79 			return &chip->desc[gpio - chip->base];  in gpio_to_desc()
101 	return &chip->desc[hwnum];  in gpiochip_get_desc()
109 int desc_to_gpio(const struct gpio_desc *desc)  in desc_to_gpio()  argument
111 	return desc->chip->base + (desc - &desc->chip->desc[0]);  in desc_to_gpio()
120 struct gpio_chip *gpiod_to_chip(const struct gpio_desc *desc)  in gpiod_to_chip()  argument
122 	return desc ? desc->chip : NULL;  in gpiod_to_chip()
158 int gpiod_get_direction(struct gpio_desc *desc)  in gpiod_get_direction()  argument
164 	chip = gpiod_to_chip(desc);  in gpiod_get_direction()
165 	offset = gpio_chip_hwgpio(desc);  in gpiod_get_direction()
174 		clear_bit(FLAG_IS_OUT, &desc->flags);  in gpiod_get_direction()
178 		set_bit(FLAG_IS_OUT, &desc->flags);  in gpiod_get_direction()
269 		struct gpio_desc *desc = &descs[id];  in gpiochip_add()  local
271 		desc->chip = chip;  in gpiochip_add()
279 		desc->flags = !chip->direction_input ? (1 << FLAG_IS_OUT) : 0;  in gpiochip_add()
282 	chip->desc = descs;  in gpiochip_add()
310 	chip->desc = NULL;  in gpiochip_add()
344 		if (test_bit(FLAG_REQUESTED, &chip->desc[id].flags))  in gpiochip_remove()
348 		chip->desc[id].chip = NULL;  in gpiochip_remove()
353 	kfree(chip->desc);  in gpiochip_remove()
354 	chip->desc = NULL;  in gpiochip_remove()
778 static int __gpiod_request(struct gpio_desc *desc, const char *label)  in __gpiod_request()  argument
780 	struct gpio_chip	*chip = desc->chip;  in __gpiod_request()
790 	if (test_and_set_bit(FLAG_REQUESTED, &desc->flags) == 0) {  in __gpiod_request()
791 		desc_set_label(desc, label ? : "?");  in __gpiod_request()
801 		status = chip->request(chip, gpio_chip_hwgpio(desc));  in __gpiod_request()
805 			desc_set_label(desc, NULL);  in __gpiod_request()
806 			clear_bit(FLAG_REQUESTED, &desc->flags);  in __gpiod_request()
813 		gpiod_get_direction(desc);  in __gpiod_request()
821 int gpiod_request(struct gpio_desc *desc, const char *label)  in gpiod_request()  argument
826 	if (!desc) {  in gpiod_request()
831 	chip = desc->chip;  in gpiod_request()
836 		status = __gpiod_request(desc, label);  in gpiod_request()
843 		gpiod_dbg(desc, "%s: status %d\n", __func__, status);  in gpiod_request()
848 static bool __gpiod_free(struct gpio_desc *desc)  in __gpiod_free()  argument
856 	gpiod_unexport(desc);  in __gpiod_free()
860 	chip = desc->chip;  in __gpiod_free()
861 	if (chip && test_bit(FLAG_REQUESTED, &desc->flags)) {  in __gpiod_free()
865 			chip->free(chip, gpio_chip_hwgpio(desc));  in __gpiod_free()
868 		desc_set_label(desc, NULL);  in __gpiod_free()
869 		clear_bit(FLAG_ACTIVE_LOW, &desc->flags);  in __gpiod_free()
870 		clear_bit(FLAG_REQUESTED, &desc->flags);  in __gpiod_free()
871 		clear_bit(FLAG_OPEN_DRAIN, &desc->flags);  in __gpiod_free()
872 		clear_bit(FLAG_OPEN_SOURCE, &desc->flags);  in __gpiod_free()
873 		clear_bit(FLAG_IS_HOGGED, &desc->flags);  in __gpiod_free()
881 void gpiod_free(struct gpio_desc *desc)  in gpiod_free()  argument
883 	if (desc && __gpiod_free(desc))  in gpiod_free()
884 		module_put(desc->chip->owner);  in gpiod_free()
904 	struct gpio_desc *desc;  in gpiochip_is_requested()  local
909 	desc = &chip->desc[offset];  in gpiochip_is_requested()
911 	if (test_bit(FLAG_REQUESTED, &desc->flags) == 0)  in gpiochip_is_requested()
913 	return desc->label;  in gpiochip_is_requested()
931 	struct gpio_desc *desc = gpiochip_get_desc(chip, hwnum);  in gpiochip_request_own_desc()  local
934 	if (IS_ERR(desc)) {  in gpiochip_request_own_desc()
936 		return desc;  in gpiochip_request_own_desc()
939 	err = __gpiod_request(desc, label);  in gpiochip_request_own_desc()
943 	return desc;  in gpiochip_request_own_desc()
954 void gpiochip_free_own_desc(struct gpio_desc *desc)  in gpiochip_free_own_desc()  argument
956 	if (desc)  in gpiochip_free_own_desc()
957 		__gpiod_free(desc);  in gpiochip_free_own_desc()
979 int gpiod_direction_input(struct gpio_desc *desc)  in gpiod_direction_input()  argument
984 	if (!desc || !desc->chip) {  in gpiod_direction_input()
989 	chip = desc->chip;  in gpiod_direction_input()
991 		gpiod_warn(desc,  in gpiod_direction_input()
997 	status = chip->direction_input(chip, gpio_chip_hwgpio(desc));  in gpiod_direction_input()
999 		clear_bit(FLAG_IS_OUT, &desc->flags);  in gpiod_direction_input()
1001 	trace_gpio_direction(desc_to_gpio(desc), 1, status);  in gpiod_direction_input()
1007 static int _gpiod_direction_output_raw(struct gpio_desc *desc, int value)  in _gpiod_direction_output_raw()  argument
1013 	if (test_bit(FLAG_USED_AS_IRQ, &desc->flags)) {  in _gpiod_direction_output_raw()
1014 		gpiod_err(desc,  in _gpiod_direction_output_raw()
1021 	if (value && test_bit(FLAG_OPEN_DRAIN,  &desc->flags))  in _gpiod_direction_output_raw()
1022 		return gpiod_direction_input(desc);  in _gpiod_direction_output_raw()
1025 	if (!value && test_bit(FLAG_OPEN_SOURCE,  &desc->flags))  in _gpiod_direction_output_raw()
1026 		return gpiod_direction_input(desc);  in _gpiod_direction_output_raw()
1028 	chip = desc->chip;  in _gpiod_direction_output_raw()
1030 		gpiod_warn(desc,  in _gpiod_direction_output_raw()
1036 	status = chip->direction_output(chip, gpio_chip_hwgpio(desc), value);  in _gpiod_direction_output_raw()
1038 		set_bit(FLAG_IS_OUT, &desc->flags);  in _gpiod_direction_output_raw()
1039 	trace_gpio_value(desc_to_gpio(desc), 0, value);  in _gpiod_direction_output_raw()
1040 	trace_gpio_direction(desc_to_gpio(desc), 0, status);  in _gpiod_direction_output_raw()
1055 int gpiod_direction_output_raw(struct gpio_desc *desc, int value)  in gpiod_direction_output_raw()  argument
1057 	if (!desc || !desc->chip) {  in gpiod_direction_output_raw()
1061 	return _gpiod_direction_output_raw(desc, value);  in gpiod_direction_output_raw()
1077 int gpiod_direction_output(struct gpio_desc *desc, int value)  in gpiod_direction_output()  argument
1079 	if (!desc || !desc->chip) {  in gpiod_direction_output()
1083 	if (test_bit(FLAG_ACTIVE_LOW, &desc->flags))  in gpiod_direction_output()
1085 	return _gpiod_direction_output_raw(desc, value);  in gpiod_direction_output()
1097 int gpiod_set_debounce(struct gpio_desc *desc, unsigned debounce)  in gpiod_set_debounce()  argument
1101 	if (!desc || !desc->chip) {  in gpiod_set_debounce()
1106 	chip = desc->chip;  in gpiod_set_debounce()
1108 		gpiod_dbg(desc,  in gpiod_set_debounce()
1114 	return chip->set_debounce(chip, gpio_chip_hwgpio(desc), debounce);  in gpiod_set_debounce()
1124 int gpiod_is_active_low(const struct gpio_desc *desc)  in gpiod_is_active_low()  argument
1126 	return test_bit(FLAG_ACTIVE_LOW, &desc->flags);  in gpiod_is_active_low()
1152 static bool _gpiod_get_raw_value(const struct gpio_desc *desc)  in _gpiod_get_raw_value()  argument
1158 	chip = desc->chip;  in _gpiod_get_raw_value()
1159 	offset = gpio_chip_hwgpio(desc);  in _gpiod_get_raw_value()
1161 	trace_gpio_value(desc_to_gpio(desc), 1, value);  in _gpiod_get_raw_value()
1175 int gpiod_get_raw_value(const struct gpio_desc *desc)  in gpiod_get_raw_value()  argument
1177 	if (!desc)  in gpiod_get_raw_value()
1180 	WARN_ON(desc->chip->can_sleep);  in gpiod_get_raw_value()
1181 	return _gpiod_get_raw_value(desc);  in gpiod_get_raw_value()
1195 int gpiod_get_value(const struct gpio_desc *desc)  in gpiod_get_value()  argument
1198 	if (!desc)  in gpiod_get_value()
1201 	WARN_ON(desc->chip->can_sleep);  in gpiod_get_value()
1203 	value = _gpiod_get_raw_value(desc);  in gpiod_get_value()
1204 	if (test_bit(FLAG_ACTIVE_LOW, &desc->flags))  in gpiod_get_value()
1216 static void _gpio_set_open_drain_value(struct gpio_desc *desc, bool value)  in _gpio_set_open_drain_value()  argument
1219 	struct gpio_chip *chip = desc->chip;  in _gpio_set_open_drain_value()
1220 	int offset = gpio_chip_hwgpio(desc);  in _gpio_set_open_drain_value()
1225 			clear_bit(FLAG_IS_OUT, &desc->flags);  in _gpio_set_open_drain_value()
1229 			set_bit(FLAG_IS_OUT, &desc->flags);  in _gpio_set_open_drain_value()
1231 	trace_gpio_direction(desc_to_gpio(desc), value, err);  in _gpio_set_open_drain_value()
1233 		gpiod_err(desc,  in _gpio_set_open_drain_value()
1243 static void _gpio_set_open_source_value(struct gpio_desc *desc, bool value)  in _gpio_set_open_source_value()  argument
1246 	struct gpio_chip *chip = desc->chip;  in _gpio_set_open_source_value()
1247 	int offset = gpio_chip_hwgpio(desc);  in _gpio_set_open_source_value()
1252 			set_bit(FLAG_IS_OUT, &desc->flags);  in _gpio_set_open_source_value()
1256 			clear_bit(FLAG_IS_OUT, &desc->flags);  in _gpio_set_open_source_value()
1258 	trace_gpio_direction(desc_to_gpio(desc), !value, err);  in _gpio_set_open_source_value()
1260 		gpiod_err(desc,  in _gpio_set_open_source_value()
1265 static void _gpiod_set_raw_value(struct gpio_desc *desc, bool value)  in _gpiod_set_raw_value()  argument
1269 	chip = desc->chip;  in _gpiod_set_raw_value()
1270 	trace_gpio_value(desc_to_gpio(desc), 0, value);  in _gpiod_set_raw_value()
1271 	if (test_bit(FLAG_OPEN_DRAIN, &desc->flags))  in _gpiod_set_raw_value()
1272 		_gpio_set_open_drain_value(desc, value);  in _gpiod_set_raw_value()
1273 	else if (test_bit(FLAG_OPEN_SOURCE, &desc->flags))  in _gpiod_set_raw_value()
1274 		_gpio_set_open_source_value(desc, value);  in _gpiod_set_raw_value()
1276 		chip->set(chip, gpio_chip_hwgpio(desc), value);  in _gpiod_set_raw_value()
1328 			struct gpio_desc *desc = desc_array[i];  in gpiod_set_array_priv()  local
1329 			int hwgpio = gpio_chip_hwgpio(desc);  in gpiod_set_array_priv()
1332 			if (!raw && test_bit(FLAG_ACTIVE_LOW, &desc->flags))  in gpiod_set_array_priv()
1334 			trace_gpio_value(desc_to_gpio(desc), 0, value);  in gpiod_set_array_priv()
1339 			if (test_bit(FLAG_OPEN_DRAIN, &desc->flags)) {  in gpiod_set_array_priv()
1340 				_gpio_set_open_drain_value(desc,value);  in gpiod_set_array_priv()
1341 			} else if (test_bit(FLAG_OPEN_SOURCE, &desc->flags)) {  in gpiod_set_array_priv()
1342 				_gpio_set_open_source_value(desc, value);  in gpiod_set_array_priv()
1372 void gpiod_set_raw_value(struct gpio_desc *desc, int value)  in gpiod_set_raw_value()  argument
1374 	if (!desc)  in gpiod_set_raw_value()
1377 	WARN_ON(desc->chip->can_sleep);  in gpiod_set_raw_value()
1378 	_gpiod_set_raw_value(desc, value);  in gpiod_set_raw_value()
1393 void gpiod_set_value(struct gpio_desc *desc, int value)  in gpiod_set_value()  argument
1395 	if (!desc)  in gpiod_set_value()
1398 	WARN_ON(desc->chip->can_sleep);  in gpiod_set_value()
1399 	if (test_bit(FLAG_ACTIVE_LOW, &desc->flags))  in gpiod_set_value()
1401 	_gpiod_set_raw_value(desc, value);  in gpiod_set_value()
1452 int gpiod_cansleep(const struct gpio_desc *desc)  in gpiod_cansleep()  argument
1454 	if (!desc)  in gpiod_cansleep()
1456 	return desc->chip->can_sleep;  in gpiod_cansleep()
1467 int gpiod_to_irq(const struct gpio_desc *desc)  in gpiod_to_irq()  argument
1472 	if (!desc)  in gpiod_to_irq()
1474 	chip = desc->chip;  in gpiod_to_irq()
1475 	offset = gpio_chip_hwgpio(desc);  in gpiod_to_irq()
1493 	if (test_bit(FLAG_IS_OUT, &chip->desc[offset].flags)) {  in gpiochip_lock_as_irq()
1500 	set_bit(FLAG_USED_AS_IRQ, &chip->desc[offset].flags);  in gpiochip_lock_as_irq()
1518 	clear_bit(FLAG_USED_AS_IRQ, &chip->desc[offset].flags);  in gpiochip_unlock_as_irq()
1531 int gpiod_get_raw_value_cansleep(const struct gpio_desc *desc)  in gpiod_get_raw_value_cansleep()  argument
1534 	if (!desc)  in gpiod_get_raw_value_cansleep()
1536 	return _gpiod_get_raw_value(desc);  in gpiod_get_raw_value_cansleep()
1549 int gpiod_get_value_cansleep(const struct gpio_desc *desc)  in gpiod_get_value_cansleep()  argument
1554 	if (!desc)  in gpiod_get_value_cansleep()
1557 	value = _gpiod_get_raw_value(desc);  in gpiod_get_value_cansleep()
1558 	if (test_bit(FLAG_ACTIVE_LOW, &desc->flags))  in gpiod_get_value_cansleep()
1575 void gpiod_set_raw_value_cansleep(struct gpio_desc *desc, int value)  in gpiod_set_raw_value_cansleep()  argument
1578 	if (!desc)  in gpiod_set_raw_value_cansleep()
1580 	_gpiod_set_raw_value(desc, value);  in gpiod_set_raw_value_cansleep()
1594 void gpiod_set_value_cansleep(struct gpio_desc *desc, int value)  in gpiod_set_value_cansleep()  argument
1597 	if (!desc)  in gpiod_set_value_cansleep()
1600 	if (test_bit(FLAG_ACTIVE_LOW, &desc->flags))  in gpiod_set_value_cansleep()
1602 	_gpiod_set_raw_value(desc, value);  in gpiod_set_value_cansleep()
1669 	struct gpio_desc *desc;  in of_find_gpio()  local
1680 		desc = of_get_named_gpiod_flags(dev->of_node, prop_name, idx,  in of_find_gpio()
1682 		if (!IS_ERR(desc) || (PTR_ERR(desc) == -EPROBE_DEFER))  in of_find_gpio()
1686 	if (IS_ERR(desc))  in of_find_gpio()
1687 		return desc;  in of_find_gpio()
1692 	return desc;  in of_find_gpio()
1701 	struct gpio_desc *desc;  in acpi_find_gpio()  local
1715 		desc = acpi_get_gpiod_by_index(adev, propname, idx, &info);  in acpi_find_gpio()
1716 		if (!IS_ERR(desc) || (PTR_ERR(desc) == -EPROBE_DEFER))  in acpi_find_gpio()
1721 	if (IS_ERR(desc)) {  in acpi_find_gpio()
1722 		desc = acpi_get_gpiod_by_index(adev, NULL, idx, &info);  in acpi_find_gpio()
1723 		if (IS_ERR(desc))  in acpi_find_gpio()
1724 			return desc;  in acpi_find_gpio()
1730 	return desc;  in acpi_find_gpio()
1768 	struct gpio_desc *desc = ERR_PTR(-ENOENT);  in gpiod_find()  local
1774 		return desc;  in gpiod_find()
1802 		desc = gpiochip_get_desc(chip, p->chip_hwnum);  in gpiod_find()
1805 		return desc;  in gpiod_find()
1808 	return desc;  in gpiod_find()
1923 static int gpiod_configure_flags(struct gpio_desc *desc, const char *con_id,  in gpiod_configure_flags()  argument
1929 		set_bit(FLAG_ACTIVE_LOW, &desc->flags);  in gpiod_configure_flags()
1931 		set_bit(FLAG_OPEN_DRAIN, &desc->flags);  in gpiod_configure_flags()
1933 		set_bit(FLAG_OPEN_SOURCE, &desc->flags);  in gpiod_configure_flags()
1943 		status = gpiod_direction_output(desc,  in gpiod_configure_flags()
1946 		status = gpiod_direction_input(desc);  in gpiod_configure_flags()
1970 	struct gpio_desc *desc = NULL;  in __gpiod_get_index()  local
1980 			desc = of_find_gpio(dev, con_id, idx, &lookupflags);  in __gpiod_get_index()
1983 			desc = acpi_find_gpio(dev, con_id, idx, &lookupflags);  in __gpiod_get_index()
1991 	if (!desc || desc == ERR_PTR(-ENOENT)) {  in __gpiod_get_index()
1993 		desc = gpiod_find(dev, con_id, idx, &lookupflags);  in __gpiod_get_index()
1996 	if (IS_ERR(desc)) {  in __gpiod_get_index()
1998 		return desc;  in __gpiod_get_index()
2001 	status = gpiod_request(desc, con_id);  in __gpiod_get_index()
2005 	status = gpiod_configure_flags(desc, con_id, lookupflags, flags);  in __gpiod_get_index()
2008 		gpiod_put(desc);  in __gpiod_get_index()
2012 	return desc;  in __gpiod_get_index()
2033 	struct gpio_desc *desc = ERR_PTR(-ENODEV);  in fwnode_get_named_gpiod()  local
2043 		desc = of_get_named_gpiod_flags(of_node(fwnode), propname, 0,  in fwnode_get_named_gpiod()
2045 		if (!IS_ERR(desc))  in fwnode_get_named_gpiod()
2050 		desc = acpi_get_gpiod_by_index(acpi_node(fwnode), propname, 0,  in fwnode_get_named_gpiod()
2052 		if (!IS_ERR(desc))  in fwnode_get_named_gpiod()
2056 	if (IS_ERR(desc))  in fwnode_get_named_gpiod()
2057 		return desc;  in fwnode_get_named_gpiod()
2059 	ret = gpiod_request(desc, NULL);  in fwnode_get_named_gpiod()
2065 		set_bit(FLAG_ACTIVE_LOW, &desc->flags);  in fwnode_get_named_gpiod()
2067 	return desc;  in fwnode_get_named_gpiod()
2088 	struct gpio_desc *desc;  in __gpiod_get_index_optional()  local
2090 	desc = gpiod_get_index(dev, con_id, index, flags);  in __gpiod_get_index_optional()
2091 	if (IS_ERR(desc)) {  in __gpiod_get_index_optional()
2092 		if (PTR_ERR(desc) == -ENOENT)  in __gpiod_get_index_optional()
2096 	return desc;  in __gpiod_get_index_optional()
2108 int gpiod_hog(struct gpio_desc *desc, const char *name,  in gpiod_hog()  argument
2116 	chip = gpiod_to_chip(desc);  in gpiod_hog()
2117 	hwnum = gpio_chip_hwgpio(desc);  in gpiod_hog()
2125 	status = gpiod_configure_flags(desc, name, lflags, dflags);  in gpiod_hog()
2128 		gpiochip_free_own_desc(desc);  in gpiod_hog()
2133 	set_bit(FLAG_IS_HOGGED, &desc->flags);  in gpiod_hog()
2136 		desc_to_gpio(desc), name,  in gpiod_hog()
2155 		if (test_bit(FLAG_IS_HOGGED, &chip->desc[id].flags))  in gpiochip_free_hogs()
2156 			gpiochip_free_own_desc(&chip->desc[id]);  in gpiochip_free_hogs()
2176 	struct gpio_desc *desc;  in gpiod_get_array()  local
2184 	descs = kzalloc(sizeof(*descs) + sizeof(descs->desc[0]) * count,  in gpiod_get_array()
2190 		desc = gpiod_get_index(dev, con_id, descs->ndescs, flags);  in gpiod_get_array()
2191 		if (IS_ERR(desc)) {  in gpiod_get_array()
2193 			return ERR_CAST(desc);  in gpiod_get_array()
2195 		descs->desc[descs->ndescs] = desc;  in gpiod_get_array()
2232 void gpiod_put(struct gpio_desc *desc)  in gpiod_put()  argument
2234 	gpiod_free(desc);  in gpiod_put()
2247 		gpiod_put(descs->desc[i]);  in gpiod_put_array()
2259 	struct gpio_desc	*gdesc = &chip->desc[0];  in gpiolib_dbg_show()