From: Min Li <min.li.xe@renesas.com>
To: Arnd Bergmann <arnd@kernel.org>
Cc: Derek Kiernan <derek.kiernan@xilinx.com>,
Dragan Cvetic <dragan.cvetic@xilinx.com>,
Arnd Bergmann <arnd@arndb.de>,
gregkh <gregkh@linuxfoundation.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Networking <netdev@vger.kernel.org>,
Richard Cochran <richardcochran@gmail.com>
Subject: RE: [PATCH net-next] misc: Add Renesas Synchronization Management Unit (SMU) support
Date: Tue, 16 Feb 2021 17:10:09 +0000 [thread overview]
Message-ID: <OSBPR01MB47732AFC03DA8A0DDF626706BA879@OSBPR01MB4773.jpnprd01.prod.outlook.com> (raw)
In-Reply-To: <CAK8P3a3k5dAF=X3_NrYAAp5gPJ_uvF3XfmC4rKz0oGTrGRriCw@mail.gmail.com>
> >
> > If I come up with a new file and move all the abstraction code there,
> > does that work?
>
> I think so, but it's more important to figure out a good user space interface
> first. The ioctl interfaces should be written on a higher-level abstraction, to
> ensure they can work with any hardware implementation and are not
> specific to Renesas devices.
>
> Can you describe on an abstract level how a user would use the character
> device, and what they achieve by that?
>
> Arnd
Hi Arnd
This driver is meant to be used by Renesas PTP Clock Manager for
Linux (pcm4l) software for Renesas device only.
About how pcm4l uses the char device, pcm4l will open the device
and do the supported ioctl cmds on the device, simple like that.
At the same time, pcm4l will also open ptp hardware clock device,
which is /dev/ptp[x], to do clock adjustments.
Min
next prev parent reply other threads:[~2021-02-16 17:11 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-11 3:03 [PATCH net-next] misc: Add Renesas Synchronization Management Unit (SMU) support min.li.xe
2021-02-11 5:47 ` kernel test robot
2021-02-11 7:06 ` Greg KH
2021-02-11 12:54 ` Greg KH
2021-02-11 13:29 ` Arnd Bergmann
[not found] ` <OSBPR01MB47732017A97D5C911C4528F0BA8B9@OSBPR01MB4773.jpnprd01.prod.outlook.com>
2021-02-12 9:24 ` Arnd Bergmann
2021-02-12 16:16 ` Min Li
2021-02-12 19:50 ` Arnd Bergmann
2021-02-16 17:10 ` Min Li [this message]
2021-02-16 20:44 ` Arnd Bergmann
2021-02-16 22:14 ` Min Li
2021-02-17 15:56 ` Arnd Bergmann
[not found] ` <OSBPR01MB477394546AE3BC1F186FC0E9BA869@OSBPR01MB4773.jpnprd01.prod.outlook.com>
2021-02-17 21:30 ` Arnd Bergmann
2021-02-17 23:07 ` Jakub Kicinski
2021-02-18 3:28 ` Min Li
2021-02-18 10:50 ` Arnd Bergmann
2021-02-18 16:14 ` Min Li
2021-02-18 23:03 ` FW: " Min Li
2021-02-22 16:21 ` Min Li
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=OSBPR01MB47732AFC03DA8A0DDF626706BA879@OSBPR01MB4773.jpnprd01.prod.outlook.com \
--to=min.li.xe@renesas.com \
--cc=arnd@arndb.de \
--cc=arnd@kernel.org \
--cc=derek.kiernan@xilinx.com \
--cc=dragan.cvetic@xilinx.com \
--cc=gregkh@linuxfoundation.org \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=richardcochran@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).