| # Copyright 2015 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. |
| import time |
| |
| import cros_ec_softrec_power |
| |
| |
| class samusPower(cros_ec_softrec_power.crosEcSoftrecPower): |
| |
| """Driver for power_state for Samus.""" |
| |
| def _cold_reset(self): |
| """Apply cold reset to the DUT. |
| |
| This asserts, then de-asserts the 'cold_reset' signal and the |
| 'usbpd_reset' signal. Samus varies from the generic implementation |
| in that the extra 'usbpd_reset' signal must be asserted to reset |
| the PD MCU. |
| |
| """ |
| self._interface.set('cold_reset', 'on') |
| self._interface.set('usbpd_reset', 'on') |
| |
| time.sleep(self._reset_hold_time) |
| |
| self._interface.set('cold_reset', 'off') |
| self._interface.set('usbpd_reset', 'off') |
| # After the reset, give the EC the time it needs to |
| # re-initialize. |
| time.sleep(self._reset_recovery_time) |
