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