| # Copyright 2016 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 sx1506 16bit ioexpander, with power on defaults for for servo v4 |
| """ |
| import sx1506 |
| |
| |
| class sx1506V4(sx1506.sx1506): |
| """Object to access drv=sx1506_v4 controls. |
| |
| This class implements hardcoded defaults for servo v4's sx1506 io expander. |
| Since sx1506 doesn't export its internal state, and the GPIOs must be |
| preserved on init to keep servo_micro up, we need to hardocode here. |
| """ |
| |
| INIT_DATA = 0x0282 |
| INIT_DIR = 0x0000 |
| |
| def __init__(self, interface, params): |
| """Constructor.""" |
| super(sx1506V4, self).__init__(interface, params) |
