dmaengine: Freescale: add suspend resume functions for DMA driver

This patch adds suspend and resume functions for Freescale DMA driver.

Signed-off-by: Hongbo Zhang <hongbo.zhang@freescale.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/drivers/dma/fsldma.h b/drivers/dma/fsldma.h
index d56e83599825..f2e0c4dcf901 100644
--- a/drivers/dma/fsldma.h
+++ b/drivers/dma/fsldma.h
@@ -134,6 +134,17 @@ struct fsldma_device {
 #define FSL_DMA_CHAN_PAUSE_EXT  0x00001000
 #define FSL_DMA_CHAN_START_EXT  0x00002000
 
+#ifdef CONFIG_PM
+struct fsldma_chan_regs_save {
+        u32 mr;
+};
+
+enum fsldma_pm_state {
+        RUNNING = 0,
+        SUSPENDED,
+};
+#endif
+
 struct fsldma_chan {
         char name[8];                   /* Channel name */
         struct fsldma_chan_regs __iomem *regs;
@@ -148,6 +159,10 @@ struct fsldma_chan {
         struct tasklet_struct tasklet;
         u32 feature;
         bool idle;                      /* DMA controller is idle */
+#ifdef CONFIG_PM
+        struct fsldma_chan_regs_save regs_save;
+        enum fsldma_pm_state pm_state;
+#endif
 
         void (*toggle_ext_pause)(struct fsldma_chan *fsl_chan, int enable);
         void (*toggle_ext_start)(struct fsldma_chan *fsl_chan, int enable);