[PATCH 23/28] OMAP: PM: Clear DMA channel state after a wakeup

Kevin Hilman
2009-10-01T23:59:35Z

From: Aaro Koskinen <aaro.koskinen@nokia.com>

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

Signed-off-by: Aaro Koskinen <aaro.koskinen@nokia.com>
---
arch/arm/plat-omap/dma.c | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c
index b3e1f77..f24d989 100644
--- a/arch/arm/plat-omap/dma.c
+++ b/arch/arm/plat-omap/dma.c
@@ -2358,6 +2358,8 @@ EXPORT_SYMBOL(omap_dma_global_context_save);

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);
}
EXPORT_SYMBOL(omap_dma_global_context_restore);

--
1.6.4.3