From a80258f9b2ac81e72ff680d273df9544a1307a32 Mon Sep 17 00:00:00 2001
From: Padmavathi Venna <padma.v@samsung.com>
Date: Thu, 14 Feb 2013 09:10:06 +0530
Subject: [PATCH] DMA: PL330: Add xlate function
Add xlate to translate the device-tree binding information into
the appropriate format. The filter function requires the dma
controller device and dma channel number as filter_params.
Signed-off-by: Padmavathi Venna <padma.v@samsung.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
---
drivers/dma/pl330.c | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index 40e97528244b..f5d47e617df2 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -25,6 +25,7 @@
#include <linux/amba/pl330.h>
#include <linux/scatterlist.h>
#include <linux/of.h>
+#include <linux/of_dma.h>
#include "dmaengine.h"
#define PL330_MAX_CHAN 8
@@ -2379,6 +2380,30 @@ bool pl330_filter(struct dma_chan *chan, void *param)
}
EXPORT_SYMBOL(pl330_filter);
+static struct dma_chan *of_dma_pl330_xlate(struct of_phandle_args *dma_spec,
+ struct of_dma *ofdma)
+{
+ int count = dma_spec->args_count;
+ struct dma_pl330_dmac *pdmac = ofdma->of_dma_data;
+ struct dma_pl330_filter_args fargs;
+ dma_cap_mask_t cap;
+
+ if (!pdmac)
+ return NULL;
+
+ if (count != 1)
+ return NULL;
+
+ fargs.pdmac = pdmac;
+ fargs.chan_id = dma_spec->args[0];
+
+ dma_cap_zero(cap);
+ dma_cap_set(DMA_SLAVE, cap);
+ dma_cap_set(DMA_CYCLIC, cap);
+
+ return dma_request_channel(cap, pl330_dt_filter, &fargs);
+}
+
static int pl330_alloc_chan_resources(struct dma_chan *chan)
{
struct dma_pl330_chan *pch = to_pchan(chan);