From: Saravana Kannan <saravanak@google.com>
To: Andrew Lunn <andrew@lunn.ch>
Cc: Vladimir Oltean <olteanv@gmail.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Linus Walleij <linus.walleij@linaro.org>,
Vivien Didelot <vivien.didelot@gmail.com>,
Florian Fainelli <f.fainelli@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>, Len Brown <lenb@kernel.org>,
Alvin Sipraga <ALSI@bang-olufsen.dk>,
kernel-team@android.com, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org, linux-acpi@vger.kernel.org
Subject: Re: [PATCH v1 1/2] driver core: fw_devlink: Add support for FWNODE_FLAG_BROKEN_PARENT
Date: Thu, 2 Sep 2021 10:58:29 -0700 [thread overview]
Message-ID: <CAGETcx9gTEr6O2u0VwAgowaMynx=bGQpttw6dRHsud-kM0QmKg@mail.gmail.com> (raw)
In-Reply-To: <YTEMs1mMIT/Z0c4H@lunn.ch>
On Thu, Sep 2, 2021 at 10:41 AM Andrew Lunn <andrew@lunn.ch> wrote:
>
> > How would this be avoided? Or are you thinking of some kind of two-level
> > component driver system:
> > - the DSA switch is a component master, with components being its
> > sub-devices such as internal PHYs etc
> > - the DSA switch is also a component of the DSA switch tree
>
> I think you might be missing a level. Think about the automotive
> reference design system you posted the DT for a couple of days
> ago. Don't you have cascaded switches, which are not members of the
> same DSA tree. You might need a component for that whole group of
> switches, above what you suggest here.
>
> Can you nest components? How deep can you nest them?
As far as I know you can nest components.
Also, technically you can make your own lightweight component model
like behaviour using stateful device links or fwnode links (probably
just a simple for loop). Just create a new "dsa_switch_tree" device
and create device links between that and whatever other devices that
need to probe first. And then you'll just have a common
"dsa_switch_tree" driver that probes these types of devices.
I'm waiting for [1] to land before I jump in and clean up the
component model to be more flexible and cleaner by using device links.
The current implementation does a lot of stuff that device links will
take care of for free.
[1] - https://lore.kernel.org/lkml/CAGETcx-mRrqC_sGiBk+wx8RtwjJjXf0KJo+ejU6SweEBiATaLw@mail.gmail.com/
-Saravana
next prev parent reply other threads:[~2021-09-02 17:59 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-26 7:45 [PATCH v1 0/2] Fix rtl8366rb issues with fw_devlink=on Saravana Kannan
2021-08-26 7:45 ` [PATCH v1 1/2] driver core: fw_devlink: Add support for FWNODE_FLAG_BROKEN_PARENT Saravana Kannan
2021-08-26 13:13 ` Andrew Lunn
2021-08-26 19:56 ` Saravana Kannan
2021-08-26 20:53 ` Andrew Lunn
2021-08-26 23:44 ` Saravana Kannan
2021-08-27 1:23 ` Andrew Lunn
2021-08-27 4:02 ` Saravana Kannan
2021-08-27 13:44 ` Andrew Lunn
2021-08-27 18:06 ` Saravana Kannan
2021-08-27 20:11 ` Andrew Lunn
2021-08-27 21:33 ` Saravana Kannan
2021-08-28 17:01 ` Andrew Lunn
2021-08-30 19:03 ` Saravana Kannan
2021-08-31 13:16 ` Andrew Lunn
2021-08-31 19:26 ` Saravana Kannan
2021-08-31 22:05 ` Andrew Lunn
2021-08-31 22:18 ` Saravana Kannan
2021-08-31 23:02 ` Andrew Lunn
2021-08-31 23:18 ` Vladimir Oltean
2021-08-31 23:27 ` Andrew Lunn
2021-09-01 1:28 ` Vladimir Oltean
2021-09-01 1:38 ` Vladimir Oltean
2021-09-01 2:19 ` Saravana Kannan
2021-09-01 9:02 ` Vladimir Oltean
2021-09-01 22:57 ` Saravana Kannan
2021-09-01 2:00 ` Saravana Kannan
2021-09-01 8:46 ` Vladimir Oltean
2021-09-01 22:53 ` Saravana Kannan
2021-09-02 17:41 ` Andrew Lunn
2021-09-02 17:58 ` Saravana Kannan [this message]
2021-09-30 5:33 ` Saravana Kannan
2021-09-30 13:15 ` Andrew Lunn
2021-09-30 13:43 ` Vladimir Oltean
2021-09-30 14:00 ` Andrew Lunn
2021-09-30 17:31 ` Saravana Kannan
2021-09-30 19:38 ` Andrew Lunn
2021-09-30 19:48 ` Saravana Kannan
2021-09-30 20:06 ` Florian Fainelli
2021-09-30 20:14 ` Saravana Kannan
2021-09-30 21:16 ` Florian Fainelli
2021-09-30 20:22 ` Andrew Lunn
2021-09-01 1:46 ` Saravana Kannan
2021-08-31 23:18 ` Andrew Lunn
2021-09-08 18:35 ` Saravana Kannan
2021-09-09 1:39 ` Andrew Lunn
2021-09-09 3:21 ` Saravana Kannan
2021-09-09 10:38 ` Vladimir Oltean
2021-09-09 15:00 ` Andrew Lunn
2021-09-09 16:56 ` Florian Fainelli
2021-08-26 7:45 ` [PATCH v1 2/2] net: dsa: rtl8366rb: Quick fix to work with fw_devlink=on Saravana Kannan
2021-08-26 7:55 ` Greg Kroah-Hartman
2021-08-26 11:25 ` Florian Fainelli
2021-08-26 17:29 ` Saravana Kannan
2021-08-26 11:29 ` Alvin Šipraga
2021-08-26 17:26 ` Saravana Kannan
2021-08-26 18:04 ` Alvin Šipraga
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='CAGETcx9gTEr6O2u0VwAgowaMynx=bGQpttw6dRHsud-kM0QmKg@mail.gmail.com' \
--to=saravanak@google.com \
--cc=ALSI@bang-olufsen.dk \
--cc=andrew@lunn.ch \
--cc=davem@davemloft.net \
--cc=f.fainelli@gmail.com \
--cc=gregkh@linuxfoundation.org \
--cc=kernel-team@android.com \
--cc=kuba@kernel.org \
--cc=lenb@kernel.org \
--cc=linus.walleij@linaro.org \
--cc=linux-acpi@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=olteanv@gmail.com \
--cc=rafael@kernel.org \
--cc=vivien.didelot@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).