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authorViresh Kumar <viresh.kumar@st.com>2011-03-04 15:42:50 +0530
committerVinod Koul <vinod.koul@intel.com>2011-03-07 01:12:27 +0530
commit418e74070662e1ae7d9bb5202f773d35c9a7f05e (patch)
tree23bd64f0d62af665ae69b67f608cb416e60e16ea /drivers/dma
parenta02274564dd78f7edde3c9ff197ed44f2f8a5a81 (diff)
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dw_dmac: Change value of DWC_MAX_COUNT to 4095.
Every descriptor can transfer a maximum count of 4095 (12 bits, in control reg), So we must have DWC_MAX_COUNT as 4095 instead of 2048. Signed-off-by: Viresh Kumar <viresh.kumar@st.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/dw_dmac.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c
index e5d97bf..711ebe9 100644
--- a/drivers/dma/dw_dmac.c
+++ b/drivers/dma/dw_dmac.c
@@ -47,14 +47,13 @@
/*
* This is configuration-dependent and usually a funny size like 4095.
- * Let's round it down to the nearest power of two.
*
* Note that this is a transfer count, i.e. if we transfer 32-bit
- * words, we can do 8192 bytes per descriptor.
+ * words, we can do 16380 bytes per descriptor.
*
* This parameter is also system-specific.
*/
-#define DWC_MAX_COUNT 2048U
+#define DWC_MAX_COUNT 4095U
/*
* Number of descriptors to allocate for each channel. This should be
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