78 			return &chip->desc[gpio - chip->base];  in gpio_to_desc()
100 	return &chip->desc[hwnum];  in gpiochip_get_desc()
108 int desc_to_gpio(const struct gpio_desc *desc)  in desc_to_gpio()  argument
110 	return desc->chip->base + (desc - &desc->chip->desc[0]);  in desc_to_gpio()
119 struct gpio_chip *gpiod_to_chip(const struct gpio_desc *desc)  in gpiod_to_chip()  argument
121 	return desc ? desc->chip : NULL;  in gpiod_to_chip()
157 int gpiod_get_direction(struct gpio_desc *desc)  in gpiod_get_direction()  argument
163 	chip = gpiod_to_chip(desc);  in gpiod_get_direction()
164 	offset = gpio_chip_hwgpio(desc);  in gpiod_get_direction()
173 		clear_bit(FLAG_IS_OUT, &desc->flags);  in gpiod_get_direction()
177 		set_bit(FLAG_IS_OUT, &desc->flags);  in gpiod_get_direction()
234 			struct gpio_desc *gpio = &chip->desc[i];  in gpio_name_to_desc()
277 		gc->desc[i].name = gc->names[i];  in gpiochip_set_desc_names()
330 		struct gpio_desc *desc = &descs[id];  in gpiochip_add()  local
332 		desc->chip = chip;  in gpiochip_add()
340 		desc->flags = !chip->direction_input ? (1 << FLAG_IS_OUT) : 0;  in gpiochip_add()
343 	chip->desc = descs;  in gpiochip_add()
382 	chip->desc = NULL;  in gpiochip_add()
402 	struct gpio_desc *desc;  in gpiochip_remove()  local
418 		desc = &chip->desc[id];  in gpiochip_remove()
419 		desc->chip = NULL;  in gpiochip_remove()
420 		if (test_bit(FLAG_REQUESTED, &desc->flags))  in gpiochip_remove()
429 	kfree(chip->desc);  in gpiochip_remove()
430 	chip->desc = NULL;  in gpiochip_remove()
891 static int __gpiod_request(struct gpio_desc *desc, const char *label)  in __gpiod_request()  argument
893 	struct gpio_chip	*chip = desc->chip;  in __gpiod_request()
903 	if (test_and_set_bit(FLAG_REQUESTED, &desc->flags) == 0) {  in __gpiod_request()
904 		desc_set_label(desc, label ? : "?");  in __gpiod_request()
914 		status = chip->request(chip, gpio_chip_hwgpio(desc));  in __gpiod_request()
918 			desc_set_label(desc, NULL);  in __gpiod_request()
919 			clear_bit(FLAG_REQUESTED, &desc->flags);  in __gpiod_request()
926 		gpiod_get_direction(desc);  in __gpiod_request()
934 		clear_bit(FLAG_ACTIVE_LOW, &desc->flags);  in __gpiod_request()
935 		clear_bit(FLAG_OPEN_DRAIN, &desc->flags);  in __gpiod_request()
936 		clear_bit(FLAG_OPEN_SOURCE, &desc->flags);  in __gpiod_request()
942 int gpiod_request(struct gpio_desc *desc, const char *label)  in gpiod_request()  argument
947 	if (!desc) {  in gpiod_request()
952 	chip = desc->chip;  in gpiod_request()
957 		status = __gpiod_request(desc, label);  in gpiod_request()
964 		gpiod_dbg(desc, "%s: status %d\n", __func__, status);  in gpiod_request()
969 static bool __gpiod_free(struct gpio_desc *desc)  in __gpiod_free()  argument
977 	gpiod_unexport(desc);  in __gpiod_free()
981 	chip = desc->chip;  in __gpiod_free()
982 	if (chip && test_bit(FLAG_REQUESTED, &desc->flags)) {  in __gpiod_free()
986 			chip->free(chip, gpio_chip_hwgpio(desc));  in __gpiod_free()
989 		desc_set_label(desc, NULL);  in __gpiod_free()
990 		clear_bit(FLAG_ACTIVE_LOW, &desc->flags);  in __gpiod_free()
991 		clear_bit(FLAG_REQUESTED, &desc->flags);  in __gpiod_free()
992 		clear_bit(FLAG_OPEN_DRAIN, &desc->flags);  in __gpiod_free()
993 		clear_bit(FLAG_OPEN_SOURCE, &desc->flags);  in __gpiod_free()
994 		clear_bit(FLAG_IS_HOGGED, &desc->flags);  in __gpiod_free()
1002 void gpiod_free(struct gpio_desc *desc)  in gpiod_free()  argument
1004 	if (desc && __gpiod_free(desc))  in gpiod_free()
1005 		module_put(desc->chip->owner);  in gpiod_free()
1025 	struct gpio_desc *desc;  in gpiochip_is_requested()  local
1030 	desc = &chip->desc[offset];  in gpiochip_is_requested()
1032 	if (test_bit(FLAG_REQUESTED, &desc->flags) == 0)  in gpiochip_is_requested()
1034 	return desc->label;  in gpiochip_is_requested()
1052 	struct gpio_desc *desc = gpiochip_get_desc(chip, hwnum);  in gpiochip_request_own_desc()  local
1055 	if (IS_ERR(desc)) {  in gpiochip_request_own_desc()
1057 		return desc;  in gpiochip_request_own_desc()
1060 	err = __gpiod_request(desc, label);  in gpiochip_request_own_desc()
1064 	return desc;  in gpiochip_request_own_desc()
1075 void gpiochip_free_own_desc(struct gpio_desc *desc)  in gpiochip_free_own_desc()  argument
1077 	if (desc)  in gpiochip_free_own_desc()
1078 		__gpiod_free(desc);  in gpiochip_free_own_desc()
1100 int gpiod_direction_input(struct gpio_desc *desc)  in gpiod_direction_input()  argument
1105 	if (!desc || !desc->chip) {  in gpiod_direction_input()
1110 	chip = desc->chip;  in gpiod_direction_input()
1112 		gpiod_warn(desc,  in gpiod_direction_input()
1118 	status = chip->direction_input(chip, gpio_chip_hwgpio(desc));  in gpiod_direction_input()
1120 		clear_bit(FLAG_IS_OUT, &desc->flags);  in gpiod_direction_input()
1122 	trace_gpio_direction(desc_to_gpio(desc), 1, status);  in gpiod_direction_input()
1128 static int _gpiod_direction_output_raw(struct gpio_desc *desc, int value)  in _gpiod_direction_output_raw()  argument
1134 	if (test_bit(FLAG_USED_AS_IRQ, &desc->flags)) {  in _gpiod_direction_output_raw()
1135 		gpiod_err(desc,  in _gpiod_direction_output_raw()
1142 	if (value && test_bit(FLAG_OPEN_DRAIN,  &desc->flags))  in _gpiod_direction_output_raw()
1143 		return gpiod_direction_input(desc);  in _gpiod_direction_output_raw()
1146 	if (!value && test_bit(FLAG_OPEN_SOURCE,  &desc->flags))  in _gpiod_direction_output_raw()
1147 		return gpiod_direction_input(desc);  in _gpiod_direction_output_raw()
1149 	chip = desc->chip;  in _gpiod_direction_output_raw()
1151 		gpiod_warn(desc,  in _gpiod_direction_output_raw()
1157 	status = chip->direction_output(chip, gpio_chip_hwgpio(desc), value);  in _gpiod_direction_output_raw()
1159 		set_bit(FLAG_IS_OUT, &desc->flags);  in _gpiod_direction_output_raw()
1160 	trace_gpio_value(desc_to_gpio(desc), 0, value);  in _gpiod_direction_output_raw()
1161 	trace_gpio_direction(desc_to_gpio(desc), 0, status);  in _gpiod_direction_output_raw()
1176 int gpiod_direction_output_raw(struct gpio_desc *desc, int value)  in gpiod_direction_output_raw()  argument
1178 	if (!desc || !desc->chip) {  in gpiod_direction_output_raw()
1182 	return _gpiod_direction_output_raw(desc, value);  in gpiod_direction_output_raw()
1198 int gpiod_direction_output(struct gpio_desc *desc, int value)  in gpiod_direction_output()  argument
1200 	if (!desc || !desc->chip) {  in gpiod_direction_output()
1204 	if (test_bit(FLAG_ACTIVE_LOW, &desc->flags))  in gpiod_direction_output()
1206 	return _gpiod_direction_output_raw(desc, value);  in gpiod_direction_output()
1218 int gpiod_set_debounce(struct gpio_desc *desc, unsigned debounce)  in gpiod_set_debounce()  argument
1222 	if (!desc || !desc->chip) {  in gpiod_set_debounce()
1227 	chip = desc->chip;  in gpiod_set_debounce()
1229 		gpiod_dbg(desc,  in gpiod_set_debounce()
1235 	return chip->set_debounce(chip, gpio_chip_hwgpio(desc), debounce);  in gpiod_set_debounce()
1245 int gpiod_is_active_low(const struct gpio_desc *desc)  in gpiod_is_active_low()  argument
1247 	return test_bit(FLAG_ACTIVE_LOW, &desc->flags);  in gpiod_is_active_low()
1273 static int _gpiod_get_raw_value(const struct gpio_desc *desc)  in _gpiod_get_raw_value()  argument
1279 	chip = desc->chip;  in _gpiod_get_raw_value()
1280 	offset = gpio_chip_hwgpio(desc);  in _gpiod_get_raw_value()
1289 	trace_gpio_value(desc_to_gpio(desc), 1, value);  in _gpiod_get_raw_value()
1303 int gpiod_get_raw_value(const struct gpio_desc *desc)  in gpiod_get_raw_value()  argument
1305 	if (!desc)  in gpiod_get_raw_value()
1308 	WARN_ON(desc->chip->can_sleep);  in gpiod_get_raw_value()
1309 	return _gpiod_get_raw_value(desc);  in gpiod_get_raw_value()
1323 int gpiod_get_value(const struct gpio_desc *desc)  in gpiod_get_value()  argument
1326 	if (!desc)  in gpiod_get_value()
1329 	WARN_ON(desc->chip->can_sleep);  in gpiod_get_value()
1331 	value = _gpiod_get_raw_value(desc);  in gpiod_get_value()
1335 	if (test_bit(FLAG_ACTIVE_LOW, &desc->flags))  in gpiod_get_value()
1347 static void _gpio_set_open_drain_value(struct gpio_desc *desc, bool value)  in _gpio_set_open_drain_value()  argument
1350 	struct gpio_chip *chip = desc->chip;  in _gpio_set_open_drain_value()
1351 	int offset = gpio_chip_hwgpio(desc);  in _gpio_set_open_drain_value()
1356 			clear_bit(FLAG_IS_OUT, &desc->flags);  in _gpio_set_open_drain_value()
1360 			set_bit(FLAG_IS_OUT, &desc->flags);  in _gpio_set_open_drain_value()
1362 	trace_gpio_direction(desc_to_gpio(desc), value, err);  in _gpio_set_open_drain_value()
1364 		gpiod_err(desc,  in _gpio_set_open_drain_value()
1374 static void _gpio_set_open_source_value(struct gpio_desc *desc, bool value)  in _gpio_set_open_source_value()  argument
1377 	struct gpio_chip *chip = desc->chip;  in _gpio_set_open_source_value()
1378 	int offset = gpio_chip_hwgpio(desc);  in _gpio_set_open_source_value()
1383 			set_bit(FLAG_IS_OUT, &desc->flags);  in _gpio_set_open_source_value()
1387 			clear_bit(FLAG_IS_OUT, &desc->flags);  in _gpio_set_open_source_value()
1389 	trace_gpio_direction(desc_to_gpio(desc), !value, err);  in _gpio_set_open_source_value()
1391 		gpiod_err(desc,  in _gpio_set_open_source_value()
1396 static void _gpiod_set_raw_value(struct gpio_desc *desc, bool value)  in _gpiod_set_raw_value()  argument
1400 	chip = desc->chip;  in _gpiod_set_raw_value()
1401 	trace_gpio_value(desc_to_gpio(desc), 0, value);  in _gpiod_set_raw_value()
1402 	if (test_bit(FLAG_OPEN_DRAIN, &desc->flags))  in _gpiod_set_raw_value()
1403 		_gpio_set_open_drain_value(desc, value);  in _gpiod_set_raw_value()
1404 	else if (test_bit(FLAG_OPEN_SOURCE, &desc->flags))  in _gpiod_set_raw_value()
1405 		_gpio_set_open_source_value(desc, value);  in _gpiod_set_raw_value()
1407 		chip->set(chip, gpio_chip_hwgpio(desc), value);  in _gpiod_set_raw_value()
1458 			struct gpio_desc *desc = desc_array[i];  in gpiod_set_array_value_priv()  local
1459 			int hwgpio = gpio_chip_hwgpio(desc);  in gpiod_set_array_value_priv()
1462 			if (!raw && test_bit(FLAG_ACTIVE_LOW, &desc->flags))  in gpiod_set_array_value_priv()
1464 			trace_gpio_value(desc_to_gpio(desc), 0, value);  in gpiod_set_array_value_priv()
1469 			if (test_bit(FLAG_OPEN_DRAIN, &desc->flags)) {  in gpiod_set_array_value_priv()
1470 				_gpio_set_open_drain_value(desc, value);  in gpiod_set_array_value_priv()
1471 			} else if (test_bit(FLAG_OPEN_SOURCE, &desc->flags)) {  in gpiod_set_array_value_priv()
1472 				_gpio_set_open_source_value(desc, value);  in gpiod_set_array_value_priv()
1500 void gpiod_set_raw_value(struct gpio_desc *desc, int value)  in gpiod_set_raw_value()  argument
1502 	if (!desc)  in gpiod_set_raw_value()
1505 	WARN_ON(desc->chip->can_sleep);  in gpiod_set_raw_value()
1506 	_gpiod_set_raw_value(desc, value);  in gpiod_set_raw_value()
1521 void gpiod_set_value(struct gpio_desc *desc, int value)  in gpiod_set_value()  argument
1523 	if (!desc)  in gpiod_set_value()
1526 	WARN_ON(desc->chip->can_sleep);  in gpiod_set_value()
1527 	if (test_bit(FLAG_ACTIVE_LOW, &desc->flags))  in gpiod_set_value()
1529 	_gpiod_set_raw_value(desc, value);  in gpiod_set_value()
1582 int gpiod_cansleep(const struct gpio_desc *desc)  in gpiod_cansleep()  argument
1584 	if (!desc)  in gpiod_cansleep()
1586 	return desc->chip->can_sleep;  in gpiod_cansleep()
1597 int gpiod_to_irq(const struct gpio_desc *desc)  in gpiod_to_irq()  argument
1602 	if (!desc)  in gpiod_to_irq()
1604 	chip = desc->chip;  in gpiod_to_irq()
1605 	offset = gpio_chip_hwgpio(desc);  in gpiod_to_irq()
1623 	if (test_bit(FLAG_IS_OUT, &chip->desc[offset].flags)) {  in gpiochip_lock_as_irq()
1630 	set_bit(FLAG_USED_AS_IRQ, &chip->desc[offset].flags);  in gpiochip_lock_as_irq()
1648 	clear_bit(FLAG_USED_AS_IRQ, &chip->desc[offset].flags);  in gpiochip_unlock_as_irq()
1661 int gpiod_get_raw_value_cansleep(const struct gpio_desc *desc)  in gpiod_get_raw_value_cansleep()  argument
1664 	if (!desc)  in gpiod_get_raw_value_cansleep()
1666 	return _gpiod_get_raw_value(desc);  in gpiod_get_raw_value_cansleep()
1679 int gpiod_get_value_cansleep(const struct gpio_desc *desc)  in gpiod_get_value_cansleep()  argument
1684 	if (!desc)  in gpiod_get_value_cansleep()
1687 	value = _gpiod_get_raw_value(desc);  in gpiod_get_value_cansleep()
1691 	if (test_bit(FLAG_ACTIVE_LOW, &desc->flags))  in gpiod_get_value_cansleep()
1708 void gpiod_set_raw_value_cansleep(struct gpio_desc *desc, int value)  in gpiod_set_raw_value_cansleep()  argument
1711 	if (!desc)  in gpiod_set_raw_value_cansleep()
1713 	_gpiod_set_raw_value(desc, value);  in gpiod_set_raw_value_cansleep()
1727 void gpiod_set_value_cansleep(struct gpio_desc *desc, int value)  in gpiod_set_value_cansleep()  argument
1730 	if (!desc)  in gpiod_set_value_cansleep()
1733 	if (test_bit(FLAG_ACTIVE_LOW, &desc->flags))  in gpiod_set_value_cansleep()
1735 	_gpiod_set_raw_value(desc, value);  in gpiod_set_value_cansleep()
1817 	struct gpio_desc *desc;  in of_find_gpio()  local
1828 		desc = of_get_named_gpiod_flags(dev->of_node, prop_name, idx,  in of_find_gpio()
1830 		if (!IS_ERR(desc) || (PTR_ERR(desc) == -EPROBE_DEFER))  in of_find_gpio()
1834 	if (IS_ERR(desc))  in of_find_gpio()
1835 		return desc;  in of_find_gpio()
1847 	return desc;  in of_find_gpio()
1856 	struct gpio_desc *desc;  in acpi_find_gpio()  local
1870 		desc = acpi_get_gpiod_by_index(adev, propname, idx, &info);  in acpi_find_gpio()
1871 		if (!IS_ERR(desc) || (PTR_ERR(desc) == -EPROBE_DEFER))  in acpi_find_gpio()
1876 	if (IS_ERR(desc)) {  in acpi_find_gpio()
1877 		desc = acpi_get_gpiod_by_index(adev, NULL, idx, &info);  in acpi_find_gpio()
1878 		if (IS_ERR(desc))  in acpi_find_gpio()
1879 			return desc;  in acpi_find_gpio()
1885 	return desc;  in acpi_find_gpio()
1923 	struct gpio_desc *desc = ERR_PTR(-ENOENT);  in gpiod_find()  local
1929 		return desc;  in gpiod_find()
1957 		desc = gpiochip_get_desc(chip, p->chip_hwnum);  in gpiod_find()
1960 		return desc;  in gpiod_find()
1963 	return desc;  in gpiod_find()
2073 static void gpiod_parse_flags(struct gpio_desc *desc, unsigned long lflags)  in gpiod_parse_flags()  argument
2076 		set_bit(FLAG_ACTIVE_LOW, &desc->flags);  in gpiod_parse_flags()
2078 		set_bit(FLAG_OPEN_DRAIN, &desc->flags);  in gpiod_parse_flags()
2080 		set_bit(FLAG_OPEN_SOURCE, &desc->flags);  in gpiod_parse_flags()
2093 static int gpiod_configure_flags(struct gpio_desc *desc, const char *con_id,  in gpiod_configure_flags()  argument
2106 		status = gpiod_direction_output(desc,  in gpiod_configure_flags()
2109 		status = gpiod_direction_input(desc);  in gpiod_configure_flags()
2133 	struct gpio_desc *desc = NULL;  in gpiod_get_index()  local
2143 			desc = of_find_gpio(dev, con_id, idx, &lookupflags);  in gpiod_get_index()
2146 			desc = acpi_find_gpio(dev, con_id, idx, &lookupflags);  in gpiod_get_index()
2154 	if (!desc || desc == ERR_PTR(-ENOENT)) {  in gpiod_get_index()
2156 		desc = gpiod_find(dev, con_id, idx, &lookupflags);  in gpiod_get_index()
2159 	if (IS_ERR(desc)) {  in gpiod_get_index()
2161 		return desc;  in gpiod_get_index()
2164 	gpiod_parse_flags(desc, lookupflags);  in gpiod_get_index()
2166 	status = gpiod_request(desc, con_id);  in gpiod_get_index()
2170 	status = gpiod_configure_flags(desc, con_id, flags);  in gpiod_get_index()
2173 		gpiod_put(desc);  in gpiod_get_index()
2177 	return desc;  in gpiod_get_index()
2198 	struct gpio_desc *desc = ERR_PTR(-ENODEV);  in fwnode_get_named_gpiod()  local
2209 		desc = of_get_named_gpiod_flags(to_of_node(fwnode), propname, 0,  in fwnode_get_named_gpiod()
2211 		if (!IS_ERR(desc)) {  in fwnode_get_named_gpiod()
2218 		desc = acpi_node_get_gpiod(fwnode, propname, 0, &info);  in fwnode_get_named_gpiod()
2219 		if (!IS_ERR(desc))  in fwnode_get_named_gpiod()
2223 	if (IS_ERR(desc))  in fwnode_get_named_gpiod()
2224 		return desc;  in fwnode_get_named_gpiod()
2227 		set_bit(FLAG_ACTIVE_LOW, &desc->flags);  in fwnode_get_named_gpiod()
2231 			set_bit(FLAG_OPEN_DRAIN, &desc->flags);  in fwnode_get_named_gpiod()
2233 			set_bit(FLAG_OPEN_SOURCE, &desc->flags);  in fwnode_get_named_gpiod()
2236 	ret = gpiod_request(desc, NULL);  in fwnode_get_named_gpiod()
2240 	return desc;  in fwnode_get_named_gpiod()
2261 	struct gpio_desc *desc;  in gpiod_get_index_optional()  local
2263 	desc = gpiod_get_index(dev, con_id, index, flags);  in gpiod_get_index_optional()
2264 	if (IS_ERR(desc)) {  in gpiod_get_index_optional()
2265 		if (PTR_ERR(desc) == -ENOENT)  in gpiod_get_index_optional()
2269 	return desc;  in gpiod_get_index_optional()
2281 int gpiod_hog(struct gpio_desc *desc, const char *name,  in gpiod_hog()  argument
2289 	chip = gpiod_to_chip(desc);  in gpiod_hog()
2290 	hwnum = gpio_chip_hwgpio(desc);  in gpiod_hog()
2292 	gpiod_parse_flags(desc, lflags);  in gpiod_hog()
2301 	status = gpiod_configure_flags(desc, name, dflags);  in gpiod_hog()
2305 		gpiochip_free_own_desc(desc);  in gpiod_hog()
2310 	set_bit(FLAG_IS_HOGGED, &desc->flags);  in gpiod_hog()
2313 		desc_to_gpio(desc), name,  in gpiod_hog()
2332 		if (test_bit(FLAG_IS_HOGGED, &chip->desc[id].flags))  in gpiochip_free_hogs()
2333 			gpiochip_free_own_desc(&chip->desc[id]);  in gpiochip_free_hogs()
2353 	struct gpio_desc *desc;  in gpiod_get_array()  local
2361 	descs = kzalloc(sizeof(*descs) + sizeof(descs->desc[0]) * count,  in gpiod_get_array()
2367 		desc = gpiod_get_index(dev, con_id, descs->ndescs, flags);  in gpiod_get_array()
2368 		if (IS_ERR(desc)) {  in gpiod_get_array()
2370 			return ERR_CAST(desc);  in gpiod_get_array()
2372 		descs->desc[descs->ndescs] = desc;  in gpiod_get_array()
2409 void gpiod_put(struct gpio_desc *desc)  in gpiod_put()  argument
2411 	gpiod_free(desc);  in gpiod_put()
2424 		gpiod_put(descs->desc[i]);  in gpiod_put_array()
2436 	struct gpio_desc	*gdesc = &chip->desc[0];  in gpiolib_dbg_show()