drivers/gpio/gpiolib-sysfs.c

36 	struct gpio_desc *desc;
77 	struct gpio_desc *desc = data->desc;
82 	gpiod_get_direction(desc);
83 	value = !!test_bit(FLAG_IS_OUT, &desc->flags);
94 	struct gpio_desc *desc = data->desc;
100 		status = gpiod_direction_output_raw(desc, 1);
102 		status = gpiod_direction_output_raw(desc, 0);
104 		status = gpiod_direction_input(desc);
118 	struct gpio_desc *desc = data->desc;
123 	status = gpiod_get_value_cansleep(desc);
137 	struct gpio_desc *desc = data->desc;
145 	if (!test_bit(FLAG_IS_OUT, &desc->flags)) {
148 		gpiod_set_value_cansleep(desc, value);
171 	struct gpio_desc *desc = data->desc;
175 	CLASS(gpio_chip_guard, guard)(desc);
179 	data->irq = gpiod_to_irq(desc);
189 		irq_flags |= test_bit(FLAG_ACTIVE_LOW, &desc->flags) ?
192 		irq_flags |= test_bit(FLAG_ACTIVE_LOW, &desc->flags) ?
203 	ret = gpiochip_lock_as_irq(guard.gc, gpio_chip_hwgpio(desc));
217 	gpiochip_unlock_as_irq(guard.gc, gpio_chip_hwgpio(desc));
231 	struct gpio_desc *desc = data->desc;
233 	CLASS(gpio_chip_guard, guard)(desc);
239 	gpiochip_unlock_as_irq(guard.gc, gpio_chip_hwgpio(desc));
307 	struct gpio_desc *desc = data->desc;
311 	if (!!test_bit(FLAG_ACTIVE_LOW, &desc->flags) == !!value)
314 	assign_bit(FLAG_ACTIVE_LOW, &desc->flags, value);
330 	struct gpio_desc *desc = data->desc;
335 	value = !!test_bit(FLAG_ACTIVE_LOW, &desc->flags);
368 	struct gpio_desc *desc = data->desc;
376 		if (gpiod_to_irq(desc) < 0)
378 		if (!show_direction && test_bit(FLAG_IS_OUT, &desc->flags))
455 	struct gpio_desc *desc;
463 	desc = gpio_to_desc(gpio);
465 	if (!desc) {
470 	CLASS(gpio_chip_guard, guard)(desc);
474 	offset = gpio_chip_hwgpio(desc);
485 	status = gpiod_request_user(desc, "sysfs");
489 	status = gpiod_set_transitory(desc, false);
491 		gpiod_free(desc);
495 	status = gpiod_export(desc, true);
497 		gpiod_free(desc);
499 		set_bit(FLAG_SYSFS, &desc->flags);
512 	struct gpio_desc *desc;
520 	desc = gpio_to_desc(gpio);
522 	if (!desc) {
533 	if (test_and_clear_bit(FLAG_SYSFS, &desc->flags)) {
534 		gpiod_unexport(desc);
535 		gpiod_free(desc);
560  * @desc: GPIO to make available, already requested
573 int gpiod_export(struct gpio_desc *desc, bool direction_may_change)
587 	if (!desc) {
592 	CLASS(gpio_chip_guard, guard)(desc);
596 	if (test_and_set_bit(FLAG_EXPORT, &desc->flags))
599 	gdev = desc->gdev;
609 	if (!test_bit(FLAG_REQUESTED, &desc->flags)) {
610 		gpiod_dbg(desc, "%s: unavailable (not requested)\n", __func__);
621 	data->desc = desc;
628 	offset = gpio_chip_hwgpio(desc);
635 					desc_to_gpio(desc));
648 	clear_bit(FLAG_EXPORT, &desc->flags);
649 	gpiod_dbg(desc, "%s: status %d\n", __func__, status);
654 static int match_export(struct device *dev, const void *desc)
658 	return data->desc == desc;
665  * @desc: GPIO to create symlink to, already exported
673 		      struct gpio_desc *desc)
678 	if (!desc) {
683 	cdev = class_find_device(&gpio_class, NULL, desc, match_export);
696  * @desc: GPIO to make unavailable
700 void gpiod_unexport(struct gpio_desc *desc)
705 	if (!desc) {
712 	if (!test_bit(FLAG_EXPORT, &desc->flags))
715 	dev = class_find_device(&gpio_class, NULL, desc, match_export);
721 	clear_bit(FLAG_EXPORT, &desc->flags);
789 	struct gpio_desc *desc;
809 	for_each_gpio_desc_with_flag(chip, desc, FLAG_SYSFS) {
810 		gpiod_unexport(desc);
811 		gpiod_free(desc);