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dma: sh: use an integer slave ID to improve API compatibility

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Initially struct shdma_slave has been introduced with the only member - an
unsigned slave ID - to describe common properties of DMA slaves in an
extensible way. However, experience shows, that a slave ID is indeed the
only parameter, needed to identify DMA slaves. This is also, what is used
by the core dmaengine API in struct dma_slave_config. We switch to using
the slave_id directly, instead of passing a pointer to struct shdma_slave
to improve compatibility with the core. We also make the slave_id signed
for easier error checking.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
This commit is contained in:
Guennadi Liakhovetski 2012-07-05 12:29:41 +02:00 • committed by Vinod Koul
parent ecf90fbbdc
commit c2cdb7e4d1
4 changed files with 27 additions and 26 deletions
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8
include/linux/sh_dma.h
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@ -27,10 +27,10 @@ struct sh_dmae_slave {
* a certain peripheral
*/
struct sh_dmae_slave_config {
unsigned int slave_id;
dma_addr_t addr;
u32 chcr;
char mid_rid;
int slave_id;
dma_addr_t addr;
u32 chcr;
char mid_rid;
};
struct sh_dmae_channel {