diff options
| author | Joy Chakraborty <[email protected]> | 2023-05-12 10:47:43 +0000 |
|---|---|---|
| committer | Mark Brown <[email protected]> | 2023-05-15 10:46:16 +0900 |
| commit | d1ca1c5297ba9260942c0b3f1171a98a432bdfec (patch) | |
| tree | 3043d9c0cb9360283ed259dd467897667ad43cb7 /net/lapb/lapb_subr.c | |
| parent | f603a3f083aeb9438865975c28b27be0afaae0c1 (diff) | |
spi: dw: Add DMA directional capability check
Check capabilities of DMA controller during init to make sure it is
capable of handling MEM2DEV for tx channel, DEV2MEM for rx channel.
Current DW DMA driver requires both tx and rx channel to be configured
and functional for any kind of transfers to take effect including
half duplex. Hence, check for both tx and rx direction and fail on
unavailbility of either.
* tested on Baikal-T1 based system with DW SPI-looped back interface
transferring a chunk of data with DFS:8,12,16.
Signed-off-by: Joy Chakraborty <[email protected]
Reviewed-by: Serge Semin <[email protected]
Tested-by: Serge Semin <[email protected]
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]
Diffstat (limited to 'net/lapb/lapb_subr.c')
0 files changed, 0 insertions, 0 deletions