linux-stable.git/drivers/acpi, branch v3.18.28

ACPI / init: Switch over platform to the ACPI mode later

2015-08-27T17:25:39+00:00

[ Upstream commit cdbbeb69d4b93455a73edff725639216d7fe0b38 ]

commit b064a8fa77dfead647564c46ac8fc5b13bd1ab73 upstream.

Commit 73f7d1ca3263 "ACPI / init: Run acpi_early_init() before
timekeeping_init()" moved the ACPI subsystem initialization,
including the ACPI mode enabling, to an earlier point in the
initialization sequence, to allow the timekeeping subsystem
use ACPI early.  Unfortunately, that resulted in boot regressions
on some systems and the early ACPI initialization was moved toward
its original position in the kernel initialization code by commit
c4e1acbb35e4 "ACPI / init: Invoke early ACPI initialization later".

However, that turns out to be insufficient, as boot is still broken
on the Tyan S8812 mainboard.

To fix that issue, split the ACPI early initialization code into
two pieces so the majority of it still located in acpi_early_init()
and the part switching over the platform into the ACPI mode goes into
a new function, acpi_subsystem_init(), executed at the original early
ACPI initialization spot.

That fixes the Tyan S8812 boot problem, but still allows ACPI
tables to be loaded earlier which is useful to the EFI code in
efi_enter_virtual_mode().

Link: https://bugzilla.kernel.org/show_bug.cgi?id=97141
Fixes: 73f7d1ca3263 "ACPI / init: Run acpi_early_init() before timekeeping_init()"
Reported-and-tested-by: Marius Tolzmann 
Signed-off-by: Rafael J. Wysocki 
Acked-by: Toshi Kani 
Reviewed-by: Hanjun Guo 
Reviewed-by: Lee, Chun-Yi 
Signed-off-by: Greg Kroah-Hartman 
Signed-off-by: Sasha Levin

ACPICA: Tables: Fix an issue that FACS initialization is performed twice

2015-08-04T18:33:56+00:00

[ Upstream commit c04be18448355441a0c424362df65b6422e27bda ]

ACPICA commit 90f5332a15e9d9ba83831ca700b2b9f708274658

This patch adds a new FACS initialization flag for acpi_tb_initialize().
acpi_enable_subsystem() might be invoked several times in OS bootup process,
and we don't want FACS initialization to be invoked twice. Lv Zheng.

Link: https://github.com/acpica/acpica/commit/90f5332a
Cc: All applicable  # All applicable
Signed-off-by: Lv Zheng 
Signed-off-by: Bob Moore 
Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Sasha Levin

ACPI / PM: Add missing pm_generic_complete() invocation

2015-07-04T03:02:26+00:00

[ Upstream commit 3d56402d3fa8d10749eeb36293dd1992bd5ad0c3 ]

Add missing invocation of pm_generic_complete() to
acpi_subsys_complete() to allow ->complete callbacks provided
by the drivers of devices using the ACPI PM domain to be executed
during system resume.

Fixes: f25c0ae2b4c4 (ACPI / PM: Avoid resuming devices in ACPI PM domain during system suspend)
Cc: 3.16+  # 3.16+
Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Sasha Levin

Driver core: Unified device properties interface for platform firmware

2015-06-28T17:39:20+00:00

[ Upstream commit b31384fa5de37a100507751dfb5c0a49d06cee67 ]

Add a uniform interface by which device drivers can request device
properties from the platform firmware by providing a property name
and the corresponding data type.  The purpose of it is to help to
write portable code that won't depend on any particular platform
firmware interface.

The following general helper functions are added:

device_property_present()
device_property_read_u8()
device_property_read_u16()
device_property_read_u32()
device_property_read_u64()
device_property_read_string()
device_property_read_u8_array()
device_property_read_u16_array()
device_property_read_u32_array()
device_property_read_u64_array()
device_property_read_string_array()

The first one allows the caller to check if the given property is
present.  The next 5 of them allow single-valued properties of
various types to be retrieved in a uniform way.  The remaining 5 are
for reading properties with multiple values (arrays of either numbers
or strings).

The interface covers both ACPI and Device Trees.

This change set includes material from Mika Westerberg and Aaron Lu.

Signed-off-by: Aaron Lu 
Signed-off-by: Mika Westerberg 
Acked-by: Greg Kroah-Hartman 
Acked-by: Grant Likely 
Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Sasha Levin

ACPI: Add support for device specific properties

2015-06-28T17:39:20+00:00

[ Upstream commit ffdcd955c3078af3ce117edcfce80fde1a512bed ]

Device Tree is used in many embedded systems to describe the system
configuration to the OS. It supports attaching properties or name-value
pairs to the devices it describe. With these properties one can pass
additional information to the drivers that would not be available
otherwise.

ACPI is another configuration mechanism (among other things) typically
seen, but not limited to, x86 machines. ACPI allows passing arbitrary
data from methods but there has not been mechanism equivalent to Device
Tree until the introduction of _DSD in the recent publication of the
ACPI 5.1 specification.

In order to facilitate ACPI usage in systems where Device Tree is
typically used, it would be beneficial to standardize a way to retrieve
Device Tree style properties from ACPI devices, which is what we do in
this patch.

If a given device described in ACPI namespace wants to export properties it
must implement _DSD method (Device Specific Data, introduced with ACPI 5.1)
that returns the properties in a package of packages. For example:

	Name (_DSD, Package () {
		ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
		Package () {
			Package () {"name1", },
			Package () {"name2", },
			...
		}
	})

The UUID reserved for properties is daffd814-6eba-4d8c-8a91-bc9bbf4aa301
and is documented in the ACPI 5.1 companion document called "_DSD
Implementation Guide" [1], [2].

We add several helper functions that can be used to extract these
properties and convert them to different Linux data types.

The ultimate goal is that we only have one device property API that
retrieves the requested properties from Device Tree or from ACPI
transparent to the caller.

[1] http://www.uefi.org/sites/default/files/resources/_DSD-implementation-guide-toplevel.htm
[2] http://www.uefi.org/sites/default/files/resources/_DSD-device-properties-UUID.pdf

Reviewed-by: Hanjun Guo 
Reviewed-by: Josh Triplett 
Reviewed-by: Grant Likely 
Signed-off-by: Darren Hart 
Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Mika Westerberg 
Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Sasha Levin

ACPI / init: Fix the ordering of acpi_reserve_resources()

2015-06-10T17:42:40+00:00

[ Upstream commit b9a5e5e18fbf223502c0b2264c15024e393da928 ]

Since acpi_reserve_resources() is defined as a device_initcall(),
there's no guarantee that it will be executed in the right order
with respect to the rest of the ACPI initialization code.  On some
systems this leads to breakage if, for example, the address range
that should be reserved for the ACPI fixed registers is given to
the PCI host bridge instead if the race is won by the wrong code
path.

Fix this by turning acpi_reserve_resources() into a void function
and calling it directly from within the ACPI initialization sequence.

Reported-and-tested-by: George McCollister 
Link: http://marc.info/?t=143092384600002&r=1&w=2
Cc: All applicable 
Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Sasha Levin

ACPICA: Utilities: Cleanup to remove useless ACPI_PRINTF/FORMAT_xxx helpers.

2015-06-09T17:43:42+00:00

[ Upstream commit 1d0a0b2f6df2bf2643fadc990eb143361eca6ada ]

ACPICA commit b60612373a4ef63b64a57c124576d7ddb6d8efb6

For physical addresses, since the address may exceed 32-bit address range
after calculation, we should use 0x%8.8X%8.8X instead of ACPI_PRINTF_UINT
and ACPI_FORMAT_UINT64() instead of
ACPI_FORMAT_NATIVE_UINT()/ACPI_FORMAT_TO_UINT().

This patch also removes above replaced macros as there are no users.

This is a preparation to switch acpi_physical_address to 64-bit on 32-bit
kernel builds.

Link: https://github.com/acpica/acpica/commit/b6061237
Signed-off-by: Lv Zheng 
Signed-off-by: Bob Moore 
Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Sasha Levin

ACPICA: Utilities: Cleanup to convert physical address printing formats.

2015-06-09T17:43:42+00:00

[ Upstream commit cc2080b0e5a7c6c33ef5e9ffccbc2b8f6f861393 ]

ACPICA commit 7f06739db43a85083a70371c14141008f20b2198

For physical addresses, since the address may exceed 32-bit address range
after calculation, we should use %8.8X%8.8X (see ACPI_FORMAT_UINT64()) to
convert the %p formats.

This is a preparation to switch acpi_physical_address to 64-bit on 32-bit
kernel builds.

Link: https://github.com/acpica/acpica/commit/7f06739d
Signed-off-by: Lv Zheng 
Signed-off-by: Bob Moore 
Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Sasha Levin

ACPICA: Utilities: Cleanup to enforce ACPI_PHYSADDR_TO_PTR()/ACPI_PTR_TO_PHYSADDR().

2015-06-09T17:43:41+00:00

[ Upstream commit 6d3fd3cc33d50e4c0d0c0bd172de02caaec3127c ]

ACPICA commit 154f6d074dd38d6ebc0467ad454454e6c5c9ecdf

There are code pieces converting pointers using "(acpi_physical_address) x"
or "ACPI_CAST_PTR (t, x)" formats, this patch cleans up them.

Known issues:
1. Cleanup of "(ACPI_PHYSICAL_ADDRRESS) x" for a table field
   For the conversions around the table fields, it is better to fix it with
   alignment also fixed. So this patch doesn't modify such code. There
   should be no functional problem by leaving them unchanged.

Link: https://github.com/acpica/acpica/commit/154f6d07
Signed-off-by: Lv Zheng 
Signed-off-by: Bob Moore 
Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Sasha Levin

ACPICA: Tables: Change acpi_find_root_pointer() to use acpi_physical_address.

2015-06-09T17:43:41+00:00

[ Upstream commit f254e3c57b9d952e987502aefa0804c177dd2503 ]

ACPICA commit 7d9fd64397d7c38899d3dc497525f6e6b044e0e3

OSPMs like Linux expect an acpi_physical_address returning value from
acpi_find_root_pointer(). This triggers warnings if sizeof (acpi_size) doesn't
equal to sizeof (acpi_physical_address):
  drivers/acpi/osl.c:275:3: warning: passing argument 1 of 'acpi_find_root_pointer' from incompatible pointer type [enabled by default]
  In file included from include/acpi/acpi.h:64:0,
                   from include/linux/acpi.h:36,
                   from drivers/acpi/osl.c:41:
  include/acpi/acpixf.h:433:1: note: expected 'acpi_size *' but argument is of type 'acpi_physical_address *'
This patch corrects acpi_find_root_pointer().

Link: https://github.com/acpica/acpica/commit/7d9fd643
Signed-off-by: Lv Zheng 
Signed-off-by: Bob Moore 
Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Sasha Levin