1 // SPDX-License-Identifier: GPL-2.0
20 #include "counter-sysfs.h"
28  * struct counter_attribute - Counter sysfs attribute
31  * @comp:	Counter component callbacks and data
39 	struct counter_comp comp;  member
48  * struct counter_attribute_group - container for attribute group
62 	[COUNTER_FUNCTION_PULSE_DIRECTION] = "pulse-direction",
90 	[COUNTER_COUNT_MODE_NON_RECYCLE] = "non-recycle",
91 	[COUNTER_COUNT_MODE_MODULO_N] = "modulo-n",
93 	[COUNTER_COUNT_MODE_HARDWARE_RETRIGGERABLE_ONESHOT] = "hardware retriggerable one-shot",
110 	int err;  in counter_comp_u8_show()
113 	switch (a->scope) {  in counter_comp_u8_show()
115 		err = a->comp.device_u8_read(counter, &data);  in counter_comp_u8_show()
118 		err = a->comp.signal_u8_read(counter, a->parent, &data);  in counter_comp_u8_show()
121 		err = a->comp.count_u8_read(counter, a->parent, &data);  in counter_comp_u8_show()
124 		return -EINVAL;  in counter_comp_u8_show()
129 	if (a->comp.type == COUNTER_COMP_BOOL)  in counter_comp_u8_show()
133 	return sysfs_emit(buf, "%u\n", (unsigned int)data);  in counter_comp_u8_show()
142 	int err;  in counter_comp_u8_store()
146 	if (a->comp.type == COUNTER_COMP_BOOL) {  in counter_comp_u8_store()
154 	switch (a->scope) {  in counter_comp_u8_store()
156 		err = a->comp.device_u8_write(counter, data);  in counter_comp_u8_store()
159 		err = a->comp.signal_u8_write(counter, a->parent, data);  in counter_comp_u8_store()
162 		err = a->comp.count_u8_write(counter, a->parent, data);  in counter_comp_u8_store()
165 		return -EINVAL;  in counter_comp_u8_store()
178 	const struct counter_available *const avail = a->comp.priv;  in counter_comp_u32_show()
179 	int err;  in counter_comp_u32_show()
182 	switch (a->scope) {  in counter_comp_u32_show()
184 		err = a->comp.device_u32_read(counter, &data);  in counter_comp_u32_show()
187 		err = a->comp.signal_u32_read(counter, a->parent, &data);  in counter_comp_u32_show()
190 		if (a->comp.type == COUNTER_COMP_SYNAPSE_ACTION)  in counter_comp_u32_show()
191 			err = a->comp.action_read(counter, a->parent,  in counter_comp_u32_show()
192 						  a->comp.priv, &data);  in counter_comp_u32_show()
194 			err = a->comp.count_u32_read(counter, a->parent, &data);  in counter_comp_u32_show()
197 		return -EINVAL;  in counter_comp_u32_show()
202 	switch (a->comp.type) {  in counter_comp_u32_show()
210 		return sysfs_emit(buf, "%s\n", avail->strs[data]);  in counter_comp_u32_show()
218 		return sysfs_emit(buf, "%u\n", (unsigned int)data);  in counter_comp_u32_show()
222 static int counter_find_enum(u32 *const enum_item, const u32 *const enums,  in counter_find_enum()
234 	return -EINVAL;  in counter_find_enum()
243 	struct counter_count *const count = a->parent;  in counter_comp_u32_store()
244 	struct counter_synapse *const synapse = a->comp.priv;  in counter_comp_u32_store()
245 	const struct counter_available *const avail = a->comp.priv;  in counter_comp_u32_store()
246 	int err;  in counter_comp_u32_store()
249 	switch (a->comp.type) {  in counter_comp_u32_store()
251 		err = counter_find_enum(&data, count->functions_list,  in counter_comp_u32_store()
252 					count->num_functions, buf,  in counter_comp_u32_store()
256 		err = counter_find_enum(&data, synapse->actions_list,  in counter_comp_u32_store()
257 					synapse->num_actions, buf,  in counter_comp_u32_store()
261 		err = __sysfs_match_string(avail->strs, avail->num_items, buf);  in counter_comp_u32_store()
265 		err = counter_find_enum(&data, avail->enums, avail->num_items,  in counter_comp_u32_store()
269 		err = counter_find_enum(&data, avail->enums, avail->num_items,  in counter_comp_u32_store()
279 	switch (a->scope) {  in counter_comp_u32_store()
281 		err = a->comp.device_u32_write(counter, data);  in counter_comp_u32_store()
284 		err = a->comp.signal_u32_write(counter, a->parent, data);  in counter_comp_u32_store()
287 		if (a->comp.type == COUNTER_COMP_SYNAPSE_ACTION)  in counter_comp_u32_store()
288 			err = a->comp.action_write(counter, count, synapse,  in counter_comp_u32_store()
291 			err = a->comp.count_u32_write(counter, count, data);  in counter_comp_u32_store()
294 		return -EINVAL;  in counter_comp_u32_store()
307 	int err;  in counter_comp_u64_show()
310 	switch (a->scope) {  in counter_comp_u64_show()
312 		err = a->comp.device_u64_read(counter, &data);  in counter_comp_u64_show()
315 		err = a->comp.signal_u64_read(counter, a->parent, &data);  in counter_comp_u64_show()
318 		err = a->comp.count_u64_read(counter, a->parent, &data);  in counter_comp_u64_show()
321 		return -EINVAL;  in counter_comp_u64_show()
335 	int err;  in counter_comp_u64_store()
342 	switch (a->scope) {  in counter_comp_u64_store()
344 		err = a->comp.device_u64_write(counter, data);  in counter_comp_u64_store()
347 		err = a->comp.signal_u64_write(counter, a->parent, data);  in counter_comp_u64_store()
350 		err = a->comp.count_u64_write(counter, a->parent, data);  in counter_comp_u64_store()
353 		return -EINVAL;  in counter_comp_u64_store()
367 	const struct counter_array *const element = a->comp.priv;  in counter_comp_array_u32_show()
368 	int err;  in counter_comp_array_u32_show()
371 	if (a->scope != COUNTER_SCOPE_SIGNAL ||  in counter_comp_array_u32_show()
372 	    element->type != COUNTER_COMP_SIGNAL_POLARITY)  in counter_comp_array_u32_show()
373 		return -EINVAL;  in counter_comp_array_u32_show()
375 	err = a->comp.signal_array_u32_read(counter, a->parent, element->idx,  in counter_comp_array_u32_show()
389 	const struct counter_array *const element = a->comp.priv;  in counter_comp_array_u32_store()
390 	int err;  in counter_comp_array_u32_store()
393 	if (element->type != COUNTER_COMP_SIGNAL_POLARITY ||  in counter_comp_array_u32_store()
394 	    a->scope != COUNTER_SCOPE_SIGNAL)  in counter_comp_array_u32_store()
395 		return -EINVAL;  in counter_comp_array_u32_store()
397 	err = counter_find_enum(&data, element->avail->enums,  in counter_comp_array_u32_store()
398 				element->avail->num_items, buf,  in counter_comp_array_u32_store()
403 	err = a->comp.signal_array_u32_write(counter, a->parent, element->idx,  in counter_comp_array_u32_store()
417 	const struct counter_array *const element = a->comp.priv;  in counter_comp_array_u64_show()
418 	int err;  in counter_comp_array_u64_show()
421 	switch (a->scope) {  in counter_comp_array_u64_show()
423 		err = a->comp.device_array_u64_read(counter, element->idx,  in counter_comp_array_u64_show()
427 		err = a->comp.signal_array_u64_read(counter, a->parent,  in counter_comp_array_u64_show()
428 						    element->idx, &data);  in counter_comp_array_u64_show()
431 		err = a->comp.count_array_u64_read(counter, a->parent,  in counter_comp_array_u64_show()
432 						   element->idx, &data);  in counter_comp_array_u64_show()
435 		return -EINVAL;  in counter_comp_array_u64_show()
449 	const struct counter_array *const element = a->comp.priv;  in counter_comp_array_u64_store()
450 	int err;  in counter_comp_array_u64_store()
457 	switch (a->scope) {  in counter_comp_array_u64_store()
459 		err = a->comp.device_array_u64_write(counter, element->idx,  in counter_comp_array_u64_store()
463 		err = a->comp.signal_array_u64_write(counter, a->parent,  in counter_comp_array_u64_store()
464 						     element->idx, data);  in counter_comp_array_u64_store()
467 		err = a->comp.count_array_u64_write(counter, a->parent,  in counter_comp_array_u64_store()
468 						    element->idx, data);  in counter_comp_array_u64_store()
471 		return -EINVAL;  in counter_comp_array_u64_store()
498 	for (index = 0; index < avail->num_items; index++)  in strs_available_show()
499 		len += sysfs_emit_at(buf, len, "%s\n", avail->strs[index]);  in strs_available_show()
509 	const struct counter_count *const count = a->parent;  in counter_comp_available_show()
510 	const struct counter_synapse *const synapse = a->comp.priv;  in counter_comp_available_show()
511 	const struct counter_available *const avail = a->comp.priv;  in counter_comp_available_show()
513 	switch (a->comp.type) {  in counter_comp_available_show()
515 		return enums_available_show(count->functions_list,  in counter_comp_available_show()
516 					    count->num_functions,  in counter_comp_available_show()
519 		return enums_available_show(synapse->actions_list,  in counter_comp_available_show()
520 					    synapse->num_actions,  in counter_comp_available_show()
525 		return enums_available_show(avail->enums, avail->num_items,  in counter_comp_available_show()
528 		return -EINVAL;  in counter_comp_available_show()
532 static int counter_avail_attr_create(struct device *const dev,  in counter_avail_attr_create()
534 	const struct counter_comp *const comp, void *const parent)  in counter_avail_attr_create()  argument
541 		return -ENOMEM;  in counter_avail_attr_create()
544 	counter_attr->comp.type = comp->type;  in counter_avail_attr_create()
545 	counter_attr->comp.priv = comp->priv;  in counter_avail_attr_create()
546 	counter_attr->parent = parent;  in counter_avail_attr_create()
549 	dev_attr = &counter_attr->dev_attr;  in counter_avail_attr_create()
550 	sysfs_attr_init(&dev_attr->attr);  in counter_avail_attr_create()
553 	dev_attr->attr.name = devm_kasprintf(dev, GFP_KERNEL, "%s_available",  in counter_avail_attr_create()
554 					     comp->name);  in counter_avail_attr_create()
555 	if (!dev_attr->attr.name)  in counter_avail_attr_create()
556 		return -ENOMEM;  in counter_avail_attr_create()
557 	dev_attr->attr.mode = 0444;  in counter_avail_attr_create()
558 	dev_attr->show = counter_comp_available_show;  in counter_avail_attr_create()
561 	list_add(&counter_attr->l, &group->attr_list);  in counter_avail_attr_create()
562 	group->num_attr++;  in counter_avail_attr_create()
567 static int counter_attr_create(struct device *const dev,  in counter_attr_create()
569 			       const struct counter_comp *const comp,  in counter_attr_create()  argument
573 	const struct counter_array *const array = comp->priv;  in counter_attr_create()
579 		return -ENOMEM;  in counter_attr_create()
582 	counter_attr->comp = *comp;  in counter_attr_create()
583 	counter_attr->scope = scope;  in counter_attr_create()
584 	counter_attr->parent = parent;  in counter_attr_create()
587 	dev_attr = &counter_attr->dev_attr;  in counter_attr_create()
588 	sysfs_attr_init(&dev_attr->attr);  in counter_attr_create()
589 	dev_attr->attr.name = comp->name;  in counter_attr_create()
590 	switch (comp->type) {  in counter_attr_create()
593 		if (comp->device_u8_read) {  in counter_attr_create()
594 			dev_attr->attr.mode |= 0444;  in counter_attr_create()
595 			dev_attr->show = counter_comp_u8_show;  in counter_attr_create()
597 		if (comp->device_u8_write) {  in counter_attr_create()
598 			dev_attr->attr.mode |= 0200;  in counter_attr_create()
599 			dev_attr->store = counter_comp_u8_store;  in counter_attr_create()
609 		if (comp->device_u32_read) {  in counter_attr_create()
610 			dev_attr->attr.mode |= 0444;  in counter_attr_create()
611 			dev_attr->show = counter_comp_u32_show;  in counter_attr_create()
613 		if (comp->device_u32_write) {  in counter_attr_create()
614 			dev_attr->attr.mode |= 0200;  in counter_attr_create()
615 			dev_attr->store = counter_comp_u32_store;  in counter_attr_create()
619 		if (comp->device_u64_read) {  in counter_attr_create()
620 			dev_attr->attr.mode |= 0444;  in counter_attr_create()
621 			dev_attr->show = counter_comp_u64_show;  in counter_attr_create()
623 		if (comp->device_u64_write) {  in counter_attr_create()
624 			dev_attr->attr.mode |= 0200;  in counter_attr_create()
625 			dev_attr->store = counter_comp_u64_store;  in counter_attr_create()
629 		switch (array->type) {  in counter_attr_create()
631 			if (comp->signal_array_u32_read) {  in counter_attr_create()
632 				dev_attr->attr.mode |= 0444;  in counter_attr_create()
633 				dev_attr->show = counter_comp_array_u32_show;  in counter_attr_create()
635 			if (comp->signal_array_u32_write) {  in counter_attr_create()
636 				dev_attr->attr.mode |= 0200;  in counter_attr_create()
637 				dev_attr->store = counter_comp_array_u32_store;  in counter_attr_create()
641 			if (comp->device_array_u64_read) {  in counter_attr_create()
642 				dev_attr->attr.mode |= 0444;  in counter_attr_create()
643 				dev_attr->show = counter_comp_array_u64_show;  in counter_attr_create()
645 			if (comp->device_array_u64_write) {  in counter_attr_create()
646 				dev_attr->attr.mode |= 0200;  in counter_attr_create()
647 				dev_attr->store = counter_comp_array_u64_store;  in counter_attr_create()
651 			return -EINVAL;  in counter_attr_create()
655 		return -EINVAL;  in counter_attr_create()
659 	list_add(&counter_attr->l, &group->attr_list);  in counter_attr_create()
660 	group->num_attr++;  in counter_attr_create()
663 	switch (comp->type) {  in counter_attr_create()
668 		return counter_avail_attr_create(dev, group, comp, parent);  in counter_attr_create()
677 	return sysfs_emit(buf, "%s\n", to_counter_attribute(attr)->comp.name);  in counter_comp_name_show()
680 static int counter_name_attr_create(struct device *const dev,  in counter_name_attr_create()
688 		return -ENOMEM;  in counter_name_attr_create()
691 	counter_attr->comp.name = name;  in counter_name_attr_create()
694 	sysfs_attr_init(&counter_attr->dev_attr.attr);  in counter_name_attr_create()
695 	counter_attr->dev_attr.attr.name = "name";  in counter_name_attr_create()
696 	counter_attr->dev_attr.attr.mode = 0444;  in counter_name_attr_create()
697 	counter_attr->dev_attr.show = counter_comp_name_show;  in counter_name_attr_create()
700 	list_add(&counter_attr->l, &group->attr_list);  in counter_name_attr_create()
701 	group->num_attr++;  in counter_name_attr_create()
709 	const size_t id = (size_t)to_counter_attribute(attr)->comp.priv;  in counter_comp_id_show()
714 static int counter_comp_id_attr_create(struct device *const dev,  in counter_comp_id_attr_create()
723 		return -ENOMEM;  in counter_comp_id_attr_create()
728 		return -ENOMEM;  in counter_comp_id_attr_create()
731 	counter_attr->comp.priv = (void *)id;  in counter_comp_id_attr_create()
734 	sysfs_attr_init(&counter_attr->dev_attr.attr);  in counter_comp_id_attr_create()
735 	counter_attr->dev_attr.attr.name = name;  in counter_comp_id_attr_create()
736 	counter_attr->dev_attr.attr.mode = 0444;  in counter_comp_id_attr_create()
737 	counter_attr->dev_attr.show = counter_comp_id_show;  in counter_comp_id_attr_create()
740 	list_add(&counter_attr->l, &group->attr_list);  in counter_comp_id_attr_create()
741 	group->num_attr++;  in counter_comp_id_attr_create()
746 static int counter_ext_attrs_create(struct device *const dev,  in counter_ext_attrs_create()
752 	int err;  in counter_ext_attrs_create()
760 	return counter_comp_id_attr_create(dev, group, ext->name, id);  in counter_ext_attrs_create()
763 static int counter_array_attrs_create(struct device *const dev,  in counter_array_attrs_create()
765 				      const struct counter_comp *const comp,  in counter_array_attrs_create()  argument
769 	const struct counter_array *const array = comp->priv;  in counter_array_attrs_create()
770 	struct counter_comp ext = *comp;  in counter_array_attrs_create()
773 	int err;  in counter_array_attrs_create()
776 	for (idx = 0; idx < array->length; idx++) {  in counter_array_attrs_create()
778 		ext.name = devm_kasprintf(dev, GFP_KERNEL, "%s%zu", comp->name,  in counter_array_attrs_create()
781 			return -ENOMEM;  in counter_array_attrs_create()
786 			return -ENOMEM;  in counter_array_attrs_create()
787 		element->type = array->type;  in counter_array_attrs_create()
788 		element->avail = array->avail;  in counter_array_attrs_create()
789 		element->idx = idx;  in counter_array_attrs_create()
802 static int counter_sysfs_exts_add(struct device *const dev,  in counter_sysfs_exts_add()
811 	int err;  in counter_sysfs_exts_add()
818 		if (ext->type == COUNTER_COMP_ARRAY) {  in counter_sysfs_exts_add()
821 			array = ext->priv;  in counter_sysfs_exts_add()
822 			id += array->length;  in counter_sysfs_exts_add()
840 static int counter_signal_attrs_create(struct counter_device *const counter,  in counter_signal_attrs_create()
845 	struct device *const dev = &counter->dev;  in counter_signal_attrs_create()
846 	int err;  in counter_signal_attrs_create()
847 	struct counter_comp comp;  in counter_signal_attrs_create()  local
850 	comp = counter_signal_comp;  in counter_signal_attrs_create()
851 	comp.signal_u32_read = counter->ops->signal_read;  in counter_signal_attrs_create()
852 	err = counter_attr_create(dev, cattr_group, &comp, scope, signal);  in counter_signal_attrs_create()
857 	err = counter_name_attr_create(dev, cattr_group, signal->name);  in counter_signal_attrs_create()
862 	return counter_sysfs_exts_add(dev, cattr_group, signal->ext,  in counter_signal_attrs_create()
863 				      signal->num_ext, scope, signal);  in counter_signal_attrs_create()
866 static int counter_sysfs_signals_add(struct counter_device *const counter,  in counter_sysfs_signals_add()
870 	int err;  in counter_sysfs_signals_add()
873 	for (i = 0; i < counter->num_signals; i++) {  in counter_sysfs_signals_add()
875 		groups[i].name = devm_kasprintf(&counter->dev, GFP_KERNEL,  in counter_sysfs_signals_add()
878 			return -ENOMEM;  in counter_sysfs_signals_add()
882 						  counter->signals + i);  in counter_sysfs_signals_add()
890 static int counter_sysfs_synapses_add(struct counter_device *const counter,  in counter_sysfs_synapses_add()
897 	for (i = 0; i < count->num_synapses; i++) {  in counter_sysfs_synapses_add()
898 		struct device *const dev = &counter->dev;  in counter_sysfs_synapses_add()
901 		struct counter_comp comp;  in counter_sysfs_synapses_add()  local
902 		int err;  in counter_sysfs_synapses_add()
904 		synapse = count->synapses + i;  in counter_sysfs_synapses_add()
907 		id = synapse->signal - counter->signals;  in counter_sysfs_synapses_add()
908 		comp.name = devm_kasprintf(dev, GFP_KERNEL, "signal%zu_action",  in counter_sysfs_synapses_add()
910 		if (!comp.name)  in counter_sysfs_synapses_add()
911 			return -ENOMEM;  in counter_sysfs_synapses_add()
914 		comp.type = COUNTER_COMP_SYNAPSE_ACTION;  in counter_sysfs_synapses_add()
915 		comp.action_read = counter->ops->action_read;  in counter_sysfs_synapses_add()
916 		comp.action_write = counter->ops->action_write;  in counter_sysfs_synapses_add()
917 		comp.priv = synapse;  in counter_sysfs_synapses_add()
918 		err = counter_attr_create(dev, group, &comp,  in counter_sysfs_synapses_add()
924 		err = counter_comp_id_attr_create(dev, group, comp.name, i);  in counter_sysfs_synapses_add()
940 static int counter_count_attrs_create(struct counter_device *const counter,  in counter_count_attrs_create()
945 	struct device *const dev = &counter->dev;  in counter_count_attrs_create()
946 	int err;  in counter_count_attrs_create()
947 	struct counter_comp comp;  in counter_count_attrs_create()  local
950 	comp = counter_count_comp;  in counter_count_attrs_create()
951 	comp.count_u64_read = counter->ops->count_read;  in counter_count_attrs_create()
952 	comp.count_u64_write = counter->ops->count_write;  in counter_count_attrs_create()
953 	err = counter_attr_create(dev, cattr_group, &comp, scope, count);  in counter_count_attrs_create()
958 	err = counter_name_attr_create(dev, cattr_group, count->name);  in counter_count_attrs_create()
963 	comp = counter_function_comp;  in counter_count_attrs_create()
964 	comp.count_u32_read = counter->ops->function_read;  in counter_count_attrs_create()
965 	comp.count_u32_write = counter->ops->function_write;  in counter_count_attrs_create()
966 	err = counter_attr_create(dev, cattr_group, &comp, scope, count);  in counter_count_attrs_create()
971 	return counter_sysfs_exts_add(dev, cattr_group, count->ext,  in counter_count_attrs_create()
972 				      count->num_ext, scope, count);  in counter_count_attrs_create()
975 static int counter_sysfs_counts_add(struct counter_device *const counter,  in counter_sysfs_counts_add()
980 	int err;  in counter_sysfs_counts_add()
983 	for (i = 0; i < counter->num_counts; i++) {  in counter_sysfs_counts_add()
984 		count = counter->counts + i;  in counter_sysfs_counts_add()
987 		groups[i].name = devm_kasprintf(&counter->dev, GFP_KERNEL,  in counter_sysfs_counts_add()
990 			return -ENOMEM;  in counter_sysfs_counts_add()
1006 static int counter_num_signals_read(struct counter_device *counter, u8 *val)  in counter_num_signals_read()
1008 	*val = counter->num_signals;  in counter_num_signals_read()
1012 static int counter_num_counts_read(struct counter_device *counter, u8 *val)  in counter_num_counts_read()
1014 	*val = counter->num_counts;  in counter_num_counts_read()
1018 static int counter_events_queue_size_read(struct counter_device *counter,  in counter_events_queue_size_read()
1021 	*val = kfifo_size(&counter->events);  in counter_events_queue_size_read()
1025 static int counter_events_queue_size_write(struct counter_device *counter,  in counter_events_queue_size_write()
1029 	int err;  in counter_events_queue_size_write()
1038 	mutex_lock(&counter->events_out_lock);  in counter_events_queue_size_write()
1039 	spin_lock_irqsave(&counter->events_in_lock, flags);  in counter_events_queue_size_write()
1040 	kfifo_free(&counter->events);  in counter_events_queue_size_write()
1041 	counter->events.kfifo = events.kfifo;  in counter_events_queue_size_write()
1042 	spin_unlock_irqrestore(&counter->events_in_lock, flags);  in counter_events_queue_size_write()
1043 	mutex_unlock(&counter->events_out_lock);  in counter_events_queue_size_write()
1059 static int counter_sysfs_attr_add(struct counter_device *const counter,  in counter_sysfs_attr_add()
1063 	struct device *const dev = &counter->dev;  in counter_sysfs_attr_add()
1064 	int err;  in counter_sysfs_attr_add()
1070 	cattr_group += counter->num_signals;  in counter_sysfs_attr_add()
1076 	cattr_group += counter->num_counts;  in counter_sysfs_attr_add()
1079 	err = counter_name_attr_create(dev, cattr_group, counter->name);  in counter_sysfs_attr_add()
1102 	return counter_sysfs_exts_add(dev, cattr_group, counter->ext,  in counter_sysfs_attr_add()
1103 				      counter->num_ext, scope, NULL);  in counter_sysfs_attr_add()
1109  * counter_sysfs_add - Adds Counter sysfs attributes to the device structure
1113  * structure for later registration to the system. Resource-managed memory
1118 int counter_sysfs_add(struct counter_device *const counter)  in counter_sysfs_add()
1120 	struct device *const dev = &counter->dev;  in counter_sysfs_add()
1121 	const size_t num_groups = counter->num_signals + counter->num_counts + 1;  in counter_sysfs_add()
1124 	int err;  in counter_sysfs_add()
1132 		return -ENOMEM;  in counter_sysfs_add()
1144 	dev->groups = devm_kcalloc(dev, num_groups + 1, sizeof(*dev->groups),  in counter_sysfs_add()
1146 	if (!dev->groups)  in counter_sysfs_add()
1147 		return -ENOMEM;  in counter_sysfs_add()
1152 		return -ENOMEM;  in counter_sysfs_add()
1164 			return -ENOMEM;  in counter_sysfs_add()
1169 			groups[i].attrs[j++] = &p->dev_attr.attr;  in counter_sysfs_add()
1172 		dev->groups[i] = &groups[i];  in counter_sysfs_add()