Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753491AbdIRKHL (ORCPT ); Mon, 18 Sep 2017 06:07:11 -0400 Received: from mx07-00178001.pphosted.com ([62.209.51.94]:10686 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753171AbdIRKGp (ORCPT ); Mon, 18 Sep 2017 06:06:45 -0400 From: Fabrice Gasnier To: CC: , , , , , , , , , , Subject: [PATCH 2/3] iio: trigger: stm32-timer: fix a corner case to write preset Date: Mon, 18 Sep 2017 12:05:31 +0200 Message-ID: <1505729132-1369-3-git-send-email-fabrice.gasnier@st.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1505729132-1369-1-git-send-email-fabrice.gasnier@st.com> References: <1505729132-1369-1-git-send-email-fabrice.gasnier@st.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.75.127.46] X-ClientProxiedBy: SFHDAG7NODE3.st.com (10.75.127.21) To SFHDAG5NODE3.st.com (10.75.127.15) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2017-09-18_02:,, signatures=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 997 Lines: 26 Balance timer start routine that sets ARPE: clear it in stop routine. This fixes a corner case, when timer is used successively as trigger (with sampling_frequency start/stop routines), then as a counter (with preset). Fixes: 93fbe91b5521 ("iio: Add STM32 timer trigger driver") Signed-off-by: Fabrice Gasnier --- drivers/iio/trigger/stm32-timer-trigger.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/iio/trigger/stm32-timer-trigger.c b/drivers/iio/trigger/stm32-timer-trigger.c index 34cc25b..eb212f8c 100644 --- a/drivers/iio/trigger/stm32-timer-trigger.c +++ b/drivers/iio/trigger/stm32-timer-trigger.c @@ -174,6 +174,7 @@ static void stm32_timer_stop(struct stm32_timer_trigger *priv) clk_disable(priv->clk); /* Stop timer */ + regmap_update_bits(priv->regmap, TIM_CR1, TIM_CR1_ARPE, 0); regmap_update_bits(priv->regmap, TIM_CR1, TIM_CR1_CEN, 0); regmap_write(priv->regmap, TIM_PSC, 0); regmap_write(priv->regmap, TIM_ARR, 0); -- 1.9.1