| # Copyright (c) 2014 The Chromium OS Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| """Driver for power_state for x86-alex boards, and derivatives. |
| """ |
| import time |
| |
| import power_state |
| |
| |
| class alexPower(power_state.PowerStateDriver): |
| # Time in seconds to allow the firmware to initialize itself and |
| # present the "INSERT" screen in recovery mode before actually |
| # inserting a USB stick to boot from. |
| _RECOVERY_INSERT_DELAY = 10.0 |
| |
| def _power_off(self): |
| self._cold_reset() |
| |
| def _power_on(self, rec_mode): |
| self._interface.set('rec_mode', rec_mode) |
| self._interface.power_short_press() |
| if rec_mode == self.REC_ON: |
| time.sleep(self._RECOVERY_INSERT_DELAY) |
| self._interface.set('rec_mode', self.REC_OFF) |
| |
| def _reset_cycle(self): |
| # Use _power_off() rather than _cold_reset() directly |
| # for the sake of Stumpy, which inherits this method. |
| self._power_off() |
| self._power_on(self.REC_OFF) |
