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authorVinod Koul <vinod.koul@intel.com>2017-09-06 19:24:48 +0300
committerVinod Koul <vinod.koul@intel.com>2017-09-06 19:24:48 +0300
commit346ea25e811b1e260fde7a446aa18833ca7e7b79 (patch)
treef827832a9e99c6b489f14fd046254e3970449fce /Documentation
parent05890d550c3b0a8b4daae36ec1bd9fe193a584f9 (diff)
parent749d0d4bbb077e9a9e25a910e1cd285a0f0050ef (diff)
downloadlinux-346ea25e811b1e260fde7a446aa18833ca7e7b79.tar.xz
Merge branch 'topic/qcom' into for-linus
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/dmaengine/provider.txt7
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/dmaengine/provider.txt b/Documentation/dmaengine/provider.txt
index e33bc1c8ed2c..bfadbfdf13ed 100644
--- a/Documentation/dmaengine/provider.txt
+++ b/Documentation/dmaengine/provider.txt
@@ -395,6 +395,13 @@ where to put them)
when DMA_CTRL_REUSE is already set
- Terminating the channel
+ * DMA_PREP_CMD
+ - If set, the client driver tells DMA controller that passed data in DMA
+ API is command data.
+ - Interpretation of command data is DMA controller specific. It can be
+ used for issuing commands to other peripherals/register reads/register
+ writes for which the descriptor should be in different format from
+ normal data descriptors.
General Design Notes
--------------------