1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * Reset Controller framework
14 #include <linux/gpio/driver.h>
15 #include <linux/gpio/machine.h>
21 #include <linux/reset.h>
22 #include <linux/reset-controller.h>
37  * struct reset_control - a reset control
38  * @rcdev: a pointer to the reset controller device
39  *         this reset control belongs to
40  * @list: list entry for the rcdev's reset controller list
41  * @id: ID of the reset controller in the reset
46  * @array: Is this an array of reset controls (1)?
47  * @deassert_count: Number of times this reset line has been deasserted
48  * @triggered_count: Number of times this reset line has been reset. Currently
65  * struct reset_control_array - an array of reset controls
66  * @base: reset control for compatibility with reset control API functions
67  * @num_rstcs: number of reset controls
68  * @rstc: array of reset controls
77  * struct reset_gpio_lookup - lookup key for ad-hoc created reset-gpio devices
78  * @of_args: phandle to the reset controller with all the args like GPIO number
88 	if (rcdev->dev)  in rcdev_name()
89 		return dev_name(rcdev->dev);  in rcdev_name()
91 	if (rcdev->of_node)  in rcdev_name()
92 		return rcdev->of_node->full_name;  in rcdev_name()
94 	if (rcdev->of_args)  in rcdev_name()
95 		return rcdev->of_args->np->full_name;  in rcdev_name()
101  * of_reset_simple_xlate - translate reset_spec to the reset line number
102  * @rcdev: a pointer to the reset controller device
103  * @reset_spec: reset line specifier as found in the device tree
106  * :c:type:`reset_controller_dev` is not set. It is useful for all reset
107  * controllers with 1:1 mapping, where reset lines can be indexed by number
113 	if (reset_spec->args[0] >= rcdev->nr_resets)  in of_reset_simple_xlate()
114 		return -EINVAL;  in of_reset_simple_xlate()
116 	return reset_spec->args[0];  in of_reset_simple_xlate()
120  * reset_controller_register - register a reset controller device
121  * @rcdev: a pointer to the initialized reset controller device
125 	if (rcdev->of_node && rcdev->of_args)  in reset_controller_register()
126 		return -EINVAL;  in reset_controller_register()
128 	if (!rcdev->of_xlate) {  in reset_controller_register()
129 		rcdev->of_reset_n_cells = 1;  in reset_controller_register()
130 		rcdev->of_xlate = of_reset_simple_xlate;  in reset_controller_register()
133 	INIT_LIST_HEAD(&rcdev->reset_control_head);  in reset_controller_register()
136 	list_add(&rcdev->list, &reset_controller_list);  in reset_controller_register()
144  * reset_controller_unregister - unregister a reset controller device
145  * @rcdev: a pointer to the reset controller device
150 	list_del(&rcdev->list);  in reset_controller_unregister()
161  * devm_reset_controller_register - resource managed reset_controller_register()
162  * @dev: device that is registering this reset controller
163  * @rcdev: a pointer to the initialized reset controller device
165  * Managed reset_controller_register(). For reset controllers registered by
178 		return -ENOMEM;  in devm_reset_controller_register()
194  * reset_controller_add_lookup - register a set of lookup entries
195  * @lookup: array of reset lookup entries
208 		if (!entry->dev_id || !entry->provider) {  in reset_controller_add_lookup()
209 			pr_warn("%s(): reset lookup entry badly specified, skipping\n",  in reset_controller_add_lookup()
214 		list_add_tail(&entry->list, &reset_lookup_list);  in reset_controller_add_lookup()
229 	for (i = 0; i < resets->num_rstcs; i++) {  in reset_control_array_reset()
230 		ret = reset_control_reset(resets->rstc[i]);  in reset_control_array_reset()
243 	for (i = 0; i < resets->num_rstcs; i++) {  in reset_control_array_rearm()
244 		rstc = resets->rstc[i];  in reset_control_array_rearm()
250 			return -EINVAL;  in reset_control_array_rearm()
252 		if (rstc->shared) {  in reset_control_array_rearm()
253 			if (WARN_ON(atomic_read(&rstc->deassert_count) != 0))  in reset_control_array_rearm()
254 				return -EINVAL;  in reset_control_array_rearm()
256 			if (!rstc->acquired)  in reset_control_array_rearm()
257 				return -EPERM;  in reset_control_array_rearm()
261 	for (i = 0; i < resets->num_rstcs; i++) {  in reset_control_array_rearm()
262 		rstc = resets->rstc[i];  in reset_control_array_rearm()
264 		if (rstc && rstc->shared)  in reset_control_array_rearm()
265 			WARN_ON(atomic_dec_return(&rstc->triggered_count) < 0);  in reset_control_array_rearm()
275 	for (i = 0; i < resets->num_rstcs; i++) {  in reset_control_array_assert()
276 		ret = reset_control_assert(resets->rstc[i]);  in reset_control_array_assert()
284 	while (i--)  in reset_control_array_assert()
285 		reset_control_deassert(resets->rstc[i]);  in reset_control_array_assert()
293 	for (i = 0; i < resets->num_rstcs; i++) {  in reset_control_array_deassert()
294 		ret = reset_control_deassert(resets->rstc[i]);  in reset_control_array_deassert()
302 	while (i--)  in reset_control_array_deassert()
303 		reset_control_assert(resets->rstc[i]);  in reset_control_array_deassert()
312 	for (i = 0; i < resets->num_rstcs; i++) {  in reset_control_array_acquire()
313 		err = reset_control_acquire(resets->rstc[i]);  in reset_control_array_acquire()
321 	while (i--)  in reset_control_array_acquire()
322 		reset_control_release(resets->rstc[i]);  in reset_control_array_acquire()
331 	for (i = 0; i < resets->num_rstcs; i++)  in reset_control_array_release()
332 		reset_control_release(resets->rstc[i]);  in reset_control_array_release()
337 	return rstc->array;  in reset_control_is_array()
341  * reset_control_reset - reset the controlled device
342  * @rstc: reset controller
344  * On a shared reset line the actual reset pulse is only triggered once for the
346  * a no-op.
347  * Consumers must not use reset_control_(de)assert on shared reset lines when
350  * If rstc is NULL it is an optional reset and the function will just
361 		return -EINVAL;  in reset_control_reset()
366 	if (!rstc->rcdev->ops->reset)  in reset_control_reset()
367 		return -ENOTSUPP;  in reset_control_reset()
369 	if (rstc->shared) {  in reset_control_reset()
370 		if (WARN_ON(atomic_read(&rstc->deassert_count) != 0))  in reset_control_reset()
371 			return -EINVAL;  in reset_control_reset()
373 		if (atomic_inc_return(&rstc->triggered_count) != 1)  in reset_control_reset()
376 		if (!rstc->acquired)  in reset_control_reset()
377 			return -EPERM;  in reset_control_reset()
380 	ret = rstc->rcdev->ops->reset(rstc->rcdev, rstc->id);  in reset_control_reset()
381 	if (rstc->shared && ret)  in reset_control_reset()
382 		atomic_dec(&rstc->triggered_count);  in reset_control_reset()
389  * reset_control_bulk_reset - reset the controlled devices in order
391  * @rstcs: array of struct reset_control_bulk_data with reset controls set
393  * Issue a reset on all provided reset controls, in order.
413  * reset_control_rearm - allow shared reset line to be re-triggered"
414  * @rstc: reset controller
416  * On a shared reset line the actual reset pulse is only triggered once for the
422  * Consumers must not use reset_control_(de)assert on shared reset lines when
433 		return -EINVAL;  in reset_control_rearm()
438 	if (rstc->shared) {  in reset_control_rearm()
439 		if (WARN_ON(atomic_read(&rstc->deassert_count) != 0))  in reset_control_rearm()
440 			return -EINVAL;  in reset_control_rearm()
442 		WARN_ON(atomic_dec_return(&rstc->triggered_count) < 0);  in reset_control_rearm()
444 		if (!rstc->acquired)  in reset_control_rearm()
445 			return -EPERM;  in reset_control_rearm()
453  * reset_control_assert - asserts the reset line
454  * @rstc: reset controller
456  * Calling this on an exclusive reset controller guarantees that the reset
457  * will be asserted. When called on a shared reset controller the line may
460  * For shared reset controls a driver cannot expect the hw's registers and
461  * internal state to be reset, but must be prepared for this to happen.
462  * Consumers must not use reset_control_reset on shared reset lines when
465  * If rstc is NULL it is an optional reset and the function will just
474 		return -EINVAL;  in reset_control_assert()
479 	if (rstc->shared) {  in reset_control_assert()
480 		if (WARN_ON(atomic_read(&rstc->triggered_count) != 0))  in reset_control_assert()
481 			return -EINVAL;  in reset_control_assert()
483 		if (WARN_ON(atomic_read(&rstc->deassert_count) == 0))  in reset_control_assert()
484 			return -EINVAL;  in reset_control_assert()
486 		if (atomic_dec_return(&rstc->deassert_count) != 0)  in reset_control_assert()
490 		 * Shared reset controls allow the reset line to be in any state  in reset_control_assert()
493 		if (!rstc->rcdev->ops->assert)  in reset_control_assert()
497 		 * If the reset controller does not implement .assert(), there  in reset_control_assert()
498 		 * is no way to guarantee that the reset line is asserted after  in reset_control_assert()
501 		if (!rstc->rcdev->ops->assert)  in reset_control_assert()
502 			return -ENOTSUPP;  in reset_control_assert()
504 		if (!rstc->acquired) {  in reset_control_assert()
505 			WARN(1, "reset %s (ID: %u) is not acquired\n",  in reset_control_assert()
506 			     rcdev_name(rstc->rcdev), rstc->id);  in reset_control_assert()
507 			return -EPERM;  in reset_control_assert()
511 	return rstc->rcdev->ops->assert(rstc->rcdev, rstc->id);  in reset_control_assert()
516  * reset_control_bulk_assert - asserts the reset lines in order
518  * @rstcs: array of struct reset_control_bulk_data with reset controls set
520  * Assert the reset lines for all provided reset controls, in order.
539 	while (i--)  in reset_control_bulk_assert()
546  * reset_control_deassert - deasserts the reset line
547  * @rstc: reset controller
549  * After calling this function, the reset is guaranteed to be deasserted.
550  * Consumers must not use reset_control_reset on shared reset lines when
553  * If rstc is NULL it is an optional reset and the function will just
562 		return -EINVAL;  in reset_control_deassert()
567 	if (rstc->shared) {  in reset_control_deassert()
568 		if (WARN_ON(atomic_read(&rstc->triggered_count) != 0))  in reset_control_deassert()
569 			return -EINVAL;  in reset_control_deassert()
571 		if (atomic_inc_return(&rstc->deassert_count) != 1)  in reset_control_deassert()
574 		if (!rstc->acquired) {  in reset_control_deassert()
575 			WARN(1, "reset %s (ID: %u) is not acquired\n",  in reset_control_deassert()
576 			     rcdev_name(rstc->rcdev), rstc->id);  in reset_control_deassert()
577 			return -EPERM;  in reset_control_deassert()
582 	 * If the reset controller does not implement .deassert(), we assume  in reset_control_deassert()
583 	 * that it handles self-deasserting reset lines via .reset(). In that  in reset_control_deassert()
584 	 * case, the reset lines are deasserted by default. If that is not the  in reset_control_deassert()
585 	 * case, the reset controller driver should implement .deassert() and  in reset_control_deassert()
586 	 * return -ENOTSUPP.  in reset_control_deassert()
588 	if (!rstc->rcdev->ops->deassert)  in reset_control_deassert()
591 	return rstc->rcdev->ops->deassert(rstc->rcdev, rstc->id);  in reset_control_deassert()
596  * reset_control_bulk_deassert - deasserts the reset lines in reverse order
598  * @rstcs: array of struct reset_control_bulk_data with reset controls set
600  * Deassert the reset lines for all provided reset controls, in reverse order.
610 	for (i = num_rstcs - 1; i >= 0; i--) {  in reset_control_bulk_deassert()
626  * reset_control_status - returns a negative errno if not supported, a
627  * positive value if the reset line is asserted, or zero if the reset
628  * line is not asserted or if the desc is NULL (optional reset).
629  * @rstc: reset controller
637 		return -EINVAL;  in reset_control_status()
639 	if (rstc->rcdev->ops->status)  in reset_control_status()
640 		return rstc->rcdev->ops->status(rstc->rcdev, rstc->id);  in reset_control_status()
642 	return -ENOTSUPP;  in reset_control_status()
647  * reset_control_acquire() - acquires a reset control for exclusive use
648  * @rstc: reset control
650  * This is used to explicitly acquire a reset control for exclusive use. Note
652  * second consumer to be able to control the reset, the first consumer has to
654  * reset_control_get_exclusive_released() to obtain an instance of the reset
655  * control. Such reset controls are not acquired by default.
657  * Consumers implementing shared access to an exclusive reset need to follow
659  * a reset they must acquire exclusive access using reset_control_acquire().
660  * After they are done operating the reset, they must release exclusive access
662  * access to the reset as long as another consumer hasn't released a reset.
674 		return -EINVAL;  in reset_control_acquire()
681 	if (rstc->acquired) {  in reset_control_acquire()
686 	list_for_each_entry(rc, &rstc->rcdev->reset_control_head, list) {  in reset_control_acquire()
687 		if (rstc != rc && rstc->id == rc->id) {  in reset_control_acquire()
688 			if (rc->acquired) {  in reset_control_acquire()
690 				return -EBUSY;  in reset_control_acquire()
695 	rstc->acquired = true;  in reset_control_acquire()
703  * reset_control_bulk_acquire - acquires reset controls for exclusive use
705  * @rstcs: array of struct reset_control_bulk_data with reset controls set
707  * This is used to explicitly acquire reset controls requested with
726 	while (i--)  in reset_control_bulk_acquire()
733  * reset_control_release() - releases exclusive access to a reset control
734  * @rstc: reset control
736  * Releases exclusive access right to a reset control previously obtained by a
750 		rstc->acquired = false;  in reset_control_release()
755  * reset_control_bulk_release() - releases exclusive access to reset controls
757  * @rstcs: array of struct reset_control_bulk_data with reset controls set
759  * Releases exclusive access right to reset controls previously obtained by a
782 	list_for_each_entry(rstc, &rcdev->reset_control_head, list) {  in __reset_control_get_internal()
783 		if (rstc->id == index) {  in __reset_control_get_internal()
787 			 * controlled reset line.  in __reset_control_get_internal()
789 			if (!rstc->shared && !shared && !acquired)  in __reset_control_get_internal()
792 			if (WARN_ON(!rstc->shared || !shared))  in __reset_control_get_internal()
793 				return ERR_PTR(-EBUSY);  in __reset_control_get_internal()
795 			kref_get(&rstc->refcnt);  in __reset_control_get_internal()
802 		return ERR_PTR(-ENOMEM);  in __reset_control_get_internal()
804 	if (!try_module_get(rcdev->owner)) {  in __reset_control_get_internal()
806 		return ERR_PTR(-ENODEV);  in __reset_control_get_internal()
809 	rstc->rcdev = rcdev;  in __reset_control_get_internal()
810 	list_add(&rstc->list, &rcdev->reset_control_head);  in __reset_control_get_internal()
811 	rstc->id = index;  in __reset_control_get_internal()
812 	kref_init(&rstc->refcnt);  in __reset_control_get_internal()
813 	rstc->acquired = acquired;  in __reset_control_get_internal()
814 	rstc->shared = shared;  in __reset_control_get_internal()
815 	get_device(rcdev->dev);  in __reset_control_get_internal()
827 	module_put(rstc->rcdev->owner);  in __reset_control_release()
829 	list_del(&rstc->list);  in __reset_control_release()
830 	put_device(rstc->rcdev->dev);  in __reset_control_release()
841 	kref_put(&rstc->refcnt, __reset_control_release);  in __reset_control_put_internal()
845 					 unsigned int gpio,  in __reset_add_reset_gpio_lookup()  argument
853 	 * Later we map GPIO flags between OF and Linux, however not all  in __reset_add_reset_gpio_lookup()
854 	 * constants from include/dt-bindings/gpio/gpio.h and  in __reset_add_reset_gpio_lookup()
855 	 * include/linux/gpio/machine.h match each other.  in __reset_add_reset_gpio_lookup()
858 		pr_err("reset-gpio code does not support GPIO flags %u for GPIO %u\n",  in __reset_add_reset_gpio_lookup()
859 		       of_flags, gpio);  in __reset_add_reset_gpio_lookup()
860 		return -EINVAL;  in __reset_add_reset_gpio_lookup()
865 		return -EPROBE_DEFER;  in __reset_add_reset_gpio_lookup()
869 		return -EINVAL;  in __reset_add_reset_gpio_lookup()
873 		return -ENOMEM;  in __reset_add_reset_gpio_lookup()
879 		return -ENOMEM;  in __reset_add_reset_gpio_lookup()
881 	lookup->dev_id = kasprintf(GFP_KERNEL, "reset-gpio.%d", id);  in __reset_add_reset_gpio_lookup()
882 	if (!lookup->dev_id)  in __reset_add_reset_gpio_lookup()
883 		return -ENOMEM;  in __reset_add_reset_gpio_lookup()
887 	lookup->table[0] = GPIO_LOOKUP(no_free_ptr(label), gpio, "reset",  in __reset_add_reset_gpio_lookup()
897  * @args:	phandle to the GPIO provider with all the args like GPIO number
906 	 * Currently only #gpio-cells=2 is supported with the meaning of:  in __reset_add_reset_gpio_device()
907 	 * args[0]: GPIO number  in __reset_add_reset_gpio_device()
908 	 * args[1]: GPIO flags  in __reset_add_reset_gpio_device()
911 	if (args->args_count != 2)  in __reset_add_reset_gpio_device()
912 		return -ENOENT;  in __reset_add_reset_gpio_device()
915 	 * Registering reset-gpio device might cause immediate  in __reset_add_reset_gpio_device()
916 	 * bind, resulting in its probe() registering new reset controller thus  in __reset_add_reset_gpio_device()
924 		if (args->np == rgpio_dev->of_args.np) {  in __reset_add_reset_gpio_device()
925 			if (of_phandle_args_equal(args, &rgpio_dev->of_args))  in __reset_add_reset_gpio_device()
937 		ret = -ENOMEM;  in __reset_add_reset_gpio_device()
941 	ret = __reset_add_reset_gpio_lookup(id, args->np, args->args[0],  in __reset_add_reset_gpio_device()
942 					    args->args[1]);  in __reset_add_reset_gpio_device()
946 	rgpio_dev->of_args = *args;  in __reset_add_reset_gpio_device()
952 	of_node_get(rgpio_dev->of_args.np);  in __reset_add_reset_gpio_device()
953 	pdev = platform_device_register_data(NULL, "reset-gpio", id,  in __reset_add_reset_gpio_device()
954 					     &rgpio_dev->of_args,  in __reset_add_reset_gpio_device()
955 					     sizeof(rgpio_dev->of_args));  in __reset_add_reset_gpio_device()
960 	list_add(&rgpio_dev->list, &reset_gpio_lookup_list);  in __reset_add_reset_gpio_device()
965 	of_node_put(rgpio_dev->of_args.np);  in __reset_add_reset_gpio_device()
983 			if (rcdev->of_args && of_phandle_args_equal(args,  in __reset_find_rcdev()
984 								    rcdev->of_args))  in __reset_find_rcdev()
987 			if (args->np == rcdev->of_node)  in __reset_find_rcdev()
1007 		return ERR_PTR(-EINVAL);  in __of_reset_control_get()
1011 						 "reset-names", id);  in __of_reset_control_get()
1012 		if (index == -EILSEQ)  in __of_reset_control_get()
1015 			return optional ? NULL : ERR_PTR(-ENOENT);  in __of_reset_control_get()
1018 	ret = of_parse_phandle_with_args(node, "resets", "#reset-cells",  in __of_reset_control_get()
1020 	if (ret == -EINVAL)  in __of_reset_control_get()
1027 		 * There can be only one reset-gpio for regular devices, so  in __of_reset_control_get()
1028 		 * don't bother with the "reset-gpios" phandle index.  in __of_reset_control_get()
1030 		ret = of_parse_phandle_with_args(node, "reset-gpios", "#gpio-cells",  in __of_reset_control_get()
1047 		rstc = ERR_PTR(-EPROBE_DEFER);  in __of_reset_control_get()
1051 	if (WARN_ON(args.args_count != rcdev->of_reset_n_cells)) {  in __of_reset_control_get()
1052 		rstc = ERR_PTR(-EINVAL);  in __of_reset_control_get()
1056 	rstc_id = rcdev->of_xlate(rcdev, &args);  in __of_reset_control_get()
1082 		if (!rcdev->dev)  in __reset_controller_by_name()
1085 		if (!strcmp(name, dev_name(rcdev->dev)))  in __reset_controller_by_name()
1104 		if (strcmp(lookup->dev_id, dev_id))  in __reset_control_get_from_lookup()
1107 		if ((!con_id && !lookup->con_id) ||  in __reset_control_get_from_lookup()
1108 		    ((con_id && lookup->con_id) &&  in __reset_control_get_from_lookup()
1109 		     !strcmp(con_id, lookup->con_id))) {  in __reset_control_get_from_lookup()
1111 			rcdev = __reset_controller_by_name(lookup->provider);  in __reset_control_get_from_lookup()
1115 				/* Reset provider may not be ready yet. */  in __reset_control_get_from_lookup()
1116 				return ERR_PTR(-EPROBE_DEFER);  in __reset_control_get_from_lookup()
1120 							    lookup->index,  in __reset_control_get_from_lookup()
1130 		return optional ? NULL : ERR_PTR(-ENOENT);  in __reset_control_get_from_lookup()
1140 		return ERR_PTR(-EINVAL);  in __reset_control_get()
1142 	if (dev->of_node)  in __reset_control_get()
1143 		return __of_reset_control_get(dev->of_node, id, index, shared,  in __reset_control_get()
1170 	while (i--)  in __reset_control_bulk_get()
1182 	for (i = 0; i < resets->num_rstcs; i++)  in reset_control_array_put()
1183 		__reset_control_put_internal(resets->rstc[i]);  in reset_control_array_put()
1189  * reset_control_put - free the reset controller
1190  * @rstc: reset controller
1209  * reset_control_bulk_put - free the reset controllers
1211  * @rstcs: array of struct reset_control_bulk_data with reset controls set
1216 	while (num_rstcs--)  in reset_control_bulk_put()
1236 		return ERR_PTR(-ENOMEM);  in __devm_reset_control_get()
1260 	reset_control_bulk_put(devres->num_rstcs, devres->rstcs);  in devm_reset_control_bulk_release()
1273 		return -ENOMEM;  in __devm_reset_control_bulk_get()
1281 	ptr->num_rstcs = num_rstcs;  in __devm_reset_control_bulk_get()
1282 	ptr->rstcs = rstcs;  in __devm_reset_control_bulk_get()
1290  * __device_reset - find reset controller associated with the device
1291  *                  and perform reset
1292  * @dev: device to be reset by the controller
1293  * @optional: whether it is optional to reset the device
1296  * This is useful for the common case of devices with single, dedicated reset
1309 			return optional ? 0 : -ENOENT;  in __device_reset()
1312 			return -EIO;  in __device_reset()
1329  * APIs to manage an array of reset controls.
1333  * of_reset_control_get_count - Count number of resets available with a device
1337  * Returns positive reset count on success, or error number on failure and
1345 		return -EINVAL;  in of_reset_control_get_count()
1347 	count = of_count_phandle_with_args(node, "resets", "#reset-cells");  in of_reset_control_get_count()
1349 		count = -ENOENT;  in of_reset_control_get_count()
1355  * of_reset_control_array_get - Get a list of reset controls using
1358  * @np: device node for the device that requests the reset controls array
1359  * @shared: whether reset controls are shared or not
1360  * @optional: whether it is optional to get the reset controls
1361  * @acquired: only one reset control may be acquired for a given controller
1380 		return ERR_PTR(-ENOMEM);  in of_reset_control_array_get()
1381 	resets->num_rstcs = num;  in of_reset_control_array_get()
1388 		resets->rstc[i] = rstc;  in of_reset_control_array_get()
1390 	resets->base.array = true;  in of_reset_control_array_get()
1392 	return &resets->base;  in of_reset_control_array_get()
1396 	while (--i >= 0)  in of_reset_control_array_get()
1397 		__reset_control_put_internal(resets->rstc[i]);  in of_reset_control_array_get()
1407  * devm_reset_control_array_get - Resource managed reset control array get
1409  * @dev: device that requests the list of reset controls
1410  * @shared: whether reset controls are shared or not
1411  * @optional: whether it is optional to get the reset controls
1413  * The reset control array APIs are intended for a list of resets
1427 		return ERR_PTR(-ENOMEM);  in devm_reset_control_array_get()
1429 	rstc = of_reset_control_array_get(dev->of_node, shared, optional, true);  in devm_reset_control_array_get()
1449 		return -EINVAL;  in reset_control_get_count_from_lookup()
1455 		if (!strcmp(lookup->dev_id, dev_id))  in reset_control_get_count_from_lookup()
1462 		count = -ENOENT;  in reset_control_get_count_from_lookup()
1468  * reset_control_get_count - Count number of resets available with a device
1472  * Returns positive reset count on success, or error number on failure and
1477 	if (dev->of_node)  in reset_control_get_count()
1478 		return of_reset_control_get_count(dev->of_node);  in reset_control_get_count()