linux-kernel - Re: serial: custom baud rate

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Message-ID: <pcfka2$gie$1@blaine.gmane.org>
Date:   Thu, 3 May 2018 18:27:14 +0000 (UTC)
From:   Grant Edwards <grant.b.edwards@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     linux-serial@...r.kernel.org
Subject: Re: serial: custom baud rate

On 2018-05-03, Muni Sekhar <munisekharrms@...il.com> wrote:

> If I need to set a custom baud rates(e.g. 14400, 128000, 256000), does
> Linux serial framework has any supporting method?

Sure, use the termios2 structure instead of the termios structure:

  #include <linux/termios.h>

  struct termios2 t;

  ioctl(fd, TCGETS2, &t)

  t.c_cflag &= ~CBAUD;
  t.c_cflag |= BOTHER;
  t.c_ispeed = baud;
  t.c_ospeed = baud;

  ioctl(fd, TCSETS2, &t)

[Not all devices/drivers support termios2]

-- 
Grant Edwards               grant.b.edwards        Yow! Are we live or on
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