dw_dmac: autoconfigure block_size or use platform data

The maximum block size is a configurable parameter for the chip. So, driver
will try to get it from the encoded component parameters. Otherwise it will
come from the platform data.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/dw_dmac.h b/include/linux/dw_dmac.h
index 2412e02d7c0f..3315ef9c785b 100644
--- a/include/linux/dw_dmac.h
+++ b/include/linux/dw_dmac.h
@@ -19,6 +19,7 @@
  * @nr_channels: Number of channels supported by hardware (max 8)
  * @is_private: The device channels should be marked as private and not for
  *      by the general purpose DMA channel allocator.
+ * @block_size: Maximum block size supported by the controller
  */
 struct dw_dma_platform_data {
         unsigned int    nr_channels;
@@ -29,6 +30,7 @@ struct dw_dma_platform_data {
 #define CHAN_PRIORITY_ASCENDING         0       /* chan0 highest */
 #define CHAN_PRIORITY_DESCENDING        1       /* chan7 highest */
         unsigned char   chan_priority;
+        unsigned short  block_size;
 };
 
 /* bursts size */