Advanced Configuration and Power Interface Specification

ACPI-Defined Devices and Device-Specific Objects
9.19.3 Example
Device(BTNS)
{
Name(_HID, “ACPI0011”)
Name(_CRS, ResourceTemplate() {
GpioInt(Edge, ActiveBoth…) {pin} //Vol Down
GpioInt(Edge, ActiveBoth…) {pin} //Vol Up
GpioInt(Edge, ActiveBoth,…) {pin} //Power (MUST BE
//ACTIVEBOTH!)
})
Name(_DSD, Package(2) {
//UUID for HID Button Descriptors:
ToUUID(“FA6BD625-9CE8-470D-A2C7-B3CA36C4282E”),
//Data structure for this UUID:
Package() {
Package(5) {
0, //Declare a Collection
1, //Unique ID for this collection
0, //It is a top-level collection
0x0c,//Usage Page (“Consumer”)
0x01 //Usage (“Consumer Control”)
},
Package(5) {
0, //Declare another Collection
2, //Unique ID for this collection
0, //Also a top-level collection
0x01,// Usage Page (”Generic Desktop”)
0x80 //Usage (“System Control”)
},
Package(5) {
1, //Declare a Control
0, //Interrupt index in _CRS for Vol Down
1, //In the “Consumer Control” collection
0x0c,//Usage Page (“Consumer”)
0xEA //Usage (“Volume Decrement”)
},
Package(5) {
1, //Declare another Control
2, //Interrupt index for the Power Button
2, //In the “System Control” collection
0x01,//Usage Page (”Generic Desktop”)
0x81 //Usage (“System Power Down”)
},
Package(5) {
1, //Declare another Control
1, //Interrupt index for the Vol Up button
1, //In the “Consumer Control” collection
0x0c,//Usage Page (“Consumer”)
0xE9 //Usage (“Volume Increment”)
},
Package(5) {
1, //Another Control
0xFF,//No Interrupt for this one… e.g. OS-
// specific signaling for Rotation Lock
1, //In the “Consumer Control” collection
0x0C,//Usage Page (“Consumer”)
0x245 //Usage (“AC Rotate”)
}
}
})
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