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Date: Wed, 29 May 2019 17:08:43 +0800 From: yibin.gong@....com To: robh@...nel.org, shawnguo@...nel.org, s.hauer@...gutronix.de, festevam@...il.com, mark.rutland@....com, vkoul@...nel.org, dan.j.williams@...el.com Cc: linux-imx@....com, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, dmaengine@...r.kernel.org, devicetree@...r.kernel.org, kernel@...gutronix.de Subject: [PATCH v3 3/8] dmaengine: fsl-edma-common: move dmamux register to another single function From: Robin Gong <yibin.gong@....com> Prepare for edmav2 on i.mx7ulp whose dmamux register is 32bit. No function impacted. Signed-off-by: Robin Gong <yibin.gong@....com> --- drivers/dma/fsl-edma-common.c | 18 ++++++++++++++---- 1 file changed, 14 insertions(+), 4 deletions(-) diff --git a/drivers/dma/fsl-edma-common.c b/drivers/dma/fsl-edma-common.c index c9a17fc..bb24251 100644 --- a/drivers/dma/fsl-edma-common.c +++ b/drivers/dma/fsl-edma-common.c @@ -77,6 +77,19 @@ void fsl_edma_disable_request(struct fsl_edma_chan *fsl_chan) } EXPORT_SYMBOL_GPL(fsl_edma_disable_request); +static void mux_configure8(struct fsl_edma_chan *fsl_chan, void __iomem *addr, + u32 off, u32 slot, bool enable) +{ + u8 val8; + + if (enable) + val8 = EDMAMUX_CHCFG_ENBL | slot; + else + val8 = EDMAMUX_CHCFG_DIS; + + iowrite8(val8, addr + off); +} + void fsl_edma_chan_mux(struct fsl_edma_chan *fsl_chan, unsigned int slot, bool enable) { @@ -89,10 +102,7 @@ void fsl_edma_chan_mux(struct fsl_edma_chan *fsl_chan, muxaddr = fsl_chan->edma->muxbase[ch / chans_per_mux]; slot = EDMAMUX_CHCFG_SOURCE(slot); - if (enable) - iowrite8(EDMAMUX_CHCFG_ENBL | slot, muxaddr + ch_off); - else - iowrite8(EDMAMUX_CHCFG_DIS, muxaddr + ch_off); + mux_configure8(fsl_chan, muxaddr, ch_off, slot, enable); } EXPORT_SYMBOL_GPL(fsl_edma_chan_mux); -- 2.7.4
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