Advanced Configuration and Power Interface Specification

Power Source and Power Meter Devices
10.1.3.1 Example: Single Smart Battery Subsystem
This section illustrates how to define a Smart Battery subsystem containing a single Smart Battery
and charger. The platform implementation is illustrated below:
Embedded
Controller
Ports: 0x62, 0x66
Offset: 0x80
Query: 0x30
SBS
Battery
0xB
Host
Interface
SMBus
Host
Controller
(0x8)
SMBus
SBS
Charger
0x9
Figure 10-60 Single Smart Battery Subsystem
In this example, the platform is using an SMB-HC that resides within the embedded controller and
meets the ACPI standard for an embedded controller interface and SMB-HC interface. The
embedded controller interface sits at system I/O port addresses 0x62 and 0x66. The SMB-HC is at
base address 0x80 within embedded controller address space (as defined by the ACPI embedded
controller specification) and responds to events on query value 0x30.
In this example the Smart Battery subsystem only supports a single Smart Battery. The ASL code for
describing this interface is shown below:
Device (EC0) {
Name (_HID, EISAID("PNP0C09"))
Name (_CRS,
ResourceTemplate () {
// port 0x62 and 0x66
IO (Decode16, 0x62, 0x62, 0, 1),
IO (Decode16, 0x66, 0x66, 0, 1)
}
)
Name (_GPE, 0)
Device (SMB0) {
Name (_HID, "ACPI0001")
// Smart Battery Host Controller
Name (_EC, 0x8030)
// EC offset (0x80), Query (0x30)
Device (SBS0){
// Smart Battery Subsystem
Name (_HID, "ACPI0002") // Smart Battery Subsystem ID
Name(_SBS, 0x1)
// Indicates support for one battery
} // end of SBS0
} // end of SMB0
} // end of EC
10.1.3.2 Multiple Smart Battery Subsystem: Example
This section illustrates how to define a Smart Battery subsystem that contains three Smart Batteries,
a Smart Battery System Manager, and a Smart Battery Charger. The platform implementation is
illustrated below:
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