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54 lines
1.6 KiB
Diff
54 lines
1.6 KiB
Diff
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From f8692ecd13a787c51eca9234312f5f3fd163a04a Mon Sep 17 00:00:00 2001
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From: Shengjiu Wang <shengjiu.wang@freescale.com>
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Date: Mon, 5 Jun 2017 11:05:52 +0800
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Subject: [PATCH] MLK-15003-1: DMA: fsl-edma-v3: add one more parameter for
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xlate
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The parameter is "is_remote", which is to use remote access for
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edma, the default access is local access.
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Signed-off-by: Shengjiu Wang <shengjiu.wang@freescale.com>
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(cherry picked from commit eee976b30b0523680f30e762742984f5b5a01b97)
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---
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drivers/dma/fsl-edma-v3.c | 8 +++++++-
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1 file changed, 7 insertions(+), 1 deletion(-)
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--- a/drivers/dma/fsl-edma-v3.c
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+++ b/drivers/dma/fsl-edma-v3.c
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@@ -139,6 +139,7 @@ struct fsl_edma3_chan {
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int hw_chanid;
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int priority;
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int is_rxchan;
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+ int is_remote;
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struct dma_pool *tcd_pool;
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u32 chn_real_count;
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char txirq_name[32];
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@@ -189,6 +190,10 @@ static void fsl_edma3_enable_request(str
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else
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val |= EDMA_CH_SBR_WR;
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}
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+
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+ if (fsl_chan->is_remote)
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+ val &= ~(EDMA_CH_SBR_RD | EDMA_CH_SBR_WR);
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+
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writel(val, addr + EDMA_CH_SBR);
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val = readl(addr + EDMA_CH_CSR);
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@@ -686,7 +691,7 @@ static struct dma_chan *fsl_edma3_xlate(
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struct dma_chan *chan, *_chan;
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struct fsl_edma3_chan *fsl_chan;
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- if (dma_spec->args_count != 3)
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+ if (dma_spec->args_count != 4)
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return NULL;
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mutex_lock(&fsl_edma3->fsl_edma3_mutex);
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@@ -701,6 +706,7 @@ static struct dma_chan *fsl_edma3_xlate(
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chan->device->privatecnt++;
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fsl_chan->priority = dma_spec->args[1];
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fsl_chan->is_rxchan = dma_spec->args[2];
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+ fsl_chan->is_remote = dma_spec->args[3];
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mutex_unlock(&fsl_edma3->fsl_edma3_mutex);
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return chan;
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}
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