1What: /dev/fieldbus_devX 2Date: December 2018 3KernelVersion: 5.1 (staging) 4Contact: Sven Van Asbroeck <TheSven73@gmail.com> 5Description: 6 The cdev interface to drivers for Fieldbus Device Memory 7 (aka. Process Memory). 8 9 The following file operations are supported: 10 11 open(2) 12 Create an I/O context associated with the file descriptor. 13 14 read(2) 15 Read from Process Memory's "read area". 16 Clears POLLERR | POLLPRI from the file descriptor. 17 18 write(2) 19 Write to Process Memory's "write area". 20 21 poll(2), select(2), epoll_wait(2) etc. 22 When a "Process Memory Read Area Changed" event occurs, 23 POLLERR | POLLPRI will be set on the file descriptor. 24 Note that POLLIN | POLLOUT events are always set, because the 25 process memory area is always readable and writable. 26 27 close(2) 28 Free up the I/O context that was associated 29 with the file descriptor. 30 31Users: TBD 32