92 lines
2.8 KiB
C
92 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2019-2020 Intel Corporation
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*
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* Please see Documentation/driver-api/auxiliary_bus.rst for more information.
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*/
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#ifndef _AUXILIARY_BUS_H_
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#define _AUXILIARY_BUS_H_
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#include <linux/device.h>
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#include <linux/mod_devicetable.h>
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struct auxiliary_device {
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struct device dev;
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const char *name;
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u32 id;
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};
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struct auxiliary_driver {
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int (*probe)(struct auxiliary_device *auxdev, const struct auxiliary_device_id *id);
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int (*remove)(struct auxiliary_device *auxdev);
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void (*shutdown)(struct auxiliary_device *auxdev);
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int (*suspend)(struct auxiliary_device *auxdev, pm_message_t state);
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int (*resume)(struct auxiliary_device *auxdev);
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const char *name;
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struct device_driver driver;
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const struct auxiliary_device_id *id_table;
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};
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static inline void *auxiliary_get_drvdata(struct auxiliary_device *auxdev)
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{
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return dev_get_drvdata(&auxdev->dev);
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}
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static inline void auxiliary_set_drvdata(struct auxiliary_device *auxdev, void *data)
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{
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dev_set_drvdata(&auxdev->dev, data);
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}
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static inline struct auxiliary_device *to_auxiliary_dev(struct device *dev)
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{
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return container_of(dev, struct auxiliary_device, dev);
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}
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static inline struct auxiliary_driver *to_auxiliary_drv(struct device_driver *drv)
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{
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return container_of(drv, struct auxiliary_driver, driver);
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}
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int auxiliary_device_init(struct auxiliary_device *auxdev);
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int __auxiliary_device_add(struct auxiliary_device *auxdev, const char *modname);
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#define auxiliary_device_add(auxdev) __auxiliary_device_add(auxdev, KBUILD_MODNAME)
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static inline void auxiliary_device_uninit(struct auxiliary_device *auxdev)
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{
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put_device(&auxdev->dev);
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}
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static inline void auxiliary_device_delete(struct auxiliary_device *auxdev)
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{
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device_del(&auxdev->dev);
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}
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int __auxiliary_driver_register(struct auxiliary_driver *auxdrv, struct module *owner,
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const char *modname);
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#define auxiliary_driver_register(auxdrv) \
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__auxiliary_driver_register(auxdrv, THIS_MODULE, KBUILD_MODNAME)
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void auxiliary_driver_unregister(struct auxiliary_driver *auxdrv);
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/**
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* module_auxiliary_driver() - Helper macro for registering an auxiliary driver
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* @__auxiliary_driver: auxiliary driver struct
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*
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* Helper macro for auxiliary drivers which do not do anything special in
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* module init/exit. This eliminates a lot of boilerplate. Each module may only
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* use this macro once, and calling it replaces module_init() and module_exit()
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*
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* .. code-block:: c
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*
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* module_auxiliary_driver(my_drv);
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*/
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#define module_auxiliary_driver(__auxiliary_driver) \
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module_driver(__auxiliary_driver, auxiliary_driver_register, auxiliary_driver_unregister)
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struct auxiliary_device *auxiliary_find_device(struct device *start,
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const void *data,
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int (*match)(struct device *dev, const void *data));
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#endif /* _AUXILIARY_BUS_H_ */
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