From patchwork Tue Mar 24 13:10:53 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 228900 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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 A12D4C43331 for ; Tue, 24 Mar 2020 13:13:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7ACAD2098B for ; Tue, 24 Mar 2020 13:13:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585055588; bh=JritSytOa17n9A8eCr1IfHZFbdBPS/YBgudn9Ph3Q20=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=DUkB12hjeuB/+7NwBKBc8OGi30MBrwh53HDz0r2aBP8kNNAhiz+Xvpe6GXl1WKR7v tm7JxhY3x1JN18ZVJpABFRPJfGlGraBzZSXgHxFlzA9eoQ5+ld+g4OGBfDTWUItBga eji/z83IDtXMI45FC/EmVHc+CJD3GMwdtFVwBm2I= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727805AbgCXNNG (ORCPT ); Tue, 24 Mar 2020 09:13:06 -0400 Received: from mail.kernel.org ([198.145.29.99]:59162 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727800AbgCXNNF (ORCPT ); Tue, 24 Mar 2020 09:13:05 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id D56C0208CA; Tue, 24 Mar 2020 13:13:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585055585; bh=JritSytOa17n9A8eCr1IfHZFbdBPS/YBgudn9Ph3Q20=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=sHficE/rJ4Yl0oITocJKYeY2EpXyVbqUbJpvBXXhMhqe2qE5MqOTHIujqAAmEBieA 2bCW3dpnSgcA3TZ3d3UqfrHmCRpBqDvNK5tHV028PiKKF+CGJCgk94PI8TSl57h+Kv i/EHNQhutK0z8n39ixvrOlTpnzrIL9mBZ3FhP9Uc= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Fabrice Gasnier , Stable@vger.kernel.org, Jonathan Cameron Subject: [PATCH 4.19 32/65] iio: trigger: stm32-timer: disable master mode when stopping Date: Tue, 24 Mar 2020 14:10:53 +0100 Message-Id: <20200324130801.279417853@linuxfoundation.org> X-Mailer: git-send-email 2.25.2 In-Reply-To: <20200324130756.679112147@linuxfoundation.org> References: <20200324130756.679112147@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Fabrice Gasnier commit 29e8c8253d7d5265f58122c0a7902e26df6c6f61 upstream. Master mode should be disabled when stopping. This mainly impacts possible other use-case after timer has been stopped. Currently, master mode remains set (from start routine). Fixes: 6fb34812c2a2 ("iio: stm32 trigger: Add support for TRGO2 triggers") Signed-off-by: Fabrice Gasnier Cc: Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/iio/trigger/stm32-timer-trigger.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) --- a/drivers/iio/trigger/stm32-timer-trigger.c +++ b/drivers/iio/trigger/stm32-timer-trigger.c @@ -161,7 +161,8 @@ static int stm32_timer_start(struct stm3 return 0; } -static void stm32_timer_stop(struct stm32_timer_trigger *priv) +static void stm32_timer_stop(struct stm32_timer_trigger *priv, + struct iio_trigger *trig) { u32 ccer, cr1; @@ -179,6 +180,12 @@ static void stm32_timer_stop(struct stm3 regmap_write(priv->regmap, TIM_PSC, 0); regmap_write(priv->regmap, TIM_ARR, 0); + /* Force disable master mode */ + if (stm32_timer_is_trgo2_name(trig->name)) + regmap_update_bits(priv->regmap, TIM_CR2, TIM_CR2_MMS2, 0); + else + regmap_update_bits(priv->regmap, TIM_CR2, TIM_CR2_MMS, 0); + /* Make sure that registers are updated */ regmap_update_bits(priv->regmap, TIM_EGR, TIM_EGR_UG, TIM_EGR_UG); } @@ -197,7 +204,7 @@ static ssize_t stm32_tt_store_frequency( return ret; if (freq == 0) { - stm32_timer_stop(priv); + stm32_timer_stop(priv, trig); } else { ret = stm32_timer_start(priv, trig, freq); if (ret)