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| author | Vignesh Raghavendra <vigneshr@ti.com> | 2019-12-04 22:17:20 +0530 |
|---|---|---|
| committer | Joe Hershberger <joe.hershberger@ni.com> | 2019-12-09 09:47:43 -0600 |
| commit | b8a4dd28f3b719d176fed5dc8d23a898463b072c (patch) | |
| tree | 24165070b5a39e8a4a63d5e11a5673815bcf6af3 /include/dma-uclass.h | |
| parent | 08b3e90a0168c9053c9bdd7df5d187cb6668a4c6 (diff) | |
| download | u-boot-b8a4dd28f3b719d176fed5dc8d23a898463b072c.zip u-boot-b8a4dd28f3b719d176fed5dc8d23a898463b072c.tar.gz u-boot-b8a4dd28f3b719d176fed5dc8d23a898463b072c.tar.bz2 | |
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 <vigneshr@ti.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Diffstat (limited to 'include/dma-uclass.h')
| -rw-r--r-- | include/dma-uclass.h | 11 |
1 files changed, 11 insertions, 0 deletions
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 |