From patchwork Fri Sep 25 15:53:25 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marco Felsch X-Patchwork-Id: 11800145 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 12EEE92C for ; Fri, 25 Sep 2020 15:54:03 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D85AF21741 for ; Fri, 25 Sep 2020 15:54:02 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="dGzvNJ1Q" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D85AF21741 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:To:From: Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender :Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=ZXAV1sZsIvD3js3iwg5A0nHHtKSFIop8RorzbcdWbhs=; b=dGzvNJ1Q/393Y7HIh3Z9MRP/pF FjpEwfatnSu7ae9roYZg4+99RHRovF6B+2hiN+OezRFIl8plt6YDVJcX0SfhICVff0Um98N9ULqrF 4bciklK+8BIxXNj2CLINHhpDkFNW2WbgACG18OkZLFgI4dkn120jhkYRplbLw3j9qBKKJbIYZH6ud 6H+41efudDajVr/wEL8RYY1p7ntYN8vjKk0n6Ya1+upQng//vUvHe78rxvwLQH6A/CQ7Q0ClGp35x SobnK2AiDPW3WLqU8y4B1mNFNKTQ5JPzdTXTpcFVfHp2p7eOAsKYx1fiuwHpTykO1kQlbtbG4bMlX 09WMBK8A==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kLq2g-0003OZ-BL; Fri, 25 Sep 2020 15:53:50 +0000 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kLq2b-0003Lv-EF for linux-arm-kernel@lists.infradead.org; Fri, 25 Sep 2020 15:53:46 +0000 Received: from dude02.hi.pengutronix.de ([2001:67c:670:100:1d::28]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1kLq2S-0000oP-Kd; Fri, 25 Sep 2020 17:53:36 +0200 Received: from mfe by dude02.hi.pengutronix.de with local (Exim 4.92) (envelope-from ) id 1kLq2Q-0008QA-SM; Fri, 25 Sep 2020 17:53:34 +0200 From: Marco Felsch To: thierry.reding@gmail.com, u.kleine-koenig@pengutronix.de, lee.jones@linaro.org, shawnguo@kernel.org, s.hauer@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, Anson.Huang@nxp.com, michal.vokac@ysoft.com, l.majewski@majess.pl Subject: [PATCH v2 0/5] PWM i.MX27 fix disabled state for inverted signals Date: Fri, 25 Sep 2020 17:53:25 +0200 Message-Id: <20200925155330.32301-1-m.felsch@pengutronix.de> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::28 X-SA-Exim-Mail-From: mfe@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-arm-kernel@lists.infradead.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200925_115345_518534_64B28A0E X-CRM114-Status: GOOD ( 11.66 ) X-Spam-Score: 0.0 (/) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-pwm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@pengutronix.de Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Hi, this small series fixes the pwm disabled behaviour in case of an inverted pwm signal. The current state is that in such a case the pwm signal goes to 0V which means logical '1' for inverted pwm signals. IMO this is wrong and should be fixed. I've tested my patches on a custom imx6 board which uses the pwm as backlight. Each patch has a dedicated changelog so I skip it here. Comments and testers are welcome :) Regards, Marco Marco Felsch (5): pwm: imx27: enable clock unconditional for register access pwm: imx27: move constant PWMCR register values into probe pwm: imx27: reset the PWM if it is not running pwm: imx27: fix disable state for inverted PWMs pwm: imx27: wait till the duty cycle is applied drivers/pwm/pwm-imx27.c | 166 +++++++++++++++++++++++++++++----------- 1 file changed, 120 insertions(+), 46 deletions(-)