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: Peter Ujfalusi <peter.ujfalusi@ti.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

diff --git a/drivers/dma/omap-dma.c b/drivers/dma/omap-dma.c
index 1dfc71c90123fc30c7377684471da661799e1985..48f77c289cd3f5244b8025e128715644d70be115 100644 (file)
--- a/drivers/dma/omap-dma.c
+++ b/drivers/dma/omap-dma.c
@@ -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",

diff --git a/include/linux/omap-dma.h b/include/linux/omap-dma.h
index 88fa8af2b937c02a7402d5c8b2499009d4d0ff21..1d99b61adc65f1e224ff42a5df2d112f5ead91f0 100644 (file)
--- a/include/linux/omap-dma.h
+++ b/include/linux/omap-dma.h
@@ -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