From b8a4dd28f3b719d176fed5dc8d23a898463b072c Mon Sep 17 00:00:00 2001 From: Vignesh Raghavendra Date: Wed, 4 Dec 2019 22:17:20 +0530 Subject: dma: Introduce dma_get_cfg() interface Sometimes, there would be a need to exchange data between DMA provider and DMA client which are very specific to DMA driver of the SoC/platform and are not generic enough to be put into struct dma. Therefore, introduce dma_get_cfg() interface to get DMA provider specific data from client device. Clients can use unique configuration ID flags to get different configuration data from DMA driver. Signed-off-by: Vignesh Raghavendra Acked-by: Joe Hershberger Reviewed-by: Grygorii Strashko --- include/dma.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'include/dma.h') diff --git a/include/dma.h b/include/dma.h index d1c3d0df7d..6c55aa3a00 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 */ /* -- cgit v1.2.3