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, const void *data)
131 /* First check the actual GPIO device */
132 if (device_match_acpi_handle(&gc->gpiodev->dev, data))
136 * When the ACPI device is artificially split to the banks of GPIOs,
137 * where each of them is represented by a separate GPIO device,
138 * the firmware node of the physical device may not be shared among
139 * the banks as they may require different values for the same property,
140 * e.g., number of GPIOs in a certain bank. In such case the ACPI handle
141 * of a GPIO device is NULL and can not be used. Hence we have to check
142 * the parent device to be sure that there is no match before bailing
146 return device_match_acpi_handle(gc->parent, data);
152 * acpi_get_gpiod() - Translate ACPI GPIO pin to GPIO descriptor usable with GPIO API
153 * @path: ACPI GPIO controller full path name, (e.g. "\\_SB.GPO1")
154 * @pin: ACPI GPIO pin number (0-based, controller-relative)
156 * Return: GPIO descriptor to use with Linux generic GPIO API, or ERR_PTR
157 * error value. Specifically returns %-EPROBE_DEFER if the referenced GPIO
158 * controller does not have GPIO chip registered at the moment. This is to
159 * support probe deferral.
161 static struct gpio_desc *acpi_get_gpiod(char *path, unsigned int pin)
166 status = acpi_get_handle(NULL, path, &handle);
167 if (ACPI_FAILURE(status))
168 return ERR_PTR(-ENODEV);
170 struct gpio_device *gdev __free(gpio_device_put) =
171 gpio_device_find(handle, acpi_gpiochip_find);
173 return ERR_PTR(-EPROBE_DEFER);
176 * FIXME: keep track of the reference to the GPIO device somehow
177 * instead of putting it here.
179 return gpio_device_get_desc(gdev, pin);
182 static irqreturn_t acpi_gpio_irq_handler(int irq, void *data)
184 struct acpi_gpio_event *event = data;
186 acpi_evaluate_object(event->handle, NULL, NULL, NULL);
191 static irqreturn_t acpi_gpio_irq_handler_evt(int irq, void *data)
193 struct acpi_gpio_event *event = data;
195 acpi_execute_simple_method(event->handle, NULL, event->pin);
200 static void acpi_gpio_chip_dh(acpi_handle handle, void *data)
202 /* The address of this function is used as a key. */
205 bool acpi_gpio_get_irq_resource(struct acpi_resource *ares,
206 struct acpi_resource_gpio **agpio)
208 struct acpi_resource_gpio *gpio;
210 if (ares->type != ACPI_RESOURCE_TYPE_GPIO)
213 gpio = &ares->data.gpio;
214 if (gpio->connection_type != ACPI_RESOURCE_GPIO_TYPE_INT)
220 EXPORT_SYMBOL_GPL(acpi_gpio_get_irq_resource);
223 * acpi_gpio_get_io_resource - Fetch details of an ACPI resource if it is a GPIO
224 * I/O resource or return False if not.
225 * @ares: Pointer to the ACPI resource to fetch
226 * @agpio: Pointer to a &struct acpi_resource_gpio to store the output pointer
228 bool acpi_gpio_get_io_resource(struct acpi_resource *ares,
229 struct acpi_resource_gpio **agpio)
231 struct acpi_resource_gpio *gpio;
233 if (ares->type != ACPI_RESOURCE_TYPE_GPIO)
236 gpio = &ares->data.gpio;
237 if (gpio->connection_type != ACPI_RESOURCE_GPIO_TYPE_IO)
243 EXPORT_SYMBOL_GPL(acpi_gpio_get_io_resource);
245 static void acpi_gpiochip_request_irq(struct acpi_gpio_chip *acpi_gpio,
246 struct acpi_gpio_event *event)
248 struct device *parent = acpi_gpio->chip->parent;
251 ret = request_threaded_irq(event->irq, NULL, event->handler,
252 event->irqflags | IRQF_ONESHOT, "ACPI:Event", event);
254 dev_err(parent, "Failed to setup interrupt handler for %d\n", event->irq);
258 if (event->irq_is_wake)
259 enable_irq_wake(event->irq);
261 event->irq_requested = true;
263 /* Make sure we trigger the initial state of edge-triggered IRQs */
264 if (run_edge_events_on_boot &&
265 (event->irqflags & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING))) {
266 value = gpiod_get_raw_value_cansleep(event->desc);
267 if (((event->irqflags & IRQF_TRIGGER_RISING) && value == 1) ||
268 ((event->irqflags & IRQF_TRIGGER_FALLING) && value == 0))
269 event->handler(event->irq, event);
273 static void acpi_gpiochip_request_irqs(struct acpi_gpio_chip *acpi_gpio)
275 struct acpi_gpio_event *event;
277 list_for_each_entry(event, &acpi_gpio->events, node)
278 acpi_gpiochip_request_irq(acpi_gpio, event);
281 static enum gpiod_flags
282 acpi_gpio_to_gpiod_flags(const struct acpi_resource_gpio *agpio, int polarity)
284 /* GpioInt() implies input configuration */
285 if (agpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT)
288 switch (agpio->io_restriction) {
289 case ACPI_IO_RESTRICT_INPUT:
291 case ACPI_IO_RESTRICT_OUTPUT:
293 * ACPI GPIO resources don't contain an initial value for the
294 * GPIO. Therefore we deduce that value from the pull field
295 * and the polarity instead. If the pin is pulled up we assume
296 * default to be high, if it is pulled down we assume default
297 * to be low, otherwise we leave pin untouched. For active low
298 * polarity values will be switched. See also
299 * Documentation/firmware-guide/acpi/gpio-properties.rst.
301 switch (agpio->pin_config) {
302 case ACPI_PIN_CONFIG_PULLUP:
303 return polarity == GPIO_ACTIVE_LOW ? GPIOD_OUT_LOW : GPIOD_OUT_HIGH;
304 case ACPI_PIN_CONFIG_PULLDOWN:
305 return polarity == GPIO_ACTIVE_LOW ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW;
315 * Assume that the BIOS has configured the direction and pull
321 static struct gpio_desc *acpi_request_own_gpiod(struct gpio_chip *chip,
322 struct acpi_resource_gpio *agpio,
326 int polarity = GPIO_ACTIVE_HIGH;
327 enum gpiod_flags flags = acpi_gpio_to_gpiod_flags(agpio, polarity);
328 unsigned int pin = agpio->pin_table[index];
329 struct gpio_desc *desc;
332 desc = gpiochip_request_own_desc(chip, pin, label, polarity, flags);
336 /* ACPI uses hundredths of milliseconds units */
337 ret = gpio_set_debounce_timeout(desc, agpio->debounce_timeout * 10);
339 dev_warn(chip->parent,
340 "Failed to set debounce-timeout for pin 0x%04X, err %d\n",
346 static bool acpi_gpio_in_ignore_list(const char *ignore_list, const char *controller_in,
349 const char *controller, *pin_str;
354 controller = ignore_list;
356 pin_str = strchr(controller, '@');
360 len = pin_str - controller;
361 if (len == strlen(controller_in) &&
362 strncmp(controller, controller_in, len) == 0) {
363 pin = simple_strtoul(pin_str + 1, &endp, 10);
364 if (*endp != 0 && *endp != ',')
371 controller = strchr(controller, ',');
378 pr_err_once("Error: Invalid value for gpiolib_acpi.ignore_...: %s\n", ignore_list);
382 static bool acpi_gpio_irq_is_wake(struct device *parent,
383 const struct acpi_resource_gpio *agpio)
385 unsigned int pin = agpio->pin_table[0];
387 if (agpio->wake_capable != ACPI_WAKE_CAPABLE)
390 if (acpi_gpio_in_ignore_list(ignore_wake, dev_name(parent), pin)) {
391 dev_info(parent, "Ignoring wakeup on pin %u\n", pin);
398 /* Always returns AE_OK so that we keep looping over the resources */
399 static acpi_status acpi_gpiochip_alloc_event(struct acpi_resource *ares,
402 struct acpi_gpio_chip *acpi_gpio = context;
403 struct gpio_chip *chip = acpi_gpio->chip;
404 struct acpi_resource_gpio *agpio;
405 acpi_handle handle, evt_handle;
406 struct acpi_gpio_event *event;
407 irq_handler_t handler = NULL;
408 struct gpio_desc *desc;
412 if (!acpi_gpio_get_irq_resource(ares, &agpio))
415 handle = ACPI_HANDLE(chip->parent);
416 pin = agpio->pin_table[0];
420 sprintf(ev_name, "_%c%02X",
421 agpio->triggering == ACPI_EDGE_SENSITIVE ? 'E' : 'L',
423 if (ACPI_SUCCESS(acpi_get_handle(handle, ev_name, &evt_handle)))
424 handler = acpi_gpio_irq_handler;
427 if (ACPI_SUCCESS(acpi_get_handle(handle, "_EVT", &evt_handle)))
428 handler = acpi_gpio_irq_handler_evt;
433 if (acpi_gpio_in_ignore_list(ignore_interrupt, dev_name(chip->parent), pin)) {
434 dev_info(chip->parent, "Ignoring interrupt on pin %u\n", pin);
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 event = kzalloc(sizeof(*event), GFP_KERNEL);
464 goto fail_unlock_irq;
466 event->irqflags = IRQF_ONESHOT;
467 if (agpio->triggering == ACPI_LEVEL_SENSITIVE) {
468 if (agpio->polarity == ACPI_ACTIVE_HIGH)
469 event->irqflags |= IRQF_TRIGGER_HIGH;
471 event->irqflags |= IRQF_TRIGGER_LOW;
473 switch (agpio->polarity) {
474 case ACPI_ACTIVE_HIGH:
475 event->irqflags |= IRQF_TRIGGER_RISING;
477 case ACPI_ACTIVE_LOW:
478 event->irqflags |= IRQF_TRIGGER_FALLING;
481 event->irqflags |= IRQF_TRIGGER_RISING |
482 IRQF_TRIGGER_FALLING;
487 event->handle = evt_handle;
488 event->handler = handler;
490 event->irq_is_wake = acpi_gpio_irq_is_wake(chip->parent, agpio);
494 list_add_tail(&event->node, &acpi_gpio->events);
499 gpiochip_unlock_as_irq(chip, pin);
501 gpiochip_free_own_desc(desc);
507 * acpi_gpiochip_request_interrupts() - Register isr for gpio chip ACPI events
510 * ACPI5 platforms can use GPIO signaled ACPI events. These GPIO interrupts are
511 * handled by ACPI event methods which need to be called from the GPIO
512 * chip's interrupt handler. acpi_gpiochip_request_interrupts() finds out which
513 * GPIO pins have ACPI event methods and assigns interrupt handlers that calls
514 * the ACPI event methods for those pins.
516 void acpi_gpiochip_request_interrupts(struct gpio_chip *chip)
518 struct acpi_gpio_chip *acpi_gpio;
523 if (!chip->parent || !chip->to_irq)
526 handle = ACPI_HANDLE(chip->parent);
530 status = acpi_get_data(handle, acpi_gpio_chip_dh, (void **)&acpi_gpio);
531 if (ACPI_FAILURE(status))
534 if (acpi_quirk_skip_gpio_event_handlers())
537 acpi_walk_resources(handle, METHOD_NAME__AEI,
538 acpi_gpiochip_alloc_event, acpi_gpio);
540 mutex_lock(&acpi_gpio_deferred_req_irqs_lock);
541 defer = !acpi_gpio_deferred_req_irqs_done;
543 list_add(&acpi_gpio->deferred_req_irqs_list_entry,
544 &acpi_gpio_deferred_req_irqs_list);
545 mutex_unlock(&acpi_gpio_deferred_req_irqs_lock);
550 acpi_gpiochip_request_irqs(acpi_gpio);
552 EXPORT_SYMBOL_GPL(acpi_gpiochip_request_interrupts);
555 * acpi_gpiochip_free_interrupts() - Free GPIO ACPI event interrupts.
558 * Free interrupts associated with GPIO ACPI event method for the given
561 void acpi_gpiochip_free_interrupts(struct gpio_chip *chip)
563 struct acpi_gpio_chip *acpi_gpio;
564 struct acpi_gpio_event *event, *ep;
568 if (!chip->parent || !chip->to_irq)
571 handle = ACPI_HANDLE(chip->parent);
575 status = acpi_get_data(handle, acpi_gpio_chip_dh, (void **)&acpi_gpio);
576 if (ACPI_FAILURE(status))
579 mutex_lock(&acpi_gpio_deferred_req_irqs_lock);
580 if (!list_empty(&acpi_gpio->deferred_req_irqs_list_entry))
581 list_del_init(&acpi_gpio->deferred_req_irqs_list_entry);
582 mutex_unlock(&acpi_gpio_deferred_req_irqs_lock);
584 list_for_each_entry_safe_reverse(event, ep, &acpi_gpio->events, node) {
585 if (event->irq_requested) {
586 if (event->irq_is_wake)
587 disable_irq_wake(event->irq);
589 free_irq(event->irq, event);
592 gpiochip_unlock_as_irq(chip, event->pin);
593 gpiochip_free_own_desc(event->desc);
594 list_del(&event->node);
598 EXPORT_SYMBOL_GPL(acpi_gpiochip_free_interrupts);
600 int acpi_dev_add_driver_gpios(struct acpi_device *adev,
601 const struct acpi_gpio_mapping *gpios)
604 adev->driver_gpios = gpios;
609 EXPORT_SYMBOL_GPL(acpi_dev_add_driver_gpios);
611 void acpi_dev_remove_driver_gpios(struct acpi_device *adev)
614 adev->driver_gpios = NULL;
616 EXPORT_SYMBOL_GPL(acpi_dev_remove_driver_gpios);
618 static void acpi_dev_release_driver_gpios(void *adev)
620 acpi_dev_remove_driver_gpios(adev);
623 int devm_acpi_dev_add_driver_gpios(struct device *dev,
624 const struct acpi_gpio_mapping *gpios)
626 struct acpi_device *adev = ACPI_COMPANION(dev);
629 ret = acpi_dev_add_driver_gpios(adev, gpios);
633 return devm_add_action_or_reset(dev, acpi_dev_release_driver_gpios, adev);
635 EXPORT_SYMBOL_GPL(devm_acpi_dev_add_driver_gpios);
637 static bool acpi_get_driver_gpio_data(struct acpi_device *adev,
638 const char *name, int index,
639 struct fwnode_reference_args *args,
640 unsigned int *quirks)
642 const struct acpi_gpio_mapping *gm;
644 if (!adev || !adev->driver_gpios)
647 for (gm = adev->driver_gpios; gm->name; gm++)
648 if (!strcmp(name, gm->name) && gm->data && index < gm->size) {
649 const struct acpi_gpio_params *par = gm->data + index;
651 args->fwnode = acpi_fwnode_handle(adev);
652 args->args[0] = par->crs_entry_index;
653 args->args[1] = par->line_index;
654 args->args[2] = par->active_low;
657 *quirks = gm->quirks;
665 __acpi_gpio_update_gpiod_flags(enum gpiod_flags *flags, enum gpiod_flags update)
667 const enum gpiod_flags mask =
668 GPIOD_FLAGS_BIT_DIR_SET | GPIOD_FLAGS_BIT_DIR_OUT |
669 GPIOD_FLAGS_BIT_DIR_VAL;
673 * Check if the BIOS has IoRestriction with explicitly set direction
674 * and update @flags accordingly. Otherwise use whatever caller asked
677 if (update & GPIOD_FLAGS_BIT_DIR_SET) {
678 enum gpiod_flags diff = *flags ^ update;
681 * Check if caller supplied incompatible GPIO initialization
684 * Return %-EINVAL to notify that firmware has different
685 * settings and we are going to use them.
687 if (((*flags & GPIOD_FLAGS_BIT_DIR_SET) && (diff & GPIOD_FLAGS_BIT_DIR_OUT)) ||
688 ((*flags & GPIOD_FLAGS_BIT_DIR_OUT) && (diff & GPIOD_FLAGS_BIT_DIR_VAL)))
690 *flags = (*flags & ~mask) | (update & mask);
695 static int acpi_gpio_update_gpiod_flags(enum gpiod_flags *flags,
696 struct acpi_gpio_info *info)
698 struct device *dev = &info->adev->dev;
699 enum gpiod_flags old = *flags;
702 ret = __acpi_gpio_update_gpiod_flags(&old, info->flags);
703 if (info->quirks & ACPI_GPIO_QUIRK_NO_IO_RESTRICTION) {
705 dev_warn(dev, FW_BUG "GPIO not in correct mode, fixing\n");
708 dev_dbg(dev, "Override GPIO initialization flags\n");
715 static int acpi_gpio_update_gpiod_lookup_flags(unsigned long *lookupflags,
716 struct acpi_gpio_info *info)
718 switch (info->pin_config) {
719 case ACPI_PIN_CONFIG_PULLUP:
720 *lookupflags |= GPIO_PULL_UP;
722 case ACPI_PIN_CONFIG_PULLDOWN:
723 *lookupflags |= GPIO_PULL_DOWN;
725 case ACPI_PIN_CONFIG_NOPULL:
726 *lookupflags |= GPIO_PULL_DISABLE;
732 if (info->polarity == GPIO_ACTIVE_LOW)
733 *lookupflags |= GPIO_ACTIVE_LOW;
738 struct acpi_gpio_lookup {
739 struct acpi_gpio_info info;
743 struct gpio_desc *desc;
747 static int acpi_populate_gpio_lookup(struct acpi_resource *ares, void *data)
749 struct acpi_gpio_lookup *lookup = data;
751 if (ares->type != ACPI_RESOURCE_TYPE_GPIO)
755 const struct acpi_resource_gpio *agpio = &ares->data.gpio;
756 bool gpioint = agpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT;
757 struct gpio_desc *desc;
760 if (lookup->info.quirks & ACPI_GPIO_QUIRK_ONLY_GPIOIO && gpioint)
763 if (lookup->n++ != lookup->index)
766 pin_index = lookup->pin_index;
767 if (pin_index >= agpio->pin_table_length)
770 if (lookup->info.quirks & ACPI_GPIO_QUIRK_ABSOLUTE_NUMBER)
771 desc = gpio_to_desc(agpio->pin_table[pin_index]);
773 desc = acpi_get_gpiod(agpio->resource_source.string_ptr,
774 agpio->pin_table[pin_index]);
776 lookup->info.pin_config = agpio->pin_config;
777 lookup->info.debounce = agpio->debounce_timeout;
778 lookup->info.gpioint = gpioint;
779 lookup->info.wake_capable = acpi_gpio_irq_is_wake(&lookup->info.adev->dev, agpio);
782 * Polarity and triggering are only specified for GpioInt
784 * Note: we expect here:
785 * - ACPI_ACTIVE_LOW == GPIO_ACTIVE_LOW
786 * - ACPI_ACTIVE_HIGH == GPIO_ACTIVE_HIGH
788 if (lookup->info.gpioint) {
789 lookup->info.polarity = agpio->polarity;
790 lookup->info.triggering = agpio->triggering;
792 lookup->info.polarity = lookup->active_low;
795 lookup->info.flags = acpi_gpio_to_gpiod_flags(agpio, lookup->info.polarity);
801 static int acpi_gpio_resource_lookup(struct acpi_gpio_lookup *lookup,
802 struct acpi_gpio_info *info)
804 struct acpi_device *adev = lookup->info.adev;
805 struct list_head res_list;
808 INIT_LIST_HEAD(&res_list);
810 ret = acpi_dev_get_resources(adev, &res_list,
811 acpi_populate_gpio_lookup,
816 acpi_dev_free_resource_list(&res_list);
822 *info = lookup->info;
826 static int acpi_gpio_property_lookup(struct fwnode_handle *fwnode,
827 const char *propname, int index,
828 struct acpi_gpio_lookup *lookup)
830 struct fwnode_reference_args args;
831 unsigned int quirks = 0;
834 memset(&args, 0, sizeof(args));
835 ret = __acpi_node_get_property_reference(fwnode, propname, index, 3,
838 struct acpi_device *adev;
840 adev = to_acpi_device_node(fwnode);
841 if (!acpi_get_driver_gpio_data(adev, propname, index, &args, &quirks))
845 * The property was found and resolved, so need to lookup the GPIO based
848 if (!to_acpi_device_node(args.fwnode))
853 lookup->index = args.args[0];
854 lookup->pin_index = args.args[1];
855 lookup->active_low = !!args.args[2];
857 lookup->info.adev = to_acpi_device_node(args.fwnode);
858 lookup->info.quirks = quirks;
864 * acpi_get_gpiod_by_index() - get a GPIO descriptor from device resources
865 * @adev: pointer to a ACPI device to get GPIO from
866 * @propname: Property name of the GPIO (optional)
867 * @index: index of GpioIo/GpioInt resource (starting from %0)
868 * @info: info pointer to fill in (optional)
870 * Function goes through ACPI resources for @adev and based on @index looks
871 * up a GpioIo/GpioInt resource, translates it to the Linux GPIO descriptor,
872 * and returns it. @index matches GpioIo/GpioInt resources only so if there
873 * are total %3 GPIO resources, the index goes from %0 to %2.
875 * If @propname is specified the GPIO is looked using device property. In
876 * that case @index is used to select the GPIO entry in the property value
877 * (in case of multiple).
879 * If the GPIO cannot be translated or there is an error, an ERR_PTR is
882 * Note: if the GPIO resource has multiple entries in the pin list, this
883 * function only returns the first.
885 static struct gpio_desc *acpi_get_gpiod_by_index(struct acpi_device *adev,
886 const char *propname,
888 struct acpi_gpio_info *info)
890 struct acpi_gpio_lookup lookup;
893 memset(&lookup, 0, sizeof(lookup));
894 lookup.index = index;
897 dev_dbg(&adev->dev, "GPIO: looking up %s\n", propname);
899 ret = acpi_gpio_property_lookup(acpi_fwnode_handle(adev),
900 propname, index, &lookup);
904 dev_dbg(&adev->dev, "GPIO: _DSD returned %s %d %u %u\n",
905 dev_name(&lookup.info.adev->dev), lookup.index,
906 lookup.pin_index, lookup.active_low);
908 dev_dbg(&adev->dev, "GPIO: looking up %d in _CRS\n", index);
909 lookup.info.adev = adev;
912 ret = acpi_gpio_resource_lookup(&lookup, info);
913 return ret ? ERR_PTR(ret) : lookup.desc;
917 * acpi_get_gpiod_from_data() - get a GPIO descriptor from ACPI data node
918 * @fwnode: pointer to an ACPI firmware node to get the GPIO information from
919 * @propname: Property name of the GPIO
920 * @index: index of GpioIo/GpioInt resource (starting from %0)
921 * @info: info pointer to fill in (optional)
923 * This function uses the property-based GPIO lookup to get to the GPIO
924 * resource with the relevant information from a data-only ACPI firmware node
925 * and uses that to obtain the GPIO descriptor to return.
927 * If the GPIO cannot be translated or there is an error an ERR_PTR is
930 static struct gpio_desc *acpi_get_gpiod_from_data(struct fwnode_handle *fwnode,
931 const char *propname,
933 struct acpi_gpio_info *info)
935 struct acpi_gpio_lookup lookup;
938 if (!is_acpi_data_node(fwnode))
939 return ERR_PTR(-ENODEV);
942 return ERR_PTR(-EINVAL);
944 memset(&lookup, 0, sizeof(lookup));
945 lookup.index = index;
947 ret = acpi_gpio_property_lookup(fwnode, propname, index, &lookup);
951 ret = acpi_gpio_resource_lookup(&lookup, info);
952 return ret ? ERR_PTR(ret) : lookup.desc;
955 static bool acpi_can_fallback_to_crs(struct acpi_device *adev,
958 /* If there is no ACPI device, there is no _CRS to fall back to */
962 /* Never allow fallback if the device has properties */
963 if (acpi_dev_has_props(adev) || adev->driver_gpios)
966 return con_id == NULL;
969 static struct gpio_desc *
970 __acpi_find_gpio(struct fwnode_handle *fwnode, const char *con_id, unsigned int idx,
971 bool can_fallback, struct acpi_gpio_info *info)
973 struct acpi_device *adev = to_acpi_device_node(fwnode);
974 struct gpio_desc *desc;
978 /* Try first from _DSD */
979 for (i = 0; i < ARRAY_SIZE(gpio_suffixes); i++) {
981 snprintf(propname, sizeof(propname), "%s-%s",
982 con_id, gpio_suffixes[i]);
984 snprintf(propname, sizeof(propname), "%s",
989 desc = acpi_get_gpiod_by_index(adev,
990 propname, idx, info);
992 desc = acpi_get_gpiod_from_data(fwnode,
993 propname, idx, info);
994 if (PTR_ERR(desc) == -EPROBE_DEFER)
995 return ERR_CAST(desc);
1001 /* Then from plain _CRS GPIOs */
1003 return acpi_get_gpiod_by_index(adev, NULL, idx, info);
1005 return ERR_PTR(-ENOENT);
1008 struct gpio_desc *acpi_find_gpio(struct fwnode_handle *fwnode,
1011 enum gpiod_flags *dflags,
1012 unsigned long *lookupflags)
1014 struct acpi_device *adev = to_acpi_device_node(fwnode);
1015 bool can_fallback = acpi_can_fallback_to_crs(adev, con_id);
1016 struct acpi_gpio_info info;
1017 struct gpio_desc *desc;
1019 desc = __acpi_find_gpio(fwnode, con_id, idx, can_fallback, &info);
1024 (*dflags == GPIOD_OUT_LOW || *dflags == GPIOD_OUT_HIGH)) {
1025 dev_dbg(&adev->dev, "refusing GpioInt() entry when doing GPIOD_OUT_* lookup\n");
1026 return ERR_PTR(-ENOENT);
1029 acpi_gpio_update_gpiod_flags(dflags, &info);
1030 acpi_gpio_update_gpiod_lookup_flags(lookupflags, &info);
1035 * acpi_dev_gpio_irq_wake_get_by() - Find GpioInt and translate it to Linux IRQ number
1036 * @adev: pointer to a ACPI device to get IRQ from
1037 * @con_id: optional name of GpioInt resource
1038 * @index: index of GpioInt resource (starting from %0)
1039 * @wake_capable: Set to true if the IRQ is wake capable
1041 * If the device has one or more GpioInt resources, this function can be
1042 * used to translate from the GPIO offset in the resource to the Linux IRQ
1045 * The function is idempotent, though each time it runs it will configure GPIO
1046 * pin direction according to the flags in GpioInt resource.
1048 * The function takes optional @con_id parameter. If the resource has
1049 * a @con_id in a property, then only those will be taken into account.
1051 * The GPIO is considered wake capable if the GpioInt resource specifies
1052 * SharedAndWake or ExclusiveAndWake.
1054 * Return: Linux IRQ number (> %0) on success, negative errno on failure.
1056 int acpi_dev_gpio_irq_wake_get_by(struct acpi_device *adev, const char *con_id, int index,
1059 struct fwnode_handle *fwnode = acpi_fwnode_handle(adev);
1061 unsigned int irq_flags;
1064 for (i = 0, idx = 0; idx <= index; i++) {
1065 struct acpi_gpio_info info;
1066 struct gpio_desc *desc;
1068 /* Ignore -EPROBE_DEFER, it only matters if idx matches */
1069 desc = __acpi_find_gpio(fwnode, con_id, i, true, &info);
1070 if (IS_ERR(desc) && PTR_ERR(desc) != -EPROBE_DEFER)
1071 return PTR_ERR(desc);
1073 if (info.gpioint && idx++ == index) {
1074 unsigned long lflags = GPIO_LOOKUP_FLAGS_DEFAULT;
1075 enum gpiod_flags dflags = GPIOD_ASIS;
1080 return PTR_ERR(desc);
1082 irq = gpiod_to_irq(desc);
1086 acpi_gpio_update_gpiod_flags(&dflags, &info);
1087 acpi_gpio_update_gpiod_lookup_flags(&lflags, &info);
1089 snprintf(label, sizeof(label), "%pfwP GpioInt(%d)", fwnode, index);
1090 ret = gpiod_set_consumer_name(desc, con_id ?: label);
1094 ret = gpiod_configure_flags(desc, label, lflags, dflags);
1098 /* ACPI uses hundredths of milliseconds units */
1099 ret = gpio_set_debounce_timeout(desc, info.debounce * 10);
1103 irq_flags = acpi_dev_get_irq_type(info.triggering,
1107 * If the IRQ is not already in use then set type
1108 * if specified and different than the current one.
1110 if (can_request_irq(irq, irq_flags)) {
1111 if (irq_flags != IRQ_TYPE_NONE &&
1112 irq_flags != irq_get_trigger_type(irq))
1113 irq_set_irq_type(irq, irq_flags);
1115 dev_dbg(&adev->dev, "IRQ %d already in use\n", irq);
1118 /* avoid suspend issues with GPIOs when systems are using S3 */
1119 if (wake_capable && acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0)
1120 *wake_capable = info.wake_capable;
1128 EXPORT_SYMBOL_GPL(acpi_dev_gpio_irq_wake_get_by);
1131 acpi_gpio_adr_space_handler(u32 function, acpi_physical_address address,
1132 u32 bits, u64 *value, void *handler_context,
1133 void *region_context)
1135 struct acpi_gpio_chip *achip = region_context;
1136 struct gpio_chip *chip = achip->chip;
1137 struct acpi_resource_gpio *agpio;
1138 struct acpi_resource *ares;
1139 u16 pin_index = address;
1144 status = acpi_buffer_to_resource(achip->conn_info.connection,
1145 achip->conn_info.length, &ares);
1146 if (ACPI_FAILURE(status))
1149 if (WARN_ON(ares->type != ACPI_RESOURCE_TYPE_GPIO)) {
1151 return AE_BAD_PARAMETER;
1154 agpio = &ares->data.gpio;
1156 if (WARN_ON(agpio->io_restriction == ACPI_IO_RESTRICT_INPUT &&
1157 function == ACPI_WRITE)) {
1159 return AE_BAD_PARAMETER;
1162 length = min_t(u16, agpio->pin_table_length, pin_index + bits);
1163 for (i = pin_index; i < length; ++i) {
1164 unsigned int pin = agpio->pin_table[i];
1165 struct acpi_gpio_connection *conn;
1166 struct gpio_desc *desc;
1169 mutex_lock(&achip->conn_lock);
1172 list_for_each_entry(conn, &achip->conns, node) {
1173 if (conn->pin == pin) {
1181 * The same GPIO can be shared between operation region and
1182 * event but only if the access here is ACPI_READ. In that
1183 * case we "borrow" the event GPIO instead.
1185 if (!found && agpio->shareable == ACPI_SHARED &&
1186 function == ACPI_READ) {
1187 struct acpi_gpio_event *event;
1189 list_for_each_entry(event, &achip->events, node) {
1190 if (event->pin == pin) {
1199 desc = acpi_request_own_gpiod(chip, agpio, i, "ACPI:OpRegion");
1201 mutex_unlock(&achip->conn_lock);
1206 conn = kzalloc(sizeof(*conn), GFP_KERNEL);
1208 gpiochip_free_own_desc(desc);
1209 mutex_unlock(&achip->conn_lock);
1210 status = AE_NO_MEMORY;
1216 list_add_tail(&conn->node, &achip->conns);
1219 mutex_unlock(&achip->conn_lock);
1221 if (function == ACPI_WRITE)
1222 gpiod_set_raw_value_cansleep(desc, !!(*value & BIT(i)));
1224 *value |= (u64)gpiod_get_raw_value_cansleep(desc) << i;
1232 static void acpi_gpiochip_request_regions(struct acpi_gpio_chip *achip)
1234 struct gpio_chip *chip = achip->chip;
1235 acpi_handle handle = ACPI_HANDLE(chip->parent);
1238 INIT_LIST_HEAD(&achip->conns);
1239 mutex_init(&achip->conn_lock);
1240 status = acpi_install_address_space_handler(handle, ACPI_ADR_SPACE_GPIO,
1241 acpi_gpio_adr_space_handler,
1243 if (ACPI_FAILURE(status))
1244 dev_err(chip->parent,
1245 "Failed to install GPIO OpRegion handler\n");
1248 static void acpi_gpiochip_free_regions(struct acpi_gpio_chip *achip)
1250 struct gpio_chip *chip = achip->chip;
1251 acpi_handle handle = ACPI_HANDLE(chip->parent);
1252 struct acpi_gpio_connection *conn, *tmp;
1255 status = acpi_remove_address_space_handler(handle, ACPI_ADR_SPACE_GPIO,
1256 acpi_gpio_adr_space_handler);
1257 if (ACPI_FAILURE(status)) {
1258 dev_err(chip->parent,
1259 "Failed to remove GPIO OpRegion handler\n");
1263 list_for_each_entry_safe_reverse(conn, tmp, &achip->conns, node) {
1264 gpiochip_free_own_desc(conn->desc);
1265 list_del(&conn->node);
1270 static struct gpio_desc *
1271 acpi_gpiochip_parse_own_gpio(struct acpi_gpio_chip *achip,
1272 struct fwnode_handle *fwnode,
1274 unsigned long *lflags,
1275 enum gpiod_flags *dflags)
1277 struct gpio_chip *chip = achip->chip;
1278 struct gpio_desc *desc;
1282 *lflags = GPIO_LOOKUP_FLAGS_DEFAULT;
1283 *dflags = GPIOD_ASIS;
1286 ret = fwnode_property_read_u32_array(fwnode, "gpios", gpios,
1289 return ERR_PTR(ret);
1291 desc = gpiochip_get_desc(chip, gpios[0]);
1296 *lflags |= GPIO_ACTIVE_LOW;
1298 if (fwnode_property_present(fwnode, "input"))
1299 *dflags |= GPIOD_IN;
1300 else if (fwnode_property_present(fwnode, "output-low"))
1301 *dflags |= GPIOD_OUT_LOW;
1302 else if (fwnode_property_present(fwnode, "output-high"))
1303 *dflags |= GPIOD_OUT_HIGH;
1305 return ERR_PTR(-EINVAL);
1307 fwnode_property_read_string(fwnode, "line-name", name);
1312 static void acpi_gpiochip_scan_gpios(struct acpi_gpio_chip *achip)
1314 struct gpio_chip *chip = achip->chip;
1315 struct fwnode_handle *fwnode;
1317 device_for_each_child_node(chip->parent, fwnode) {
1318 unsigned long lflags;
1319 enum gpiod_flags dflags;
1320 struct gpio_desc *desc;
1324 if (!fwnode_property_present(fwnode, "gpio-hog"))
1327 desc = acpi_gpiochip_parse_own_gpio(achip, fwnode, &name,
1332 ret = gpiod_hog(desc, name, lflags, dflags);
1334 dev_err(chip->parent, "Failed to hog GPIO\n");
1335 fwnode_handle_put(fwnode);
1341 void acpi_gpiochip_add(struct gpio_chip *chip)
1343 struct acpi_gpio_chip *acpi_gpio;
1344 struct acpi_device *adev;
1347 if (!chip || !chip->parent)
1350 adev = ACPI_COMPANION(chip->parent);
1354 acpi_gpio = kzalloc(sizeof(*acpi_gpio), GFP_KERNEL);
1356 dev_err(chip->parent,
1357 "Failed to allocate memory for ACPI GPIO chip\n");
1361 acpi_gpio->chip = chip;
1362 INIT_LIST_HEAD(&acpi_gpio->events);
1363 INIT_LIST_HEAD(&acpi_gpio->deferred_req_irqs_list_entry);
1365 status = acpi_attach_data(adev->handle, acpi_gpio_chip_dh, acpi_gpio);
1366 if (ACPI_FAILURE(status)) {
1367 dev_err(chip->parent, "Failed to attach ACPI GPIO chip\n");
1372 acpi_gpiochip_request_regions(acpi_gpio);
1373 acpi_gpiochip_scan_gpios(acpi_gpio);
1374 acpi_dev_clear_dependencies(adev);
1377 void acpi_gpiochip_remove(struct gpio_chip *chip)
1379 struct acpi_gpio_chip *acpi_gpio;
1383 if (!chip || !chip->parent)
1386 handle = ACPI_HANDLE(chip->parent);
1390 status = acpi_get_data(handle, acpi_gpio_chip_dh, (void **)&acpi_gpio);
1391 if (ACPI_FAILURE(status)) {
1392 dev_warn(chip->parent, "Failed to retrieve ACPI GPIO chip\n");
1396 acpi_gpiochip_free_regions(acpi_gpio);
1398 acpi_detach_data(handle, acpi_gpio_chip_dh);
1402 static int acpi_gpio_package_count(const union acpi_object *obj)
1404 const union acpi_object *element = obj->package.elements;
1405 const union acpi_object *end = element + obj->package.count;
1406 unsigned int count = 0;
1408 while (element < end) {
1409 switch (element->type) {
1410 case ACPI_TYPE_LOCAL_REFERENCE:
1413 case ACPI_TYPE_INTEGER:
1426 static int acpi_find_gpio_count(struct acpi_resource *ares, void *data)
1428 unsigned int *count = data;
1430 if (ares->type == ACPI_RESOURCE_TYPE_GPIO)
1431 *count += ares->data.gpio.pin_table_length;
1437 * acpi_gpio_count - count the GPIOs associated with a firmware node / function
1438 * @fwnode: firmware node of the GPIO consumer
1439 * @con_id: function within the GPIO consumer
1442 * The number of GPIOs associated with a firmware node / function or %-ENOENT,
1443 * if no GPIO has been assigned to the requested function.
1445 int acpi_gpio_count(const struct fwnode_handle *fwnode, const char *con_id)
1447 struct acpi_device *adev = to_acpi_device_node(fwnode);
1448 const union acpi_object *obj;
1449 const struct acpi_gpio_mapping *gm;
1450 int count = -ENOENT;
1455 /* Try first from _DSD */
1456 for (i = 0; i < ARRAY_SIZE(gpio_suffixes); i++) {
1458 snprintf(propname, sizeof(propname), "%s-%s",
1459 con_id, gpio_suffixes[i]);
1461 snprintf(propname, sizeof(propname), "%s",
1464 ret = acpi_dev_get_property(adev, propname, ACPI_TYPE_ANY, &obj);
1466 if (obj->type == ACPI_TYPE_LOCAL_REFERENCE)
1468 else if (obj->type == ACPI_TYPE_PACKAGE)
1469 count = acpi_gpio_package_count(obj);
1470 } else if (adev->driver_gpios) {
1471 for (gm = adev->driver_gpios; gm->name; gm++)
1472 if (strcmp(propname, gm->name) == 0) {
1481 /* Then from plain _CRS GPIOs */
1483 struct list_head resource_list;
1484 unsigned int crs_count = 0;
1486 if (!acpi_can_fallback_to_crs(adev, con_id))
1489 INIT_LIST_HEAD(&resource_list);
1490 acpi_dev_get_resources(adev, &resource_list,
1491 acpi_find_gpio_count, &crs_count);
1492 acpi_dev_free_resource_list(&resource_list);
1496 return count ? count : -ENOENT;
1499 /* Run deferred acpi_gpiochip_request_irqs() */
1500 static int __init acpi_gpio_handle_deferred_request_irqs(void)
1502 struct acpi_gpio_chip *acpi_gpio, *tmp;
1504 mutex_lock(&acpi_gpio_deferred_req_irqs_lock);
1505 list_for_each_entry_safe(acpi_gpio, tmp,
1506 &acpi_gpio_deferred_req_irqs_list,
1507 deferred_req_irqs_list_entry)
1508 acpi_gpiochip_request_irqs(acpi_gpio);
1510 acpi_gpio_deferred_req_irqs_done = true;
1511 mutex_unlock(&acpi_gpio_deferred_req_irqs_lock);
1515 /* We must use _sync so that this runs after the first deferred_probe run */
1516 late_initcall_sync(acpi_gpio_handle_deferred_request_irqs);
1518 static const struct dmi_system_id gpiolib_acpi_quirks[] __initconst = {
1521 * The Minix Neo Z83-4 has a micro-USB-B id-pin handler for
1522 * a non existing micro-USB-B connector which puts the HDMI
1523 * DDC pins in GPIO mode, breaking HDMI support.
1526 DMI_MATCH(DMI_SYS_VENDOR, "MINIX"),
1527 DMI_MATCH(DMI_PRODUCT_NAME, "Z83-4"),
1529 .driver_data = &(struct acpi_gpiolib_dmi_quirk) {
1530 .no_edge_events_on_boot = true,
1535 * The Terra Pad 1061 has a micro-USB-B id-pin handler, which
1536 * instead of controlling the actual micro-USB-B turns the 5V
1537 * boost for its USB-A connector off. The actual micro-USB-B
1538 * connector is wired for charging only.
1541 DMI_MATCH(DMI_SYS_VENDOR, "Wortmann_AG"),
1542 DMI_MATCH(DMI_PRODUCT_NAME, "TERRA_PAD_1061"),
1544 .driver_data = &(struct acpi_gpiolib_dmi_quirk) {
1545 .no_edge_events_on_boot = true,
1550 * The Dell Venue 10 Pro 5055, with Bay Trail SoC + TI PMIC uses an
1551 * external embedded-controller connected via I2C + an ACPI GPIO
1552 * event handler on INT33FFC:02 pin 12, causing spurious wakeups.
1555 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
1556 DMI_MATCH(DMI_PRODUCT_NAME, "Venue 10 Pro 5055"),
1558 .driver_data = &(struct acpi_gpiolib_dmi_quirk) {
1559 .ignore_wake = "INT33FC:02@12",
1564 * HP X2 10 models with Cherry Trail SoC + TI PMIC use an
1565 * external embedded-controller connected via I2C + an ACPI GPIO
1566 * event handler on INT33FF:01 pin 0, causing spurious wakeups.
1567 * When suspending by closing the LID, the power to the USB
1568 * keyboard is turned off, causing INT0002 ACPI events to
1569 * trigger once the XHCI controller notices the keyboard is
1570 * gone. So INT0002 events cause spurious wakeups too. Ignoring
1571 * EC wakes breaks wakeup when opening the lid, the user needs
1572 * to press the power-button to wakeup the system. The
1573 * alternative is suspend simply not working, which is worse.
1576 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
1577 DMI_MATCH(DMI_PRODUCT_NAME, "HP x2 Detachable 10-p0XX"),
1579 .driver_data = &(struct acpi_gpiolib_dmi_quirk) {
1580 .ignore_wake = "INT33FF:01@0,INT0002:00@2",
1585 * HP X2 10 models with Bay Trail SoC + AXP288 PMIC use an
1586 * external embedded-controller connected via I2C + an ACPI GPIO
1587 * event handler on INT33FC:02 pin 28, causing spurious wakeups.
1590 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1591 DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion x2 Detachable"),
1592 DMI_MATCH(DMI_BOARD_NAME, "815D"),
1594 .driver_data = &(struct acpi_gpiolib_dmi_quirk) {
1595 .ignore_wake = "INT33FC:02@28",
1600 * HP X2 10 models with Cherry Trail SoC + AXP288 PMIC use an
1601 * external embedded-controller connected via I2C + an ACPI GPIO
1602 * event handler on INT33FF:01 pin 0, causing spurious wakeups.
1605 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
1606 DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion x2 Detachable"),
1607 DMI_MATCH(DMI_BOARD_NAME, "813E"),
1609 .driver_data = &(struct acpi_gpiolib_dmi_quirk) {
1610 .ignore_wake = "INT33FF:01@0",
1615 * Interrupt storm caused from edge triggered floating pin
1616 * Found in BIOS UX325UAZ.300
1617 * https://bugzilla.kernel.org/show_bug.cgi?id=216208
1620 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
1621 DMI_MATCH(DMI_PRODUCT_NAME, "ZenBook UX325UAZ_UM325UAZ"),
1623 .driver_data = &(struct acpi_gpiolib_dmi_quirk) {
1624 .ignore_interrupt = "AMDI0030:00@18",
1629 * Spurious wakeups from TP_ATTN# pin
1630 * Found in BIOS 1.7.8
1631 * https://gitlab.freedesktop.org/drm/amd/-/issues/1722#note_1720627
1634 DMI_MATCH(DMI_BOARD_NAME, "NL5xNU"),
1636 .driver_data = &(struct acpi_gpiolib_dmi_quirk) {
1637 .ignore_wake = "ELAN0415:00@9",
1642 * Spurious wakeups from TP_ATTN# pin
1643 * Found in BIOS 1.7.8
1644 * https://gitlab.freedesktop.org/drm/amd/-/issues/1722#note_1720627
1647 DMI_MATCH(DMI_BOARD_NAME, "NL5xRU"),
1649 .driver_data = &(struct acpi_gpiolib_dmi_quirk) {
1650 .ignore_wake = "ELAN0415:00@9",
1655 * Spurious wakeups from TP_ATTN# pin
1656 * Found in BIOS 1.7.7
1659 DMI_MATCH(DMI_BOARD_NAME, "NH5xAx"),
1661 .driver_data = &(struct acpi_gpiolib_dmi_quirk) {
1662 .ignore_wake = "SYNA1202:00@16",
1667 * On the Peaq C1010 2-in-1 INT33FC:00 pin 3 is connected to
1668 * a "dolby" button. At the ACPI level an _AEI event-handler
1669 * is connected which sets an ACPI variable to 1 on both
1670 * edges. This variable can be polled + cleared to 0 using
1671 * WMI. But since the variable is set on both edges the WMI
1672 * interface is pretty useless even when polling.
1673 * So instead the x86-android-tablets code instantiates
1674 * a gpio-keys platform device for it.
1675 * Ignore the _AEI handler for the pin, so that it is not busy.
1678 DMI_MATCH(DMI_SYS_VENDOR, "PEAQ"),
1679 DMI_MATCH(DMI_PRODUCT_NAME, "PEAQ PMM C1010 MD99187"),
1681 .driver_data = &(struct acpi_gpiolib_dmi_quirk) {
1682 .ignore_interrupt = "INT33FC:00@3",
1687 * Spurious wakeups from TP_ATTN# pin
1688 * Found in BIOS 0.35
1689 * https://gitlab.freedesktop.org/drm/amd/-/issues/3073
1692 DMI_MATCH(DMI_SYS_VENDOR, "GPD"),
1693 DMI_MATCH(DMI_PRODUCT_NAME, "G1619-04"),
1695 .driver_data = &(struct acpi_gpiolib_dmi_quirk) {
1696 .ignore_wake = "PNP0C50:00@8",
1699 {} /* Terminating entry */
1702 static int __init acpi_gpio_setup_params(void)
1704 const struct acpi_gpiolib_dmi_quirk *quirk = NULL;
1705 const struct dmi_system_id *id;
1707 id = dmi_first_match(gpiolib_acpi_quirks);
1709 quirk = id->driver_data;
1711 if (run_edge_events_on_boot < 0) {
1712 if (quirk && quirk->no_edge_events_on_boot)
1713 run_edge_events_on_boot = 0;
1715 run_edge_events_on_boot = 1;
1718 if (ignore_wake == NULL && quirk && quirk->ignore_wake)
1719 ignore_wake = quirk->ignore_wake;
1721 if (ignore_interrupt == NULL && quirk && quirk->ignore_interrupt)
1722 ignore_interrupt = quirk->ignore_interrupt;
1727 /* Directly after dmi_setup() which runs as core_initcall() */
1728 postcore_initcall(acpi_gpio_setup_params);