diff options
Diffstat (limited to 'chip_interface/ec_gpio.h')
| -rw-r--r-- | chip_interface/ec_gpio.h | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/chip_interface/ec_gpio.h b/chip_interface/ec_gpio.h new file mode 100644 index 0000000000..9f4f5ba81f --- /dev/null +++ b/chip_interface/ec_gpio.h @@ -0,0 +1,37 @@ +/* Copyright (c) 2011 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. + */ + +/* GPIO module for Chrome EC */ + +#ifndef __CROS_EC_GPIO_H +#define __CROS_EC_GPIO_H + +#include "ec_common.h" + +/* GPIO signal definitions. */ +typedef enum EcGpioSignal { + /* Firmware write protect */ + EC_GPIO_WRITE_PROTECT = 0, + /* Recovery switch */ + EC_GPIO_RECOVERY_SWITCH, + /* Debug LED */ + EC_GPIO_DEBUG_LED +} EcGpioSignal; + + +/* Initializes the GPIO module. */ +EcError EcGpioInit(void); + +/* Functions should return an error if the requested signal is not + * supported / not present on the board. */ + +/* Gets the current value of a signal (0=low, 1=hi). */ +EcError EcGpioGet(EcGpioSignal signal, int* value_ptr); + +/* Sets the current value of a signal. Returns error if the signal is + * not supported or is an input signal. */ +EcError EcGpioSet(EcGpioSignal signal, int value); + +#endif /* __CROS_EC_GPIO_H */ |