From: Ian Pilcher <arequipeno@gmail.com>
To: linux-leds@vger.kernel.org, kernelnewbies@kernelnewbies.org,
linux-kernel@vger.kernel.org
Subject: Re: device_create_file returns 0 but doesn't work
Date: Sun, 01 Sep 2013 23:48:34 -0500 [thread overview]
Message-ID: <522418A2.8030909@gmail.com> (raw)
In-Reply-To: <l00j5e$8b0$1@ger.gmane.org>
On 09/01/2013 06:38 PM, Ian Pilcher wrote:
> I am trying to add an additional sysfs attribute to a device (LED) that
> is created by another driver. (My ultimate goal is to provide a way for
> a userspace application to use the functionality provided by
> led_blink_set, which doesn't currently seem to be possible.)
Turns out it is possible, with the LED timer trigger, so this issue is
now moot.
>
> The kernel module code that sets up all the GPIOs & LEDs in my NAS is
> at:
>
> http://pastebin.com/TJZGww8T
>
> The call to device_create_file is at line 373.
>
> device_create_file is returning 0, but the "foo" attribute is not being
> created. ("find /sys -name '*foo*'" doesn't find anything, so I'm not
> just looking in the wrong place.)
Still rather odd that it doesn't work, however, since ledtrig-timer.c
seems to do pretty much the same thing. Oh well.
--
========================================================================
Ian Pilcher arequipeno@gmail.com
Sometimes there's nothing left to do but crash and burn...or die trying.
========================================================================
prev parent reply other threads:[~2013-09-02 4:48 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-01 23:38 device_create_file returns 0 but doesn't work Ian Pilcher
2013-09-02 4:48 ` Ian Pilcher [this message]
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