1 /* SPDX-License-Identifier: GPL-2.0 */
2
3 #ifndef _INDUSTRIAL_IO_OPAQUE_H_
4 #define _INDUSTRIAL_IO_OPAQUE_H_
5
6 /**
7 * struct iio_dev_opaque - industrial I/O device opaque information
8 * @indio_dev: public industrial I/O device information
9 * @id: used to identify device internally
10 * @currentmode: operating mode currently in use, may be eventually
11 * checked by device drivers but should be considered
12 * read-only as this is a core internal bit
13 * @driver_module: used to make it harder to undercut users
14 * @mlock: lock used to prevent simultaneous device state changes
15 * @mlock_key: lockdep class for iio_dev lock
16 * @info_exist_lock: lock to prevent use during removal
17 * @trig_readonly: mark the current trigger immutable
18 * @event_interface: event chrdevs associated with interrupt lines
19 * @attached_buffers: array of buffers statically attached by the driver
20 * @attached_buffers_cnt: number of buffers in the array of statically attached buffers
21 * @buffer_ioctl_handler: ioctl() handler for this IIO device's buffer interface
22 * @buffer_list: list of all buffers currently attached
23 * @channel_attr_list: keep track of automatically created channel
24 * attributes
25 * @chan_attr_group: group for all attrs in base directory
26 * @ioctl_handlers: ioctl handlers registered with the core handler
27 * @groups: attribute groups
28 * @groupcounter: index of next attribute group
29 * @legacy_scan_el_group: attribute group for legacy scan elements attribute group
30 * @legacy_buffer_group: attribute group for legacy buffer attributes group
31 * @bounce_buffer: for devices that call iio_push_to_buffers_with_timestamp_unaligned()
32 * @bounce_buffer_size: size of currently allocate bounce buffer
33 * @scan_index_timestamp: cache of the index to the timestamp
34 * @clock_id: timestamping clock posix identifier
35 * @chrdev: associated character device
36 * @flags: file ops related flags including busy flag.
37 * @debugfs_dentry: device specific debugfs dentry
38 * @cached_reg_addr: cached register address for debugfs reads
39 * @read_buf: read buffer to be used for the initial reg read
40 * @read_buf_len: data length in @read_buf
41 */
42 struct iio_dev_opaque {
43 struct iio_dev indio_dev;
44 int currentmode;
45 int id;
46 struct module *driver_module;
47 struct mutex mlock;
48 struct lock_class_key mlock_key;
49 struct mutex info_exist_lock;
50 bool trig_readonly;
51 struct iio_event_interface *event_interface;
52 struct iio_buffer **attached_buffers;
53 unsigned int attached_buffers_cnt;
54 struct iio_ioctl_handler *buffer_ioctl_handler;
55 struct list_head buffer_list;
56 struct list_head channel_attr_list;
57 struct attribute_group chan_attr_group;
58 struct list_head ioctl_handlers;
59 const struct attribute_group **groups;
60 int groupcounter;
61 struct attribute_group legacy_scan_el_group;
62 struct attribute_group legacy_buffer_group;
63 void *bounce_buffer;
64 size_t bounce_buffer_size;
65
66 unsigned int scan_index_timestamp;
67 clockid_t clock_id;
68 struct cdev chrdev;
69 unsigned long flags;
70
71 #if defined(CONFIG_DEBUG_FS)
72 struct dentry *debugfs_dentry;
73 unsigned cached_reg_addr;
74 char read_buf[20];
75 unsigned int read_buf_len;
76 #endif
77 };
78
79 #define to_iio_dev_opaque(_indio_dev) \
80 container_of((_indio_dev), struct iio_dev_opaque, indio_dev)
81
82 #endif
83
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