Although
acpismbus SMBus Alerts can be associated with individual devices, this capability is ignored. When an
acpismbus SMBus Alert is generated, all devices on the i2c bus segment which have registered an interrupt routine are notified.
The SMBus CMI protocol defines a method to provide a list of devices on an i2c bus segment and their addresses. The
acpismbus driver makes no attempt to retrieve or process this device list.
There is currently no way to determine if the i2c controller managed by an instance of the ACPI SMBus CMI can also be accessed using a native device driver. Therefore, the
acpismbus driver should not be enabled by default. If both a native driver and the
acpismbus driver attempt to access the same i2c bus segment, the results are undefined.