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=-8.9 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 9E30AC04AAA for ; Mon, 6 May 2019 09:11:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7B7542082F for ; Mon, 6 May 2019 09:11:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726492AbfEFJLs (ORCPT ); Mon, 6 May 2019 05:11:48 -0400 Received: from inva020.nxp.com ([92.121.34.13]:44052 "EHLO inva020.nxp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725883AbfEFJLh (ORCPT ); Mon, 6 May 2019 05:11:37 -0400 Received: from inva020.nxp.com (localhost [127.0.0.1]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id AD3041A024E; Mon, 6 May 2019 11:11:35 +0200 (CEST) Received: from invc005.ap-rdc01.nxp.com (invc005.ap-rdc01.nxp.com [165.114.16.14]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id C77381A0017; Mon, 6 May 2019 11:11:30 +0200 (CEST) Received: from titan.ap.freescale.net (TITAN.ap.freescale.net [10.192.208.233]) by invc005.ap-rdc01.nxp.com (Postfix) with ESMTP id 70EDE402C7; Mon, 6 May 2019 17:11:24 +0800 (SGT) From: Peng Ma To: vkoul@kernel.org, robh+dt@kernel.org, shawnguo@kernel.org, mark.rutland@arm.com, leoyang.li@nxp.com Cc: dan.j.williams@intel.com, dmaengine@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Peng Ma Subject: [PATCH 3/4] dmaengine: fsl-edma: support little endian for edma driver Date: Mon, 6 May 2019 09:03:43 +0000 Message-Id: <20190506090344.37784-3-peng.ma@nxp.com> X-Mailer: git-send-email 2.14.1 In-Reply-To: <20190506090344.37784-1-peng.ma@nxp.com> References: <20190506090344.37784-1-peng.ma@nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP Sender: dmaengine-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org improve edma driver to support little endian. Signed-off-by: Peng Ma --- drivers/dma/fsl-edma-common.c | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-) diff --git a/drivers/dma/fsl-edma-common.c b/drivers/dma/fsl-edma-common.c index 680b2a0..6bf238e 100644 --- a/drivers/dma/fsl-edma-common.c +++ b/drivers/dma/fsl-edma-common.c @@ -83,9 +83,14 @@ void fsl_edma_chan_mux(struct fsl_edma_chan *fsl_chan, u32 ch = fsl_chan->vchan.chan.chan_id; void __iomem *muxaddr; unsigned int chans_per_mux, ch_off; + int endian_diff[4] = {3, 1, -1, -3}; chans_per_mux = fsl_chan->edma->n_chans / DMAMUX_NR; ch_off = fsl_chan->vchan.chan.chan_id % chans_per_mux; + + if (!fsl_chan->edma->big_endian) + ch_off += endian_diff[ch_off % 4]; + muxaddr = fsl_chan->edma->muxbase[ch / chans_per_mux]; slot = EDMAMUX_CHCFG_SOURCE(slot); -- 1.7.1