From patchwork Tue Nov 17 16:23:36 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandru Ardelean X-Patchwork-Id: 11912699 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=-14.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 2279DC64E75 for ; Tue, 17 Nov 2020 16:19:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E579120897 for ; Tue, 17 Nov 2020 16:19:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727794AbgKQQS4 (ORCPT ); Tue, 17 Nov 2020 11:18:56 -0500 Received: from mx0a-00128a01.pphosted.com ([148.163.135.77]:23600 "EHLO mx0a-00128a01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727132AbgKQQSy (ORCPT ); Tue, 17 Nov 2020 11:18:54 -0500 Received: from pps.filterd (m0167088.ppops.net [127.0.0.1]) by mx0a-00128a01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 0AHGEV7d001204; Tue, 17 Nov 2020 11:18:42 -0500 Received: from nwd2mta3.analog.com ([137.71.173.56]) by mx0a-00128a01.pphosted.com with ESMTP id 34t9ybjdgp-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 17 Nov 2020 11:18:42 -0500 Received: from ASHBMBX9.ad.analog.com (ashbmbx9.ad.analog.com [10.64.17.10]) by nwd2mta3.analog.com (8.14.7/8.14.7) with ESMTP id 0AHGIeJv039803 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=FAIL); Tue, 17 Nov 2020 11:18:40 -0500 Received: from ASHBMBX9.ad.analog.com (10.64.17.10) by ASHBMBX9.ad.analog.com (10.64.17.10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1779.2; Tue, 17 Nov 2020 11:18:39 -0500 Received: from zeus.spd.analog.com (10.66.68.11) by ASHBMBX9.ad.analog.com (10.64.17.10) with Microsoft SMTP Server id 15.1.1779.2 via Frontend Transport; Tue, 17 Nov 2020 11:18:39 -0500 Received: from localhost.localdomain ([10.48.65.12]) by zeus.spd.analog.com (8.15.1/8.15.1) with ESMTP id 0AHGIRTU032565; Tue, 17 Nov 2020 11:18:38 -0500 From: Alexandru Ardelean To: , CC: , , Alexandru Ardelean Subject: [RFC PATCH 08/12] iio: buffer: add helper to get the IIO device to which a buffer belongs Date: Tue, 17 Nov 2020 18:23:36 +0200 Message-ID: <20201117162340.43924-9-alexandru.ardelean@analog.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201117162340.43924-1-alexandru.ardelean@analog.com> References: <20201117162340.43924-1-alexandru.ardelean@analog.com> MIME-Version: 1.0 X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.312,18.0.737 definitions=2020-11-17_06:2020-11-17,2020-11-17 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 mlxscore=0 priorityscore=1501 suspectscore=0 impostorscore=0 lowpriorityscore=0 bulkscore=0 clxscore=1015 spamscore=0 adultscore=0 mlxlogscore=787 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2011170117 Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org This is useful for drivers that may have a reference to an IIO buffer, to be able to get a reference back to the IIO device. Signed-off-by: Alexandru Ardelean --- drivers/iio/industrialio-buffer.c | 14 ++++++++++++++ include/linux/iio/buffer.h | 2 ++ 2 files changed, 16 insertions(+) diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c index 8b4b7baf21da..342e5432f7d9 100644 --- a/drivers/iio/industrialio-buffer.c +++ b/drivers/iio/industrialio-buffer.c @@ -1736,6 +1736,20 @@ void iio_buffer_put(struct iio_buffer *buffer) } EXPORT_SYMBOL_GPL(iio_buffer_put); +/** + * iio_buffer_get_iio_dev - Get the IIO device to which this buffer belongs to + * @buffer: The buffer for which to retrieve the IIO device + * + * This function retrieves the IIO device to which this IIO buffer is attached + * to. Given that an IIO device may have multiple IIO buffers, it's useful + * for some drivers to obtain a reference back to the IIO device. + */ +struct iio_dev *iio_buffer_get_iio_dev(struct iio_buffer *buffer) +{ + return buffer->indio_dev; +} +EXPORT_SYMBOL_GPL(iio_buffer_get_iio_dev); + /** * iio_device_attach_buffer - Attach a buffer to a IIO device * @indio_dev: The device the buffer should be attached to diff --git a/include/linux/iio/buffer.h b/include/linux/iio/buffer.h index 8febc23f5f26..b27d8c81f32c 100644 --- a/include/linux/iio/buffer.h +++ b/include/linux/iio/buffer.h @@ -11,6 +11,8 @@ struct iio_buffer; +struct iio_dev *iio_buffer_get_iio_dev(struct iio_buffer *buffer); + int iio_push_to_buffers(struct iio_dev *indio_dev, const void *data); /**