tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
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 * @info_exist_key: lockdep class for info_exist lock
18 * @trig_readonly: mark the current trigger immutable
19 * @event_interface: event chrdevs associated with interrupt lines
20 * @attached_buffers: array of buffers statically attached by the driver
21 * @attached_buffers_cnt: number of buffers in the array of statically attached buffers
22 * @buffer_ioctl_handler: ioctl() handler for this IIO device's buffer interface
23 * @buffer_list: list of all buffers currently attached
24 * @channel_attr_list: keep track of automatically created channel
25 * attributes
26 * @chan_attr_group: group for all attrs in base directory
27 * @ioctl_handlers: ioctl handlers registered with the core handler
28 * @groups: attribute groups
29 * @groupcounter: index of next attribute group
30 * @legacy_scan_el_group: attribute group for legacy scan elements attribute group
31 * @legacy_buffer_group: attribute group for legacy buffer attributes group
32 * @bounce_buffer: for devices that call iio_push_to_buffers_with_ts_unaligned()
33 * @bounce_buffer_size: size of currently allocate bounce buffer
34 * @scan_index_timestamp: cache of the index to the timestamp
35 * @clock_id: timestamping clock posix identifier
36 * @chrdev: associated character device
37 * @flags: file ops related flags including busy flag.
38 * @debugfs_dentry: device specific debugfs dentry
39 * @cached_reg_addr: cached register address for debugfs reads
40 * @read_buf: read buffer to be used for the initial reg read
41 * @read_buf_len: data length in @read_buf
42 */
43struct iio_dev_opaque {
44 struct iio_dev indio_dev;
45 int currentmode;
46 int id;
47 struct module *driver_module;
48 struct mutex mlock;
49 struct lock_class_key mlock_key;
50 struct mutex info_exist_lock;
51 struct lock_class_key info_exist_key;
52 bool trig_readonly;
53 struct iio_event_interface *event_interface;
54 struct iio_buffer **attached_buffers;
55 unsigned int attached_buffers_cnt;
56 struct iio_ioctl_handler *buffer_ioctl_handler;
57 struct list_head buffer_list;
58 struct list_head channel_attr_list;
59 struct attribute_group chan_attr_group;
60 struct list_head ioctl_handlers;
61 const struct attribute_group **groups;
62 int groupcounter;
63 struct attribute_group legacy_scan_el_group;
64 struct attribute_group legacy_buffer_group;
65 void *bounce_buffer;
66 size_t bounce_buffer_size;
67
68 unsigned int scan_index_timestamp;
69 clockid_t clock_id;
70 struct cdev chrdev;
71 unsigned long flags;
72
73#if defined(CONFIG_DEBUG_FS)
74 struct dentry *debugfs_dentry;
75 unsigned int cached_reg_addr;
76 char read_buf[20];
77 unsigned int read_buf_len;
78#endif
79};
80
81#define to_iio_dev_opaque(_indio_dev) \
82 container_of((_indio_dev), struct iio_dev_opaque, indio_dev)
83
84#endif