linux-serial.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Greg KH <gregkh@linuxfoundation.org>
To: Hongyu Xie <xiehongyu1@kylinos.cn>
Cc: linux@armlinux.org.uk, jirislaby@kernel.org,
	linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org,
	xy521521@gmail.com
Subject: Re: [RFC PATCH -next] tty: serial: add panic serial helper
Date: Wed, 17 May 2023 13:56:50 +0200	[thread overview]
Message-ID: <2023051759-pushiness-briar-81b7@gregkh> (raw)
In-Reply-To: <20230517101403.232594-1-xiehongyu1@kylinos.cn>

On Wed, May 17, 2023 at 06:14:03PM +0800, Hongyu Xie wrote:
> It works like this:
>     1.Attach the uart side of an USB-to-UART tool to any uart port on your
>     device after panic. Attach the USB side of that tool to another PC.
>     Open minicom(or other app) on that PC, set /dev/ttyUSB0 with
>     "115200 8N1".
> 
>     2.press "Enter", you'll get something like,
> 
>     "
>     wrong password
>     Panic now, please input keyword to debug
>     "
> 
>     3.type "123456" and press "Enter" will prompt a help menu.
>     "
>     help:
>         -a      show all kernel msg
>         -3      show S3 msg
>         -4      show S4 msg
>         -filter-[string]        show msg contains [string]
>         -q-     quit
>     "
> 
>     4.Finally type 'a', '3', '4', 'q' or "filter-xxx" to get what you want.

All of this needs to be documented somewhere, right?

And what is this magic "123456" stuff?

thanks,

greg k-h

  parent reply	other threads:[~2023-05-17 11:56 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-05-17 10:14 [RFC PATCH -next] tty: serial: add panic serial helper Hongyu Xie
2023-05-17 11:54 ` Greg KH
2023-05-17 11:55 ` Greg KH
2023-05-17 11:56 ` Greg KH [this message]
2023-05-17 11:57 ` Greg KH

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=2023051759-pushiness-briar-81b7@gregkh \
    --to=gregkh@linuxfoundation.org \
    --cc=jirislaby@kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-serial@vger.kernel.org \
    --cc=linux@armlinux.org.uk \
    --cc=xiehongyu1@kylinos.cn \
    --cc=xy521521@gmail.com \
    /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).