Randall Spangler e2f8466997 Handle bus errors on thermal I2C bus ...

1) Properly report I2C errors on TMP006 as error, not device-not-powered.

2) Treat clock timeout and bus-busy I2C status as error (previously ignored).

3) If clock timeout or bus-busy, reset I2C master for that bus to clear the
error.

These should help with systems where the thermal I2C bus gets into a
weird state on suspend/resume.

BUG=chrome-os-partner:16262
BRANCH=link

TEST=boot system; 'battery' and 'temps' should give good info
Then run snanda's suspend_stress_test for a while and repeat.

Change-Id: I534be8236a4d6de82575fe6d33a68502ce0a3a95
Original-Change-Id: Iec5d6bbd357d2e5eb3dc3d361c829f353e996ab6
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/38444
Reviewed-on: https://gerrit.chromium.org/gerrit/38659
Reviewed-by: Yung-Chieh Lo <yjlou@chromium.org>

2012-11-26 14:49:49 -08:00

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