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3d0d2adb63
This works around a problem where disabling +5VALW glitches +3VALW_EC, which may cause the EC to brown out or hang. BUG=chrome-os-partner:16600 BRANCH=link TEST=manual 1. When the system boots, look for this line as the first x86 power state: [0.004977 x86 power state 0 = G3, in 0x0001] 2. Boot the system. Should boot normally. 3. Shut down the system using the power button. 4. After ~10 seconds, you should see that line of output again. 5. At the EC console: 'gpioget enable_5valw' should output: 1* ENABLE_5VALW This should ideally be combined with a hardware fix to add 30+ ms of delay to EC_EN_5V, since when the EC is reset via power+refresh that tri-states EC_EN_5V, and it takes ~22ms for the EC to boot and start driving EC_EN_5V again. Change-Id: Iba4d961d064105faf988a35c2277e9d7406e39e2 Signed-off-by: Randall Spangler <rspangler@chromium.org> Reviewed-on: https://gerrit.chromium.org/gerrit/39334 Reviewed-by: Yung-Chieh Lo <yjlou@chromium.org>