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dmaengine: omap-dma: move register read/writes into omap-dma.c

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Export the DMA register information from the SoC specific data, such
that we can access the registers directly in omap-dma.c, mapping the
register region ourselves as well.

Rather than calculating the DMA channel register in its entirety for
each access, we pre-calculate an offset base address for the allocated
DMA channel and then just use the appropriate register offset.

Acked-by: Tony Lindgren <tony@atomide.com>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2013-12-10 11:08:01 +00:00
parent 34a378fcb9
commit 596c471b69
4 changed files with 105 additions and 15 deletions
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2
include/linux/omap-dma.h
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@ -285,6 +285,8 @@ struct omap_dma_reg {
/* System DMA platform data structure */
struct omap_system_dma_plat_info {
const struct omap_dma_reg *reg_map;
unsigned channel_stride;
struct omap_dma_dev_attr *dma_attr;
u32 errata;
void (*show_dma_caps)(void);