linux-kernel - Re: [PATCH 00/10] leds: lp5521,5523: restore device attributes for running LED patterns

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAK5ve-JN=xkaiYJU7f-4Kt5edxNU7_L8UMUBEtwXv9p2yPp7qw@mail.gmail.com>
Date:	Tue, 29 Oct 2013 16:17:11 -0700
From:	Bryan Wu <cooloney@...il.com>
To:	Pali Rohár <pali.rohar@...il.com>
Cc:	Milo Kim <woogyom.kim@...il.com>,
	Linux LED Subsystem <linux-leds@...r.kernel.org>,
	lkml <linux-kernel@...r.kernel.org>, Milo Kim <milo.kim@...com>
Subject: Re: [PATCH 00/10] leds: lp5521,5523: restore device attributes for
 running LED patterns

On Fri, Oct 25, 2013 at 11:21 AM, Pali Rohár <pali.rohar@...il.com> wrote:
> On Friday 25 October 2013 19:10:07 Bryan Wu wrote:
>> On Fri, Oct 25, 2013 at 9:38 AM, Pali Rohár
> <pali.rohar@...il.com> wrote:
>> > On Tuesday 13 August 2013 23:04:14 Bryan Wu wrote:
>> >> On Thu, Aug 8, 2013 at 12:59 AM, Milo Kim
> <woogyom.kim@...il.com> wrote:
>> >> > This patch-set resolves the application conflict by
>> >> > restoring sysfs files.
>> >> >
>> >> > For LP5521
>> >> >
>> >> >   engine1/2/3_mode
>> >> >   engine1/2/3_load
>> >> >
>> >> > For LP5523
>> >> >
>> >> >   engine1/2/3_mode
>> >> >   engine1/2/3_load
>> >> >   engine1/2/3_leds
>> >> >
>> >> > Those attributes are accessed when LED pattern is run by
>> >> > custom application. Those were removed when LED pattern
>> >> > interface was changed to generic firmware interface.
>> >> > Please refer to commits below.
>> >> >
>> >> >   git commit 9ce7cb170f97f83a78dc948bf7d25690f15e1328
>> >> >   (leds-lp5521: use generic firmware interface)
>> >> >
>> >> >   git commit db6eaf8388a413a5ee1b4547ce78506b9c6456b0
>> >> >   (leds-lp5523: use generic firmware interface)
>> >> >
>> >> > Necessary attributes are restored in this patch-set.
>> >> >
>> >> > (Other changes)
>> >> > New data structure is added for handling values from/to
>> >> > an application. Few code fixes for reducing writing I2C
>> >> > commands.
>> >> > Add LP55xx common macros for code refactoring.
>> >> > Documentation updates.
>> >> >
>> >> > You can also pull from the location below
>> >> > This branch is based on 'for-next' of linux-leds.
>> >> >
>> >> >   https://github.com/milokim/lp55xx.git
>> >> >   resolve-missing-sysfs
>> >>
>> >> Thanks, I've already merged the whole patchset in my -devel
>> >> branch [1].
>> >>
>> >> Pali, could you please help to test it on your hardware?
>> >> Just grab my -devel branch and build then run.
>> >>
>> >> Thanks,
>> >> -Bryan
>> >
>> > Hi, I see that all your patches are part of 3.12-rc5 kernel.
>> >
>> > Now I tested this example led program:
>> >     # Clearing LED-state to be sure
>> >     echo "disabled" >
>> >     /sys/class/i2c-adapter/i2c-2/2-0032/engine1_mode echo
>> >     "disabled" >
>> >     /sys/class/i2c-adapter/i2c-2/2-0032/engine2_mode echo 0
>> >     > /sys/class/leds/lp5523:r/brightness
>> >     echo 0 > /sys/class/leds/lp5523:g/brightness
>> >     echo 0 > /sys/class/leds/lp5523:b/brightness
>> >
>> >     # Setting yellow light pattern and running it
>> >     echo "load" >
>> >     /sys/class/i2c-adapter/i2c-2/2-0032/engine1_mode echo
>> >     "000001100" >
>> >     /sys/class/i2c-adapter/i2c-2/2-0032/engine1_leds echo
>> >     "9d804000427f0d7f7f007f0042000000" >
>> >     /sys/class/i2c-adapter/i2c-2/2-0032/engine1_load echo
>> >     "load" >
>> >     /sys/class/i2c-adapter/i2c-2/2-0032/engine2_mode echo
>> >     "000000000" >
>> >     /sys/class/i2c-adapter/i2c-2/2-0032/engine2_leds echo
>> >     "9d800000" >
>> >     /sys/class/i2c-adapter/i2c-2/2-0032/engine2_load echo
>> >     "run" >
>> >     /sys/class/i2c-adapter/i2c-2/2-0032/engine2_mode echo
>> >     "run" >
>> >     /sys/class/i2c-adapter/i2c-2/2-0032/engine1_mode echo
>> >     20 > /sys/class/leds/lp5523:r/led_current
>> >     echo 2 > /sys/class/leds/lp5523:g/led_current
>> >     echo 0 > /sys/class/leds/lp5523:b/led_current
>> >
>> > All sysfs entries exists and every echo returned 0.
>> >
>> > But led does not start blinking that yellow ligh pattern.
>> > So it not working on 3.12-rc5 kernel :-(
>>
>> OK, great! Do you still remember which kernel version works on
>> you system? Milo, do you have time to take a look? I bet it's
>> a regression somewhere.
>>
>> Thanks,
>> -Bryan
>
> I do not know which version. Now I tried pattern example from
> Documentation/leds/leds-lp55xx.txt which using new API.
>
> echo 2 > /sys/class/i2c-adapter/i2c-2/2-0032/select_engine
> echo 1 > /sys/class/firmware/lp5523/loading
> echo "9d80400004ff05ff437f0000" > /sys/class/firmware/lp5523/data
> echo 0 > /sys/class/firmware/lp5523/loading
> echo 1 > /sys/class/i2c-adapter/i2c-2/2-0032/run_engine
>
> But it failed at second command. In directory /sys/class/firmware/
> I have only one file with name timeout. Nothing more, no lp5523
> folder.
>
> Any idea who and when creating that lp5523 folder?

Milo,

Do you have time to take a look at this?

Thanks,
-Bryan
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/