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Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/g…
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…it/lenb/linux-acpi-2.6

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (47 commits)
  ACPI: pci_link: remove acpi_irq_balance_set() interface
  fujitsu-laptop: Add DMI callback for Lifebook S6420
  ACPI: EC: Don't do transaction from GPE handler in poll mode.
  ACPI: EC: lower interrupt storm treshold
  ACPICA: Use spinlock for acpi_{en|dis}able_gpe
  ACPI: EC: restart failed command
  ACPI: EC: wait for last write gpe
  ACPI: EC: make kernel messages more useful when GPE storm is detected
  ACPI: EC: revert msleep patch
  thinkpad_acpi: fingers off backlight if video.ko is serving this functionality
  sony-laptop: fingers off backlight if video.ko is serving this functionality
  msi-laptop: fingers off backlight if video.ko is serving this functionality
  fujitsu-laptop: fingers off backlight if video.ko is serving this functionality
  eeepc-laptop: fingers off backlight if video.ko is serving this functionality
  compal: fingers off backlight if video.ko is serving this functionality
  asus-acpi: fingers off backlight if video.ko is serving this functionality
  Acer-WMI: fingers off backlight if video.ko is serving this functionality
  ACPI video: if no ACPI backlight support, use vendor drivers
  ACPI: video: Ignore devices that aren't present in hardware
  Delete an unwanted return statement at evgpe.c
  ...
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Linus Torvalds committed Nov 12, 2008
2 parents f21f237 + d1876ba commit 08c1184
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16 changes: 8 additions & 8 deletions Documentation/ABI/testing/sysfs-firmware-acpi
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Expand Up @@ -89,7 +89,7 @@ Description:

error - an interrupt that can't be accounted for above.

invalid: it's either a wakeup GPE or a GPE/Fixed Event that
invalid: it's either a GPE or a Fixed Event that
doesn't have an event handler.

disable: the GPE/Fixed Event is valid but disabled.
Expand Down Expand Up @@ -117,30 +117,30 @@ Description:
and other user space applications so that the machine won't shutdown
when pressing the power button.
# cat ff_pwr_btn
0
0 enabled
# press the power button for 3 times;
# cat ff_pwr_btn
3
3 enabled
# echo disable > ff_pwr_btn
# cat ff_pwr_btn
disable
3 disabled
# press the power button for 3 times;
# cat ff_pwr_btn
disable
3 disabled
# echo enable > ff_pwr_btn
# cat ff_pwr_btn
4
4 enabled
/*
* this is because the status bit is set even if the enable bit is cleared,
* and it triggers an ACPI fixed event when the enable bit is set again
*/
# press the power button for 3 times;
# cat ff_pwr_btn
7
7 enabled
# echo disable > ff_pwr_btn
# press the power button for 3 times;
# echo clear > ff_pwr_btn /* clear the status bit */
# echo disable > ff_pwr_btn
# cat ff_pwr_btn
7
7 enabled

148 changes: 148 additions & 0 deletions Documentation/acpi/debug.txt
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@@ -0,0 +1,148 @@
ACPI Debug Output


The ACPI CA, the Linux ACPI core, and some ACPI drivers can generate debug
output. This document describes how to use this facility.

Compile-time configuration
--------------------------

ACPI debug output is globally enabled by CONFIG_ACPI_DEBUG. If this config
option is turned off, the debug messages are not even built into the
kernel.

Boot- and run-time configuration
--------------------------------

When CONFIG_ACPI_DEBUG=y, you can select the component and level of messages
you're interested in. At boot-time, use the acpi.debug_layer and
acpi.debug_level kernel command line options. After boot, you can use the
debug_layer and debug_level files in /sys/module/acpi/parameters/ to control
the debug messages.

debug_layer (component)
-----------------------

The "debug_layer" is a mask that selects components of interest, e.g., a
specific driver or part of the ACPI interpreter. To build the debug_layer
bitmask, look for the "#define _COMPONENT" in an ACPI source file.

You can set the debug_layer mask at boot-time using the acpi.debug_layer
command line argument, and you can change it after boot by writing values
to /sys/module/acpi/parameters/debug_layer.

The possible components are defined in include/acpi/acoutput.h and
include/acpi/acpi_drivers.h. Reading /sys/module/acpi/parameters/debug_layer
shows the supported mask values, currently these:

ACPI_UTILITIES 0x00000001
ACPI_HARDWARE 0x00000002
ACPI_EVENTS 0x00000004
ACPI_TABLES 0x00000008
ACPI_NAMESPACE 0x00000010
ACPI_PARSER 0x00000020
ACPI_DISPATCHER 0x00000040
ACPI_EXECUTER 0x00000080
ACPI_RESOURCES 0x00000100
ACPI_CA_DEBUGGER 0x00000200
ACPI_OS_SERVICES 0x00000400
ACPI_CA_DISASSEMBLER 0x00000800
ACPI_COMPILER 0x00001000
ACPI_TOOLS 0x00002000
ACPI_BUS_COMPONENT 0x00010000
ACPI_AC_COMPONENT 0x00020000
ACPI_BATTERY_COMPONENT 0x00040000
ACPI_BUTTON_COMPONENT 0x00080000
ACPI_SBS_COMPONENT 0x00100000
ACPI_FAN_COMPONENT 0x00200000
ACPI_PCI_COMPONENT 0x00400000
ACPI_POWER_COMPONENT 0x00800000
ACPI_CONTAINER_COMPONENT 0x01000000
ACPI_SYSTEM_COMPONENT 0x02000000
ACPI_THERMAL_COMPONENT 0x04000000
ACPI_MEMORY_DEVICE_COMPONENT 0x08000000
ACPI_VIDEO_COMPONENT 0x10000000
ACPI_PROCESSOR_COMPONENT 0x20000000

debug_level
-----------

The "debug_level" is a mask that selects different types of messages, e.g.,
those related to initialization, method execution, informational messages, etc.
To build debug_level, look at the level specified in an ACPI_DEBUG_PRINT()
statement.

The ACPI interpreter uses several different levels, but the Linux
ACPI core and ACPI drivers generally only use ACPI_LV_INFO.

You can set the debug_level mask at boot-time using the acpi.debug_level
command line argument, and you can change it after boot by writing values
to /sys/module/acpi/parameters/debug_level.

The possible levels are defined in include/acpi/acoutput.h. Reading
/sys/module/acpi/parameters/debug_level shows the supported mask values,
currently these:

ACPI_LV_INIT 0x00000001
ACPI_LV_DEBUG_OBJECT 0x00000002
ACPI_LV_INFO 0x00000004
ACPI_LV_INIT_NAMES 0x00000020
ACPI_LV_PARSE 0x00000040
ACPI_LV_LOAD 0x00000080
ACPI_LV_DISPATCH 0x00000100
ACPI_LV_EXEC 0x00000200
ACPI_LV_NAMES 0x00000400
ACPI_LV_OPREGION 0x00000800
ACPI_LV_BFIELD 0x00001000
ACPI_LV_TABLES 0x00002000
ACPI_LV_VALUES 0x00004000
ACPI_LV_OBJECTS 0x00008000
ACPI_LV_RESOURCES 0x00010000
ACPI_LV_USER_REQUESTS 0x00020000
ACPI_LV_PACKAGE 0x00040000
ACPI_LV_ALLOCATIONS 0x00100000
ACPI_LV_FUNCTIONS 0x00200000
ACPI_LV_OPTIMIZATIONS 0x00400000
ACPI_LV_MUTEX 0x01000000
ACPI_LV_THREADS 0x02000000
ACPI_LV_IO 0x04000000
ACPI_LV_INTERRUPTS 0x08000000
ACPI_LV_AML_DISASSEMBLE 0x10000000
ACPI_LV_VERBOSE_INFO 0x20000000
ACPI_LV_FULL_TABLES 0x40000000
ACPI_LV_EVENTS 0x80000000

Examples
--------

For example, drivers/acpi/bus.c contains this:

#define _COMPONENT ACPI_BUS_COMPONENT
...
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n"));

To turn on this message, set the ACPI_BUS_COMPONENT bit in acpi.debug_layer
and the ACPI_LV_INFO bit in acpi.debug_level. (The ACPI_DEBUG_PRINT
statement uses ACPI_DB_INFO, which is macro based on the ACPI_LV_INFO
definition.)

Enable all AML "Debug" output (stores to the Debug object while interpreting
AML) during boot:

acpi.debug_layer=0xffffffff acpi.debug_level=0x2

Enable PCI and PCI interrupt routing debug messages:

acpi.debug_layer=0x400000 acpi.debug_level=0x4

Enable all ACPI hardware-related messages:

acpi.debug_layer=0x2 acpi.debug_level=0xffffffff

Enable all ACPI_DB_INFO messages after boot:

# echo 0x4 > /sys/module/acpi/parameters/debug_level

Show all valid component values:

# cat /sys/module/acpi/parameters/debug_layer
87 changes: 35 additions & 52 deletions Documentation/kernel-parameters.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -198,59 +198,42 @@ and is between 256 and 4096 characters. It is defined in the file
that require a timer override, but don't have
HPET

acpi.debug_layer= [HW,ACPI]
acpi_backlight= [HW,ACPI]
acpi_backlight=vendor
acpi_backlight=video
If set to vendor, prefer vendor specific driver
(e.g. thinkpad_acpi, sony_acpi, etc.) instead
of the ACPI video.ko driver.

acpi_display_output= [HW,ACPI]
acpi_display_output=vendor
acpi_display_output=video
See above.

acpi.debug_layer= [HW,ACPI,ACPI_DEBUG]
acpi.debug_level= [HW,ACPI,ACPI_DEBUG]
Format: <int>
Each bit of the <int> indicates an ACPI debug layer,
1: enable, 0: disable. It is useful for boot time
debugging. After system has booted up, it can be set
via /sys/module/acpi/parameters/debug_layer.
CONFIG_ACPI_DEBUG must be enabled for this to produce any output.
Available bits (add the numbers together) to enable debug output
for specific parts of the ACPI subsystem:
0x01 utilities 0x02 hardware 0x04 events 0x08 tables
0x10 namespace 0x20 parser 0x40 dispatcher
0x80 executer 0x100 resources 0x200 acpica debugger
0x400 os services 0x800 acpica disassembler.
The number can be in decimal or prefixed with 0x in hex.
Warning: Many of these options can produce a lot of
output and make your system unusable. Be very careful.

acpi.debug_level= [HW,ACPI]
Format: <int>
Each bit of the <int> indicates an ACPI debug level,
which corresponds to the level in an ACPI_DEBUG_PRINT
statement. After system has booted up, this mask
can be set via /sys/module/acpi/parameters/debug_level.

CONFIG_ACPI_DEBUG must be enabled for this to produce
any output. The number can be in decimal or prefixed
with 0x in hex. Some of these options produce so much
output that the system is unusable.

The following global components are defined by the
ACPI CA:
0x01 error
0x02 warn
0x04 init
0x08 debug object
0x10 info
0x20 init names
0x40 parse
0x80 load
0x100 dispatch
0x200 execute
0x400 names
0x800 operation region
0x1000 bfield
0x2000 tables
0x4000 values
0x8000 objects
0x10000 resources
0x20000 user requests
0x40000 package
The number can be in decimal or prefixed with 0x in hex.
Warning: Many of these options can produce a lot of
output and make your system unusable. Be very careful.
CONFIG_ACPI_DEBUG must be enabled to produce any ACPI
debug output. Bits in debug_layer correspond to a
_COMPONENT in an ACPI source file, e.g.,
#define _COMPONENT ACPI_PCI_COMPONENT
Bits in debug_level correspond to a level in
ACPI_DEBUG_PRINT statements, e.g.,
ACPI_DEBUG_PRINT((ACPI_DB_INFO, ...
See Documentation/acpi/debug.txt for more information
about debug layers and levels.

Enable AML "Debug" output, i.e., stores to the Debug
object while interpreting AML:
acpi.debug_layer=0xffffffff acpi.debug_level=0x2
Enable PCI/PCI interrupt routing info messages:
acpi.debug_layer=0x400000 acpi.debug_level=0x4
Enable all messages related to ACPI hardware:
acpi.debug_layer=0x2 acpi.debug_level=0xffffffff

Some values produce so much output that the system is
unusable. The "log_buf_len" parameter may be useful
if you need to capture more output.

acpi.power_nocheck= [HW,ACPI]
Format: 1/0 enable/disable the check of power state.
Expand Down
11 changes: 10 additions & 1 deletion MAINTAINERS
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Original file line number Diff line number Diff line change
Expand Up @@ -2216,6 +2216,13 @@ M: adaplas@gmail.com
L: linux-fbdev-devel@lists.sourceforge.net (moderated for non-subscribers)
S: Maintained

INTEL MENLOW THERMAL DRIVER
P: Sujith Thomas
M: sujith.thomas@intel.com
L: linux-acpi@vger.kernel.org
W: http://www.lesswatts.org/projects/acpi/
S: Supported

INTEL IA32 MICROCODE UPDATE SUPPORT
P: Tigran Aivazian
M: tigran@aivazian.fsnet.co.uk
Expand Down Expand Up @@ -3377,7 +3384,9 @@ S: Maintained

PNP SUPPORT
P: Adam Belay
M: ambx1@neo.rr.com
M: abelay@mit.edu
P: Bjorn Helgaas
M: bjorn.helgaas@hp.com
S: Maintained

PNXxxxx I2C DRIVER
Expand Down
1 change: 0 additions & 1 deletion arch/x86/include/asm/acpi.h
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Original file line number Diff line number Diff line change
Expand Up @@ -113,7 +113,6 @@ static inline void acpi_disable_pci(void)
acpi_pci_disabled = 1;
acpi_noirq_set();
}
extern int acpi_irq_balance_set(char *str);

/* routines for saving/restoring kernel state */
extern int acpi_save_state_mem(void);
Expand Down
1 change: 0 additions & 1 deletion arch/x86/kernel/acpi/boot.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1343,7 +1343,6 @@ static void __init acpi_process_madt(void)
error = acpi_parse_madt_ioapic_entries();
if (!error) {
acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
acpi_irq_balance_set(NULL);
acpi_ioapic = 1;

smp_found_config = 1;
Expand Down
22 changes: 7 additions & 15 deletions drivers/acpi/Kconfig
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Original file line number Diff line number Diff line change
Expand Up @@ -312,9 +312,13 @@ config ACPI_DEBUG
bool "Debug Statements"
default n
help
The ACPI driver can optionally report errors with a great deal
of verbosity. Saying Y enables these statements. This will increase
your kernel size by around 50K.
The ACPI subsystem can produce debug output. Saying Y enables this
output and increases the kernel size by around 50K.

Use the acpi.debug_layer and acpi.debug_level kernel command-line
parameters documented in Documentation/acpi/debug.txt and
Documentation/kernel-parameters.txt to control the type and
amount of debug output.

config ACPI_DEBUG_FUNC_TRACE
bool "Additionally enable ACPI function tracing"
Expand All @@ -324,14 +328,6 @@ config ACPI_DEBUG_FUNC_TRACE
ACPI Debug Statements slow down ACPI processing. Function trace
is about half of the penalty and is rarely useful.

config ACPI_EC
bool
default y
help
This driver is required on some systems for the proper operation of
the battery and thermal drivers. If you are compiling for a
mobile system, say Y.

config ACPI_PCI_SLOT
tristate "PCI slot detection driver"
default n
Expand All @@ -341,10 +337,6 @@ config ACPI_PCI_SLOT
help you correlate PCI bus addresses with the physical geography
of your slots. If you are unsure, say N.

config ACPI_POWER
bool
default y

config ACPI_SYSTEM
bool
default y
Expand Down
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