ACPI / LPSS: Power up LPSS devices during enumeration

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Commit 7cd8407 (ACPI / PM: Do not execute _PS0 for devices without
_PSC during initialization) introduced a regression on some systems
with Intel Lynxpoint Low-Power Subsystem (LPSS) where some devices
need to be powered up during initialization, but their device objects
in the ACPI namespace have _PS0 and _PS3 only (without _PSC or power
resources).

To work around this problem, make the ACPI LPSS driver power up
devices it knows about by using a new helper function
acpi_device_fix_up_power() that does all of the necessary
sanity checks and calls acpi_dev_pm_explicit_set() to put the
device into D0.

Reported-and-tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

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This commit is contained in:

Rafael J. Wysocki 2013-06-19 00:45:34 +02:00

parent 6ee22e9d59

commit b9e95fc65e

3 changed files with 36 additions and 6 deletions

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21

drivers/acpi/acpi_lpss.c

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20

drivers/acpi/device_pm.c

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1

include/acpi/acpi_bus.h

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