Serial driver in-band control message

Serial driver in-band control message

[Ramon Fried]

Hi.
I'm developing a driver for a rather weird serial controller hardware.
The HW allows the host to put it in low power state.
The command for entering low power is an ASCII message sent in-band.

Till now, I used a user-space application to open the TTY port and send the command through it.
This is not acceptable solution as the device needs to be put in low power mode by its driver in the kernel.

I didn't find any example or reference on how to write characters to the serial device, or how to open and write to the  TTY device from the kernel space.
I guess this is discouraged. Do I have any other options to do so from the kernel space ?

Warm regards,
Ramon

Serial driver in-band control message

[Valdis.Kletnieks at vt.edu]

On Wed, 20 Apr 2016 22:27:27 -0000, Ramon Fried said:

> I'm developing a driver for a rather weird serial controller hardware.
> The HW allows the host to put it in low power state.
> The command for entering low power is an ASCII message sent in-band.

Do you happen to have the contact info for the vendor's pharmaceutical
supplier?  They obviously have some top-notch drugs involved. :)

-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 848 bytes
Desc: not available
Url : http://lists.kernelnewbies.org/pipermail/kernelnewbies/attachments/20160420/aa02b914/attachment.bin