linux-toradex.git/include/linux/acpi.h, branch v3.0.16

ACPI EC: remove dead code

2011-04-01T06:24:31+00:00

static void acpi_ec_gpe_query(void *ec_cxt);
-> The function is right above this declaration -> not needed.

poll_force is also not used, cleaned up in ec.c and its users:
compal-laptop and msi-laptop.

Signed-off-by: Thomas Renninger 
Signed-off-by: Len Brown

ACPI: Introduce acpi_os_ioremap()

2011-01-21T02:30:17+00:00

Commit ca9b600be38c ("ACPI / PM: Make suspend_nvs_save() use
acpi_os_map_memory()") attempted to prevent the code in osl.c and nvs.c
from using different ioremap() variants by making the latter use
acpi_os_map_memory() for mapping the NVS pages.  However, that also
requires acpi_os_unmap_memory() to be used for unmapping them, which
causes synchronize_rcu() to be executed many times in a row
unnecessarily and introduces substantial delays during resume on some
systems.

Instead of using acpi_os_map_memory() for mapping the NVS pages in nvs.c
introduce acpi_os_ioremap() calling ioremap_cache() and make the code in
both osl.c and nvs.c use it.

Reported-by: Jeff Chua 
Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Linus Torvalds

ACPI / PM: Fix build problems for !CONFIG_ACPI related to NVS rework

2011-01-12T21:11:30+00:00

The recent rework of the NVS saving/restoring code introduced two
build issues for !CONFIG_ACPI, a warning in drivers/acpi/internal.h
and an error in arch/x86/kernel/e820.c.

Fix them by providing suitable static inline definitions of the
relevant functions.

Signed-off-by: Rafael J. Wysocki 
Acked-by: Randy Dunlap 
Signed-off-by: Len Brown

PM / ACPI: Move NVS saving and restoring code to drivers/acpi

2011-01-07T05:36:55+00:00

The saving of the ACPI NVS area during hibernation and suspend and
restoring it during the subsequent resume is entirely specific to
ACPI, so move it to drivers/acpi and drop the CONFIG_SUSPEND_NVS
configuration option which is redundant.

Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Len Brown

acpi: fix _OSI string setup regression

2010-12-11T06:28:58+00:00

commit b0ed7a91(ACPICA/ACPI: Add new host interfaces for _OSI suppor)
introduced a regression that _OSI string setup fails.

There are 2 paths to setup _OSI string.

DMI:
acpi_dmi_osi_linux -> set_osi_linux -> acpi_osi_setup -> copy _OSI
string to osi_setup_string

Boot command line:
acpi_osi_setup -> copy _OSI string to osi_setup_string

Later, acpi_osi_setup_late will be called to handle osi_setup_string.
If _OSI string is "Linux" or "!Linux", then the call path is,

acpi_osi_setup_late -> acpi_cmdline_osi_linux -> set_osi_linux ->
acpi_osi_setup -> copy _OSI string to osi_setup_string

This actually never installs _OSI string(acpi_install_interface not
called), but just copy the _OSI string to osi_setup_string.

This patch fixes the regression.

Reported-and-tested-by: Lukas Hejtmanek 
Signed-off-by: Lin Ming 
Signed-off-by: Len Brown

Merge branch 'misc' into release

2010-10-26T18:51:00+00:00

ACPI: Add interfaces for ioremapping/iounmapping ACPI registers

2010-10-25T03:26:23+00:00

Add remapping and unmapping interfaces for ACPI registers that are
backed by memory mapped I/O (MMIO).  These interfaces, along with
the MMIO remapping list, enable accesses of such registers from within
interrupt context.

ACPI Generic Address Structure (GAS) reference (ACPI's fixed/generic
hardware registers use the GAS format):
  ACPI Specification, Revision 4.0, Section 5.2.3.1, "Generic Address
  Structure".

Signed-off-by: Myron Stowe 
Signed-off-by: Len Brown

ACPI: remove dead code

2010-10-19T17:44:21+00:00

Found by running make namespacecheck on linux-next

Signed-off-by: Stephen Hemminger 
Signed-off-by: Len Brown

ACPI/PCI: Negotiate _OSC control bits before requesting them

2010-08-24T20:44:40+00:00

It is possible that the BIOS will not grant control of all _OSC
features requested via acpi_pci_osc_control_set(), so it is
recommended to negotiate the final set of _OSC features with the
query flag set before calling _OSC to request control of these
features.

To implement it, rework acpi_pci_osc_control_set() so that the caller
can specify the mask of _OSC control bits to negotiate and the mask
of _OSC control bits that are absolutely necessary to it.  Then,
acpi_pci_osc_control_set() will run _OSC queries in a loop until
the mask of _OSC control bits returned by the BIOS is equal to the
mask passed to it.  Also, before running the _OSC request
acpi_pci_osc_control_set() will check if the caller's required
control bits are present in the final mask.

Using this mechanism we will be able to avoid situations in which the
BIOS doesn't grant control of certain _OSC features, because they
depend on some other _OSC features that have not been requested.

Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Jesse Barnes

ACPI / Sleep: Allow the NVS saving to be skipped during suspend to RAM

2010-07-25T03:26:09+00:00

Commit 2a6b69765ad794389f2fc3e14a0afa1a995221c2
(ACPI: Store NVS state even when entering suspend to RAM) caused the
ACPI suspend code save the NVS area during suspend and restore it
during resume unconditionally, although it is known that some systems
need to use acpi_sleep=s4_nonvs for hibernation to work.  To allow
the affected systems to avoid saving and restoring the NVS area
during suspend to RAM and resume, introduce kernel command line
option acpi_sleep=nonvs and make acpi_sleep=s4_nonvs work as its
alias temporarily (add acpi_sleep=s4_nonvs to the feature removal
file).

Addresses https://bugzilla.kernel.org/show_bug.cgi?id=16396 .

Signed-off-by: Rafael J. Wysocki 
Reported-and-tested-by: tomas m 
Signed-off-by: Len Brown