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Commit ea6eb0f3 authored by Mayank Rana's avatar Mayank Rana Committed by Hridya Valsaraju
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ANDROID: GKI: extcon: Add extcon_register_blocking_notifier API. 



This change adds the extcon_register_blocking_notifier
API to register blocking notifier calls
for blocking functionality using extcon framework.

Bug: 150893404
Test: make
Signed-off-by: default avatarMayank Rana <mrana@codeaurora.org>
Signed-off-by: default avatarJack Pham <jackp@codeaurora.org>
Change-Id: I28d56bd898beea1da1f8c315602cc404e8bc326f
(cherry picked from commit 9dce266c)
[hridya: commit modified to only include ABI diff].
Signed-off-by: default avatarHridya Valsaraju <hridya@google.com>
parent cb57b8b8

drivers/extcon/extcon.c

+16 −0
Original line number Diff line number Diff line
@@ -925,6 +925,22 @@ int extcon_register_notifier(struct extcon_dev *edev, unsigned int id, 
}

EXPORT_SYMBOL_GPL(extcon_register_notifier);



int extcon_register_blocking_notifier(struct extcon_dev *edev, unsigned int id,

			struct notifier_block *nb)

{

	int idx = -EINVAL;



	if (!edev || !nb)

		return -EINVAL;



	idx = find_cable_index_by_id(edev, id);

	if (idx < 0)

		return idx;



	return blocking_notifier_chain_register(&edev->bnh[idx], nb);

}

EXPORT_SYMBOL(extcon_register_blocking_notifier);



/**

 * extcon_unregister_notifier() - Unregister a notifier block from the extcon.

 * @edev:	the extcon device

drivers/extcon/extcon.h

+1 −0
Original line number Diff line number Diff line
@@ -48,6 +48,7 @@ struct extcon_dev { 
	struct device dev;

	struct raw_notifier_head nh_all;

	struct raw_notifier_head *nh;

	struct blocking_notifier_head *bnh;

	struct list_head entry;

	int max_supported;

	spinlock_t lock;	/* could be called by irq handler */

include/linux/extcon.h

+9 −0
Original line number Diff line number Diff line
@@ -208,6 +208,8 @@ extern int extcon_register_notifier(struct extcon_dev *edev, unsigned int id, 
				struct notifier_block *nb);

extern int extcon_unregister_notifier(struct extcon_dev *edev, unsigned int id,

				struct notifier_block *nb);

extern int extcon_register_blocking_notifier(struct extcon_dev *edev,

		unsigned int id, struct notifier_block *nb);

extern int devm_extcon_register_notifier(struct device *dev,

				struct extcon_dev *edev, unsigned int id,

				struct notifier_block *nb);
@@ -268,6 +270,13 @@ static inline int extcon_unregister_notifier(struct extcon_dev *edev, 
	return 0;

}



static inline int extcon_register_blocking_notifier(struct extcon_dev *edev,

					unsigned int id,

					struct notifier_block *nb)

{

	return 0;

}



static inline int devm_extcon_register_notifier(struct device *dev,

				struct extcon_dev *edev, unsigned int id,

				struct notifier_block *nb)