From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:39801 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725925AbfHQPCs (ORCPT ); Sat, 17 Aug 2019 11:02:48 -0400 Date: Sat, 17 Aug 2019 17:02:46 +0200 From: Pavel Machek Subject: Re: [PATCH v4 2/2] leds: add LED driver for EL15203000 board Message-ID: <20190817150246.GB18381@amd> References: <20190808203204.8614-1-oleg@kaa.org.ua> <20190808203204.8614-2-oleg@kaa.org.ua> <260f8b69-3f4a-d911-88f8-d6de59e79bc3@kaa.org.ua> <56fa6881-2af6-71ec-160c-7712075756be@gmail.com> <11f6da3b-860a-2e52-e4fa-2a650fd2407b@kaa.org.ua> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="b5gNqxB1S1yM7hjW" Content-Disposition: inline In-Reply-To: Sender: devicetree-owner@vger.kernel.org To: Oleh Kravchenko Cc: Jacek Anaszewski , devicetree@vger.kernel.org, linux-leds@vger.kernel.org List-ID: --b5gNqxB1S1yM7hjW Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi! > >>>> All pattern is predefined, you can't change them at all. > >>>> I just tried to describe real things what happened in LED board. > >>>> It's ticks every 800 milliseconds for Pipe LEDs. > >>> > >>> It makes me wonder how you figured out the values? If you have > >>> a documentation for this controller, could you share how the pattern > >>> settings are documented? > >> > >> I saw the code of firmware. > >> Not sure if I can find any documentation for it right now. > >=20 > > Have you tried to alter the values? Or check what happens when > > the duplication is removed? >=20 > What do you mean alter? It doesn't make any sense. > Board is accepts only brightness level from '0' to '5'. > I'm really confused :-) For the record, what you did seems ok to me. > >> Ok, I will reduce it. > >=20 > > Please hold on for a while. I will have some more remarks to the driver, > > just collecting missing info for now to gain more complete view on this > > device. >=20 > Here is the full story: >=20 > EL15203000 LEDs board (aka RED LEDs board, because it has only RED LEDs). > It's provide access to 3 LEDs: >=20 > - First LED (Screen) is a light tube around big 21" screen > It's have 3 brightness levels: > * OFF > * ON > * Breathing mode (8 seconds full cycle) > - Second LED (Vending area) is highlight coffee cap > * OFF > * ON Again, this is ok. > - Third LED (Pipe) is actually virtual, because consists from 5 LEDs > * OFF for all 5 LEDs > * ON for all 5 LEDs > * Cascade > * Inverses cascade > * Bounce > * Inverses bounce But having one virtual LED that is really five LEDs scares me a tiny bit. But I guess its ok for your case... Best regards, Pavel --=20 (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blo= g.html --b5gNqxB1S1yM7hjW Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAl1YFxYACgkQMOfwapXb+vJojgCgjqeQrTqIQD6NzrPAmlXw91Ib NDUAn1vnGXxmcF9AFVYZa/CEdp1JtEfg =QGKQ -----END PGP SIGNATURE----- --b5gNqxB1S1yM7hjW--