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>

diff --git a/drivers/dma/fsl-edma-v3.c b/drivers/dma/fsl-edma-v3.c
index 042154f..c20306c 100644 (file)
--- 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(struct fsl_edma3_chan *fsl_chan)
                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 of_phandle_args *dma_spec,
        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(struct of_phandle_args *dma_spec,
                        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;
                }