 if (!chip || !chip->parent)
1341 adev = ACPI_COMPANION(chip->parent);
1345 acpi_gpio = kzalloc(sizeof(*acpi_gpio), GFP_KERNEL);
1347 dev_err(chip->parent,
1348 "Failed to allocate memory for ACPI GPIO chip\n");
1352 acpi_gpio->chip = chip;
1353 INIT_LIST_HEAD(&acpi_gpio->events);
1354 INIT_LIST_HEAD(&acpi_gpio->deferred_req_irqs_list_entry);
1356 status = acpi_attach_data(adev->handle, acpi_gpio_chip_dh, acpi_gpio);
1357 if (ACPI_FAILURE(status)) {
1358 dev_err(chip->parent, "Failed to attach ACPI GPIO chip\n");
1363 acpi_gpiochip_request_regions(acpi_gpio);
1364 acpi_gpiochip_scan_gpios(acpi_gpio);
1365 acpi_dev_clear_dependencies(adev);
1368 void acpi_gpiochip_remove(struct gpio_chip *chip)
1370 struct acpi_gpio_chip *acpi_gpio;
1374 if (!chip || !chip->parent)
1377 handle = ACPI_HANDLE(chip->parent);
1381 status = acpi_get_data(handle, acpi_gpio_chip_dh, (void **)&acpi_gpio);
1382 if (ACPI_FAILURE(status)) {
1383 dev_warn(chip->parent, "Failed to retrieve ACPI GPIO chip\n");
1387 acpi_gpiochip_free_regions(acpi_gpio);
1389 acpi_detach_data(handle, acpi_gpio_chip_dh);
1393 static int acpi_gpio_package_count(const union acpi_object *obj)
1395 const union acpi_object *element = obj->package.elements;
1396 const union acpi_object *end = element + obj->package.count;
1397 unsigned int count = 0;
1399 while (element < end) {
1400 switch (element->type) {
1401 case ACPI_TYPE_LOCAL_REFERENCE:
1404 case ACPI_TYPE_INTEGER:
1417 static int acpi_find_gpio_count(struct acpi_resource *ares, void *data)
1419 unsigned int *count = data;
1421 if (ares->type == ACPI_RESOURCE_TYPE_GPIO)
1422 *count += ares->data.gpio.pin_table_length;
1428 * acpi_gpio_count - count the GPIOs associated with a device / function
1429 * @dev: GPIO consumer, can be %NULL for system-global GPIOs
1430 * @con_id: function within the GPIO consumer
1433 * The number of GPIOs associated with a device / function or %-ENOENT,
1434 * if no GPIO has been assigned to the requested function.
1436 int acpi_gpio_count(struct device *dev, const char *con_id)
1438 struct acpi_device *adev = ACPI_COMPANION(dev);
1439 const union acpi_object *obj;
1440 const struct acpi_gpio_mapping *gm;
1441 int count = -ENOENT;
1446 /* Try first from _DSD */
1447 for (i = 0; i < ARRAY_SIZE(gpio_suffixes); i++) {
1449 snprintf(propname, sizeof(propname), "%s-%s",
1450 con_id, gpio_suffixes[i]);
1452 snprintf(propname, sizeof(propname), "%s",
1455 ret = acpi_dev_get_property(adev, propname, ACPI_TYPE_ANY,
1458 if (obj->type == ACPI_TYPE_LOCAL_REFERENCE)
1460 else if (obj->type == ACPI_TYPE_PACKAGE)
1461 count = acpi_gpio_package_count(obj);
1462 } else if (adev->driver_gpios) {
1463 for (gm = adev->driver_gpios; gm->name; gm++)
1464 if (strcmp(propname, gm->name) == 0) {
1473 /* Then from plain _CRS GPIOs */
1475 struct list_head resource_list;
1476 unsigned int crs_count = 0;
1478 if (!acpi_can_fallback_to_crs(adev, con_id))
1481 INIT_LIST_HEAD(&resource_list);
1482 acpi_dev_get_resources(adev, &resource_list,
1483 acpi_find_gpio_count, &crs_count);
1484 acpi_dev_free_resource_list(&resource_list);
1488 return count ? count : -ENOENT;
1491 /* Run deferred acpi_gpiochip_request_irqs() */
1492 static int __init acpi_gpio_handle_deferred_request_irqs(void)
1494 struct acpi_gpio_chip *acpi_gpio, *tmp;
1496 mutex_lock(&acpi_gpio_deferred_req_irqs_lock);
1497 list_for_each_entry_safe(acpi_gpio, tmp,
1498 &acpi_gpio_deferred_req_irqs_list,
1499 deferred_req_irqs_list_entry)
1500 acpi_gpiochip_request_irqs(acpi_gpio);
1502 acpi_gpio_deferred_req_irqs_done = true;
1503 mutex_unlock(&acpi_gpio_deferred_req_irqs_lock);
1507 /* We must use _sync so that this runs after the first deferred_probe run */
1508 late_initcall_sync(acpi_gpio_handle_deferred_request_irqs);
1510 static const struct dmi_system_id gpiolib_acpi_quirks[] __initconst = {
1513 * The Minix Neo Z83-4 has a micro-USB-B id-pin handler for
1514 * a non existing micro-USB-B connector which puts the HDMI
1515 * DDC pins in GPIO mode, breaking HDMI support.
1518 DMI_MATCH(DMI_SYS_VENDOR, "MINIX"),
1519 DMI_MATCH(DMI_PRODUCT_NAME, "Z83-4"),
1521 .driver_data = &(struct acpi_gpiolib_dmi_quirk) {
1522 .no_edge_events_on_boot = true,
1527 * The Terra Pad 1061 has a micro-USB-B id-pin handler, which
1528 * instead of controlling the actual micro-USB-B turns the 5V
1529 * boost for its USB-A connector off. The actual micro-USB-B
1530 * connector is wired for charging only.
1533 DMI_MATCH(DMI_SYS_VENDOR, "Wortmann_AG"),
1534 DMI_MATCH(DMI_PRODUCT_NAME, "TERRA_PAD_1061"),
1536 .driver_data = &(struct acpi_gpiolib_dmi_quirk) {
1537 .no_edge_events_on_boot = true,
1542 * The Dell Venue 10 Pro 5055, with Bay Trail SoC + TI PMIC uses an
1543 * external embedded-controller connected via I2C + an ACPI GPIO
1544 * event handler on INT33FFC:02 pin 12, causing spurious wakeups.
1547 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
1548 DMI_MATCH(DMI_PRODUCT_NAME, "Venue 10 Pro 5055"),
1550 .driver_data = &(struct acpi_gpiolib_dmi_quirk) {
1551 .ignore_wake = "INT33FC:02@12",
1556 * HP X2 10 models with Cherry Trail SoC + TI PMIC use an
1557 * external embedded-controller connected via I2C + an ACPI GPIO
1558 * event handler on INT33FF:01 pin 0, causing spurious wakeups.
1559 * When suspending by closing the LID, the power to the USB
1560 * keyboard is turned off, causing INT0002 ACPI events to
1561 * trigger once the XHCI controller notices the keyboard is
1562 * gone. So INT0002 events cause spurious wakeups too. Ignoring
1563 * EC wakes breaks wakeup when opening the lid, the user needs
1564 * to press the power-button to wakeup the system. The
1565 * alternative is suspend simply not working, which is worse.
1568 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
1569 DMI_MATCH(DMI_PRODUCT_NAME, "HP x2 Detachable 10-p0XX"),
1571 .driver_data = &(struct acpi_gpiolib_dmi_quirk) {
1572 .ignore_wake = "INT33FF:01@0,INT0002:00@2",
1577 * HP X2 10 models with Bay Trail SoC + AXP288 PMIC use an
1578 * external embedded-controller connected via I2C + an ACPI GPIO
1579 * event handler on INT33FC:02 pin 28, causing spurious wakeups.
1582 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1583 DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion x2 Detachable"),
1584 DMI_MATCH(DMI_BOARD_NAME, "815D"),
1586 .driver_data = &(struct acpi_gpiolib_dmi_quirk) {
1587 .ignore_wake = "INT33FC:02@28",
1592 * HP X2 10 models with Cherry Trail SoC + AXP288 PMIC use an
1593 * external embedded-controller connected via I2C + an ACPI GPIO
1594 * event handler on INT33FF:01 pin 0, causing spurious wakeups.
1597 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
1598 DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion x2 Detachable"),
1599 DMI_MATCH(DMI_BOARD_NAME, "813E"),
1601 .driver_data = &(struct acpi_gpiolib_dmi_quirk) {
1602 .ignore_wake = "INT33FF:01@0",
1607 * Interrupt storm caused from edge triggered floating pin
1608 * Found in BIOS UX325UAZ.300
1609 * https://bugzilla.kernel.org/show_bug.cgi?id=216208
1612 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
1613 DMI_MATCH(DMI_PRODUCT_NAME, "ZenBook UX325UAZ_UM325UAZ"),
1615 .driver_data = &(struct acpi_gpiolib_dmi_quirk) {
1616 .ignore_interrupt = "AMDI0030:00@18",
1621 * Spurious wakeups from TP_ATTN# pin
1622 * Found in BIOS 1.7.8
1623 * https://gitlab.freedesktop.org/drm/amd/-/issues/1722#note_1720627
1626 DMI_MATCH(DMI_BOARD_NAME, "NL5xNU"),
1628 .driver_data = &(struct acpi_gpiolib_dmi_quirk) {
1629 .ignore_wake = "ELAN0415:00@9",
1634 * Spurious wakeups from TP_ATTN# pin
1635 * Found in BIOS 1.7.8
1636 * https://gitlab.freedesktop.org/drm/amd/-/issues/1722#note_1720627
1639 DMI_MATCH(DMI_BOARD_NAME, "NL5xRU"),
1641 .driver_data = &(struct acpi_gpiolib_dmi_quirk) {
1642 .ignore_wake = "ELAN0415:00@9",
1647 * Spurious wakeups from TP_ATTN# pin
1648 * Found in BIOS 1.7.7
1651 DMI_MATCH(DMI_BOARD_NAME, "NH5xAx"),
1653 .driver_data = &(struct acpi_gpiolib_dmi_quirk) {
1654 .ignore_wake = "SYNA1202:00@16",
1657 {} /* Terminating entry */
1660 static int __init acpi_gpio_setup_params(void)
1662 const struct acpi_gpiolib_dmi_quirk *quirk = NULL;
1663 const struct dmi_system_id *id;
1665 id = dmi_first_match(gpiolib_acpi_quirks);
1667 quirk = id->driver_data;
1669 if (run_edge_events_on_boot < 0) {
1670 if (quirk && quirk->no_edge_events_on_boot)
1671 run_edge_events_on_boot = 0;
1673 run_edge_events_on_boot = 1;
1676 if (ignore_wake == NULL && quirk && quirk->ignore_wake)
1677 ignore_wake = quirk->ignore_wake;
1679 if (ignore_interrupt == NULL && quirk && quirk->ignore_interrupt)
1680 ignore_interrupt = quirk->ignore_interrupt;
1685 /* Directly after dmi_setup() which runs as core_initcall() */
1686 postcore_initcall(acpi_gpio_setup_params);