Commit 020c62ae authored by Peter Ujfalusi's avatar Peter Ujfalusi Committed by Vinod Koul
Browse files

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



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

Signed-off-by: default avatarPeter Ujfalusi <peter.ujfalusi@ti.com>
Reviewed-by: default avatarArnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent 23e6723c

drivers/dma/omap-dma.c

+4 −0
Original line number Diff line number Diff line
@@ -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",

include/linux/omap-dma.h

+6 −0
Original line number Diff line number Diff line
@@ -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