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bdf7da5b08
source files mainly done by Randall. Signed-off-by: Randall Spangler <rspangler@chromium.org> Change-Id: Iaff83a842b17f3350fb6f2a3f1597ad4c29bd12a
42 lines
1.0 KiB
C
42 lines
1.0 KiB
C
/* Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* GPIO module for Chrome EC */
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#ifndef __CROS_EC_GPIO_H
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#define __CROS_EC_GPIO_H
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#include "common.h"
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/* GPIO signal definitions. */
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enum gpio_signal {
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/* Firmware write protect */
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EC_GPIO_WRITE_PROTECT = 0,
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/* Recovery switch */
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EC_GPIO_RECOVERY_SWITCH,
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/* Debug LED */
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EC_GPIO_DEBUG_LED
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};
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/* Pre-initializes the module. This occurs before clocks or tasks are
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* set up. */
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int gpio_pre_init(void);
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/* Initializes the GPIO module. */
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int gpio_init(void);
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/* Functions should return an error if the requested signal is not
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* supported / not present on the board. */
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/* Gets the current value of a signal (0=low, 1=hi). */
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int gpio_get(enum gpio_signal signal, int *value_ptr);
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/* Sets the current value of a signal. Returns error if the signal is
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* not supported or is an input signal. */
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int gpio_set(enum gpio_signal signal, int value);
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#endif /* __CROS_EC_GPIO_H */
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