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=-8.3 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 1EE17C2D0E7 for ; Wed, 1 Apr 2020 08:52:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E692420784 for ; Wed, 1 Apr 2020 08:52:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=st.com header.i=@st.com header.b="FKKmCM/2" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732059AbgDAIwj (ORCPT ); Wed, 1 Apr 2020 04:52:39 -0400 Received: from mx08-00178001.pphosted.com ([91.207.212.93]:58474 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726536AbgDAIwi (ORCPT ); Wed, 1 Apr 2020 04:52:38 -0400 Received: from pps.filterd (m0046661.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 0318mpeP020674; Wed, 1 Apr 2020 10:52:24 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=st.com; h=subject : to : cc : references : from : message-id : date : mime-version : in-reply-to : content-type : content-transfer-encoding; s=STMicroelectronics; bh=r52PE0j1vMBkkUz5Eegf2p3sdm+5DC8eaQV1TiyeLGc=; b=FKKmCM/2e0k3XoRM0JKKuHFS2qqrsvmHjmUccd+uxE4Ew0LCbN9KoV0O1Tj5tVpM3KV+ lNFxoVqXzamJb+sQAVbXSq+hZdZOm89oGFjXbZ8MfQCnmqQnSLr8/DqFBUP+cFwglzKc SPJTxchaIbiSbBRyhyIiSHwnkzzG6K87sG4RiBGw4jhZn6kB5cdjOCwHQTXGxpE+teb4 mDKtb8K+Q78N0SU6eFj+bjiUvQGj/DhC735mYO6WEFoK3NZwL9FCwazdzWd6ke/BSWx5 DWamg2/bzA2cqAK1BIbq07ZDH6uATLWCWzTYsTI38t5Lzv22YwNcYmOGjQUH27IZWOHc HQ== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 301xbmm00j-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 01 Apr 2020 10:52:24 +0200 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 7E61B100039; Wed, 1 Apr 2020 10:52:22 +0200 (CEST) Received: from Webmail-eu.st.com (sfhdag5node3.st.com [10.75.127.15]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 695BA21D6CC; Wed, 1 Apr 2020 10:52:22 +0200 (CEST) Received: from [10.211.14.17] (10.75.127.47) by SFHDAG5NODE3.st.com (10.75.127.15) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Wed, 1 Apr 2020 10:52:21 +0200 Subject: Re: [PATCH v6 4/6] mfd: stm32: enable regmap fast_io for stm32-lptimer To: Benjamin Gaignard , , , , , , , CC: , , , References: <20200401083909.18886-1-benjamin.gaignard@st.com> <20200401083909.18886-5-benjamin.gaignard@st.com> From: Fabrice Gasnier Message-ID: <4ca5f15f-c967-9c84-4a9f-13a11f71a72a@st.com> Date: Wed, 1 Apr 2020 10:52:20 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 MIME-Version: 1.0 In-Reply-To: <20200401083909.18886-5-benjamin.gaignard@st.com> Content-Type: text/plain; charset="utf-8" Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [10.75.127.47] X-ClientProxiedBy: SFHDAG2NODE2.st.com (10.75.127.5) To SFHDAG5NODE3.st.com (10.75.127.15) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.676 definitions=2020-03-31_07:2020-03-31,2020-03-31 signatures=0 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 4/1/20 10:39 AM, Benjamin Gaignard wrote: > Because stm32-lptimer need to write in registers in interrupt context > enable regmap fast_io to use a spin_lock to protect registers access > rather than a mutex. > > Signed-off-by: Benjamin Gaignard > --- > drivers/mfd/stm32-lptimer.c | 1 + > 1 file changed, 1 insertion(+) Hi Benjamin, Acked-by: Fabrice Gasnier Thanks, Fabrice > > diff --git a/drivers/mfd/stm32-lptimer.c b/drivers/mfd/stm32-lptimer.c > index a00f99f36559..746e51a17cc8 100644 > --- a/drivers/mfd/stm32-lptimer.c > +++ b/drivers/mfd/stm32-lptimer.c > @@ -17,6 +17,7 @@ static const struct regmap_config stm32_lptimer_regmap_cfg = { > .val_bits = 32, > .reg_stride = sizeof(u32), > .max_register = STM32_LPTIM_MAX_REGISTER, > + .fast_io = true, > }; > > static int stm32_lptimer_detect_encoder(struct stm32_lptimer *ddata) >