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DMA: PL330: Infer transfer direction from transfer request instead of platform data

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The transfer direction for a channel can be inferred from the transfer
request and the need for specifying transfer direction in platfrom data
can be eliminated. So the structure definition 'struct dma_pl330_peri'
is no longer required.

The channel's private data is set to point to a channel id specified in
the platform data (instead of an instance of type 'struct dma_pl330_peri').
The filter function is correspondingly modified to match the channel id.

With the 'struct dma_pl330_peri' removed from platform data, the dma
controller transfer capabilities cannot be inferred any more. Hence,
the dma controller capabilities is specified using platform data.

Acked-by: Jassi Brar <jassisinghbrar@gmail.com>
Acked-by: Boojin Kim <boojin.kim@samsung.com>
Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This commit is contained in:
Thomas Abraham
2011-10-24 11:43:11 +02:00
committed by Kukjin Kim
parent 3e2ec13a81
commit cd07251521
2 changed files with 19 additions and 59 deletions
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13
include/linux/amba/pl330.h
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@@ -15,15 +15,6 @@
#include <linux/dmaengine.h>
#include <asm/hardware/pl330.h>
struct dma_pl330_peri {
/*
* Peri_Req i/f of the DMAC that is
* peripheral could be reached from.
*/
u8 peri_id; /* specific dma id */
enum pl330_reqtype rqtype;
};
struct dma_pl330_platdata {
/*
* Number of valid peripherals connected to DMAC.
@@ -34,7 +25,9 @@ struct dma_pl330_platdata {
*/
u8 nr_valid_peri;
/* Array of valid peripherals */
struct dma_pl330_peri *peri;
u8 *peri_id;
/* Operational capabilities */
dma_cap_mask_t cap_mask;
/* Bytes to allocate for MC buffer */
unsigned mcbuf_sz;
};