From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 96D1EC35242 for ; Fri, 24 Jan 2020 23:18:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6489B2072C for ; Fri, 24 Jan 2020 23:18:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729447AbgAXXS3 (ORCPT ); Fri, 24 Jan 2020 18:18:29 -0500 Received: from jabberwock.ucw.cz ([46.255.230.98]:55972 "EHLO jabberwock.ucw.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729147AbgAXXS3 (ORCPT ); Fri, 24 Jan 2020 18:18:29 -0500 Received: by jabberwock.ucw.cz (Postfix, from userid 1017) id 726031C2649; Sat, 25 Jan 2020 00:18:27 +0100 (CET) Date: Sat, 25 Jan 2020 00:18:26 +0100 From: Pavel Machek To: Greg Kroah-Hartman Cc: linux-kernel@vger.kernel.org, stable@vger.kernel.org, Jean-Jacques Hiblot Subject: Re: [PATCH 4.19 014/639] leds: tlc591xx: update the maximum brightness Message-ID: <20200124231826.GA14064@duo.ucw.cz> References: <20200124093047.008739095@linuxfoundation.org> <20200124093048.912391801@linuxfoundation.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="/9DWx/yDrRhgMJTb" Content-Disposition: inline In-Reply-To: <20200124093048.912391801@linuxfoundation.org> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --/9DWx/yDrRhgMJTb Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri 2020-01-24 10:23:04, Greg Kroah-Hartman wrote: > From: Jean-Jacques Hiblot >=20 > commit a2cafdfd8cf5ad8adda6c0ce44a59f46431edf02 upstream. >=20 > The TLC chips actually offer 257 levels: > - 0: led OFF > - 1-255: Led dimmed is using a PWM. The duty cycle range from 0.4% to 99.= 6% > - 256: led fully ON >=20 > Fixes: e370d010a5fe ("leds: tlc591xx: Driver for the TI 8/16 Channel i2c = LED driver") > Signed-off-by: Jean-Jacques Hiblot > Signed-off-by: Pavel Machek > Signed-off-by: Greg Kroah-Hartman Its a new feature, really and quite unusual one: 257 brightness levels is not usual. It is theoretically safe, but... Lets not do that for -stable. (I'm a LED maintainer). Best regards, Pavel --=20 (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blo= g.html --/9DWx/yDrRhgMJTb Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iF0EABECAB0WIQRPfPO7r0eAhk010v0w5/Bqldv68gUCXit7QgAKCRAw5/Bqldv6 8ki/AKCJG1IveuDvrfFS2CnZKCLi5ofS/QCfTHm9MDcAhsLv72qfMzpQMxgsEG8= =iayr -----END PGP SIGNATURE----- --/9DWx/yDrRhgMJTb--