[Arm-netbook] Laptop PCB schematics

[Luke Kenneth Casson Leighton]

ok turns out - from what i am reading of the datasheets - that the bq24193
can cope with running from 3.3v, it looks like it doesn't mind: the limit
of the I2C and other pins is 6V.

the bq27542 is a different matter (i thought it was 1.8v, it's not: it's
2.5v).  it has its own 2.5v LDO on-board but the maximum input voltage is
2.5v for its I2C and HDQ (status / IRQ pin).  sooo what i've done is,
connect the 2.5v output (REG25) to the level-shifter, and the other side to
VREFTTL.

i updated the schematics pdfs.

l.
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