diff options
| -rw-r--r-- | drivers/dma/dma-uclass.c | 12 | ||||
| -rw-r--r-- | include/dma-uclass.h | 11 | ||||
| -rw-r--r-- | include/dma.h | 12 |
3 files changed, 35 insertions, 0 deletions
diff --git a/drivers/dma/dma-uclass.c b/drivers/dma/dma-uclass.c index 0ff56f7..5598bca 100644 --- a/drivers/dma/dma-uclass.c +++ b/drivers/dma/dma-uclass.c @@ -187,6 +187,18 @@ int dma_send(struct dma *dma, void *src, size_t len, void *metadata) return ops->send(dma, src, len, metadata); } + +int dma_get_cfg(struct dma *dma, u32 cfg_id, void **cfg_data) +{ + struct dma_ops *ops = dma_dev_ops(dma->dev); + + debug("%s(dma=%p)\n", __func__, dma); + + if (!ops->get_cfg) + return -ENOSYS; + + return ops->get_cfg(dma, cfg_id, cfg_data); +} #endif /* CONFIG_DMA_CHANNELS */ int dma_get_device(u32 transfer_type, struct udevice **devp) diff --git a/include/dma-uclass.h b/include/dma-uclass.h index 31b43fb..a1d9d26 100644 --- a/include/dma-uclass.h +++ b/include/dma-uclass.h @@ -108,6 +108,17 @@ struct dma_ops { * @return zero on success, or -ve error code. */ int (*send)(struct dma *dma, void *src, size_t len, void *metadata); + /** + * get_cfg() - Get DMA channel configuration for client's use + * + * @dma: The DMA Channel to manipulate + * @cfg_id: DMA provider specific ID to identify what + * configuration data client needs + * @data: Pointer to store pointer to DMA driver specific + * configuration data for the given cfg_id (output param) + * @return zero on success, or -ve error code. + */ + int (*get_cfg)(struct dma *dma, u32 cfg_id, void **data); #endif /* CONFIG_DMA_CHANNELS */ /** * transfer() - Issue a DMA transfer. The implementation must diff --git a/include/dma.h b/include/dma.h index d1c3d0d..6c55aa3 100644 --- a/include/dma.h +++ b/include/dma.h @@ -290,6 +290,18 @@ int dma_receive(struct dma *dma, void **dst, void *metadata); * @return zero on success, or -ve error code. */ int dma_send(struct dma *dma, void *src, size_t len, void *metadata); + +/** + * dma_get_cfg() - Get DMA channel configuration for client's use + * + * @dma: The DMA Channel to manipulate + * @cfg_id: DMA provider specific ID to identify what + * configuration data client needs + * @cfg_data: Pointer to store pointer to DMA driver specific + * configuration data for the given cfg_id (output param) + * @return zero on success, or -ve error code. + */ +int dma_get_cfg(struct dma *dma, u32 cfg_id, void **cfg_data); #endif /* CONFIG_DMA_CHANNELS */ /* |