[Bug 191] New: investigate if we can set CPU voltage to 1.8V on 200MHz or less
bugzilla-daemon at bugzilla.openmoko.org
bugzilla-daemon at bugzilla.openmoko.org
Fri Feb 16 18:37:46 CET 2007
http://bugzilla.openmoko.org/cgi-bin/bugzilla/show_bug.cgi?id=191
Summary: investigate if we can set CPU voltage to 1.8V on 200MHz
or less
Product: Neo1973 Hardware
Version: GTA01Bv2
Platform: Neo1973
OS/Version: Linux
Status: NEW
Severity: enhancement
Priority: P2
Component: Core System
AssignedTo: sean_chiang at fic.com.tw
ReportedBy: laforge at openmoko.org
The S3C2410 data sheet only specifies that the 266MHz CPU type requires 2.0V (we
run it at 2.1V), and the 200MHz variant requires 1.8V.
However, if we dynamically change the CPU speed of the 266MHz variant down to
200 (or below), can we safely reconfigure the voltage to 1.8V? If yes, this
would give us even more power savings than just reducing the clock rate by cpufreq.
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