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| author | Micky Ching <micky_ching@realsil.com.cn> | 2014-06-06 11:05:45 +0400 |
|---|---|---|
| committer | Lee Jones <lee.jones@linaro.org> | 2014-07-09 17:17:15 +0400 |
| commit | 6291e7153a173f85bbdb13bf0c72fa11b5d74bc0 (patch) | |
| tree | a7978fb796293d5d9a98c1d76d65936987f27567 /drivers/spi/spi-sh-sci.c | |
| parent | 8cd118308a8649c649533a0133af0ce731d223bb (diff) | |
| download | linux-6291e7153a173f85bbdb13bf0c72fa11b5d74bc0.tar.xz | |
mmc: rtsx: add support for async request
Add support for non-blocking request, pre_req() runs dma_map_sg() and
post_req() runs dma_unmap_sg(). This patch can increase card read/write
speed, especially for high speed card and slow speed CPU.
Test on intel i3(800MHz - 2.3GHz) performance mode(2.3GHz), SD card
clock 208MHz
run dd if=/dev/mmcblk0 of=/dev/null bs=64k count=1024
before:
67108864 bytes (67 MB) copied, 0.85427 s, 78.6 MB/s
after:
67108864 bytes (67 MB) copied, 0.74799 s, 89.7 MB/s
Signed-off-by: Micky Ching <micky_ching@realsil.com.cn>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'drivers/spi/spi-sh-sci.c')
0 files changed, 0 insertions, 0 deletions