Netdev Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Heiner Kallweit <hkallweit1@gmail.com>
To: Andrew Lunn <andrew@lunn.ch>, Pavel Machek <pavel@ucw.cz>
Cc: Tony Nguyen <anthony.l.nguyen@intel.com>,
	davem@davemloft.net, kuba@kernel.org,
	Kurt Kanzenbach <kurt@linutronix.de>,
	netdev@vger.kernel.org, sasha.neftin@intel.com,
	vitaly.lifshits@intel.com, vinicius.gomes@intel.com,
	Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
	Dvora Fuxbrumer <dvorax.fuxbrumer@linux.intel.com>,
	"linux-leds@vger.kernel.org" <linux-leds@vger.kernel.org>
Subject: Re: [PATCH net-next 5/5] igc: Export LEDs
Date: Tue, 20 Jul 2021 17:00:06 +0200	[thread overview]
Message-ID: <88d23db8-d2d2-5816-6ba1-3bd80738c398@gmail.com> (raw)
In-Reply-To: <YPTKB0HGEtsydf9/@lunn.ch>

On 19.07.2021 02:40, Andrew Lunn wrote:
>> In general I'm not sure using the LED API provides a benefit here.
>> The brightness attribute is simply misused. Maybe better add
>> a sysfs attribute like led_mode under the netdev sysfs entry?
> 
> I _think_ you can put LED sys files other places than
> /sys/class/led. It should be possible to put them into netdev sysfs
> directory. However you need to consider what affect network name
> spaces have on this and what happens when an interface changes
> namespace.
> 

I checked the LED subsystem and didn't find a way to place the LED
sysfs files in a place other than /sys/class/leds. Maybe Pavel can
comment on whether I just missed something.
To avoid the network namespace issues we could use the PCI device
name in the LED name, but this would be quite unfriendly to the
user.

For r8169 I'm facing a similar challenge like Kurt. Most family
members support three LED's:
- Per LED a mode 0 .. 15 can be set that defines which link speed(s)
  and/or activity is indicated.
- Period and duty cycle for blinking can be controlled, but this
  setting applies to all three LED's.

For testing purposes I created sysfs attributes led0, led1, led2,
period, duty and assigned the attribute group to netdev->sysfs_groups[0].
This works fine and all attributes are under /sys/class/net/<ifname>.
Only drawback is that you need to know which trigger mode is set by
values 0..15. However this can be documented in sysfs attribute
documentation under Documentation/ABI/testing.

For using the LED subsystem and triggers two things would have to be
solved:
- How to deal with network device name changes so that the user still
  can identify that a LED belongs to a certain network device.
- How to properly deal with attributes that are shared by a group of
  LED's?

>      Andrew
> .
> 
Heiner

  reply	other threads:[~2021-07-20 15:33 UTC|newest]

Thread overview: 68+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-16 21:24 [PATCH net-next 0/5][pull request] 1GbE Intel Wired LAN Driver Updates 2021-07-16 Tony Nguyen
2021-07-16 21:24 ` [PATCH net-next 1/5] igc: Add possibility to add flex filter Tony Nguyen
2021-07-16 21:24 ` [PATCH net-next 2/5] igc: Integrate flex filter into ethtool ops Tony Nguyen
2021-07-16 21:24 ` [PATCH net-next 3/5] igc: Allow for Flex Filters to be installed Tony Nguyen
2021-07-16 21:24 ` [PATCH net-next 4/5] igc: Make flex filter more flexible Tony Nguyen
2021-07-16 21:24 ` [PATCH net-next 5/5] igc: Export LEDs Tony Nguyen
2021-07-16 21:56   ` Andrew Lunn
2021-07-18 22:10     ` Heiner Kallweit
2021-07-18 22:33       ` Andrew Lunn
2021-07-19  6:17         ` Kurt Kanzenbach
2021-07-19  9:46           ` Jakub Kicinski
2021-07-19  6:06     ` Kurt Kanzenbach
2021-07-19 13:15       ` Andrew Lunn
2021-07-20  8:54         ` Kurt Kanzenbach
2021-07-21 19:18         ` Marek Behún
2021-07-18 22:19   ` Heiner Kallweit
2021-07-19  0:40     ` Andrew Lunn
2021-07-20 15:00       ` Heiner Kallweit [this message]
2021-07-20 15:42         ` Andrew Lunn
2021-07-20 20:29           ` Heiner Kallweit
2021-07-21 14:35             ` Andrew Lunn
2021-07-21 16:02               ` Heiner Kallweit
2021-07-21 18:23               ` Pavel Machek
2021-07-21 18:25                 ` Pavel Machek
2021-07-21 18:45             ` Marek Behún
2021-07-21 19:50               ` Andrew Lunn
2021-07-21 20:07                 ` Marek Behún
2021-07-21 20:54                   ` Andrew Lunn
2021-07-21 21:31                     ` Marek Behún
2021-07-21 22:45                     ` Pavel Machek
2021-07-22  1:45                       ` Andrew Lunn
2021-07-22  2:19                         ` Marek Behún
2021-07-21 22:34                   ` Pavel Machek
2021-07-22  3:52                   ` Florian Fainelli
2021-07-26 17:42                   ` Jacek Anaszewski
2021-07-26 18:44                     ` Marek Behún
2021-07-26 20:59                     ` Heiner Kallweit
2021-07-27  0:06                       ` Marek Behún
2021-07-27  1:57                         ` Andrew Lunn
2021-07-27  8:15                           ` Michael Walle
2021-07-27 14:56                             ` Marek Behún
2021-07-27 15:03                               ` Michael Walle
2021-07-27 15:24                                 ` Andrew Lunn
2021-07-27 15:28                                 ` Marek Behún
2021-07-27 15:53                                   ` Michael Walle
2021-07-27 16:23                                     ` Andrew Lunn
2021-07-27 16:32                                     ` Marek Behún
2021-07-27 16:42                                       ` Andrew Lunn
2021-07-27 19:42                                       ` Michael Walle
2021-07-28 20:43                                       ` Heiner Kallweit
2021-07-29  6:39                                         ` Kurt Kanzenbach
2021-07-29  8:59                                         ` Marek Behún
2021-07-29 21:54                                           ` Heiner Kallweit
2021-08-10 17:29                                         ` Pavel Machek
2021-08-10 17:55                                           ` Marek Behún
2021-08-10 19:53                                             ` Pavel Machek
2021-08-10 20:53                                               ` Marek Behún
2021-08-17 19:02                                                 ` Pavel Machek
2021-08-25 15:26                                                   ` Marek Behún
2021-08-26 12:45                                                     ` Pavel Machek
2021-08-10 20:46                                           ` Heiner Kallweit
2021-08-10 21:21                                             ` Andrew Lunn
2021-07-27 13:55                           ` Marek Behún
2021-08-10 17:22                             ` Documentation for naming LEDs was " Pavel Machek
2021-07-19 21:48   ` Jesse Brandeburg
2021-07-20 13:31     ` Kurt Kanzenbach
2021-07-17  0:30 ` [PATCH net-next 0/5][pull request] 1GbE Intel Wired LAN Driver Updates 2021-07-16 patchwork-bot+netdevbpf
2021-07-17 17:36   ` Andrew Lunn

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=88d23db8-d2d2-5816-6ba1-3bd80738c398@gmail.com \
    --to=hkallweit1@gmail.com \
    --cc=andrew@lunn.ch \
    --cc=anthony.l.nguyen@intel.com \
    --cc=bigeasy@linutronix.de \
    --cc=davem@davemloft.net \
    --cc=dvorax.fuxbrumer@linux.intel.com \
    --cc=kuba@kernel.org \
    --cc=kurt@linutronix.de \
    --cc=linux-leds@vger.kernel.org \
    --cc=netdev@vger.kernel.org \
    --cc=pavel@ucw.cz \
    --cc=sasha.neftin@intel.com \
    --cc=vinicius.gomes@intel.com \
    --cc=vitaly.lifshits@intel.com \
    --subject='Re: [PATCH net-next 5/5] igc: Export LEDs' \
    /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

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).