From patchwork Thu Mar 27 21:24:14 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marcelo Schmitt X-Patchwork-Id: 14031471 Received: from mx0a-00128a01.pphosted.com (mx0a-00128a01.pphosted.com [148.163.135.77]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D3E48199FD0; Thu, 27 Mar 2025 21:25:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.163.135.77 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743110707; cv=none; b=S/dSaIolvUoee1pc3Tqc4gwo7VQZu3k1RCbVhDN+/5H4YHrLnnptKQQXA/6WVASAWa5EbnmbG7bysJZHPgs83Ig9gq2nQFLorpC5BU583EwtcOnAM8Y1nMcsrBrrwLieHLY5yQBFXCHjSJu8UDxco41EMPPu6Ctoe61R6grsiW4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743110707; c=relaxed/simple; bh=VTxI0AIyVxlnmbS9rWrfz2ocmSpb/apVDsKoGwuHfiE=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=PfH+tMuLlG+V6g7uzIlGOdSMDLOc0UHa18W15mrk+yO0nPmJu1E3xI3DSi4TYLcfZ/DrKqk3dE29ZWajzGCnf+84iBM9YGmXIeHT3lobwIFBWkIXPCCFg7cV5EP48MlGQ6tZDIgoemSHeNChVmOWITXWe6/C4D8nVPL8Y/xlV18= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=analog.com; spf=pass smtp.mailfrom=analog.com; dkim=pass (2048-bit key) header.d=analog.com header.i=@analog.com header.b=VdoN7jf/; arc=none smtp.client-ip=148.163.135.77 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=analog.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=analog.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=analog.com header.i=@analog.com header.b="VdoN7jf/" Received: from pps.filterd (m0167089.ppops.net [127.0.0.1]) by mx0a-00128a01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 52RHXeh5023412; Thu, 27 Mar 2025 17:24:33 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=analog.com; h=cc :content-transfer-encoding:content-type:date:from:message-id :mime-version:subject:to; s=DKIM; bh=oDovE7mI8Vww64iMfagGyRyK5fZ AXAUaWJQg4qr3r64=; b=VdoN7jf/FLekDSHjHKy29+71bzhs8kD/yzb3b+ojSK6 T6ibnZBR6tTqD5wxQ7OJg+OhEtXKTLTg3CcVKX5+MEgmqR1uBMgDh7PLbuQ4O58G XP2fPL2ZU26tXLrk0Geh3NYF3ru4X08PAMuVS5iEIAl4a8ejqP0PvQI1ysr2lgUu spS6qwtwl25z2iF114xEWijIAaQUbbTjh0+ttQhrHH+eZOqWJUHjrdCM/9o5jSy/ XBmxiVpy5QnT2rA4Kx5TYvBVMsj1uLCtb7NrbEbO0NfFHqfnoyPV16+dpgn7C+/z /u+WoL6+d7NdZMyUiTsmXl9A0UamHTcOR+XO4OxBQYw== Received: from nwd2mta4.analog.com ([137.71.173.58]) by mx0a-00128a01.pphosted.com (PPS) with ESMTPS id 45krwhg275-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 27 Mar 2025 17:24:32 -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 52RLOV2o047366 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 27 Mar 2025 17:24:31 -0400 Received: from ASHBMBX8.ad.analog.com (10.64.17.5) 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; Thu, 27 Mar 2025 17:24:31 -0400 Received: from zeus.spd.analog.com (10.66.68.11) by ashbmbx8.ad.analog.com (10.64.17.5) with Microsoft SMTP Server id 15.2.986.14 via Frontend Transport; Thu, 27 Mar 2025 17:24:31 -0400 Received: from work.ad.analog.com (HYB-hERzalRezfV.ad.analog.com [10.65.205.9]) by zeus.spd.analog.com (8.15.1/8.15.1) with ESMTP id 52RLOIJ8022509; Thu, 27 Mar 2025 17:24:21 -0400 From: Marcelo Schmitt To: , , CC: , , , , , Subject: [PATCH v4 0/4] iio: adc: ad4000: Add SPI offload support Date: Thu, 27 Mar 2025 18:24:14 -0300 Message-ID: X-Mailer: git-send-email 2.39.2 Precedence: bulk X-Mailing-List: linux-iio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-GUID: iO7EA_tYjWPA1I1Kkr7Rhj3RptZ3Q_Ky X-Proofpoint-ORIG-GUID: iO7EA_tYjWPA1I1Kkr7Rhj3RptZ3Q_Ky X-Authority-Analysis: v=2.4 cv=IuAecK/g c=1 sm=1 tr=0 ts=67e5c210 cx=c_pps a=3WNzaoukacrqR9RwcOSAdA==:117 a=3WNzaoukacrqR9RwcOSAdA==:17 a=Vs1iUdzkB0EA:10 a=VwQbUJbxAAAA:8 a=gAnH3GRIAAAA:8 a=jY0B12Pf-14_IDfJoVoA:9 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1095,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-03-27_04,2025-03-27_02,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 malwarescore=0 impostorscore=0 clxscore=1015 lowpriorityscore=0 priorityscore=1501 phishscore=0 spamscore=0 adultscore=0 bulkscore=0 mlxlogscore=999 mlxscore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2502280000 definitions=main-2503270144 This patch series extends the ad4000 driver to support SPI offloading. In addition to that, ad4000 IIO documentation is expanded to: - list PulSAR parts supported by the ad4000 driver. - describe some characteristics of AD4000 IIO device. - describe changes when SPI offload is being used. Change log v3 -> v4 [IIO driver] - No longer changing spi_device CS timing parameters. - SPI offload messages now set only one transfer. - Degraded offload_xfers from array to single entry field. - Adjusted ad4000_spi_offload_setup() comment. - Dropped t_quiet1_ns since it's not used anymore. - Fixed include order. - Fixed typo: withouth -> without. [Documentation] - Picked up review tags. - Made phrase about SPI offload engine more generic. - Complemented SPI offload section with supported wiring configurations. Change log v2 -> v3 - Dropped patch 1 of v2 series and reverted buffer endianness and SPI transfer bits_per_word configurations to the way they were in v1. - Removed dummy transfer in ad4000_prepare_offload_turbo_message(). - Unified offload message preparation. - Removed spi->cs_hold.value to use cs_inactive to set CNV/CS high time. - Adjusted max sample rate for AD7983 and AD7984. - Dropped AD4000_TCONV_NS and made all time related constants a time_spec field. - Removed _offl param from _CHANNELS() macros and added a comment about that. - Commented IIO_BE check in ad4000_prepare_3wire_mode_message(). - Now using predisable to balance with postenable. - Put spi/offload/consumer.h include right after spi/spi.h. - Removed unrelated brackets in info_mask_separate_available assignment - Added blank line after if. Change log v1 -> v2 - Fixed passing inappropriate pointer instead of ret to dev_err_probe() - [new patch] Set transfer bits_per_word to have data in CPU endianness - Set iio_dev num_channels close to where channels is set. - Complement offload message comment about first sample being invalid - Document why the first buffer sample is invalid when offloading - Added blank line before a 'simple return'. Link to v3: https://lore.kernel.org/linux-iio/cover.1742992305.git.marcelo.schmitt@analog.com/ Link to v2: https://lore.kernel.org/linux-iio/cover.1742394806.git.marcelo.schmitt@analog.com/ Link to v1: https://lore.kernel.org/linux-iio/cover.1741970538.git.marcelo.schmitt@analog.com/ Marcelo Schmitt (4): iio: adc: ad4000: Add support for SPI offload Documentation: iio: ad4000: Add new supported parts Documentation: iio: ad4000: Add IIO Device characteristics section Documentation: iio: ad4000: Describe offload support Documentation/iio/ad4000.rst | 91 ++++++++- drivers/iio/adc/Kconfig | 7 +- drivers/iio/adc/ad4000.c | 382 +++++++++++++++++++++++++++++++---- 3 files changed, 444 insertions(+), 36 deletions(-) base-commit: 9f36acefb2621d980734a5bb7d74e0e24e0af166 prerequisite-patch-id: 3d517eef53a799adba5922815fe684b913e36773