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 | ||
380c7ba3 | 10 | #include <linux/acpi.h> |
61f7f7c8 | 11 | #include <linux/dmi.h> |
e29482e8 | 12 | #include <linux/errno.h> |
e29482e8 | 13 | #include <linux/export.h> |
0d1c28a4 | 14 | #include <linux/interrupt.h> |
380c7ba3 | 15 | #include <linux/irq.h> |
473ed7be | 16 | #include <linux/mutex.h> |
354567e6 | 17 | #include <linux/pinctrl/pinctrl.h> |
e29482e8 | 18 | |
380c7ba3 AS |
19 | #include <linux/gpio/consumer.h> |
20 | #include <linux/gpio/driver.h> | |
21 | #include <linux/gpio/machine.h> | |
22 | ||
5ccff852 | 23 | #include "gpiolib.h" |
77cb907a | 24 | #include "gpiolib-acpi.h" |
5ccff852 | 25 | |
61f7f7c8 HG |
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"); | |
30 | ||
2ccb21f5 HG |
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[,...]]"); | |
36 | ||
6b6af7bd ML |
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[,...]]"); | |
42 | ||
2ccb21f5 HG |
43 | struct acpi_gpiolib_dmi_quirk { |
44 | bool no_edge_events_on_boot; | |
45 | char *ignore_wake; | |
6b6af7bd | 46 | char *ignore_interrupt; |
2ccb21f5 | 47 | }; |
aa23ca3d | 48 | |
e59f5e08 HG |
49 | /** |
50 | * struct acpi_gpio_event - ACPI GPIO event handler data | |
51 | * | |
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 | |
85edcd01 AS |
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 | |
e59f5e08 | 58 | * @irq_is_wake: If the ACPI flags indicate the IRQ is a wakeup source |
85edcd01 AS |
59 | * @irq_requested:True if request_irq() has been done |
60 | * @desc: struct gpio_desc for the GPIO pin for this event | |
e59f5e08 | 61 | */ |
4b01a14b | 62 | struct acpi_gpio_event { |
7fc7acb9 | 63 | struct list_head node; |
4b01a14b | 64 | acpi_handle handle; |
e59f5e08 | 65 | irq_handler_t handler; |
7fc7acb9 RW |
66 | unsigned int pin; |
67 | unsigned int irq; | |
e59f5e08 HG |
68 | unsigned long irqflags; |
69 | bool irq_is_wake; | |
70 | bool irq_requested; | |
e46cf32c | 71 | struct gpio_desc *desc; |
7fc7acb9 RW |
72 | }; |
73 | ||
473ed7be MW |
74 | struct acpi_gpio_connection { |
75 | struct list_head node; | |
e46cf32c | 76 | unsigned int pin; |
473ed7be MW |
77 | struct gpio_desc *desc; |
78 | }; | |
79 | ||
aa92b6f6 | 80 | struct acpi_gpio_chip { |
473ed7be MW |
81 | /* |
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. | |
85 | */ | |
86 | struct acpi_connection_info conn_info; | |
87 | struct list_head conns; | |
88 | struct mutex conn_lock; | |
aa92b6f6 | 89 | struct gpio_chip *chip; |
4b01a14b | 90 | struct list_head events; |
78d3a92e | 91 | struct list_head deferred_req_irqs_list_entry; |
aa92b6f6 MW |
92 | }; |
93 | ||
b7452d67 DT |
94 | /** |
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 | |
105 | */ | |
106 | struct acpi_gpio_info { | |
107 | struct acpi_device *adev; | |
108 | enum gpiod_flags flags; | |
109 | bool gpioint; | |
110 | int pin_config; | |
111 | int polarity; | |
112 | int triggering; | |
113 | bool wake_capable; | |
114 | unsigned int debounce; | |
115 | unsigned int quirks; | |
116 | }; | |
117 | ||
78d3a92e | 118 | /* |
85edcd01 | 119 | * For GPIO chips which call acpi_gpiochip_request_interrupts() before late_init |
e59f5e08 | 120 | * (so builtin drivers) we register the ACPI GpioInt IRQ handlers from a |
85edcd01 AS |
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 | |
e59f5e08 | 123 | * for which the acpi_gpiochip_request_irqs() call has been deferred. |
78d3a92e HG |
124 | */ |
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; | |
ca876c74 | 128 | |
e29482e8 MN |
129 | static int acpi_gpiochip_find(struct gpio_chip *gc, void *data) |
130 | { | |
067dbc1e | 131 | return device_match_acpi_handle(&gc->gpiodev->dev, data); |
e29482e8 MN |
132 | } |
133 | ||
134 | /** | |
936e15dd | 135 | * acpi_get_gpiod() - Translate ACPI GPIO pin to GPIO descriptor usable with GPIO API |
e29482e8 MN |
136 | * @path: ACPI GPIO controller full path name, (e.g. "\\_SB.GPO1") |
137 | * @pin: ACPI GPIO pin number (0-based, controller-relative) | |
138 | * | |
f35bbf61 MW |
139 | * Return: GPIO descriptor to use with Linux generic GPIO API, or ERR_PTR |
140 | * error value. Specifically returns %-EPROBE_DEFER if the referenced GPIO | |
85edcd01 | 141 | * controller does not have GPIO chip registered at the moment. This is to |
f35bbf61 | 142 | * support probe deferral. |
e29482e8 | 143 | */ |
0c2cae09 | 144 | static struct gpio_desc *acpi_get_gpiod(char *path, unsigned int pin) |
e29482e8 MN |
145 | { |
146 | struct gpio_chip *chip; | |
147 | acpi_handle handle; | |
148 | acpi_status status; | |
149 | ||
150 | status = acpi_get_handle(NULL, path, &handle); | |
151 | if (ACPI_FAILURE(status)) | |
936e15dd | 152 | return ERR_PTR(-ENODEV); |
e29482e8 MN |
153 | |
154 | chip = gpiochip_find(handle, acpi_gpiochip_find); | |
155 | if (!chip) | |
f35bbf61 | 156 | return ERR_PTR(-EPROBE_DEFER); |
e29482e8 | 157 | |
03c4749d | 158 | return gpiochip_get_desc(chip, pin); |
e29482e8 | 159 | } |
0d1c28a4 | 160 | |
43582f29 DS |
161 | /** |
162 | * acpi_get_and_request_gpiod - Translate ACPI GPIO pin to GPIO descriptor and | |
163 | * hold a refcount to the GPIO device. | |
164 | * @path: ACPI GPIO controller full path name, (e.g. "\\_SB.GPO1") | |
165 | * @pin: ACPI GPIO pin number (0-based, controller-relative) | |
166 | * @label: Label to pass to gpiod_request() | |
167 | * | |
168 | * This function is a simple pass-through to acpi_get_gpiod(), except that | |
169 | * as it is intended for use outside of the GPIO layer (in a similar fashion to | |
170 | * gpiod_get_index() for example) it also holds a reference to the GPIO device. | |
171 | */ | |
0c2cae09 | 172 | struct gpio_desc *acpi_get_and_request_gpiod(char *path, unsigned int pin, char *label) |
43582f29 DS |
173 | { |
174 | struct gpio_desc *gpio; | |
175 | int ret; | |
176 | ||
177 | gpio = acpi_get_gpiod(path, pin); | |
178 | if (IS_ERR(gpio)) | |
179 | return gpio; | |
180 | ||
181 | ret = gpiod_request(gpio, label); | |
182 | if (ret) | |
183 | return ERR_PTR(ret); | |
184 | ||
185 | return gpio; | |
186 | } | |
187 | EXPORT_SYMBOL_GPL(acpi_get_and_request_gpiod); | |
188 | ||
0d1c28a4 MN |
189 | static irqreturn_t acpi_gpio_irq_handler(int irq, void *data) |
190 | { | |
6072b9dc | 191 | struct acpi_gpio_event *event = data; |
0d1c28a4 | 192 | |
6072b9dc | 193 | acpi_evaluate_object(event->handle, NULL, NULL, NULL); |
0d1c28a4 MN |
194 | |
195 | return IRQ_HANDLED; | |
196 | } | |
197 | ||
7fc7acb9 RW |
198 | static irqreturn_t acpi_gpio_irq_handler_evt(int irq, void *data) |
199 | { | |
4b01a14b | 200 | struct acpi_gpio_event *event = data; |
7fc7acb9 | 201 | |
4b01a14b | 202 | acpi_execute_simple_method(event->handle, NULL, event->pin); |
7fc7acb9 RW |
203 | |
204 | return IRQ_HANDLED; | |
205 | } | |
206 | ||
aa92b6f6 | 207 | static void acpi_gpio_chip_dh(acpi_handle handle, void *data) |
7fc7acb9 RW |
208 | { |
209 | /* The address of this function is used as a key. */ | |
210 | } | |
211 | ||
25e3ef89 AS |
212 | bool acpi_gpio_get_irq_resource(struct acpi_resource *ares, |
213 | struct acpi_resource_gpio **agpio) | |
214 | { | |
215 | struct acpi_resource_gpio *gpio; | |
216 | ||
217 | if (ares->type != ACPI_RESOURCE_TYPE_GPIO) | |
218 | return false; | |
219 | ||
220 | gpio = &ares->data.gpio; | |
221 | if (gpio->connection_type != ACPI_RESOURCE_GPIO_TYPE_INT) | |
222 | return false; | |
223 | ||
224 | *agpio = gpio; | |
225 | return true; | |
226 | } | |
227 | EXPORT_SYMBOL_GPL(acpi_gpio_get_irq_resource); | |
228 | ||
043d7f09 DS |
229 | /** |
230 | * acpi_gpio_get_io_resource - Fetch details of an ACPI resource if it is a GPIO | |
231 | * I/O resource or return False if not. | |
232 | * @ares: Pointer to the ACPI resource to fetch | |
233 | * @agpio: Pointer to a &struct acpi_resource_gpio to store the output pointer | |
234 | */ | |
235 | bool acpi_gpio_get_io_resource(struct acpi_resource *ares, | |
236 | struct acpi_resource_gpio **agpio) | |
237 | { | |
238 | struct acpi_resource_gpio *gpio; | |
239 | ||
240 | if (ares->type != ACPI_RESOURCE_TYPE_GPIO) | |
241 | return false; | |
242 | ||
243 | gpio = &ares->data.gpio; | |
244 | if (gpio->connection_type != ACPI_RESOURCE_GPIO_TYPE_IO) | |
245 | return false; | |
246 | ||
247 | *agpio = gpio; | |
248 | return true; | |
249 | } | |
250 | EXPORT_SYMBOL_GPL(acpi_gpio_get_io_resource); | |
251 | ||
e59f5e08 HG |
252 | static void acpi_gpiochip_request_irq(struct acpi_gpio_chip *acpi_gpio, |
253 | struct acpi_gpio_event *event) | |
254 | { | |
be3dc15f | 255 | struct device *parent = acpi_gpio->chip->parent; |
e59f5e08 HG |
256 | int ret, value; |
257 | ||
258 | ret = request_threaded_irq(event->irq, NULL, event->handler, | |
6e5d5791 | 259 | event->irqflags | IRQF_ONESHOT, "ACPI:Event", event); |
e59f5e08 | 260 | if (ret) { |
be3dc15f | 261 | dev_err(parent, "Failed to setup interrupt handler for %d\n", event->irq); |
e59f5e08 HG |
262 | return; |
263 | } | |
264 | ||
265 | if (event->irq_is_wake) | |
266 | enable_irq_wake(event->irq); | |
267 | ||
268 | event->irq_requested = true; | |
269 | ||
270 | /* Make sure we trigger the initial state of edge-triggered IRQs */ | |
61f7f7c8 HG |
271 | if (run_edge_events_on_boot && |
272 | (event->irqflags & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING))) { | |
273 | value = gpiod_get_raw_value_cansleep(event->desc); | |
274 | if (((event->irqflags & IRQF_TRIGGER_RISING) && value == 1) || | |
275 | ((event->irqflags & IRQF_TRIGGER_FALLING) && value == 0)) | |
276 | event->handler(event->irq, event); | |
277 | } | |
e59f5e08 HG |
278 | } |
279 | ||
280 | static void acpi_gpiochip_request_irqs(struct acpi_gpio_chip *acpi_gpio) | |
281 | { | |
282 | struct acpi_gpio_event *event; | |
283 | ||
284 | list_for_each_entry(event, &acpi_gpio->events, node) | |
285 | acpi_gpiochip_request_irq(acpi_gpio, event); | |
286 | } | |
287 | ||
1a81f191 | 288 | static enum gpiod_flags |
56f7058a | 289 | acpi_gpio_to_gpiod_flags(const struct acpi_resource_gpio *agpio, int polarity) |
1a81f191 | 290 | { |
bca40480 AS |
291 | /* GpioInt() implies input configuration */ |
292 | if (agpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) | |
293 | return GPIOD_IN; | |
294 | ||
1a81f191 AS |
295 | switch (agpio->io_restriction) { |
296 | case ACPI_IO_RESTRICT_INPUT: | |
297 | return GPIOD_IN; | |
298 | case ACPI_IO_RESTRICT_OUTPUT: | |
299 | /* | |
300 | * ACPI GPIO resources don't contain an initial value for the | |
301 | * GPIO. Therefore we deduce that value from the pull field | |
56f7058a VLS |
302 | * and the polarity instead. If the pin is pulled up we assume |
303 | * default to be high, if it is pulled down we assume default | |
304 | * to be low, otherwise we leave pin untouched. For active low | |
305 | * polarity values will be switched. See also | |
306 | * Documentation/firmware-guide/acpi/gpio-properties.rst. | |
1a81f191 AS |
307 | */ |
308 | switch (agpio->pin_config) { | |
309 | case ACPI_PIN_CONFIG_PULLUP: | |
56f7058a | 310 | return polarity == GPIO_ACTIVE_LOW ? GPIOD_OUT_LOW : GPIOD_OUT_HIGH; |
1a81f191 | 311 | case ACPI_PIN_CONFIG_PULLDOWN: |
56f7058a | 312 | return polarity == GPIO_ACTIVE_LOW ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW; |
1a81f191 AS |
313 | default: |
314 | break; | |
315 | } | |
40b37008 | 316 | break; |
1a81f191 AS |
317 | default: |
318 | break; | |
319 | } | |
320 | ||
321 | /* | |
322 | * Assume that the BIOS has configured the direction and pull | |
323 | * accordingly. | |
324 | */ | |
325 | return GPIOD_ASIS; | |
326 | } | |
327 | ||
2e2b496c AS |
328 | static struct gpio_desc *acpi_request_own_gpiod(struct gpio_chip *chip, |
329 | struct acpi_resource_gpio *agpio, | |
330 | unsigned int index, | |
331 | const char *label) | |
332 | { | |
333 | int polarity = GPIO_ACTIVE_HIGH; | |
334 | enum gpiod_flags flags = acpi_gpio_to_gpiod_flags(agpio, polarity); | |
335 | unsigned int pin = agpio->pin_table[index]; | |
336 | struct gpio_desc *desc; | |
337 | int ret; | |
338 | ||
339 | desc = gpiochip_request_own_desc(chip, pin, label, polarity, flags); | |
340 | if (IS_ERR(desc)) | |
341 | return desc; | |
342 | ||
660c619b AS |
343 | /* ACPI uses hundredths of milliseconds units */ |
344 | ret = gpio_set_debounce_timeout(desc, agpio->debounce_timeout * 10); | |
2e2b496c | 345 | if (ret) |
cef0d022 HG |
346 | dev_warn(chip->parent, |
347 | "Failed to set debounce-timeout for pin 0x%04X, err %d\n", | |
348 | pin, ret); | |
2e2b496c | 349 | |
cef0d022 | 350 | return desc; |
2e2b496c AS |
351 | } |
352 | ||
6b6af7bd ML |
353 | static bool acpi_gpio_in_ignore_list(const char *ignore_list, const char *controller_in, |
354 | unsigned int pin_in) | |
2ccb21f5 HG |
355 | { |
356 | const char *controller, *pin_str; | |
0c2cae09 | 357 | unsigned int pin; |
2ccb21f5 | 358 | char *endp; |
0c2cae09 | 359 | int len; |
2ccb21f5 | 360 | |
6b6af7bd | 361 | controller = ignore_list; |
2ccb21f5 HG |
362 | while (controller) { |
363 | pin_str = strchr(controller, '@'); | |
364 | if (!pin_str) | |
365 | goto err; | |
366 | ||
367 | len = pin_str - controller; | |
368 | if (len == strlen(controller_in) && | |
369 | strncmp(controller, controller_in, len) == 0) { | |
370 | pin = simple_strtoul(pin_str + 1, &endp, 10); | |
371 | if (*endp != 0 && *endp != ',') | |
372 | goto err; | |
373 | ||
374 | if (pin == pin_in) | |
375 | return true; | |
376 | } | |
377 | ||
378 | controller = strchr(controller, ','); | |
379 | if (controller) | |
380 | controller++; | |
381 | } | |
382 | ||
383 | return false; | |
384 | err: | |
6b6af7bd | 385 | pr_err_once("Error: Invalid value for gpiolib_acpi.ignore_...: %s\n", ignore_list); |
2ccb21f5 HG |
386 | return false; |
387 | } | |
388 | ||
389 | static bool acpi_gpio_irq_is_wake(struct device *parent, | |
0e3b175f | 390 | const struct acpi_resource_gpio *agpio) |
2ccb21f5 | 391 | { |
0c2cae09 | 392 | unsigned int pin = agpio->pin_table[0]; |
2ccb21f5 HG |
393 | |
394 | if (agpio->wake_capable != ACPI_WAKE_CAPABLE) | |
395 | return false; | |
396 | ||
6b6af7bd | 397 | if (acpi_gpio_in_ignore_list(ignore_wake, dev_name(parent), pin)) { |
0c2cae09 | 398 | dev_info(parent, "Ignoring wakeup on pin %u\n", pin); |
2ccb21f5 HG |
399 | return false; |
400 | } | |
401 | ||
402 | return true; | |
403 | } | |
404 | ||
d4fc46f1 | 405 | /* Always returns AE_OK so that we keep looping over the resources */ |
e59f5e08 HG |
406 | static acpi_status acpi_gpiochip_alloc_event(struct acpi_resource *ares, |
407 | void *context) | |
0d1c28a4 | 408 | { |
6072b9dc | 409 | struct acpi_gpio_chip *acpi_gpio = context; |
aa92b6f6 | 410 | struct gpio_chip *chip = acpi_gpio->chip; |
6072b9dc | 411 | struct acpi_resource_gpio *agpio; |
7fc7acb9 | 412 | acpi_handle handle, evt_handle; |
6072b9dc MW |
413 | struct acpi_gpio_event *event; |
414 | irq_handler_t handler = NULL; | |
415 | struct gpio_desc *desc; | |
0c2cae09 AS |
416 | unsigned int pin; |
417 | int ret, irq; | |
0d1c28a4 | 418 | |
25e3ef89 | 419 | if (!acpi_gpio_get_irq_resource(ares, &agpio)) |
6072b9dc | 420 | return AE_OK; |
0d1c28a4 | 421 | |
58383c78 | 422 | handle = ACPI_HANDLE(chip->parent); |
6072b9dc MW |
423 | pin = agpio->pin_table[0]; |
424 | ||
425 | if (pin <= 255) { | |
213d266e LT |
426 | char ev_name[8]; |
427 | sprintf(ev_name, "_%c%02X", | |
6072b9dc MW |
428 | agpio->triggering == ACPI_EDGE_SENSITIVE ? 'E' : 'L', |
429 | pin); | |
430 | if (ACPI_SUCCESS(acpi_get_handle(handle, ev_name, &evt_handle))) | |
431 | handler = acpi_gpio_irq_handler; | |
432 | } | |
433 | if (!handler) { | |
434 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_EVT", &evt_handle))) | |
435 | handler = acpi_gpio_irq_handler_evt; | |
436 | } | |
437 | if (!handler) | |
c06632ea | 438 | return AE_OK; |
0d1c28a4 | 439 | |
2e2b496c | 440 | desc = acpi_request_own_gpiod(chip, agpio, 0, "ACPI:Event"); |
6072b9dc | 441 | if (IS_ERR(desc)) { |
3f86a7e0 HG |
442 | dev_err(chip->parent, |
443 | "Failed to request GPIO for pin 0x%04X, err %ld\n", | |
444 | pin, PTR_ERR(desc)); | |
d4fc46f1 | 445 | return AE_OK; |
6072b9dc | 446 | } |
0d1c28a4 | 447 | |
e3a2e878 | 448 | ret = gpiochip_lock_as_irq(chip, pin); |
6072b9dc | 449 | if (ret) { |
3f86a7e0 HG |
450 | dev_err(chip->parent, |
451 | "Failed to lock GPIO pin 0x%04X as interrupt, err %d\n", | |
452 | pin, ret); | |
6072b9dc MW |
453 | goto fail_free_desc; |
454 | } | |
0d1c28a4 | 455 | |
6072b9dc MW |
456 | irq = gpiod_to_irq(desc); |
457 | if (irq < 0) { | |
3f86a7e0 HG |
458 | dev_err(chip->parent, |
459 | "Failed to translate GPIO pin 0x%04X to IRQ, err %d\n", | |
460 | pin, irq); | |
6072b9dc MW |
461 | goto fail_unlock_irq; |
462 | } | |
7fc7acb9 | 463 | |
6b6af7bd ML |
464 | if (acpi_gpio_in_ignore_list(ignore_interrupt, dev_name(chip->parent), pin)) { |
465 | dev_info(chip->parent, "Ignoring interrupt on pin %u\n", pin); | |
466 | return AE_OK; | |
467 | } | |
468 | ||
e59f5e08 HG |
469 | event = kzalloc(sizeof(*event), GFP_KERNEL); |
470 | if (!event) | |
471 | goto fail_unlock_irq; | |
472 | ||
473 | event->irqflags = IRQF_ONESHOT; | |
6072b9dc MW |
474 | if (agpio->triggering == ACPI_LEVEL_SENSITIVE) { |
475 | if (agpio->polarity == ACPI_ACTIVE_HIGH) | |
e59f5e08 | 476 | event->irqflags |= IRQF_TRIGGER_HIGH; |
6072b9dc | 477 | else |
e59f5e08 | 478 | event->irqflags |= IRQF_TRIGGER_LOW; |
6072b9dc MW |
479 | } else { |
480 | switch (agpio->polarity) { | |
481 | case ACPI_ACTIVE_HIGH: | |
e59f5e08 | 482 | event->irqflags |= IRQF_TRIGGER_RISING; |
6072b9dc MW |
483 | break; |
484 | case ACPI_ACTIVE_LOW: | |
e59f5e08 | 485 | event->irqflags |= IRQF_TRIGGER_FALLING; |
6072b9dc MW |
486 | break; |
487 | default: | |
e59f5e08 HG |
488 | event->irqflags |= IRQF_TRIGGER_RISING | |
489 | IRQF_TRIGGER_FALLING; | |
6072b9dc | 490 | break; |
7fc7acb9 | 491 | } |
6072b9dc | 492 | } |
aa92b6f6 | 493 | |
6072b9dc | 494 | event->handle = evt_handle; |
e59f5e08 | 495 | event->handler = handler; |
6072b9dc | 496 | event->irq = irq; |
2ccb21f5 | 497 | event->irq_is_wake = acpi_gpio_irq_is_wake(chip->parent, agpio); |
6072b9dc | 498 | event->pin = pin; |
e46cf32c | 499 | event->desc = desc; |
7fc7acb9 | 500 | |
6072b9dc | 501 | list_add_tail(&event->node, &acpi_gpio->events); |
ca876c74 | 502 | |
6072b9dc MW |
503 | return AE_OK; |
504 | ||
6072b9dc | 505 | fail_unlock_irq: |
e3a2e878 | 506 | gpiochip_unlock_as_irq(chip, pin); |
6072b9dc MW |
507 | fail_free_desc: |
508 | gpiochip_free_own_desc(desc); | |
509 | ||
d4fc46f1 | 510 | return AE_OK; |
0d1c28a4 | 511 | } |
7fc7acb9 | 512 | |
70b53411 | 513 | /** |
6072b9dc | 514 | * acpi_gpiochip_request_interrupts() - Register isr for gpio chip ACPI events |
afa82fab | 515 | * @chip: GPIO chip |
70b53411 | 516 | * |
6072b9dc MW |
517 | * ACPI5 platforms can use GPIO signaled ACPI events. These GPIO interrupts are |
518 | * handled by ACPI event methods which need to be called from the GPIO | |
85edcd01 AS |
519 | * chip's interrupt handler. acpi_gpiochip_request_interrupts() finds out which |
520 | * GPIO pins have ACPI event methods and assigns interrupt handlers that calls | |
521 | * the ACPI event methods for those pins. | |
6072b9dc | 522 | */ |
afa82fab | 523 | void acpi_gpiochip_request_interrupts(struct gpio_chip *chip) |
6072b9dc | 524 | { |
afa82fab MW |
525 | struct acpi_gpio_chip *acpi_gpio; |
526 | acpi_handle handle; | |
527 | acpi_status status; | |
78d3a92e | 528 | bool defer; |
afa82fab | 529 | |
58383c78 | 530 | if (!chip->parent || !chip->to_irq) |
afa82fab | 531 | return; |
6072b9dc | 532 | |
58383c78 | 533 | handle = ACPI_HANDLE(chip->parent); |
afa82fab MW |
534 | if (!handle) |
535 | return; | |
536 | ||
537 | status = acpi_get_data(handle, acpi_gpio_chip_dh, (void **)&acpi_gpio); | |
538 | if (ACPI_FAILURE(status)) | |
6072b9dc MW |
539 | return; |
540 | ||
5adc4093 HG |
541 | if (acpi_quirk_skip_gpio_event_handlers()) |
542 | return; | |
543 | ||
eac001bf | 544 | acpi_walk_resources(handle, METHOD_NAME__AEI, |
e59f5e08 HG |
545 | acpi_gpiochip_alloc_event, acpi_gpio); |
546 | ||
78d3a92e HG |
547 | mutex_lock(&acpi_gpio_deferred_req_irqs_lock); |
548 | defer = !acpi_gpio_deferred_req_irqs_done; | |
549 | if (defer) | |
550 | list_add(&acpi_gpio->deferred_req_irqs_list_entry, | |
551 | &acpi_gpio_deferred_req_irqs_list); | |
552 | mutex_unlock(&acpi_gpio_deferred_req_irqs_lock); | |
553 | ||
554 | if (defer) | |
555 | return; | |
556 | ||
e59f5e08 | 557 | acpi_gpiochip_request_irqs(acpi_gpio); |
6072b9dc | 558 | } |
2b528fff | 559 | EXPORT_SYMBOL_GPL(acpi_gpiochip_request_interrupts); |
6072b9dc MW |
560 | |
561 | /** | |
562 | * acpi_gpiochip_free_interrupts() - Free GPIO ACPI event interrupts. | |
afa82fab | 563 | * @chip: GPIO chip |
70b53411 | 564 | * |
6072b9dc MW |
565 | * Free interrupts associated with GPIO ACPI event method for the given |
566 | * GPIO chip. | |
70b53411 | 567 | */ |
afa82fab | 568 | void acpi_gpiochip_free_interrupts(struct gpio_chip *chip) |
70b53411 | 569 | { |
afa82fab | 570 | struct acpi_gpio_chip *acpi_gpio; |
4b01a14b | 571 | struct acpi_gpio_event *event, *ep; |
afa82fab MW |
572 | acpi_handle handle; |
573 | acpi_status status; | |
574 | ||
58383c78 | 575 | if (!chip->parent || !chip->to_irq) |
afa82fab | 576 | return; |
70b53411 | 577 | |
58383c78 | 578 | handle = ACPI_HANDLE(chip->parent); |
afa82fab MW |
579 | if (!handle) |
580 | return; | |
581 | ||
582 | status = acpi_get_data(handle, acpi_gpio_chip_dh, (void **)&acpi_gpio); | |
583 | if (ACPI_FAILURE(status)) | |
70b53411 MW |
584 | return; |
585 | ||
78d3a92e HG |
586 | mutex_lock(&acpi_gpio_deferred_req_irqs_lock); |
587 | if (!list_empty(&acpi_gpio->deferred_req_irqs_list_entry)) | |
588 | list_del_init(&acpi_gpio->deferred_req_irqs_list_entry); | |
589 | mutex_unlock(&acpi_gpio_deferred_req_irqs_lock); | |
590 | ||
4b01a14b | 591 | list_for_each_entry_safe_reverse(event, ep, &acpi_gpio->events, node) { |
e59f5e08 HG |
592 | if (event->irq_requested) { |
593 | if (event->irq_is_wake) | |
594 | disable_irq_wake(event->irq); | |
595 | ||
596 | free_irq(event->irq, event); | |
597 | } | |
8a146fbe | 598 | |
e3a2e878 | 599 | gpiochip_unlock_as_irq(chip, event->pin); |
86252329 | 600 | gpiochip_free_own_desc(event->desc); |
4b01a14b MW |
601 | list_del(&event->node); |
602 | kfree(event); | |
70b53411 | 603 | } |
70b53411 | 604 | } |
2b528fff | 605 | EXPORT_SYMBOL_GPL(acpi_gpiochip_free_interrupts); |
70b53411 | 606 | |
f028d524 RW |
607 | int acpi_dev_add_driver_gpios(struct acpi_device *adev, |
608 | const struct acpi_gpio_mapping *gpios) | |
609 | { | |
610 | if (adev && gpios) { | |
611 | adev->driver_gpios = gpios; | |
612 | return 0; | |
613 | } | |
614 | return -EINVAL; | |
615 | } | |
616 | EXPORT_SYMBOL_GPL(acpi_dev_add_driver_gpios); | |
617 | ||
2838bf94 AS |
618 | void acpi_dev_remove_driver_gpios(struct acpi_device *adev) |
619 | { | |
620 | if (adev) | |
621 | adev->driver_gpios = NULL; | |
622 | } | |
623 | EXPORT_SYMBOL_GPL(acpi_dev_remove_driver_gpios); | |
624 | ||
2ff64a84 | 625 | static void acpi_dev_release_driver_gpios(void *adev) |
85c73d50 | 626 | { |
2ff64a84 | 627 | acpi_dev_remove_driver_gpios(adev); |
85c73d50 AS |
628 | } |
629 | ||
630 | int devm_acpi_dev_add_driver_gpios(struct device *dev, | |
631 | const struct acpi_gpio_mapping *gpios) | |
632 | { | |
2ff64a84 | 633 | struct acpi_device *adev = ACPI_COMPANION(dev); |
85c73d50 AS |
634 | int ret; |
635 | ||
2ff64a84 AS |
636 | ret = acpi_dev_add_driver_gpios(adev, gpios); |
637 | if (ret) | |
85c73d50 | 638 | return ret; |
2ff64a84 AS |
639 | |
640 | return devm_add_action_or_reset(dev, acpi_dev_release_driver_gpios, adev); | |
85c73d50 AS |
641 | } |
642 | EXPORT_SYMBOL_GPL(devm_acpi_dev_add_driver_gpios); | |
643 | ||
f028d524 RW |
644 | static bool acpi_get_driver_gpio_data(struct acpi_device *adev, |
645 | const char *name, int index, | |
977d5ad3 | 646 | struct fwnode_reference_args *args, |
ce0929d2 | 647 | unsigned int *quirks) |
f028d524 RW |
648 | { |
649 | const struct acpi_gpio_mapping *gm; | |
650 | ||
af3b462a | 651 | if (!adev || !adev->driver_gpios) |
f028d524 RW |
652 | return false; |
653 | ||
654 | for (gm = adev->driver_gpios; gm->name; gm++) | |
655 | if (!strcmp(name, gm->name) && gm->data && index < gm->size) { | |
656 | const struct acpi_gpio_params *par = gm->data + index; | |
657 | ||
977d5ad3 | 658 | args->fwnode = acpi_fwnode_handle(adev); |
f028d524 RW |
659 | args->args[0] = par->crs_entry_index; |
660 | args->args[1] = par->line_index; | |
661 | args->args[2] = par->active_low; | |
662 | args->nargs = 3; | |
ce0929d2 AS |
663 | |
664 | *quirks = gm->quirks; | |
f028d524 RW |
665 | return true; |
666 | } | |
667 | ||
668 | return false; | |
669 | } | |
670 | ||
5c34b6c1 AS |
671 | static int |
672 | __acpi_gpio_update_gpiod_flags(enum gpiod_flags *flags, enum gpiod_flags update) | |
a31f5c3a | 673 | { |
72893f0c HG |
674 | const enum gpiod_flags mask = |
675 | GPIOD_FLAGS_BIT_DIR_SET | GPIOD_FLAGS_BIT_DIR_OUT | | |
676 | GPIOD_FLAGS_BIT_DIR_VAL; | |
a31f5c3a AS |
677 | int ret = 0; |
678 | ||
679 | /* | |
680 | * Check if the BIOS has IoRestriction with explicitly set direction | |
681 | * and update @flags accordingly. Otherwise use whatever caller asked | |
682 | * for. | |
683 | */ | |
684 | if (update & GPIOD_FLAGS_BIT_DIR_SET) { | |
685 | enum gpiod_flags diff = *flags ^ update; | |
686 | ||
687 | /* | |
688 | * Check if caller supplied incompatible GPIO initialization | |
689 | * flags. | |
690 | * | |
691 | * Return %-EINVAL to notify that firmware has different | |
692 | * settings and we are going to use them. | |
693 | */ | |
694 | if (((*flags & GPIOD_FLAGS_BIT_DIR_SET) && (diff & GPIOD_FLAGS_BIT_DIR_OUT)) || | |
695 | ((*flags & GPIOD_FLAGS_BIT_DIR_OUT) && (diff & GPIOD_FLAGS_BIT_DIR_VAL))) | |
696 | ret = -EINVAL; | |
72893f0c | 697 | *flags = (*flags & ~mask) | (update & mask); |
a31f5c3a AS |
698 | } |
699 | return ret; | |
700 | } | |
701 | ||
b7452d67 DT |
702 | static int acpi_gpio_update_gpiod_flags(enum gpiod_flags *flags, |
703 | struct acpi_gpio_info *info) | |
5c34b6c1 AS |
704 | { |
705 | struct device *dev = &info->adev->dev; | |
1b2ca32a | 706 | enum gpiod_flags old = *flags; |
5c34b6c1 AS |
707 | int ret; |
708 | ||
1b2ca32a AS |
709 | ret = __acpi_gpio_update_gpiod_flags(&old, info->flags); |
710 | if (info->quirks & ACPI_GPIO_QUIRK_NO_IO_RESTRICTION) { | |
711 | if (ret) | |
712 | dev_warn(dev, FW_BUG "GPIO not in correct mode, fixing\n"); | |
713 | } else { | |
714 | if (ret) | |
715 | dev_dbg(dev, "Override GPIO initialization flags\n"); | |
716 | *flags = old; | |
717 | } | |
5c34b6c1 AS |
718 | |
719 | return ret; | |
720 | } | |
721 | ||
b7452d67 DT |
722 | static int acpi_gpio_update_gpiod_lookup_flags(unsigned long *lookupflags, |
723 | struct acpi_gpio_info *info) | |
606be344 | 724 | { |
2d3b6db1 AS |
725 | switch (info->pin_config) { |
726 | case ACPI_PIN_CONFIG_PULLUP: | |
727 | *lookupflags |= GPIO_PULL_UP; | |
728 | break; | |
729 | case ACPI_PIN_CONFIG_PULLDOWN: | |
730 | *lookupflags |= GPIO_PULL_DOWN; | |
731 | break; | |
6fd03f02 NS |
732 | case ACPI_PIN_CONFIG_NOPULL: |
733 | *lookupflags |= GPIO_PULL_DISABLE; | |
734 | break; | |
2d3b6db1 AS |
735 | default: |
736 | break; | |
737 | } | |
738 | ||
606be344 AS |
739 | if (info->polarity == GPIO_ACTIVE_LOW) |
740 | *lookupflags |= GPIO_ACTIVE_LOW; | |
741 | ||
742 | return 0; | |
743 | } | |
744 | ||
12028d2d MW |
745 | struct acpi_gpio_lookup { |
746 | struct acpi_gpio_info info; | |
747 | int index; | |
74301f27 | 748 | u16 pin_index; |
d079524a | 749 | bool active_low; |
936e15dd | 750 | struct gpio_desc *desc; |
12028d2d MW |
751 | int n; |
752 | }; | |
753 | ||
031ba28a | 754 | static int acpi_populate_gpio_lookup(struct acpi_resource *ares, void *data) |
12028d2d MW |
755 | { |
756 | struct acpi_gpio_lookup *lookup = data; | |
757 | ||
758 | if (ares->type != ACPI_RESOURCE_TYPE_GPIO) | |
759 | return 1; | |
760 | ||
4d1f7a6e | 761 | if (!lookup->desc) { |
12028d2d | 762 | const struct acpi_resource_gpio *agpio = &ares->data.gpio; |
4d1f7a6e | 763 | bool gpioint = agpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT; |
62d5247d | 764 | struct gpio_desc *desc; |
74301f27 | 765 | u16 pin_index; |
0d9a693c | 766 | |
4d1f7a6e AS |
767 | if (lookup->info.quirks & ACPI_GPIO_QUIRK_ONLY_GPIOIO && gpioint) |
768 | lookup->index++; | |
769 | ||
770 | if (lookup->n++ != lookup->index) | |
771 | return 1; | |
772 | ||
773 | pin_index = lookup->pin_index; | |
0d9a693c MW |
774 | if (pin_index >= agpio->pin_table_length) |
775 | return 1; | |
12028d2d | 776 | |
62d5247d AS |
777 | if (lookup->info.quirks & ACPI_GPIO_QUIRK_ABSOLUTE_NUMBER) |
778 | desc = gpio_to_desc(agpio->pin_table[pin_index]); | |
779 | else | |
780 | desc = acpi_get_gpiod(agpio->resource_source.string_ptr, | |
0d9a693c | 781 | agpio->pin_table[pin_index]); |
62d5247d | 782 | lookup->desc = desc; |
2d3b6db1 | 783 | lookup->info.pin_config = agpio->pin_config; |
8dcb7a15 | 784 | lookup->info.debounce = agpio->debounce_timeout; |
4d1f7a6e | 785 | lookup->info.gpioint = gpioint; |
0e3b175f | 786 | lookup->info.wake_capable = acpi_gpio_irq_is_wake(&lookup->info.adev->dev, agpio); |
0d9a693c MW |
787 | |
788 | /* | |
e567c35f AS |
789 | * Polarity and triggering are only specified for GpioInt |
790 | * resource. | |
52044723 CR |
791 | * Note: we expect here: |
792 | * - ACPI_ACTIVE_LOW == GPIO_ACTIVE_LOW | |
793 | * - ACPI_ACTIVE_HIGH == GPIO_ACTIVE_HIGH | |
0d9a693c | 794 | */ |
52044723 CR |
795 | if (lookup->info.gpioint) { |
796 | lookup->info.polarity = agpio->polarity; | |
797 | lookup->info.triggering = agpio->triggering; | |
a31f5c3a | 798 | } else { |
f67a6c11 | 799 | lookup->info.polarity = lookup->active_low; |
52044723 | 800 | } |
bca40480 AS |
801 | |
802 | lookup->info.flags = acpi_gpio_to_gpiod_flags(agpio, lookup->info.polarity); | |
12028d2d MW |
803 | } |
804 | ||
805 | return 1; | |
806 | } | |
807 | ||
d079524a RW |
808 | static int acpi_gpio_resource_lookup(struct acpi_gpio_lookup *lookup, |
809 | struct acpi_gpio_info *info) | |
810 | { | |
5870cff4 | 811 | struct acpi_device *adev = lookup->info.adev; |
d079524a RW |
812 | struct list_head res_list; |
813 | int ret; | |
814 | ||
815 | INIT_LIST_HEAD(&res_list); | |
816 | ||
5870cff4 | 817 | ret = acpi_dev_get_resources(adev, &res_list, |
031ba28a | 818 | acpi_populate_gpio_lookup, |
d079524a RW |
819 | lookup); |
820 | if (ret < 0) | |
821 | return ret; | |
822 | ||
823 | acpi_dev_free_resource_list(&res_list); | |
824 | ||
825 | if (!lookup->desc) | |
826 | return -ENOENT; | |
827 | ||
f67a6c11 | 828 | if (info) |
d079524a | 829 | *info = lookup->info; |
d079524a RW |
830 | return 0; |
831 | } | |
832 | ||
504a3374 | 833 | static int acpi_gpio_property_lookup(struct fwnode_handle *fwnode, |
d079524a RW |
834 | const char *propname, int index, |
835 | struct acpi_gpio_lookup *lookup) | |
836 | { | |
977d5ad3 | 837 | struct fwnode_reference_args args; |
ce0929d2 | 838 | unsigned int quirks = 0; |
d079524a RW |
839 | int ret; |
840 | ||
841 | memset(&args, 0, sizeof(args)); | |
6f7194a1 MW |
842 | ret = __acpi_node_get_property_reference(fwnode, propname, index, 3, |
843 | &args); | |
504a3374 | 844 | if (ret) { |
af3b462a | 845 | struct acpi_device *adev; |
504a3374 | 846 | |
af3b462a AS |
847 | adev = to_acpi_device_node(fwnode); |
848 | if (!acpi_get_driver_gpio_data(adev, propname, index, &args, &quirks)) | |
504a3374 RW |
849 | return ret; |
850 | } | |
d079524a RW |
851 | /* |
852 | * The property was found and resolved, so need to lookup the GPIO based | |
853 | * on returned args. | |
854 | */ | |
977d5ad3 SA |
855 | if (!to_acpi_device_node(args.fwnode)) |
856 | return -EINVAL; | |
6f7194a1 MW |
857 | if (args.nargs != 3) |
858 | return -EPROTO; | |
859 | ||
860 | lookup->index = args.args[0]; | |
861 | lookup->pin_index = args.args[1]; | |
862 | lookup->active_low = !!args.args[2]; | |
863 | ||
977d5ad3 | 864 | lookup->info.adev = to_acpi_device_node(args.fwnode); |
ce0929d2 | 865 | lookup->info.quirks = quirks; |
977d5ad3 | 866 | |
d079524a RW |
867 | return 0; |
868 | } | |
869 | ||
12028d2d | 870 | /** |
936e15dd | 871 | * acpi_get_gpiod_by_index() - get a GPIO descriptor from device resources |
0d9a693c MW |
872 | * @adev: pointer to a ACPI device to get GPIO from |
873 | * @propname: Property name of the GPIO (optional) | |
12028d2d MW |
874 | * @index: index of GpioIo/GpioInt resource (starting from %0) |
875 | * @info: info pointer to fill in (optional) | |
876 | * | |
0d9a693c | 877 | * Function goes through ACPI resources for @adev and based on @index looks |
936e15dd | 878 | * up a GpioIo/GpioInt resource, translates it to the Linux GPIO descriptor, |
12028d2d MW |
879 | * and returns it. @index matches GpioIo/GpioInt resources only so if there |
880 | * are total %3 GPIO resources, the index goes from %0 to %2. | |
881 | * | |
0d9a693c MW |
882 | * If @propname is specified the GPIO is looked using device property. In |
883 | * that case @index is used to select the GPIO entry in the property value | |
884 | * (in case of multiple). | |
885 | * | |
85edcd01 | 886 | * If the GPIO cannot be translated or there is an error, an ERR_PTR is |
12028d2d MW |
887 | * returned. |
888 | * | |
889 | * Note: if the GPIO resource has multiple entries in the pin list, this | |
890 | * function only returns the first. | |
891 | */ | |
031ba28a | 892 | static struct gpio_desc *acpi_get_gpiod_by_index(struct acpi_device *adev, |
16ba046e DT |
893 | const char *propname, |
894 | int index, | |
895 | struct acpi_gpio_info *info) | |
12028d2d MW |
896 | { |
897 | struct acpi_gpio_lookup lookup; | |
12028d2d MW |
898 | int ret; |
899 | ||
0d9a693c | 900 | if (!adev) |
936e15dd | 901 | return ERR_PTR(-ENODEV); |
12028d2d MW |
902 | |
903 | memset(&lookup, 0, sizeof(lookup)); | |
904 | lookup.index = index; | |
12028d2d | 905 | |
0d9a693c | 906 | if (propname) { |
0d9a693c MW |
907 | dev_dbg(&adev->dev, "GPIO: looking up %s\n", propname); |
908 | ||
504a3374 RW |
909 | ret = acpi_gpio_property_lookup(acpi_fwnode_handle(adev), |
910 | propname, index, &lookup); | |
d079524a RW |
911 | if (ret) |
912 | return ERR_PTR(ret); | |
0d9a693c | 913 | |
74301f27 | 914 | dev_dbg(&adev->dev, "GPIO: _DSD returned %s %d %u %u\n", |
5870cff4 | 915 | dev_name(&lookup.info.adev->dev), lookup.index, |
d079524a | 916 | lookup.pin_index, lookup.active_low); |
0d9a693c MW |
917 | } else { |
918 | dev_dbg(&adev->dev, "GPIO: looking up %d in _CRS\n", index); | |
5870cff4 | 919 | lookup.info.adev = adev; |
0d9a693c MW |
920 | } |
921 | ||
d079524a RW |
922 | ret = acpi_gpio_resource_lookup(&lookup, info); |
923 | return ret ? ERR_PTR(ret) : lookup.desc; | |
12028d2d | 924 | } |
664e3e5a | 925 | |
16ba046e DT |
926 | /** |
927 | * acpi_get_gpiod_from_data() - get a GPIO descriptor from ACPI data node | |
928 | * @fwnode: pointer to an ACPI firmware node to get the GPIO information from | |
929 | * @propname: Property name of the GPIO | |
930 | * @index: index of GpioIo/GpioInt resource (starting from %0) | |
931 | * @info: info pointer to fill in (optional) | |
932 | * | |
933 | * This function uses the property-based GPIO lookup to get to the GPIO | |
934 | * resource with the relevant information from a data-only ACPI firmware node | |
935 | * and uses that to obtain the GPIO descriptor to return. | |
936 | * | |
937 | * If the GPIO cannot be translated or there is an error an ERR_PTR is | |
938 | * returned. | |
939 | */ | |
940 | static struct gpio_desc *acpi_get_gpiod_from_data(struct fwnode_handle *fwnode, | |
941 | const char *propname, | |
942 | int index, | |
943 | struct acpi_gpio_info *info) | |
944 | { | |
945 | struct acpi_gpio_lookup lookup; | |
946 | int ret; | |
947 | ||
948 | if (!is_acpi_data_node(fwnode)) | |
949 | return ERR_PTR(-ENODEV); | |
950 | ||
951 | if (!propname) | |
952 | return ERR_PTR(-EINVAL); | |
953 | ||
954 | lookup.index = index; | |
955 | ||
956 | ret = acpi_gpio_property_lookup(fwnode, propname, index, &lookup); | |
957 | if (ret) | |
958 | return ERR_PTR(ret); | |
959 | ||
960 | ret = acpi_gpio_resource_lookup(&lookup, info); | |
961 | return ret ? ERR_PTR(ret) : lookup.desc; | |
962 | } | |
963 | ||
4f78d91c DT |
964 | static bool acpi_can_fallback_to_crs(struct acpi_device *adev, |
965 | const char *con_id) | |
966 | { | |
967 | /* Never allow fallback if the device has properties */ | |
968 | if (acpi_dev_has_props(adev) || adev->driver_gpios) | |
969 | return false; | |
970 | ||
971 | return con_id == NULL; | |
972 | } | |
973 | ||
2b6bce80 | 974 | struct gpio_desc *acpi_find_gpio(struct fwnode_handle *fwnode, |
031ba28a LW |
975 | const char *con_id, |
976 | unsigned int idx, | |
a31f5c3a | 977 | enum gpiod_flags *dflags, |
fed7026a | 978 | unsigned long *lookupflags) |
031ba28a | 979 | { |
16ba046e | 980 | struct acpi_device *adev = to_acpi_device_node(fwnode); |
031ba28a LW |
981 | struct acpi_gpio_info info; |
982 | struct gpio_desc *desc; | |
983 | char propname[32]; | |
984 | int i; | |
985 | ||
986 | /* Try first from _DSD */ | |
987 | for (i = 0; i < ARRAY_SIZE(gpio_suffixes); i++) { | |
9e66504a | 988 | if (con_id) { |
031ba28a LW |
989 | snprintf(propname, sizeof(propname), "%s-%s", |
990 | con_id, gpio_suffixes[i]); | |
991 | } else { | |
992 | snprintf(propname, sizeof(propname), "%s", | |
993 | gpio_suffixes[i]); | |
994 | } | |
995 | ||
16ba046e DT |
996 | if (adev) |
997 | desc = acpi_get_gpiod_by_index(adev, | |
998 | propname, idx, &info); | |
999 | else | |
1000 | desc = acpi_get_gpiod_from_data(fwnode, | |
1001 | propname, idx, &info); | |
693bdaa1 | 1002 | if (!IS_ERR(desc)) |
031ba28a | 1003 | break; |
693bdaa1 DT |
1004 | if (PTR_ERR(desc) == -EPROBE_DEFER) |
1005 | return ERR_CAST(desc); | |
031ba28a LW |
1006 | } |
1007 | ||
1008 | /* Then from plain _CRS GPIOs */ | |
1009 | if (IS_ERR(desc)) { | |
16ba046e | 1010 | if (!adev || !acpi_can_fallback_to_crs(adev, con_id)) |
031ba28a LW |
1011 | return ERR_PTR(-ENOENT); |
1012 | ||
1013 | desc = acpi_get_gpiod_by_index(adev, NULL, idx, &info); | |
1014 | if (IS_ERR(desc)) | |
1015 | return desc; | |
fe06b56c | 1016 | } |
031ba28a | 1017 | |
fe06b56c | 1018 | if (info.gpioint && |
a31f5c3a | 1019 | (*dflags == GPIOD_OUT_LOW || *dflags == GPIOD_OUT_HIGH)) { |
be3dc15f | 1020 | dev_dbg(&adev->dev, "refusing GpioInt() entry when doing GPIOD_OUT_* lookup\n"); |
fe06b56c | 1021 | return ERR_PTR(-ENOENT); |
031ba28a LW |
1022 | } |
1023 | ||
5c34b6c1 | 1024 | acpi_gpio_update_gpiod_flags(dflags, &info); |
606be344 | 1025 | acpi_gpio_update_gpiod_lookup_flags(lookupflags, &info); |
031ba28a LW |
1026 | return desc; |
1027 | } | |
1028 | ||
c884fbd4 | 1029 | /** |
4c992560 | 1030 | * acpi_dev_gpio_irq_wake_get_by() - Find GpioInt and translate it to Linux IRQ number |
c884fbd4 | 1031 | * @adev: pointer to a ACPI device to get IRQ from |
80939021 | 1032 | * @name: optional name of GpioInt resource |
c884fbd4 | 1033 | * @index: index of GpioInt resource (starting from %0) |
4c992560 | 1034 | * @wake_capable: Set to true if the IRQ is wake capable |
c884fbd4 MW |
1035 | * |
1036 | * If the device has one or more GpioInt resources, this function can be | |
1037 | * used to translate from the GPIO offset in the resource to the Linux IRQ | |
1038 | * number. | |
1039 | * | |
a31f5c3a AS |
1040 | * The function is idempotent, though each time it runs it will configure GPIO |
1041 | * pin direction according to the flags in GpioInt resource. | |
1042 | * | |
80939021 AS |
1043 | * The function takes optional @name parameter. If the resource has a property |
1044 | * name, then only those will be taken into account. | |
1045 | * | |
4c992560 RR |
1046 | * The GPIO is considered wake capable if the GpioInt resource specifies |
1047 | * SharedAndWake or ExclusiveAndWake. | |
1048 | * | |
db05c7ef | 1049 | * Return: Linux IRQ number (> %0) on success, negative errno on failure. |
c884fbd4 | 1050 | */ |
4c992560 RR |
1051 | int acpi_dev_gpio_irq_wake_get_by(struct acpi_device *adev, const char *name, int index, |
1052 | bool *wake_capable) | |
c884fbd4 MW |
1053 | { |
1054 | int idx, i; | |
52044723 | 1055 | unsigned int irq_flags; |
a31f5c3a | 1056 | int ret; |
c884fbd4 MW |
1057 | |
1058 | for (i = 0, idx = 0; idx <= index; i++) { | |
1059 | struct acpi_gpio_info info; | |
1060 | struct gpio_desc *desc; | |
1061 | ||
80939021 | 1062 | desc = acpi_get_gpiod_by_index(adev, name, i, &info); |
6798d727 HG |
1063 | |
1064 | /* Ignore -EPROBE_DEFER, it only matters if idx matches */ | |
1065 | if (IS_ERR(desc) && PTR_ERR(desc) != -EPROBE_DEFER) | |
1066 | return PTR_ERR(desc); | |
1067 | ||
52044723 | 1068 | if (info.gpioint && idx++ == index) { |
2d6c06f5 | 1069 | unsigned long lflags = GPIO_LOOKUP_FLAGS_DEFAULT; |
e7b73132 | 1070 | enum gpiod_flags dflags = GPIOD_ASIS; |
a31f5c3a | 1071 | char label[32]; |
6798d727 | 1072 | int irq; |
52044723 | 1073 | |
6798d727 HG |
1074 | if (IS_ERR(desc)) |
1075 | return PTR_ERR(desc); | |
52044723 | 1076 | |
6798d727 | 1077 | irq = gpiod_to_irq(desc); |
52044723 CR |
1078 | if (irq < 0) |
1079 | return irq; | |
1080 | ||
e7b73132 AS |
1081 | acpi_gpio_update_gpiod_flags(&dflags, &info); |
1082 | acpi_gpio_update_gpiod_lookup_flags(&lflags, &info); | |
1083 | ||
a31f5c3a | 1084 | snprintf(label, sizeof(label), "GpioInt() %d", index); |
e7b73132 | 1085 | ret = gpiod_configure_flags(desc, label, lflags, dflags); |
a31f5c3a AS |
1086 | if (ret < 0) |
1087 | return ret; | |
1088 | ||
660c619b AS |
1089 | /* ACPI uses hundredths of milliseconds units */ |
1090 | ret = gpio_set_debounce_timeout(desc, info.debounce * 10); | |
8dcb7a15 AS |
1091 | if (ret) |
1092 | return ret; | |
1093 | ||
52044723 CR |
1094 | irq_flags = acpi_dev_get_irq_type(info.triggering, |
1095 | info.polarity); | |
1096 | ||
bdfd6ab8 HG |
1097 | /* |
1098 | * If the IRQ is not already in use then set type | |
1099 | * if specified and different than the current one. | |
1100 | */ | |
1101 | if (can_request_irq(irq, irq_flags)) { | |
1102 | if (irq_flags != IRQ_TYPE_NONE && | |
1103 | irq_flags != irq_get_trigger_type(irq)) | |
1104 | irq_set_irq_type(irq, irq_flags); | |
1105 | } else { | |
1106 | dev_dbg(&adev->dev, "IRQ %d already in use\n", irq); | |
1107 | } | |
52044723 | 1108 | |
d63f11c0 ML |
1109 | /* avoid suspend issues with GPIOs when systems are using S3 */ |
1110 | if (wake_capable && acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0) | |
4c992560 RR |
1111 | *wake_capable = info.wake_capable; |
1112 | ||
52044723 CR |
1113 | return irq; |
1114 | } | |
1115 | ||
c884fbd4 | 1116 | } |
6798d727 | 1117 | return -ENOENT; |
c884fbd4 | 1118 | } |
4c992560 | 1119 | EXPORT_SYMBOL_GPL(acpi_dev_gpio_irq_wake_get_by); |
c884fbd4 | 1120 | |
473ed7be MW |
1121 | static acpi_status |
1122 | acpi_gpio_adr_space_handler(u32 function, acpi_physical_address address, | |
1123 | u32 bits, u64 *value, void *handler_context, | |
1124 | void *region_context) | |
1125 | { | |
1126 | struct acpi_gpio_chip *achip = region_context; | |
1127 | struct gpio_chip *chip = achip->chip; | |
1128 | struct acpi_resource_gpio *agpio; | |
1129 | struct acpi_resource *ares; | |
74301f27 | 1130 | u16 pin_index = address; |
473ed7be | 1131 | acpi_status status; |
c15d821d | 1132 | int length; |
473ed7be MW |
1133 | int i; |
1134 | ||
1135 | status = acpi_buffer_to_resource(achip->conn_info.connection, | |
1136 | achip->conn_info.length, &ares); | |
1137 | if (ACPI_FAILURE(status)) | |
1138 | return status; | |
1139 | ||
1140 | if (WARN_ON(ares->type != ACPI_RESOURCE_TYPE_GPIO)) { | |
1141 | ACPI_FREE(ares); | |
1142 | return AE_BAD_PARAMETER; | |
1143 | } | |
1144 | ||
1145 | agpio = &ares->data.gpio; | |
473ed7be MW |
1146 | |
1147 | if (WARN_ON(agpio->io_restriction == ACPI_IO_RESTRICT_INPUT && | |
1148 | function == ACPI_WRITE)) { | |
1149 | ACPI_FREE(ares); | |
1150 | return AE_BAD_PARAMETER; | |
1151 | } | |
1152 | ||
74301f27 | 1153 | length = min_t(u16, agpio->pin_table_length, pin_index + bits); |
c15d821d | 1154 | for (i = pin_index; i < length; ++i) { |
0c2cae09 | 1155 | unsigned int pin = agpio->pin_table[i]; |
473ed7be MW |
1156 | struct acpi_gpio_connection *conn; |
1157 | struct gpio_desc *desc; | |
1158 | bool found; | |
1159 | ||
473ed7be MW |
1160 | mutex_lock(&achip->conn_lock); |
1161 | ||
1162 | found = false; | |
1163 | list_for_each_entry(conn, &achip->conns, node) { | |
e46cf32c | 1164 | if (conn->pin == pin) { |
473ed7be | 1165 | found = true; |
e46cf32c | 1166 | desc = conn->desc; |
473ed7be MW |
1167 | break; |
1168 | } | |
1169 | } | |
c103a10f MW |
1170 | |
1171 | /* | |
1172 | * The same GPIO can be shared between operation region and | |
1173 | * event but only if the access here is ACPI_READ. In that | |
1174 | * case we "borrow" the event GPIO instead. | |
1175 | */ | |
c163f90c | 1176 | if (!found && agpio->shareable == ACPI_SHARED && |
c103a10f MW |
1177 | function == ACPI_READ) { |
1178 | struct acpi_gpio_event *event; | |
1179 | ||
1180 | list_for_each_entry(event, &achip->events, node) { | |
1181 | if (event->pin == pin) { | |
1182 | desc = event->desc; | |
1183 | found = true; | |
1184 | break; | |
1185 | } | |
1186 | } | |
1187 | } | |
1188 | ||
473ed7be | 1189 | if (!found) { |
2e2b496c | 1190 | desc = acpi_request_own_gpiod(chip, agpio, i, "ACPI:OpRegion"); |
e46cf32c | 1191 | if (IS_ERR(desc)) { |
473ed7be | 1192 | mutex_unlock(&achip->conn_lock); |
ce698f4e | 1193 | status = AE_ERROR; |
473ed7be MW |
1194 | goto out; |
1195 | } | |
1196 | ||
473ed7be MW |
1197 | conn = kzalloc(sizeof(*conn), GFP_KERNEL); |
1198 | if (!conn) { | |
473ed7be MW |
1199 | gpiochip_free_own_desc(desc); |
1200 | mutex_unlock(&achip->conn_lock); | |
ce698f4e | 1201 | status = AE_NO_MEMORY; |
473ed7be MW |
1202 | goto out; |
1203 | } | |
1204 | ||
e46cf32c | 1205 | conn->pin = pin; |
473ed7be MW |
1206 | conn->desc = desc; |
1207 | list_add_tail(&conn->node, &achip->conns); | |
1208 | } | |
1209 | ||
1210 | mutex_unlock(&achip->conn_lock); | |
1211 | ||
1212 | if (function == ACPI_WRITE) | |
2c4d00cb | 1213 | gpiod_set_raw_value_cansleep(desc, !!(*value & BIT(i))); |
473ed7be | 1214 | else |
dc62b56a | 1215 | *value |= (u64)gpiod_get_raw_value_cansleep(desc) << i; |
473ed7be MW |
1216 | } |
1217 | ||
1218 | out: | |
1219 | ACPI_FREE(ares); | |
1220 | return status; | |
1221 | } | |
1222 | ||
1223 | static void acpi_gpiochip_request_regions(struct acpi_gpio_chip *achip) | |
1224 | { | |
1225 | struct gpio_chip *chip = achip->chip; | |
58383c78 | 1226 | acpi_handle handle = ACPI_HANDLE(chip->parent); |
473ed7be MW |
1227 | acpi_status status; |
1228 | ||
1229 | INIT_LIST_HEAD(&achip->conns); | |
1230 | mutex_init(&achip->conn_lock); | |
1231 | status = acpi_install_address_space_handler(handle, ACPI_ADR_SPACE_GPIO, | |
1232 | acpi_gpio_adr_space_handler, | |
1233 | NULL, achip); | |
1234 | if (ACPI_FAILURE(status)) | |
58383c78 LW |
1235 | dev_err(chip->parent, |
1236 | "Failed to install GPIO OpRegion handler\n"); | |
473ed7be MW |
1237 | } |
1238 | ||
1239 | static void acpi_gpiochip_free_regions(struct acpi_gpio_chip *achip) | |
1240 | { | |
1241 | struct gpio_chip *chip = achip->chip; | |
58383c78 | 1242 | acpi_handle handle = ACPI_HANDLE(chip->parent); |
473ed7be MW |
1243 | struct acpi_gpio_connection *conn, *tmp; |
1244 | acpi_status status; | |
1245 | ||
1246 | status = acpi_remove_address_space_handler(handle, ACPI_ADR_SPACE_GPIO, | |
1247 | acpi_gpio_adr_space_handler); | |
1248 | if (ACPI_FAILURE(status)) { | |
58383c78 LW |
1249 | dev_err(chip->parent, |
1250 | "Failed to remove GPIO OpRegion handler\n"); | |
473ed7be MW |
1251 | return; |
1252 | } | |
1253 | ||
1254 | list_for_each_entry_safe_reverse(conn, tmp, &achip->conns, node) { | |
1255 | gpiochip_free_own_desc(conn->desc); | |
1256 | list_del(&conn->node); | |
1257 | kfree(conn); | |
1258 | } | |
1259 | } | |
1260 | ||
fed7026a AS |
1261 | static struct gpio_desc * |
1262 | acpi_gpiochip_parse_own_gpio(struct acpi_gpio_chip *achip, | |
1263 | struct fwnode_handle *fwnode, | |
1264 | const char **name, | |
1265 | unsigned long *lflags, | |
80c8d927 | 1266 | enum gpiod_flags *dflags) |
c80f1ba7 MW |
1267 | { |
1268 | struct gpio_chip *chip = achip->chip; | |
1269 | struct gpio_desc *desc; | |
1270 | u32 gpios[2]; | |
1271 | int ret; | |
1272 | ||
2d6c06f5 | 1273 | *lflags = GPIO_LOOKUP_FLAGS_DEFAULT; |
32fa6552 | 1274 | *dflags = GPIOD_ASIS; |
c82064f2 AB |
1275 | *name = NULL; |
1276 | ||
c80f1ba7 MW |
1277 | ret = fwnode_property_read_u32_array(fwnode, "gpios", gpios, |
1278 | ARRAY_SIZE(gpios)); | |
1279 | if (ret < 0) | |
1280 | return ERR_PTR(ret); | |
1281 | ||
03c4749d | 1282 | desc = gpiochip_get_desc(chip, gpios[0]); |
c80f1ba7 MW |
1283 | if (IS_ERR(desc)) |
1284 | return desc; | |
1285 | ||
c80f1ba7 MW |
1286 | if (gpios[1]) |
1287 | *lflags |= GPIO_ACTIVE_LOW; | |
1288 | ||
1289 | if (fwnode_property_present(fwnode, "input")) | |
1290 | *dflags |= GPIOD_IN; | |
1291 | else if (fwnode_property_present(fwnode, "output-low")) | |
1292 | *dflags |= GPIOD_OUT_LOW; | |
1293 | else if (fwnode_property_present(fwnode, "output-high")) | |
1294 | *dflags |= GPIOD_OUT_HIGH; | |
1295 | else | |
1296 | return ERR_PTR(-EINVAL); | |
1297 | ||
1298 | fwnode_property_read_string(fwnode, "line-name", name); | |
1299 | ||
1300 | return desc; | |
1301 | } | |
1302 | ||
1303 | static void acpi_gpiochip_scan_gpios(struct acpi_gpio_chip *achip) | |
1304 | { | |
1305 | struct gpio_chip *chip = achip->chip; | |
1306 | struct fwnode_handle *fwnode; | |
1307 | ||
1308 | device_for_each_child_node(chip->parent, fwnode) { | |
fed7026a | 1309 | unsigned long lflags; |
80c8d927 | 1310 | enum gpiod_flags dflags; |
c80f1ba7 MW |
1311 | struct gpio_desc *desc; |
1312 | const char *name; | |
1313 | int ret; | |
1314 | ||
1315 | if (!fwnode_property_present(fwnode, "gpio-hog")) | |
1316 | continue; | |
1317 | ||
1318 | desc = acpi_gpiochip_parse_own_gpio(achip, fwnode, &name, | |
1319 | &lflags, &dflags); | |
1320 | if (IS_ERR(desc)) | |
1321 | continue; | |
1322 | ||
1323 | ret = gpiod_hog(desc, name, lflags, dflags); | |
1324 | if (ret) { | |
1325 | dev_err(chip->parent, "Failed to hog GPIO\n"); | |
1b6998c9 | 1326 | fwnode_handle_put(fwnode); |
c80f1ba7 MW |
1327 | return; |
1328 | } | |
1329 | } | |
1330 | } | |
1331 | ||
664e3e5a MW |
1332 | void acpi_gpiochip_add(struct gpio_chip *chip) |
1333 | { | |
aa92b6f6 | 1334 | struct acpi_gpio_chip *acpi_gpio; |
a9e10e58 | 1335 | struct acpi_device *adev; |
aa92b6f6 MW |
1336 | acpi_status status; |
1337 | ||
58383c78 | 1338 | if (!chip || !chip->parent) |
e9595f84 MW |
1339 | return; |
1340 | ||
a9e10e58 DS |
1341 | adev = ACPI_COMPANION(chip->parent); |
1342 | if (!adev) | |
aa92b6f6 MW |
1343 | return; |
1344 | ||
1345 | acpi_gpio = kzalloc(sizeof(*acpi_gpio), GFP_KERNEL); | |
1346 | if (!acpi_gpio) { | |
58383c78 | 1347 | dev_err(chip->parent, |
aa92b6f6 MW |
1348 | "Failed to allocate memory for ACPI GPIO chip\n"); |
1349 | return; | |
1350 | } | |
1351 | ||
1352 | acpi_gpio->chip = chip; | |
c103a10f | 1353 | INIT_LIST_HEAD(&acpi_gpio->events); |
78d3a92e | 1354 | INIT_LIST_HEAD(&acpi_gpio->deferred_req_irqs_list_entry); |
aa92b6f6 | 1355 | |
a9e10e58 | 1356 | status = acpi_attach_data(adev->handle, acpi_gpio_chip_dh, acpi_gpio); |
aa92b6f6 | 1357 | if (ACPI_FAILURE(status)) { |
58383c78 | 1358 | dev_err(chip->parent, "Failed to attach ACPI GPIO chip\n"); |
aa92b6f6 MW |
1359 | kfree(acpi_gpio); |
1360 | return; | |
1361 | } | |
1362 | ||
473ed7be | 1363 | acpi_gpiochip_request_regions(acpi_gpio); |
c80f1ba7 | 1364 | acpi_gpiochip_scan_gpios(acpi_gpio); |
a9e10e58 | 1365 | acpi_dev_clear_dependencies(adev); |
664e3e5a MW |
1366 | } |
1367 | ||
1368 | void acpi_gpiochip_remove(struct gpio_chip *chip) | |
1369 | { | |
aa92b6f6 MW |
1370 | struct acpi_gpio_chip *acpi_gpio; |
1371 | acpi_handle handle; | |
1372 | acpi_status status; | |
1373 | ||
58383c78 | 1374 | if (!chip || !chip->parent) |
e9595f84 MW |
1375 | return; |
1376 | ||
58383c78 | 1377 | handle = ACPI_HANDLE(chip->parent); |
aa92b6f6 MW |
1378 | if (!handle) |
1379 | return; | |
1380 | ||
1381 | status = acpi_get_data(handle, acpi_gpio_chip_dh, (void **)&acpi_gpio); | |
1382 | if (ACPI_FAILURE(status)) { | |
58383c78 | 1383 | dev_warn(chip->parent, "Failed to retrieve ACPI GPIO chip\n"); |
aa92b6f6 MW |
1384 | return; |
1385 | } | |
1386 | ||
473ed7be | 1387 | acpi_gpiochip_free_regions(acpi_gpio); |
aa92b6f6 MW |
1388 | |
1389 | acpi_detach_data(handle, acpi_gpio_chip_dh); | |
1390 | kfree(acpi_gpio); | |
664e3e5a | 1391 | } |
66858527 | 1392 | |
6f7194a1 | 1393 | static int acpi_gpio_package_count(const union acpi_object *obj) |
66858527 RI |
1394 | { |
1395 | const union acpi_object *element = obj->package.elements; | |
1396 | const union acpi_object *end = element + obj->package.count; | |
1397 | unsigned int count = 0; | |
1398 | ||
1399 | while (element < end) { | |
6f7194a1 MW |
1400 | switch (element->type) { |
1401 | case ACPI_TYPE_LOCAL_REFERENCE: | |
1402 | element += 3; | |
df561f66 | 1403 | fallthrough; |
6f7194a1 MW |
1404 | case ACPI_TYPE_INTEGER: |
1405 | element++; | |
66858527 | 1406 | count++; |
6f7194a1 | 1407 | break; |
66858527 | 1408 | |
6f7194a1 MW |
1409 | default: |
1410 | return -EPROTO; | |
1411 | } | |
66858527 | 1412 | } |
6f7194a1 | 1413 | |
66858527 RI |
1414 | return count; |
1415 | } | |
1416 | ||
1417 | static int acpi_find_gpio_count(struct acpi_resource *ares, void *data) | |
1418 | { | |
1419 | unsigned int *count = data; | |
1420 | ||
1421 | if (ares->type == ACPI_RESOURCE_TYPE_GPIO) | |
1422 | *count += ares->data.gpio.pin_table_length; | |
1423 | ||
1424 | return 1; | |
1425 | } | |
1426 | ||
1427 | /** | |
85edcd01 AS |
1428 | * acpi_gpio_count - count the GPIOs associated with a device / function |
1429 | * @dev: GPIO consumer, can be %NULL for system-global GPIOs | |
66858527 | 1430 | * @con_id: function within the GPIO consumer |
85edcd01 AS |
1431 | * |
1432 | * Return: | |
1433 | * The number of GPIOs associated with a device / function or %-ENOENT, | |
1434 | * if no GPIO has been assigned to the requested function. | |
66858527 RI |
1435 | */ |
1436 | int acpi_gpio_count(struct device *dev, const char *con_id) | |
1437 | { | |
1438 | struct acpi_device *adev = ACPI_COMPANION(dev); | |
1439 | const union acpi_object *obj; | |
1440 | const struct acpi_gpio_mapping *gm; | |
1441 | int count = -ENOENT; | |
1442 | int ret; | |
1443 | char propname[32]; | |
1444 | unsigned int i; | |
1445 | ||
1446 | /* Try first from _DSD */ | |
1447 | for (i = 0; i < ARRAY_SIZE(gpio_suffixes); i++) { | |
9e66504a | 1448 | if (con_id) |
66858527 RI |
1449 | snprintf(propname, sizeof(propname), "%s-%s", |
1450 | con_id, gpio_suffixes[i]); | |
1451 | else | |
1452 | snprintf(propname, sizeof(propname), "%s", | |
1453 | gpio_suffixes[i]); | |
1454 | ||
1455 | ret = acpi_dev_get_property(adev, propname, ACPI_TYPE_ANY, | |
1456 | &obj); | |
1457 | if (ret == 0) { | |
1458 | if (obj->type == ACPI_TYPE_LOCAL_REFERENCE) | |
1459 | count = 1; | |
1460 | else if (obj->type == ACPI_TYPE_PACKAGE) | |
1461 | count = acpi_gpio_package_count(obj); | |
1462 | } else if (adev->driver_gpios) { | |
1463 | for (gm = adev->driver_gpios; gm->name; gm++) | |
1464 | if (strcmp(propname, gm->name) == 0) { | |
1465 | count = gm->size; | |
1466 | break; | |
1467 | } | |
1468 | } | |
4ed55016 | 1469 | if (count > 0) |
66858527 RI |
1470 | break; |
1471 | } | |
1472 | ||
1473 | /* Then from plain _CRS GPIOs */ | |
1474 | if (count < 0) { | |
1475 | struct list_head resource_list; | |
1476 | unsigned int crs_count = 0; | |
1477 | ||
6fe9da42 AS |
1478 | if (!acpi_can_fallback_to_crs(adev, con_id)) |
1479 | return count; | |
1480 | ||
66858527 RI |
1481 | INIT_LIST_HEAD(&resource_list); |
1482 | acpi_dev_get_resources(adev, &resource_list, | |
1483 | acpi_find_gpio_count, &crs_count); | |
1484 | acpi_dev_free_resource_list(&resource_list); | |
1485 | if (crs_count > 0) | |
1486 | count = crs_count; | |
1487 | } | |
4ed55016 | 1488 | return count ? count : -ENOENT; |
66858527 | 1489 | } |
10cf4899 | 1490 | |
e59f5e08 | 1491 | /* Run deferred acpi_gpiochip_request_irqs() */ |
04fd1ca7 | 1492 | static int __init acpi_gpio_handle_deferred_request_irqs(void) |
ca876c74 | 1493 | { |
78d3a92e HG |
1494 | struct acpi_gpio_chip *acpi_gpio, *tmp; |
1495 | ||
1496 | mutex_lock(&acpi_gpio_deferred_req_irqs_lock); | |
1497 | list_for_each_entry_safe(acpi_gpio, tmp, | |
1498 | &acpi_gpio_deferred_req_irqs_list, | |
e59f5e08 HG |
1499 | deferred_req_irqs_list_entry) |
1500 | acpi_gpiochip_request_irqs(acpi_gpio); | |
78d3a92e HG |
1501 | |
1502 | acpi_gpio_deferred_req_irqs_done = true; | |
1503 | mutex_unlock(&acpi_gpio_deferred_req_irqs_lock); | |
ca876c74 BT |
1504 | |
1505 | return 0; | |
1506 | } | |
1507 | /* We must use _sync so that this runs after the first deferred_probe run */ | |
e59f5e08 | 1508 | late_initcall_sync(acpi_gpio_handle_deferred_request_irqs); |
61f7f7c8 | 1509 | |
04fd1ca7 | 1510 | static const struct dmi_system_id gpiolib_acpi_quirks[] __initconst = { |
61f7f7c8 | 1511 | { |
2727315d HG |
1512 | /* |
1513 | * The Minix Neo Z83-4 has a micro-USB-B id-pin handler for | |
1514 | * a non existing micro-USB-B connector which puts the HDMI | |
1515 | * DDC pins in GPIO mode, breaking HDMI support. | |
1516 | */ | |
61f7f7c8 HG |
1517 | .matches = { |
1518 | DMI_MATCH(DMI_SYS_VENDOR, "MINIX"), | |
1519 | DMI_MATCH(DMI_PRODUCT_NAME, "Z83-4"), | |
1ad1b540 | 1520 | }, |
2ccb21f5 HG |
1521 | .driver_data = &(struct acpi_gpiolib_dmi_quirk) { |
1522 | .no_edge_events_on_boot = true, | |
1523 | }, | |
61f7f7c8 | 1524 | }, |
2727315d HG |
1525 | { |
1526 | /* | |
1527 | * The Terra Pad 1061 has a micro-USB-B id-pin handler, which | |
1528 | * instead of controlling the actual micro-USB-B turns the 5V | |
1529 | * boost for its USB-A connector off. The actual micro-USB-B | |
1530 | * connector is wired for charging only. | |
1531 | */ | |
1532 | .matches = { | |
1533 | DMI_MATCH(DMI_SYS_VENDOR, "Wortmann_AG"), | |
1534 | DMI_MATCH(DMI_PRODUCT_NAME, "TERRA_PAD_1061"), | |
1ad1b540 | 1535 | }, |
2ccb21f5 HG |
1536 | .driver_data = &(struct acpi_gpiolib_dmi_quirk) { |
1537 | .no_edge_events_on_boot = true, | |
1538 | }, | |
2727315d | 1539 | }, |
da91ece2 HG |
1540 | { |
1541 | /* | |
1542 | * The Dell Venue 10 Pro 5055, with Bay Trail SoC + TI PMIC uses an | |
1543 | * external embedded-controller connected via I2C + an ACPI GPIO | |
1544 | * event handler on INT33FFC:02 pin 12, causing spurious wakeups. | |
1545 | */ | |
1546 | .matches = { | |
1547 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
1548 | DMI_MATCH(DMI_PRODUCT_NAME, "Venue 10 Pro 5055"), | |
1549 | }, | |
1550 | .driver_data = &(struct acpi_gpiolib_dmi_quirk) { | |
1551 | .ignore_wake = "INT33FC:02@12", | |
1552 | }, | |
1553 | }, | |
aa23ca3d HG |
1554 | { |
1555 | /* | |
efaa87fa HG |
1556 | * HP X2 10 models with Cherry Trail SoC + TI PMIC use an |
1557 | * external embedded-controller connected via I2C + an ACPI GPIO | |
1558 | * event handler on INT33FF:01 pin 0, causing spurious wakeups. | |
1559 | * When suspending by closing the LID, the power to the USB | |
1560 | * keyboard is turned off, causing INT0002 ACPI events to | |
1561 | * trigger once the XHCI controller notices the keyboard is | |
1562 | * gone. So INT0002 events cause spurious wakeups too. Ignoring | |
1563 | * EC wakes breaks wakeup when opening the lid, the user needs | |
aa23ca3d HG |
1564 | * to press the power-button to wakeup the system. The |
1565 | * alternative is suspend simply not working, which is worse. | |
1566 | */ | |
1567 | .matches = { | |
1568 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
1569 | DMI_MATCH(DMI_PRODUCT_NAME, "HP x2 Detachable 10-p0XX"), | |
1570 | }, | |
2ccb21f5 HG |
1571 | .driver_data = &(struct acpi_gpiolib_dmi_quirk) { |
1572 | .ignore_wake = "INT33FF:01@0,INT0002:00@2", | |
1573 | }, | |
aa23ca3d | 1574 | }, |
0e91506b HG |
1575 | { |
1576 | /* | |
1577 | * HP X2 10 models with Bay Trail SoC + AXP288 PMIC use an | |
1578 | * external embedded-controller connected via I2C + an ACPI GPIO | |
1579 | * event handler on INT33FC:02 pin 28, causing spurious wakeups. | |
1580 | */ | |
1581 | .matches = { | |
1582 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
1583 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion x2 Detachable"), | |
1584 | DMI_MATCH(DMI_BOARD_NAME, "815D"), | |
1585 | }, | |
1586 | .driver_data = &(struct acpi_gpiolib_dmi_quirk) { | |
1587 | .ignore_wake = "INT33FC:02@28", | |
1588 | }, | |
1589 | }, | |
0c625ccf HG |
1590 | { |
1591 | /* | |
1592 | * HP X2 10 models with Cherry Trail SoC + AXP288 PMIC use an | |
1593 | * external embedded-controller connected via I2C + an ACPI GPIO | |
1594 | * event handler on INT33FF:01 pin 0, causing spurious wakeups. | |
1595 | */ | |
1596 | .matches = { | |
1597 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
1598 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion x2 Detachable"), | |
1599 | DMI_MATCH(DMI_BOARD_NAME, "813E"), | |
1600 | }, | |
1601 | .driver_data = &(struct acpi_gpiolib_dmi_quirk) { | |
1602 | .ignore_wake = "INT33FF:01@0", | |
1603 | }, | |
1604 | }, | |
0ea76c40 ML |
1605 | { |
1606 | /* | |
1607 | * Interrupt storm caused from edge triggered floating pin | |
1608 | * Found in BIOS UX325UAZ.300 | |
1609 | * https://bugzilla.kernel.org/show_bug.cgi?id=216208 | |
1610 | */ | |
1611 | .matches = { | |
1612 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), | |
1613 | DMI_MATCH(DMI_PRODUCT_NAME, "ZenBook UX325UAZ_UM325UAZ"), | |
1614 | }, | |
1615 | .driver_data = &(struct acpi_gpiolib_dmi_quirk) { | |
1616 | .ignore_interrupt = "AMDI0030:00@18", | |
1617 | }, | |
1618 | }, | |
782eea0c WS |
1619 | { |
1620 | /* | |
1621 | * Spurious wakeups from TP_ATTN# pin | |
1622 | * Found in BIOS 1.7.8 | |
1623 | * https://gitlab.freedesktop.org/drm/amd/-/issues/1722#note_1720627 | |
1624 | */ | |
1625 | .matches = { | |
1626 | DMI_MATCH(DMI_BOARD_NAME, "NL5xNU"), | |
1627 | }, | |
1628 | .driver_data = &(struct acpi_gpiolib_dmi_quirk) { | |
1629 | .ignore_wake = "ELAN0415:00@9", | |
1630 | }, | |
1631 | }, | |
4cb78618 ML |
1632 | { |
1633 | /* | |
1634 | * Spurious wakeups from TP_ATTN# pin | |
1635 | * Found in BIOS 1.7.8 | |
1636 | * https://gitlab.freedesktop.org/drm/amd/-/issues/1722#note_1720627 | |
1637 | */ | |
1638 | .matches = { | |
1639 | DMI_MATCH(DMI_BOARD_NAME, "NL5xRU"), | |
1640 | }, | |
1641 | .driver_data = &(struct acpi_gpiolib_dmi_quirk) { | |
1642 | .ignore_wake = "ELAN0415:00@9", | |
1643 | }, | |
1644 | }, | |
a69982c3 WS |
1645 | { |
1646 | /* | |
1647 | * Spurious wakeups from TP_ATTN# pin | |
1648 | * Found in BIOS 1.7.7 | |
1649 | */ | |
1650 | .matches = { | |
1651 | DMI_MATCH(DMI_BOARD_NAME, "NH5xAx"), | |
1652 | }, | |
1653 | .driver_data = &(struct acpi_gpiolib_dmi_quirk) { | |
1654 | .ignore_wake = "SYNA1202:00@16", | |
1655 | }, | |
1656 | }, | |
61f7f7c8 HG |
1657 | {} /* Terminating entry */ |
1658 | }; | |
1659 | ||
04fd1ca7 | 1660 | static int __init acpi_gpio_setup_params(void) |
61f7f7c8 | 1661 | { |
2ccb21f5 | 1662 | const struct acpi_gpiolib_dmi_quirk *quirk = NULL; |
1ad1b540 | 1663 | const struct dmi_system_id *id; |
1ad1b540 HG |
1664 | |
1665 | id = dmi_first_match(gpiolib_acpi_quirks); | |
1666 | if (id) | |
2ccb21f5 | 1667 | quirk = id->driver_data; |
1ad1b540 | 1668 | |
61f7f7c8 | 1669 | if (run_edge_events_on_boot < 0) { |
2ccb21f5 | 1670 | if (quirk && quirk->no_edge_events_on_boot) |
61f7f7c8 HG |
1671 | run_edge_events_on_boot = 0; |
1672 | else | |
1673 | run_edge_events_on_boot = 1; | |
1674 | } | |
1675 | ||
2ccb21f5 HG |
1676 | if (ignore_wake == NULL && quirk && quirk->ignore_wake) |
1677 | ignore_wake = quirk->ignore_wake; | |
aa23ca3d | 1678 | |
6b6af7bd ML |
1679 | if (ignore_interrupt == NULL && quirk && quirk->ignore_interrupt) |
1680 | ignore_interrupt = quirk->ignore_interrupt; | |
1681 | ||
61f7f7c8 HG |
1682 | return 0; |
1683 | } | |
1684 | ||
1685 | /* Directly after dmi_setup() which runs as core_initcall() */ | |
1686 | postcore_initcall(acpi_gpio_setup_params); |