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dmaengine: ste_dma40: Calculate number of logical channels from physical ones

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This change will cost ~25KB of memory, but it's worth the trade-off,
as it removes a great deal of overhead. It means that instead of only
allocating memory for the logical channels in use, it does so for all
available ones, which is 32 per physical channel. However, this now
means we can remove some platform data and we don't have to worry
about adding vendor specific variables to Device Tree.

Acked-by: Vinod Koul <vnod.koul@intel.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Lee Jones 2013-05-03 15:32:03 +01:00 • committed by Linus Walleij
commit db72da9210
3 changed files with 6 additions and 13 deletions
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2
include/linux/platform_data/dma-ste-dma40.h
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@ -136,7 +136,6 @@ struct stedma40_chan_cfg {
/**
* struct stedma40_platform_data - Configuration struct for the dma device.
*
* @dev_len: length of dev_tx and dev_rx
* @dev_tx: mapping between destination event line and io address
* @dev_rx: mapping between source event line and io address
* @disabled_channels: A vector, ending with -1, that marks physical channels
@ -153,7 +152,6 @@ struct stedma40_chan_cfg {
* for 'multiple of 4' channels, like 8.
*/
struct stedma40_platform_data {
u32 dev_len;
const dma_addr_t *dev_tx;
const dma_addr_t *dev_rx;
int disabled_channels[STEDMA40_MAX_PHYS];