linux.git/drivers/acpi/bus.c, branch v4.13

Merge branches 'acpi-spcr', 'acpi-osi', 'acpi-bus', 'acpi-scan' and 'acpi-misc'

2017-07-10T20:46:21+00:00

* acpi-spcr:
  ACPI: SPCR: Workaround for APM X-Gene 8250 UART 32-alignment errata
  ACPI: SPCR: Use access width to determine mmio usage

* acpi-osi:
  ACPI / osi: Make local function acpi_osi_dmi_linux() static

* acpi-bus:
  ACPI / bus: handle ACPI hotplug schedule errors completely

* acpi-scan:
  ACPI / scan: Indicate to platform when hot remove returns busy

* acpi-misc:
  ACPI / DPTF: constify attribute_group structures
  ACPI / LPSS: constify attribute_group structures
  ACPI: BGRT: constify attribute_group structures
  ACPI / power: constify attribute_group structures

ACPI / bus: handle ACPI hotplug schedule errors completely

2017-07-04T19:38:53+00:00

Kernel should decrements the reference count of ACPI device
when the scheduling of ACPI hotplug work failed, and evaluates
_OST to notify BIOS the failure.

Reviewed-by: Andy Shevchenko 
Signed-off-by: "Lee, Chun-Yi" 
Signed-off-by: Rafael J. Wysocki

ACPI: Switch to use generic guid_t in acpi_evaluate_dsm()

2017-06-07T10:20:49+00:00

acpi_evaluate_dsm() and friends take a pointer to a raw buffer of 16
bytes. Instead we convert them to use guid_t type. At the same time we
convert current users.

acpi_str_to_uuid() becomes useless after the conversion and it's safe to
get rid of it.

Acked-by: Rafael J. Wysocki 
Cc: Borislav Petkov 
Acked-by: Dan Williams 
Cc: Amir Goldstein 
Reviewed-by: Jarkko Sakkinen 
Reviewed-by: Jani Nikula 
Acked-by: Jani Nikula 
Cc: Ben Skeggs 
Acked-by: Benjamin Tissoires 
Acked-by: Joerg Roedel 
Acked-by: Adrian Hunter 
Cc: Yisen Zhuang 
Acked-by: Bjorn Helgaas 
Acked-by: Felipe Balbi 
Acked-by: Mathias Nyman 
Reviewed-by: Heikki Krogerus 
Acked-by: Mark Brown 
Signed-off-by: Andy Shevchenko 
Signed-off-by: Christoph Hellwig

ACPI / bus: Switch to use new generic UUID API

2017-06-05T17:42:02+00:00

There are new types and helpers that are supposed to be used in new code.

As a preparation to get rid of legacy types and API functions do
the conversion here.

Acked-by: Rafael J. Wysocki 
Signed-off-by: Andy Shevchenko 
Signed-off-by: Christoph Hellwig

ACPI / bus: Introduce a list of ids for "always present" devices

2017-04-26T22:02:43+00:00

Several Bay / Cherry Trail devices (all of which ship with Windows 10) hide
the LPSS PWM controller in ACPI, typically the _STA method looks like this:

    Method (_STA, 0, NotSerialized)  // _STA: Status
    {
        If (OSID == One)
        {
            Return (Zero)
        }

        Return (0x0F)
    }

Where OSID is some dark magic seen in all Cherry Trail ACPI tables making
the machine behave differently depending on which OS it *thinks* it is
booting, this gets set in a number of ways which we cannot control, on
some newer machines it simple hardcoded to "One" aka win10.

This causes the PWM controller to get hidden, which means Linux cannot
control the backlight level on cht based tablets / laptops.

Since loading the driver for this does no harm (the only in kernel user
of it is the i915 driver, which will only uses it when it needs it), this
commit makes acpi_bus_get_status() always set status to ACPI_STA_DEFAULT
for the LPSS PWM device, fixing the lack of backlight control.

Signed-off-by: Hans de Goede 
[ rjw: Rename the new file to utils.c ]
Signed-off-by: Rafael J. Wysocki

Revert "x86/acpi: Set persistent cpuid <-> nodeid mapping when booting"

2017-03-11T13:41:18+00:00

Revert: dc6db24d2476 ("x86/acpi: Set persistent cpuid <-> nodeid mapping when booting")

The mapping of "cpuid <-> nodeid" is established at boot time via ACPI
tables to keep associations of workqueues and other node related items
consistent across cpu hotplug.

But, ACPI tables are unreliable and failures with that boot time mapping
have been reported on machines where the ACPI table and the physical
information which is retrieved at actual hotplug is inconsistent.

Revert the mapping implementation so it can be replaced with a less error
prone approach.

Signed-off-by: Dou Liyang 
Tested-by: Xiaolong Ye 
Cc: rjw@rjwysocki.net
Cc: linux-acpi@vger.kernel.org
Cc: guzheng1@huawei.com
Cc: izumi.taku@jp.fujitsu.com
Cc: lenb@kernel.org
Link: http://lkml.kernel.org/r/1488528147-2279-2-git-send-email-douly.fnst@cn.fujitsu.com
Signed-off-by: Thomas Gleixner

ACPI / bus: Introduce acpi_of_modalias() equiv of of_modalias_node()

2017-02-07T12:31:50+00:00

When using devicetree stuff like i2c_client.name or spi_device.modalias
is initialized to the first DT compatible id with the vendor prefix
stripped. Since some drivers rely on this try to replicate it when using
ACPI with DT ids.

Signed-off-by: Dan O'Donovan 
Reviewed-by: Mika Westerberg 
Reviewed-by: Andy Shevchenko 
Reviewed-by: Jarkko Nikula 
Tested-by: Jarkko Nikula 
Signed-off-by: Rafael J. Wysocki

Merge branches 'acpica' and 'acpi-scan'

2016-12-22T13:34:24+00:00

* acpica:
  ACPI / osl: Remove deprecated acpi_get_table_with_size()/early_acpi_os_unmap_memory()
  ACPI / osl: Remove acpi_get_table_with_size()/early_acpi_os_unmap_memory() users
  ACPICA: Tables: Allow FADT to be customized with virtual address
  ACPICA: Tables: Back port acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux kernel

* acpi-scan:
  ACPI: do not warn if _BQC does not exist

ACPI / osl: Remove deprecated acpi_get_table_with_size()/early_acpi_os_unmap_memory()

2016-12-21T01:36:38+00:00

Since all users are cleaned up, remove the 2 deprecated APIs due to no
users.
As a Linux variable rather than an ACPICA variable, acpi_gbl_permanent_mmap
is renamed to acpi_permanent_mmap to have a consistent coding style across
entire Linux ACPI subsystem.

Signed-off-by: Lv Zheng 
Signed-off-by: Rafael J. Wysocki

sched/x86: Change CONFIG_SCHED_ITMT to CONFIG_SCHED_MC_PRIO

2016-11-30T07:27:08+00:00

Rename CONFIG_SCHED_ITMT for Intel Turbo Boost Max Technology 3.0
to CONFIG_SCHED_MC_PRIO.  This makes the configuration extensible
in future to other architectures that wish to similarly establish
CPU core priorities support in the scheduler.

The description in Kconfig is updated to reflect this change with
added details for better clarity.  The configuration is explicitly
default-y, to enable the feature on CPUs that have this feature.

It has no effect on non-TBM3 CPUs.

Signed-off-by: Tim Chen 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Srinivas Pandruvada 
Cc: Thomas Gleixner 
Cc: bp@suse.de
Cc: jolsa@redhat.com
Cc: linux-acpi@vger.kernel.org
Cc: linux-pm@vger.kernel.org
Cc: rjw@rjwysocki.net
Link: http://lkml.kernel.org/r/2b2ee29d93e3f162922d72d0165a1405864fbb23.1480444902.git.tim.c.chen@linux.intel.com
Signed-off-by: Ingo Molnar