Commit | Line | Data |
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dae5f0af | 1 | // SPDX-License-Identifier: GPL-2.0 |
e29482e8 MN |
2 | /* |
3 | * ACPI helpers for GPIO API | |
4 | * | |
5 | * Copyright (C) 2012, Intel Corporation | |
6 | * Authors: Mathias Nyman <mathias.nyman@linux.intel.com> | |
7 | * Mika Westerberg <mika.westerberg@linux.intel.com> | |
e29482e8 MN |
8 | */ |
9 | ||
61f7f7c8 | 10 | #include <linux/dmi.h> |
e29482e8 | 11 | #include <linux/errno.h> |
936e15dd | 12 | #include <linux/gpio/consumer.h> |
5ccff852 | 13 | #include <linux/gpio/driver.h> |
031ba28a | 14 | #include <linux/gpio/machine.h> |
e29482e8 | 15 | #include <linux/export.h> |
e29482e8 | 16 | #include <linux/acpi.h> |
0d1c28a4 | 17 | #include <linux/interrupt.h> |
473ed7be | 18 | #include <linux/mutex.h> |
354567e6 | 19 | #include <linux/pinctrl/pinctrl.h> |
e29482e8 | 20 | |
5ccff852 | 21 | #include "gpiolib.h" |
77cb907a | 22 | #include "gpiolib-acpi.h" |
5ccff852 | 23 | |
61f7f7c8 HG |
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"); | |
28 | ||
2ccb21f5 HG |
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[,...]]"); | |
34 | ||
35 | struct acpi_gpiolib_dmi_quirk { | |
36 | bool no_edge_events_on_boot; | |
37 | char *ignore_wake; | |
38 | }; | |
aa23ca3d | 39 | |
e59f5e08 HG |
40 | /** |
41 | * struct acpi_gpio_event - ACPI GPIO event handler data | |
42 | * | |
43 | * @node: list-entry of the events list of the struct acpi_gpio_chip | |
44 | * @handle: handle of ACPI method to execute when the IRQ triggers | |
85edcd01 AS |
45 | * @handler: handler function to pass to request_irq() when requesting the IRQ |
46 | * @pin: GPIO pin number on the struct gpio_chip | |
47 | * @irq: Linux IRQ number for the event, for request_irq() / free_irq() | |
48 | * @irqflags: flags to pass to request_irq() when requesting the IRQ | |
e59f5e08 | 49 | * @irq_is_wake: If the ACPI flags indicate the IRQ is a wakeup source |
85edcd01 AS |
50 | * @irq_requested:True if request_irq() has been done |
51 | * @desc: struct gpio_desc for the GPIO pin for this event | |
e59f5e08 | 52 | */ |
4b01a14b | 53 | struct acpi_gpio_event { |
7fc7acb9 | 54 | struct list_head node; |
4b01a14b | 55 | acpi_handle handle; |
e59f5e08 | 56 | irq_handler_t handler; |
7fc7acb9 RW |
57 | unsigned int pin; |
58 | unsigned int irq; | |
e59f5e08 HG |
59 | unsigned long irqflags; |
60 | bool irq_is_wake; | |
61 | bool irq_requested; | |
e46cf32c | 62 | struct gpio_desc *desc; |
7fc7acb9 RW |
63 | }; |
64 | ||
473ed7be MW |
65 | struct acpi_gpio_connection { |
66 | struct list_head node; | |
e46cf32c | 67 | unsigned int pin; |
473ed7be MW |
68 | struct gpio_desc *desc; |
69 | }; | |
70 | ||
aa92b6f6 | 71 | struct acpi_gpio_chip { |
473ed7be MW |
72 | /* |
73 | * ACPICA requires that the first field of the context parameter | |
74 | * passed to acpi_install_address_space_handler() is large enough | |
75 | * to hold struct acpi_connection_info. | |
76 | */ | |
77 | struct acpi_connection_info conn_info; | |
78 | struct list_head conns; | |
79 | struct mutex conn_lock; | |
aa92b6f6 | 80 | struct gpio_chip *chip; |
4b01a14b | 81 | struct list_head events; |
78d3a92e | 82 | struct list_head deferred_req_irqs_list_entry; |
aa92b6f6 MW |
83 | }; |
84 | ||
78d3a92e | 85 | /* |
85edcd01 | 86 | * For GPIO chips which call acpi_gpiochip_request_interrupts() before late_init |
e59f5e08 | 87 | * (so builtin drivers) we register the ACPI GpioInt IRQ handlers from a |
85edcd01 AS |
88 | * late_initcall_sync() handler, so that other builtin drivers can register their |
89 | * OpRegions before the event handlers can run. This list contains GPIO chips | |
e59f5e08 | 90 | * for which the acpi_gpiochip_request_irqs() call has been deferred. |
78d3a92e HG |
91 | */ |
92 | static DEFINE_MUTEX(acpi_gpio_deferred_req_irqs_lock); | |
93 | static LIST_HEAD(acpi_gpio_deferred_req_irqs_list); | |
94 | static bool acpi_gpio_deferred_req_irqs_done; | |
ca876c74 | 95 | |
e29482e8 MN |
96 | static int acpi_gpiochip_find(struct gpio_chip *gc, void *data) |
97 | { | |
58383c78 | 98 | if (!gc->parent) |
e29482e8 MN |
99 | return false; |
100 | ||
58383c78 | 101 | return ACPI_HANDLE(gc->parent) == data; |
e29482e8 MN |
102 | } |
103 | ||
104 | /** | |
936e15dd | 105 | * acpi_get_gpiod() - Translate ACPI GPIO pin to GPIO descriptor usable with GPIO API |
e29482e8 MN |
106 | * @path: ACPI GPIO controller full path name, (e.g. "\\_SB.GPO1") |
107 | * @pin: ACPI GPIO pin number (0-based, controller-relative) | |
108 | * | |
f35bbf61 MW |
109 | * Return: GPIO descriptor to use with Linux generic GPIO API, or ERR_PTR |
110 | * error value. Specifically returns %-EPROBE_DEFER if the referenced GPIO | |
85edcd01 | 111 | * controller does not have GPIO chip registered at the moment. This is to |
f35bbf61 | 112 | * support probe deferral. |
e29482e8 | 113 | */ |
936e15dd | 114 | static struct gpio_desc *acpi_get_gpiod(char *path, int pin) |
e29482e8 MN |
115 | { |
116 | struct gpio_chip *chip; | |
117 | acpi_handle handle; | |
118 | acpi_status status; | |
119 | ||
120 | status = acpi_get_handle(NULL, path, &handle); | |
121 | if (ACPI_FAILURE(status)) | |
936e15dd | 122 | return ERR_PTR(-ENODEV); |
e29482e8 MN |
123 | |
124 | chip = gpiochip_find(handle, acpi_gpiochip_find); | |
125 | if (!chip) | |
f35bbf61 | 126 | return ERR_PTR(-EPROBE_DEFER); |
e29482e8 | 127 | |
03c4749d | 128 | return gpiochip_get_desc(chip, pin); |
e29482e8 | 129 | } |
0d1c28a4 | 130 | |
0d1c28a4 MN |
131 | static irqreturn_t acpi_gpio_irq_handler(int irq, void *data) |
132 | { | |
6072b9dc | 133 | struct acpi_gpio_event *event = data; |
0d1c28a4 | 134 | |
6072b9dc | 135 | acpi_evaluate_object(event->handle, NULL, NULL, NULL); |
0d1c28a4 MN |
136 | |
137 | return IRQ_HANDLED; | |
138 | } | |
139 | ||
7fc7acb9 RW |
140 | static irqreturn_t acpi_gpio_irq_handler_evt(int irq, void *data) |
141 | { | |
4b01a14b | 142 | struct acpi_gpio_event *event = data; |
7fc7acb9 | 143 | |
4b01a14b | 144 | acpi_execute_simple_method(event->handle, NULL, event->pin); |
7fc7acb9 RW |
145 | |
146 | return IRQ_HANDLED; | |
147 | } | |
148 | ||
aa92b6f6 | 149 | static void acpi_gpio_chip_dh(acpi_handle handle, void *data) |
7fc7acb9 RW |
150 | { |
151 | /* The address of this function is used as a key. */ | |
152 | } | |
153 | ||
25e3ef89 AS |
154 | bool acpi_gpio_get_irq_resource(struct acpi_resource *ares, |
155 | struct acpi_resource_gpio **agpio) | |
156 | { | |
157 | struct acpi_resource_gpio *gpio; | |
158 | ||
159 | if (ares->type != ACPI_RESOURCE_TYPE_GPIO) | |
160 | return false; | |
161 | ||
162 | gpio = &ares->data.gpio; | |
163 | if (gpio->connection_type != ACPI_RESOURCE_GPIO_TYPE_INT) | |
164 | return false; | |
165 | ||
166 | *agpio = gpio; | |
167 | return true; | |
168 | } | |
169 | EXPORT_SYMBOL_GPL(acpi_gpio_get_irq_resource); | |
170 | ||
e59f5e08 HG |
171 | static void acpi_gpiochip_request_irq(struct acpi_gpio_chip *acpi_gpio, |
172 | struct acpi_gpio_event *event) | |
173 | { | |
174 | int ret, value; | |
175 | ||
176 | ret = request_threaded_irq(event->irq, NULL, event->handler, | |
177 | event->irqflags, "ACPI:Event", event); | |
178 | if (ret) { | |
179 | dev_err(acpi_gpio->chip->parent, | |
180 | "Failed to setup interrupt handler for %d\n", | |
181 | event->irq); | |
182 | return; | |
183 | } | |
184 | ||
185 | if (event->irq_is_wake) | |
186 | enable_irq_wake(event->irq); | |
187 | ||
188 | event->irq_requested = true; | |
189 | ||
190 | /* Make sure we trigger the initial state of edge-triggered IRQs */ | |
61f7f7c8 HG |
191 | if (run_edge_events_on_boot && |
192 | (event->irqflags & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING))) { | |
193 | value = gpiod_get_raw_value_cansleep(event->desc); | |
194 | if (((event->irqflags & IRQF_TRIGGER_RISING) && value == 1) || | |
195 | ((event->irqflags & IRQF_TRIGGER_FALLING) && value == 0)) | |
196 | event->handler(event->irq, event); | |
197 | } | |
e59f5e08 HG |
198 | } |
199 | ||
200 | static void acpi_gpiochip_request_irqs(struct acpi_gpio_chip *acpi_gpio) | |
201 | { | |
202 | struct acpi_gpio_event *event; | |
203 | ||
204 | list_for_each_entry(event, &acpi_gpio->events, node) | |
205 | acpi_gpiochip_request_irq(acpi_gpio, event); | |
206 | } | |
207 | ||
2ccb21f5 HG |
208 | static bool acpi_gpio_in_ignore_list(const char *controller_in, int pin_in) |
209 | { | |
210 | const char *controller, *pin_str; | |
211 | int len, pin; | |
212 | char *endp; | |
213 | ||
214 | controller = ignore_wake; | |
215 | while (controller) { | |
216 | pin_str = strchr(controller, '@'); | |
217 | if (!pin_str) | |
218 | goto err; | |
219 | ||
220 | len = pin_str - controller; | |
221 | if (len == strlen(controller_in) && | |
222 | strncmp(controller, controller_in, len) == 0) { | |
223 | pin = simple_strtoul(pin_str + 1, &endp, 10); | |
224 | if (*endp != 0 && *endp != ',') | |
225 | goto err; | |
226 | ||
227 | if (pin == pin_in) | |
228 | return true; | |
229 | } | |
230 | ||
231 | controller = strchr(controller, ','); | |
232 | if (controller) | |
233 | controller++; | |
234 | } | |
235 | ||
236 | return false; | |
237 | err: | |
238 | pr_err_once("Error invalid value for gpiolib_acpi.ignore_wake: %s\n", | |
239 | ignore_wake); | |
240 | return false; | |
241 | } | |
242 | ||
243 | static bool acpi_gpio_irq_is_wake(struct device *parent, | |
244 | struct acpi_resource_gpio *agpio) | |
245 | { | |
246 | int pin = agpio->pin_table[0]; | |
247 | ||
248 | if (agpio->wake_capable != ACPI_WAKE_CAPABLE) | |
249 | return false; | |
250 | ||
251 | if (acpi_gpio_in_ignore_list(dev_name(parent), pin)) { | |
252 | dev_info(parent, "Ignoring wakeup on pin %d\n", pin); | |
253 | return false; | |
254 | } | |
255 | ||
256 | return true; | |
257 | } | |
258 | ||
d4fc46f1 | 259 | /* Always returns AE_OK so that we keep looping over the resources */ |
e59f5e08 HG |
260 | static acpi_status acpi_gpiochip_alloc_event(struct acpi_resource *ares, |
261 | void *context) | |
0d1c28a4 | 262 | { |
6072b9dc | 263 | struct acpi_gpio_chip *acpi_gpio = context; |
aa92b6f6 | 264 | struct gpio_chip *chip = acpi_gpio->chip; |
6072b9dc | 265 | struct acpi_resource_gpio *agpio; |
7fc7acb9 | 266 | acpi_handle handle, evt_handle; |
6072b9dc MW |
267 | struct acpi_gpio_event *event; |
268 | irq_handler_t handler = NULL; | |
269 | struct gpio_desc *desc; | |
e59f5e08 | 270 | int ret, pin, irq; |
0d1c28a4 | 271 | |
25e3ef89 | 272 | if (!acpi_gpio_get_irq_resource(ares, &agpio)) |
6072b9dc | 273 | return AE_OK; |
0d1c28a4 | 274 | |
58383c78 | 275 | handle = ACPI_HANDLE(chip->parent); |
6072b9dc MW |
276 | pin = agpio->pin_table[0]; |
277 | ||
278 | if (pin <= 255) { | |
279 | char ev_name[5]; | |
e40a3ae1 | 280 | sprintf(ev_name, "_%c%02hhX", |
6072b9dc MW |
281 | agpio->triggering == ACPI_EDGE_SENSITIVE ? 'E' : 'L', |
282 | pin); | |
283 | if (ACPI_SUCCESS(acpi_get_handle(handle, ev_name, &evt_handle))) | |
284 | handler = acpi_gpio_irq_handler; | |
285 | } | |
286 | if (!handler) { | |
287 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_EVT", &evt_handle))) | |
288 | handler = acpi_gpio_irq_handler_evt; | |
289 | } | |
290 | if (!handler) | |
c06632ea | 291 | return AE_OK; |
0d1c28a4 | 292 | |
5923ea6c LW |
293 | desc = gpiochip_request_own_desc(chip, pin, "ACPI:Event", |
294 | GPIO_ACTIVE_HIGH, GPIOD_IN); | |
6072b9dc | 295 | if (IS_ERR(desc)) { |
3f86a7e0 HG |
296 | dev_err(chip->parent, |
297 | "Failed to request GPIO for pin 0x%04X, err %ld\n", | |
298 | pin, PTR_ERR(desc)); | |
d4fc46f1 | 299 | return AE_OK; |
6072b9dc | 300 | } |
0d1c28a4 | 301 | |
e3a2e878 | 302 | ret = gpiochip_lock_as_irq(chip, pin); |
6072b9dc | 303 | if (ret) { |
3f86a7e0 HG |
304 | dev_err(chip->parent, |
305 | "Failed to lock GPIO pin 0x%04X as interrupt, err %d\n", | |
306 | pin, ret); | |
6072b9dc MW |
307 | goto fail_free_desc; |
308 | } | |
0d1c28a4 | 309 | |
6072b9dc MW |
310 | irq = gpiod_to_irq(desc); |
311 | if (irq < 0) { | |
3f86a7e0 HG |
312 | dev_err(chip->parent, |
313 | "Failed to translate GPIO pin 0x%04X to IRQ, err %d\n", | |
314 | pin, irq); | |
6072b9dc MW |
315 | goto fail_unlock_irq; |
316 | } | |
7fc7acb9 | 317 | |
e59f5e08 HG |
318 | event = kzalloc(sizeof(*event), GFP_KERNEL); |
319 | if (!event) | |
320 | goto fail_unlock_irq; | |
321 | ||
322 | event->irqflags = IRQF_ONESHOT; | |
6072b9dc MW |
323 | if (agpio->triggering == ACPI_LEVEL_SENSITIVE) { |
324 | if (agpio->polarity == ACPI_ACTIVE_HIGH) | |
e59f5e08 | 325 | event->irqflags |= IRQF_TRIGGER_HIGH; |
6072b9dc | 326 | else |
e59f5e08 | 327 | event->irqflags |= IRQF_TRIGGER_LOW; |
6072b9dc MW |
328 | } else { |
329 | switch (agpio->polarity) { | |
330 | case ACPI_ACTIVE_HIGH: | |
e59f5e08 | 331 | event->irqflags |= IRQF_TRIGGER_RISING; |
6072b9dc MW |
332 | break; |
333 | case ACPI_ACTIVE_LOW: | |
e59f5e08 | 334 | event->irqflags |= IRQF_TRIGGER_FALLING; |
6072b9dc MW |
335 | break; |
336 | default: | |
e59f5e08 HG |
337 | event->irqflags |= IRQF_TRIGGER_RISING | |
338 | IRQF_TRIGGER_FALLING; | |
6072b9dc | 339 | break; |
7fc7acb9 | 340 | } |
6072b9dc | 341 | } |
aa92b6f6 | 342 | |
6072b9dc | 343 | event->handle = evt_handle; |
e59f5e08 | 344 | event->handler = handler; |
6072b9dc | 345 | event->irq = irq; |
2ccb21f5 | 346 | event->irq_is_wake = acpi_gpio_irq_is_wake(chip->parent, agpio); |
6072b9dc | 347 | event->pin = pin; |
e46cf32c | 348 | event->desc = desc; |
7fc7acb9 | 349 | |
6072b9dc | 350 | list_add_tail(&event->node, &acpi_gpio->events); |
ca876c74 | 351 | |
6072b9dc MW |
352 | return AE_OK; |
353 | ||
6072b9dc | 354 | fail_unlock_irq: |
e3a2e878 | 355 | gpiochip_unlock_as_irq(chip, pin); |
6072b9dc MW |
356 | fail_free_desc: |
357 | gpiochip_free_own_desc(desc); | |
358 | ||
d4fc46f1 | 359 | return AE_OK; |
0d1c28a4 | 360 | } |
7fc7acb9 | 361 | |
70b53411 | 362 | /** |
6072b9dc | 363 | * acpi_gpiochip_request_interrupts() - Register isr for gpio chip ACPI events |
afa82fab | 364 | * @chip: GPIO chip |
70b53411 | 365 | * |
6072b9dc MW |
366 | * ACPI5 platforms can use GPIO signaled ACPI events. These GPIO interrupts are |
367 | * handled by ACPI event methods which need to be called from the GPIO | |
85edcd01 AS |
368 | * chip's interrupt handler. acpi_gpiochip_request_interrupts() finds out which |
369 | * GPIO pins have ACPI event methods and assigns interrupt handlers that calls | |
370 | * the ACPI event methods for those pins. | |
6072b9dc | 371 | */ |
afa82fab | 372 | void acpi_gpiochip_request_interrupts(struct gpio_chip *chip) |
6072b9dc | 373 | { |
afa82fab MW |
374 | struct acpi_gpio_chip *acpi_gpio; |
375 | acpi_handle handle; | |
376 | acpi_status status; | |
78d3a92e | 377 | bool defer; |
afa82fab | 378 | |
58383c78 | 379 | if (!chip->parent || !chip->to_irq) |
afa82fab | 380 | return; |
6072b9dc | 381 | |
58383c78 | 382 | handle = ACPI_HANDLE(chip->parent); |
afa82fab MW |
383 | if (!handle) |
384 | return; | |
385 | ||
386 | status = acpi_get_data(handle, acpi_gpio_chip_dh, (void **)&acpi_gpio); | |
387 | if (ACPI_FAILURE(status)) | |
6072b9dc MW |
388 | return; |
389 | ||
e59f5e08 HG |
390 | acpi_walk_resources(handle, "_AEI", |
391 | acpi_gpiochip_alloc_event, acpi_gpio); | |
392 | ||
78d3a92e HG |
393 | mutex_lock(&acpi_gpio_deferred_req_irqs_lock); |
394 | defer = !acpi_gpio_deferred_req_irqs_done; | |
395 | if (defer) | |
396 | list_add(&acpi_gpio->deferred_req_irqs_list_entry, | |
397 | &acpi_gpio_deferred_req_irqs_list); | |
398 | mutex_unlock(&acpi_gpio_deferred_req_irqs_lock); | |
399 | ||
400 | if (defer) | |
401 | return; | |
402 | ||
e59f5e08 | 403 | acpi_gpiochip_request_irqs(acpi_gpio); |
6072b9dc | 404 | } |
2b528fff | 405 | EXPORT_SYMBOL_GPL(acpi_gpiochip_request_interrupts); |
6072b9dc MW |
406 | |
407 | /** | |
408 | * acpi_gpiochip_free_interrupts() - Free GPIO ACPI event interrupts. | |
afa82fab | 409 | * @chip: GPIO chip |
70b53411 | 410 | * |
6072b9dc MW |
411 | * Free interrupts associated with GPIO ACPI event method for the given |
412 | * GPIO chip. | |
70b53411 | 413 | */ |
afa82fab | 414 | void acpi_gpiochip_free_interrupts(struct gpio_chip *chip) |
70b53411 | 415 | { |
afa82fab | 416 | struct acpi_gpio_chip *acpi_gpio; |
4b01a14b | 417 | struct acpi_gpio_event *event, *ep; |
afa82fab MW |
418 | acpi_handle handle; |
419 | acpi_status status; | |
420 | ||
58383c78 | 421 | if (!chip->parent || !chip->to_irq) |
afa82fab | 422 | return; |
70b53411 | 423 | |
58383c78 | 424 | handle = ACPI_HANDLE(chip->parent); |
afa82fab MW |
425 | if (!handle) |
426 | return; | |
427 | ||
428 | status = acpi_get_data(handle, acpi_gpio_chip_dh, (void **)&acpi_gpio); | |
429 | if (ACPI_FAILURE(status)) | |
70b53411 MW |
430 | return; |
431 | ||
78d3a92e HG |
432 | mutex_lock(&acpi_gpio_deferred_req_irqs_lock); |
433 | if (!list_empty(&acpi_gpio->deferred_req_irqs_list_entry)) | |
434 | list_del_init(&acpi_gpio->deferred_req_irqs_list_entry); | |
435 | mutex_unlock(&acpi_gpio_deferred_req_irqs_lock); | |
436 | ||
4b01a14b | 437 | list_for_each_entry_safe_reverse(event, ep, &acpi_gpio->events, node) { |
e59f5e08 HG |
438 | if (event->irq_requested) { |
439 | if (event->irq_is_wake) | |
440 | disable_irq_wake(event->irq); | |
441 | ||
442 | free_irq(event->irq, event); | |
443 | } | |
8a146fbe | 444 | |
e3a2e878 | 445 | gpiochip_unlock_as_irq(chip, event->pin); |
86252329 | 446 | gpiochip_free_own_desc(event->desc); |
4b01a14b MW |
447 | list_del(&event->node); |
448 | kfree(event); | |
70b53411 | 449 | } |
70b53411 | 450 | } |
2b528fff | 451 | EXPORT_SYMBOL_GPL(acpi_gpiochip_free_interrupts); |
70b53411 | 452 | |
f028d524 RW |
453 | int acpi_dev_add_driver_gpios(struct acpi_device *adev, |
454 | const struct acpi_gpio_mapping *gpios) | |
455 | { | |
456 | if (adev && gpios) { | |
457 | adev->driver_gpios = gpios; | |
458 | return 0; | |
459 | } | |
460 | return -EINVAL; | |
461 | } | |
462 | EXPORT_SYMBOL_GPL(acpi_dev_add_driver_gpios); | |
463 | ||
2838bf94 AS |
464 | void acpi_dev_remove_driver_gpios(struct acpi_device *adev) |
465 | { | |
466 | if (adev) | |
467 | adev->driver_gpios = NULL; | |
468 | } | |
469 | EXPORT_SYMBOL_GPL(acpi_dev_remove_driver_gpios); | |
470 | ||
85c73d50 AS |
471 | static void devm_acpi_dev_release_driver_gpios(struct device *dev, void *res) |
472 | { | |
473 | acpi_dev_remove_driver_gpios(ACPI_COMPANION(dev)); | |
474 | } | |
475 | ||
476 | int devm_acpi_dev_add_driver_gpios(struct device *dev, | |
477 | const struct acpi_gpio_mapping *gpios) | |
478 | { | |
479 | void *res; | |
480 | int ret; | |
481 | ||
482 | res = devres_alloc(devm_acpi_dev_release_driver_gpios, 0, GFP_KERNEL); | |
483 | if (!res) | |
484 | return -ENOMEM; | |
485 | ||
486 | ret = acpi_dev_add_driver_gpios(ACPI_COMPANION(dev), gpios); | |
487 | if (ret) { | |
488 | devres_free(res); | |
489 | return ret; | |
490 | } | |
491 | devres_add(dev, res); | |
492 | return 0; | |
493 | } | |
494 | EXPORT_SYMBOL_GPL(devm_acpi_dev_add_driver_gpios); | |
495 | ||
496 | void devm_acpi_dev_remove_driver_gpios(struct device *dev) | |
497 | { | |
498 | WARN_ON(devres_release(dev, devm_acpi_dev_release_driver_gpios, NULL, NULL)); | |
499 | } | |
500 | EXPORT_SYMBOL_GPL(devm_acpi_dev_remove_driver_gpios); | |
501 | ||
f028d524 RW |
502 | static bool acpi_get_driver_gpio_data(struct acpi_device *adev, |
503 | const char *name, int index, | |
977d5ad3 | 504 | struct fwnode_reference_args *args, |
ce0929d2 | 505 | unsigned int *quirks) |
f028d524 RW |
506 | { |
507 | const struct acpi_gpio_mapping *gm; | |
508 | ||
509 | if (!adev->driver_gpios) | |
510 | return false; | |
511 | ||
512 | for (gm = adev->driver_gpios; gm->name; gm++) | |
513 | if (!strcmp(name, gm->name) && gm->data && index < gm->size) { | |
514 | const struct acpi_gpio_params *par = gm->data + index; | |
515 | ||
977d5ad3 | 516 | args->fwnode = acpi_fwnode_handle(adev); |
f028d524 RW |
517 | args->args[0] = par->crs_entry_index; |
518 | args->args[1] = par->line_index; | |
519 | args->args[2] = par->active_low; | |
520 | args->nargs = 3; | |
ce0929d2 AS |
521 | |
522 | *quirks = gm->quirks; | |
f028d524 RW |
523 | return true; |
524 | } | |
525 | ||
526 | return false; | |
527 | } | |
528 | ||
2eca25af AS |
529 | static enum gpiod_flags |
530 | acpi_gpio_to_gpiod_flags(const struct acpi_resource_gpio *agpio) | |
531 | { | |
2eca25af AS |
532 | switch (agpio->io_restriction) { |
533 | case ACPI_IO_RESTRICT_INPUT: | |
534 | return GPIOD_IN; | |
535 | case ACPI_IO_RESTRICT_OUTPUT: | |
536 | /* | |
537 | * ACPI GPIO resources don't contain an initial value for the | |
538 | * GPIO. Therefore we deduce that value from the pull field | |
539 | * instead. If the pin is pulled up we assume default to be | |
24a49543 AS |
540 | * high, if it is pulled down we assume default to be low, |
541 | * otherwise we leave pin untouched. | |
2eca25af | 542 | */ |
24a49543 AS |
543 | switch (agpio->pin_config) { |
544 | case ACPI_PIN_CONFIG_PULLUP: | |
545 | return GPIOD_OUT_HIGH; | |
546 | case ACPI_PIN_CONFIG_PULLDOWN: | |
547 | return GPIOD_OUT_LOW; | |
548 | default: | |
549 | break; | |
550 | } | |
2eca25af | 551 | default: |
24a49543 | 552 | break; |
2eca25af | 553 | } |
24a49543 AS |
554 | |
555 | /* | |
556 | * Assume that the BIOS has configured the direction and pull | |
557 | * accordingly. | |
558 | */ | |
559 | return GPIOD_ASIS; | |
2eca25af AS |
560 | } |
561 | ||
5c34b6c1 AS |
562 | static int |
563 | __acpi_gpio_update_gpiod_flags(enum gpiod_flags *flags, enum gpiod_flags update) | |
a31f5c3a | 564 | { |
72893f0c HG |
565 | const enum gpiod_flags mask = |
566 | GPIOD_FLAGS_BIT_DIR_SET | GPIOD_FLAGS_BIT_DIR_OUT | | |
567 | GPIOD_FLAGS_BIT_DIR_VAL; | |
a31f5c3a AS |
568 | int ret = 0; |
569 | ||
570 | /* | |
571 | * Check if the BIOS has IoRestriction with explicitly set direction | |
572 | * and update @flags accordingly. Otherwise use whatever caller asked | |
573 | * for. | |
574 | */ | |
575 | if (update & GPIOD_FLAGS_BIT_DIR_SET) { | |
576 | enum gpiod_flags diff = *flags ^ update; | |
577 | ||
578 | /* | |
579 | * Check if caller supplied incompatible GPIO initialization | |
580 | * flags. | |
581 | * | |
582 | * Return %-EINVAL to notify that firmware has different | |
583 | * settings and we are going to use them. | |
584 | */ | |
585 | if (((*flags & GPIOD_FLAGS_BIT_DIR_SET) && (diff & GPIOD_FLAGS_BIT_DIR_OUT)) || | |
586 | ((*flags & GPIOD_FLAGS_BIT_DIR_OUT) && (diff & GPIOD_FLAGS_BIT_DIR_VAL))) | |
587 | ret = -EINVAL; | |
72893f0c | 588 | *flags = (*flags & ~mask) | (update & mask); |
a31f5c3a AS |
589 | } |
590 | return ret; | |
591 | } | |
592 | ||
5c34b6c1 AS |
593 | int |
594 | acpi_gpio_update_gpiod_flags(enum gpiod_flags *flags, struct acpi_gpio_info *info) | |
595 | { | |
596 | struct device *dev = &info->adev->dev; | |
1b2ca32a | 597 | enum gpiod_flags old = *flags; |
5c34b6c1 AS |
598 | int ret; |
599 | ||
1b2ca32a AS |
600 | ret = __acpi_gpio_update_gpiod_flags(&old, info->flags); |
601 | if (info->quirks & ACPI_GPIO_QUIRK_NO_IO_RESTRICTION) { | |
602 | if (ret) | |
603 | dev_warn(dev, FW_BUG "GPIO not in correct mode, fixing\n"); | |
604 | } else { | |
605 | if (ret) | |
606 | dev_dbg(dev, "Override GPIO initialization flags\n"); | |
607 | *flags = old; | |
608 | } | |
5c34b6c1 AS |
609 | |
610 | return ret; | |
611 | } | |
612 | ||
606be344 AS |
613 | int acpi_gpio_update_gpiod_lookup_flags(unsigned long *lookupflags, |
614 | struct acpi_gpio_info *info) | |
615 | { | |
2d3b6db1 AS |
616 | switch (info->pin_config) { |
617 | case ACPI_PIN_CONFIG_PULLUP: | |
618 | *lookupflags |= GPIO_PULL_UP; | |
619 | break; | |
620 | case ACPI_PIN_CONFIG_PULLDOWN: | |
621 | *lookupflags |= GPIO_PULL_DOWN; | |
622 | break; | |
623 | default: | |
624 | break; | |
625 | } | |
626 | ||
606be344 AS |
627 | if (info->polarity == GPIO_ACTIVE_LOW) |
628 | *lookupflags |= GPIO_ACTIVE_LOW; | |
629 | ||
630 | return 0; | |
631 | } | |
632 | ||
12028d2d MW |
633 | struct acpi_gpio_lookup { |
634 | struct acpi_gpio_info info; | |
635 | int index; | |
0d9a693c | 636 | int pin_index; |
d079524a | 637 | bool active_low; |
936e15dd | 638 | struct gpio_desc *desc; |
12028d2d MW |
639 | int n; |
640 | }; | |
641 | ||
031ba28a | 642 | static int acpi_populate_gpio_lookup(struct acpi_resource *ares, void *data) |
12028d2d MW |
643 | { |
644 | struct acpi_gpio_lookup *lookup = data; | |
645 | ||
646 | if (ares->type != ACPI_RESOURCE_TYPE_GPIO) | |
647 | return 1; | |
648 | ||
4d1f7a6e | 649 | if (!lookup->desc) { |
12028d2d | 650 | const struct acpi_resource_gpio *agpio = &ares->data.gpio; |
4d1f7a6e AS |
651 | bool gpioint = agpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT; |
652 | int pin_index; | |
0d9a693c | 653 | |
4d1f7a6e AS |
654 | if (lookup->info.quirks & ACPI_GPIO_QUIRK_ONLY_GPIOIO && gpioint) |
655 | lookup->index++; | |
656 | ||
657 | if (lookup->n++ != lookup->index) | |
658 | return 1; | |
659 | ||
660 | pin_index = lookup->pin_index; | |
0d9a693c MW |
661 | if (pin_index >= agpio->pin_table_length) |
662 | return 1; | |
12028d2d | 663 | |
936e15dd | 664 | lookup->desc = acpi_get_gpiod(agpio->resource_source.string_ptr, |
0d9a693c | 665 | agpio->pin_table[pin_index]); |
2d3b6db1 | 666 | lookup->info.pin_config = agpio->pin_config; |
4d1f7a6e | 667 | lookup->info.gpioint = gpioint; |
0d9a693c MW |
668 | |
669 | /* | |
e567c35f AS |
670 | * Polarity and triggering are only specified for GpioInt |
671 | * resource. | |
52044723 CR |
672 | * Note: we expect here: |
673 | * - ACPI_ACTIVE_LOW == GPIO_ACTIVE_LOW | |
674 | * - ACPI_ACTIVE_HIGH == GPIO_ACTIVE_HIGH | |
0d9a693c | 675 | */ |
52044723 | 676 | if (lookup->info.gpioint) { |
a31f5c3a | 677 | lookup->info.flags = GPIOD_IN; |
52044723 CR |
678 | lookup->info.polarity = agpio->polarity; |
679 | lookup->info.triggering = agpio->triggering; | |
a31f5c3a AS |
680 | } else { |
681 | lookup->info.flags = acpi_gpio_to_gpiod_flags(agpio); | |
f67a6c11 | 682 | lookup->info.polarity = lookup->active_low; |
52044723 | 683 | } |
12028d2d MW |
684 | } |
685 | ||
686 | return 1; | |
687 | } | |
688 | ||
d079524a RW |
689 | static int acpi_gpio_resource_lookup(struct acpi_gpio_lookup *lookup, |
690 | struct acpi_gpio_info *info) | |
691 | { | |
5870cff4 | 692 | struct acpi_device *adev = lookup->info.adev; |
d079524a RW |
693 | struct list_head res_list; |
694 | int ret; | |
695 | ||
696 | INIT_LIST_HEAD(&res_list); | |
697 | ||
5870cff4 | 698 | ret = acpi_dev_get_resources(adev, &res_list, |
031ba28a | 699 | acpi_populate_gpio_lookup, |
d079524a RW |
700 | lookup); |
701 | if (ret < 0) | |
702 | return ret; | |
703 | ||
704 | acpi_dev_free_resource_list(&res_list); | |
705 | ||
706 | if (!lookup->desc) | |
707 | return -ENOENT; | |
708 | ||
f67a6c11 | 709 | if (info) |
d079524a | 710 | *info = lookup->info; |
d079524a RW |
711 | return 0; |
712 | } | |
713 | ||
504a3374 | 714 | static int acpi_gpio_property_lookup(struct fwnode_handle *fwnode, |
d079524a RW |
715 | const char *propname, int index, |
716 | struct acpi_gpio_lookup *lookup) | |
717 | { | |
977d5ad3 | 718 | struct fwnode_reference_args args; |
ce0929d2 | 719 | unsigned int quirks = 0; |
d079524a RW |
720 | int ret; |
721 | ||
722 | memset(&args, 0, sizeof(args)); | |
6f7194a1 MW |
723 | ret = __acpi_node_get_property_reference(fwnode, propname, index, 3, |
724 | &args); | |
504a3374 RW |
725 | if (ret) { |
726 | struct acpi_device *adev = to_acpi_device_node(fwnode); | |
d079524a | 727 | |
504a3374 RW |
728 | if (!adev) |
729 | return ret; | |
730 | ||
ce0929d2 AS |
731 | if (!acpi_get_driver_gpio_data(adev, propname, index, &args, |
732 | &quirks)) | |
504a3374 RW |
733 | return ret; |
734 | } | |
d079524a RW |
735 | /* |
736 | * The property was found and resolved, so need to lookup the GPIO based | |
737 | * on returned args. | |
738 | */ | |
977d5ad3 SA |
739 | if (!to_acpi_device_node(args.fwnode)) |
740 | return -EINVAL; | |
6f7194a1 MW |
741 | if (args.nargs != 3) |
742 | return -EPROTO; | |
743 | ||
744 | lookup->index = args.args[0]; | |
745 | lookup->pin_index = args.args[1]; | |
746 | lookup->active_low = !!args.args[2]; | |
747 | ||
977d5ad3 | 748 | lookup->info.adev = to_acpi_device_node(args.fwnode); |
ce0929d2 | 749 | lookup->info.quirks = quirks; |
977d5ad3 | 750 | |
d079524a RW |
751 | return 0; |
752 | } | |
753 | ||
12028d2d | 754 | /** |
936e15dd | 755 | * acpi_get_gpiod_by_index() - get a GPIO descriptor from device resources |
0d9a693c MW |
756 | * @adev: pointer to a ACPI device to get GPIO from |
757 | * @propname: Property name of the GPIO (optional) | |
12028d2d MW |
758 | * @index: index of GpioIo/GpioInt resource (starting from %0) |
759 | * @info: info pointer to fill in (optional) | |
760 | * | |
0d9a693c | 761 | * Function goes through ACPI resources for @adev and based on @index looks |
936e15dd | 762 | * up a GpioIo/GpioInt resource, translates it to the Linux GPIO descriptor, |
12028d2d MW |
763 | * and returns it. @index matches GpioIo/GpioInt resources only so if there |
764 | * are total %3 GPIO resources, the index goes from %0 to %2. | |
765 | * | |
0d9a693c MW |
766 | * If @propname is specified the GPIO is looked using device property. In |
767 | * that case @index is used to select the GPIO entry in the property value | |
768 | * (in case of multiple). | |
769 | * | |
85edcd01 | 770 | * If the GPIO cannot be translated or there is an error, an ERR_PTR is |
12028d2d MW |
771 | * returned. |
772 | * | |
773 | * Note: if the GPIO resource has multiple entries in the pin list, this | |
774 | * function only returns the first. | |
775 | */ | |
031ba28a | 776 | static struct gpio_desc *acpi_get_gpiod_by_index(struct acpi_device *adev, |
0d9a693c | 777 | const char *propname, int index, |
936e15dd | 778 | struct acpi_gpio_info *info) |
12028d2d MW |
779 | { |
780 | struct acpi_gpio_lookup lookup; | |
12028d2d MW |
781 | int ret; |
782 | ||
0d9a693c | 783 | if (!adev) |
936e15dd | 784 | return ERR_PTR(-ENODEV); |
12028d2d MW |
785 | |
786 | memset(&lookup, 0, sizeof(lookup)); | |
787 | lookup.index = index; | |
12028d2d | 788 | |
0d9a693c | 789 | if (propname) { |
0d9a693c MW |
790 | dev_dbg(&adev->dev, "GPIO: looking up %s\n", propname); |
791 | ||
504a3374 RW |
792 | ret = acpi_gpio_property_lookup(acpi_fwnode_handle(adev), |
793 | propname, index, &lookup); | |
d079524a RW |
794 | if (ret) |
795 | return ERR_PTR(ret); | |
0d9a693c | 796 | |
d079524a | 797 | dev_dbg(&adev->dev, "GPIO: _DSD returned %s %d %d %u\n", |
5870cff4 | 798 | dev_name(&lookup.info.adev->dev), lookup.index, |
d079524a | 799 | lookup.pin_index, lookup.active_low); |
0d9a693c MW |
800 | } else { |
801 | dev_dbg(&adev->dev, "GPIO: looking up %d in _CRS\n", index); | |
5870cff4 | 802 | lookup.info.adev = adev; |
0d9a693c MW |
803 | } |
804 | ||
d079524a RW |
805 | ret = acpi_gpio_resource_lookup(&lookup, info); |
806 | return ret ? ERR_PTR(ret) : lookup.desc; | |
12028d2d | 807 | } |
664e3e5a | 808 | |
4f78d91c DT |
809 | static bool acpi_can_fallback_to_crs(struct acpi_device *adev, |
810 | const char *con_id) | |
811 | { | |
812 | /* Never allow fallback if the device has properties */ | |
813 | if (acpi_dev_has_props(adev) || adev->driver_gpios) | |
814 | return false; | |
815 | ||
816 | return con_id == NULL; | |
817 | } | |
818 | ||
031ba28a LW |
819 | struct gpio_desc *acpi_find_gpio(struct device *dev, |
820 | const char *con_id, | |
821 | unsigned int idx, | |
a31f5c3a | 822 | enum gpiod_flags *dflags, |
fed7026a | 823 | unsigned long *lookupflags) |
031ba28a LW |
824 | { |
825 | struct acpi_device *adev = ACPI_COMPANION(dev); | |
826 | struct acpi_gpio_info info; | |
827 | struct gpio_desc *desc; | |
828 | char propname[32]; | |
829 | int i; | |
830 | ||
831 | /* Try first from _DSD */ | |
832 | for (i = 0; i < ARRAY_SIZE(gpio_suffixes); i++) { | |
9e66504a | 833 | if (con_id) { |
031ba28a LW |
834 | snprintf(propname, sizeof(propname), "%s-%s", |
835 | con_id, gpio_suffixes[i]); | |
836 | } else { | |
837 | snprintf(propname, sizeof(propname), "%s", | |
838 | gpio_suffixes[i]); | |
839 | } | |
840 | ||
841 | desc = acpi_get_gpiod_by_index(adev, propname, idx, &info); | |
693bdaa1 | 842 | if (!IS_ERR(desc)) |
031ba28a | 843 | break; |
693bdaa1 DT |
844 | if (PTR_ERR(desc) == -EPROBE_DEFER) |
845 | return ERR_CAST(desc); | |
031ba28a LW |
846 | } |
847 | ||
848 | /* Then from plain _CRS GPIOs */ | |
849 | if (IS_ERR(desc)) { | |
850 | if (!acpi_can_fallback_to_crs(adev, con_id)) | |
851 | return ERR_PTR(-ENOENT); | |
852 | ||
853 | desc = acpi_get_gpiod_by_index(adev, NULL, idx, &info); | |
854 | if (IS_ERR(desc)) | |
855 | return desc; | |
fe06b56c | 856 | } |
031ba28a | 857 | |
fe06b56c | 858 | if (info.gpioint && |
a31f5c3a | 859 | (*dflags == GPIOD_OUT_LOW || *dflags == GPIOD_OUT_HIGH)) { |
fe06b56c AS |
860 | dev_dbg(dev, "refusing GpioInt() entry when doing GPIOD_OUT_* lookup\n"); |
861 | return ERR_PTR(-ENOENT); | |
031ba28a LW |
862 | } |
863 | ||
5c34b6c1 | 864 | acpi_gpio_update_gpiod_flags(dflags, &info); |
606be344 | 865 | acpi_gpio_update_gpiod_lookup_flags(lookupflags, &info); |
031ba28a LW |
866 | return desc; |
867 | } | |
868 | ||
504a3374 RW |
869 | /** |
870 | * acpi_node_get_gpiod() - get a GPIO descriptor from ACPI resources | |
871 | * @fwnode: pointer to an ACPI firmware node to get the GPIO information from | |
872 | * @propname: Property name of the GPIO | |
873 | * @index: index of GpioIo/GpioInt resource (starting from %0) | |
874 | * @info: info pointer to fill in (optional) | |
875 | * | |
85edcd01 AS |
876 | * If @fwnode is an ACPI device object, call acpi_get_gpiod_by_index() for it. |
877 | * Otherwise (i.e. it is a data-only non-device object), use the property-based | |
504a3374 RW |
878 | * GPIO lookup to get to the GPIO resource with the relevant information and use |
879 | * that to obtain the GPIO descriptor to return. | |
85edcd01 AS |
880 | * |
881 | * If the GPIO cannot be translated or there is an error an ERR_PTR is | |
882 | * returned. | |
504a3374 RW |
883 | */ |
884 | struct gpio_desc *acpi_node_get_gpiod(struct fwnode_handle *fwnode, | |
885 | const char *propname, int index, | |
886 | struct acpi_gpio_info *info) | |
887 | { | |
888 | struct acpi_gpio_lookup lookup; | |
889 | struct acpi_device *adev; | |
890 | int ret; | |
12028d2d | 891 | |
504a3374 RW |
892 | adev = to_acpi_device_node(fwnode); |
893 | if (adev) | |
894 | return acpi_get_gpiod_by_index(adev, propname, index, info); | |
12028d2d | 895 | |
504a3374 RW |
896 | if (!is_acpi_data_node(fwnode)) |
897 | return ERR_PTR(-ENODEV); | |
898 | ||
899 | if (!propname) | |
900 | return ERR_PTR(-EINVAL); | |
901 | ||
902 | memset(&lookup, 0, sizeof(lookup)); | |
903 | lookup.index = index; | |
904 | ||
905 | ret = acpi_gpio_property_lookup(fwnode, propname, index, &lookup); | |
906 | if (ret) | |
907 | return ERR_PTR(ret); | |
12028d2d | 908 | |
504a3374 RW |
909 | ret = acpi_gpio_resource_lookup(&lookup, info); |
910 | return ret ? ERR_PTR(ret) : lookup.desc; | |
12028d2d | 911 | } |
664e3e5a | 912 | |
c884fbd4 MW |
913 | /** |
914 | * acpi_dev_gpio_irq_get() - Find GpioInt and translate it to Linux IRQ number | |
915 | * @adev: pointer to a ACPI device to get IRQ from | |
916 | * @index: index of GpioInt resource (starting from %0) | |
917 | * | |
918 | * If the device has one or more GpioInt resources, this function can be | |
919 | * used to translate from the GPIO offset in the resource to the Linux IRQ | |
920 | * number. | |
921 | * | |
a31f5c3a AS |
922 | * The function is idempotent, though each time it runs it will configure GPIO |
923 | * pin direction according to the flags in GpioInt resource. | |
924 | * | |
db05c7ef | 925 | * Return: Linux IRQ number (> %0) on success, negative errno on failure. |
c884fbd4 MW |
926 | */ |
927 | int acpi_dev_gpio_irq_get(struct acpi_device *adev, int index) | |
928 | { | |
929 | int idx, i; | |
52044723 | 930 | unsigned int irq_flags; |
a31f5c3a | 931 | int ret; |
c884fbd4 MW |
932 | |
933 | for (i = 0, idx = 0; idx <= index; i++) { | |
934 | struct acpi_gpio_info info; | |
935 | struct gpio_desc *desc; | |
936 | ||
937 | desc = acpi_get_gpiod_by_index(adev, NULL, i, &info); | |
6798d727 HG |
938 | |
939 | /* Ignore -EPROBE_DEFER, it only matters if idx matches */ | |
940 | if (IS_ERR(desc) && PTR_ERR(desc) != -EPROBE_DEFER) | |
941 | return PTR_ERR(desc); | |
942 | ||
52044723 | 943 | if (info.gpioint && idx++ == index) { |
2d6c06f5 | 944 | unsigned long lflags = GPIO_LOOKUP_FLAGS_DEFAULT; |
a31f5c3a | 945 | char label[32]; |
6798d727 | 946 | int irq; |
52044723 | 947 | |
6798d727 HG |
948 | if (IS_ERR(desc)) |
949 | return PTR_ERR(desc); | |
52044723 | 950 | |
6798d727 | 951 | irq = gpiod_to_irq(desc); |
52044723 CR |
952 | if (irq < 0) |
953 | return irq; | |
954 | ||
a31f5c3a | 955 | snprintf(label, sizeof(label), "GpioInt() %d", index); |
2d6c06f5 | 956 | ret = gpiod_configure_flags(desc, label, lflags, info.flags); |
a31f5c3a AS |
957 | if (ret < 0) |
958 | return ret; | |
959 | ||
52044723 CR |
960 | irq_flags = acpi_dev_get_irq_type(info.triggering, |
961 | info.polarity); | |
962 | ||
963 | /* Set type if specified and different than the current one */ | |
964 | if (irq_flags != IRQ_TYPE_NONE && | |
965 | irq_flags != irq_get_trigger_type(irq)) | |
966 | irq_set_irq_type(irq, irq_flags); | |
967 | ||
968 | return irq; | |
969 | } | |
970 | ||
c884fbd4 | 971 | } |
6798d727 | 972 | return -ENOENT; |
c884fbd4 MW |
973 | } |
974 | EXPORT_SYMBOL_GPL(acpi_dev_gpio_irq_get); | |
975 | ||
473ed7be MW |
976 | static acpi_status |
977 | acpi_gpio_adr_space_handler(u32 function, acpi_physical_address address, | |
978 | u32 bits, u64 *value, void *handler_context, | |
979 | void *region_context) | |
980 | { | |
981 | struct acpi_gpio_chip *achip = region_context; | |
982 | struct gpio_chip *chip = achip->chip; | |
983 | struct acpi_resource_gpio *agpio; | |
984 | struct acpi_resource *ares; | |
c15d821d | 985 | int pin_index = (int)address; |
473ed7be | 986 | acpi_status status; |
c15d821d | 987 | int length; |
473ed7be MW |
988 | int i; |
989 | ||
990 | status = acpi_buffer_to_resource(achip->conn_info.connection, | |
991 | achip->conn_info.length, &ares); | |
992 | if (ACPI_FAILURE(status)) | |
993 | return status; | |
994 | ||
995 | if (WARN_ON(ares->type != ACPI_RESOURCE_TYPE_GPIO)) { | |
996 | ACPI_FREE(ares); | |
997 | return AE_BAD_PARAMETER; | |
998 | } | |
999 | ||
1000 | agpio = &ares->data.gpio; | |
473ed7be MW |
1001 | |
1002 | if (WARN_ON(agpio->io_restriction == ACPI_IO_RESTRICT_INPUT && | |
1003 | function == ACPI_WRITE)) { | |
1004 | ACPI_FREE(ares); | |
1005 | return AE_BAD_PARAMETER; | |
1006 | } | |
1007 | ||
c15d821d SP |
1008 | length = min(agpio->pin_table_length, (u16)(pin_index + bits)); |
1009 | for (i = pin_index; i < length; ++i) { | |
a4811622 | 1010 | int pin = agpio->pin_table[i]; |
473ed7be MW |
1011 | struct acpi_gpio_connection *conn; |
1012 | struct gpio_desc *desc; | |
1013 | bool found; | |
1014 | ||
473ed7be MW |
1015 | mutex_lock(&achip->conn_lock); |
1016 | ||
1017 | found = false; | |
1018 | list_for_each_entry(conn, &achip->conns, node) { | |
e46cf32c | 1019 | if (conn->pin == pin) { |
473ed7be | 1020 | found = true; |
e46cf32c | 1021 | desc = conn->desc; |
473ed7be MW |
1022 | break; |
1023 | } | |
1024 | } | |
c103a10f MW |
1025 | |
1026 | /* | |
1027 | * The same GPIO can be shared between operation region and | |
1028 | * event but only if the access here is ACPI_READ. In that | |
1029 | * case we "borrow" the event GPIO instead. | |
1030 | */ | |
c163f90c | 1031 | if (!found && agpio->shareable == ACPI_SHARED && |
c103a10f MW |
1032 | function == ACPI_READ) { |
1033 | struct acpi_gpio_event *event; | |
1034 | ||
1035 | list_for_each_entry(event, &achip->events, node) { | |
1036 | if (event->pin == pin) { | |
1037 | desc = event->desc; | |
1038 | found = true; | |
1039 | break; | |
1040 | } | |
1041 | } | |
1042 | } | |
1043 | ||
473ed7be | 1044 | if (!found) { |
2eca25af AS |
1045 | enum gpiod_flags flags = acpi_gpio_to_gpiod_flags(agpio); |
1046 | const char *label = "ACPI:OpRegion"; | |
2eca25af | 1047 | |
21abf103 | 1048 | desc = gpiochip_request_own_desc(chip, pin, label, |
5923ea6c | 1049 | GPIO_ACTIVE_HIGH, |
21abf103 | 1050 | flags); |
e46cf32c | 1051 | if (IS_ERR(desc)) { |
473ed7be MW |
1052 | status = AE_ERROR; |
1053 | mutex_unlock(&achip->conn_lock); | |
1054 | goto out; | |
1055 | } | |
1056 | ||
473ed7be MW |
1057 | conn = kzalloc(sizeof(*conn), GFP_KERNEL); |
1058 | if (!conn) { | |
1059 | status = AE_NO_MEMORY; | |
1060 | gpiochip_free_own_desc(desc); | |
1061 | mutex_unlock(&achip->conn_lock); | |
1062 | goto out; | |
1063 | } | |
1064 | ||
e46cf32c | 1065 | conn->pin = pin; |
473ed7be MW |
1066 | conn->desc = desc; |
1067 | list_add_tail(&conn->node, &achip->conns); | |
1068 | } | |
1069 | ||
1070 | mutex_unlock(&achip->conn_lock); | |
1071 | ||
1072 | if (function == ACPI_WRITE) | |
dc62b56a AL |
1073 | gpiod_set_raw_value_cansleep(desc, |
1074 | !!((1 << i) & *value)); | |
473ed7be | 1075 | else |
dc62b56a | 1076 | *value |= (u64)gpiod_get_raw_value_cansleep(desc) << i; |
473ed7be MW |
1077 | } |
1078 | ||
1079 | out: | |
1080 | ACPI_FREE(ares); | |
1081 | return status; | |
1082 | } | |
1083 | ||
1084 | static void acpi_gpiochip_request_regions(struct acpi_gpio_chip *achip) | |
1085 | { | |
1086 | struct gpio_chip *chip = achip->chip; | |
58383c78 | 1087 | acpi_handle handle = ACPI_HANDLE(chip->parent); |
473ed7be MW |
1088 | acpi_status status; |
1089 | ||
1090 | INIT_LIST_HEAD(&achip->conns); | |
1091 | mutex_init(&achip->conn_lock); | |
1092 | status = acpi_install_address_space_handler(handle, ACPI_ADR_SPACE_GPIO, | |
1093 | acpi_gpio_adr_space_handler, | |
1094 | NULL, achip); | |
1095 | if (ACPI_FAILURE(status)) | |
58383c78 LW |
1096 | dev_err(chip->parent, |
1097 | "Failed to install GPIO OpRegion handler\n"); | |
473ed7be MW |
1098 | } |
1099 | ||
1100 | static void acpi_gpiochip_free_regions(struct acpi_gpio_chip *achip) | |
1101 | { | |
1102 | struct gpio_chip *chip = achip->chip; | |
58383c78 | 1103 | acpi_handle handle = ACPI_HANDLE(chip->parent); |
473ed7be MW |
1104 | struct acpi_gpio_connection *conn, *tmp; |
1105 | acpi_status status; | |
1106 | ||
1107 | status = acpi_remove_address_space_handler(handle, ACPI_ADR_SPACE_GPIO, | |
1108 | acpi_gpio_adr_space_handler); | |
1109 | if (ACPI_FAILURE(status)) { | |
58383c78 LW |
1110 | dev_err(chip->parent, |
1111 | "Failed to remove GPIO OpRegion handler\n"); | |
473ed7be MW |
1112 | return; |
1113 | } | |
1114 | ||
1115 | list_for_each_entry_safe_reverse(conn, tmp, &achip->conns, node) { | |
1116 | gpiochip_free_own_desc(conn->desc); | |
1117 | list_del(&conn->node); | |
1118 | kfree(conn); | |
1119 | } | |
1120 | } | |
1121 | ||
fed7026a AS |
1122 | static struct gpio_desc * |
1123 | acpi_gpiochip_parse_own_gpio(struct acpi_gpio_chip *achip, | |
1124 | struct fwnode_handle *fwnode, | |
1125 | const char **name, | |
1126 | unsigned long *lflags, | |
80c8d927 | 1127 | enum gpiod_flags *dflags) |
c80f1ba7 MW |
1128 | { |
1129 | struct gpio_chip *chip = achip->chip; | |
1130 | struct gpio_desc *desc; | |
1131 | u32 gpios[2]; | |
1132 | int ret; | |
1133 | ||
2d6c06f5 | 1134 | *lflags = GPIO_LOOKUP_FLAGS_DEFAULT; |
c82064f2 AB |
1135 | *dflags = 0; |
1136 | *name = NULL; | |
1137 | ||
c80f1ba7 MW |
1138 | ret = fwnode_property_read_u32_array(fwnode, "gpios", gpios, |
1139 | ARRAY_SIZE(gpios)); | |
1140 | if (ret < 0) | |
1141 | return ERR_PTR(ret); | |
1142 | ||
03c4749d | 1143 | desc = gpiochip_get_desc(chip, gpios[0]); |
c80f1ba7 MW |
1144 | if (IS_ERR(desc)) |
1145 | return desc; | |
1146 | ||
c80f1ba7 MW |
1147 | if (gpios[1]) |
1148 | *lflags |= GPIO_ACTIVE_LOW; | |
1149 | ||
1150 | if (fwnode_property_present(fwnode, "input")) | |
1151 | *dflags |= GPIOD_IN; | |
1152 | else if (fwnode_property_present(fwnode, "output-low")) | |
1153 | *dflags |= GPIOD_OUT_LOW; | |
1154 | else if (fwnode_property_present(fwnode, "output-high")) | |
1155 | *dflags |= GPIOD_OUT_HIGH; | |
1156 | else | |
1157 | return ERR_PTR(-EINVAL); | |
1158 | ||
1159 | fwnode_property_read_string(fwnode, "line-name", name); | |
1160 | ||
1161 | return desc; | |
1162 | } | |
1163 | ||
1164 | static void acpi_gpiochip_scan_gpios(struct acpi_gpio_chip *achip) | |
1165 | { | |
1166 | struct gpio_chip *chip = achip->chip; | |
1167 | struct fwnode_handle *fwnode; | |
1168 | ||
1169 | device_for_each_child_node(chip->parent, fwnode) { | |
fed7026a | 1170 | unsigned long lflags; |
80c8d927 | 1171 | enum gpiod_flags dflags; |
c80f1ba7 MW |
1172 | struct gpio_desc *desc; |
1173 | const char *name; | |
1174 | int ret; | |
1175 | ||
1176 | if (!fwnode_property_present(fwnode, "gpio-hog")) | |
1177 | continue; | |
1178 | ||
1179 | desc = acpi_gpiochip_parse_own_gpio(achip, fwnode, &name, | |
1180 | &lflags, &dflags); | |
1181 | if (IS_ERR(desc)) | |
1182 | continue; | |
1183 | ||
1184 | ret = gpiod_hog(desc, name, lflags, dflags); | |
1185 | if (ret) { | |
1186 | dev_err(chip->parent, "Failed to hog GPIO\n"); | |
1b6998c9 | 1187 | fwnode_handle_put(fwnode); |
c80f1ba7 MW |
1188 | return; |
1189 | } | |
1190 | } | |
1191 | } | |
1192 | ||
664e3e5a MW |
1193 | void acpi_gpiochip_add(struct gpio_chip *chip) |
1194 | { | |
aa92b6f6 MW |
1195 | struct acpi_gpio_chip *acpi_gpio; |
1196 | acpi_handle handle; | |
1197 | acpi_status status; | |
1198 | ||
58383c78 | 1199 | if (!chip || !chip->parent) |
e9595f84 MW |
1200 | return; |
1201 | ||
58383c78 | 1202 | handle = ACPI_HANDLE(chip->parent); |
aa92b6f6 MW |
1203 | if (!handle) |
1204 | return; | |
1205 | ||
1206 | acpi_gpio = kzalloc(sizeof(*acpi_gpio), GFP_KERNEL); | |
1207 | if (!acpi_gpio) { | |
58383c78 | 1208 | dev_err(chip->parent, |
aa92b6f6 MW |
1209 | "Failed to allocate memory for ACPI GPIO chip\n"); |
1210 | return; | |
1211 | } | |
1212 | ||
1213 | acpi_gpio->chip = chip; | |
c103a10f | 1214 | INIT_LIST_HEAD(&acpi_gpio->events); |
78d3a92e | 1215 | INIT_LIST_HEAD(&acpi_gpio->deferred_req_irqs_list_entry); |
aa92b6f6 MW |
1216 | |
1217 | status = acpi_attach_data(handle, acpi_gpio_chip_dh, acpi_gpio); | |
1218 | if (ACPI_FAILURE(status)) { | |
58383c78 | 1219 | dev_err(chip->parent, "Failed to attach ACPI GPIO chip\n"); |
aa92b6f6 MW |
1220 | kfree(acpi_gpio); |
1221 | return; | |
1222 | } | |
1223 | ||
4035cc15 | 1224 | if (!chip->names) |
82270335 | 1225 | devprop_gpiochip_set_names(chip, dev_fwnode(chip->parent)); |
4035cc15 | 1226 | |
473ed7be | 1227 | acpi_gpiochip_request_regions(acpi_gpio); |
c80f1ba7 | 1228 | acpi_gpiochip_scan_gpios(acpi_gpio); |
3f86a635 | 1229 | acpi_walk_dep_device_list(handle); |
664e3e5a MW |
1230 | } |
1231 | ||
1232 | void acpi_gpiochip_remove(struct gpio_chip *chip) | |
1233 | { | |
aa92b6f6 MW |
1234 | struct acpi_gpio_chip *acpi_gpio; |
1235 | acpi_handle handle; | |
1236 | acpi_status status; | |
1237 | ||
58383c78 | 1238 | if (!chip || !chip->parent) |
e9595f84 MW |
1239 | return; |
1240 | ||
58383c78 | 1241 | handle = ACPI_HANDLE(chip->parent); |
aa92b6f6 MW |
1242 | if (!handle) |
1243 | return; | |
1244 | ||
1245 | status = acpi_get_data(handle, acpi_gpio_chip_dh, (void **)&acpi_gpio); | |
1246 | if (ACPI_FAILURE(status)) { | |
58383c78 | 1247 | dev_warn(chip->parent, "Failed to retrieve ACPI GPIO chip\n"); |
aa92b6f6 MW |
1248 | return; |
1249 | } | |
1250 | ||
473ed7be | 1251 | acpi_gpiochip_free_regions(acpi_gpio); |
aa92b6f6 MW |
1252 | |
1253 | acpi_detach_data(handle, acpi_gpio_chip_dh); | |
1254 | kfree(acpi_gpio); | |
664e3e5a | 1255 | } |
66858527 | 1256 | |
6f7194a1 | 1257 | static int acpi_gpio_package_count(const union acpi_object *obj) |
66858527 RI |
1258 | { |
1259 | const union acpi_object *element = obj->package.elements; | |
1260 | const union acpi_object *end = element + obj->package.count; | |
1261 | unsigned int count = 0; | |
1262 | ||
1263 | while (element < end) { | |
6f7194a1 MW |
1264 | switch (element->type) { |
1265 | case ACPI_TYPE_LOCAL_REFERENCE: | |
1266 | element += 3; | |
df561f66 | 1267 | fallthrough; |
6f7194a1 MW |
1268 | case ACPI_TYPE_INTEGER: |
1269 | element++; | |
66858527 | 1270 | count++; |
6f7194a1 | 1271 | break; |
66858527 | 1272 | |
6f7194a1 MW |
1273 | default: |
1274 | return -EPROTO; | |
1275 | } | |
66858527 | 1276 | } |
6f7194a1 | 1277 | |
66858527 RI |
1278 | return count; |
1279 | } | |
1280 | ||
1281 | static int acpi_find_gpio_count(struct acpi_resource *ares, void *data) | |
1282 | { | |
1283 | unsigned int *count = data; | |
1284 | ||
1285 | if (ares->type == ACPI_RESOURCE_TYPE_GPIO) | |
1286 | *count += ares->data.gpio.pin_table_length; | |
1287 | ||
1288 | return 1; | |
1289 | } | |
1290 | ||
1291 | /** | |
85edcd01 AS |
1292 | * acpi_gpio_count - count the GPIOs associated with a device / function |
1293 | * @dev: GPIO consumer, can be %NULL for system-global GPIOs | |
66858527 | 1294 | * @con_id: function within the GPIO consumer |
85edcd01 AS |
1295 | * |
1296 | * Return: | |
1297 | * The number of GPIOs associated with a device / function or %-ENOENT, | |
1298 | * if no GPIO has been assigned to the requested function. | |
66858527 RI |
1299 | */ |
1300 | int acpi_gpio_count(struct device *dev, const char *con_id) | |
1301 | { | |
1302 | struct acpi_device *adev = ACPI_COMPANION(dev); | |
1303 | const union acpi_object *obj; | |
1304 | const struct acpi_gpio_mapping *gm; | |
1305 | int count = -ENOENT; | |
1306 | int ret; | |
1307 | char propname[32]; | |
1308 | unsigned int i; | |
1309 | ||
1310 | /* Try first from _DSD */ | |
1311 | for (i = 0; i < ARRAY_SIZE(gpio_suffixes); i++) { | |
9e66504a | 1312 | if (con_id) |
66858527 RI |
1313 | snprintf(propname, sizeof(propname), "%s-%s", |
1314 | con_id, gpio_suffixes[i]); | |
1315 | else | |
1316 | snprintf(propname, sizeof(propname), "%s", | |
1317 | gpio_suffixes[i]); | |
1318 | ||
1319 | ret = acpi_dev_get_property(adev, propname, ACPI_TYPE_ANY, | |
1320 | &obj); | |
1321 | if (ret == 0) { | |
1322 | if (obj->type == ACPI_TYPE_LOCAL_REFERENCE) | |
1323 | count = 1; | |
1324 | else if (obj->type == ACPI_TYPE_PACKAGE) | |
1325 | count = acpi_gpio_package_count(obj); | |
1326 | } else if (adev->driver_gpios) { | |
1327 | for (gm = adev->driver_gpios; gm->name; gm++) | |
1328 | if (strcmp(propname, gm->name) == 0) { | |
1329 | count = gm->size; | |
1330 | break; | |
1331 | } | |
1332 | } | |
4ed55016 | 1333 | if (count > 0) |
66858527 RI |
1334 | break; |
1335 | } | |
1336 | ||
1337 | /* Then from plain _CRS GPIOs */ | |
1338 | if (count < 0) { | |
1339 | struct list_head resource_list; | |
1340 | unsigned int crs_count = 0; | |
1341 | ||
6fe9da42 AS |
1342 | if (!acpi_can_fallback_to_crs(adev, con_id)) |
1343 | return count; | |
1344 | ||
66858527 RI |
1345 | INIT_LIST_HEAD(&resource_list); |
1346 | acpi_dev_get_resources(adev, &resource_list, | |
1347 | acpi_find_gpio_count, &crs_count); | |
1348 | acpi_dev_free_resource_list(&resource_list); | |
1349 | if (crs_count > 0) | |
1350 | count = crs_count; | |
1351 | } | |
4ed55016 | 1352 | return count ? count : -ENOENT; |
66858527 | 1353 | } |
10cf4899 | 1354 | |
e59f5e08 | 1355 | /* Run deferred acpi_gpiochip_request_irqs() */ |
04fd1ca7 | 1356 | static int __init acpi_gpio_handle_deferred_request_irqs(void) |
ca876c74 | 1357 | { |
78d3a92e HG |
1358 | struct acpi_gpio_chip *acpi_gpio, *tmp; |
1359 | ||
1360 | mutex_lock(&acpi_gpio_deferred_req_irqs_lock); | |
1361 | list_for_each_entry_safe(acpi_gpio, tmp, | |
1362 | &acpi_gpio_deferred_req_irqs_list, | |
e59f5e08 HG |
1363 | deferred_req_irqs_list_entry) |
1364 | acpi_gpiochip_request_irqs(acpi_gpio); | |
78d3a92e HG |
1365 | |
1366 | acpi_gpio_deferred_req_irqs_done = true; | |
1367 | mutex_unlock(&acpi_gpio_deferred_req_irqs_lock); | |
ca876c74 BT |
1368 | |
1369 | return 0; | |
1370 | } | |
1371 | /* We must use _sync so that this runs after the first deferred_probe run */ | |
e59f5e08 | 1372 | late_initcall_sync(acpi_gpio_handle_deferred_request_irqs); |
61f7f7c8 | 1373 | |
04fd1ca7 | 1374 | static const struct dmi_system_id gpiolib_acpi_quirks[] __initconst = { |
61f7f7c8 | 1375 | { |
2727315d HG |
1376 | /* |
1377 | * The Minix Neo Z83-4 has a micro-USB-B id-pin handler for | |
1378 | * a non existing micro-USB-B connector which puts the HDMI | |
1379 | * DDC pins in GPIO mode, breaking HDMI support. | |
1380 | */ | |
61f7f7c8 HG |
1381 | .matches = { |
1382 | DMI_MATCH(DMI_SYS_VENDOR, "MINIX"), | |
1383 | DMI_MATCH(DMI_PRODUCT_NAME, "Z83-4"), | |
1ad1b540 | 1384 | }, |
2ccb21f5 HG |
1385 | .driver_data = &(struct acpi_gpiolib_dmi_quirk) { |
1386 | .no_edge_events_on_boot = true, | |
1387 | }, | |
61f7f7c8 | 1388 | }, |
2727315d HG |
1389 | { |
1390 | /* | |
1391 | * The Terra Pad 1061 has a micro-USB-B id-pin handler, which | |
1392 | * instead of controlling the actual micro-USB-B turns the 5V | |
1393 | * boost for its USB-A connector off. The actual micro-USB-B | |
1394 | * connector is wired for charging only. | |
1395 | */ | |
1396 | .matches = { | |
1397 | DMI_MATCH(DMI_SYS_VENDOR, "Wortmann_AG"), | |
1398 | DMI_MATCH(DMI_PRODUCT_NAME, "TERRA_PAD_1061"), | |
1ad1b540 | 1399 | }, |
2ccb21f5 HG |
1400 | .driver_data = &(struct acpi_gpiolib_dmi_quirk) { |
1401 | .no_edge_events_on_boot = true, | |
1402 | }, | |
2727315d | 1403 | }, |
aa23ca3d HG |
1404 | { |
1405 | /* | |
efaa87fa HG |
1406 | * HP X2 10 models with Cherry Trail SoC + TI PMIC use an |
1407 | * external embedded-controller connected via I2C + an ACPI GPIO | |
1408 | * event handler on INT33FF:01 pin 0, causing spurious wakeups. | |
1409 | * When suspending by closing the LID, the power to the USB | |
1410 | * keyboard is turned off, causing INT0002 ACPI events to | |
1411 | * trigger once the XHCI controller notices the keyboard is | |
1412 | * gone. So INT0002 events cause spurious wakeups too. Ignoring | |
1413 | * EC wakes breaks wakeup when opening the lid, the user needs | |
aa23ca3d HG |
1414 | * to press the power-button to wakeup the system. The |
1415 | * alternative is suspend simply not working, which is worse. | |
1416 | */ | |
1417 | .matches = { | |
1418 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
1419 | DMI_MATCH(DMI_PRODUCT_NAME, "HP x2 Detachable 10-p0XX"), | |
1420 | }, | |
2ccb21f5 HG |
1421 | .driver_data = &(struct acpi_gpiolib_dmi_quirk) { |
1422 | .ignore_wake = "INT33FF:01@0,INT0002:00@2", | |
1423 | }, | |
aa23ca3d | 1424 | }, |
0e91506b HG |
1425 | { |
1426 | /* | |
1427 | * HP X2 10 models with Bay Trail SoC + AXP288 PMIC use an | |
1428 | * external embedded-controller connected via I2C + an ACPI GPIO | |
1429 | * event handler on INT33FC:02 pin 28, causing spurious wakeups. | |
1430 | */ | |
1431 | .matches = { | |
1432 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
1433 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion x2 Detachable"), | |
1434 | DMI_MATCH(DMI_BOARD_NAME, "815D"), | |
1435 | }, | |
1436 | .driver_data = &(struct acpi_gpiolib_dmi_quirk) { | |
1437 | .ignore_wake = "INT33FC:02@28", | |
1438 | }, | |
1439 | }, | |
0c625ccf HG |
1440 | { |
1441 | /* | |
1442 | * HP X2 10 models with Cherry Trail SoC + AXP288 PMIC use an | |
1443 | * external embedded-controller connected via I2C + an ACPI GPIO | |
1444 | * event handler on INT33FF:01 pin 0, causing spurious wakeups. | |
1445 | */ | |
1446 | .matches = { | |
1447 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
1448 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion x2 Detachable"), | |
1449 | DMI_MATCH(DMI_BOARD_NAME, "813E"), | |
1450 | }, | |
1451 | .driver_data = &(struct acpi_gpiolib_dmi_quirk) { | |
1452 | .ignore_wake = "INT33FF:01@0", | |
1453 | }, | |
1454 | }, | |
61f7f7c8 HG |
1455 | {} /* Terminating entry */ |
1456 | }; | |
1457 | ||
04fd1ca7 | 1458 | static int __init acpi_gpio_setup_params(void) |
61f7f7c8 | 1459 | { |
2ccb21f5 | 1460 | const struct acpi_gpiolib_dmi_quirk *quirk = NULL; |
1ad1b540 | 1461 | const struct dmi_system_id *id; |
1ad1b540 HG |
1462 | |
1463 | id = dmi_first_match(gpiolib_acpi_quirks); | |
1464 | if (id) | |
2ccb21f5 | 1465 | quirk = id->driver_data; |
1ad1b540 | 1466 | |
61f7f7c8 | 1467 | if (run_edge_events_on_boot < 0) { |
2ccb21f5 | 1468 | if (quirk && quirk->no_edge_events_on_boot) |
61f7f7c8 HG |
1469 | run_edge_events_on_boot = 0; |
1470 | else | |
1471 | run_edge_events_on_boot = 1; | |
1472 | } | |
1473 | ||
2ccb21f5 HG |
1474 | if (ignore_wake == NULL && quirk && quirk->ignore_wake) |
1475 | ignore_wake = quirk->ignore_wake; | |
aa23ca3d | 1476 | |
61f7f7c8 HG |
1477 | return 0; |
1478 | } | |
1479 | ||
1480 | /* Directly after dmi_setup() which runs as core_initcall() */ | |
1481 | postcore_initcall(acpi_gpio_setup_params); |