From patchwork Fri Dec 20 12:01:28 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Antoniu Miclaus X-Patchwork-Id: 13916669 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 F36871BD9E6; Fri, 20 Dec 2024 12:02:06 +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=1734696128; cv=none; b=GqP/qTqdMst2fJf0CE7Ui/p9gvn9WN/rYw3QENkJl3v91zDLsTTLruybWlUPoB+84ZhNgzIctpWlVRisgDwuPKNEMlyvE28bjH4bKTsHlihX0bSYpbQT5LeeE+fvml70Q8MK5B1G5FoVZhEty9ZecHbrc8ti0+JscvHsp2xFdZM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734696128; c=relaxed/simple; bh=e4oEl1y/KNuJI4lWFtOu710KpnLtZwzpwE4t7i759Qo=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=jE2mkiX1L+CIIorI31gigG7h0cqzEx+HpZu+Arq/7HQQrcazYEcTHJbpeRMPCDkLkR3v6c2s5dXAvrPjErEXl8LpsKxYgTqHyW3fueOuC8IaT/WQjo6EoW8aD/pZqF16SGiYaQJcpEDPFejwD0pVer9kDCB7NnkC03gIJQisFhg= 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=iJicjGJs; 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="iJicjGJs" 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 4BK6vISr026727; Fri, 20 Dec 2024 07:02:04 -0500 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=CToHx hkCkYtEE6ZmrPKavzBL7gnOG1B6WCta8btm/Iw=; b=iJicjGJsqJS9KGp/jiHxy jlzIzpcnIXu2I/SenKtcP/qMt9aTOPJdOc7FRivx72+soQ9HsfOxsuoN58EvkzGJ gg4WHEkH0yzSPh/xghBFPypW07atkTM8Jp6rvWS20O93zEDubSIMPX2BA8ItXWEj 55MsVrfoyZ+dyQTHvfmGGSKxEoIvYPZvRL0IHNeNikx4hT6KjTSBBCI7c7Qi55Pb qYV7uOsv2bdz2J03cyrIfacLZycJy3UtUWXKmXlDbf4ra1VwGubT4ip9tD4AjBGG 1hWKYSOzrgUQhWPjqXWxwVZwV+IruiuyeyN3AM7gWzJpx8NBnxlzIK/W/S4e1HYy g== Received: from nwd2mta3.analog.com ([137.71.173.56]) by mx0a-00128a01.pphosted.com (PPS) with ESMTPS id 43mxv0acnb-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 20 Dec 2024 07:02:02 -0500 (EST) Received: from ASHBMBX8.ad.analog.com (ASHBMBX8.ad.analog.com [10.64.17.5]) by nwd2mta3.analog.com (8.14.7/8.14.7) with ESMTP id 4BKC1sTY060593 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Fri, 20 Dec 2024 07:01:54 -0500 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; Fri, 20 Dec 2024 07:01:54 -0500 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; Fri, 20 Dec 2024 07:01:54 -0500 Received: from amiclaus-VirtualBox.ad.analog.com (AMICLAUS-L02.ad.analog.com [10.48.65.133]) by zeus.spd.analog.com (8.15.1/8.15.1) with ESMTP id 4BKC1fDi030363; Fri, 20 Dec 2024 07:01:47 -0500 From: Antoniu Miclaus To: , , , , , , CC: Antoniu Miclaus , David Lechner Subject: [PATCH v9 2/8] iio: backend: add support for data size set Date: Fri, 20 Dec 2024 14:01:28 +0200 Message-ID: <20241220120134.42760-2-antoniu.miclaus@analog.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20241220120134.42760-1-antoniu.miclaus@analog.com> References: <20241220120134.42760-1-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-GUID: -njbtPSRXOp1RMP0X0z-SJ9FKJ49HQGa X-Proofpoint-ORIG-GUID: -njbtPSRXOp1RMP0X0z-SJ9FKJ49HQGa 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 mlxscore=0 lowpriorityscore=0 adultscore=0 malwarescore=0 impostorscore=0 suspectscore=0 clxscore=1015 spamscore=0 priorityscore=1501 phishscore=0 mlxlogscore=999 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2411120000 definitions=main-2412200100 Add backend support for setting the data size used. This setting can be adjusted within the IP cores interfacing devices. Reviewed-by: David Lechner Signed-off-by: Antoniu Miclaus --- no changes in v9. 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 8bf3d570da1b..2088afa7a55c 100644 --- a/drivers/iio/industrialio-backend.c +++ b/drivers/iio/industrialio-backend.c @@ -660,6 +660,27 @@ 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. + */ +int iio_backend_data_size_set(struct iio_backend *back, unsigned int 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 * @back: Backend device diff --git a/include/linux/iio/backend.h b/include/linux/iio/backend.h index a0ea6c29d7ba..9ae861a21472 100644 --- a/include/linux/iio/backend.h +++ b/include/linux/iio/backend.h @@ -95,6 +95,7 @@ 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. * @read_raw: Read a channel attribute from a backend device * @debugfs_print_chan_status: Print channel status into a buffer. * @debugfs_reg_access: Read or write register value of backend. @@ -137,6 +138,7 @@ 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, unsigned int size); int (*read_raw)(struct iio_backend *back, struct iio_chan_spec const *chan, int *val, int *val2, long mask); @@ -197,6 +199,7 @@ ssize_t iio_backend_ext_info_get(struct iio_dev *indio_dev, uintptr_t private, const struct iio_chan_spec *chan, char *buf); int iio_backend_interface_type_get(struct iio_backend *back, enum iio_backend_interface_type *type); +int iio_backend_data_size_set(struct iio_backend *back, unsigned int size); int iio_backend_read_raw(struct iio_backend *back, struct iio_chan_spec const *chan, int *val, int *val2, long mask);