From patchwork Mon Jul 31 08:49:26 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Antoniu Miclaus X-Patchwork-Id: 128489 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:918b:0:b0:3e4:2afc:c1 with SMTP id s11csp1890009vqg; Mon, 31 Jul 2023 02:14:08 -0700 (PDT) X-Google-Smtp-Source: APBJJlH298AklpxxvBwqTCteL8oI6CgAYyzFEZCZq6njxzhYRSiWJ/A2RhTELbdrsMj3tweTzPS5 X-Received: by 2002:a05:620a:248a:b0:767:9a35:73c2 with SMTP id i10-20020a05620a248a00b007679a3573c2mr11957708qkn.54.1690794848059; Mon, 31 Jul 2023 02:14:08 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1690794848; cv=none; d=google.com; s=arc-20160816; b=djXrn8OP/QgdmO3sVl/tu6D+PyknxQxVLh6DMCG6qevL6y+QmArraTHNzlx1HCkGDz 2ImrZc/grwXteYoB9KcqHZU+JgrZNFWW5HdGxRDbQaQyFPeO6g3d5t4qv+dlvOYrFdCB Rjhens7+ydbxcNSmVBOTqAGOGYnhmHQ1Kp55zFdhtKv+6z45chZeTczkG/YeOT1nLMGP 01ERHRX4Qo3HwwXnB67B8LxVlL1KJTjwH7f/Ftm6Gb2zCnwDvZzZB8dPDynTeYhY7o9d uRdp3ruA8v94EL2VYq5vSGwZEAAnPmAi/Fc+SI4YzSt8aiA9HIyLnbK8wm4Y/9g8Ovgj HyAA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :message-id:date:subject:cc:to:from; bh=oAwS9OUvdGpZRriypg49I4hpjhmBDO6m4WJkBrVtJS0=; fh=HabWJFzVcNYyYtiXZVpYupAsiak3SIjkcQ0UETgCRVQ=; b=zYlstEhAYcKhvVbSdY7q/Oq25XUfh2bAqaNK+uhyBksLQ+3hcIoSJfSEteNlOP5ckn eUsFFSPQZAQ397eDrYlmQxRXVCpvp73M/A47MXTSIDje4qKorMQ7qmnNDRopLrTLuqUp U5foDXBvSEi4BIkjfl+b6npSsI1cgeDlfmcyvhuQqKiMP9AYYLAxX8KOBWbyG00Ra+cI O/nCQHJ+GtBJG/PBKKUCYnkeu++q7FeOL5grKuiZ2VJcRI6iESIIEQfZVmRuj6Ea05Ap JLZgMZo9U9xPz9TvFjtdjfR1qow7xuKvuMU3rTDxyNQn9irobzoRCEAYj2kCsofKAQXL Qccg== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=analog.com Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id s17-20020a632c11000000b005637962e15esi6605519pgs.603.2023.07.31.02.13.55; Mon, 31 Jul 2023 02:14:08 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=analog.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230229AbjGaIxl (ORCPT + 99 others); Mon, 31 Jul 2023 04:53:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58790 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230154AbjGaIwr (ORCPT ); Mon, 31 Jul 2023 04:52:47 -0400 Received: from mx0a-00128a01.pphosted.com (mx0a-00128a01.pphosted.com [148.163.135.77]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0D699B1; Mon, 31 Jul 2023 01:50:52 -0700 (PDT) Received: from pps.filterd (m0167089.ppops.net [127.0.0.1]) by mx0a-00128a01.pphosted.com (8.17.1.22/8.17.1.22) with ESMTP id 36V7uMcG020034; Mon, 31 Jul 2023 04:50:50 -0400 Received: from nwd2mta4.analog.com ([137.71.173.58]) by mx0a-00128a01.pphosted.com (PPS) with ESMTPS id 3s66qmsemh-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 31 Jul 2023 04:50:45 -0400 (EDT) Received: from ASHBMBX8.ad.analog.com (ASHBMBX8.ad.analog.com [10.64.17.5]) by nwd2mta4.analog.com (8.14.7/8.14.7) with ESMTP id 36V8oa9h003465 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 31 Jul 2023 04:50:36 -0400 Received: from ASHBCASHYB5.ad.analog.com (10.64.17.133) by ASHBMBX8.ad.analog.com (10.64.17.5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.14; Mon, 31 Jul 2023 04:50:35 -0400 Received: from ASHBMBX9.ad.analog.com (10.64.17.10) by ASHBCASHYB5.ad.analog.com (10.64.17.133) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.14; Mon, 31 Jul 2023 04:50:35 -0400 Received: from zeus.spd.analog.com (10.66.68.11) by ashbmbx9.ad.analog.com (10.64.17.10) with Microsoft SMTP Server id 15.2.986.14 via Frontend Transport; Mon, 31 Jul 2023 04:50:35 -0400 Received: from amiclaus-VirtualBox.ad.analog.com (AMICLAUS-L02.ad.analog.com [10.48.65.194]) by zeus.spd.analog.com (8.15.1/8.15.1) with ESMTP id 36V8oRSk021400; Mon, 31 Jul 2023 04:50:29 -0400 From: Antoniu Miclaus To: , , CC: Antoniu Miclaus Subject: [PATCH v2 1/2] drivers: iio: filter: admv8818: add bypass mode Date: Mon, 31 Jul 2023 11:49:26 +0300 Message-ID: <20230731084928.8302-1-antoniu.miclaus@analog.com> X-Mailer: git-send-email 2.41.0 MIME-Version: 1.0 X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-GUID: _n5wMm9NFkG1JKCnt6RR194WZdKzk8kq X-Proofpoint-ORIG-GUID: _n5wMm9NFkG1JKCnt6RR194WZdKzk8kq X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-07-31_02,2023-07-26_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 mlxscore=0 adultscore=0 bulkscore=0 priorityscore=1501 clxscore=1015 phishscore=0 impostorscore=0 malwarescore=0 lowpriorityscore=0 spamscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2306200000 definitions=main-2307310079 X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_BLOCKED,SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1772926898750407589 X-GMAIL-MSGID: 1772926898750407589 Add filter bypass mode, which bypasses the low pass filter, high pass filter and disables/unregister the clock rate notifier. Currently a feature like bypassing the filter is not achievable straightforward and not very deductive. The user has to look through the code and call the set_lpf_3db_frequency and set_hpf_3db_frequency iio attributes from the user interface using the corner cases (freq > largest lpf supported by the part, respectively freq < smallest hpf supported by the part). Moreover, in such case of bypassing the filter, the input clock rate change might mess up things so we want to make sure that it is disabled. Also, the feature will help emphasizing the filter behavior, therefore adding it in the userspace will ease the charcaterization of the filter's effects when active/disabled. It was requested by users of the driver to ease the interaction with different configuration modes of the device. Signed-off-by: Antoniu Miclaus --- changes in v2: - improve code readability when setting the filter modes - add more explanations regarding the necessity of this feature in the commit body. drivers/iio/filter/admv8818.c | 65 ++++++++++++++++++++++++++++++----- 1 file changed, 56 insertions(+), 9 deletions(-) diff --git a/drivers/iio/filter/admv8818.c b/drivers/iio/filter/admv8818.c index fe8d46cb7f1d..848baa6e3bbf 100644 --- a/drivers/iio/filter/admv8818.c +++ b/drivers/iio/filter/admv8818.c @@ -78,6 +78,7 @@ enum { enum { ADMV8818_AUTO_MODE, ADMV8818_MANUAL_MODE, + ADMV8818_BYPASS_MODE, }; struct admv8818_state { @@ -114,7 +115,8 @@ static const struct regmap_config admv8818_regmap_config = { static const char * const admv8818_modes[] = { [0] = "auto", - [1] = "manual" + [1] = "manual", + [2] = "bypass" }; static int __admv8818_hpf_select(struct admv8818_state *st, u64 freq) @@ -394,6 +396,36 @@ static int admv8818_reg_access(struct iio_dev *indio_dev, return regmap_write(st->regmap, reg, write_val); } +static int admv8818_filter_bypass(struct admv8818_state *st) +{ + int ret; + + mutex_lock(&st->lock); + + ret = regmap_update_bits(st->regmap, ADMV8818_REG_WR0_SW, + ADMV8818_SW_IN_SET_WR0_MSK | + ADMV8818_SW_IN_WR0_MSK | + ADMV8818_SW_OUT_SET_WR0_MSK | + ADMV8818_SW_OUT_WR0_MSK, + FIELD_PREP(ADMV8818_SW_IN_SET_WR0_MSK, 1) | + FIELD_PREP(ADMV8818_SW_IN_WR0_MSK, 0) | + FIELD_PREP(ADMV8818_SW_OUT_SET_WR0_MSK, 1) | + FIELD_PREP(ADMV8818_SW_OUT_WR0_MSK, 0)); + if (ret) + goto exit; + + ret = regmap_update_bits(st->regmap, ADMV8818_REG_WR0_FILTER, + ADMV8818_HPF_WR0_MSK | + ADMV8818_LPF_WR0_MSK, + FIELD_PREP(ADMV8818_HPF_WR0_MSK, 0) | + FIELD_PREP(ADMV8818_LPF_WR0_MSK, 0)); + +exit: + mutex_unlock(&st->lock); + + return ret; +} + static int admv8818_get_mode(struct iio_dev *indio_dev, const struct iio_chan_spec *chan) { @@ -411,14 +443,22 @@ static int admv8818_set_mode(struct iio_dev *indio_dev, if (!st->clkin) { if (mode == ADMV8818_MANUAL_MODE) - return 0; + goto set_mode; + + if (mode == ADMV8818_BYPASS_MODE) { + ret = admv8818_filter_bypass(st); + if (ret) + return ret; + + goto set_mode; + } return -EINVAL; } switch (mode) { case ADMV8818_AUTO_MODE: - if (!st->filter_mode) + if (st->filter_mode == ADMV8818_AUTO_MODE) return 0; ret = clk_prepare_enable(st->clkin); @@ -434,20 +474,27 @@ static int admv8818_set_mode(struct iio_dev *indio_dev, break; case ADMV8818_MANUAL_MODE: - if (st->filter_mode) - return 0; + case ADMV8818_BYPASS_MODE: + if (st->filter_mode == ADMV8818_AUTO_MODE) { + clk_disable_unprepare(st->clkin); - clk_disable_unprepare(st->clkin); + ret = clk_notifier_unregister(st->clkin, &st->nb); + if (ret) + return ret; + } - ret = clk_notifier_unregister(st->clkin, &st->nb); - if (ret) - return ret; + if (mode == ADMV8818_BYPASS_MODE) { + ret = admv8818_filter_bypass(st); + if (ret) + return ret; + } break; default: return -EINVAL; } +set_mode: st->filter_mode = mode; return ret; From patchwork Mon Jul 31 08:49:27 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Antoniu Miclaus X-Patchwork-Id: 128529 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:918b:0:b0:3e4:2afc:c1 with SMTP id s11csp1903366vqg; Mon, 31 Jul 2023 02:51:18 -0700 (PDT) X-Google-Smtp-Source: APBJJlEmSCYh3jM7QfxGPU6pjHxB7OlchOzuWuuAGLT5gtPiFdFtF+JO5sKzNzhIPfnyO28m2GTA X-Received: by 2002:a05:6a21:498e:b0:12f:dc60:2b9e with SMTP id ax14-20020a056a21498e00b0012fdc602b9emr8742317pzc.48.1690797078092; Mon, 31 Jul 2023 02:51:18 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1690797078; cv=none; d=google.com; s=arc-20160816; b=pLX61O8U24O1x+OorrKRIls0hnmGjxRvlSRaHRjfmpJOM6K8Z19Ry/F2u+nW7ReH7p QipMPDqctCwHCxhx4Bd4WP4+THnchEz3SGwSZG0gmnJkKRhEyA6ZE6vDZMFEwNYABjab QXLCzmRalRjSDY8o9XzOd43o9sJlOxkJog+6+h9/SpalV5zSvIpk89TJrtzN10dfv+pB lL+Mfl3vUSyoBT/ep7ZN+9WeRmUyHWtaghUmdPjglF1OJrQNBepBuAO3ox6hgUZRAtvR m4aNG1AbLB7G0jMnKkfsEc+C8biEl0EE0ezolCSWJa4df2EFwIC9Yfj3vy7hdLskdZwg 4G3Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from; bh=9AfEi+2be8p9QJsFTLGQFdmMfnGToUfQj4hxd7o87PQ=; fh=HabWJFzVcNYyYtiXZVpYupAsiak3SIjkcQ0UETgCRVQ=; b=Yp8FxukQX0T0KMVcd8AWGq6jRtU5jwtAjXkNUVZj4BuQbQUcc+/6IFLHkwQ3lUbuGx c0Ijp0SZho3ndHtUyNmpmlSk0QsBtaYGuHqPK3D0KFJt4FN37bBAiBmgsCcZ1YlC/3Iu RaXqP1urlVvIzHFK/bEpe3gFxCwMCWHZnhgUBCFAwg11WLWo04nHIN3x1h2r9/3/CzN6 zAZSJgUGdfXzZD2FQ0qA+x/AeeiIRw29sYKSoDc1IiLSuPiITh2yRF1Lp2+k9JLbipT4 3RuFJco2QPXQzGP1VIpM8CqjGCnGXkRYyH7ozoPKg5O5E1RKCCBOjFISHuU1Pk0B2nXd wcEg== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=analog.com Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id fa36-20020a056a002d2400b0067bf9a05b45si7025014pfb.110.2023.07.31.02.51.05; Mon, 31 Jul 2023 02:51:18 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=analog.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230114AbjGaIxg (ORCPT + 99 others); Mon, 31 Jul 2023 04:53:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58788 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230141AbjGaIwr (ORCPT ); Mon, 31 Jul 2023 04:52:47 -0400 Received: from mx0a-00128a01.pphosted.com (mx0a-00128a01.pphosted.com [148.163.135.77]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 85A3F8E; Mon, 31 Jul 2023 01:50:51 -0700 (PDT) Received: from pps.filterd (m0167089.ppops.net [127.0.0.1]) by mx0a-00128a01.pphosted.com (8.17.1.22/8.17.1.22) with ESMTP id 36V837oA020055; Mon, 31 Jul 2023 04:50:43 -0400 Received: from nwd2mta4.analog.com ([137.71.173.58]) by mx0a-00128a01.pphosted.com (PPS) with ESMTPS id 3s66qmsen2-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 31 Jul 2023 04:50:41 -0400 (EDT) Received: from ASHBMBX8.ad.analog.com (ASHBMBX8.ad.analog.com [10.64.17.5]) by nwd2mta4.analog.com (8.14.7/8.14.7) with ESMTP id 36V8ocpw003474 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 31 Jul 2023 04:50:38 -0400 Received: from ASHBCASHYB4.ad.analog.com (10.64.17.132) by ASHBMBX8.ad.analog.com (10.64.17.5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.14; Mon, 31 Jul 2023 04:50:37 -0400 Received: from ASHBMBX9.ad.analog.com (10.64.17.10) by ASHBCASHYB4.ad.analog.com (10.64.17.132) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.14; Mon, 31 Jul 2023 04:50:37 -0400 Received: from zeus.spd.analog.com (10.66.68.11) by ashbmbx9.ad.analog.com (10.64.17.10) with Microsoft SMTP Server id 15.2.986.14 via Frontend Transport; Mon, 31 Jul 2023 04:50:37 -0400 Received: from amiclaus-VirtualBox.ad.analog.com (AMICLAUS-L02.ad.analog.com [10.48.65.194]) by zeus.spd.analog.com (8.15.1/8.15.1) with ESMTP id 36V8oRSl021400; Mon, 31 Jul 2023 04:50:32 -0400 From: Antoniu Miclaus To: , , CC: Antoniu Miclaus Subject: [PATCH v2 2/2] Documentation: ABI: testing: admv8818: add bypass Date: Mon, 31 Jul 2023 11:49:27 +0300 Message-ID: <20230731084928.8302-2-antoniu.miclaus@analog.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230731084928.8302-1-antoniu.miclaus@analog.com> References: <20230731084928.8302-1-antoniu.miclaus@analog.com> MIME-Version: 1.0 X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-GUID: vnWQmc6uICb9KM1vSit-j91nRUelVhfq X-Proofpoint-ORIG-GUID: vnWQmc6uICb9KM1vSit-j91nRUelVhfq X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-07-31_02,2023-07-26_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 mlxscore=0 adultscore=0 bulkscore=0 priorityscore=1501 clxscore=1015 phishscore=0 impostorscore=0 malwarescore=0 lowpriorityscore=0 spamscore=0 mlxlogscore=880 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2306200000 definitions=main-2307310079 X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_BLOCKED,SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1772929237190778298 X-GMAIL-MSGID: 1772929237190778298 Add documentation for the use of the bypass filter mode. Signed-off-by: Antoniu Miclaus --- Documentation/ABI/testing/sysfs-bus-iio-filter-admv8818 | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-bus-iio-filter-admv8818 b/Documentation/ABI/testing/sysfs-bus-iio-filter-admv8818 index f6c035752639..31dbb390573f 100644 --- a/Documentation/ABI/testing/sysfs-bus-iio-filter-admv8818 +++ b/Documentation/ABI/testing/sysfs-bus-iio-filter-admv8818 @@ -7,6 +7,8 @@ Description: - auto -> Adjust bandpass filter to track changes in input clock rate. - manual -> disable/unregister the clock rate notifier / input clock tracking. + - bypass -> bypass low pass filter, high pass filter and disable/unregister + the clock rate notifier What: /sys/bus/iio/devices/iio:deviceX/filter_mode KernelVersion: