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 * @driver_module: used to make it harder to undercut users 11 * @info_exist_lock: lock to prevent use during removal 12 * @trig_readonly: mark the current trigger immutable 13 * @event_interface: event chrdevs associated with interrupt lines 14 * @attached_buffers: array of buffers statically attached by the driver 15 * @attached_buffers_cnt: number of buffers in the array of statically attached buffers 16 * @buffer_ioctl_handler: ioctl() handler for this IIO device's buffer interface 17 * @buffer_list: list of all buffers currently attached 18 * @channel_attr_list: keep track of automatically created channel 19 * attributes 20 * @chan_attr_group: group for all attrs in base directory 21 * @ioctl_handlers: ioctl handlers registered with the core handler 22 * @groups: attribute groups 23 * @groupcounter: index of next attribute group 24 * @legacy_scan_el_group: attribute group for legacy scan elements attribute group 25 * @legacy_buffer_group: attribute group for legacy buffer attributes group 26 * @scan_index_timestamp: cache of the index to the timestamp 27 * @clock_id: timestamping clock posix identifier 28 * @chrdev: associated character device 29 * @flags: file ops related flags including busy flag. 30 * @debugfs_dentry: device specific debugfs dentry 31 * @cached_reg_addr: cached register address for debugfs reads 32 * @read_buf: read buffer to be used for the initial reg read 33 * @read_buf_len: data length in @read_buf 34 */ 35 struct iio_dev_opaque { 36 struct iio_dev indio_dev; 37 int id; 38 struct module *driver_module; 39 struct mutex info_exist_lock; 40 bool trig_readonly; 41 struct iio_event_interface *event_interface; 42 struct iio_buffer **attached_buffers; 43 unsigned int attached_buffers_cnt; 44 struct iio_ioctl_handler *buffer_ioctl_handler; 45 struct list_head buffer_list; 46 struct list_head channel_attr_list; 47 struct attribute_group chan_attr_group; 48 struct list_head ioctl_handlers; 49 const struct attribute_group **groups; 50 int groupcounter; 51 struct attribute_group legacy_scan_el_group; 52 struct attribute_group legacy_buffer_group; 53 54 unsigned int scan_index_timestamp; 55 clockid_t clock_id; 56 struct cdev chrdev; 57 unsigned long flags; 58 59 #if defined(CONFIG_DEBUG_FS) 60 struct dentry *debugfs_dentry; 61 unsigned cached_reg_addr; 62 char read_buf[20]; 63 unsigned int read_buf_len; 64 #endif 65 }; 66 67 #define to_iio_dev_opaque(_indio_dev) \ 68 container_of((_indio_dev), struct iio_dev_opaque, indio_dev) 69 70 #endif 71