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dw_dmac: Pass Channel Allocation Order from platform_data

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In SPEAr Platform channels 4-7 have more Fifo depth. So we must get better
channel first. This patch introduces concept of channel allocation order in
dw_dmac. If user doesn't pass anything or 0, than normal (ascending) channel
allocation will follow, else channels will be allocated in descending order.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Viresh Kumar
2011-03-03 15:47:21 +05:30
committed by Vinod Koul
parent e518076ef8
commit b0c3130d69
2 changed files with 8 additions and 1 deletions
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3
include/linux/dw_dmac.h
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@ -22,6 +22,9 @@
struct dw_dma_platform_data {
unsigned int nr_channels;
bool is_private;
#define CHAN_ALLOCATION_ASCENDING 0 /* zero to seven */
#define CHAN_ALLOCATION_DESCENDING 1 /* seven to zero */
unsigned char chan_allocation_order;
};
/**