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/* lid.h - handle lid open/close
*
* (Chromium license) */
#ifndef __CHIP_INTERFACE_LID_H
#define __CHIP_INTERFACE_LID_H
/* Initialize the GPIO pin */
EcError CrLidSwitchInit(void);
/* Calls GPIOPinRead() to read the GPIO state. */
/* TODO: has the state been debounced? */
EcError CrLidSwitchState(void);
/* Register a calback function. It is called while lid state is changed.
*/
EcError CrLidSwitchRegister(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 LidSwitchChanged(void) {
int lid_open = CrLidSwitchState();
if (lid_open) {
if (system is in S3) {
// resume system
}
} else {
if (system is in S0) {
// suspend system
}
}
}
... somewhere in init code ...
CrLidSwitchRegister(LidSwitchChanged);
#endif
#endif /* __CHIP_INTERFACE_LID_H */
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