ACPI - battery state not probing

[Matthew Dillon]

    I'm getting this whenever I try to probe the battery state on my
    atom laptop now.  This used to work.  It now says that Battery 0 is
    not present.

acpi_ec0: EcRead: failed waiting to get data
ACPI Exception: AE_NO_HARDWARE_RESPONSE, Returned by Handler for [EmbeddedControl] (20110211/evregion-590)
ACPI Error: Method parse/execution failed [\\_SB_.PCI0.SBRG.EC0_.BST1] (Node 0xc2b075f4), AE_NO_HARDWARE_RESPONSE (20110211/psparse-632)
ACPI Error: Method parse/execution failed [\\_SB_.PCI0.CBST] (Node 0xc2b0b5e4), AE_NO_HARDWARE_RESPONSE (20110211/psparse-632)
ACPI Error: Method parse/execution failed [\\_SB_.PCI0.BAT0._BST] (Node 0xc2b0b464), AE_NO_HARDWARE_RESPONSE (20110211/psparse-632)

    The previous kernel was HEAD as of March 2nd.  Reading the battery
    state works in this kernel.  Full dmesg output here:

	http://apollo.backplane.com/DFlyMisc/laptop01.txt

    In the latest kernel the battery state is non-working:

	http://apollo.backplane.com/DFlyMisc/laptop02.txt

					-Matt