Add an option that configure the number of regular group conversions
that will trigger a DMA callback transfering data to the upper-half driver.
By default this value is 1 and the driver behaves the same as before
the change. Increasing this value allows to reduce the number of
DMA interrupts and achieve higher sampling rates.
DMA support for H5 and H7 is not complete so this change has no effect,
but for consistency they have also been modified.
The naming between ports has also been unified:
- dmabuffer -> r_dmabuffer
- nchannels -> rnchannels
- chanlist -> r_chanlist
- jchanlist -> j_chanlist
Signed-off-by: raiden00pl <raiden00@railab.me>
0a23b0c14e