dmaengine: core: expose max burst capability to clients

This patch add max_burst to dma_get_slave_caps for clients
to get the burst capability of slave dma controller.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index 16a1cad30c33..0a9a0ba1998b 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -401,6 +401,7 @@ enum dma_residue_granularity {
  *      since the enum dma_transfer_direction is not defined as bits for each
  *      type of direction, the dma controller should fill (1 << <TYPE>) and same
  *      should be checked by controller as well
+ * @max_burst: max burst capability per-transfer
  * @cmd_pause: true, if pause and thereby resume is supported
  * @cmd_terminate: true, if terminate cmd is supported
  * @residue_granularity: granularity of the reported transfer residue
@@ -411,6 +412,7 @@ struct dma_slave_caps {
         u32 src_addr_widths;
         u32 dst_addr_widths;
         u32 directions;
+        u32 max_burst;
         bool cmd_pause;
         bool cmd_terminate;
         enum dma_residue_granularity residue_granularity;
@@ -654,6 +656,7 @@ struct dma_filter {
  *      the enum dma_transfer_direction is not defined as bits for
  *      each type of direction, the dma controller should fill (1 <<
  *      <TYPE>) and same should be checked by controller as well
+ * @max_burst: max burst capability per-transfer
  * @residue_granularity: granularity of the transfer residue reported
  *      by tx_status
  * @device_alloc_chan_resources: allocate resources and return the
@@ -712,6 +715,7 @@ struct dma_device {
         u32 src_addr_widths;
         u32 dst_addr_widths;
         u32 directions;
+        u32 max_burst;
         bool descriptor_reuse;
         enum dma_residue_granularity residue_granularity;