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Power up inhibit is intended to stop the AP from booting when the battery is in certain states. It works most of the time, but sometimes IN_PCH_SLP_S5_DEASSERTED is already set by the time we get to S5 and we incorrectly boot the AP. Thinking about this more, it's better to check the battery state in G3, before we transition to S5, to prevent the needless transition back to G3 if power up is indeed inhibited. BUG=chrome-os-partner:35182 TEST=Manual on Samus. Drain battery to 1% and attach charger. Press power button multiple times and verify that AP doesn't boot. Charge better to 2% and press power button. Verify that AP boots. BRANCH=Samus Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org> Change-Id: Ib03c3f707f9d90d0a9cb07ada3738d00e2728c32 Reviewed-on: https://chromium-review.googlesource.com/239352 Reviewed-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-by: Alec Berg <alecaberg@chromium.org>