'How to write to `/dev/ttyUSB?` in kernel space?
i want to send and receive data from/to an arduino connected to a /dev/ttyUSB port (serial) from a kernel module. i have seen enough ways how to do it in userspace, but that's not my question.
it would really help to be able to access a tty by major and minor numbers (188, 0 for /dev/ttyUSB0) as i dont want to use file io in a kernel module
related but didnt answer my question:
How to write to a tty from kernel space with only major and minor device numbers available? (1 answer but uses userspace)
Access /dev/ttyACM0 from kernel (no answers yet)
How can I write to TTY from a kernel module? (1 answer but how to get the struct tty_struct from a serial port?)
Read and write to Arduino serial using a kernel module (1 answer but uses file io and alternative is too vague)
https://unix.stackexchange.com/questions/585573/how-does-serial-driver-get-attached-to-a-tty-port (no answers yet)
Solution 1:[1]
SappyInsane on linuxquestions had the same problem and gave me his solution which worked https://www.linuxquestions.org/questions/linux-kernel-70/reading-from-arduino-serial-in-a-kernel-module-4175704822/
Sources
This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.
Source: Stack Overflow
| Solution | Source |
|---|---|
| Solution 1 | Antoni |