diff options
| author | Padmavathi Venna <padma.v@samsung.com> | 2013-02-14 09:10:06 +0530 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2013-02-14 20:04:27 +0530 |
| commit | a80258f9b2ac81e72ff680d273df9544a1307a32 (patch) | |
| tree | 2797ea0a381780cea4369fc2fb6d1802b9c3249b /drivers/dma | |
| parent | 34d19355b84adde9eebc1d6771231c15dff891e6 (diff) | |
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>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/pl330.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c index 40e97528244..f5d47e617df 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); |