On Tue, Oct 25, 2016 at 12:37:59AM +0000, Kuninori Morimoto wrote:

> Current Renesas Sound driver requests DMA channel when .probe timing,
> and release it when .remove timing. And use DMA on .start/.stop
> But, Audio DMAC power ON was handled when request timing (= .probe),
> and power OFF was when release timing (= .remove).
> This means Audio DMAC power is always ON during driver was enabled.
> This patch fixup to request/release DMA channel each time.

Isn't this something which should be handled by better power management
in the DMA driver rather than this?