results for GPS/uSD-"fix" via uSDclk-throttling

Joerg Reisenweber joerg at openmoko.org
Sun Aug 16 19:49:01 CEST 2009


[Joerg Reisenweber So  16. August 2009]:
> device rev: A7
> hw-fix (cap on uSD): by default
> 
> dd if=/dev/mmcblk0p1 of=/dev/null -> 
> sat sig drop: ~5dB
> during dd
> 
> echo 1 >/sys/module/glamo_mci/parameters/sd_slow_ratio
> dd...
> sat sig drop: ~4dB
> 
> conclusion:
> Don't want /sys/module/glamo_mci/parameters/sd_slow_ratio=8 for A7
> 

ps:
1 : 1.4 .. 1.9MB/s (bs=20M)
8 + GPS: 680KB/s (bs=20M)
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