c043ecf9e1
The current code does hazardous tweaks to the power subsystem: indeed if one boots with USB plugged and some stub powers on the DCDC switch, it will fail. Indeed, a hardware bug prevents from going back to linear regulators (see errata) so we cannot expect to reach a known state (linreg on, dcdc off) on each configuration and in particular, powering down the 4p2 rail in such a configuration will result in a power brownout. This commit works around this issue by not touching the initial power configuration until USB is (un)plugged, which are the best spots to get known states. Change-Id: I8741a3995df8ae61ca1c887a3ecb7903d0ac5136 |
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