From patchwork Tue Aug 25 12:48:31 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandru Ardelean X-Patchwork-Id: 11735695 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 24DC3913 for ; Tue, 25 Aug 2020 12:49:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 17025207D3 for ; Tue, 25 Aug 2020 12:49:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727013AbgHYMtw (ORCPT ); Tue, 25 Aug 2020 08:49:52 -0400 Received: from mx0a-00128a01.pphosted.com ([148.163.135.77]:19564 "EHLO mx0a-00128a01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729040AbgHYMsY (ORCPT ); Tue, 25 Aug 2020 08:48:24 -0400 Received: from pps.filterd (m0167089.ppops.net [127.0.0.1]) by mx0a-00128a01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 07PCmA63018883; Tue, 25 Aug 2020 08:48:12 -0400 Received: from nwd2mta3.analog.com ([137.71.173.56]) by mx0a-00128a01.pphosted.com with ESMTP id 3330951ggh-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 25 Aug 2020 08:48:12 -0400 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 07PCmA7R034798 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=FAIL); Tue, 25 Aug 2020 08:48:10 -0400 Received: from ASHBCASHYB4.ad.analog.com (10.64.17.132) 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, 25 Aug 2020 08:48:10 -0400 Received: from ASHBMBX9.ad.analog.com (10.64.17.10) by ASHBCASHYB4.ad.analog.com (10.64.17.132) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1779.2; Tue, 25 Aug 2020 08:48:09 -0400 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, 25 Aug 2020 08:48:09 -0400 Received: from localhost.localdomain ([10.48.65.12]) by zeus.spd.analog.com (8.15.1/8.15.1) with ESMTP id 07PCm0jL001781; Tue, 25 Aug 2020 08:48:07 -0400 From: Alexandru Ardelean To: , CC: , , , , Alexandru Ardelean Subject: [PATCH v2 4/6] dmaengine: axi-dmac: wrap entire dt parse in a function Date: Tue, 25 Aug 2020 15:48:31 +0300 Message-ID: <20200825124840.43664-5-alexandru.ardelean@analog.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200825124840.43664-1-alexandru.ardelean@analog.com> References: <20200825124840.43664-1-alexandru.ardelean@analog.com> MIME-Version: 1.0 X-ADIRoutedOnPrem: True X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235,18.0.687 definitions=2020-08-25_04:2020-08-25,2020-08-25 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 malwarescore=0 phishscore=0 mlxscore=0 bulkscore=0 adultscore=0 impostorscore=0 lowpriorityscore=0 priorityscore=1501 mlxlogscore=999 spamscore=0 suspectscore=8 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2008250097 Sender: dmaengine-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org All these attributes will be read from registers in newer core versions, so just wrap the logic into a function. Signed-off-by: Alexandru Ardelean --- drivers/dma/dma-axi-dmac.c | 40 +++++++++++++++++++++++--------------- 1 file changed, 24 insertions(+), 16 deletions(-) diff --git a/drivers/dma/dma-axi-dmac.c b/drivers/dma/dma-axi-dmac.c index f4b17b5e3914..1a1e227fa935 100644 --- a/drivers/dma/dma-axi-dmac.c +++ b/drivers/dma/dma-axi-dmac.c @@ -774,6 +774,28 @@ static int axi_dmac_parse_chan_dt(struct device_node *of_chan, return 0; } +static int axi_dmac_parse_dt(struct device *dev, struct axi_dmac *dmac) +{ + struct device_node *of_channels, *of_chan; + int ret; + + of_channels = of_get_child_by_name(dev->of_node, "adi,channels"); + if (of_channels == NULL) + return -ENODEV; + + for_each_child_of_node(of_channels, of_chan) { + ret = axi_dmac_parse_chan_dt(of_chan, &dmac->chan); + if (ret) { + of_node_put(of_chan); + of_node_put(of_channels); + return -EINVAL; + } + } + of_node_put(of_channels); + + return 0; +} + static int axi_dmac_detect_caps(struct axi_dmac *dmac, unsigned int version) { struct axi_dmac_chan *chan = &dmac->chan; @@ -823,7 +845,6 @@ static int axi_dmac_detect_caps(struct axi_dmac *dmac, unsigned int version) static int axi_dmac_probe(struct platform_device *pdev) { - struct device_node *of_channels, *of_chan; struct dma_device *dma_dev; struct axi_dmac *dmac; struct resource *res; @@ -854,22 +875,9 @@ static int axi_dmac_probe(struct platform_device *pdev) if (ret < 0) return ret; - of_channels = of_get_child_by_name(pdev->dev.of_node, "adi,channels"); - if (of_channels == NULL) { - ret = -ENODEV; + ret = axi_dmac_parse_dt(&pdev->dev, dmac); + if (ret < 0) goto err_clk_disable; - } - - for_each_child_of_node(of_channels, of_chan) { - ret = axi_dmac_parse_chan_dt(of_chan, &dmac->chan); - if (ret) { - of_node_put(of_chan); - of_node_put(of_channels); - ret = -EINVAL; - goto err_clk_disable; - } - } - of_node_put(of_channels); INIT_LIST_HEAD(&dmac->chan.active_descs);