From patchwork Fri Mar 17 14:08:20 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnaud POULIQUEN X-Patchwork-Id: 9630807 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id A390360245 for ; Fri, 17 Mar 2017 14:10:58 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8A5E5285E3 for ; Fri, 17 Mar 2017 14:10:58 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7F231285EB; Fri, 17 Mar 2017 14:10:58 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE autolearn=unavailable version=3.3.1 Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BAF9128604 for ; Fri, 17 Mar 2017 14:10:57 +0000 (UTC) Received: from alsa0.perex.cz (localhost [127.0.0.1]) by alsa0.perex.cz (Postfix) with ESMTP id 3BF92267212; Fri, 17 Mar 2017 15:09:12 +0100 (CET) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa0.perex.cz (Postfix, from userid 1000) id 5C85826720C; Fri, 17 Mar 2017 15:09:06 +0100 (CET) Received: from mx07-00178001.pphosted.com (mx08-00178001.pphosted.com [91.207.212.93]) by alsa0.perex.cz (Postfix) with ESMTP id 049B22669D8 for ; Fri, 17 Mar 2017 15:08:58 +0100 (CET) Received: from pps.filterd (m0046660.ppops.net [127.0.0.1]) by mx08-00178001.pphosted.com (8.16.0.11/8.16.0.11) with SMTP id v2HE1Te6013864; Fri, 17 Mar 2017 15:08:58 +0100 Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx08-.pphosted.com with ESMTP id 297y07xhs4-1 (version=TLSv1 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NOT); Fri, 17 Mar 2017 15:08:58 +0100 Received: from zeta.dmz-eu.st.com (zeta.dmz-eu.st.com [164.129.230.9]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id EF8AF34; Fri, 17 Mar 2017 14:08:57 +0000 (GMT) Received: from Webmail-eu.st.com (Safex1hubcas21.st.com [10.75.90.44]) by zeta.dmz-eu.st.com (STMicroelectronics) with ESMTP id B74D12992; Fri, 17 Mar 2017 14:08:57 +0000 (GMT) Received: from localhost (10.201.23.162) by Webmail-ga.st.com (10.75.90.48) with Microsoft SMTP Server (TLS) id 14.3.319.2; Fri, 17 Mar 2017 15:08:57 +0100 From: Arnaud Pouliquen To: Rob Herring , Mark Rutland , Jonathan Cameron , Hartmut Knaack , Lars-Peter Clausen , Peter Meerwald-Stadler , Jaroslav Kysela , Takashi Iwai , Liam Girdwood , Mark Brown Date: Fri, 17 Mar 2017 15:08:20 +0100 Message-ID: <1489759704-30217-8-git-send-email-arnaud.pouliquen@st.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1489759704-30217-1-git-send-email-arnaud.pouliquen@st.com> References: <1489759704-30217-1-git-send-email-arnaud.pouliquen@st.com> MIME-Version: 1.0 X-Originating-IP: [10.201.23.162] X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-03-17_11:, , signatures=0 Cc: devicetree@vger.kernel.org, alsa-devel@alsa-project.org, olivier moysan , kernel@stlinux.com, linux-iio@vger.kernel.org, arnaud.pouliquen@st.com, Maxime Coquelin , linux-arm-kernel@lists.infradead.org, Alexandre Torgue Subject: [alsa-devel] [PATCH v3 07/11] IIO: consumer: allow to set buffer sizes X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org X-Virus-Scanned: ClamAV using ClamSMTP Add iio consumer API to set buffer size and watermark according to sysfs API. Signed-off-by: Arnaud Pouliquen --- drivers/iio/buffer/industrialio-buffer-cb.c | 12 ++++++++++++ include/linux/iio/consumer.h | 13 +++++++++++++ 2 files changed, 25 insertions(+) diff --git a/drivers/iio/buffer/industrialio-buffer-cb.c b/drivers/iio/buffer/industrialio-buffer-cb.c index b8f550e..43c066a 100644 --- a/drivers/iio/buffer/industrialio-buffer-cb.c +++ b/drivers/iio/buffer/industrialio-buffer-cb.c @@ -103,6 +103,18 @@ struct iio_cb_buffer *iio_channel_get_all_cb(struct device *dev, } EXPORT_SYMBOL_GPL(iio_channel_get_all_cb); +int iio_channel_cb_set_buffer_params(struct iio_cb_buffer *cb_buff, + size_t length, size_t watermark) +{ + if (!length || length < watermark) + return -EINVAL; + cb_buff->buffer.watermark = watermark; + cb_buff->buffer.length = length; + + return 0; +} +EXPORT_SYMBOL_GPL(iio_channel_start_all_cb); + int iio_channel_start_all_cb(struct iio_cb_buffer *cb_buff) { return iio_update_buffers(cb_buff->indio_dev, &cb_buff->buffer, diff --git a/include/linux/iio/consumer.h b/include/linux/iio/consumer.h index cb44771..0f6e94d 100644 --- a/include/linux/iio/consumer.h +++ b/include/linux/iio/consumer.h @@ -134,6 +134,19 @@ struct iio_cb_buffer *iio_channel_get_all_cb(struct device *dev, void *private), void *private); /** + * iio_channel_cb_set_buffer_size() - set the buffer length. + * @cb_buffer: The callback buffer from whom we want the channel + * information. + * @length: buffer length in bytes + * @watermark: buffer watermark in bytes + * + * This function allows to configure the buffer length. The watermark if + * forced to half of the buffer. + */ +int iio_channel_cb_set_buffer_params(struct iio_cb_buffer *cb_buffer, + size_t length, size_t watermark); + +/** * iio_channel_release_all_cb() - release and unregister the callback. * @cb_buffer: The callback buffer that was allocated. */