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/* 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.
*
* power_button.h - Power button function.
* Hides chip-specific implementation behind this interface.
*/
#ifndef __CHIP_INTERFACE_AC_PRESENT_H
#define __CHIP_INTERFACE_AC_PRESENT_H
/*
* Initialize the AC present as GPIO input pin and enable interrupt for
* callback.
*/
EcError EcAcPresentInit(void);
/* Calls GPIOPinRead() to read the GPIO state. */
/* TODO: has the state been debounced? */
EcError EcAcPrensentState(void);
/* Register a calback function. It is called while AC is plugged in or
* unplugged.
*/
EcError EcAcPresentRegister(void (*callback)(void));
/* Below is the example code to register this function. */
#if 0
/* This callback function is implemented in Chrome OS features layer. */
void CrAcStateChanged(void) {
int ac_present = CrAcPrensentState();
if (ac_present) {
if (battery_present && authenticated) {
// start to charge battery;
}
} else {
// stop charge battery;
}
}
... somewhere in init code ...
CrAcPresentRegister(CrACStateChanged);
#endif /* #if 0 */
#endif /* __CHIP_INTERFACE_AC_PRESENT_H */
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