dmaengine: ste_dma40: indicate directions on channels

Since the introduction of the .directions flags, ste_dma40 was
never patched to indicate which transfer directions it can manage.
This causes a problem when trying to use the dmaengine for generic
ALSA SoC DMA:

ux500-msp-i2s.1: Failed to get DMA channel capabilities, falling
   back to period counting: -6

This patch fixes this issue by indicating the supported transfer
directions for slave and memcpy channels.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index 8684d11..2f0852d 100644 (file)
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -2809,12 +2809,14 @@ static void __init d40_chan_init(struct d40_base *base, struct dma_device *dma,
 
 static void d40_ops_init(struct d40_base *base, struct dma_device *dev)
 {
-       if (dma_has_cap(DMA_SLAVE, dev->cap_mask))
+       if (dma_has_cap(DMA_SLAVE, dev->cap_mask)) {
                dev->device_prep_slave_sg = d40_prep_slave_sg;
+               dev->directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);
+       }
 
        if (dma_has_cap(DMA_MEMCPY, dev->cap_mask)) {
                dev->device_prep_dma_memcpy = d40_prep_memcpy;
-
+               dev->directions = BIT(DMA_MEM_TO_MEM);
                /*
                 * This controller can only access address at even
                 * 32bit boundaries, i.e. 2^2