[PATCH 4/4] use-gta02-glamo-mci-sd-dynamic-clock.patch

Andy Green andy at openmoko.com
Thu Jul 31 11:06:58 CEST 2008

Hash: SHA1

Somebody in the thread at some point said:
| Carl-Daniel Hailfinger wrote:
|> On 30.07.2008 13:52, Andy Green wrote:
|>> This patch uses the new glamo-mci slow clock ratio
|>> patch in order to dynamically reduce SD Card clock
|>> rate when the GPS unit is powered on GTA02.
|>> Signed-off-by: Andy Green <andy at openmoko.com>
|> This means an unconditional 8x slowdown if GPS is on. Wouldn't it be
|> better to trigger the slowdown before the GPS tries to acquire a first
|> fix and scale the clock back up after a first fix has been acquired?
|> Regards,
|> Carl-Daniel
| Better yet, don't slow the clock down unless it affects reliability of
| sdcard access. During normal operation on a GTA02 I would expect sdcard
| access to be minimal unless playing media content. I'd prefer to have
| playback performance over GPS fix time.

I agree, elsewhere there are claims that pulling map tiles from SD Card
while interested in GPS results makes trouble.

Let's see if this done anything to that guy, if it does we can refine it
(although that's going to be a userspace job) if not we can bin it.

- -Andy
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