diff options
Diffstat (limited to 'include/linux/extcon.h')
| -rw-r--r-- | include/linux/extcon.h | 253 |
1 files changed, 74 insertions, 179 deletions
diff --git a/include/linux/extcon.h b/include/linux/extcon.h index 7e206a9f88db..e596a0abcb27 100644 --- a/include/linux/extcon.h +++ b/include/linux/extcon.h @@ -1,5 +1,7 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ /* - * External connector (extcon) class driver + * External Connector (extcon) framework + * - linux/include/linux/extcon.h for extcon consumer device driver. * * Copyright (C) 2015 Samsung Electronics * Author: Chanwoo Choi <cw00.choi@samsung.com> @@ -11,17 +13,7 @@ * based on switch class driver * Copyright (C) 2008 Google, Inc. * Author: Mike Lockwood <lockwood@android.com> - * - * This software is licensed under the terms of the GNU General Public - * License version 2, as published by the Free Software Foundation, and - * may be copied, distributed, and modified under those terms. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * -*/ + */ #ifndef __LINUX_EXTCON_H__ #define __LINUX_EXTCON_H__ @@ -84,6 +76,8 @@ #define EXTCON_DISP_VGA 43 /* Video Graphics Array */ #define EXTCON_DISP_DP 44 /* Display Port */ #define EXTCON_DISP_HMD 45 /* Head-Mounted Display */ +#define EXTCON_DISP_CVBS 46 /* Composite Video Broadcast Signal */ +#define EXTCON_DISP_EDP 47 /* Embedded Display Port */ /* Miscellaneous external connector */ #define EXTCON_DOCK 60 @@ -93,7 +87,7 @@ #define EXTCON_NUM 63 /* - * Define the property of supported external connectors. + * Define the properties of supported external connectors. * * When adding the new extcon property, they *must* have * the type/value/default information. Also, you *have to* @@ -171,231 +165,156 @@ union extcon_property_value { int intval; /* type : integer (intval) */ }; -struct extcon_cable; struct extcon_dev; #if IS_ENABLED(CONFIG_EXTCON) - -/* - * Following APIs are for notifiers or configurations. - * Notifiers are the external port and connection devices. - */ -extern int extcon_dev_register(struct extcon_dev *edev); -extern void extcon_dev_unregister(struct extcon_dev *edev); -extern int devm_extcon_dev_register(struct device *dev, - struct extcon_dev *edev); -extern void devm_extcon_dev_unregister(struct device *dev, - struct extcon_dev *edev); -extern struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name); - -/* - * Following APIs control the memory of extcon device. - */ -extern struct extcon_dev *extcon_dev_allocate(const unsigned int *cable); -extern void extcon_dev_free(struct extcon_dev *edev); -extern struct extcon_dev *devm_extcon_dev_allocate(struct device *dev, - const unsigned int *cable); -extern void devm_extcon_dev_free(struct device *dev, struct extcon_dev *edev); - -/* - * get/set_state access each bit of the 32b encoded state value. - * They are used to access the status of each cable based on the cable id. - */ -extern int extcon_get_state(struct extcon_dev *edev, unsigned int id); -extern int extcon_set_state(struct extcon_dev *edev, unsigned int id, - bool cable_state); -extern int extcon_set_state_sync(struct extcon_dev *edev, unsigned int id, - bool cable_state); /* - * Synchronize the state and property data for a specific external connector. + * Following APIs get the connected state of each external connector. + * The 'id' argument indicates the defined external connector. */ -extern int extcon_sync(struct extcon_dev *edev, unsigned int id); +int extcon_get_state(struct extcon_dev *edev, unsigned int id); /* - * get/set_property access the property value of each external connector. - * They are used to access the property of each cable based on the property id. + * Following APIs get the property of each external connector. + * The 'id' argument indicates the defined external connector + * and the 'prop' indicates the extcon property. + * + * And extcon_get_property_capability() get the capability of the property + * for each external connector. They are used to get the capability of the + * property of each external connector based on the id and property. */ -extern int extcon_get_property(struct extcon_dev *edev, unsigned int id, +int extcon_get_property(struct extcon_dev *edev, unsigned int id, unsigned int prop, union extcon_property_value *prop_val); -extern int extcon_set_property(struct extcon_dev *edev, unsigned int id, - unsigned int prop, - union extcon_property_value prop_val); -extern int extcon_set_property_sync(struct extcon_dev *edev, unsigned int id, - unsigned int prop, - union extcon_property_value prop_val); - -/* - * get/set_property_capability set the capability of the property for each - * external connector. They are used to set the capability of the property - * of each external connector based on the id and property. - */ -extern int extcon_get_property_capability(struct extcon_dev *edev, - unsigned int id, unsigned int prop); -extern int extcon_set_property_capability(struct extcon_dev *edev, +int extcon_get_property_capability(struct extcon_dev *edev, unsigned int id, unsigned int prop); /* - * Following APIs are to monitor the status change of the external connectors. + * Following APIs register the notifier block in order to detect + * the change of both state and property value for each external connector. + * * extcon_register_notifier(*edev, id, *nb) : Register a notifier block * for specific external connector of the extcon. * extcon_register_notifier_all(*edev, *nb) : Register a notifier block * for all supported external connectors of the extcon. */ -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 devm_extcon_register_notifier(struct device *dev, +int extcon_register_notifier(struct extcon_dev *edev, unsigned int id, + struct notifier_block *nb); +int extcon_unregister_notifier(struct extcon_dev *edev, unsigned int id, + struct notifier_block *nb); +int devm_extcon_register_notifier(struct device *dev, struct extcon_dev *edev, unsigned int id, struct notifier_block *nb); -extern void devm_extcon_unregister_notifier(struct device *dev, +void devm_extcon_unregister_notifier(struct device *dev, struct extcon_dev *edev, unsigned int id, struct notifier_block *nb); -extern int extcon_register_notifier_all(struct extcon_dev *edev, +int extcon_register_notifier_all(struct extcon_dev *edev, struct notifier_block *nb); -extern int extcon_unregister_notifier_all(struct extcon_dev *edev, +int extcon_unregister_notifier_all(struct extcon_dev *edev, struct notifier_block *nb); -extern int devm_extcon_register_notifier_all(struct device *dev, +int devm_extcon_register_notifier_all(struct device *dev, struct extcon_dev *edev, struct notifier_block *nb); -extern void devm_extcon_unregister_notifier_all(struct device *dev, +void devm_extcon_unregister_notifier_all(struct device *dev, struct extcon_dev *edev, struct notifier_block *nb); /* - * Following API get the extcon device from devicetree. - * This function use phandle of devicetree to get extcon device directly. + * Following APIs get the extcon_dev from devicetree or by through extcon name. */ -extern struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, +struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name); +struct extcon_dev *extcon_find_edev_by_node(struct device_node *node); +struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index); -/* Following API to get information of extcon device */ -extern const char *extcon_get_edev_name(struct extcon_dev *edev); - +/* Following API get the name of extcon device. */ +const char *extcon_get_edev_name(struct extcon_dev *edev); #else /* CONFIG_EXTCON */ -static inline int extcon_dev_register(struct extcon_dev *edev) -{ - return 0; -} - -static inline void extcon_dev_unregister(struct extcon_dev *edev) { } - -static inline int devm_extcon_dev_register(struct device *dev, - struct extcon_dev *edev) -{ - return -EINVAL; -} - -static inline void devm_extcon_dev_unregister(struct device *dev, - struct extcon_dev *edev) { } - -static inline struct extcon_dev *extcon_dev_allocate(const unsigned int *cable) -{ - return ERR_PTR(-ENOSYS); -} - -static inline void extcon_dev_free(struct extcon_dev *edev) { } - -static inline struct extcon_dev *devm_extcon_dev_allocate(struct device *dev, - const unsigned int *cable) -{ - return ERR_PTR(-ENOSYS); -} - -static inline void devm_extcon_dev_free(struct extcon_dev *edev) { } - - static inline int extcon_get_state(struct extcon_dev *edev, unsigned int id) { return 0; } -static inline int extcon_set_state(struct extcon_dev *edev, unsigned int id, - bool cable_state) +static inline int extcon_get_property(struct extcon_dev *edev, unsigned int id, + unsigned int prop, + union extcon_property_value *prop_val) { return 0; } -static inline int extcon_set_state_sync(struct extcon_dev *edev, unsigned int id, - bool cable_state) +static inline int extcon_get_property_capability(struct extcon_dev *edev, + unsigned int id, unsigned int prop) { return 0; } -static inline int extcon_sync(struct extcon_dev *edev, unsigned int id) +static inline int extcon_register_notifier(struct extcon_dev *edev, + unsigned int id, struct notifier_block *nb) { return 0; } -static inline int extcon_get_property(struct extcon_dev *edev, unsigned int id, - unsigned int prop, - union extcon_property_value *prop_val) +static inline int extcon_unregister_notifier(struct extcon_dev *edev, + unsigned int id, struct notifier_block *nb) { return 0; } -static inline int extcon_set_property(struct extcon_dev *edev, unsigned int id, - unsigned int prop, - union extcon_property_value prop_val) + +static inline int devm_extcon_register_notifier(struct device *dev, + struct extcon_dev *edev, unsigned int id, + struct notifier_block *nb) { - return 0; + return -ENOSYS; } -static inline int extcon_set_property_sync(struct extcon_dev *edev, - unsigned int id, unsigned int prop, - union extcon_property_value prop_val) +static inline void devm_extcon_unregister_notifier(struct device *dev, + struct extcon_dev *edev, unsigned int id, + struct notifier_block *nb) { } + +static inline int extcon_register_notifier_all(struct extcon_dev *edev, + struct notifier_block *nb) { return 0; } -static inline int extcon_get_property_capability(struct extcon_dev *edev, - unsigned int id, unsigned int prop) +static inline int extcon_unregister_notifier_all(struct extcon_dev *edev, + struct notifier_block *nb) { return 0; } -static inline int extcon_set_property_capability(struct extcon_dev *edev, - unsigned int id, unsigned int prop) +static inline int devm_extcon_register_notifier_all(struct device *dev, + struct extcon_dev *edev, + struct notifier_block *nb) { return 0; } +static inline void devm_extcon_unregister_notifier_all(struct device *dev, + struct extcon_dev *edev, + struct notifier_block *nb) { } + static inline struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name) { return NULL; } -static inline int extcon_register_notifier(struct extcon_dev *edev, - unsigned int id, - struct notifier_block *nb) +static inline struct extcon_dev *extcon_find_edev_by_node(struct device_node *node) { - return 0; -} - -static inline int extcon_unregister_notifier(struct extcon_dev *edev, - unsigned int id, - struct notifier_block *nb) -{ - return 0; + return ERR_PTR(-ENODEV); } -static inline int devm_extcon_register_notifier(struct device *dev, - struct extcon_dev *edev, unsigned int id, - struct notifier_block *nb) +static inline struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, + int index) { - return -ENOSYS; + return ERR_PTR(-ENODEV); } -static inline void devm_extcon_unregister_notifier(struct device *dev, - struct extcon_dev *edev, unsigned int id, - struct notifier_block *nb) { } - -static inline struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, - int index) +static inline const char *extcon_get_edev_name(struct extcon_dev *edev) { - return ERR_PTR(-ENODEV); + return NULL; } #endif /* CONFIG_EXTCON */ @@ -409,28 +328,4 @@ struct extcon_specific_cable_nb { struct extcon_dev *edev; unsigned long previous_value; }; - -static inline int extcon_register_interest(struct extcon_specific_cable_nb *obj, - const char *extcon_name, const char *cable_name, - struct notifier_block *nb) -{ - return -EINVAL; -} - -static inline int extcon_unregister_interest(struct extcon_specific_cable_nb - *obj) -{ - return -EINVAL; -} - -static inline int extcon_get_cable_state_(struct extcon_dev *edev, unsigned int id) -{ - return extcon_get_state(edev, id); -} - -static inline int extcon_set_cable_state_(struct extcon_dev *edev, unsigned int id, - bool cable_state) -{ - return extcon_set_state_sync(edev, id, cable_state); -} #endif /* __LINUX_EXTCON_H__ */ |