From patchwork Fri Oct 18 10:42:06 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Antoniu Miclaus X-Patchwork-Id: 13841568 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 1AD5020127A; Fri, 18 Oct 2024 10:43:16 +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=1729248199; cv=none; b=YDNiBaIzgDAhYNL7OV/9K9QLLH+pE0fi5pHq0pN8lOMzQm8QUsiz/DUHhoPHnfm//5EW5gPi7okWnIvpnx7lOC7kJmDtkTltWYvQcZ1TpQlA2DA7e+BudfskQpwc6bBTR+LAbGC9XwAh4/YLdDGAzTdTTUvBb54SWqVczP2kKiQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729248199; c=relaxed/simple; bh=OSQZqIja1gYa/sGWSyqgT9C8RF/1220OO+zfkoq0gYA=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=bxpVY41qJz0vn748Vb9VSZ4NTvhjtzNo2URQc1+6i0BTa7HSmDxK/SbfASnBO708uPYE2RqiHwbDcithsX1wM90ja5WVfxpRjSCyZMpdu5LOaFYyUDdGTDXBbNvN7ExMsJ9TbEA48L6S8eOVY2VfmBzMwOfr+uZwxV0LUM58NWE= 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=i0JxHTy9; 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="i0JxHTy9" Received: from pps.filterd (m0167088.ppops.net [127.0.0.1]) by mx0a-00128a01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 49IAIONi019455; Fri, 18 Oct 2024 06:43:14 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=analog.com; h=cc :content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=DKIM; bh=NnAHu 0PevN9ovlKbxr2yVS4vt3t1tZWcJhtfc9bV3ak=; b=i0JxHTy9rPMrjyV0mWLx9 3dtjvINMFhhNd2KFZ50ZZVbJ2B1Q5W2K30KrlbcF4+ftjJQUsFRMKjkm10w/m43U OUfJ424w86BhP78xaWmraZDYAaIPYjZDh1XuAX4SWxqpwvO/ttVsGXdU0Wvi8/rt JLE/Vs1RaYfWgeYuHWNOWbd2pKxL4FnrHNuS0xVKJ3mVuZrFxvGYpcr+Q4MXyKQI kK2/iLrXRQMzYw6ahIuPG0v3xkvQ9f64dEFh0Sbi7TjGU1AeVERnkXPWH3hPO+Zv VFnTcc1FoUrw3ni4y8wzFBsgSgqZzOtQYFvhg5646UExH144HiKqxXS5Wgu/Ztml g== Received: from nwd2mta4.analog.com ([137.71.173.58]) by mx0a-00128a01.pphosted.com (PPS) with ESMTPS id 42bckqtg6a-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 18 Oct 2024 06:43:13 -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 49IAhCF6060200 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Fri, 18 Oct 2024 06:43:12 -0400 Received: from ASHBMBX9.ad.analog.com (10.64.17.10) 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; Fri, 18 Oct 2024 06:43:12 -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; Fri, 18 Oct 2024 06:43:12 -0400 Received: from amiclaus-VirtualBox.ad.analog.com (AMICLAUS-L02.ad.analog.com [10.48.65.189]) by zeus.spd.analog.com (8.15.1/8.15.1) with ESMTP id 49IAh2iL028631; Fri, 18 Oct 2024 06:43:08 -0400 From: Antoniu Miclaus To: , , , , , , , , , , CC: Antoniu Miclaus Subject: [PATCH v4 2/6] iio: backend: add support for data size set Date: Fri, 18 Oct 2024 13:42:06 +0300 Message-ID: <20241018104210.51659-2-antoniu.miclaus@analog.com> X-Mailer: git-send-email 2.46.2 In-Reply-To: <20241018104210.51659-1-antoniu.miclaus@analog.com> References: <20241018104210.51659-1-antoniu.miclaus@analog.com> 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-ORIG-GUID: Lc6WMGKO9jEdezW34uBaqGdp-xcWUVR7 X-Proofpoint-GUID: Lc6WMGKO9jEdezW34uBaqGdp-xcWUVR7 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-06_09,2024-09-06_01,2024-09-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 lowpriorityscore=0 suspectscore=0 clxscore=1015 impostorscore=0 mlxlogscore=999 adultscore=0 phishscore=0 priorityscore=1501 malwarescore=0 spamscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2409260000 definitions=main-2410180069 Add backend support for setting the data size used. This setting can be adjusted within the IP cores interfacing devices. Signed-off-by: Antoniu Miclaus --- no changes in v4. drivers/iio/industrialio-backend.c | 21 +++++++++++++++++++++ include/linux/iio/backend.h | 3 +++ 2 files changed, 24 insertions(+) diff --git a/drivers/iio/industrialio-backend.c b/drivers/iio/industrialio-backend.c index ef1fd4cb0b24..2cb97c294ba7 100644 --- a/drivers/iio/industrialio-backend.c +++ b/drivers/iio/industrialio-backend.c @@ -473,6 +473,27 @@ int iio_backend_interface_type_get(struct iio_backend *back, } EXPORT_SYMBOL_NS_GPL(iio_backend_interface_type_get, IIO_BACKEND); +/** + * iio_backend_data_size_set - set the data width/size in the data bus. + * @back: Backend device + * @size: Size in bits + * + * Some frontend devices can dynamically control the word/data size on the + * interface/data bus. Hence, the backend device needs to be aware of it so + * data can be correctly transferred. + * + * Return: + * 0 on success, negative error number on failure. + */ +size_t iio_backend_data_size_set(struct iio_backend *back, size_t size) +{ + if (!size) + return -EINVAL; + + return iio_backend_op_call(back, data_size_set, size); +} +EXPORT_SYMBOL_NS_GPL(iio_backend_data_size_set, IIO_BACKEND); + /** * iio_backend_extend_chan_spec - Extend an IIO channel * @indio_dev: IIO device diff --git a/include/linux/iio/backend.h b/include/linux/iio/backend.h index ad9fa0ada9b2..c2ffb61c5a92 100644 --- a/include/linux/iio/backend.h +++ b/include/linux/iio/backend.h @@ -90,6 +90,7 @@ enum iio_backend_interface_type { * @ext_info_set: Extended info setter. * @ext_info_get: Extended info getter. * @interface_type_get: Interface type. + * @data_size_set: Data size. **/ struct iio_backend_ops { int (*enable)(struct iio_backend *back); @@ -124,6 +125,7 @@ struct iio_backend_ops { const struct iio_chan_spec *chan, char *buf); int (*interface_type_get)(struct iio_backend *back, enum iio_backend_interface_type *type); + int (*data_size_set)(struct iio_backend *back, ssize_t size); }; int iio_backend_chan_enable(struct iio_backend *back, unsigned int chan); @@ -155,6 +157,7 @@ ssize_t iio_backend_ext_info_get(struct iio_dev *indio_dev, uintptr_t private, int iio_backend_interface_type_get(struct iio_backend *back, enum iio_backend_interface_type *type); +size_t iio_backend_data_size_set(struct iio_backend *back, size_t size); int iio_backend_extend_chan_spec(struct iio_dev *indio_dev, struct iio_backend *back, struct iio_chan_spec *chan);