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10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/slab.h>
13#include <linux/gpio.h>
14#include <linux/irq.h>
15#include <linux/irqdomain.h>
16#include <linux/mutex.h>
17
18#include "greybus.h"
19#include "gbphy.h"
20
21struct gb_gpio_line {
22
23
24 u8 active: 1,
25 direction: 1,
26 value: 1;
27 u16 debounce_usec;
28
29 u8 irq_type;
30 bool irq_type_pending;
31 bool masked;
32 bool masked_pending;
33};
34
35struct gb_gpio_controller {
36 struct gbphy_device *gbphy_dev;
37 struct gb_connection *connection;
38 u8 line_max;
39 struct gb_gpio_line *lines;
40
41 struct gpio_chip chip;
42 struct irq_chip irqc;
43 struct irq_chip *irqchip;
44 struct irq_domain *irqdomain;
45 unsigned int irq_base;
46 irq_flow_handler_t irq_handler;
47 unsigned int irq_default_type;
48 struct mutex irq_lock;
49};
50#define gpio_chip_to_gb_gpio_controller(chip) \
51 container_of(chip, struct gb_gpio_controller, chip)
52#define irq_data_to_gpio_chip(d) (d->domain->host_data)
53
54static int gb_gpio_line_count_operation(struct gb_gpio_controller *ggc)
55{
56 struct gb_gpio_line_count_response response;
57 int ret;
58
59 ret = gb_operation_sync(ggc->connection, GB_GPIO_TYPE_LINE_COUNT,
60 NULL, 0, &response, sizeof(response));
61 if (!ret)
62 ggc->line_max = response.count;
63 return ret;
64}
65
66static int gb_gpio_activate_operation(struct gb_gpio_controller *ggc, u8 which)
67{
68 struct gb_gpio_activate_request request;
69 struct gbphy_device *gbphy_dev = ggc->gbphy_dev;
70 int ret;
71
72 ret = gbphy_runtime_get_sync(gbphy_dev);
73 if (ret)
74 return ret;
75
76 request.which = which;
77 ret = gb_operation_sync(ggc->connection, GB_GPIO_TYPE_ACTIVATE,
78 &request, sizeof(request), NULL, 0);
79 if (ret) {
80 gbphy_runtime_put_autosuspend(gbphy_dev);
81 return ret;
82 }
83
84 ggc->lines[which].active = true;
85
86 return 0;
87}
88
89static void gb_gpio_deactivate_operation(struct gb_gpio_controller *ggc,
90 u8 which)
91{
92 struct gbphy_device *gbphy_dev = ggc->gbphy_dev;
93 struct device *dev = &gbphy_dev->dev;
94 struct gb_gpio_deactivate_request request;
95 int ret;
96
97 request.which = which;
98 ret = gb_operation_sync(ggc->connection, GB_GPIO_TYPE_DEACTIVATE,
99 &request, sizeof(request), NULL, 0);
100 if (ret) {
101 dev_err(dev, "failed to deactivate gpio %u\n", which);
102 goto out_pm_put;
103 }
104
105 ggc->lines[which].active = false;
106
107out_pm_put:
108 gbphy_runtime_put_autosuspend(gbphy_dev);
109}
110
111static int gb_gpio_get_direction_operation(struct gb_gpio_controller *ggc,
112 u8 which)
113{
114 struct device *dev = &ggc->gbphy_dev->dev;
115 struct gb_gpio_get_direction_request request;
116 struct gb_gpio_get_direction_response response;
117 int ret;
118 u8 direction;
119
120 request.which = which;
121 ret = gb_operation_sync(ggc->connection, GB_GPIO_TYPE_GET_DIRECTION,
122 &request, sizeof(request),
123 &response, sizeof(response));
124 if (ret)
125 return ret;
126
127 direction = response.direction;
128 if (direction && direction != 1) {
129 dev_warn(dev, "gpio %u direction was %u (should be 0 or 1)\n",
130 which, direction);
131 }
132 ggc->lines[which].direction = direction ? 1 : 0;
133 return 0;
134}
135
136static int gb_gpio_direction_in_operation(struct gb_gpio_controller *ggc,
137 u8 which)
138{
139 struct gb_gpio_direction_in_request request;
140 int ret;
141
142 request.which = which;
143 ret = gb_operation_sync(ggc->connection, GB_GPIO_TYPE_DIRECTION_IN,
144 &request, sizeof(request), NULL, 0);
145 if (!ret)
146 ggc->lines[which].direction = 1;
147 return ret;
148}
149
150static int gb_gpio_direction_out_operation(struct gb_gpio_controller *ggc,
151 u8 which, bool value_high)
152{
153 struct gb_gpio_direction_out_request request;
154 int ret;
155
156 request.which = which;
157 request.value = value_high ? 1 : 0;
158 ret = gb_operation_sync(ggc->connection, GB_GPIO_TYPE_DIRECTION_OUT,
159 &request, sizeof(request), NULL, 0);
160 if (!ret)
161 ggc->lines[which].direction = 0;
162 return ret;
163}
164
165static int gb_gpio_get_value_operation(struct gb_gpio_controller *ggc,
166 u8 which)
167{
168 struct device *dev = &ggc->gbphy_dev->dev;
169 struct gb_gpio_get_value_request request;
170 struct gb_gpio_get_value_response response;
171 int ret;
172 u8 value;
173
174 request.which = which;
175 ret = gb_operation_sync(ggc->connection, GB_GPIO_TYPE_GET_VALUE,
176 &request, sizeof(request),
177 &response, sizeof(response));
178 if (ret) {
179 dev_err(dev, "failed to get value of gpio %u\n", which);
180 return ret;
181 }
182
183 value = response.value;
184 if (value && value != 1) {
185 dev_warn(dev, "gpio %u value was %u (should be 0 or 1)\n",
186 which, value);
187 }
188 ggc->lines[which].value = value ? 1 : 0;
189 return 0;
190}
191
192static void gb_gpio_set_value_operation(struct gb_gpio_controller *ggc,
193 u8 which, bool value_high)
194{
195 struct device *dev = &ggc->gbphy_dev->dev;
196 struct gb_gpio_set_value_request request;
197 int ret;
198
199 if (ggc->lines[which].direction == 1) {
200 dev_warn(dev, "refusing to set value of input gpio %u\n",
201 which);
202 return;
203 }
204
205 request.which = which;
206 request.value = value_high ? 1 : 0;
207 ret = gb_operation_sync(ggc->connection, GB_GPIO_TYPE_SET_VALUE,
208 &request, sizeof(request), NULL, 0);
209 if (ret) {
210 dev_err(dev, "failed to set value of gpio %u\n", which);
211 return;
212 }
213
214 ggc->lines[which].value = request.value;
215}
216
217static int gb_gpio_set_debounce_operation(struct gb_gpio_controller *ggc,
218 u8 which, u16 debounce_usec)
219{
220 struct gb_gpio_set_debounce_request request;
221 int ret;
222
223 request.which = which;
224 request.usec = cpu_to_le16(debounce_usec);
225 ret = gb_operation_sync(ggc->connection, GB_GPIO_TYPE_SET_DEBOUNCE,
226 &request, sizeof(request), NULL, 0);
227 if (!ret)
228 ggc->lines[which].debounce_usec = debounce_usec;
229 return ret;
230}
231
232static void _gb_gpio_irq_mask(struct gb_gpio_controller *ggc, u8 hwirq)
233{
234 struct device *dev = &ggc->gbphy_dev->dev;
235 struct gb_gpio_irq_mask_request request;
236 int ret;
237
238 request.which = hwirq;
239 ret = gb_operation_sync(ggc->connection,
240 GB_GPIO_TYPE_IRQ_MASK,
241 &request, sizeof(request), NULL, 0);
242 if (ret)
243 dev_err(dev, "failed to mask irq: %d\n", ret);
244}
245
246static void _gb_gpio_irq_unmask(struct gb_gpio_controller *ggc, u8 hwirq)
247{
248 struct device *dev = &ggc->gbphy_dev->dev;
249 struct gb_gpio_irq_unmask_request request;
250 int ret;
251
252 request.which = hwirq;
253 ret = gb_operation_sync(ggc->connection,
254 GB_GPIO_TYPE_IRQ_UNMASK,
255 &request, sizeof(request), NULL, 0);
256 if (ret)
257 dev_err(dev, "failed to unmask irq: %d\n", ret);
258}
259
260static void _gb_gpio_irq_set_type(struct gb_gpio_controller *ggc,
261 u8 hwirq, u8 type)
262{
263 struct device *dev = &ggc->gbphy_dev->dev;
264 struct gb_gpio_irq_type_request request;
265 int ret;
266
267 request.which = hwirq;
268 request.type = type;
269
270 ret = gb_operation_sync(ggc->connection,
271 GB_GPIO_TYPE_IRQ_TYPE,
272 &request, sizeof(request), NULL, 0);
273 if (ret)
274 dev_err(dev, "failed to set irq type: %d\n", ret);
275}
276
277static void gb_gpio_irq_mask(struct irq_data *d)
278{
279 struct gpio_chip *chip = irq_data_to_gpio_chip(d);
280 struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip);
281 struct gb_gpio_line *line = &ggc->lines[d->hwirq];
282
283 line->masked = true;
284 line->masked_pending = true;
285}
286
287static void gb_gpio_irq_unmask(struct irq_data *d)
288{
289 struct gpio_chip *chip = irq_data_to_gpio_chip(d);
290 struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip);
291 struct gb_gpio_line *line = &ggc->lines[d->hwirq];
292
293 line->masked = false;
294 line->masked_pending = true;
295}
296
297static int gb_gpio_irq_set_type(struct irq_data *d, unsigned int type)
298{
299 struct gpio_chip *chip = irq_data_to_gpio_chip(d);
300 struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip);
301 struct gb_gpio_line *line = &ggc->lines[d->hwirq];
302 struct device *dev = &ggc->gbphy_dev->dev;
303 u8 irq_type;
304
305 switch (type) {
306 case IRQ_TYPE_NONE:
307 irq_type = GB_GPIO_IRQ_TYPE_NONE;
308 break;
309 case IRQ_TYPE_EDGE_RISING:
310 irq_type = GB_GPIO_IRQ_TYPE_EDGE_RISING;
311 break;
312 case IRQ_TYPE_EDGE_FALLING:
313 irq_type = GB_GPIO_IRQ_TYPE_EDGE_FALLING;
314 break;
315 case IRQ_TYPE_EDGE_BOTH:
316 irq_type = GB_GPIO_IRQ_TYPE_EDGE_BOTH;
317 break;
318 case IRQ_TYPE_LEVEL_LOW:
319 irq_type = GB_GPIO_IRQ_TYPE_LEVEL_LOW;
320 break;
321 case IRQ_TYPE_LEVEL_HIGH:
322 irq_type = GB_GPIO_IRQ_TYPE_LEVEL_HIGH;
323 break;
324 default:
325 dev_err(dev, "unsupported irq type: %u\n", type);
326 return -EINVAL;
327 }
328
329 line->irq_type = irq_type;
330 line->irq_type_pending = true;
331
332 return 0;
333}
334
335static void gb_gpio_irq_bus_lock(struct irq_data *d)
336{
337 struct gpio_chip *chip = irq_data_to_gpio_chip(d);
338 struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip);
339
340 mutex_lock(&ggc->irq_lock);
341}
342
343static void gb_gpio_irq_bus_sync_unlock(struct irq_data *d)
344{
345 struct gpio_chip *chip = irq_data_to_gpio_chip(d);
346 struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip);
347 struct gb_gpio_line *line = &ggc->lines[d->hwirq];
348
349 if (line->irq_type_pending) {
350 _gb_gpio_irq_set_type(ggc, d->hwirq, line->irq_type);
351 line->irq_type_pending = false;
352 }
353
354 if (line->masked_pending) {
355 if (line->masked)
356 _gb_gpio_irq_mask(ggc, d->hwirq);
357 else
358 _gb_gpio_irq_unmask(ggc, d->hwirq);
359 line->masked_pending = false;
360 }
361
362 mutex_unlock(&ggc->irq_lock);
363}
364
365static int gb_gpio_request_handler(struct gb_operation *op)
366{
367 struct gb_connection *connection = op->connection;
368 struct gb_gpio_controller *ggc = gb_connection_get_data(connection);
369 struct device *dev = &ggc->gbphy_dev->dev;
370 struct gb_message *request;
371 struct gb_gpio_irq_event_request *event;
372 u8 type = op->type;
373 int irq;
374 struct irq_desc *desc;
375
376 if (type != GB_GPIO_TYPE_IRQ_EVENT) {
377 dev_err(dev, "unsupported unsolicited request: %u\n", type);
378 return -EINVAL;
379 }
380
381 request = op->request;
382
383 if (request->payload_size < sizeof(*event)) {
384 dev_err(dev, "short event received (%zu < %zu)\n",
385 request->payload_size, sizeof(*event));
386 return -EINVAL;
387 }
388
389 event = request->payload;
390 if (event->which > ggc->line_max) {
391 dev_err(dev, "invalid hw irq: %d\n", event->which);
392 return -EINVAL;
393 }
394
395 irq = irq_find_mapping(ggc->irqdomain, event->which);
396 if (!irq) {
397 dev_err(dev, "failed to find IRQ\n");
398 return -EINVAL;
399 }
400 desc = irq_to_desc(irq);
401 if (!desc) {
402 dev_err(dev, "failed to look up irq\n");
403 return -EINVAL;
404 }
405
406 local_irq_disable();
407 generic_handle_irq_desc(desc);
408 local_irq_enable();
409
410 return 0;
411}
412
413static int gb_gpio_request(struct gpio_chip *chip, unsigned int offset)
414{
415 struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip);
416
417 return gb_gpio_activate_operation(ggc, (u8)offset);
418}
419
420static void gb_gpio_free(struct gpio_chip *chip, unsigned int offset)
421{
422 struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip);
423
424 gb_gpio_deactivate_operation(ggc, (u8)offset);
425}
426
427static int gb_gpio_get_direction(struct gpio_chip *chip, unsigned int offset)
428{
429 struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip);
430 u8 which;
431 int ret;
432
433 which = (u8)offset;
434 ret = gb_gpio_get_direction_operation(ggc, which);
435 if (ret)
436 return ret;
437
438 return ggc->lines[which].direction ? 1 : 0;
439}
440
441static int gb_gpio_direction_input(struct gpio_chip *chip, unsigned int offset)
442{
443 struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip);
444
445 return gb_gpio_direction_in_operation(ggc, (u8)offset);
446}
447
448static int gb_gpio_direction_output(struct gpio_chip *chip, unsigned int offset,
449 int value)
450{
451 struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip);
452
453 return gb_gpio_direction_out_operation(ggc, (u8)offset, !!value);
454}
455
456static int gb_gpio_get(struct gpio_chip *chip, unsigned int offset)
457{
458 struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip);
459 u8 which;
460 int ret;
461
462 which = (u8)offset;
463 ret = gb_gpio_get_value_operation(ggc, which);
464 if (ret)
465 return ret;
466
467 return ggc->lines[which].value;
468}
469
470static void gb_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
471{
472 struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip);
473
474 gb_gpio_set_value_operation(ggc, (u8)offset, !!value);
475}
476
477static int gb_gpio_set_config(struct gpio_chip *chip, unsigned int offset,
478 unsigned long config)
479{
480 struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip);
481 u32 debounce;
482
483 if (pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE)
484 return -ENOTSUPP;
485
486 debounce = pinconf_to_config_argument(config);
487 if (debounce > U16_MAX)
488 return -EINVAL;
489
490 return gb_gpio_set_debounce_operation(ggc, (u8)offset, (u16)debounce);
491}
492
493static int gb_gpio_controller_setup(struct gb_gpio_controller *ggc)
494{
495 int ret;
496
497
498 ret = gb_gpio_line_count_operation(ggc);
499 if (ret)
500 return ret;
501
502 ggc->lines = kcalloc(ggc->line_max + 1, sizeof(*ggc->lines),
503 GFP_KERNEL);
504 if (!ggc->lines)
505 return -ENOMEM;
506
507 return ret;
508}
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520static int gb_gpio_irq_map(struct irq_domain *domain, unsigned int irq,
521 irq_hw_number_t hwirq)
522{
523 struct gpio_chip *chip = domain->host_data;
524 struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip);
525
526 irq_set_chip_data(irq, ggc);
527 irq_set_chip_and_handler(irq, ggc->irqchip, ggc->irq_handler);
528 irq_set_noprobe(irq);
529
530
531
532
533 if (ggc->irq_default_type != IRQ_TYPE_NONE)
534 irq_set_irq_type(irq, ggc->irq_default_type);
535
536 return 0;
537}
538
539static void gb_gpio_irq_unmap(struct irq_domain *d, unsigned int irq)
540{
541 irq_set_chip_and_handler(irq, NULL, NULL);
542 irq_set_chip_data(irq, NULL);
543}
544
545static const struct irq_domain_ops gb_gpio_domain_ops = {
546 .map = gb_gpio_irq_map,
547 .unmap = gb_gpio_irq_unmap,
548};
549
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555
556static void gb_gpio_irqchip_remove(struct gb_gpio_controller *ggc)
557{
558 unsigned int offset;
559
560
561 if (ggc->irqdomain) {
562 for (offset = 0; offset < (ggc->line_max + 1); offset++)
563 irq_dispose_mapping(irq_find_mapping(ggc->irqdomain,
564 offset));
565 irq_domain_remove(ggc->irqdomain);
566 }
567
568 if (ggc->irqchip)
569 ggc->irqchip = NULL;
570}
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592static int gb_gpio_irqchip_add(struct gpio_chip *chip,
593 struct irq_chip *irqchip,
594 unsigned int first_irq,
595 irq_flow_handler_t handler,
596 unsigned int type)
597{
598 struct gb_gpio_controller *ggc;
599 unsigned int offset;
600 unsigned int irq_base;
601
602 if (!chip || !irqchip)
603 return -EINVAL;
604
605 ggc = gpio_chip_to_gb_gpio_controller(chip);
606
607 ggc->irqchip = irqchip;
608 ggc->irq_handler = handler;
609 ggc->irq_default_type = type;
610 ggc->irqdomain = irq_domain_add_simple(NULL,
611 ggc->line_max + 1, first_irq,
612 &gb_gpio_domain_ops, chip);
613 if (!ggc->irqdomain) {
614 ggc->irqchip = NULL;
615 return -EINVAL;
616 }
617
618
619
620
621
622
623 for (offset = 0; offset < (ggc->line_max + 1); offset++) {
624 irq_base = irq_create_mapping(ggc->irqdomain, offset);
625 if (offset == 0)
626 ggc->irq_base = irq_base;
627 }
628
629 return 0;
630}
631
632static int gb_gpio_to_irq(struct gpio_chip *chip, unsigned int offset)
633{
634 struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip);
635
636 return irq_find_mapping(ggc->irqdomain, offset);
637}
638
639static int gb_gpio_probe(struct gbphy_device *gbphy_dev,
640 const struct gbphy_device_id *id)
641{
642 struct gb_connection *connection;
643 struct gb_gpio_controller *ggc;
644 struct gpio_chip *gpio;
645 struct irq_chip *irqc;
646 int ret;
647
648 ggc = kzalloc(sizeof(*ggc), GFP_KERNEL);
649 if (!ggc)
650 return -ENOMEM;
651
652 connection = gb_connection_create(gbphy_dev->bundle,
653 le16_to_cpu(gbphy_dev->cport_desc->id),
654 gb_gpio_request_handler);
655 if (IS_ERR(connection)) {
656 ret = PTR_ERR(connection);
657 goto exit_ggc_free;
658 }
659
660 ggc->connection = connection;
661 gb_connection_set_data(connection, ggc);
662 ggc->gbphy_dev = gbphy_dev;
663 gb_gbphy_set_data(gbphy_dev, ggc);
664
665 ret = gb_connection_enable_tx(connection);
666 if (ret)
667 goto exit_connection_destroy;
668
669 ret = gb_gpio_controller_setup(ggc);
670 if (ret)
671 goto exit_connection_disable;
672
673 irqc = &ggc->irqc;
674 irqc->irq_mask = gb_gpio_irq_mask;
675 irqc->irq_unmask = gb_gpio_irq_unmask;
676 irqc->irq_set_type = gb_gpio_irq_set_type;
677 irqc->irq_bus_lock = gb_gpio_irq_bus_lock;
678 irqc->irq_bus_sync_unlock = gb_gpio_irq_bus_sync_unlock;
679 irqc->name = "greybus_gpio";
680
681 mutex_init(&ggc->irq_lock);
682
683 gpio = &ggc->chip;
684
685 gpio->label = "greybus_gpio";
686 gpio->parent = &gbphy_dev->dev;
687 gpio->owner = THIS_MODULE;
688
689 gpio->request = gb_gpio_request;
690 gpio->free = gb_gpio_free;
691 gpio->get_direction = gb_gpio_get_direction;
692 gpio->direction_input = gb_gpio_direction_input;
693 gpio->direction_output = gb_gpio_direction_output;
694 gpio->get = gb_gpio_get;
695 gpio->set = gb_gpio_set;
696 gpio->set_config = gb_gpio_set_config;
697 gpio->to_irq = gb_gpio_to_irq;
698 gpio->base = -1;
699 gpio->ngpio = ggc->line_max + 1;
700 gpio->can_sleep = true;
701
702 ret = gb_connection_enable(connection);
703 if (ret)
704 goto exit_line_free;
705
706 ret = gb_gpio_irqchip_add(gpio, irqc, 0,
707 handle_level_irq, IRQ_TYPE_NONE);
708 if (ret) {
709 dev_err(&gbphy_dev->dev, "failed to add irq chip: %d\n", ret);
710 goto exit_line_free;
711 }
712
713 ret = gpiochip_add(gpio);
714 if (ret) {
715 dev_err(&gbphy_dev->dev, "failed to add gpio chip: %d\n", ret);
716 goto exit_gpio_irqchip_remove;
717 }
718
719 gbphy_runtime_put_autosuspend(gbphy_dev);
720 return 0;
721
722exit_gpio_irqchip_remove:
723 gb_gpio_irqchip_remove(ggc);
724exit_line_free:
725 kfree(ggc->lines);
726exit_connection_disable:
727 gb_connection_disable(connection);
728exit_connection_destroy:
729 gb_connection_destroy(connection);
730exit_ggc_free:
731 kfree(ggc);
732 return ret;
733}
734
735static void gb_gpio_remove(struct gbphy_device *gbphy_dev)
736{
737 struct gb_gpio_controller *ggc = gb_gbphy_get_data(gbphy_dev);
738 struct gb_connection *connection = ggc->connection;
739 int ret;
740
741 ret = gbphy_runtime_get_sync(gbphy_dev);
742 if (ret)
743 gbphy_runtime_get_noresume(gbphy_dev);
744
745 gb_connection_disable_rx(connection);
746 gpiochip_remove(&ggc->chip);
747 gb_gpio_irqchip_remove(ggc);
748 gb_connection_disable(connection);
749 gb_connection_destroy(connection);
750 kfree(ggc->lines);
751 kfree(ggc);
752}
753
754static const struct gbphy_device_id gb_gpio_id_table[] = {
755 { GBPHY_PROTOCOL(GREYBUS_PROTOCOL_GPIO) },
756 { },
757};
758MODULE_DEVICE_TABLE(gbphy, gb_gpio_id_table);
759
760static struct gbphy_driver gpio_driver = {
761 .name = "gpio",
762 .probe = gb_gpio_probe,
763 .remove = gb_gpio_remove,
764 .id_table = gb_gpio_id_table,
765};
766
767module_gbphy_driver(gpio_driver);
768MODULE_LICENSE("GPL v2");
769