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Auxiliary Bus support tag for 5.11-rc1

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This is a signed tag for other subsystems to be able to pull in the
 auxiliary bus support into their trees for the 5.11-rc1 merge.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'auxbus-5.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core into driver-core-next

Auxiliary Bus support tag for 5.11-rc1

This is a signed tag for other subsystems to be able to pull in the
auxiliary bus support into their trees for the 5.11-rc1 merge.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2020-12-04 13:37:13 +01:00
commit 2e37d91cad
9 changed files with 609 additions and 0 deletions
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77
include/linux/auxiliary_bus.h Normal file
View file

@ -0,0 +1,77 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2019-2020 Intel Corporation
*
* Please see Documentation/driver-api/auxiliary_bus.rst for more information.
*/
#ifndef _AUXILIARY_BUS_H_
#define _AUXILIARY_BUS_H_
#include <linux/device.h>
#include <linux/mod_devicetable.h>
struct auxiliary_device {
struct device dev;
const char *name;
u32 id;
};
struct auxiliary_driver {
int (*probe)(struct auxiliary_device *auxdev, const struct auxiliary_device_id *id);
void (*remove)(struct auxiliary_device *auxdev);
void (*shutdown)(struct auxiliary_device *auxdev);
int (*suspend)(struct auxiliary_device *auxdev, pm_message_t state);
int (*resume)(struct auxiliary_device *auxdev);
const char *name;
struct device_driver driver;
const struct auxiliary_device_id *id_table;
};
static inline struct auxiliary_device *to_auxiliary_dev(struct device *dev)
{
return container_of(dev, struct auxiliary_device, dev);
}
static inline struct auxiliary_driver *to_auxiliary_drv(struct device_driver *drv)
{
return container_of(drv, struct auxiliary_driver, driver);
}
int auxiliary_device_init(struct auxiliary_device *auxdev);
int __auxiliary_device_add(struct auxiliary_device *auxdev, const char *modname);
#define auxiliary_device_add(auxdev) __auxiliary_device_add(auxdev, KBUILD_MODNAME)
static inline void auxiliary_device_uninit(struct auxiliary_device *auxdev)
{
put_device(&auxdev->dev);
}
static inline void auxiliary_device_delete(struct auxiliary_device *auxdev)
{
device_del(&auxdev->dev);
}
int __auxiliary_driver_register(struct auxiliary_driver *auxdrv, struct module *owner,
const char *modname);
#define auxiliary_driver_register(auxdrv) \
__auxiliary_driver_register(auxdrv, THIS_MODULE, KBUILD_MODNAME)
void auxiliary_driver_unregister(struct auxiliary_driver *auxdrv);
/**
* module_auxiliary_driver() - Helper macro for registering an auxiliary driver
* @__auxiliary_driver: auxiliary driver struct
*
* Helper macro for auxiliary drivers which do not do anything special in
* module init/exit. This eliminates a lot of boilerplate. Each module may only
* use this macro once, and calling it replaces module_init() and module_exit()
*/
#define module_auxiliary_driver(__auxiliary_driver) \
module_driver(__auxiliary_driver, auxiliary_driver_register, auxiliary_driver_unregister)
struct auxiliary_device *auxiliary_find_device(struct device *start,
const void *data,
int (*match)(struct device *dev, const void *data));
#endif /* _AUXILIARY_BUS_H_ */

8
include/linux/mod_devicetable.h
View file

@ -838,4 +838,12 @@ struct mhi_device_id {
kernel_ulong_t driver_data;
};
#define AUXILIARY_NAME_SIZE 32
#define AUXILIARY_MODULE_PREFIX "auxiliary:"
struct auxiliary_device_id {
char name[AUXILIARY_NAME_SIZE];
kernel_ulong_t driver_data;
};
#endif /* LINUX_MOD_DEVICETABLE_H */