diff options
| author | Viresh Kumar <viresh.kumar@st.com> | 2011-11-17 16:01:29 +0530 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@linux.intel.com> | 2011-11-28 08:48:02 +0530 |
| commit | 61e183f8306934a9f66557f69f1f0f56f18dca06 (patch) | |
| tree | 07f205fe60f4d5fe5a69a5406789e7510effd20f /drivers/dma/dw_dmac_regs.h | |
| parent | e69664336d6400cc1685716ee5f04ef74e85703e (diff) | |
dmaengine/dw_dmac: Reconfigure interrupt and chan_cfg register on resume
In S2R all DMA registers are reset by hardware and thus they are required to be
reprogrammed. The channels which aren't reprogrammed are channel configuration
and interrupt enable registers, which are currently programmed at chan_alloc
time.
This patch creates another routine to initialize a channel. It will try to
initialize channel on every dwc_dostart() call. If channel is already
initialised then it simply returns, otherwise it configures registers.
This routine will also initialize registers on wakeup from S2R, as we mark
channels as uninitialized on suspend.
Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
Diffstat (limited to 'drivers/dma/dw_dmac_regs.h')
| -rw-r--r-- | drivers/dma/dw_dmac_regs.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/dma/dw_dmac_regs.h b/drivers/dma/dw_dmac_regs.h index c3419518d701..5eef6946a367 100644 --- a/drivers/dma/dw_dmac_regs.h +++ b/drivers/dma/dw_dmac_regs.h @@ -140,6 +140,7 @@ struct dw_dma_chan { u8 mask; u8 priority; bool paused; + bool initialized; spinlock_t lock; |