From: "Måns Rullgård" <mans@mansr.com>
To: Johan Hovold <johan@kernel.org>
Cc: "Bjørn Mork" <bjorn@mork.no>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] USB: serial: option: set driver_info for SIM5218 and compatibles
Date: Tue, 19 Mar 2019 12:25:53 +0000 [thread overview]
Message-ID: <yw1x8sxb125q.fsf@mansr.com> (raw)
In-Reply-To: <20190319110819.GB3178@localhost> (Johan Hovold's message of "Tue, 19 Mar 2019 12:08:19 +0100")
Johan Hovold <johan@kernel.org> writes:
> On Tue, Mar 19, 2019 at 10:54:00AM +0000, Måns Rullgård wrote:
>> Johan Hovold <johan@kernel.org> writes:
>
>> >> Regardless, setting the NCTRL flag should be harmless.
>> >
>> > Well, there are devices that depend on getting these requests, at least
>> > for the QMI interface. But we can always revert if anyone complains.
>>
>> The QMI interface doesn't even pretend to be a uart. The other ones do,
>> but there isn't actually any real uart behind them. For instance, it
>> doesn't matter what baud rate one sets.
>
> Sure, but some devices still require "DTR" to be set for the QMI
> interface, so there not being any real uart is no guarantee that there
> is no firmware that expects these calls.
Now I'm thoroughly confused. The QMI interface has a completely
separate driver that creates a network device (if I'm reading the code
correctly).
--
Måns Rullgård
next prev parent reply other threads:[~2019-03-19 12:25 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-26 17:07 [PATCH] USB: serial: option: set driver_info for SIM5218 and compatibles Mans Rullgard
2019-02-27 8:33 ` Johan Hovold
2019-02-27 11:57 ` Måns Rullgård
2019-02-27 13:13 ` Johan Hovold
2019-02-27 14:32 ` Måns Rullgård
2019-03-18 14:32 ` Måns Rullgård
2019-03-19 10:28 ` Johan Hovold
2019-03-19 10:54 ` Måns Rullgård
2019-03-19 11:08 ` Johan Hovold
2019-03-19 12:25 ` Måns Rullgård [this message]
2019-03-19 12:27 ` Johan Hovold
2019-03-19 12:43 ` Johan Hovold
2019-03-19 14:30 ` Dan Williams
2019-03-19 14:35 ` Måns Rullgård
2019-03-19 14:59 ` Bjørn Mork
2019-03-19 16:26 ` Måns Rullgård
2019-03-19 17:15 ` Bjørn Mork
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=yw1x8sxb125q.fsf@mansr.com \
--to=mans@mansr.com \
--cc=bjorn@mork.no \
--cc=gregkh@linuxfoundation.org \
--cc=johan@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-usb@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).