From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,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 D0C23C32751 for ; Wed, 31 Jul 2019 21:53:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A2B5620659 for ; Wed, 31 Jul 2019 21:53:05 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=st.com header.i=@st.com header.b="h9e0mGr+" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730348AbfGaVxF (ORCPT ); Wed, 31 Jul 2019 17:53:05 -0400 Received: from mx08-00178001.pphosted.com ([91.207.212.93]:33562 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727987AbfGaVxF (ORCPT ); Wed, 31 Jul 2019 17:53:05 -0400 Received: from pps.filterd (m0046661.ppops.net [127.0.0.1]) by mx08-00178001.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x6VLpu42005721; Wed, 31 Jul 2019 23:52:57 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=st.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding : content-type; s=STMicroelectronics; bh=Ly3YJPVIY4xEVEoftD3Syia6lWrUfkDdvryFpEXMeoE=; b=h9e0mGr+6ebQzLG2QoStRPnOdHGDdZitwvGe6PYXuTLNMO47eHDmAYJpp7v5l4Odpiu2 UHuk/CkHPsqqT11rYsz3W+ROZcQ9lJmF+pMur1hymHz3AjsUuuP1L1tZ9sTd5UgZNLzX XbzkW/EiXBJaFrD709BzGWtQxz0Mj4C0+ntvNF7hxtlY9tCCv2BiU0NfGjW182HArHC7 O4CuK8oRxzfALxiCHOJnrq4wO6aDIetIqOREnLx1LejP5bgZT4MFtq7FOu+SO/5jCJVm 9IJSWTmO+oHNscDnO59/Vc88d8hSpCdBwl9kLV1ZTb1CTBF++IY/315d3UELJ0GtvKMt /A== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx08-00178001.pphosted.com with ESMTP id 2u2jp4heyu-1 (version=TLSv1 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NOT); Wed, 31 Jul 2019 23:52:57 +0200 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id B102131; Wed, 31 Jul 2019 21:52:56 +0000 (GMT) Received: from Webmail-eu.st.com (sfhdag1node1.st.com [10.75.127.1]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id A7A38777EB; Wed, 31 Jul 2019 23:52:56 +0200 (CEST) Received: from localhost (10.75.127.45) by SFHDAG1NODE1.st.com (10.75.127.1) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Wed, 31 Jul 2019 23:52:55 +0200 From: Denis Ciocca To: , , CC: Denis Ciocca Subject: [PATCH 1/5] iio:common: introduce st_sensors_buffer_preenable/predisable functions Date: Wed, 31 Jul 2019 14:52:46 -0700 Message-ID: <20190731215250.16403-2-denis.ciocca@st.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190731215250.16403-1-denis.ciocca@st.com> References: <20190731215250.16403-1-denis.ciocca@st.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.75.127.45] X-ClientProxiedBy: SFHDAG7NODE3.st.com (10.75.127.21) To SFHDAG1NODE1.st.com (10.75.127.1) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-07-31_11:,, signatures=0 Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org This patch is introducing preenable/postdisable in the common st_sensors_buffer code in order to remove the memory allocation / de-allocation from each single st driver. Signed-off-by: Denis Ciocca --- .../iio/common/st_sensors/st_sensors_buffer.c | 22 +++++++++++++++++++ include/linux/iio/common/st_sensors.h | 2 ++ 2 files changed, 24 insertions(+) diff --git a/drivers/iio/common/st_sensors/st_sensors_buffer.c b/drivers/iio/common/st_sensors/st_sensors_buffer.c index eee30130ae23..9da1c8104883 100644 --- a/drivers/iio/common/st_sensors/st_sensors_buffer.c +++ b/drivers/iio/common/st_sensors/st_sensors_buffer.c @@ -81,6 +81,28 @@ irqreturn_t st_sensors_trigger_handler(int irq, void *p) } EXPORT_SYMBOL(st_sensors_trigger_handler); +int st_sensors_buffer_preenable(struct iio_dev *indio_dev) +{ + struct st_sensor_data *sdata = iio_priv(indio_dev); + + sdata->buffer_data = kmalloc(indio_dev->scan_bytes, + GFP_DMA | GFP_KERNEL); + if (!sdata->buffer_data) + return -ENOMEM; + + return 0; +} +EXPORT_SYMBOL(st_sensors_buffer_preenable); + +int st_sensors_buffer_postdisable(struct iio_dev *indio_dev) +{ + struct st_sensor_data *sdata = iio_priv(indio_dev); + + kfree(sdata->buffer_data); + return 0; +} +EXPORT_SYMBOL(st_sensors_buffer_postdisable); + MODULE_AUTHOR("Denis Ciocca "); MODULE_DESCRIPTION("STMicroelectronics ST-sensors buffer"); MODULE_LICENSE("GPL v2"); diff --git a/include/linux/iio/common/st_sensors.h b/include/linux/iio/common/st_sensors.h index 28fc1f9fa7d5..c66ebb236a15 100644 --- a/include/linux/iio/common/st_sensors.h +++ b/include/linux/iio/common/st_sensors.h @@ -254,6 +254,8 @@ struct st_sensor_data { #ifdef CONFIG_IIO_BUFFER irqreturn_t st_sensors_trigger_handler(int irq, void *p); +int st_sensors_buffer_preenable(struct iio_dev *indio_dev); +int st_sensors_buffer_postdisable(struct iio_dev *indio_dev); #endif #ifdef CONFIG_IIO_TRIGGER -- 2.22.0