From: Pavel Machek <pavel@ucw.cz>
To: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
"Jacek Anaszewski" <jacek.anaszewski@gmail.com>,
LKML <linux-kernel@vger.kernel.org>,
linux-leds@vger.kernel.org, devicetree@vger.kernel.org,
linux-can@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: [PATCH 4/4] leds: netdev trigger: allow setting initial values in device tree
Date: Sun, 17 Mar 2019 20:11:50 +0100 [thread overview]
Message-ID: <20190317191150.GA31285@amd> (raw)
In-Reply-To: <2cd9c42c-1056-979f-568e-c7e387bf90c6@rasmusvillemoes.dk>
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On Thu 2019-03-14 14:19:42, Rasmus Villemoes wrote:
> On 14/03/2019 13.00, Pavel Machek wrote:
> linux,default-trigger from
> >
> > Yeah and now insert the modules for the can devices in different
> > order... May not happen in your case but will be fairly common for
> > ethernets.
>
> Unpredictable device names is not a problem I'm trying to solve, nor one
> that actually occurs on embedded systems. And even if one has such a
> system, one is likely running udev or similar to rename devices to
> something sane and predictable, in which case a fixed string _still_
> works fine. Or one uses udev rules to munge the netdev trigger sysfs
> files, and has applications dealing with devices appearing as banana457.
>
> OK, so there's of_find_net_device_by_node, so a phandle solution might
> also be possible, and might work just as well for my case. But I still
> think initializing with a fixed string is the simplest and sanest thing
> to do.
Simplest, yes. Mergeable, no. Sorry.
Udev will not help with renaming -- it runs after kernel boot, while
udev parsing is usually done before userland starts.
Plus, device tree should really describe hardware, and be usable with
other operating systems. Of course, there are exceptions, but "can0"
is unneccessarily linux-specific.
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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next prev parent reply other threads:[~2019-03-17 19:11 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-11 10:59 replacement for CAN_LEDS Rasmus Villemoes
2019-03-11 14:42 ` Pavel Machek
2019-03-13 20:26 ` [PATCH 0/4] leds: netdev trigger: allow setting initial values in device tree Rasmus Villemoes
2019-03-13 20:26 ` [PATCH 1/4] leds: netdev trigger: use memcpy in device_name_store Rasmus Villemoes
2019-03-14 9:29 ` Uwe Kleine-König
2019-03-14 9:57 ` Rasmus Villemoes
2019-03-14 10:04 ` Uwe Kleine-König
2019-03-14 10:14 ` Pavel Machek
2019-03-14 10:54 ` Rasmus Villemoes
2019-03-14 12:16 ` Pavel Machek
2019-03-13 20:26 ` [PATCH 2/4] leds: netdev trigger: factor out middle part of device_name_store Rasmus Villemoes
2019-03-14 9:31 ` Uwe Kleine-König
2019-03-14 9:57 ` Rasmus Villemoes
2019-03-14 10:15 ` Pavel Machek
2019-03-14 10:20 ` Uwe Kleine-König
2019-03-13 20:26 ` [PATCH 3/4] leds: netdev trigger: add documentation to leds/common.txt Rasmus Villemoes
2019-03-13 20:26 ` [PATCH 4/4] leds: netdev trigger: allow setting initial values in device tree Rasmus Villemoes
2019-03-14 9:36 ` Uwe Kleine-König
2019-03-14 10:28 ` Rasmus Villemoes
2019-03-14 10:29 ` Pavel Machek
2019-03-14 11:26 ` Rasmus Villemoes
2019-03-14 12:00 ` Pavel Machek
2019-03-14 13:19 ` Rasmus Villemoes
2019-03-17 19:11 ` Pavel Machek [this message]
2019-03-24 20:39 ` Rasmus Villemoes
2019-03-14 10:32 ` Jacek Anaszewski
2019-03-14 14:06 ` [PATCH v2 0/6] " Rasmus Villemoes
2019-03-14 14:06 ` [PATCH v2 1/6] leds: netdev trigger: use memcpy in device_name_store Rasmus Villemoes
2019-03-18 11:20 ` Pavel Machek
2019-03-26 19:53 ` Jacek Anaszewski
2019-03-27 15:26 ` Rasmus Villemoes
2019-03-27 21:20 ` Jacek Anaszewski
2019-03-27 21:31 ` Rasmus Villemoes
2019-03-27 21:45 ` Jacek Anaszewski
2019-03-14 14:06 ` [PATCH v2 2/6] leds: netdev trigger: factor out middle part of device_name_store Rasmus Villemoes
2019-03-18 11:24 ` Pavel Machek
2019-03-14 14:06 ` [PATCH v2 3/6] leds: netdev trigger: move newline handling back to device_name_store Rasmus Villemoes
2019-03-18 11:25 ` Pavel Machek
2019-03-14 14:06 ` [PATCH v2 4/6] leds: netdev trigger: move name length checking to netdev_trig_set_device Rasmus Villemoes
2019-03-18 11:26 ` Pavel Machek
2019-03-14 14:06 ` [PATCH v2 5/6] leds: netdev trigger: add documentation to leds/common.txt Rasmus Villemoes
2019-03-14 14:06 ` [PATCH v2 6/6] leds: netdev trigger: allow setting initial values in device tree Rasmus Villemoes
2019-03-14 14:24 ` Jacek Anaszewski
2019-03-14 15:05 ` Rasmus Villemoes
2019-03-14 15:36 ` Jacek Anaszewski
2019-03-18 11:54 ` Pavel Machek
2019-03-28 16:28 ` Rob Herring
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