From: Kevin Cernekee <cernekee@gmail.com>
To: Rob Herring <robh@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Jiri Slaby <jslaby@suse.cz>,
Grant Likely <grant.likely@linaro.org>,
Florian Fainelli <f.fainelli@gmail.com>,
Maxime Bizon <mbizon@freebox.fr>, Jonas Gorski <jogo@openwrt.org>,
Linux-MIPS <linux-mips@linux-mips.org>,
"linux-serial@vger.kernel.org" <linux-serial@vger.kernel.org>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
stable@vger.kernel.org
Subject: Re: [PATCH 2/2] tty: serial: bcm63xx: Allow device nodes to be renamed to /dev/ttyBCM*
Date: Mon, 10 Nov 2014 11:50:56 -0800 [thread overview]
Message-ID: <CAJiQ=7C5ki+9opnH68Kw9a573PmO=ANeiVutmVROUP2Typn2qw@mail.gmail.com> (raw)
In-Reply-To: <CAL_JsqLYoUKr71Q-hfLQhXOVL72Gy7PkO-Zd4rBc0Fn-prOqTw@mail.gmail.com>
On Mon, Nov 10, 2014 at 11:22 AM, Rob Herring <robh@kernel.org> wrote:
>>> This can be solved with a udev rule to create sym links.
>>
>> Is it safe to register two console drivers named "ttyS" with the same
>> major/minor numbers? Maybe there is a trick to making them coexist?
>
> No, but I think you can do dynamic minor numbers. I seem to recall
> this coming up with the Samsung UARTs a while back.
The other variations I've seen in the tree are:
nwpserial: ttySQ, major 4 minor 68 (not 64)
sunhv, sunsab, sunsu, sunzilog: set uart_driver->major to 4 but let
uart_driver->minor default to 0
SERIAL_ATMEL_TTYAT: compile-time selectable between ttySn (4/64) and
ttyATn (204/154). txx9 does something similar using
SERIAL_TXX9_STDSERIAL.
A whole bunch of other SoC serial drivers use major 204 and a custom
name like "ttyAL". Some of these show up in
Documentation/devices.txt; others don't. ~3 drivers use 204/64 from
the middle of the Altix assigned range.
What is the current best practice for new drivers?
next prev parent reply other threads:[~2014-11-10 19:50 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-09 8:55 [PATCH 1/2] of: Fix crash if an earlycon driver is not found Kevin Cernekee
2014-11-09 8:55 ` [PATCH 2/2] tty: serial: bcm63xx: Allow device nodes to be renamed to /dev/ttyBCM* Kevin Cernekee
2014-11-10 14:25 ` Rob Herring
2014-11-10 15:05 ` Kevin Cernekee
2014-11-10 18:30 ` Greg Kroah-Hartman
2014-11-10 19:10 ` Kevin Cernekee
2014-11-10 19:22 ` Rob Herring
2014-11-10 19:50 ` Kevin Cernekee [this message]
2014-11-11 17:35 ` Rob Herring
2014-11-11 19:50 ` Kevin Cernekee
2014-11-10 14:14 ` [PATCH 1/2] of: Fix crash if an earlycon driver is not found Rob Herring
2014-11-10 19:01 ` Sergei Shtylyov
2014-11-12 17:12 ` Grant Likely
2014-11-12 17:11 ` Grant Likely
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='CAJiQ=7C5ki+9opnH68Kw9a573PmO=ANeiVutmVROUP2Typn2qw@mail.gmail.com' \
--to=cernekee@gmail.com \
--cc=devicetree@vger.kernel.org \
--cc=f.fainelli@gmail.com \
--cc=grant.likely@linaro.org \
--cc=gregkh@linuxfoundation.org \
--cc=jogo@openwrt.org \
--cc=jslaby@suse.cz \
--cc=linux-mips@linux-mips.org \
--cc=linux-serial@vger.kernel.org \
--cc=mbizon@freebox.fr \
--cc=robh@kernel.org \
--cc=stable@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).