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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>
This commit is contained in:
Linus Walleij 2017-01-13 16:02:03 +01:00 committed by Vinod Koul
parent 0c744ea4f7
commit 49873e99b7
1 changed files with 4 additions and 2 deletions
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6
drivers/dma/ste_dma40.c
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@ -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