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dmaengine: omap-dma: Add support for DMA filter mapping to slave devices

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Add support for providing device to filter_fn mapping so client drivers
can switch to use the dma_request_chan() API.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Peter Ujfalusi 2015-12-14 22:47:42 +02:00 committed by Vinod Koul
parent 23e6723c06
commit 020c62ae38
2 changed files with 10 additions and 0 deletions
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4
drivers/dma/omap-dma.c
View File

@ -1203,6 +1203,10 @@ static int omap_dma_probe(struct platform_device *pdev)
return rc;
}
od->ddev.filter.map = od->plat->slave_map;
od->ddev.filter.mapcnt = od->plat->slavecnt;
od->ddev.filter.fn = omap_dma_filter_fn;
rc = dma_async_device_register(&od->ddev);
if (rc) {
pr_warn("OMAP-DMA: failed to register slave DMA engine device: %d\n",

6
include/linux/omap-dma.h
View File

@ -267,6 +267,9 @@ struct omap_dma_reg {
u8 type;
};
#define SDMA_FILTER_PARAM(hw_req) ((int[]) { (hw_req) })
struct dma_slave_map;
/* System DMA platform data structure */
struct omap_system_dma_plat_info {
const struct omap_dma_reg *reg_map;
@ -278,6 +281,9 @@ struct omap_system_dma_plat_info {
void (*clear_dma)(int lch);
void (*dma_write)(u32 val, int reg, int lch);
u32 (*dma_read)(int reg, int lch);
const struct dma_slave_map *slave_map;
int slavecnt;
};
#ifdef CONFIG_ARCH_OMAP2PLUS