OMAP: PM: Clear DMA channel state after a wakeup

Clear DMA channel states so that users can assume a known initial
state.

Signed-off-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c
index 1b5216f1e78d..8836da32d63b 100644
--- a/arch/arm/plat-omap/dma.c
+++ b/arch/arm/plat-omap/dma.c
@@ -2358,6 +2358,8 @@ void omap_dma_global_context_save(void)
 
 void omap_dma_global_context_restore(void)
 {
+        int ch;
+
         dma_write(omap_dma_global_context.dma_gcr, GCR);
         dma_write(omap_dma_global_context.dma_ocp_sysconfig,
                 OCP_SYSCONFIG);
@@ -2372,6 +2374,10 @@ void omap_dma_global_context_restore(void)
          */
         if (cpu_is_omap34xx() && (omap_type() != OMAP2_DEVICE_TYPE_GP))
                 dma_write(0x3 , IRQSTATUS_L0);
+
+        for (ch = 0; ch < dma_chan_count; ch++)
+                if (dma_chan[ch].dev_id != -1)
+                        omap_clear_dma(ch);
 }
 
 /*----------------------------------------------------------------------------*/