[coreboot] Power supply and X220

[Matt DeVillier]

On Tue, Mar 21, 2017 at 8:56 AM, Felix Held <felix-coreboot at felixheld.de>
wrote:

> For a x220 the 3,3V regulator on the BBB likely doesn't supply enough
> current, since the Thinkpads usually don't have a diode in the power supply
> line of the SPI flash and so you power part of the board when you apply the
> 3,3V to the flash chip
>

I just flashed an x220 for someone a week or so back, had no issues with
using just the 3.3v from the BBB (which was powered via 5v DC input).  I
did have to connect WP/HOLD (pins 3/7) to 3.3v as well though, IIRC.
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