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: 9630797 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 C6B9E60245 for ; Fri, 17 Mar 2017 14:09:57 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id AD3D228490 for ; Fri, 17 Mar 2017 14:09:57 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A2222285A1; Fri, 17 Mar 2017 14:09:57 +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,DKIM_SIGNED, DKIM_VALID autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 299E528490 for ; Fri, 17 Mar 2017 14:09:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=fPNmKRa3cc+/5DvKO070FKS04jkJtrgOtDzz65skY0Q=; b=CoWMloZzG2HkFt 1xyZtx1jvYM1FnM8W6j42DV+6p7w2/Uzyi5fGqEsCwslfKqZTtPvsSmCxcHh22kw0Su9sDPKhOfga GizTnDfjT3m1SFbpkf2tV/ZrwO8k2kzsXdrnZfE5wSrnXbfyStU9aXp4O76U3SwJmBvrkFQyvLpYU AC/PMWjGz0gDonDOKtriKe7xp1wfE0b76JwTf6SMDuUl4u78HRRp0qfxy8ddjSF+a3JVfZptd6jFB 4qZF4qEUYiNRoUvCmbzqCPgyPm6ECisMeIM6yAyDE2ZD3ZNGmX5rEvMU9QhnK+xu8wVWfcew0p/gc ohizIcheRaRi73kFZ9Hg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1cosZm-00014L-0g; Fri, 17 Mar 2017 14:09:54 +0000 Received: from mx08-00178001.pphosted.com ([91.207.212.93] helo=mx07-00178001.pphosted.com) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1cosZJ-0000Wl-QL for linux-arm-kernel@lists.infradead.org; Fri, 17 Mar 2017 14:09:29 +0000 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 Subject: [PATCH v3 07/11] IIO: consumer: allow to set buffer sizes 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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170317_070926_177141_5910A1DB X-CRM114-Status: UNSURE ( 9.44 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.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. */