forked from mirrors/linux
extcon: Remove the deprecated extcon functions
This patch removes the deprecated extcon functions using string type
to identify the type of external connector. The Commit 2a9de9c0f0
("extcon: Use the unique id for external connector instead of string)
uses the unique id to separate the type of external connector instead of
string name.
- extcon_register_interest()
- extcon_unregister_interest()
- extcon_set_cable_state()
- extcon_get_cable_state()
And, extcon_register_interest() finds the first extcon device to include the
requested external connector from extcon client device and then register the
notifier if extcon device argument is NULL. Instead, extcon_register_notifier()
supports this feature.
But, this patch remains the deprecatd function definition to prevent
the build break.
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
This commit is contained in:
Chanwoo Choi
parent
b396cff519
commit
830ae44220
2 changed files with 49 additions and 236 deletions
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@ -127,38 +127,6 @@ static int find_cable_index_by_id(struct extcon_dev *edev, const unsigned int id
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return -EINVAL;
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}
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static int find_cable_id_by_name(struct extcon_dev *edev, const char *name)
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{
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int id = -EINVAL;
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int i = 0;
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/* Find the id of extcon cable */
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while (extcon_name[i]) {
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if (!strncmp(extcon_name[i], name, CABLE_NAME_MAX)) {
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id = i;
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break;
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}
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i++;
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}
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return id;
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}
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static int find_cable_index_by_name(struct extcon_dev *edev, const char *name)
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{
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int id;
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if (edev->max_supported == 0)
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return -EINVAL;
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/* Find the the number of extcon cable */
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id = find_cable_id_by_name(edev, name);
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if (id < 0)
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return id;
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return find_cable_index_by_id(edev, id);
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}
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static bool is_extcon_changed(u32 prev, u32 new, int idx, bool *attached)
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{
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if (((prev >> idx) & 0x1) != ((new >> idx) & 0x1)) {
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@ -373,25 +341,6 @@ int extcon_get_cable_state_(struct extcon_dev *edev, const unsigned int id)
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}
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EXPORT_SYMBOL_GPL(extcon_get_cable_state_);
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/**
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* extcon_get_cable_state() - Get the status of a specific cable.
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* @edev: the extcon device that has the cable.
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* @cable_name: cable name.
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*
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* Note that this is slower than extcon_get_cable_state_.
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*/
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int extcon_get_cable_state(struct extcon_dev *edev, const char *cable_name)
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{
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int id;
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id = find_cable_id_by_name(edev, cable_name);
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if (id < 0)
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return id;
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return extcon_get_cable_state_(edev, id);
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}
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EXPORT_SYMBOL_GPL(extcon_get_cable_state);
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/**
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* extcon_set_cable_state_() - Set the status of a specific cable.
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* @edev: the extcon device that has the cable.
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@ -421,28 +370,6 @@ int extcon_set_cable_state_(struct extcon_dev *edev, unsigned int id,
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}
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EXPORT_SYMBOL_GPL(extcon_set_cable_state_);
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/**
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* extcon_set_cable_state() - Set the status of a specific cable.
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* @edev: the extcon device that has the cable.
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* @cable_name: cable name.
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* @cable_state: the new cable status. The default semantics is
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* true: attached / false: detached.
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*
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* Note that this is slower than extcon_set_cable_state_.
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*/
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int extcon_set_cable_state(struct extcon_dev *edev,
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const char *cable_name, bool cable_state)
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{
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int id;
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id = find_cable_id_by_name(edev, cable_name);
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if (id < 0)
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return id;
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return extcon_set_cable_state_(edev, id, cable_state);
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}
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EXPORT_SYMBOL_GPL(extcon_set_cable_state);
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/**
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* extcon_get_extcon_dev() - Get the extcon device instance from the name
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* @extcon_name: The extcon name provided with extcon_dev_register()
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@ -466,105 +393,6 @@ struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name)
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}
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EXPORT_SYMBOL_GPL(extcon_get_extcon_dev);
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/**
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* extcon_register_interest() - Register a notifier for a state change of a
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* specific cable, not an entier set of cables of a
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* extcon device.
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* @obj: an empty extcon_specific_cable_nb object to be returned.
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* @extcon_name: the name of extcon device.
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* if NULL, extcon_register_interest will register
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* every cable with the target cable_name given.
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* @cable_name: the target cable name.
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* @nb: the notifier block to get notified.
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*
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* Provide an empty extcon_specific_cable_nb. extcon_register_interest() sets
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* the struct for you.
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*
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* extcon_register_interest is a helper function for those who want to get
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* notification for a single specific cable's status change. If a user wants
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* to get notification for any changes of all cables of a extcon device,
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* he/she should use the general extcon_register_notifier().
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*
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* Note that the second parameter given to the callback of nb (val) is
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* "old_state", not the current state. The current state can be retrieved
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* by looking at the third pameter (edev pointer)'s state value.
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*/
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int extcon_register_interest(struct extcon_specific_cable_nb *obj,
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const char *extcon_name, const char *cable_name,
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struct notifier_block *nb)
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{
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unsigned long flags;
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int ret;
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if (!obj || !cable_name || !nb)
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return -EINVAL;
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if (extcon_name) {
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obj->edev = extcon_get_extcon_dev(extcon_name);
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if (!obj->edev)
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return -ENODEV;
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obj->cable_index = find_cable_index_by_name(obj->edev,
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cable_name);
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if (obj->cable_index < 0)
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return obj->cable_index;
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obj->user_nb = nb;
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spin_lock_irqsave(&obj->edev->lock, flags);
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ret = raw_notifier_chain_register(
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&obj->edev->nh[obj->cable_index],
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obj->user_nb);
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spin_unlock_irqrestore(&obj->edev->lock, flags);
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} else {
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struct class_dev_iter iter;
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struct extcon_dev *extd;
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struct device *dev;
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if (!extcon_class)
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return -ENODEV;
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class_dev_iter_init(&iter, extcon_class, NULL, NULL);
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while ((dev = class_dev_iter_next(&iter))) {
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extd = dev_get_drvdata(dev);
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if (find_cable_index_by_name(extd, cable_name) < 0)
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continue;
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class_dev_iter_exit(&iter);
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return extcon_register_interest(obj, extd->name,
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cable_name, nb);
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}
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ret = -ENODEV;
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}
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return ret;
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}
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EXPORT_SYMBOL_GPL(extcon_register_interest);
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/**
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* extcon_unregister_interest() - Unregister the notifier registered by
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* extcon_register_interest().
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* @obj: the extcon_specific_cable_nb object returned by
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* extcon_register_interest().
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*/
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int extcon_unregister_interest(struct extcon_specific_cable_nb *obj)
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{
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unsigned long flags;
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int ret;
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if (!obj)
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return -EINVAL;
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spin_lock_irqsave(&obj->edev->lock, flags);
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ret = raw_notifier_chain_unregister(
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&obj->edev->nh[obj->cable_index], obj->user_nb);
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spin_unlock_irqrestore(&obj->edev->lock, flags);
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return ret;
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}
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EXPORT_SYMBOL_GPL(extcon_unregister_interest);
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/**
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* extcon_register_notifier() - Register a notifiee to get notified by
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* any attach status changes from the extcon.
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@ -582,14 +410,33 @@ int extcon_register_notifier(struct extcon_dev *edev, unsigned int id,
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unsigned long flags;
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int ret, idx;
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if (!edev || !nb)
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if (!nb)
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return -EINVAL;
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idx = find_cable_index_by_id(edev, id);
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if (edev) {
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idx = find_cable_index_by_id(edev, id);
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spin_lock_irqsave(&edev->lock, flags);
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ret = raw_notifier_chain_register(&edev->nh[idx], nb);
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spin_unlock_irqrestore(&edev->lock, flags);
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spin_lock_irqsave(&edev->lock, flags);
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ret = raw_notifier_chain_register(&edev->nh[idx], nb);
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spin_unlock_irqrestore(&edev->lock, flags);
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} else {
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struct extcon_dev *extd;
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mutex_lock(&extcon_dev_list_lock);
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list_for_each_entry(extd, &extcon_dev_list, entry) {
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idx = find_cable_index_by_id(extd, id);
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if (idx >= 0)
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break;
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}
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mutex_unlock(&extcon_dev_list_lock);
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if (idx >= 0) {
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edev = extd;
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return extcon_register_notifier(extd, id, nb);
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} else {
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ret = -ENODEV;
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}
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}
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return ret;
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}
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@ -146,22 +146,6 @@ struct extcon_cable {
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struct attribute *attrs[3]; /* to be fed to attr_g.attrs */
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};
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/**
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* struct extcon_specific_cable_nb - An internal data for
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* extcon_register_interest().
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* @user_nb: user provided notifier block for events from
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* a specific cable.
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* @cable_index: the target cable.
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* @edev: the target extcon device.
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* @previous_value: the saved previous event value.
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*/
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struct extcon_specific_cable_nb {
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struct notifier_block *user_nb;
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int cable_index;
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struct extcon_dev *edev;
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unsigned long previous_value;
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};
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#if IS_ENABLED(CONFIG_EXTCON)
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/*
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@ -207,23 +191,6 @@ extern int extcon_get_cable_state_(struct extcon_dev *edev, unsigned int id);
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extern int extcon_set_cable_state_(struct extcon_dev *edev, unsigned int id,
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bool cable_state);
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extern int extcon_get_cable_state(struct extcon_dev *edev,
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const char *cable_name);
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extern int extcon_set_cable_state(struct extcon_dev *edev,
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const char *cable_name, bool cable_state);
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/*
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* Following APIs are for notifiees (those who want to be notified)
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* to register a callback for events from a specific cable of the extcon.
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* Notifiees are the connected device drivers wanting to get notified by
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* a specific external port of a connection device.
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*/
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extern int extcon_register_interest(struct extcon_specific_cable_nb *obj,
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const char *extcon_name,
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const char *cable_name,
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struct notifier_block *nb);
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extern int extcon_unregister_interest(struct extcon_specific_cable_nb *nb);
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/*
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* Following APIs are to monitor every action of a notifier.
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* Registrar gets notified for every external port of a connection device.
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@ -246,6 +213,7 @@ extern struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev,
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/* Following API to get information of extcon device */
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extern const char *extcon_get_edev_name(struct extcon_dev *edev);
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#else /* CONFIG_EXTCON */
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static inline int extcon_dev_register(struct extcon_dev *edev)
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{
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@ -306,18 +274,6 @@ static inline int extcon_set_cable_state_(struct extcon_dev *edev,
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return 0;
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}
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static inline int extcon_get_cable_state(struct extcon_dev *edev,
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const char *cable_name)
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{
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return 0;
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}
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static inline int extcon_set_cable_state(struct extcon_dev *edev,
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const char *cable_name, int state)
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{
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return 0;
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}
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static inline struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name)
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{
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return NULL;
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@ -337,24 +293,34 @@ static inline int extcon_unregister_notifier(struct extcon_dev *edev,
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return 0;
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}
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static inline int extcon_register_interest(struct extcon_specific_cable_nb *obj,
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const char *extcon_name,
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const char *cable_name,
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struct notifier_block *nb)
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{
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return 0;
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}
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static inline int extcon_unregister_interest(struct extcon_specific_cable_nb
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*obj)
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{
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return 0;
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}
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static inline struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev,
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int index)
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{
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return ERR_PTR(-ENODEV);
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}
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#endif /* CONFIG_EXTCON */
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/*
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* Following structure and API are deprecated. EXTCON remains the function
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* definition to prevent the build break.
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*/
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struct extcon_specific_cable_nb {
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struct notifier_block *user_nb;
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int cable_index;
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struct extcon_dev *edev;
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unsigned long previous_value;
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};
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static inline int extcon_register_interest(struct extcon_specific_cable_nb *obj,
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const char *extcon_name, const char *cable_name,
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struct notifier_block *nb)
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{
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return -EINVAL;
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}
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static inline int extcon_unregister_interest(struct extcon_specific_cable_nb
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*obj)
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{
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return -EINVAL;
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}
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#endif /* __LINUX_EXTCON_H__ */
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