linux/include/acpi
Rafael J. Wysocki 7b1998116b ACPI / driver core: Store an ACPI device pointer in struct acpi_dev_node
Modify struct acpi_dev_node to contain a pointer to struct acpi_device
associated with the given device object (that is, its ACPI companion
device) instead of an ACPI handle corresponding to it.  Introduce two
new macros for manipulating that pointer in a CONFIG_ACPI-safe way,
ACPI_COMPANION() and ACPI_COMPANION_SET(), and rework the
ACPI_HANDLE() macro to take the above changes into account.
Drop the ACPI_HANDLE_SET() macro entirely and rework its users to
use ACPI_COMPANION_SET() instead.  For some of them who used to
pass the result of acpi_get_child() directly to ACPI_HANDLE_SET()
introduce a helper routine acpi_preset_companion() doing an
equivalent thing.

The main motivation for doing this is that there are things
represented by struct acpi_device objects that don't have valid
ACPI handles (so called fixed ACPI hardware features, such as
power and sleep buttons) and we would like to create platform
device objects for them and "glue" them to their ACPI companions
in the usual way (which currently is impossible due to the
lack of valid ACPI handles).  However, there are more reasons
why it may be useful.

First, struct acpi_device pointers allow of much better type checking
than void pointers which are ACPI handles, so it should be more
difficult to write buggy code using modified struct acpi_dev_node
and the new macros.  Second, the change should help to reduce (over
time) the number of places in which the result of ACPI_HANDLE() is
passed to acpi_bus_get_device() in order to obtain a pointer to the
struct acpi_device associated with the given "physical" device,
because now that pointer is returned by ACPI_COMPANION() directly.
Finally, the change should make it easier to write generic code that
will build both for CONFIG_ACPI set and unset without adding explicit
compiler directives to it.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com> # on Haswell
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Aaron Lu <aaron.lu@intel.com> # for ATA and SDIO part
2013-11-14 23:14:43 +01:00
..
platform Merge branch 'acpi-hotplug' 2013-11-07 19:31:15 +01:00
acbuffer.h ACPICA: Update ACPICA copyrights to 2013 2013-01-25 13:30:47 +01:00
acconfig.h ACPICA: Simplify configuration of global ACPI_REDUCED_HARDWARE macro. 2013-10-31 14:35:49 +01:00
acexcep.h ACPICA: Cleanup exception codes. 2013-09-24 01:46:25 +02:00
acnames.h ACPICA: Predefine name macros: Sort list. 2013-10-30 12:24:21 +01:00
acoutput.h ACPICA: Remove unused macros, no functional change 2013-06-01 21:54:31 +02:00
acpi.h ACPICA: Update ACPICA copyrights to 2013 2013-01-25 13:30:47 +01:00
acpi_bus.h ACPI / driver core: Store an ACPI device pointer in struct acpi_dev_node 2013-11-14 23:14:43 +01:00
acpi_drivers.h ACPI / dock / PCI: Drop ACPI dock notifier chain 2013-07-15 01:33:12 +02:00
acpi_numa.h ACPI: Store SRAT table revision 2012-01-17 04:19:04 -05:00
acpiosxf.h ACPI / hotplug: Consolidate deferred execution of ACPI hotplug routines 2013-11-07 19:28:48 +01:00
acpixf.h ACPICA: Add __init for ACPICA initializers/finalizers. 2013-10-31 14:37:36 +01:00
acrestyp.h ACPICA: Update ACPICA copyrights to 2013 2013-01-25 13:30:47 +01:00
actbl.h ACPICA: Update RSDP table definitions. 2013-10-31 14:37:32 +01:00
actbl1.h ACPI, CPER: Update cper info 2013-10-21 15:12:00 -07:00
actbl2.h ACPICA: Update DMAR table definitions. 2013-10-31 14:37:32 +01:00
actbl3.h ACPICA: Remove trailing comma in enum declarations 2013-03-12 00:45:05 +01:00
actypes.h ACPICA: Update acpidump related header file changes. 2013-10-31 14:37:35 +01:00
apei.h module_param: make bool parameters really bool (drivers & misc) 2012-01-13 09:32:20 +10:30
button.h
ghes.h ACPI, CPER: Update cper info 2013-10-21 15:12:00 -07:00
hed.h
pdc_intel.h
processor.h ACPI / processor: Do not request ACPI cpufreq module directly 2013-10-30 00:00:30 +01:00
reboot.h
video.h Revert "ACPI / video / i915: No ACPI backlight if firmware expects Windows 8" 2013-07-26 14:59:20 +02:00