drivers/gpio/gpio-aggregator.c

65 	/* Custom name for the virtual line */
67 	/* GPIO chip label or line name */
69 	/* Can be negative to indicate lookup by line name */
158 	struct gpio_aggregator_line *line;
160 	line = kzalloc(sizeof(*line), GFP_KERNEL);
161 	if (!line)
165 		line->key = kstrdup(key, GFP_KERNEL);
166 		if (!line->key) {
167 			kfree(line);
172 	line->flags = GPIO_LOOKUP_FLAGS_DEFAULT;
173 	line->parent = parent;
174 	line->idx = idx;
175 	line->offset = offset;
176 	INIT_LIST_HEAD(&line->entry);
178 	return line;
182 				     struct gpio_aggregator_line *line)
189 		if (tmp->idx > line->idx) {
190 			list_add_tail(&line->entry, &tmp->entry);
194 	list_add_tail(&line->entry, &aggr->list_head);
198 				     struct gpio_aggregator_line *line)
202 	list_del(&line->entry);
207 	struct gpio_aggregator_line *line, *tmp;
209 	list_for_each_entry_safe(line, tmp, &aggr->list_head, entry) {
210 		configfs_unregister_group(&line->group);
222 			gpio_aggregator_line_del(aggr, line);
223 		kfree(line->key);
224 		kfree(line->name);
225 		kfree(line);
440 	u32 line;
445 	line = gpiospec->args[0];
446 	if (line >= chip->ngpio)
449 	timings = &fwd->delay_timings[line];
453 	return line;
586 	struct gpio_aggregator_line *line;
602 	list_for_each_entry(line, &aggr->list_head, entry)
603 		line_names[n++] = line->name ?: "";
606 					"gpio-line-names",
615 	struct gpio_aggregator_line *line;
640 	list_for_each_entry(line, &aggr->list_head, entry) {
642 		 * - Either GPIO chip label or line name must be configured
643 		 *   (i.e. line->key must be non-NULL)
647 		if (!line->key || line->idx != n) {
652 		if (line->offset < 0)
653 			ret = gpio_aggregator_add_gpio(aggr, line->key,
656 			ret = gpio_aggregator_add_gpio(aggr, line->key,
657 						       line->offset, &n);
699 	struct gpio_aggregator_line *line;
706 	list_for_each_entry(line, &aggr->list_head, entry) {
709 					subsys, &line->group.cg_item);
712 					&line->group.cg_item);
719 	struct gpio_aggregator_line *line = to_gpio_aggregator_line(item);
720 	struct gpio_aggregator *aggr = line->parent;
724 	return sysfs_emit(page, "%s\n", line->key ?: "");
731 	struct gpio_aggregator_line *line = to_gpio_aggregator_line(item);
732 	struct gpio_aggregator *aggr = line->parent;
747 	kfree(line->key);
748 	line->key = no_free_ptr(key);
757 	struct gpio_aggregator_line *line = to_gpio_aggregator_line(item);
758 	struct gpio_aggregator *aggr = line->parent;
762 	return sysfs_emit(page, "%s\n", line->name ?: "");
769 	struct gpio_aggregator_line *line = to_gpio_aggregator_line(item);
770 	struct gpio_aggregator *aggr = line->parent;
785 	kfree(line->name);
786 	line->name = no_free_ptr(name);
795 	struct gpio_aggregator_line *line = to_gpio_aggregator_line(item);
796 	struct gpio_aggregator *aggr = line->parent;
800 	return sysfs_emit(page, "%d\n", line->offset);
807 	struct gpio_aggregator_line *line = to_gpio_aggregator_line(item);
808 	struct gpio_aggregator *aggr = line->parent;
816 	 * When offset == -1, 'key' represents a line name to lookup.
818 	 * the 'offset' value representing the line within that chip.
820 	 * GPIOLIB uses the U16_MAX value to indicate lookup by line name so
832 	line->offset = offset;
922 	struct gpio_aggregator_line *line = to_gpio_aggregator_line(item);
923 	struct gpio_aggregator *aggr = line->parent;
927 	gpio_aggregator_line_del(aggr, line);
928 	kfree(line->key);
929 	kfree(line->name);
930 	kfree(line);
962 	struct gpio_aggregator_line *line;
966 	ret = sscanf(name, "line%u%n", &idx, &nchar);
984 	list_for_each_entry(line, &aggr->list_head, entry)
985 		if (line->idx == idx)
988 	line = gpio_aggregator_line_alloc(aggr, idx, NULL, -1);
989 	if (IS_ERR(line))
990 		return ERR_CAST(line);
992 	config_group_init_type_name(&line->group, name, &gpio_aggregator_line_type);
994 	gpio_aggregator_line_add(aggr, line);
996 	return &line->group;
1059 	struct gpio_aggregator_line *line;
1076 			/* Named GPIO line */
1077 			scnprintf(name, sizeof(name), "line%u", n);
1078 			line = gpio_aggregator_line_alloc(aggr, n, key, -1);
1079 			if (IS_ERR(line)) {
1080 				error = PTR_ERR(line);
1083 			config_group_init_type_name(&line->group, name,
1086 							&line->group);
1090 				gpio_aggregator_line_add(aggr, line);
1108 			scnprintf(name, sizeof(name), "line%u", n);
1109 			line = gpio_aggregator_line_alloc(aggr, n, key, i);
1110 			if (IS_ERR(line)) {
1111 				error = PTR_ERR(line);
1114 			config_group_init_type_name(&line->group, name,
1117 							&line->group);
1121 				gpio_aggregator_line_add(aggr, line);