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A unit load is defined to be 100mA. The number of unit loads a device can draw is an absolute maximum, not an average over time. A device may be either low-power at one unit load or high-power, consuming up to five unit loads. All devices default to low-power. The transition to high-power is under software control. It is the responsibility of software to ensure adequate power is available before allowing devices to consume high-power.
The idea of an all-in-one was foreign before the the iMac
You mean, like the original Mac from 1984?
The Freescale chip in question is an ARM -- the i.MX31 (this driver is actually for the power management companion IC). Freescale does not and never has made low power x86 chips. In fact, being the spin-off of Motorola's semiconductor division and the home of the 68K processor line, they would probably find that suggestion offensive!