From a80258f9b2ac81e72ff680d273df9544a1307a32 Mon Sep 17 00:00:00 2001 From: Padmavathi Venna Date: Thu, 14 Feb 2013 09:10:06 +0530 Subject: 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 Acked-by: Arnd Bergmann Signed-off-by: Vinod Koul --- drivers/dma/pl330.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) (limited to 'drivers/dma') 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 #include #include +#include #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); -- cgit v1.2.3