xref: /openbmc/linux/include/linux/iio/sw_device.h (revision d2912cb1)
1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Industrial I/O software device interface
4  *
5  * Copyright (c) 2016 Intel Corporation
6  */
7 
8 #ifndef __IIO_SW_DEVICE
9 #define __IIO_SW_DEVICE
10 
11 #include <linux/module.h>
12 #include <linux/device.h>
13 #include <linux/iio/iio.h>
14 #include <linux/configfs.h>
15 
16 #define module_iio_sw_device_driver(__iio_sw_device_type) \
17 	module_driver(__iio_sw_device_type, iio_register_sw_device_type, \
18 		      iio_unregister_sw_device_type)
19 
20 struct iio_sw_device_ops;
21 
22 struct iio_sw_device_type {
23 	const char *name;
24 	struct module *owner;
25 	const struct iio_sw_device_ops *ops;
26 	struct list_head list;
27 	struct config_group *group;
28 };
29 
30 struct iio_sw_device {
31 	struct iio_dev *device;
32 	struct iio_sw_device_type *device_type;
33 	struct config_group group;
34 };
35 
36 struct iio_sw_device_ops {
37 	struct iio_sw_device* (*probe)(const char *);
38 	int (*remove)(struct iio_sw_device *);
39 };
40 
41 static inline
to_iio_sw_device(struct config_item * item)42 struct iio_sw_device *to_iio_sw_device(struct config_item *item)
43 {
44 	return container_of(to_config_group(item), struct iio_sw_device,
45 			    group);
46 }
47 
48 int iio_register_sw_device_type(struct iio_sw_device_type *dt);
49 void iio_unregister_sw_device_type(struct iio_sw_device_type *dt);
50 
51 struct iio_sw_device *iio_sw_device_create(const char *, const char *);
52 void iio_sw_device_destroy(struct iio_sw_device *);
53 
54 int iio_sw_device_type_configfs_register(struct iio_sw_device_type *dt);
55 void iio_sw_device_type_configfs_unregister(struct iio_sw_device_type *dt);
56 
57 static inline
iio_swd_group_init_type_name(struct iio_sw_device * d,const char * name,const struct config_item_type * type)58 void iio_swd_group_init_type_name(struct iio_sw_device *d,
59 				  const char *name,
60 				  const struct config_item_type *type)
61 {
62 #if IS_ENABLED(CONFIG_CONFIGFS_FS)
63 	config_group_init_type_name(&d->group, name, type);
64 #endif
65 }
66 
67 #endif /* __IIO_SW_DEVICE */
68