dmaengine: sf-pdma: Get number of channel by device tree

It currently assumes that there are always four channels, it would
cause the error if there is actually less than four channels. Change
that by getting number of channel from device tree.

For backwards-compatibility, it uses the default value (i.e. 4) when
there is no 'dma-channels' information in dts.

Signed-off-by: Zong Li <[email protected]>
Acked-by: Palmer Dabbelt <[email protected]>
Reviewed-by: Bin Meng <[email protected]>
Link: https://lore.kernel.org/r/f08a95b6582a51712c5b2c3cb859136d07bfa8b9.1648461096.git.zong.li@sifive.com
Signed-off-by: Vinod Koul <[email protected]>

0 files changed, 0 insertions, 0 deletions