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From: Peng Ma <peng.ma@nxp.com>
To: vkoul@kernel.org, robh+dt@kernel.org, shawnguo@kernel.org,
	mark.rutland@arm.com, leoyang.li@nxp.com
Cc: devicetree@vger.kernel.org, Peng Ma <peng.ma@nxp.com>,
	linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org,
	dan.j.williams@intel.com, linux-arm-kernel@lists.infradead.org
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> (raw)
In-Reply-To: <20190506090344.37784-1-peng.ma@nxp.com>

improve edma driver to support little endian.

Signed-off-by: Peng Ma <peng.ma@nxp.com>
---
 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


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  parent reply index

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-06  9:03 [PATCH 1/4] arm64: dts: fsl: ls1028a: Add qDMA node Peng Ma
2019-05-06  9:03 ` [PATCH 2/4] arm64: dts: fsl: ls1028a: Add eDMA node Peng Ma
2019-06-18 13:13   ` Shawn Guo
2019-06-19  1:47     ` [EXT] " Peng Ma
2019-05-06  9:03 ` Peng Ma [this message]
2019-05-21  4:38   ` [PATCH 3/4] dmaengine: fsl-edma: support little endian for edma driver Vinod Koul
2019-05-22  6:33     ` [EXT] " Peng Ma
2019-05-06  9:03 ` [PATCH 4/4] dt-bindings: fsl-qdma: Add LS1028A qDMA bindings Peng Ma
2019-06-13 18:07   ` Rob Herring
2019-06-18 13:08   ` Shawn Guo
2019-06-18 13:06 ` [PATCH 1/4] arm64: dts: fsl: ls1028a: Add qDMA node Shawn Guo

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