Jetson/Jetson TK1 Power
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Revision as of 21:22, 6 June 2014 by Shervin.emami (talk | contribs) (→Limiting power use: Rephrased the warning note.)
Contents
Limiting power use
Note: Debugfs and non-upstream sysfs nodes aren't guaranteed to remain unchanged in future releases.
Reducing power if display isn't required
As root:
echo -1 > /sys/kernel/debug/tegra_hdmi/hotplug echo 4 > /sys/class/graphics/fb0/blank
Restricting to low-power core only
Restricting the CPU to the low power companion core can significantly reduce peak power (if running on a power-limited battery pack, for example), though at lower performance. As root:
echo 0 > /sys/devices/system/cpu/cpuquiet/tegra_cpuquiet/enable echo LP > /sys/kernel/cluster/active
Powering with a battery
Slightly under-powered step-up converter
More powerful step-up converter
Both of these step-up converters will work either from a USB battery or directly off a LiPo battery. Note that most USB batteries can only produce 5V@2.1A ~= 10W at best, which is less than the TK1 draws at max power consumption.
