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authorLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-07 09:45:58 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-07 09:45:58 -0800
commitf0f1b3364ae7f48084bdf2837fb979ff59622523 (patch)
treee5ef68c0071f44178cc8d1948b64e216d57422aa /Documentation
parent4383f18b7f94a4d668c5eec68645c75d44556235 (diff)
parentb7143156c9ceee1a072c57aac8729d2dec5b3bf1 (diff)
Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (112 commits) ACPI: fix build warning Revert "cpuidle: build fix for non-x86" ACPI: update intrd DSDT override console messages ACPI: update DSDT override documentation ACPI: Add "acpi_no_initrd_override" kernel parameter ACPI: its a directory not a folder.... ACPI: misc cleanups ACPI: add missing prink prefix strings ACPI: cleanup acpi.h ACPICA: fix CONFIG_ACPI_DEBUG_FUNC_TRACE build ACPI: video: Ignore ACPI video devices that aren't present in hardware ACPI: video: reset brightness on resume ACPI: video: call ACPI notifier chain for ACPI video notifications ACPI: create notifier chain to get hotkey events to graphics driver ACPI: video: delete unused display switch on hotkey event code ACPI: video: create "brightness_switch_enabled" modparam cpuidle: Add a poll_idle method ACPI: cpuidle: Support C1 idle time accounting ACPI: enable MWAIT for C1 idle ACPI: idle: Fix acpi_safe_halt usages and interrupt enabling/disabling ...
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/00-INDEX3
-rw-r--r--Documentation/ABI/testing/sysfs-firmware-acpi99
-rw-r--r--Documentation/acpi/dsdt-override.txt15
-rwxr-xr-xDocumentation/acpi/initramfs-add-dsdt.sh43
-rw-r--r--Documentation/acpi/method-tracing.txt26
-rw-r--r--Documentation/kernel-parameters.txt9
-rw-r--r--Documentation/power/swsusp.txt5
-rw-r--r--Documentation/thermal/sysfs-api.txt246
-rw-r--r--Documentation/thinkpad-acpi.txt116
9 files changed, 552 insertions, 10 deletions
diff --git a/Documentation/00-INDEX b/Documentation/00-INDEX
index d273b557a934..6e9c4050a41b 100644
--- a/Documentation/00-INDEX
+++ b/Documentation/00-INDEX
@@ -14,6 +14,7 @@ Following translations are available on the WWW:
- this file.
ABI/
- info on kernel <-> userspace ABI and relative interface stability.
+
BUG-HUNTING
- brute force method of doing binary search of patches to find bug.
Changes
@@ -66,6 +67,8 @@ VGA-softcursor.txt
- how to change your VGA cursor from a blinking underscore.
accounting/
- documentation on accounting and taskstats.
+acpi/
+ - info on ACPI-specific hooks in the kernel.
aoe/
- description of AoE (ATA over Ethernet) along with config examples.
applying-patches.txt
diff --git a/Documentation/ABI/testing/sysfs-firmware-acpi b/Documentation/ABI/testing/sysfs-firmware-acpi
new file mode 100644
index 000000000000..9470ed9afcc0
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-firmware-acpi
@@ -0,0 +1,99 @@
+What: /sys/firmware/acpi/interrupts/
+Date: February 2008
+Contact: Len Brown <lenb@kernel.org>
+Description:
+ All ACPI interrupts are handled via a single IRQ,
+ the System Control Interrupt (SCI), which appears
+ as "acpi" in /proc/interrupts.
+
+ However, one of the main functions of ACPI is to make
+ the platform understand random hardware without
+ special driver support. So while the SCI handles a few
+ well known (fixed feature) interrupts sources, such
+ as the power button, it can also handle a variable
+ number of a "General Purpose Events" (GPE).
+
+ A GPE vectors to a specified handler in AML, which
+ can do a anything the BIOS writer wants from
+ OS context. GPE 0x12, for example, would vector
+ to a level or edge handler called _L12 or _E12.
+ The handler may do its business and return.
+ Or the handler may send send a Notify event
+ to a Linux device driver registered on an ACPI device,
+ such as a battery, or a processor.
+
+ To figure out where all the SCI's are coming from,
+ /sys/firmware/acpi/interrupts contains a file listing
+ every possible source, and the count of how many
+ times it has triggered.
+
+ $ cd /sys/firmware/acpi/interrupts
+ $ grep . *
+ error:0
+ ff_gbl_lock:0
+ ff_pmtimer:0
+ ff_pwr_btn:0
+ ff_rt_clk:0
+ ff_slp_btn:0
+ gpe00:0
+ gpe01:0
+ gpe02:0
+ gpe03:0
+ gpe04:0
+ gpe05:0
+ gpe06:0
+ gpe07:0
+ gpe08:0
+ gpe09:174
+ gpe0A:0
+ gpe0B:0
+ gpe0C:0
+ gpe0D:0
+ gpe0E:0
+ gpe0F:0
+ gpe10:0
+ gpe11:60
+ gpe12:0
+ gpe13:0
+ gpe14:0
+ gpe15:0
+ gpe16:0
+ gpe17:0
+ gpe18:0
+ gpe19:7
+ gpe1A:0
+ gpe1B:0
+ gpe1C:0
+ gpe1D:0
+ gpe1E:0
+ gpe1F:0
+ gpe_all:241
+ sci:241
+
+ sci - The total number of times the ACPI SCI
+ has claimed an interrupt.
+
+ gpe_all - count of SCI caused by GPEs.
+
+ gpeXX - count for individual GPE source
+
+ ff_gbl_lock - Global Lock
+
+ ff_pmtimer - PM Timer
+
+ ff_pwr_btn - Power Button
+
+ ff_rt_clk - Real Time Clock
+
+ ff_slp_btn - Sleep Button
+
+ error - an interrupt that can't be accounted for above.
+
+ Root has permission to clear any of these counters. Eg.
+ # echo 0 > gpe11
+
+ All counters can be cleared by clearing the total "sci":
+ # echo 0 > sci
+
+ None of these counters has an effect on the function
+ of the system, they are simply statistics.
diff --git a/Documentation/acpi/dsdt-override.txt b/Documentation/acpi/dsdt-override.txt
new file mode 100644
index 000000000000..5008f256a2db
--- /dev/null
+++ b/Documentation/acpi/dsdt-override.txt
@@ -0,0 +1,15 @@
+Linux supports two methods of overriding the BIOS DSDT:
+
+CONFIG_ACPI_CUSTOM_DSDT builds the image into the kernel.
+
+CONFIG_ACPI_CUSTOM_DSDT_INITRD adds the image to the initrd.
+
+When to use these methods is described in detail on the
+Linux/ACPI home page:
+http://www.lesswatts.org/projects/acpi/overridingDSDT.php
+
+Note that if both options are used, the DSDT supplied
+by the INITRD method takes precedence.
+
+Documentation/initramfs-add-dsdt.sh is provided for convenience
+for use with the CONFIG_ACPI_CUSTOM_DSDT_INITRD method.
diff --git a/Documentation/acpi/initramfs-add-dsdt.sh b/Documentation/acpi/initramfs-add-dsdt.sh
new file mode 100755
index 000000000000..17ef6e838e14
--- /dev/null
+++ b/Documentation/acpi/initramfs-add-dsdt.sh
@@ -0,0 +1,43 @@
+#!/bin/bash
+# Adds a DSDT file to the initrd (if it's an initramfs)
+# first argument is the name of archive
+# second argument is the name of the file to add
+# The file will be copied as /DSDT.aml
+
+# 20060126: fix "Premature end of file" with some old cpio (Roland Robic)
+# 20060205: this time it should really work
+
+# check the arguments
+if [ $# -ne 2 ]; then
+ program_name=$(basename $0)
+ echo "\
+$program_name: too few arguments
+Usage: $program_name initrd-name.img DSDT-to-add.aml
+Adds a DSDT file to an initrd (in initramfs format)
+
+ initrd-name.img: filename of the initrd in initramfs format
+ DSDT-to-add.aml: filename of the DSDT file to add
+ " 1>&2
+ exit 1
+fi
+
+# we should check it's an initramfs
+
+tempcpio=$(mktemp -d)
+# cleanup on exit, hangup, interrupt, quit, termination
+trap 'rm -rf $tempcpio' 0 1 2 3 15
+
+# extract the archive
+gunzip -c "$1" > "$tempcpio"/initramfs.cpio || exit 1
+
+# copy the DSDT file at the root of the directory so that we can call it "/DSDT.aml"
+cp -f "$2" "$tempcpio"/DSDT.aml
+
+# add the file
+cd "$tempcpio"
+(echo DSDT.aml | cpio --quiet -H newc -o -A -O "$tempcpio"/initramfs.cpio) || exit 1
+cd "$OLDPWD"
+
+# re-compress the archive
+gzip -c "$tempcpio"/initramfs.cpio > "$1"
+
diff --git a/Documentation/acpi/method-tracing.txt b/Documentation/acpi/method-tracing.txt
new file mode 100644
index 000000000000..f6efb1ea559a
--- /dev/null
+++ b/Documentation/acpi/method-tracing.txt
@@ -0,0 +1,26 @@
+/sys/module/acpi/parameters/:
+
+trace_method_name
+ The AML method name that the user wants to trace
+
+trace_debug_layer
+ The temporary debug_layer used when tracing the method.
+ Using 0xffffffff by default if it is 0.
+
+trace_debug_level
+ The temporary debug_level used when tracing the method.
+ Using 0x00ffffff by default if it is 0.
+
+trace_state
+ The status of the tracing feature.
+
+ "enabled" means this feature is enabled
+ and the AML method is traced every time it's executed.
+
+ "1" means this feature is enabled and the AML method
+ will only be traced during the next execution.
+
+ "disabled" means this feature is disabled.
+ Users can enable/disable this debug tracing feature by
+ "echo string > /sys/module/acpi/parameters/trace_state".
+ "string" should be one of "enable", "disable" and "1".
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 8fd5aa40585f..0dcbd266b442 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -147,8 +147,10 @@ and is between 256 and 4096 characters. It is defined in the file
default: 0
acpi_sleep= [HW,ACPI] Sleep options
- Format: { s3_bios, s3_mode }
- See Documentation/power/video.txt
+ Format: { s3_bios, s3_mode, s3_beep }
+ See Documentation/power/video.txt for s3_bios and s3_mode.
+ s3_beep is for debugging; it makes the PC's speaker beep
+ as soon as the kernel's real-mode entry point is called.
acpi_sci= [HW,ACPI] ACPI System Control Interrupt trigger mode
Format: { level | edge | high | low }
@@ -175,6 +177,9 @@ and is between 256 and 4096 characters. It is defined in the file
acpi_no_auto_ssdt [HW,ACPI] Disable automatic loading of SSDT
+ acpi_no_initrd_override [KNL,ACPI]
+ Disable loading custom ACPI tables from the initramfs
+
acpi_os_name= [HW,ACPI] Tell ACPI BIOS the name of the OS
Format: To spoof as Windows 98: ="Microsoft Windows"
diff --git a/Documentation/power/swsusp.txt b/Documentation/power/swsusp.txt
index aea7e9209667..9d60ab717a7b 100644
--- a/Documentation/power/swsusp.txt
+++ b/Documentation/power/swsusp.txt
@@ -386,6 +386,11 @@ before suspending; then remount them after resuming.
There is a work-around for this problem. For more information, see
Documentation/usb/persist.txt.
+Q: Can I suspend-to-disk using a swap partition under LVM?
+
+A: No. You can suspend successfully, but you'll not be able to
+resume. uswsusp should be able to work with LVM. See suspend.sf.net.
+
Q: I upgraded the kernel from 2.6.15 to 2.6.16. Both kernels were
compiled with the similar configuration files. Anyway I found that
suspend to disk (and resume) is much slower on 2.6.16 compared to
diff --git a/Documentation/thermal/sysfs-api.txt b/Documentation/thermal/sysfs-api.txt
new file mode 100644
index 000000000000..5776e090359d
--- /dev/null
+++ b/Documentation/thermal/sysfs-api.txt
@@ -0,0 +1,246 @@
+Generic Thermal Sysfs driver How To
+=========================
+
+Written by Sujith Thomas <sujith.thomas@intel.com>, Zhang Rui <rui.zhang@intel.com>
+
+Updated: 2 January 2008
+
+Copyright (c) 2008 Intel Corporation
+
+
+0. Introduction
+
+The generic thermal sysfs provides a set of interfaces for thermal zone devices (sensors)
+and thermal cooling devices (fan, processor...) to register with the thermal management
+solution and to be a part of it.
+
+This how-to focusses on enabling new thermal zone and cooling devices to participate
+in thermal management.
+This solution is platform independent and any type of thermal zone devices and
+cooling devices should be able to make use of the infrastructure.
+
+The main task of the thermal sysfs driver is to expose thermal zone attributes as well
+as cooling device attributes to the user space.
+An intelligent thermal management application can make decisions based on inputs
+from thermal zone attributes (the current temperature and trip point temperature)
+and throttle appropriate devices.
+
+[0-*] denotes any positive number starting from 0
+[1-*] denotes any positive number starting from 1
+
+1. thermal sysfs driver interface functions
+
+1.1 thermal zone device interface
+1.1.1 struct thermal_zone_device *thermal_zone_device_register(char *name, int trips,
+ void *devdata, struct thermal_zone_device_ops *ops)
+
+ This interface function adds a new thermal zone device (sensor) to
+ /sys/class/thermal folder as thermal_zone[0-*].
+ It tries to bind all the thermal cooling devices registered at the same time.
+
+ name: the thermal zone name.
+ trips: the total number of trip points this thermal zone supports.
+ devdata: device private data
+ ops: thermal zone device callbacks.
+ .bind: bind the thermal zone device with a thermal cooling device.
+ .unbind: unbing the thermal zone device with a thermal cooling device.
+ .get_temp: get the current temperature of the thermal zone.
+ .get_mode: get the current mode (user/kernel) of the thermal zone.
+ "kernel" means thermal management is done in kernel.
+ "user" will prevent kernel thermal driver actions upon trip points
+ so that user applications can take charge of thermal management.
+ .set_mode: set the mode (user/kernel) of the thermal zone.
+ .get_trip_type: get the type of certain trip point.
+ .get_trip_temp: get the temperature above which the certain trip point
+ will be fired.
+
+1.1.2 void thermal_zone_device_unregister(struct thermal_zone_device *tz)
+
+ This interface function removes the thermal zone device.
+ It deletes the corresponding entry form /sys/class/thermal folder and unbind all
+ the thermal cooling devices it uses.
+
+1.2 thermal cooling device interface
+1.2.1 struct thermal_cooling_device *thermal_cooling_device_register(char *name,
+ void *devdata, struct thermal_cooling_device_ops *)
+
+ This interface function adds a new thermal cooling device (fan/processor/...) to
+ /sys/class/thermal/ folder as cooling_device[0-*].
+ It tries to bind itself to all the thermal zone devices register at the same time.
+ name: the cooling device name.
+ devdata: device private data.
+ ops: thermal cooling devices callbacks.
+ .get_max_state: get the Maximum throttle state of the cooling device.
+ .get_cur_state: get the Current throttle state of the cooling device.
+ .set_cur_state: set the Current throttle state of the cooling device.
+
+1.2.2 void thermal_cooling_device_unregister(struct thermal_cooling_device *cdev)
+
+ This interface function remove the thermal cooling device.
+ It deletes the corresponding entry form /sys/class/thermal folder and unbind
+ itself from all the thermal zone devices using it.
+
+1.3 interface for binding a thermal zone device with a thermal cooling device
+1.3.1 int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz,
+ int trip, struct thermal_cooling_device *cdev);
+
+ This interface function bind a thermal cooling device to the certain trip point
+ of a thermal zone device.
+ This function is usually called in the thermal zone device .bind callback.
+ tz: the thermal zone device
+ cdev: thermal cooling device
+ trip: indicates which trip point the cooling devices is associated with
+ in this thermal zone.
+
+1.3.2 int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz,
+ int trip, struct thermal_cooling_device *cdev);
+
+ This interface function unbind a thermal cooling device from the certain trip point
+ of a thermal zone device.
+ This function is usually called in the thermal zone device .unbind callback.
+ tz: the thermal zone device
+ cdev: thermal cooling device
+ trip: indicates which trip point the cooling devices is associated with
+ in this thermal zone.
+
+2. sysfs attributes structure
+
+RO read only value
+RW read/write value
+
+All thermal sysfs attributes will be represented under /sys/class/thermal
+/sys/class/thermal/
+
+Thermal zone device sys I/F, created once it's registered:
+|thermal_zone[0-*]:
+ |-----type: Type of the thermal zone
+ |-----temp: Current temperature
+ |-----mode: Working mode of the thermal zone
+ |-----trip_point_[0-*]_temp: Trip point temperature
+ |-----trip_point_[0-*]_type: Trip point type
+
+Thermal cooling device sys I/F, created once it's registered:
+|cooling_device[0-*]:
+ |-----type : Type of the cooling device(processor/fan/...)
+ |-----max_state: Maximum cooling state of the cooling device
+ |-----cur_state: Current cooling state of the cooling device
+
+
+These two dynamic attributes are created/removed in pairs.
+They represent the relationship between a thermal zone and its associated cooling device.
+They are created/removed for each
+thermal_zone_bind_cooling_device/thermal_zone_unbind_cooling_device successful exection.
+
+|thermal_zone[0-*]
+ |-----cdev[0-*]: The [0-*]th cooling device in the current thermal zone
+ |-----cdev[0-*]_trip_point: Trip point that cdev[0-*] is associated with
+
+
+***************************
+* Thermal zone attributes *
+***************************
+
+type Strings which represent the thermal zone type.
+ This is given by thermal zone driver as part of registration.
+ Eg: "ACPI thermal zone" indicates it's a ACPI thermal device
+ RO
+ Optional
+
+temp Current temperature as reported by thermal zone (sensor)
+ Unit: degree celsius
+ RO
+ Required
+
+mode One of the predifned values in [kernel, user]
+ This file gives information about the algorithm
+ that is currently managing the thermal zone.
+ It can be either default kernel based algorithm
+ or user space application.
+ RW
+ Optional
+ kernel = Thermal management in kernel thermal zone driver.
+ user = Preventing kernel thermal zone driver actions upon
+ trip points so that user application can take full
+ charge of the thermal management.
+
+trip_point_[0-*]_temp The temperature above which trip point will be fired
+ Unit: degree celsius
+ RO
+ Optional
+
+trip_point_[0-*]_type Strings which indicate the type of the trip point
+ Eg. it can be one of critical, hot, passive,
+ active[0-*] for ACPI thermal zone.
+ RO
+ Optional
+
+cdev[0-*] Sysfs link to the thermal cooling device node where the sys I/F
+ for cooling device throttling control represents.
+ RO
+ Optional
+
+cdev[0-*]_trip_point The trip point with which cdev[0-*] is assocated in this thermal zone
+ -1 means the cooling device is not associated with any trip point.
+ RO
+ Optional
+
+******************************
+* Cooling device attributes *
+******************************
+
+type String which represents the type of device
+ eg: For generic ACPI: this should be "Fan",
+ "Processor" or "LCD"
+ eg. For memory controller device on intel_menlow platform:
+ this should be "Memory controller"
+ RO
+ Optional
+
+max_state The maximum permissible cooling state of this cooling device.
+ RO
+ Required
+
+cur_state The current cooling state of this cooling device.
+ the value can any integer numbers between 0 and max_state,
+ cur_state == 0 means no cooling
+ cur_state == max_state means the maximum cooling.
+ RW
+ Required
+
+3. A simple implementation
+
+ACPI thermal zone may support multiple trip points like critical/hot/passive/active.
+If an ACPI thermal zone supports critical, passive, active[0] and active[1] at the same time,
+it may register itself as a thermale_zone_device (thermal_zone1) with 4 trip points in all.
+It has one processor and one fan, which are both registered as thermal_cooling_device.
+If the processor is listed in _PSL method, and the fan is listed in _AL0 method,
+the sys I/F structure will be built like this:
+
+/sys/class/thermal:
+
+|thermal_zone1:
+ |-----type: ACPI thermal zone
+ |-----temp: 37
+ |-----mode: kernel
+ |-----trip_point_0_temp: 100
+ |-----trip_point_0_type: critical
+ |-----trip_point_1_temp: 80
+ |-----trip_point_1_type: passive
+ |-----trip_point_2_temp: 70
+ |-----trip_point_2_type: active[0]
+ |-----trip_point_3_temp: 60
+ |-----trip_point_3_type: active[1]
+ |-----cdev0: --->/sys/class/thermal/cooling_device0
+ |-----cdev0_trip_point: 1 /* cdev0 can be used for passive */
+ |-----cdev1: --->/sys/class/thermal/cooling_device3
+ |-----cdev1_trip_point: 2 /* cdev1 can be used for active[0]*/
+
+|cooling_device0:
+ |-----type: Processor
+ |-----max_state: 8
+ |-----cur_state: 0
+
+|cooling_device3:
+ |-----type: Fan
+ |-----max_state: 2
+ |-----cur_state: 0
diff --git a/Documentation/thinkpad-acpi.txt b/Documentation/thinkpad-acpi.txt
index 10c041ca13c7..6c2477754a2a 100644
--- a/Documentation/thinkpad-acpi.txt
+++ b/Documentation/thinkpad-acpi.txt
@@ -1,7 +1,7 @@
ThinkPad ACPI Extras Driver
- Version 0.17
- October 04th, 2007
+ Version 0.19
+ January 06th, 2008
Borislav Deianov <borislav@users.sf.net>
Henrique de Moraes Holschuh <hmh@hmh.eng.br>
@@ -215,6 +215,11 @@ The following commands can be written to the /proc/acpi/ibm/hotkey file:
... any other 8-hex-digit mask ...
echo reset > /proc/acpi/ibm/hotkey -- restore the original mask
+The procfs interface does not support NVRAM polling control. So as to
+maintain maximum bug-to-bug compatibility, it does not report any masks,
+nor does it allow one to manipulate the hot key mask when the firmware
+does not support masks at all, even if NVRAM polling is in use.
+
sysfs notes:
hotkey_bios_enabled:
@@ -231,17 +236,26 @@ sysfs notes:
to this value.
hotkey_enable:
- Enables/disables the hot keys feature, and reports
- current status of the hot keys feature.
+ Enables/disables the hot keys feature in the ACPI
+ firmware, and reports current status of the hot keys
+ feature. Has no effect on the NVRAM hot key polling
+ functionality.
0: disables the hot keys feature / feature disabled
1: enables the hot keys feature / feature enabled
hotkey_mask:
- bit mask to enable driver-handling and ACPI event
- generation for each hot key (see above). Returns the
- current status of the hot keys mask, and allows one to
- modify it.
+ bit mask to enable driver-handling (and depending on
+ the firmware, ACPI event generation) for each hot key
+ (see above). Returns the current status of the hot keys
+ mask, and allows one to modify it.
+
+ Note: when NVRAM polling is active, the firmware mask
+ will be different from the value returned by
+ hotkey_mask. The driver will retain enabled bits for
+ hotkeys that are under NVRAM polling even if the
+ firmware refuses them, and will not set these bits on
+ the firmware hot key mask.
hotkey_all_mask:
bit mask that should enable event reporting for all
@@ -257,12 +271,48 @@ sysfs notes:
handled by the firmware anyway. Echo it to
hotkey_mask above, to use.
+ hotkey_source_mask:
+ bit mask that selects which hot keys will the driver
+ poll the NVRAM for. This is auto-detected by the driver
+ based on the capabilities reported by the ACPI firmware,
+ but it can be overridden at runtime.
+
+ Hot keys whose bits are set in both hotkey_source_mask
+ and also on hotkey_mask are polled for in NVRAM. Only a
+ few hot keys are available through CMOS NVRAM polling.
+
+ Warning: when in NVRAM mode, the volume up/down/mute
+ keys are synthesized according to changes in the mixer,
+ so you have to use volume up or volume down to unmute,
+ as per the ThinkPad volume mixer user interface. When
+ in ACPI event mode, volume up/down/mute are reported as
+ separate events, but this behaviour may be corrected in
+ future releases of this driver, in which case the
+ ThinkPad volume mixer user interface semanthics will be
+ enforced.
+
+ hotkey_poll_freq:
+ frequency in Hz for hot key polling. It must be between
+ 0 and 25 Hz. Polling is only carried out when strictly
+ needed.
+
+ Setting hotkey_poll_freq to zero disables polling, and
+ will cause hot key presses that require NVRAM polling
+ to never be reported.
+
+ Setting hotkey_poll_freq too low will cause repeated
+ pressings of the same hot key to be misreported as a
+ single key press, or to not even be detected at all.
+ The recommended polling frequency is 10Hz.
+
hotkey_radio_sw:
if the ThinkPad has a hardware radio switch, this
attribute will read 0 if the switch is in the "radios
disabled" postition, and 1 if the switch is in the
"radios enabled" position.
+ This attribute has poll()/select() support.
+
hotkey_report_mode:
Returns the state of the procfs ACPI event report mode
filter for hot keys. If it is set to 1 (the default),
@@ -277,6 +327,25 @@ sysfs notes:
May return -EPERM (write access locked out by module
parameter) or -EACCES (read-only).
+ wakeup_reason:
+ Set to 1 if the system is waking up because the user
+ requested a bay ejection. Set to 2 if the system is
+ waking up because the user requested the system to
+ undock. Set to zero for normal wake-ups or wake-ups
+ due to unknown reasons.
+
+ This attribute has poll()/select() support.
+
+ wakeup_hotunplug_complete:
+ Set to 1 if the system was waken up because of an
+ undock or bay ejection request, and that request
+ was sucessfully completed. At this point, it might
+ be useful to send the system back to sleep, at the
+ user's choice. Refer to HKEY events 0x4003 and
+ 0x3003, below.
+
+ This attribute has poll()/select() support.
+
input layer notes:
A Hot key is mapped to a single input layer EV_KEY event, possibly
@@ -427,6 +496,23 @@ Non hot-key ACPI HKEY event map:
The above events are not propagated by the driver, except for legacy
compatibility purposes when hotkey_report_mode is set to 1.
+0x2304 System is waking up from suspend to undock
+0x2305 System is waking up from suspend to eject bay
+0x2404 System is waking up from hibernation to undock
+0x2405 System is waking up from hibernation to eject bay
+
+The above events are never propagated by the driver.
+
+0x3003 Bay ejection (see 0x2x05) complete, can sleep again
+0x4003 Undocked (see 0x2x04), can sleep again
+0x5009 Tablet swivel: switched to tablet mode
+0x500A Tablet swivel: switched to normal mode
+0x500B Tablet pen insterted into its storage bay
+0x500C Tablet pen removed from its storage bay
+0x5010 Brightness level changed (newer Lenovo BIOSes)
+
+The above events are propagated by the driver.
+
Compatibility notes:
ibm-acpi and thinkpad-acpi 0.15 (mainline kernels before 2.6.23) never
@@ -1263,3 +1349,17 @@ Sysfs interface changelog:
and the hwmon class for libsensors4 (lm-sensors 3)
compatibility. Moved all hwmon attributes to this
new platform device.
+
+0x020100: Marker for thinkpad-acpi with hot key NVRAM polling
+ support. If you must, use it to know you should not
+ start an userspace NVRAM poller (allows to detect when
+ NVRAM is compiled out by the user because it is
+ unneeded/undesired in the first place).
+0x020101: Marker for thinkpad-acpi with hot key NVRAM polling
+ and proper hotkey_mask semanthics (version 8 of the
+ NVRAM polling patch). Some development snapshots of
+ 0.18 had an earlier version that did strange things
+ to hotkey_mask.
+
+0x020200: Add poll()/select() support to the following attributes:
+ hotkey_radio_sw, wakeup_hotunplug_complete, wakeup_reason