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 int 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