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