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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-06-19 00:45:34 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-06-20 00:49:06 +0200 |
| commit | b9e95fc65ededbec083aa91b4faa58ad992c0891 (patch) | |
| tree | 9f2b2867d14e6ad7b6a3cef1a2a776518ae83517 /include/acpi/acpi_bus.h | |
| parent | 6ee22e9d59151550a55d370b14109bdae8b58bda (diff) | |
| download | linux-b9e95fc65ededbec083aa91b4faa58ad992c0891.tar.gz linux-b9e95fc65ededbec083aa91b4faa58ad992c0891.tar.bz2 linux-b9e95fc65ededbec083aa91b4faa58ad992c0891.zip | |
ACPI / LPSS: Power up LPSS devices during enumeration
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>
Diffstat (limited to 'include/acpi/acpi_bus.h')
| -rw-r--r-- | include/acpi/acpi_bus.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index 636c59f2003a..c13c919ab99e 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -382,6 +382,7 @@ const char *acpi_power_state_string(int state); int acpi_device_get_power(struct acpi_device *device, int *state); int acpi_device_set_power(struct acpi_device *device, int state); int acpi_bus_init_power(struct acpi_device *device); +int acpi_device_fix_up_power(struct acpi_device *device); int acpi_bus_update_power(acpi_handle handle, int *state_p); bool acpi_bus_power_manageable(acpi_handle handle); |