mirror of https://gitee.com/openkylin/linux.git
143 lines
4.3 KiB
C
143 lines
4.3 KiB
C
/*
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* External Connector (extcon) framework
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* - linux/include/linux/extcon-provider.h for extcon provider device driver.
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*
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* Copyright (C) 2017 Samsung Electronics
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* Author: Chanwoo Choi <cw00.choi@samsung.com>
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef __LINUX_EXTCON_PROVIDER_H__
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#define __LINUX_EXTCON_PROVIDER_H__
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#include <linux/extcon.h>
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struct extcon_dev;
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#if IS_ENABLED(CONFIG_EXTCON)
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/* Following APIs register/unregister the extcon device. */
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extern int extcon_dev_register(struct extcon_dev *edev);
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extern void extcon_dev_unregister(struct extcon_dev *edev);
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extern int devm_extcon_dev_register(struct device *dev,
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struct extcon_dev *edev);
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extern void devm_extcon_dev_unregister(struct device *dev,
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struct extcon_dev *edev);
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/* Following APIs allocate/free the memory of the extcon device. */
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extern struct extcon_dev *extcon_dev_allocate(const unsigned int *cable);
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extern void extcon_dev_free(struct extcon_dev *edev);
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extern struct extcon_dev *devm_extcon_dev_allocate(struct device *dev,
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const unsigned int *cable);
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extern void devm_extcon_dev_free(struct device *dev, struct extcon_dev *edev);
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/* Synchronize the state and property value for each external connector. */
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extern int extcon_sync(struct extcon_dev *edev, unsigned int id);
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/*
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* Following APIs set the connected state of each external connector.
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* The 'id' argument indicates the defined external connector.
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*/
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extern int extcon_set_state(struct extcon_dev *edev, unsigned int id,
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bool state);
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extern int extcon_set_state_sync(struct extcon_dev *edev, unsigned int id,
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bool state);
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/*
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* Following APIs set the property of each external connector.
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* The 'id' argument indicates the defined external connector
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* and the 'prop' indicates the extcon property.
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*
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* And extcon_set_property_capability() set the capability of the property
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* for each external connector. They are used to set the capability of the
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* property of each external connector based on the id and property.
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*/
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extern int extcon_set_property(struct extcon_dev *edev, unsigned int id,
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unsigned int prop,
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union extcon_property_value prop_val);
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extern int extcon_set_property_sync(struct extcon_dev *edev, unsigned int id,
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unsigned int prop,
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union extcon_property_value prop_val);
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extern int extcon_set_property_capability(struct extcon_dev *edev,
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unsigned int id, unsigned int prop);
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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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return 0;
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}
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static inline void extcon_dev_unregister(struct extcon_dev *edev) { }
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static inline int devm_extcon_dev_register(struct device *dev,
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struct extcon_dev *edev)
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{
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return -EINVAL;
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}
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static inline void devm_extcon_dev_unregister(struct device *dev,
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struct extcon_dev *edev) { }
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static inline struct extcon_dev *extcon_dev_allocate(const unsigned int *cable)
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{
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return ERR_PTR(-ENOSYS);
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}
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static inline void extcon_dev_free(struct extcon_dev *edev) { }
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static inline struct extcon_dev *devm_extcon_dev_allocate(struct device *dev,
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const unsigned int *cable)
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{
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return ERR_PTR(-ENOSYS);
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}
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static inline void devm_extcon_dev_free(struct extcon_dev *edev) { }
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static inline int extcon_set_state(struct extcon_dev *edev, unsigned int id,
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bool state)
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{
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return 0;
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}
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static inline int extcon_set_state_sync(struct extcon_dev *edev, unsigned int id,
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bool state)
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{
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return 0;
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}
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static inline int extcon_sync(struct extcon_dev *edev, unsigned int id)
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{
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return 0;
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}
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static inline int extcon_set_property(struct extcon_dev *edev, unsigned int id,
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unsigned int prop,
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union extcon_property_value prop_val)
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{
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return 0;
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}
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static inline int extcon_set_property_sync(struct extcon_dev *edev,
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unsigned int id, unsigned int prop,
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union extcon_property_value prop_val)
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{
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return 0;
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}
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static inline int extcon_set_property_capability(struct extcon_dev *edev,
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unsigned int id, unsigned int prop)
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{
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return 0;
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}
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#endif /* CONFIG_EXTCON */
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#endif /* __LINUX_EXTCON_PROVIDER_H__ */
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