Comments on: LEDs on ALIX.3D3

By: twam

twam — Mon, 21 Mar 2011 21:10:40 +0000

@sel Ja. Er konnte die Änderung nur nicht automatisch machen, weil eben im Patch eine Änderungen an MODUL_PARM_DESC war und in der neuen Kernelversion. Daher fragt er halt.

By: sel

sel — Mon, 21 Mar 2011 21:07:21 +0000

Ok, dann ist der patch doch richtig?
denn ich habe nach dem patchen 3 Datei erhalten:
-leds-alix2.c.orig
-leds-alix2.c
-leds-alix2.c.re (siehe Post 16)

In der Datei “leds-alix2.c” ist, so weit ich das gesehen habe die änderungen vorhanden.
Ich danke dir “twam”

By: twam

twam — Mon, 21 Mar 2011 21:02:05 +0000

@sel Ah, da ist problemlos. Da hat wohl nur jemand die Beschreibung geändert. Übernimmt einfach eine der beiden Zeilen, ist egal welche.

By: sel

sel — Mon, 21 Mar 2011 20:51:12 +0000

bei der Datei leds-alix2.c.re steht nur folgendes drin:
— drivers/leds/leds-alix2.c
+++ drivers/leds/leds-alix2.c
@@ -14,7 +14,7 @@

static int force = 0;
module_param(force, bool, 0444);
-MODULE_PARM_DESC(force, “Assume system has ALIX.2 style LEDs”);
+MODULE_PARM_DESC(force, “Assume system has ALIX.2/ALIX.3 style LEDs (Needed for boards with Award BIOS)”);

struct alix_led {
struct led_classdev cdev;

By: twam

twam — Mon, 21 Mar 2011 20:42:50 +0000

@sel Das heißt das der Patch für die aktuelle Version nicht mehr automatisch funktioniert. Du musst die Datei leds-alix2.c.re bearbeiten. Dort solltest du irgendwo zwischen <<<<>>>>> die Unterschiede zwischen den Versionen sehen. Die musst du von Hand anpassen und es dann als leds-alix2.c speichern.

By: sel

sel — Mon, 21 Mar 2011 20:41:12 +0000

Kernel kompilieren ist für mich noch alles sehr neu. Nun ich versuche mit Debian Squeeze denn auf Kernel.org – linux-2.6.38 zu patchen. Beim Patch kommt dann folgende Meldung:

root@alix3d3:/usr/src/linux# patch -p1 < /root/leds-alix2.patch
patching file drivers/leds/leds-alix2.c
Hunk #1 FAILED at 14.
Hunk #2 succeeded at 213 with fuzz 2 (offset 58 lines).
1 out of 2 hunks FAILED — saving rejects to file drivers/leds/leds-alix2.c.re

Bitte um Hilfe.

By: Antani

Antani — Thu, 10 Mar 2011 22:32:12 +0000

For newer kernel from 2.6.33 : https://patchwork.kernel.org/patch/72006/

By: twam

twam — Thu, 04 Nov 2010 11:59:17 +0000

@peter The patch simply sets all the 3 GPIOs as an output pin.

By: peter

peter — Wed, 03 Nov 2010 23:02:53 +0000

I’m having a similar problem, except I am using OpenBSD. I can initialize the GPIO pins that the 1st and the 3rd LED’s use (pins 6 and 27), but the second LED (on pin 25) is giving me grief. More specifically, as soon as I attempt to initialize it, it causes the OS to crash – no warning, no longs, no dump, just a reboot. Can you explain what your patch fixed, maybe I can try the same with my OS…

By: mykhal

mykhal — Mon, 17 May 2010 23:45:21 +0000

helpful info, thanks. it introduced me into ALIX LEDs..
did you know ide-disk led trigger ? you can have LED blinking in IDE access:

echo ide-disk > /sys/class/leds/”alix:1″/trigger

however, i wanted my leds to blink on disk read/write separately, so i modified the kernel little bit.. more here: http://lkml.org/lkml/2010/5/17/501 (misaligned little bit, my first post there)

By: matt

matt — Wed, 27 Jan 2010 01:00:20 +0000

Twam, I have built a Bike/Bike camera system using the Alix 3d2/3d3 boards. I have found your page very useful in tuning the kernel and solving some of my problems with the 3d3 LEDs. I have created a small script to control the LEDs using the GPIO interface which I would like to share here:

#!/bin/sh
#
# Author: Matt Judge
# Date: 25/01/09
# Script: alix_led
# Desc: Simple wrapper to the Linux GPIO interface for Alix
# system boards.
# Usage: alix_led
# LED: 1, 2 or 3.
# switch: 0=off, 1=on
#
# Permission is granted to copy, publish and implement this script
# for non commercial uses provided all comment fields remain intact.
# No fitness for purpose is implied.
#

# Define the LEDs
leds=(0 6 25 27)

# Make sure we have enough arguments and they fit the patterns
[[ ${leds[${1}]} > 0 ]] || exit
[ ${2:-1} -ne 0 -a ${2:-0} -ne 1 ] && exit

# Get the value out of the array
led=${leds[$1]}

# Make the usage more logical (ie. 0=off, 1=on)
val=$((($2 * -1) + 1))

echo $led > /sys/class/gpio/export
echo out > /sys/class/gpio/GPIO${led}/direction
echo ${val} > /sys/class/gpio/GPIO${led}/value
echo $led > /sys/class/gpio/unexport

By: matt

matt — Thu, 07 Jan 2010 20:35:13 +0000

Thanks for this. Good information.

By: twam

twam — Mon, 14 Sep 2009 00:16:03 +0000

You either need to apply the patch linked in the article or use kernel 2.6.31 (where this patch is included). Award BIOS doesn’t initialize LED 3 correctly. The patch fixes this.

By: ecraven

ecraven — Sun, 13 Sep 2009 18:47:10 +0000

works beautifully, except for the fact that led3 can’t be turned off on my alix 3d3. any way to debug this?

By: twam

twam — Tue, 28 Jul 2009 05:08:09 +0000

To skip hardware detection you must pass the force=1 parameter either by adding leds-alix2.force=1 to your boot line or by

modprobe leds-alix2 forge=1

If this has no success I recommend to update to a recent kernel. Just download the sources from kernel.org, copy your old .config and do an

make oldconfig

After this, you can follow the instructions above.

By: DevHamster

DevHamster — Mon, 27 Jul 2009 18:11:16 +0000

Hi!
Great instruction! Unfortunately it doesn’t work with my Mandriva 2007 Kernel 2.6.17-13mdv on an ALIX 3d3. I already tried your patches and from voyage (with led-support) and I also tried to run the leds via gpioctl. Nothing seems to work. When I started I get the leds-alix source and compiled it. Then I did the kernel-config and make. The problem is that I can’t load the leds-alix into the kernel b’cause some symbols found in Led Class Support (kernel config) are unknown. Now I think that the problem could be caused by hardware detection, but I don’t know how to continue.
Do you have any idea what else I could try? Could it be possible to use this kernel (it has some things I need)?

By: GPIO on ALIX.3D3

GPIO on ALIX.3D3 — Sun, 17 May 2009 13:41:48 +0000

[...] be used as special function GPIO pins. The ALIX.3D3 uses 4 GPIO pins for 3 LEDs and 1 mode switch. Accessing the leds is very easy using the leds-alix2 driver, but they can address as GPIO as well. There is already a [...]

By: twam

twam — Fri, 08 May 2009 19:46:17 +0000

Kernel support for the encryption device is very easy. The problem is that there is no included userspace interface. There are some BSD ports but I haven’t tried them yet, but I’m looking forward to do so.

By: Anders

Anders — Fri, 08 May 2009 18:28:02 +0000

Very informative reading. Im trying to configure the 2.6.29-kernel for Alix too. The hardest part I guess will be to enable the hardware encryption part of the geode processor (will be a perfect match with the openvpn service I have). I would be very happy if you could do a similar tutorial about this