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r: 351112
b: refs/heads/master
c: 10baf04
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Rafael J. Wysocki committed Feb 18, 2013
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2 changes: 1 addition & 1 deletion [refs]
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---
refs/heads/master: ca62cf59ceef10ff2ebca0e7f764507186870270
refs/heads/master: 10baf04e95fbf7eb6089410220a547211dd2ffa7
13 changes: 13 additions & 0 deletions trunk/Documentation/ABI/testing/sysfs-devices-power_resources_D0
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What: /sys/devices/.../power_resources_D0/
Date: January 2013
Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Description:
The /sys/devices/.../power_resources_D0/ directory is only
present for device objects representing ACPI device nodes that
use ACPI power resources for power management.

If present, it contains symbolic links to device directories
representing ACPI power resources that need to be turned on for
the given device node to be in ACPI power state D0. The names
of the links are the same as the names of the directories they
point to.
14 changes: 14 additions & 0 deletions trunk/Documentation/ABI/testing/sysfs-devices-power_resources_D1
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What: /sys/devices/.../power_resources_D1/
Date: January 2013
Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Description:
The /sys/devices/.../power_resources_D1/ directory is only
present for device objects representing ACPI device nodes that
use ACPI power resources for power management and support ACPI
power state D1.

If present, it contains symbolic links to device directories
representing ACPI power resources that need to be turned on for
the given device node to be in ACPI power state D1. The names
of the links are the same as the names of the directories they
point to.
14 changes: 14 additions & 0 deletions trunk/Documentation/ABI/testing/sysfs-devices-power_resources_D2
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What: /sys/devices/.../power_resources_D2/
Date: January 2013
Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Description:
The /sys/devices/.../power_resources_D2/ directory is only
present for device objects representing ACPI device nodes that
use ACPI power resources for power management and support ACPI
power state D2.

If present, it contains symbolic links to device directories
representing ACPI power resources that need to be turned on for
the given device node to be in ACPI power state D2. The names
of the links are the same as the names of the directories they
point to.
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What: /sys/devices/.../power_resources_D3hot/
Date: January 2013
Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Description:
The /sys/devices/.../power_resources_D3hot/ directory is only
present for device objects representing ACPI device nodes that
use ACPI power resources for power management and support ACPI
power state D3hot.

If present, it contains symbolic links to device directories
representing ACPI power resources that need to be turned on for
the given device node to be in ACPI power state D3hot. The
names of the links are the same as the names of the directories
they point to.
20 changes: 20 additions & 0 deletions trunk/Documentation/ABI/testing/sysfs-devices-power_state
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What: /sys/devices/.../power_state
Date: January 2013
Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Description:
The /sys/devices/.../power_state attribute is only present for
device objects representing ACPI device nodes that provide power
management methods.

If present, it contains a string representing the current ACPI
power state of the given device node. Its possible values,
"D0", "D1", "D2", "D3hot", and "D3cold", reflect the power state
names defined by the ACPI specification (ACPI 4 and above).

If the device node uses shared ACPI power resources, this state
determines a list of power resources required not to be turned
off. However, some power resources needed by the device node in
higher-power (lower-number) states may also be ON because of
some other devices using them at the moment.

This attribute is read-only.
23 changes: 23 additions & 0 deletions trunk/Documentation/ABI/testing/sysfs-devices-real_power_state
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What: /sys/devices/.../real_power_state
Date: January 2013
Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Description:
The /sys/devices/.../real_power_state attribute is only present
for device objects representing ACPI device nodes that provide
power management methods and use ACPI power resources for power
management.

If present, it contains a string representing the real ACPI
power state of the given device node as returned by the _PSC
control method or inferred from the configuration of power
resources. Its possible values, "D0", "D1", "D2", "D3hot", and
"D3cold", reflect the power state names defined by the ACPI
specification (ACPI 4 and above).

In some situations the value of this attribute may be different
from the value of the /sys/devices/.../power_state attribute for
the same device object. If that happens, some shared power
resources used by the device node are only ON because of some
other devices using them at the moment.

This attribute is read-only.
12 changes: 12 additions & 0 deletions trunk/Documentation/ABI/testing/sysfs-devices-resource_in_use
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What: /sys/devices/.../resource_in_use
Date: January 2013
Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Description:
The /sys/devices/.../resource_in_use attribute is only present
for device objects representing ACPI power resources.

If present, it contains a number (0 or 1) representing the
current status of the given power resource (0 means that the
resource is not in use and therefore it has been turned off).

This attribute is read-only.
4 changes: 2 additions & 2 deletions trunk/Documentation/acpi/enumeration.txt
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Expand Up @@ -63,8 +63,8 @@ from ACPI tables.
Currently the kernel is not able to automatically determine from which ACPI
device it should make the corresponding platform device so we need to add
the ACPI device explicitly to acpi_platform_device_ids list defined in
drivers/acpi/scan.c. This limitation is only for the platform devices, SPI
and I2C devices are created automatically as described below.
drivers/acpi/acpi_platform.c. This limitation is only for the platform
devices, SPI and I2C devices are created automatically as described below.

SPI serial bus support
~~~~~~~~~~~~~~~~~~~~~~
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77 changes: 77 additions & 0 deletions trunk/Documentation/acpi/scan_handlers.txt
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ACPI Scan Handlers

Copyright (C) 2012, Intel Corporation
Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

During system initialization and ACPI-based device hot-add, the ACPI namespace
is scanned in search of device objects that generally represent various pieces
of hardware. This causes a struct acpi_device object to be created and
registered with the driver core for every device object in the ACPI namespace
and the hierarchy of those struct acpi_device objects reflects the namespace
layout (i.e. parent device objects in the namespace are represented by parent
struct acpi_device objects and analogously for their children). Those struct
acpi_device objects are referred to as "device nodes" in what follows, but they
should not be confused with struct device_node objects used by the Device Trees
parsing code (although their role is analogous to the role of those objects).

During ACPI-based device hot-remove device nodes representing pieces of hardware
being removed are unregistered and deleted.

The core ACPI namespace scanning code in drivers/acpi/scan.c carries out basic
initialization of device nodes, such as retrieving common configuration
information from the device objects represented by them and populating them with
appropriate data, but some of them require additional handling after they have
been registered. For example, if the given device node represents a PCI host
bridge, its registration should cause the PCI bus under that bridge to be
enumerated and PCI devices on that bus to be registered with the driver core.
Similarly, if the device node represents a PCI interrupt link, it is necessary
to configure that link so that the kernel can use it.

Those additional configuration tasks usually depend on the type of the hardware
component represented by the given device node which can be determined on the
basis of the device node's hardware ID (HID). They are performed by objects
called ACPI scan handlers represented by the following structure:

struct acpi_scan_handler {
const struct acpi_device_id *ids;
struct list_head list_node;
int (*attach)(struct acpi_device *dev, const struct acpi_device_id *id);
void (*detach)(struct acpi_device *dev);
};

where ids is the list of IDs of device nodes the given handler is supposed to
take care of, list_node is the hook to the global list of ACPI scan handlers
maintained by the ACPI core and the .attach() and .detach() callbacks are
executed, respectively, after registration of new device nodes and before
unregistration of device nodes the handler attached to previously.

The namespace scanning function, acpi_bus_scan(), first registers all of the
device nodes in the given namespace scope with the driver core. Then, it tries
to match a scan handler against each of them using the ids arrays of the
available scan handlers. If a matching scan handler is found, its .attach()
callback is executed for the given device node. If that callback returns 1,
that means that the handler has claimed the device node and is now responsible
for carrying out any additional configuration tasks related to it. It also will
be responsible for preparing the device node for unregistration in that case.
The device node's handler field is then populated with the address of the scan
handler that has claimed it.

If the .attach() callback returns 0, it means that the device node is not
interesting to the given scan handler and may be matched against the next scan
handler in the list. If it returns a (negative) error code, that means that
the namespace scan should be terminated due to a serious error. The error code
returned should then reflect the type of the error.

The namespace trimming function, acpi_bus_trim(), first executes .detach()
callbacks from the scan handlers of all device nodes in the given namespace
scope (if they have scan handlers). Next, it unregisters all of the device
nodes in that scope.

ACPI scan handlers can be added to the list maintained by the ACPI core with the
help of the acpi_scan_add_handler() function taking a pointer to the new scan
handler as an argument. The order in which scan handlers are added to the list
is the order in which they are matched against device nodes during namespace
scans.

All scan handles must be added to the list before acpi_bus_scan() is run for the
first time and they cannot be removed from it.
6 changes: 6 additions & 0 deletions trunk/Documentation/cpu-freq/cpu-drivers.txt
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Expand Up @@ -111,6 +111,12 @@ policy->governor must contain the "default policy" for
For setting some of these values, the frequency table helpers might be
helpful. See the section 2 for more information on them.

SMP systems normally have same clock source for a group of cpus. For these the
.init() would be called only once for the first online cpu. Here the .init()
routine must initialize policy->cpus with mask of all possible cpus (Online +
Offline) that share the clock. Then the core would copy this mask onto
policy->related_cpus and will reset policy->cpus to carry only online cpus.


1.3 verify
------------
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8 changes: 4 additions & 4 deletions trunk/Documentation/cpu-freq/user-guide.txt
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Expand Up @@ -190,11 +190,11 @@ scaling_max_freq show the current "policy limits" (in
first set scaling_max_freq, then
scaling_min_freq.

affected_cpus : List of CPUs that require software coordination
of frequency.
affected_cpus : List of Online CPUs that require software
coordination of frequency.

related_cpus : List of CPUs that need some sort of frequency
coordination, whether software or hardware.
related_cpus : List of Online + Offline CPUs that need software
coordination of frequency.

scaling_driver : Hardware driver for cpufreq.

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27 changes: 27 additions & 0 deletions trunk/Documentation/devicetree/bindings/arm/kirkwood.txt
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Marvell Kirkwood Platforms Device Tree Bindings
-----------------------------------------------

Boards with a SoC of the Marvell Kirkwood
shall have the following property:

Required root node property:

compatible: must contain "marvell,kirkwood";

In order to support the kirkwood cpufreq driver, there must be a node
cpus/cpu@0 with three clocks, "cpu_clk", "ddrclk" and "powersave",
where the "powersave" clock is a gating clock used to switch the CPU
between the "cpu_clk" and the "ddrclk".

Example:

cpus {
#address-cells = <1>;
#size-cells = <0>;

cpu@0 {
device_type = "cpu";
compatible = "marvell,sheeva-88SV131";
clocks = <&core_clk 1>, <&core_clk 3>, <&gate_clk 11>;
clock-names = "cpu_clk", "ddrclk", "powersave";
};
7 changes: 6 additions & 1 deletion trunk/Documentation/kernel-parameters.txt
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Expand Up @@ -1126,6 +1126,11 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
0 disables intel_idle and fall back on acpi_idle.
1 to 6 specify maximum depth of C-state.

intel_pstate= [X86]
disable
Do not enable intel_pstate as the default
scaling driver for the supported processors

intremap= [X86-64, Intel-IOMMU]
on enable Interrupt Remapping (default)
off disable Interrupt Remapping
Expand Down Expand Up @@ -2429,7 +2434,7 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
real-time workloads. It can also improve energy
efficiency for asymmetric multiprocessors.

rcu_nocbs_poll [KNL,BOOT]
rcu_nocb_poll [KNL,BOOT]
Rather than requiring that offloaded CPUs
(specified by rcu_nocbs= above) explicitly
awaken the corresponding "rcuoN" kthreads,
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5 changes: 5 additions & 0 deletions trunk/Documentation/power/freezing-of-tasks.txt
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Expand Up @@ -223,3 +223,8 @@ since they ask the freezer to skip freezing this task, since it is anyway
only after the entire suspend/hibernation sequence is complete.
So, to summarize, use [un]lock_system_sleep() instead of directly using
mutex_[un]lock(&pm_mutex). That would prevent freezing failures.

V. Miscellaneous
/sys/power/pm_freeze_timeout controls how long it will cost at most to freeze
all user space processes or all freezable kernel threads, in unit of millisecond.
The default value is 20000, with range of unsigned integer.
4 changes: 4 additions & 0 deletions trunk/Documentation/power/runtime_pm.txt
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Expand Up @@ -426,6 +426,10 @@ drivers/base/power/runtime.c and include/linux/pm_runtime.h:
'power.runtime_error' is set or 'power.disable_depth' is greater than
zero)

bool pm_runtime_active(struct device *dev);
- return true if the device's runtime PM status is 'active' or its
'power.disable_depth' field is not equal to zero, or false otherwise

bool pm_runtime_suspended(struct device *dev);
- return true if the device's runtime PM status is 'suspended' and its
'power.disable_depth' field is equal to zero, or false otherwise
Expand Down
27 changes: 1 addition & 26 deletions trunk/Documentation/trace/events-power.txt
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Expand Up @@ -17,7 +17,7 @@ Cf. include/trace/events/power.h for the events definitions.
1. Power state switch events
============================

1.1 New trace API
1.1 Trace API
-----------------

A 'cpu' event class gathers the CPU-related events: cpuidle and
Expand All @@ -41,31 +41,6 @@ The event which has 'state=4294967295' in the trace is very important to the use
space tools which are using it to detect the end of the current state, and so to
correctly draw the states diagrams and to calculate accurate statistics etc.

1.2 DEPRECATED trace API
------------------------

A new Kconfig option CONFIG_EVENT_POWER_TRACING_DEPRECATED with the default value of
'y' has been created. This allows the legacy trace power API to be used conjointly
with the new trace API.
The Kconfig option, the old trace API (in include/trace/events/power.h) and the
old trace points will disappear in a future release (namely 2.6.41).

power_start "type=%lu state=%lu cpu_id=%lu"
power_frequency "type=%lu state=%lu cpu_id=%lu"
power_end "cpu_id=%lu"

The 'type' parameter takes one of those macros:
. POWER_NONE = 0,
. POWER_CSTATE = 1, /* C-State */
. POWER_PSTATE = 2, /* Frequency change or DVFS */

The 'state' parameter is set depending on the type:
. Target C-state for type=POWER_CSTATE,
. Target frequency for type=POWER_PSTATE,

power_end is used to indicate the exit of a state, corresponding to the latest
power_start event.

2. Clocks events
================
The clock events are used for clock enable/disable and for
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2 changes: 1 addition & 1 deletion trunk/Documentation/x86/boot.txt
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Expand Up @@ -57,7 +57,7 @@ Protocol 2.10: (Kernel 2.6.31) Added a protocol for relaxed alignment
Protocol 2.11: (Kernel 3.6) Added a field for offset of EFI handover
protocol entry point.

Protocol 2.12: (Kernel 3.9) Added the xloadflags field and extension fields
Protocol 2.12: (Kernel 3.8) Added the xloadflags field and extension fields
to struct boot_params for for loading bzImage and ramdisk
above 4G in 64bit.

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2 changes: 1 addition & 1 deletion trunk/MAINTAINERS
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Expand Up @@ -1489,7 +1489,7 @@ AVR32 ARCHITECTURE
M: Haavard Skinnemoen <hskinnemoen@gmail.com>
M: Hans-Christian Egtvedt <egtvedt@samfundet.no>
W: http://www.atmel.com/products/AVR32/
W: http://avr32linux.org/
W: http://mirror.egtvedt.no/avr32linux.org/
W: http://avrfreaks.net/
S: Maintained
F: arch/avr32/
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2 changes: 1 addition & 1 deletion trunk/Makefile
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@@ -1,7 +1,7 @@
VERSION = 3
PATCHLEVEL = 8
SUBLEVEL = 0
EXTRAVERSION = -rc6
EXTRAVERSION = -rc7
NAME = Unicycling Gorilla

# *DOCUMENTATION*
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10 changes: 10 additions & 0 deletions trunk/arch/arm/boot/dts/highbank.dts
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Expand Up @@ -37,6 +37,16 @@
next-level-cache = <&L2>;
clocks = <&a9pll>;
clock-names = "cpu";
operating-points = <
/* kHz ignored */
1300000 1000000
1200000 1000000
1100000 1000000
800000 1000000
400000 1000000
200000 1000000
>;
clock-latency = <100000>;
};

cpu@901 {
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