mmc: code cleanup and support DDR mode
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b4 am 20140402085122.2109d6af@amdc2363Versions newest first
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Patches in v2 No applies recorded yet
None of the 10 patches the cover letter announces are in this archive.
Reviews trailers per patch
| Patch | Lukasz Majewski |
|---|---|
| Series | T-b A-b |
Trailers given in replies are filled; those carried in the patches from earlier versions are outlined with dashes.
Cover letter [U-Boot] [PATCHv2 00/10] mmc: code cleanup and support DDR mode
Hi Jaehoon,
Quoted 16 lines
If card and host are supported DDR mode, then it can be used the DDR mode. This patch-set has dependency about beomho's patch-set. (Based-on u-boot-samsung repository)
http://patchwork.ozlabs.org/patch/331986/
http://patchwork.ozlabs.org/patch/331987/
http://patchwork.ozlabs.org/patch/331989/
http://patchwork.ozlabs.org/patch/331988/It's result for loading image.
sdhci controller ->5260488 bytes read in 259 ms (19.4 MiB/s) dwmmc controller without DDR mode -> 5260488 bytes read in 202 ms (24.8 MiB/s) dwmmc controller with DDR mode -> 5260488 bytes read in 118 ms (42.5 MiB/s)
Quoted 4 lines
Download the 400M image with lthor.
sdhci controller -> 59.4sec (Avg 6.95 MB/s)
dwmmc controller without DDR mode -> 61.6sec (Avg 6.72MB/s) dwmmc controller with DDR mode -> 60.4sec (Avg 6.85MB/s)
With downloading we aren't observing time improvement for downloading the test image and flashing it, because of the time consuming crc32 calculation.
After applying the patch:
http://patchwork.ozlabs.org/patch/335223/
The time itself reduces significantly to less than 20 seconds.
In spite of the above I've tested this patch set on Trats2, so
Signature · 5 lines
Best regards, Lukasz Majewski Samsung R&D Institute Poland (SRPOL) | Linux Platform Group