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Re: [PATCH v7] serial: support for 16550A serial ports on LP-8x4x

From One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>
Newsgroups linux.kernel
Subject Re: [PATCH v7] serial: support for 16550A serial ports on LP-8x4x
Date 2016-03-01 19:50 +0100
Message-ID <r7XwS-4vn-13@gated-at.bofh.it> (permalink)
References (2 earlier) <r7QlI-8lK-19@gated-at.bofh.it> <r7Vln-34G-3@gated-at.bofh.it> <r7VEL-3d6-21@gated-at.bofh.it> <r7W7M-3DI-21@gated-at.bofh.it> <r7WAO-3OJ-5@gated-at.bofh.it>
Organization Intel Corporation

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> Maybe you just set a baud rate nearest to the one from the table in
> case of BOTHER?

This is broken. BOTHER can be set with a perfectly valid baud rate that
could equally be represented by B9600 say.

If you are stuck with limited ranges then

	switch(baud) {
	case 9600:
	case 4800:

etc

and don't worry about BOTHER, it's entirely transparent to you. The core
kernel code will provide you with a baud rate number, the re-encoder will
always do the right thing.

A driver should never care about BOTHER or any of the baud bits in the
termios structure directly.

Alan

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Thread

[PATCH v6] serial: support for 16550A serial ports on LP-8x4x Sergei Ianovich <ynvich@gmail.com> - 2016-02-27 17:20 +0100
  Re: [PATCH v6] serial: support for 16550A serial ports on LP-8x4x Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2016-02-29 11:30 +0100
    Re: [PATCH v6] serial: support for 16550A serial ports on LP-8x4x Sergei Ianovich <ynvich@gmail.com> - 2016-02-29 14:10 +0100
      Re: [PATCH v6] serial: support for 16550A serial ports on LP-8x4x One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk> - 2016-02-29 15:50 +0100
  [PATCH v7] serial: support for 16550A serial ports on LP-8x4x Sergei Ianovich <ynvich@gmail.com> - 2016-02-29 22:30 +0100
    Re: [PATCH v7] serial: support for 16550A serial ports on LP-8x4x Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2016-03-01 12:10 +0100
      Re: [PATCH v7] serial: support for 16550A serial ports on LP-8x4x Sergei Ianovich <ynvich@gmail.com> - 2016-03-01 17:30 +0100
        Re: [PATCH v7] serial: support for 16550A serial ports on LP-8x4x Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2016-03-01 17:50 +0100
          Re: [PATCH v7] serial: support for 16550A serial ports on LP-8x4x Sergei Ianovich <ynvich@gmail.com> - 2016-03-01 18:20 +0100
            Re: [PATCH v7] serial: support for 16550A serial ports on LP-8x4x Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2016-03-01 18:50 +0100
              Re: [PATCH v7] serial: support for 16550A serial ports on LP-8x4x One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk> - 2016-03-01 19:50 +0100
              Re: [PATCH v7] serial: support for 16550A serial ports on LP-8x4x Sergei Ianovich <ynvich@gmail.com> - 2016-03-01 20:30 +0100
                Re: [PATCH v7] serial: support for 16550A serial ports on LP-8x4x One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk> - 2016-03-01 21:00 +0100
    [PATCH v8] serial: support for 16550A serial ports on LP-8x4x Sergei Ianovich <ynvich@gmail.com> - 2016-03-01 21:00 +0100
      [PATCH v9] serial: support for 16550A serial ports on LP-8x4x Sergei Ianovich <ynvich@gmail.com> - 2016-03-01 21:10 +0100
        Re: [PATCH v9] serial: support for 16550A serial ports on LP-8x4x Andy Shevchenko <andy.shevchenko@gmail.com> - 2016-03-01 21:30 +0100
        [PATCH v10] serial: support for 16550A serial ports on LP-8x4x Sergei Ianovich <ynvich@gmail.com> - 2016-03-01 22:30 +0100

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