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/* power_button.h - Power button function.
* Hides chip-specific implementation behind this interface.
*
* (Chromium license) */
#ifndef __CHIP_INTERFACE_BATTERY_H
#define __CHIP_INTERFACE_BATTERY_H
/*********** Battery SMBus *********************************************/
/* Initialize the SMBus */
EcError CrBatteryInit(void);
/* Send a command to battery. Blocking */
EcError CrBatterySendCommand(...);
/* non-blocking read so that it can support both polling mode
* and interrupt callback.
*/
EcError CrBatteryRecvCommand(...);
/* Register a callback when a packet comes from SMBus */
EcError CrRegisterBatteryInterrupt(void (*isr)(...));
#if 0 /* example code */
void BatteryPacketArrive(...) {
CrBatteryRecvCommand(); // read the packet.
}
... somewhere in code ...
CrRegisterBatteryInterrupt(BatteryPacketArrive);
#endif
/*********** Battery Present *********************************************/
/*
* Initialize the battery present as GPIO input pin and enable interrupt for
* callback.
*/
EcError CrBatteryPresentInit(void);
/* Calls GPIOPinRead() to read the GPIO state. */
/* TODO: has the state been debounced? */
EcError CrBatteryPrensentState(void);
/* Register a calback function. It is called while AC is plugged in or
* unplugged.
*/
EcError CrBatteryPresentRegister(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 BatteryStateChanged(void) {
int battery_present = CrBatteryPresentState();
if (battery_present) {
// start to authenticate battery;
// once authenticated, charge the battery;
} else {
// stop charge battery;
}
}
... somewhere in init code ...
CrBatteryPresentRegister(BatteryStateChanged);
#endif /* #if 0 */
#endif /* __CHIP_INTERFACE_BATTERY_H */
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