On 04/19/2016 10:48 AM, Samuel Thibault wrote: > Hello, > > Peter Hurley, on Tue 19 Apr 2016 10:24:59 -0700, wrote: >> 1. a tty device (aliased as /dev/console) >> 2. struct console. For printk() messages. > > Ok, so you were talking about the second. > >> So if you want to hear boot messages, hooking up a line >> discipline isn't going to work. > > See the beginning of the thread: in this thread, we are not talking > about line disciplines to get the boot messages. We already have hooks > for that, see register_vt_notifier and notify_write to get text on the > fly, as well as screen_pos to get already-printed text. > > In this thread, we are talking about line disciplines to be able to > write the text on the serial port. That's the only way I'm aware of for > kernel drivers to do that, used e.g. by pcmouse, ppp, etc. > > We also need to be able to read, to know the progression of the > speech synthesis. > >> A clear statement of what you want to achieve will help me >> help you. > > From the kernel, open a serial port, and write/read text to/from it, > before /dev is mounted. Ok, good luck with that. Regards, Peter Hurley -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
