diff options
| 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 /drivers/dma | |
| parent | 08b3e90a0168c9053c9bdd7df5d187cb6668a4c6 (diff) | |
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 'drivers/dma')
| -rw-r--r-- | drivers/dma/dma-uclass.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/dma/dma-uclass.c b/drivers/dma/dma-uclass.c index 0ff56f7e88..5598bca21c 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) |