docs: admin-guide: add laptops documentation

The docs under Documentation/laptops contain users specific
information.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com>

9 files changed, 0 insertions, 3288 deletions

diff --git a/Documentation/laptops/asus-laptop.rst b/Documentation/laptops/asus-laptop.rst
deleted file mode 100644
index 95176321a25a..000000000000
--- a/Documentation/laptops/asus-laptop.rst
+++ /dev/null
@@ -1,271 +0,0 @@
-==================
-Asus Laptop Extras
-==================
-
-Version 0.1
-
-August 6, 2009
-
-Corentin Chary <corentincj@iksaif.net>
-http://acpi4asus.sf.net/
-
- This driver provides support for extra features of ACPI-compatible ASUS laptops.
- It may also support some MEDION, JVC or VICTOR laptops (such as MEDION 9675 or
- VICTOR XP7210 for example). It makes all the extra buttons generate input
- events (like keyboards).
-
- On some models adds support for changing the display brightness and output,
- switching the LCD backlight on and off, and most importantly, allows you to
- blink those fancy LEDs intended for reporting mail and wireless status.
-
-This driver supersedes the old asus_acpi driver.
-
-Requirements
-------------
-
-  Kernel 2.6.X sources, configured for your computer, with ACPI support.
-  You also need CONFIG_INPUT and CONFIG_ACPI.
-
-Status
-------
-
- The features currently supported are the following (see below for
- detailed description):
-
- - Fn key combinations
- - Bluetooth enable and disable
- - Wlan enable and disable
- - GPS enable and disable
- - Video output switching
- - Ambient Light Sensor on and off
- - LED control
- - LED Display control
- - LCD brightness control
- - LCD on and off
-
- A compatibility table by model and feature is maintained on the web
- site, http://acpi4asus.sf.net/.
-
-Usage
------
-
-  Try "modprobe asus-laptop". Check your dmesg (simply type dmesg). You should
-  see some lines like this :
-
-      Asus Laptop Extras version 0.42
-        - L2D model detected.
-
-  If it is not the output you have on your laptop, send it (and the laptop's
-  DSDT) to me.
-
-  That's all, now, all the events generated by the hotkeys of your laptop
-  should be reported via netlink events. You can check with
-  "acpi_genl monitor" (part of the acpica project).
-
-  Hotkeys are also reported as input keys (like keyboards) you can check
-  which key are supported using "xev" under X11.
-
-  You can get information on the version of your DSDT table by reading the
-  /sys/devices/platform/asus-laptop/infos entry. If you have a question or a
-  bug report to do, please include the output of this entry.
-
-LEDs
-----
-
-  You can modify LEDs be echoing values to `/sys/class/leds/asus/*/brightness`::
-
-    echo 1 >  /sys/class/leds/asus::mail/brightness
-
-  will switch the mail LED on.
-
-  You can also know if they are on/off by reading their content and use
-  kernel triggers like disk-activity or heartbeat.
-
-Backlight
----------
-
-  You can control lcd backlight power and brightness with
-  /sys/class/backlight/asus-laptop/. Brightness Values are between 0 and 15.
-
-Wireless devices
-----------------
-
-  You can turn the internal Bluetooth adapter on/off with the bluetooth entry
-  (only on models with Bluetooth). This usually controls the associated LED.
-  Same for Wlan adapter.
-
-Display switching
------------------
-
-  Note: the display switching code is currently considered EXPERIMENTAL.
-
-  Switching works for the following models:
-
-    - L3800C
-    - A2500H
-    - L5800C
-    - M5200N
-    - W1000N (albeit with some glitches)
-    - M6700R
-    - A6JC
-    - F3J
-
-  Switching doesn't work for the following:
-
-    - M3700N
-    - L2X00D (locks the laptop under certain conditions)
-
-  To switch the displays, echo values from 0 to 15 to
-  /sys/devices/platform/asus-laptop/display. The significance of those values
-  is as follows:
-
-  +-------+-----+-----+-----+-----+-----+
-  | Bin   | Val | DVI | TV  | CRT | LCD |
-  +-------+-----+-----+-----+-----+-----+
-  | 0000  |   0 |     |     |     |     |
-  +-------+-----+-----+-----+-----+-----+
-  | 0001  |   1 |     |     |     |  X  |
-  +-------+-----+-----+-----+-----+-----+
-  | 0010  |   2 |     |     |  X  |     |
-  +-------+-----+-----+-----+-----+-----+
-  | 0011  |   3 |     |     |  X  |  X  |
-  +-------+-----+-----+-----+-----+-----+
-  | 0100  |   4 |     |  X  |     |     |
-  +-------+-----+-----+-----+-----+-----+
-  | 0101  |   5 |     |  X  |     | X   |
-  +-------+-----+-----+-----+-----+-----+
-  | 0110  |   6 |     |  X  |  X  |     |
-  +-------+-----+-----+-----+-----+-----+
-  | 0111  |   7 |     |  X  |  X  |  X  |
-  +-------+-----+-----+-----+-----+-----+
-  | 1000  |   8 |  X  |     |     |     |
-  +-------+-----+-----+-----+-----+-----+
-  | 1001  |   9 |  X  |     |     |  X  |
-  +-------+-----+-----+-----+-----+-----+
-  | 1010  |  10 |  X  |     |  X  |     |
-  +-------+-----+-----+-----+-----+-----+
-  | 1011  |  11 |  X  |     |  X  |  X  |
-  +-------+-----+-----+-----+-----+-----+
-  | 1100  |  12 |  X  |  X  |     |     |
-  +-------+-----+-----+-----+-----+-----+
-  | 1101  |  13 |  X  |  X  |     |  X  |
-  +-------+-----+-----+-----+-----+-----+
-  | 1110  |  14 |  X  |  X  |  X  |     |
-  +-------+-----+-----+-----+-----+-----+
-  | 1111  |  15 |  X  |  X  |  X  |  X  |
-  +-------+-----+-----+-----+-----+-----+
-
-  In most cases, the appropriate displays must be plugged in for the above
-  combinations to work. TV-Out may need to be initialized at boot time.
-
-  Debugging:
-
-  1) Check whether the Fn+F8 key:
-
-     a) does not lock the laptop (try a boot with noapic / nolapic if it does)
-     b) generates events (0x6n, where n is the value corresponding to the
-        configuration above)
-     c) actually works
-
-     Record the disp value at every configuration.
-  2) Echo values from 0 to 15 to /sys/devices/platform/asus-laptop/display.
-     Record its value, note any change. If nothing changes, try a broader range,
-     up to 65535.
-  3) Send ANY output (both positive and negative reports are needed, unless your
-     machine is already listed above) to the acpi4asus-user mailing list.
-
-  Note: on some machines (e.g. L3C), after the module has been loaded, only 0x6n
-  events are generated and no actual switching occurs. In such a case, a line
-  like::
-
-    echo $((10#$arg-60)) > /sys/devices/platform/asus-laptop/display
-
-  will usually do the trick ($arg is the 0000006n-like event passed to acpid).
-
-  Note: there is currently no reliable way to read display status on xxN
-  (Centrino) models.
-
-LED display
------------
-
-  Some models like the W1N have a LED display that can be used to display
-  several items of information.
-
-  LED display works for the following models:
-
-    - W1000N
-    - W1J
-
-  To control the LED display, use the following::
-
-    echo 0x0T000DDD > /sys/devices/platform/asus-laptop/
-
-  where T control the 3 letters display, and DDD the 3 digits display,
-  according to the tables below::
-
-         DDD (digits)
-         000 to 999 = display digits
-         AAA        = ---
-         BBB to FFF = turn-off
-
-         T  (type)
-         0 = off
-         1 = dvd
-         2 = vcd
-         3 = mp3
-         4 = cd
-         5 = tv
-         6 = cpu
-         7 = vol
-
-  For example "echo 0x01000001 >/sys/devices/platform/asus-laptop/ledd"
-  would display "DVD001".
-
-Driver options
---------------
-
- Options can be passed to the asus-laptop driver using the standard
- module argument syntax (<param>=<value> when passing the option to the
- module or asus-laptop.<param>=<value> on the kernel boot line when
- asus-laptop is statically linked into the kernel).
-
-	     wapf: WAPF defines the behavior of the Fn+Fx wlan key
-		   The significance of values is yet to be found, but
-		   most of the time:
-
-		   - 0x0 should do nothing
-		   - 0x1 should allow to control the device with Fn+Fx key.
-		   - 0x4 should send an ACPI event (0x88) while pressing the Fn+Fx key
-		   - 0x5 like 0x1 or 0x4
-
- The default value is 0x1.
-
-Unsupported models
-------------------
-
- These models will never be supported by this module, as they use a completely
- different mechanism to handle LEDs and extra stuff (meaning we have no clue
- how it works):
-
- - ASUS A1300 (A1B), A1370D
- - ASUS L7300G
- - ASUS L8400
-
-Patches, Errors, Questions
---------------------------
-
- I appreciate any success or failure
- reports, especially if they add to or correct the compatibility table.
- Please include the following information in your report:
-
- - Asus model name
- - a copy of your ACPI tables, using the "acpidump" utility
- - a copy of /sys/devices/platform/asus-laptop/infos
- - which driver features work and which don't
- - the observed behavior of non-working features
-
- Any other comments or patches are also more than welcome.
-
- acpi4asus-user@lists.sourceforge.net
-
- http://sourceforge.net/projects/acpi4asus
diff --git a/Documentation/laptops/disk-shock-protection.rst b/Documentation/laptops/disk-shock-protection.rst
deleted file mode 100644
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-==========================
-Hard disk shock protection
-==========================
-
-Author: Elias Oltmanns <eo@nebensachen.de>
-
-Last modified: 2008-10-03
-
-
-.. 0. Contents
-
-   1. Intro
-   2. The interface
-   3. References
-   4. CREDITS
-
-
-1. Intro
---------
-
-ATA/ATAPI-7 specifies the IDLE IMMEDIATE command with unload feature.
-Issuing this command should cause the drive to switch to idle mode and
-unload disk heads. This feature is being used in modern laptops in
-conjunction with accelerometers and appropriate software to implement
-a shock protection facility. The idea is to stop all I/O operations on
-the internal hard drive and park its heads on the ramp when critical
-situations are anticipated. The desire to have such a feature
-available on GNU/Linux systems has been the original motivation to
-implement a generic disk head parking interface in the Linux kernel.
-Please note, however, that other components have to be set up on your
-system in order to get disk shock protection working (see
-section 3. References below for pointers to more information about
-that).
-
-
-2. The interface
-----------------
-
-For each ATA device, the kernel exports the file
-`block/*/device/unload_heads` in sysfs (here assumed to be mounted under
-/sys). Access to `/sys/block/*/device/unload_heads` is denied with
--EOPNOTSUPP if the device does not support the unload feature.
-Otherwise, writing an integer value to this file will take the heads
-of the respective drive off the platter and block all I/O operations
-for the specified number of milliseconds. When the timeout expires and
-no further disk head park request has been issued in the meantime,
-normal operation will be resumed. The maximal value accepted for a
-timeout is 30000 milliseconds. Exceeding this limit will return
--EOVERFLOW, but heads will be parked anyway and the timeout will be
-set to 30 seconds. However, you can always change a timeout to any
-value between 0 and 30000 by issuing a subsequent head park request
-before the timeout of the previous one has expired. In particular, the
-total timeout can exceed 30 seconds and, more importantly, you can
-cancel a previously set timeout and resume normal operation
-immediately by specifying a timeout of 0. Values below -2 are rejected
-with -EINVAL (see below for the special meaning of -1 and -2). If the
-timeout specified for a recent head park request has not yet expired,
-reading from `/sys/block/*/device/unload_heads` will report the number
-of milliseconds remaining until normal operation will be resumed;
-otherwise, reading the unload_heads attribute will return 0.
-
-For example, do the following in order to park the heads of drive
-/dev/sda and stop all I/O operations for five seconds::
-
-	# echo 5000 > /sys/block/sda/device/unload_heads
-
-A simple::
-
-	# cat /sys/block/sda/device/unload_heads
-
-will show you how many milliseconds are left before normal operation
-will be resumed.
-
-A word of caution: The fact that the interface operates on a basis of
-milliseconds may raise expectations that cannot be satisfied in
-reality. In fact, the ATA specs clearly state that the time for an
-unload operation to complete is vendor specific. The hint in ATA-7
-that this will typically be within 500 milliseconds apparently has
-been dropped in ATA-8.
-
-There is a technical detail of this implementation that may cause some
-confusion and should be discussed here. When a head park request has
-been issued to a device successfully, all I/O operations on the
-controller port this device is attached to will be deferred. That is
-to say, any other device that may be connected to the same port will
-be affected too. The only exception is that a subsequent head unload
-request to that other device will be executed immediately. Further
-operations on that port will be deferred until the timeout specified
-for either device on the port has expired. As far as PATA (old style
-IDE) configurations are concerned, there can only be two devices
-attached to any single port. In SATA world we have port multipliers
-which means that a user-issued head parking request to one device may
-actually result in stopping I/O to a whole bunch of devices. However,
-since this feature is supposed to be used on laptops and does not seem
-to be very useful in any other environment, there will be mostly one
-device per port. Even if the CD/DVD writer happens to be connected to
-the same port as the hard drive, it generally *should* recover just
-fine from the occasional buffer under-run incurred by a head park
-request to the HD. Actually, when you are using an ide driver rather
-than its libata counterpart (i.e. your disk is called /dev/hda
-instead of /dev/sda), then parking the heads of one drive (drive X)
-will generally not affect the mode of operation of another drive
-(drive Y) on the same port as described above. It is only when a port
-reset is required to recover from an exception on drive Y that further
-I/O operations on that drive (and the reset itself) will be delayed
-until drive X is no longer in the parked state.
-
-Finally, there are some hard drives that only comply with an earlier
-version of the ATA standard than ATA-7, but do support the unload
-feature nonetheless. Unfortunately, there is no safe way Linux can
-detect these devices, so you won't be able to write to the
-unload_heads attribute. If you know that your device really does
-support the unload feature (for instance, because the vendor of your
-laptop or the hard drive itself told you so), then you can tell the
-kernel to enable the usage of this feature for that drive by writing
-the special value -1 to the unload_heads attribute::
-
-	# echo -1 > /sys/block/sda/device/unload_heads
-
-will enable the feature for /dev/sda, and giving -2 instead of -1 will
-disable it again.
-
-
-3. References
--------------
-
-There are several laptops from different vendors featuring shock
-protection capabilities. As manufacturers have refused to support open
-source development of the required software components so far, Linux
-support for shock protection varies considerably between different
-hardware implementations. Ideally, this section should contain a list
-of pointers at different projects aiming at an implementation of shock
-protection on different systems. Unfortunately, I only know of a
-single project which, although still considered experimental, is fit
-for use. Please feel free to add projects that have been the victims
-of my ignorance.
-
-- http://www.thinkwiki.org/wiki/HDAPS
-
-  See this page for information about Linux support of the hard disk
-  active protection system as implemented in IBM/Lenovo Thinkpads.
-
-
-4. CREDITS
-----------
-
-This implementation of disk head parking has been inspired by a patch
-originally published by Jon Escombe <lists@dresco.co.uk>. My efforts
-to develop an implementation of this feature that is fit to be merged
-into mainline have been aided by various kernel developers, in
-particular by Tejun Heo and Bartlomiej Zolnierkiewicz.
diff --git a/Documentation/laptops/index.rst b/Documentation/laptops/index.rst
deleted file mode 100644
index 001a30910d09..000000000000
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-:orphan:
-
-==============
-Laptop Drivers
-==============
-
-.. toctree::
-   :maxdepth: 1
-
-   asus-laptop
-   disk-shock-protection
-   laptop-mode
-   lg-laptop
-   sony-laptop
-   sonypi
-   thinkpad-acpi
-   toshiba_haps
diff --git a/Documentation/laptops/laptop-mode.rst b/Documentation/laptops/laptop-mode.rst
deleted file mode 100644
index c984c4262f2e..000000000000
--- a/Documentation/laptops/laptop-mode.rst
+++ /dev/null
@@ -1,781 +0,0 @@
-===============================================
-How to conserve battery power using laptop-mode
-===============================================
-
-Document Author: Bart Samwel (bart@samwel.tk)
-
-Date created: January 2, 2004
-
-Last modified: December 06, 2004
-
-Introduction
-------------
-
-Laptop mode is used to minimize the time that the hard disk needs to be spun up,
-to conserve battery power on laptops. It has been reported to cause significant
-power savings.
-
-.. Contents
-
-   * Introduction
-   * Installation
-   * Caveats
-   * The Details
-   * Tips & Tricks
-   * Control script
-   * ACPI integration
-   * Monitoring tool
-
-
-Installation
-------------
-
-To use laptop mode, you don't need to set any kernel configuration options
-or anything. Simply install all the files included in this document, and
-laptop mode will automatically be started when you're on battery. For
-your convenience, a tarball containing an installer can be downloaded at:
-
-	http://www.samwel.tk/laptop_mode/laptop_mode/
-
-To configure laptop mode, you need to edit the configuration file, which is
-located in /etc/default/laptop-mode on Debian-based systems, or in
-/etc/sysconfig/laptop-mode on other systems.
-
-Unfortunately, automatic enabling of laptop mode does not work for
-laptops that don't have ACPI. On those laptops, you need to start laptop
-mode manually. To start laptop mode, run "laptop_mode start", and to
-stop it, run "laptop_mode stop". (Note: The laptop mode tools package now
-has experimental support for APM, you might want to try that first.)
-
-
-Caveats
--------
-
-* The downside of laptop mode is that you have a chance of losing up to 10
-  minutes of work. If you cannot afford this, don't use it! The supplied ACPI
-  scripts automatically turn off laptop mode when the battery almost runs out,
-  so that you won't lose any data at the end of your battery life.
-
-* Most desktop hard drives have a very limited lifetime measured in spindown
-  cycles, typically about 50.000 times (it's usually listed on the spec sheet).
-  Check your drive's rating, and don't wear down your drive's lifetime if you
-  don't need to.
-
-* If you mount some of your ext3/reiserfs filesystems with the -n option, then
-  the control script will not be able to remount them correctly. You must set
-  DO_REMOUNTS=0 in the control script, otherwise it will remount them with the
-  wrong options -- or it will fail because it cannot write to /etc/mtab.
-
-* If you have your filesystems listed as type "auto" in fstab, like I did, then
-  the control script will not recognize them as filesystems that need remounting.
-  You must list the filesystems with their true type instead.
-
-* It has been reported that some versions of the mutt mail client use file access
-  times to determine whether a folder contains new mail. If you use mutt and
-  experience this, you must disable the noatime remounting by setting the option
-  DO_REMOUNT_NOATIME to 0 in the configuration file.
-
-
-The Details
------------
-
-Laptop mode is controlled by the knob /proc/sys/vm/laptop_mode. This knob is
-present for all kernels that have the laptop mode patch, regardless of any
-configuration options. When the knob is set, any physical disk I/O (that might
-have caused the hard disk to spin up) causes Linux to flush all dirty blocks. The
-result of this is that after a disk has spun down, it will not be spun up
-anymore to write dirty blocks, because those blocks had already been written
-immediately after the most recent read operation. The value of the laptop_mode
-knob determines the time between the occurrence of disk I/O and when the flush
-is triggered. A sensible value for the knob is 5 seconds. Setting the knob to
-0 disables laptop mode.
-
-To increase the effectiveness of the laptop_mode strategy, the laptop_mode
-control script increases dirty_expire_centisecs and dirty_writeback_centisecs in
-/proc/sys/vm to about 10 minutes (by default), which means that pages that are
-dirtied are not forced to be written to disk as often. The control script also
-changes the dirty background ratio, so that background writeback of dirty pages
-is not done anymore. Combined with a higher commit value (also 10 minutes) for
-ext3 or ReiserFS filesystems (also done automatically by the control script),
-this results in concentration of disk activity in a small time interval which
-occurs only once every 10 minutes, or whenever the disk is forced to spin up by
-a cache miss. The disk can then be spun down in the periods of inactivity.
-
-If you want to find out which process caused the disk to spin up, you can
-gather information by setting the flag /proc/sys/vm/block_dump. When this flag
-is set, Linux reports all disk read and write operations that take place, and
-all block dirtyings done to files. This makes it possible to debug why a disk
-needs to spin up, and to increase battery life even more. The output of
-block_dump is written to the kernel output, and it can be retrieved using
-"dmesg". When you use block_dump and your kernel logging level also includes
-kernel debugging messages, you probably want to turn off klogd, otherwise
-the output of block_dump will be logged, causing disk activity that is not
-normally there.
-
-
-Configuration
--------------
-
-The laptop mode configuration file is located in /etc/default/laptop-mode on
-Debian-based systems, or in /etc/sysconfig/laptop-mode on other systems. It
-contains the following options:
-
-MAX_AGE:
-
-Maximum time, in seconds, of hard drive spindown time that you are
-comfortable with. Worst case, it's possible that you could lose this
-amount of work if your battery fails while you're in laptop mode.
-
-MINIMUM_BATTERY_MINUTES:
-
-Automatically disable laptop mode if the remaining number of minutes of
-battery power is less than this value. Default is 10 minutes.
-
-AC_HD/BATT_HD:
-
-The idle timeout that should be set on your hard drive when laptop mode
-is active (BATT_HD) and when it is not active (AC_HD). The defaults are
-20 seconds (value 4) for BATT_HD  and 2 hours (value 244) for AC_HD. The
-possible values are those listed in the manual page for "hdparm" for the
-"-S" option.
-
-HD:
-
-The devices for which the spindown timeout should be adjusted by laptop mode.
-Default is /dev/hda. If you specify multiple devices, separate them by a space.
-
-READAHEAD:
-
-Disk readahead, in 512-byte sectors, while laptop mode is active. A large
-readahead can prevent disk accesses for things like executable pages (which are
-loaded on demand while the application executes) and sequentially accessed data
-(MP3s).
-
-DO_REMOUNTS:
-
-The control script automatically remounts any mounted journaled filesystems
-with appropriate commit interval options. When this option is set to 0, this
-feature is disabled.
-
-DO_REMOUNT_NOATIME:
-
-When remounting, should the filesystems be remounted with the noatime option?
-Normally, this is set to "1" (enabled), but there may be programs that require
-access time recording.
-
-DIRTY_RATIO:
-
-The percentage of memory that is allowed to contain "dirty" or unsaved data
-before a writeback is forced, while laptop mode is active. Corresponds to
-the /proc/sys/vm/dirty_ratio sysctl.
-
-DIRTY_BACKGROUND_RATIO:
-
-The percentage of memory that is allowed to contain "dirty" or unsaved data
-after a forced writeback is done due to an exceeding of DIRTY_RATIO. Set
-this nice and low. This corresponds to the /proc/sys/vm/dirty_background_ratio
-sysctl.
-
-Note that the behaviour of dirty_background_ratio is quite different
-when laptop mode is active and when it isn't. When laptop mode is inactive,
-dirty_background_ratio is the threshold percentage at which background writeouts
-start taking place. When laptop mode is active, however, background writeouts
-are disabled, and the dirty_background_ratio only determines how much writeback
-is done when dirty_ratio is reached.
-
-DO_CPU:
-
-Enable CPU frequency scaling when in laptop mode. (Requires CPUFreq to be setup.
-See Documentation/admin-guide/pm/cpufreq.rst for more info. Disabled by default.)
-
-CPU_MAXFREQ:
-
-When on battery, what is the maximum CPU speed that the system should use? Legal
-values are "slowest" for the slowest speed that your CPU is able to operate at,
-or a value listed in /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies.
-
-
-Tips & Tricks
--------------
-
-* Bartek Kania reports getting up to 50 minutes of extra battery life (on top
-  of his regular 3 to 3.5 hours) using a spindown time of 5 seconds (BATT_HD=1).
-
-* You can spin down the disk while playing MP3, by setting disk readahead
-  to 8MB (READAHEAD=16384). Effectively, the disk will read a complete MP3 at
-  once, and will then spin down while the MP3 is playing. (Thanks to Bartek
-  Kania.)
-
-* Drew Scott Daniels observed: "I don't know why, but when I decrease the number
-  of colours that my display uses it consumes less battery power. I've seen
-  this on powerbooks too. I hope that this is a piece of information that
-  might be useful to the Laptop Mode patch or its users."
-
-* In syslog.conf, you can prefix entries with a dash `-` to omit syncing the
-  file after every logging. When you're using laptop-mode and your disk doesn't
-  spin down, this is a likely culprit.
-
-* Richard Atterer observed that laptop mode does not work well with noflushd
-  (http://noflushd.sourceforge.net/), it seems that noflushd prevents laptop-mode
-  from doing its thing.
-
-* If you're worried about your data, you might want to consider using a USB
-  memory stick or something like that as a "working area". (Be aware though
-  that flash memory can only handle a limited number of writes, and overuse
-  may wear out your memory stick pretty quickly. Do _not_ use journalling
-  filesystems on flash memory sticks.)
-
-
-Configuration file for control and ACPI battery scripts
--------------------------------------------------------
-
-This allows the tunables to be changed for the scripts via an external
-configuration file
-
-It should be installed as /etc/default/laptop-mode on Debian, and as
-/etc/sysconfig/laptop-mode on Red Hat, SUSE, Mandrake, and other work-alikes.
-
-Config file::
-
-  # Maximum time, in seconds, of hard drive spindown time that you are
-  # comfortable with. Worst case, it's possible that you could lose this
-  # amount of work if your battery fails you while in laptop mode.
-  #MAX_AGE=600
-
-  # Automatically disable laptop mode when the number of minutes of battery
-  # that you have left goes below this threshold.
-  MINIMUM_BATTERY_MINUTES=10
-
-  # Read-ahead, in 512-byte sectors. You can spin down the disk while playing MP3/OGG
-  # by setting the disk readahead to 8MB (READAHEAD=16384). Effectively, the disk
-  # will read a complete MP3 at once, and will then spin down while the MP3/OGG is
-  # playing.
-  #READAHEAD=4096
-
-  # Shall we remount journaled fs. with appropriate commit interval? (1=yes)
-  #DO_REMOUNTS=1
-
-  # And shall we add the "noatime" option to that as well? (1=yes)
-  #DO_REMOUNT_NOATIME=1
-
-  # Dirty synchronous ratio.  At this percentage of dirty pages the process
-  # which
-  # calls write() does its own writeback
-  #DIRTY_RATIO=40
-
-  #
-  # Allowed dirty background ratio, in percent.  Once DIRTY_RATIO has been
-  # exceeded, the kernel will wake flusher threads which will then reduce the
-  # amount of dirty memory to dirty_background_ratio.  Set this nice and low,
-  # so once some writeout has commenced, we do a lot of it.
-  #
-  #DIRTY_BACKGROUND_RATIO=5
-
-  # kernel default dirty buffer age
-  #DEF_AGE=30
-  #DEF_UPDATE=5
-  #DEF_DIRTY_BACKGROUND_RATIO=10
-  #DEF_DIRTY_RATIO=40
-  #DEF_XFS_AGE_BUFFER=15
-  #DEF_XFS_SYNC_INTERVAL=30
-  #DEF_XFS_BUFD_INTERVAL=1
-
-  # This must be adjusted manually to the value of HZ in the running kernel
-  # on 2.4, until the XFS people change their 2.4 external interfaces to work in
-  # centisecs. This can be automated, but it's a work in progress that still
-  # needs# some fixes. On 2.6 kernels, XFS uses USER_HZ instead of HZ for
-  # external interfaces, and that is currently always set to 100. So you don't
-  # need to change this on 2.6.
-  #XFS_HZ=100
-
-  # Should the maximum CPU frequency be adjusted down while on battery?
-  # Requires CPUFreq to be setup.
-  # See Documentation/admin-guide/pm/cpufreq.rst for more info
-  #DO_CPU=0
-
-  # When on battery what is the maximum CPU speed that the system should
-  # use? Legal values are "slowest" for the slowest speed that your
-  # CPU is able to operate at, or a value listed in:
-  # /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies
-  # Only applicable if DO_CPU=1.
-  #CPU_MAXFREQ=slowest
-
-  # Idle timeout for your hard drive (man hdparm for valid values, -S option)
-  # Default is 2 hours on AC (AC_HD=244) and 20 seconds for battery (BATT_HD=4).
-  #AC_HD=244
-  #BATT_HD=4
-
-  # The drives for which to adjust the idle timeout. Separate them by a space,
-  # e.g. HD="/dev/hda /dev/hdb".
-  #HD="/dev/hda"
-
-  # Set the spindown timeout on a hard drive?
-  #DO_HD=1
-
-
-Control script
---------------
-
-Please note that this control script works for the Linux 2.4 and 2.6 series (thanks
-to Kiko Piris).
-
-Control script::
-
-  #!/bin/bash
-
-  # start or stop laptop_mode, best run by a power management daemon when
-  # ac gets connected/disconnected from a laptop
-  #
-  # install as /sbin/laptop_mode
-  #
-  # Contributors to this script:   Kiko Piris
-  #				 Bart Samwel
-  #				 Micha Feigin
-  #				 Andrew Morton
-  #				 Herve Eychenne
-  #				 Dax Kelson
-  #
-  # Original Linux 2.4 version by: Jens Axboe
-
-  #############################################################################
-
-  # Source config
-  if [ -f /etc/default/laptop-mode ] ; then
-	# Debian
-	. /etc/default/laptop-mode
-  elif [ -f /etc/sysconfig/laptop-mode ] ; then
-	# Others
-          . /etc/sysconfig/laptop-mode
-  fi
-
-  # Don't raise an error if the config file is incomplete
-  # set defaults instead:
-
-  # Maximum time, in seconds, of hard drive spindown time that you are
-  # comfortable with. Worst case, it's possible that you could lose this
-  # amount of work if your battery fails you while in laptop mode.
-  MAX_AGE=${MAX_AGE:-'600'}
-
-  # Read-ahead, in kilobytes
-  READAHEAD=${READAHEAD:-'4096'}
-
-  # Shall we remount journaled fs. with appropriate commit interval? (1=yes)
-  DO_REMOUNTS=${DO_REMOUNTS:-'1'}
-
-  # And shall we add the "noatime" option to that as well? (1=yes)
-  DO_REMOUNT_NOATIME=${DO_REMOUNT_NOATIME:-'1'}
-
-  # Shall we adjust the idle timeout on a hard drive?
-  DO_HD=${DO_HD:-'1'}
-
-  # Adjust idle timeout on which hard drive?
-  HD="${HD:-'/dev/hda'}"
-
-  # spindown time for HD (hdparm -S values)
-  AC_HD=${AC_HD:-'244'}
-  BATT_HD=${BATT_HD:-'4'}
-
-  # Dirty synchronous ratio.  At this percentage of dirty pages the process which
-  # calls write() does its own writeback
-  DIRTY_RATIO=${DIRTY_RATIO:-'40'}
-
-  # cpu frequency scaling
-  # See Documentation/admin-guide/pm/cpufreq.rst for more info
-  DO_CPU=${CPU_MANAGE:-'0'}
-  CPU_MAXFREQ=${CPU_MAXFREQ:-'slowest'}
-
-  #
-  # Allowed dirty background ratio, in percent.  Once DIRTY_RATIO has been
-  # exceeded, the kernel will wake flusher threads which will then reduce the
-  # amount of dirty memory to dirty_background_ratio.  Set this nice and low,
-  # so once some writeout has commenced, we do a lot of it.
-  #
-  DIRTY_BACKGROUND_RATIO=${DIRTY_BACKGROUND_RATIO:-'5'}
-
-  # kernel default dirty buffer age
-  DEF_AGE=${DEF_AGE:-'30'}
-  DEF_UPDATE=${DEF_UPDATE:-'5'}
-  DEF_DIRTY_BACKGROUND_RATIO=${DEF_DIRTY_BACKGROUND_RATIO:-'10'}
-  DEF_DIRTY_RATIO=${DEF_DIRTY_RATIO:-'40'}
-  DEF_XFS_AGE_BUFFER=${DEF_XFS_AGE_BUFFER:-'15'}
-  DEF_XFS_SYNC_INTERVAL=${DEF_XFS_SYNC_INTERVAL:-'30'}
-  DEF_XFS_BUFD_INTERVAL=${DEF_XFS_BUFD_INTERVAL:-'1'}
-
-  # This must be adjusted manually to the value of HZ in the running kernel
-  # on 2.4, until the XFS people change their 2.4 external interfaces to work in
-  # centisecs. This can be automated, but it's a work in progress that still needs
-  # some fixes. On 2.6 kernels, XFS uses USER_HZ instead of HZ for external
-  # interfaces, and that is currently always set to 100. So you don't need to
-  # change this on 2.6.
-  XFS_HZ=${XFS_HZ:-'100'}
-
-  #############################################################################
-
-  KLEVEL="$(uname -r |
-               {
-	       IFS='.' read a b c
-	       echo $a.$b
-	     }
-  )"
-  case "$KLEVEL" in
-	"2.4"|"2.6")
-		;;
-	*)
-		echo "Unhandled kernel version: $KLEVEL ('uname -r' = '$(uname -r)')" >&2
-		exit 1
-		;;
-  esac
-
-  if [ ! -e /proc/sys/vm/laptop_mode ] ; then
-	echo "Kernel is not patched with laptop_mode patch." >&2
-	exit 1
-  fi
-
-  if [ ! -w /proc/sys/vm/laptop_mode ] ; then
-	echo "You do not have enough privileges to enable laptop_mode." >&2
-	exit 1
-  fi
-
-  # Remove an option (the first parameter) of the form option=<number> from
-  # a mount options string (the rest of the parameters).
-  parse_mount_opts () {
-	OPT="$1"
-	shift
-	echo ",$*," | sed		\
-	 -e 's/,'"$OPT"'=[0-9]*,/,/g'	\
-	 -e 's/,,*/,/g'			\
-	 -e 's/^,//'			\
-	 -e 's/,$//'
-  }
-
-  # Remove an option (the first parameter) without any arguments from
-  # a mount option string (the rest of the parameters).
-  parse_nonumber_mount_opts () {
-	OPT="$1"
-	shift
-	echo ",$*," | sed		\
-	 -e 's/,'"$OPT"',/,/g'		\
-	 -e 's/,,*/,/g'			\
-	 -e 's/^,//'			\
-	 -e 's/,$//'
-  }
-
-  # Find out the state of a yes/no option (e.g. "atime"/"noatime") in
-  # fstab for a given filesystem, and use this state to replace the
-  # value of the option in another mount options string. The device
-  # is the first argument, the option name the second, and the default
-  # value the third. The remainder is the mount options string.
-  #
-  # Example:
-  # parse_yesno_opts_wfstab /dev/hda1 atime atime defaults,noatime
-  #
-  # If fstab contains, say, "rw" for this filesystem, then the result
-  # will be "defaults,atime".
-  parse_yesno_opts_wfstab () {
-	L_DEV="$1"
-	OPT="$2"
-	DEF_OPT="$3"
-	shift 3
-	L_OPTS="$*"
-	PARSEDOPTS1="$(parse_nonumber_mount_opts $OPT $L_OPTS)"
-	PARSEDOPTS1="$(parse_nonumber_mount_opts no$OPT $PARSEDOPTS1)"
-	# Watch for a default atime in fstab
-	FSTAB_OPTS="$(awk '$1 == "'$L_DEV'" { print $4 }' /etc/fstab)"
-	if echo "$FSTAB_OPTS" | grep "$OPT" > /dev/null ; then
-		# option specified in fstab: extract the value and use it
-		if echo "$FSTAB_OPTS" | grep "no$OPT" > /dev/null ; then
-			echo "$PARSEDOPTS1,no$OPT"
-		else
-			# no$OPT not found -- so we must have $OPT.
-			echo "$PARSEDOPTS1,$OPT"
-		fi
-	else
-		# option not specified in fstab -- choose the default.
-		echo "$PARSEDOPTS1,$DEF_OPT"
-	fi
-  }
-
-  # Find out the state of a numbered option (e.g. "commit=NNN") in
-  # fstab for a given filesystem, and use this state to replace the
-  # value of the option in another mount options string. The device
-  # is the first argument, and the option name the second. The
-  # remainder is the mount options string in which the replacement
-  # must be done.
-  #
-  # Example:
-  # parse_mount_opts_wfstab /dev/hda1 commit defaults,commit=7
-  #
-  # If fstab contains, say, "commit=3,rw" for this filesystem, then the
-  # result will be "rw,commit=3".
-  parse_mount_opts_wfstab () {
-	L_DEV="$1"
-	OPT="$2"
-	shift 2
-	L_OPTS="$*"
-	PARSEDOPTS1="$(parse_mount_opts $OPT $L_OPTS)"
-	# Watch for a default commit in fstab
-	FSTAB_OPTS="$(awk '$1 == "'$L_DEV'" { print $4 }' /etc/fstab)"
-	if echo "$FSTAB_OPTS" | grep "$OPT=" > /dev/null ; then
-		# option specified in fstab: extract the value, and use it
-		echo -n "$PARSEDOPTS1,$OPT="
-		echo ",$FSTAB_OPTS," | sed \
-		 -e 's/.*,'"$OPT"'=//'	\
-		 -e 's/,.*//'
-	else
-		# option not specified in fstab: set it to 0
-		echo "$PARSEDOPTS1,$OPT=0"
-	fi
-  }
-
-  deduce_fstype () {
-	MP="$1"
-	# My root filesystem unfortunately has
-	# type "unknown" in /etc/mtab. If we encounter
-	# "unknown", we try to get the type from fstab.
-	cat /etc/fstab |
-	grep -v '^#' |
-	while read FSTAB_DEV FSTAB_MP FSTAB_FST FSTAB_OPTS FSTAB_DUMP FSTAB_DUMP ; do
-		if [ "$FSTAB_MP" = "$MP" ]; then
-			echo $FSTAB_FST
-			exit 0
-		fi
-	done
-  }
-
-  if [ $DO_REMOUNT_NOATIME -eq 1 ] ; then
-	NOATIME_OPT=",noatime"
-  fi
-
-  case "$1" in
-	start)
-		AGE=$((100*$MAX_AGE))
-		XFS_AGE=$(($XFS_HZ*$MAX_AGE))
-		echo -n "Starting laptop_mode"
-
-		if [ -d /proc/sys/vm/pagebuf ] ; then
-			# (For 2.4 and early 2.6.)
-			# This only needs to be set, not reset -- it is only used when
-			# laptop mode is enabled.
-			echo $XFS_AGE > /proc/sys/vm/pagebuf/lm_flush_age
-			echo $XFS_AGE > /proc/sys/fs/xfs/lm_sync_interval
-		elif [ -f /proc/sys/fs/xfs/lm_age_buffer ] ; then
-			# (A couple of early 2.6 laptop mode patches had these.)
-			# The same goes for these.
-			echo $XFS_AGE > /proc/sys/fs/xfs/lm_age_buffer
-			echo $XFS_AGE > /proc/sys/fs/xfs/lm_sync_interval
-		elif [ -f /proc/sys/fs/xfs/age_buffer ] ; then
-			# (2.6.6)
-			# But not for these -- they are also used in normal
-			# operation.
-			echo $XFS_AGE > /proc/sys/fs/xfs/age_buffer
-			echo $XFS_AGE > /proc/sys/fs/xfs/sync_interval
-		elif [ -f /proc/sys/fs/xfs/age_buffer_centisecs ] ; then
-			# (2.6.7 upwards)
-			# And not for these either. These are in centisecs,
-			# not USER_HZ, so we have to use $AGE, not $XFS_AGE.
-			echo $AGE > /proc/sys/fs/xfs/age_buffer_centisecs
-			echo $AGE > /proc/sys/fs/xfs/xfssyncd_centisecs
-			echo 3000 > /proc/sys/fs/xfs/xfsbufd_centisecs
-		fi
-
-		case "$KLEVEL" in
-			"2.4")
-				echo 1					> /proc/sys/vm/laptop_mode
-				echo "30 500 0 0 $AGE $AGE 60 20 0"	> /proc/sys/vm/bdflush
-				;;
-			"2.6")
-				echo 5					> /proc/sys/vm/laptop_mode
-				echo "$AGE"				> /proc/sys/vm/dirty_writeback_centisecs
-				echo "$AGE"				> /proc/sys/vm/dirty_expire_centisecs
-				echo "$DIRTY_RATIO"			> /proc/sys/vm/dirty_ratio
-				echo "$DIRTY_BACKGROUND_RATIO"		> /proc/sys/vm/dirty_background_ratio
-				;;
-		esac
-		if [ $DO_REMOUNTS -eq 1 ]; then
-			cat /etc/mtab | while read DEV MP FST OPTS DUMP PASS ; do
-				PARSEDOPTS="$(parse_mount_opts "$OPTS")"
-				if [ "$FST" = 'unknown' ]; then
-					FST=$(deduce_fstype $MP)
-				fi
-				case "$FST" in
-					"ext3"|"reiserfs")
-						PARSEDOPTS="$(parse_mount_opts commit "$OPTS")"
-						mount $DEV -t $FST $MP -o remount,$PARSEDOPTS,commit=$MAX_AGE$NOATIME_OPT
-						;;
-					"xfs")
-						mount $DEV -t $FST $MP -o remount,$OPTS$NOATIME_OPT
-						;;
-				esac
-				if [ -b $DEV ] ; then
-					blockdev --setra $(($READAHEAD * 2)) $DEV
-				fi
-			done
-		fi
-		if [ $DO_HD -eq 1 ] ; then
-			for THISHD in $HD ; do
-				/sbin/hdparm -S $BATT_HD $THISHD > /dev/null 2>&1
-				/sbin/hdparm -B 1 $THISHD > /dev/null 2>&1
-			done
-		fi
-		if [ $DO_CPU -eq 1 -a -e /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq ]; then
-			if [ $CPU_MAXFREQ = 'slowest' ]; then
-				CPU_MAXFREQ=`cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq`
-			fi
-			echo $CPU_MAXFREQ > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
-		fi
-		echo "."
-		;;
-	stop)
-		U_AGE=$((100*$DEF_UPDATE))
-		B_AGE=$((100*$DEF_AGE))
-		echo -n "Stopping laptop_mode"
-		echo 0 > /proc/sys/vm/laptop_mode
-		if [ -f /proc/sys/fs/xfs/age_buffer -a ! -f /proc/sys/fs/xfs/lm_age_buffer ] ; then
-			# These need to be restored, if there are no lm_*.
-			echo $(($XFS_HZ*$DEF_XFS_AGE_BUFFER))	 	> /proc/sys/fs/xfs/age_buffer
-			echo $(($XFS_HZ*$DEF_XFS_SYNC_INTERVAL)) 	> /proc/sys/fs/xfs/sync_interval
-		elif [ -f /proc/sys/fs/xfs/age_buffer_centisecs ] ; then
-			# These need to be restored as well.
-			echo $((100*$DEF_XFS_AGE_BUFFER))	> /proc/sys/fs/xfs/age_buffer_centisecs
-			echo $((100*$DEF_XFS_SYNC_INTERVAL))	> /proc/sys/fs/xfs/xfssyncd_centisecs
-			echo $((100*$DEF_XFS_BUFD_INTERVAL))	> /proc/sys/fs/xfs/xfsbufd_centisecs
-		fi
-		case "$KLEVEL" in
-			"2.4")
-				echo "30 500 0 0 $U_AGE $B_AGE 60 20 0"	> /proc/sys/vm/bdflush
-				;;
-			"2.6")
-				echo "$U_AGE"				> /proc/sys/vm/dirty_writeback_centisecs
-				echo "$B_AGE"				> /proc/sys/vm/dirty_expire_centisecs
-				echo "$DEF_DIRTY_RATIO"			> /proc/sys/vm/dirty_ratio
-				echo "$DEF_DIRTY_BACKGROUND_RATIO"	> /proc/sys/vm/dirty_background_ratio
-				;;
-		esac
-		if [ $DO_REMOUNTS -eq 1 ] ; then
-			cat /etc/mtab | while read DEV MP FST OPTS DUMP PASS ; do
-				# Reset commit and atime options to defaults.
-				if [ "$FST" = 'unknown' ]; then
-					FST=$(deduce_fstype $MP)
-				fi
-				case "$FST" in
-					"ext3"|"reiserfs")
-						PARSEDOPTS="$(parse_mount_opts_wfstab $DEV commit $OPTS)"
-						PARSEDOPTS="$(parse_yesno_opts_wfstab $DEV atime atime $PARSEDOPTS)"
-						mount $DEV -t $FST $MP -o remount,$PARSEDOPTS
-						;;
-					"xfs")
-						PARSEDOPTS="$(parse_yesno_opts_wfstab $DEV atime atime $OPTS)"
-						mount $DEV -t $FST $MP -o remount,$PARSEDOPTS
-						;;
-				esac
-				if [ -b $DEV ] ; then
-					blockdev --setra 256 $DEV
-				fi
-			done
-		fi
-		if [ $DO_HD -eq 1 ] ; then
-			for THISHD in $HD ; do
-				/sbin/hdparm -S $AC_HD $THISHD > /dev/null 2>&1
-				/sbin/hdparm -B 255 $THISHD > /dev/null 2>&1
-			done
-		fi
-		if [ $DO_CPU -eq 1 -a -e /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq ]; then
-			echo `cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq` > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
-		fi
-		echo "."
-		;;
-	*)
-		echo "Usage: $0 {start|stop}" 2>&1
-		exit 1
-		;;
-
-  esac
-
-  exit 0
-
-
-ACPI integration
-----------------
-
-Dax Kelson submitted this so that the ACPI acpid daemon will
-kick off the laptop_mode script and run hdparm. The part that
-automatically disables laptop mode when the battery is low was
-written by Jan Topinski.
-
-/etc/acpi/events/ac_adapter::
-
-	event=ac_adapter
-	action=/etc/acpi/actions/ac.sh %e
-
-/etc/acpi/events/battery::
-
-	event=battery.*
-	action=/etc/acpi/actions/battery.sh %e
-
-/etc/acpi/actions/ac.sh::
-
-  #!/bin/bash
-
-  # ac on/offline event handler
-
-  status=`awk '/^state: / { print $2 }' /proc/acpi/ac_adapter/$2/state`
-
-  case $status in
-          "on-line")
-                  /sbin/laptop_mode stop
-                  exit 0
-          ;;
-          "off-line")
-                  /sbin/laptop_mode start
-                  exit 0
-          ;;
-  esac
-
-
-/etc/acpi/actions/battery.sh::
-
-  #! /bin/bash
-
-  # Automatically disable laptop mode when the battery almost runs out.
-
-  BATT_INFO=/proc/acpi/battery/$2/state
-
-  if [[ -f /proc/sys/vm/laptop_mode ]]
-  then
-     LM=`cat /proc/sys/vm/laptop_mode`
-     if [[ $LM -gt 0 ]]
-     then
-       if [[ -f $BATT_INFO ]]
-       then
-          # Source the config file only now that we know we need
-          if [ -f /etc/default/laptop-mode ] ; then
-                  # Debian
-                  . /etc/default/laptop-mode
-          elif [ -f /etc/sysconfig/laptop-mode ] ; then
-                  # Others
-                  . /etc/sysconfig/laptop-mode
-          fi
-          MINIMUM_BATTERY_MINUTES=${MINIMUM_BATTERY_MINUTES:-'10'}
-
-          ACTION="`cat $BATT_INFO | grep charging | cut -c 26-`"
-          if [[ ACTION -eq "discharging" ]]
-          then
-             PRESENT_RATE=`cat $BATT_INFO | grep "present rate:" | sed  "s/.* \([0-9][0-9]* \).*/\1/" `
-             REMAINING=`cat $BATT_INFO | grep "remaining capacity:" | sed  "s/.* \([0-9][0-9]* \).*/\1/" `
-          fi
-          if (($REMAINING * 60 / $PRESENT_RATE < $MINIMUM_BATTERY_MINUTES))
-          then
-             /sbin/laptop_mode stop
-          fi
-       else
-         logger -p daemon.warning "You are using laptop mode and your battery interface $BATT_INFO is missing. This may lead to loss of data when the battery runs out. Check kernel ACPI support and /proc/acpi/battery folder, and edit /etc/acpi/battery.sh to set BATT_INFO to the correct path."
-       fi
-     fi
-  fi
-
-
-Monitoring tool
----------------
-
-Bartek Kania submitted this, it can be used to measure how much time your disk
-spends spun up/down.  See tools/laptop/dslm/dslm.c
diff --git a/Documentation/laptops/lg-laptop.rst b/Documentation/laptops/lg-laptop.rst
deleted file mode 100644
index f2c2ffe31101..000000000000
--- a/Documentation/laptops/lg-laptop.rst
+++ /dev/null
@@ -1,85 +0,0 @@
-.. SPDX-License-Identifier: GPL-2.0+
-
-:orphan:
-
-LG Gram laptop extra features
-=============================
-
-By Matan Ziv-Av <matan@svgalib.org>
-
-
-Hotkeys
--------
-
-The following FN keys are ignored by the kernel without this driver:
-
-- FN-F1 (LG control panel)   - Generates F15
-- FN-F5 (Touchpad toggle)    - Generates F13
-- FN-F6 (Airplane mode)      - Generates RFKILL
-- FN-F8 (Keyboard backlight) - Generates F16.
-  This key also changes keyboard backlight mode.
-- FN-F9 (Reader mode)        - Generates F14
-
-The rest of the FN keys work without a need for a special driver.
-
-
-Reader mode
------------
-
-Writing 0/1 to /sys/devices/platform/lg-laptop/reader_mode disables/enables
-reader mode. In this mode the screen colors change (blue color reduced),
-and the reader mode indicator LED (on F9 key) turns on.
-
-
-FN Lock
--------
-
-Writing 0/1 to /sys/devices/platform/lg-laptop/fn_lock disables/enables
-FN lock.
-
-
-Battery care limit
-------------------
-
-Writing 80/100 to /sys/devices/platform/lg-laptop/battery_care_limit
-sets the maximum capacity to charge the battery. Limiting the charge
-reduces battery capacity loss over time.
-
-This value is reset to 100 when the kernel boots.
-
-
-Fan mode
---------
-
-Writing 1/0 to /sys/devices/platform/lg-laptop/fan_mode disables/enables
-the fan silent mode.
-
-
-USB charge
-----------
-
-Writing 0/1 to /sys/devices/platform/lg-laptop/usb_charge disables/enables
-charging another device from the USB port while the device is turned off.
-
-This value is reset to 0 when the kernel boots.
-
-
-LEDs
-~~~~
-
-The are two LED devices supported by the driver:
-
-Keyboard backlight
-------------------
-
-A led device named kbd_led controls the keyboard backlight. There are three
-lighting level: off (0), low (127) and high (255).
-
-The keyboard backlight is also controlled by the key combination FN-F8
-which cycles through those levels.
-
-
-Touchpad indicator LED
-----------------------
-
-On the F5 key. Controlled by led device names tpad_led.
diff --git a/Documentation/laptops/sony-laptop.rst b/Documentation/laptops/sony-laptop.rst
deleted file mode 100644
index 9edcc7f6612f..000000000000
--- a/Documentation/laptops/sony-laptop.rst
+++ /dev/null
@@ -1,174 +0,0 @@
-=========================================
-Sony Notebook Control Driver (SNC) Readme
-=========================================
-
-	- Copyright (C) 2004- 2005 Stelian Pop <stelian@popies.net>
-	- Copyright (C) 2007 Mattia Dongili <malattia@linux.it>
-
-This mini-driver drives the SNC and SPIC device present in the ACPI BIOS of the
-Sony Vaio laptops. This driver mixes both devices functions under the same
-(hopefully consistent) interface. This also means that the sonypi driver is
-obsoleted by sony-laptop now.
-
-Fn keys (hotkeys):
-------------------
-
-Some models report hotkeys through the SNC or SPIC devices, such events are
-reported both through the ACPI subsystem as acpi events and through the INPUT
-subsystem. See the logs of /proc/bus/input/devices to find out what those
-events are and which input devices are created by the driver.
-Additionally, loading the driver with the debug option will report all events
-in the kernel log.
-
-The "scancodes" passed to the input system (that can be remapped with udev)
-are indexes to the table "sony_laptop_input_keycode_map" in the sony-laptop.c
-module.  For example the "FN/E" key combination (EJECTCD on some models)
-generates the scancode 20 (0x14).
-
-Backlight control:
-------------------
-If your laptop model supports it, you will find sysfs files in the
-/sys/class/backlight/sony/
-directory. You will be able to query and set the current screen
-brightness:
-
-	======================	=========================================
-	brightness		get/set screen brightness (an integer
-				between 0 and 7)
-	actual_brightness	reading from this file will query the HW
-				to get real brightness value
-	max_brightness		the maximum brightness value
-	======================	=========================================
-
-
-Platform specific:
-------------------
-Loading the sony-laptop module will create a
-/sys/devices/platform/sony-laptop/
-directory populated with some files.
-
-You then read/write integer values from/to those files by using
-standard UNIX tools.
-
-The files are:
-
-	======================	==========================================
-	brightness_default	screen brightness which will be set
-				when the laptop will be rebooted
-	cdpower			power on/off the internal CD drive
-	audiopower		power on/off the internal sound card
-	lanpower		power on/off the internal ethernet card
-				(only in debug mode)
-	bluetoothpower		power on/off the internal bluetooth device
-	fanspeed		get/set the fan speed
-	======================	==========================================
-
-Note that some files may be missing if they are not supported
-by your particular laptop model.
-
-Example usage::
-
-	# echo "1" > /sys/devices/platform/sony-laptop/brightness_default
-
-sets the lowest screen brightness for the next and later reboots
-
-::
-
-	# echo "8" > /sys/devices/platform/sony-laptop/brightness_default
-
-sets the highest screen brightness for the next and later reboots
-
-::
-
-	# cat /sys/devices/platform/sony-laptop/brightness_default
-
-retrieves the value
-
-::
-
-	# echo "0" > /sys/devices/platform/sony-laptop/audiopower
-
-powers off the sound card
-
-::
-
-	# echo "1" > /sys/devices/platform/sony-laptop/audiopower
-
-powers on the sound card.
-
-
-RFkill control:
----------------
-More recent Vaio models expose a consistent set of ACPI methods to
-control radio frequency emitting devices. If you are a lucky owner of
-such a laptop you will find the necessary rfkill devices under
-/sys/class/rfkill. Check those starting with sony-* in::
-
-	# grep . /sys/class/rfkill/*/{state,name}
-
-
-Development:
-------------
-
-If you want to help with the development of this driver (and
-you are not afraid of any side effects doing strange things with
-your ACPI BIOS could have on your laptop), load the driver and
-pass the option 'debug=1'.
-
-REPEAT:
-	**DON'T DO THIS IF YOU DON'T LIKE RISKY BUSINESS.**
-
-In your kernel logs you will find the list of all ACPI methods
-the SNC device has on your laptop.
-
-* For new models you will see a long list of meaningless method names,
-  reading the DSDT table source should reveal that:
-
-(1) the SNC device uses an internal capability lookup table
-(2) SN00 is used to find values in the lookup table
-(3) SN06 and SN07 are used to call into the real methods based on
-    offsets you can obtain iterating the table using SN00
-(4) SN02 used to enable events.
-
-Some values in the capability lookup table are more or less known, see
-the code for all sony_call_snc_handle calls, others are more obscure.
-
-* For old models you can see the GCDP/GCDP methods used to pwer on/off
-  the CD drive, but there are others and they are usually different from
-  model to model.
-
-**I HAVE NO IDEA WHAT THOSE METHODS DO.**
-
-The sony-laptop driver creates, for some of those methods (the most
-current ones found on several Vaio models), an entry under
-/sys/devices/platform/sony-laptop, just like the 'cdpower' one.
-You can create other entries corresponding to your own laptop methods by
-further editing the source (see the 'sony_nc_values' table, and add a new
-entry to this table with your get/set method names using the
-SNC_HANDLE_NAMES macro).
-
-Your mission, should you accept it, is to try finding out what
-those entries are for, by reading/writing random values from/to those
-files and find out what is the impact on your laptop.
-
-Should you find anything interesting, please report it back to me,
-I will not disavow all knowledge of your actions :)
-
-See also http://www.linux.it/~malattia/wiki/index.php/Sony_drivers for other
-useful info.
-
-Bugs/Limitations:
------------------
-
-* This driver is not based on official documentation from Sony
-  (because there is none), so there is no guarantee this driver
-  will work at all, or do the right thing. Although this hasn't
-  happened to me, this driver could do very bad things to your
-  laptop, including permanent damage.
-
-* The sony-laptop and sonypi drivers do not interact at all. In the
-  future, sonypi will be removed and replaced by sony-laptop.
-
-* spicctrl, which is the userspace tool used to communicate with the
-  sonypi driver (through /dev/sonypi) is deprecated as well since all
-  its features are now available under the sysfs tree via sony-laptop.
diff --git a/Documentation/laptops/sonypi.rst b/Documentation/laptops/sonypi.rst
deleted file mode 100644
index 2a1975ed7ee4..000000000000
--- a/Documentation/laptops/sonypi.rst
+++ /dev/null
@@ -1,160 +0,0 @@
-==================================================
-Sony Programmable I/O Control Device Driver Readme
-==================================================
-
-	- Copyright (C) 2001-2004 Stelian Pop <stelian@popies.net>
-	- Copyright (C) 2001-2002 Alcôve <www.alcove.com>
-	- Copyright (C) 2001 Michael Ashley <m.ashley@unsw.edu.au>
-	- Copyright (C) 2001 Junichi Morita <jun1m@mars.dti.ne.jp>
-	- Copyright (C) 2000 Takaya Kinjo <t-kinjo@tc4.so-net.ne.jp>
-	- Copyright (C) 2000 Andrew Tridgell <tridge@samba.org>
-
-This driver enables access to the Sony Programmable I/O Control Device which
-can be found in many Sony Vaio laptops. Some newer Sony laptops (seems to be
-limited to new FX series laptops, at least the FX501 and the FX702) lack a
-sonypi device and are not supported at all by this driver.
-
-It will give access (through a user space utility) to some events those laptops
-generate, like:
-
-	- jogdial events (the small wheel on the side of Vaios)
-	- capture button events (only on Vaio Picturebook series)
-	- Fn keys
-	- bluetooth button (only on C1VR model)
-	- programmable keys, back, help, zoom, thumbphrase buttons, etc.
-	  (when available)
-
-Those events (see linux/sonypi.h) can be polled using the character device node
-/dev/sonypi (major 10, minor auto allocated or specified as a option).
-A simple daemon which translates the jogdial movements into mouse wheel events
-can be downloaded at: <http://popies.net/sonypi/>
-
-Another option to intercept the events is to get them directly through the
-input layer.
-
-This driver supports also some ioctl commands for setting the LCD screen
-brightness and querying the batteries charge information (some more
-commands may be added in the future).
-
-This driver can also be used to set the camera controls on Picturebook series
-(brightness, contrast etc), and is used by the video4linux driver for the
-Motion Eye camera.
-
-Please note that this driver was created by reverse engineering the Windows
-driver and the ACPI BIOS, because Sony doesn't agree to release any programming
-specs for its laptops. If someone convinces them to do so, drop me a note.
-
-Driver options:
----------------
-
-Several options can be passed to the sonypi driver using the standard
-module argument syntax (<param>=<value> when passing the option to the
-module or sonypi.<param>=<value> on the kernel boot line when sonypi is
-statically linked into the kernel). Those options are:
-
-	=============== =======================================================
-	minor: 		minor number of the misc device /dev/sonypi,
-			default is -1 (automatic allocation, see /proc/misc
-			or kernel logs)
-
-	camera:		if you have a PictureBook series Vaio (with the
-			integrated MotionEye camera), set this parameter to 1
-			in order to let the driver access to the camera
-
-	fnkeyinit:	on some Vaios (C1VE, C1VR etc), the Fn key events don't
-			get enabled unless you set this parameter to 1.
-			Do not use this option unless it's actually necessary,
-			some Vaio models don't deal well with this option.
-			This option is available only if the kernel is
-			compiled without ACPI support (since it conflicts
-			with it and it shouldn't be required anyway if
-			ACPI is already enabled).
-
-	verbose:	set to 1 to print unknown events received from the
-			sonypi device.
-			set to 2 to print all events received from the
-			sonypi device.
-
-	compat:		uses some compatibility code for enabling the sonypi
-			events. If the driver worked for you in the past
-			(prior to version 1.5) and does not work anymore,
-			add this option and report to the author.
-
-	mask:		event mask telling the driver what events will be
-			reported to the user. This parameter is required for
-			some Vaio models where the hardware reuses values
-			used in other Vaio models (like the FX series who does
-			not have a jogdial but reuses the jogdial events for
-			programmable keys events). The default event mask is
-			set to 0xffffffff, meaning that all possible events
-			will be tried. You can use the following bits to
-			construct your own event mask (from
-			drivers/char/sonypi.h):
-
-				========================	======
-				SONYPI_JOGGER_MASK 		0x0001
-				SONYPI_CAPTURE_MASK 		0x0002
-				SONYPI_FNKEY_MASK 		0x0004
-				SONYPI_BLUETOOTH_MASK 		0x0008
-				SONYPI_PKEY_MASK 		0x0010
-				SONYPI_BACK_MASK 		0x0020
-				SONYPI_HELP_MASK 		0x0040
-				SONYPI_LID_MASK 		0x0080
-				SONYPI_ZOOM_MASK 		0x0100
-				SONYPI_THUMBPHRASE_MASK 	0x0200
-				SONYPI_MEYE_MASK		0x0400
-				SONYPI_MEMORYSTICK_MASK		0x0800
-				SONYPI_BATTERY_MASK		0x1000
-				SONYPI_WIRELESS_MASK		0x2000
-				========================	======
-
-	useinput:	if set (which is the default) two input devices are
-			created, one which interprets the jogdial events as
-			mouse events, the other one which acts like a
-			keyboard reporting the pressing of the special keys.
-	=============== =======================================================
-
-Module use:
------------
-
-In order to automatically load the sonypi module on use, you can put those
-lines a configuration file in /etc/modprobe.d/::
-
-	alias char-major-10-250 sonypi
-	options sonypi minor=250
-
-This supposes the use of minor 250 for the sonypi device::
-
-	# mknod /dev/sonypi c 10 250
-
-Bugs:
------
-
-	- several users reported that this driver disables the BIOS-managed
-	  Fn-keys which put the laptop in sleeping state, or switch the
-	  external monitor on/off. There is no workaround yet, since this
-	  driver disables all APM management for those keys, by enabling the
-	  ACPI management (and the ACPI core stuff is not complete yet). If
-	  you have one of those laptops with working Fn keys and want to
-	  continue to use them, don't use this driver.
-
-	- some users reported that the laptop speed is lower (dhrystone
-	  tested) when using the driver with the fnkeyinit parameter. I cannot
-	  reproduce it on my laptop and not all users have this problem.
-	  This happens because the fnkeyinit parameter enables the ACPI
-	  mode (but without additional ACPI control, like processor
-	  speed handling etc). Use ACPI instead of APM if it works on your
-	  laptop.
-
-	- sonypi lacks the ability to distinguish between certain key
-	  events on some models.
-
-	- some models with the nvidia card (geforce go 6200 tc) uses a
-	  different way to adjust the backlighting of the screen. There
-	  is a userspace utility to adjust the brightness on those models,
-	  which can be downloaded from
-	  http://www.acc.umu.se/~erikw/program/smartdimmer-0.1.tar.bz2
-
-	- since all development was done by reverse engineering, there is
-	  *absolutely no guarantee* that this driver will not crash your
-	  laptop. Permanently.
diff --git a/Documentation/laptops/thinkpad-acpi.rst b/Documentation/laptops/thinkpad-acpi.rst
deleted file mode 100644
index 19d52fc3c5e9..000000000000
--- a/Documentation/laptops/thinkpad-acpi.rst
+++ /dev/null
@@ -1,1562 +0,0 @@
-===========================
-ThinkPad ACPI Extras Driver
-===========================
-
-Version 0.25
-
-October 16th,  2013
-
-- Borislav Deianov <borislav@users.sf.net>
-- Henrique de Moraes Holschuh <hmh@hmh.eng.br>
-
-http://ibm-acpi.sf.net/
-
-This is a Linux driver for the IBM and Lenovo ThinkPad laptops. It
-supports various features of these laptops which are accessible
-through the ACPI and ACPI EC framework, but not otherwise fully
-supported by the generic Linux ACPI drivers.
-
-This driver used to be named ibm-acpi until kernel 2.6.21 and release
-0.13-20070314.  It used to be in the drivers/acpi tree, but it was
-moved to the drivers/misc tree and renamed to thinkpad-acpi for kernel
-2.6.22, and release 0.14.  It was moved to drivers/platform/x86 for
-kernel 2.6.29 and release 0.22.
-
-The driver is named "thinkpad-acpi".  In some places, like module
-names and log messages, "thinkpad_acpi" is used because of userspace
-issues.
-
-"tpacpi" is used as a shorthand where "thinkpad-acpi" would be too
-long due to length limitations on some Linux kernel versions.
-
-Status
-------
-
-The features currently supported are the following (see below for
-detailed description):
-
-	- Fn key combinations
-	- Bluetooth enable and disable
-	- video output switching, expansion control
-	- ThinkLight on and off
-	- CMOS/UCMS control
-	- LED control
-	- ACPI sounds
-	- temperature sensors
-	- Experimental: embedded controller register dump
-	- LCD brightness control
-	- Volume control
-	- Fan control and monitoring: fan speed, fan enable/disable
-	- WAN enable and disable
-	- UWB enable and disable
-
-A compatibility table by model and feature is maintained on the web
-site, http://ibm-acpi.sf.net/. I appreciate any success or failure
-reports, especially if they add to or correct the compatibility table.
-Please include the following information in your report:
-
-	- ThinkPad model name
-	- a copy of your ACPI tables, using the "acpidump" utility
-	- a copy of the output of dmidecode, with serial numbers
-	  and UUIDs masked off
-	- which driver features work and which don't
-	- the observed behavior of non-working features
-
-Any other comments or patches are also more than welcome.
-
-
-Installation
-------------
-
-If you are compiling this driver as included in the Linux kernel
-sources, look for the CONFIG_THINKPAD_ACPI Kconfig option.
-It is located on the menu path: "Device Drivers" -> "X86 Platform
-Specific Device Drivers" -> "ThinkPad ACPI Laptop Extras".
-
-
-Features
---------
-
-The driver exports two different interfaces to userspace, which can be
-used to access the features it provides.  One is a legacy procfs-based
-interface, which will be removed at some time in the future.  The other
-is a new sysfs-based interface which is not complete yet.
-
-The procfs interface creates the /proc/acpi/ibm directory.  There is a
-file under that directory for each feature it supports.  The procfs
-interface is mostly frozen, and will change very little if at all: it
-will not be extended to add any new functionality in the driver, instead
-all new functionality will be implemented on the sysfs interface.
-
-The sysfs interface tries to blend in the generic Linux sysfs subsystems
-and classes as much as possible.  Since some of these subsystems are not
-yet ready or stabilized, it is expected that this interface will change,
-and any and all userspace programs must deal with it.
-
-
-Notes about the sysfs interface
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
-Unlike what was done with the procfs interface, correctness when talking
-to the sysfs interfaces will be enforced, as will correctness in the
-thinkpad-acpi's implementation of sysfs interfaces.
-
-Also, any bugs in the thinkpad-acpi sysfs driver code or in the
-thinkpad-acpi's implementation of the sysfs interfaces will be fixed for
-maximum correctness, even if that means changing an interface in
-non-compatible ways.  As these interfaces mature both in the kernel and
-in thinkpad-acpi, such changes should become quite rare.
-
-Applications interfacing to the thinkpad-acpi sysfs interfaces must
-follow all sysfs guidelines and correctly process all errors (the sysfs
-interface makes extensive use of errors).  File descriptors and open /
-close operations to the sysfs inodes must also be properly implemented.
-
-The version of thinkpad-acpi's sysfs interface is exported by the driver
-as a driver attribute (see below).
-
-Sysfs driver attributes are on the driver's sysfs attribute space,
-for 2.6.23+ this is /sys/bus/platform/drivers/thinkpad_acpi/ and
-/sys/bus/platform/drivers/thinkpad_hwmon/
-
-Sysfs device attributes are on the thinkpad_acpi device sysfs attribute
-space, for 2.6.23+ this is /sys/devices/platform/thinkpad_acpi/.
-
-Sysfs device attributes for the sensors and fan are on the
-thinkpad_hwmon device's sysfs attribute space, but you should locate it
-looking for a hwmon device with the name attribute of "thinkpad", or
-better yet, through libsensors. For 4.14+ sysfs attributes were moved to the
-hwmon device (/sys/bus/platform/devices/thinkpad_hwmon/hwmon/hwmon? or
-/sys/class/hwmon/hwmon?).
-
-Driver version
---------------
-
-procfs: /proc/acpi/ibm/driver
-
-sysfs driver attribute: version
-
-The driver name and version. No commands can be written to this file.
-
-
-Sysfs interface version
------------------------
-
-sysfs driver attribute: interface_version
-
-Version of the thinkpad-acpi sysfs interface, as an unsigned long
-(output in hex format: 0xAAAABBCC), where:
-
-	AAAA
-	  - major revision
-	BB
-	  - minor revision
-	CC
-	  - bugfix revision
-
-The sysfs interface version changelog for the driver can be found at the
-end of this document.  Changes to the sysfs interface done by the kernel
-subsystems are not documented here, nor are they tracked by this
-attribute.
-
-Changes to the thinkpad-acpi sysfs interface are only considered
-non-experimental when they are submitted to Linux mainline, at which
-point the changes in this interface are documented and interface_version
-may be updated.  If you are using any thinkpad-acpi features not yet
-sent to mainline for merging, you do so on your own risk: these features
-may disappear, or be implemented in a different and incompatible way by
-the time they are merged in Linux mainline.
-
-Changes that are backwards-compatible by nature (e.g. the addition of
-attributes that do not change the way the other attributes work) do not
-always warrant an update of interface_version.  Therefore, one must
-expect that an attribute might not be there, and deal with it properly
-(an attribute not being there *is* a valid way to make it clear that a
-feature is not available in sysfs).
-
-
-Hot keys
---------
-
-procfs: /proc/acpi/ibm/hotkey
-
-sysfs device attribute: hotkey_*
-
-In a ThinkPad, the ACPI HKEY handler is responsible for communicating
-some important events and also keyboard hot key presses to the operating
-system.  Enabling the hotkey functionality of thinkpad-acpi signals the
-firmware that such a driver is present, and modifies how the ThinkPad
-firmware will behave in many situations.
-
-The driver enables the HKEY ("hot key") event reporting automatically
-when loaded, and disables it when it is removed.
-
-The driver will report HKEY events in the following format::
-
-	ibm/hotkey HKEY 00000080 0000xxxx
-
-Some of these events refer to hot key presses, but not all of them.
-
-The driver will generate events over the input layer for hot keys and
-radio switches, and over the ACPI netlink layer for other events.  The
-input layer support accepts the standard IOCTLs to remap the keycodes
-assigned to each hot key.
-
-The hot key bit mask allows some control over which hot keys generate
-events.  If a key is "masked" (bit set to 0 in the mask), the firmware
-will handle it.  If it is "unmasked", it signals the firmware that
-thinkpad-acpi would prefer to handle it, if the firmware would be so
-kind to allow it (and it often doesn't!).
-
-Not all bits in the mask can be modified.  Not all bits that can be
-modified do anything.  Not all hot keys can be individually controlled
-by the mask.  Some models do not support the mask at all.  The behaviour
-of the mask is, therefore, highly dependent on the ThinkPad model.
-
-The driver will filter out any unmasked hotkeys, so even if the firmware
-doesn't allow disabling an specific hotkey, the driver will not report
-events for unmasked hotkeys.
-
-Note that unmasking some keys prevents their default behavior.  For
-example, if Fn+F5 is unmasked, that key will no longer enable/disable
-Bluetooth by itself in firmware.
-
-Note also that not all Fn key combinations are supported through ACPI
-depending on the ThinkPad model and firmware version.  On those
-ThinkPads, it is still possible to support some extra hotkeys by
-polling the "CMOS NVRAM" at least 10 times per second.  The driver
-attempts to enables this functionality automatically when required.
-
-procfs notes
-^^^^^^^^^^^^
-
-The following commands can be written to the /proc/acpi/ibm/hotkey file::
-
-	echo 0xffffffff > /proc/acpi/ibm/hotkey -- enable all hot keys
-	echo 0 > /proc/acpi/ibm/hotkey -- disable all possible hot keys
-	... any other 8-hex-digit mask ...
-	echo reset > /proc/acpi/ibm/hotkey -- restore the recommended mask
-
-The following commands have been deprecated and will cause the kernel
-to log a warning::
-
-	echo enable > /proc/acpi/ibm/hotkey -- does nothing
-	echo disable > /proc/acpi/ibm/hotkey -- returns an error
-
-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:
-		DEPRECATED, WILL BE REMOVED SOON.
-
-		Returns 0.
-
-	hotkey_bios_mask:
-		DEPRECATED, DON'T USE, WILL BE REMOVED IN THE FUTURE.
-
-		Returns the hot keys mask when thinkpad-acpi was loaded.
-		Upon module unload, the hot keys mask will be restored
-		to this value.   This is always 0x80c, because those are
-		the hotkeys that were supported by ancient firmware
-		without mask support.
-
-	hotkey_enable:
-		DEPRECATED, WILL BE REMOVED SOON.
-
-		0: returns -EPERM
-		1: does nothing
-
-	hotkey_mask:
-		bit mask to enable reporting (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.
-
-	hotkey_all_mask:
-		bit mask that should enable event reporting for all
-		supported hot keys, when echoed to hotkey_mask above.
-		Unless you know which events need to be handled
-		passively (because the firmware *will* handle them
-		anyway), do *not* use hotkey_all_mask.  Use
-		hotkey_recommended_mask, instead. You have been warned.
-
-	hotkey_recommended_mask:
-		bit mask that should enable event reporting for all
-		supported hot keys, except those which are always
-		handled by the firmware anyway.  Echo it to
-		hotkey_mask above, to use.  This is the default mask
-		used by the driver.
-
-	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 hotkey_source_mask are
-		polled for in NVRAM, and reported as hotkey events if
-		enabled in hotkey_mask.  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,
-		which uses a single volume up or volume down hotkey
-		press to unmute, as per the ThinkPad volume mixer user
-		interface.  When in ACPI event mode, volume up/down/mute
-		events are reported by the firmware and can behave
-		differently (and that behaviour changes with firmware
-		version -- not just with firmware models -- as well as
-		OSI(Linux) state).
-
-	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 may 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" position, and 1 if the switch is in the
-		"radios enabled" position.
-
-		This attribute has poll()/select() support.
-
-	hotkey_tablet_mode:
-		If the ThinkPad has tablet capabilities, this attribute
-		will read 0 if the ThinkPad is in normal mode, and
-		1 if the ThinkPad is in tablet mode.
-
-		This attribute has poll()/select() support.
-
-	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 successfully 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
-followed by an EV_MSC MSC_SCAN event that shall contain that key's scan
-code.  An EV_SYN event will always be generated to mark the end of the
-event block.
-
-Do not use the EV_MSC MSC_SCAN events to process keys.  They are to be
-used as a helper to remap keys, only.  They are particularly useful when
-remapping KEY_UNKNOWN keys.
-
-The events are available in an input device, with the following id:
-
-	==============  ==============================
-	Bus		BUS_HOST
-	vendor		0x1014 (PCI_VENDOR_ID_IBM)  or
-			0x17aa (PCI_VENDOR_ID_LENOVO)
-	product		0x5054 ("TP")
-	version		0x4101
-	==============  ==============================
-
-The version will have its LSB incremented if the keymap changes in a
-backwards-compatible way.  The MSB shall always be 0x41 for this input
-device.  If the MSB is not 0x41, do not use the device as described in
-this section, as it is either something else (e.g. another input device
-exported by a thinkpad driver, such as HDAPS) or its functionality has
-been changed in a non-backwards compatible way.
-
-Adding other event types for other functionalities shall be considered a
-backwards-compatible change for this input device.
-
-Thinkpad-acpi Hot Key event map (version 0x4101):
-
-=======	=======	==============	==============================================
-ACPI	Scan
-event	code	Key		Notes
-=======	=======	==============	==============================================
-0x1001	0x00	FN+F1		-
-
-0x1002	0x01	FN+F2		IBM: battery (rare)
-				Lenovo: Screen lock
-
-0x1003	0x02	FN+F3		Many IBM models always report
-				this hot key, even with hot keys
-				disabled or with Fn+F3 masked
-				off
-				IBM: screen lock, often turns
-				off the ThinkLight as side-effect
-				Lenovo: battery
-
-0x1004	0x03	FN+F4		Sleep button (ACPI sleep button
-				semantics, i.e. sleep-to-RAM).
-				It always generates some kind
-				of event, either the hot key
-				event or an ACPI sleep button
-				event. The firmware may
-				refuse to generate further FN+F4
-				key presses until a S3 or S4 ACPI
-				sleep cycle is performed or some
-				time passes.
-
-0x1005	0x04	FN+F5		Radio.  Enables/disables
-				the internal Bluetooth hardware
-				and W-WAN card if left in control
-				of the firmware.  Does not affect
-				the WLAN card.
-				Should be used to turn on/off all
-				radios (Bluetooth+W-WAN+WLAN),
-				really.
-
-0x1006	0x05	FN+F6		-
-
-0x1007	0x06	FN+F7		Video output cycle.
-				Do you feel lucky today?
-
-0x1008	0x07	FN+F8		IBM: toggle screen expand
-				Lenovo: configure UltraNav,
-				or toggle screen expand
-
-0x1009	0x08	FN+F9		-
-
-...	...	...		...
-
-0x100B	0x0A	FN+F11		-
-
-0x100C	0x0B	FN+F12		Sleep to disk.  You are always
-				supposed to handle it yourself,
-				either through the ACPI event,
-				or through a hotkey event.
-				The firmware may refuse to
-				generate further FN+F12 key
-				press events until a S3 or S4
-				ACPI sleep cycle is performed,
-				or some time passes.
-
-0x100D	0x0C	FN+BACKSPACE	-
-0x100E	0x0D	FN+INSERT	-
-0x100F	0x0E	FN+DELETE	-
-
-0x1010	0x0F	FN+HOME		Brightness up.  This key is
-				always handled by the firmware
-				in IBM ThinkPads, even when
-				unmasked.  Just leave it alone.
-				For Lenovo ThinkPads with a new
-				BIOS, it has to be handled either
-				by the ACPI OSI, or by userspace.
-				The driver does the right thing,
-				never mess with this.
-0x1011	0x10	FN+END		Brightness down.  See brightness
-				up for details.
-
-0x1012	0x11	FN+PGUP		ThinkLight toggle.  This key is
-				always handled by the firmware,
-				even when unmasked.
-
-0x1013	0x12	FN+PGDOWN	-
-
-0x1014	0x13	FN+SPACE	Zoom key
-
-0x1015	0x14	VOLUME UP	Internal mixer volume up. This
-				key is always handled by the
-				firmware, even when unmasked.
-				NOTE: Lenovo seems to be changing
-				this.
-0x1016	0x15	VOLUME DOWN	Internal mixer volume up. This
-				key is always handled by the
-				firmware, even when unmasked.
-				NOTE: Lenovo seems to be changing
-				this.
-0x1017	0x16	MUTE		Mute internal mixer. This
-				key is always handled by the
-				firmware, even when unmasked.
-
-0x1018	0x17	THINKPAD	ThinkPad/Access IBM/Lenovo key
-
-0x1019	0x18	unknown
-
-...	...	...
-
-0x1020	0x1F	unknown
-=======	=======	==============	==============================================
-
-The ThinkPad firmware does not allow one to differentiate when most hot
-keys are pressed or released (either that, or we don't know how to, yet).
-For these keys, the driver generates a set of events for a key press and
-immediately issues the same set of events for a key release.  It is
-unknown by the driver if the ThinkPad firmware triggered these events on
-hot key press or release, but the firmware will do it for either one, not
-both.
-
-If a key is mapped to KEY_RESERVED, it generates no input events at all.
-If a key is mapped to KEY_UNKNOWN, it generates an input event that
-includes an scan code.  If a key is mapped to anything else, it will
-generate input device EV_KEY events.
-
-In addition to the EV_KEY events, thinkpad-acpi may also issue EV_SW
-events for switches:
-
-==============	==============================================
-SW_RFKILL_ALL	T60 and later hardware rfkill rocker switch
-SW_TABLET_MODE	Tablet ThinkPads HKEY events 0x5009 and 0x500A
-==============	==============================================
-
-Non hotkey ACPI HKEY event map
-------------------------------
-
-Events that are never propagated by the driver:
-
-======		==================================================
-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
-0x5001		Lid closed
-0x5002		Lid opened
-0x5009		Tablet swivel: switched to tablet mode
-0x500A		Tablet swivel: switched to normal mode
-0x5010		Brightness level changed/control event
-0x6000		KEYBOARD: Numlock key pressed
-0x6005		KEYBOARD: Fn key pressed (TO BE VERIFIED)
-0x7000		Radio Switch may have changed state
-======		==================================================
-
-
-Events that are propagated by the driver to userspace:
-
-======		=====================================================
-0x2313		ALARM: System is waking up from suspend because
-		the battery is nearly empty
-0x2413		ALARM: System is waking up from hibernation because
-		the battery is nearly empty
-0x3003		Bay ejection (see 0x2x05) complete, can sleep again
-0x3006		Bay hotplug request (hint to power up SATA link when
-		the optical drive tray is ejected)
-0x4003		Undocked (see 0x2x04), can sleep again
-0x4010		Docked into hotplug port replicator (non-ACPI dock)
-0x4011		Undocked from hotplug port replicator (non-ACPI dock)
-0x500B		Tablet pen inserted into its storage bay
-0x500C		Tablet pen removed from its storage bay
-0x6011		ALARM: battery is too hot
-0x6012		ALARM: battery is extremely hot
-0x6021		ALARM: a sensor is too hot
-0x6022		ALARM: a sensor is extremely hot
-0x6030		System thermal table changed
-0x6032		Thermal Control command set completion  (DYTC, Windows)
-0x6040		Nvidia Optimus/AC adapter related (TO BE VERIFIED)
-0x60C0		X1 Yoga 2016, Tablet mode status changed
-0x60F0		Thermal Transformation changed (GMTS, Windows)
-======		=====================================================
-
-Battery nearly empty alarms are a last resort attempt to get the
-operating system to hibernate or shutdown cleanly (0x2313), or shutdown
-cleanly (0x2413) before power is lost.  They must be acted upon, as the
-wake up caused by the firmware will have negated most safety nets...
-
-When any of the "too hot" alarms happen, according to Lenovo the user
-should suspend or hibernate the laptop (and in the case of battery
-alarms, unplug the AC adapter) to let it cool down.  These alarms do
-signal that something is wrong, they should never happen on normal
-operating conditions.
-
-The "extremely hot" alarms are emergencies.  According to Lenovo, the
-operating system is to force either an immediate suspend or hibernate
-cycle, or a system shutdown.  Obviously, something is very wrong if this
-happens.
-
-
-Brightness hotkey notes
-^^^^^^^^^^^^^^^^^^^^^^^
-
-Don't mess with the brightness hotkeys in a Thinkpad.  If you want
-notifications for OSD, use the sysfs backlight class event support.
-
-The driver will issue KEY_BRIGHTNESS_UP and KEY_BRIGHTNESS_DOWN events
-automatically for the cases were userspace has to do something to
-implement brightness changes.  When you override these events, you will
-either fail to handle properly the ThinkPads that require explicit
-action to change backlight brightness, or the ThinkPads that require
-that no action be taken to work properly.
-
-
-Bluetooth
----------
-
-procfs: /proc/acpi/ibm/bluetooth
-
-sysfs device attribute: bluetooth_enable (deprecated)
-
-sysfs rfkill class: switch "tpacpi_bluetooth_sw"
-
-This feature shows the presence and current state of a ThinkPad
-Bluetooth device in the internal ThinkPad CDC slot.
-
-If the ThinkPad supports it, the Bluetooth state is stored in NVRAM,
-so it is kept across reboots and power-off.
-
-Procfs notes
-^^^^^^^^^^^^
-
-If Bluetooth is installed, the following commands can be used::
-
-	echo enable > /proc/acpi/ibm/bluetooth
-	echo disable > /proc/acpi/ibm/bluetooth
-
-Sysfs notes
-^^^^^^^^^^^
-
-	If the Bluetooth CDC card is installed, it can be enabled /
-	disabled through the "bluetooth_enable" thinkpad-acpi device
-	attribute, and its current status can also be queried.
-
-	enable:
-
-		- 0: disables Bluetooth / Bluetooth is disabled
-		- 1: enables Bluetooth / Bluetooth is enabled.
-
-	Note: this interface has been superseded by the	generic rfkill
-	class.  It has been deprecated, and it will be removed in year
-	2010.
-
-	rfkill controller switch "tpacpi_bluetooth_sw": refer to
-	Documentation/rfkill.txt for details.
-
-
-Video output control -- /proc/acpi/ibm/video
---------------------------------------------
-
-This feature allows control over the devices used for video output -
-LCD, CRT or DVI (if available). The following commands are available::
-
-	echo lcd_enable > /proc/acpi/ibm/video
-	echo lcd_disable > /proc/acpi/ibm/video
-	echo crt_enable > /proc/acpi/ibm/video
-	echo crt_disable > /proc/acpi/ibm/video
-	echo dvi_enable > /proc/acpi/ibm/video
-	echo dvi_disable > /proc/acpi/ibm/video
-	echo auto_enable > /proc/acpi/ibm/video
-	echo auto_disable > /proc/acpi/ibm/video
-	echo expand_toggle > /proc/acpi/ibm/video
-	echo video_switch > /proc/acpi/ibm/video
-
-NOTE:
-  Access to this feature is restricted to processes owning the
-  CAP_SYS_ADMIN capability for safety reasons, as it can interact badly
-  enough with some versions of X.org to crash it.
-
-Each video output device can be enabled or disabled individually.
-Reading /proc/acpi/ibm/video shows the status of each device.
-
-Automatic video switching can be enabled or disabled.  When automatic
-video switching is enabled, certain events (e.g. opening the lid,
-docking or undocking) cause the video output device to change
-automatically. While this can be useful, it also causes flickering
-and, on the X40, video corruption. By disabling automatic switching,
-the flickering or video corruption can be avoided.
-
-The video_switch command cycles through the available video outputs
-(it simulates the behavior of Fn-F7).
-
-Video expansion can be toggled through this feature. This controls
-whether the display is expanded to fill the entire LCD screen when a
-mode with less than full resolution is used. Note that the current
-video expansion status cannot be determined through this feature.
-
-Note that on many models (particularly those using Radeon graphics
-chips) the X driver configures the video card in a way which prevents
-Fn-F7 from working. This also disables the video output switching
-features of this driver, as it uses the same ACPI methods as
-Fn-F7. Video switching on the console should still work.
-
-UPDATE: refer to https://bugs.freedesktop.org/show_bug.cgi?id=2000
-
-
-ThinkLight control
-------------------
-
-procfs: /proc/acpi/ibm/light
-
-sysfs attributes: as per LED class, for the "tpacpi::thinklight" LED
-
-procfs notes
-^^^^^^^^^^^^
-
-The ThinkLight status can be read and set through the procfs interface.  A
-few models which do not make the status available will show the ThinkLight
-status as "unknown". The available commands are::
-
-	echo on  > /proc/acpi/ibm/light
-	echo off > /proc/acpi/ibm/light
-
-sysfs notes
-^^^^^^^^^^^
-
-The ThinkLight sysfs interface is documented by the LED class
-documentation, in Documentation/leds/leds-class.rst.  The ThinkLight LED name
-is "tpacpi::thinklight".
-
-Due to limitations in the sysfs LED class, if the status of the ThinkLight
-cannot be read or if it is unknown, thinkpad-acpi will report it as "off".
-It is impossible to know if the status returned through sysfs is valid.
-
-
-CMOS/UCMS control
------------------
-
-procfs: /proc/acpi/ibm/cmos
-
-sysfs device attribute: cmos_command
-
-This feature is mostly used internally by the ACPI firmware to keep the legacy
-CMOS NVRAM bits in sync with the current machine state, and to record this
-state so that the ThinkPad will retain such settings across reboots.
-
-Some of these commands actually perform actions in some ThinkPad models, but
-this is expected to disappear more and more in newer models.  As an example, in
-a T43 and in a X40, commands 12 and 13 still control the ThinkLight state for
-real, but commands 0 to 2 don't control the mixer anymore (they have been
-phased out) and just update the NVRAM.
-
-The range of valid cmos command numbers is 0 to 21, but not all have an
-effect and the behavior varies from model to model.  Here is the behavior
-on the X40 (tpb is the ThinkPad Buttons utility):
-
-	- 0 - Related to "Volume down" key press
-	- 1 - Related to "Volume up" key press
-	- 2 - Related to "Mute on" key press
-	- 3 - Related to "Access IBM" key press
-	- 4 - Related to "LCD brightness up" key press
-	- 5 - Related to "LCD brightness down" key press
-	- 11 - Related to "toggle screen expansion" key press/function
-	- 12 - Related to "ThinkLight on"
-	- 13 - Related to "ThinkLight off"
-	- 14 - Related to "ThinkLight" key press (toggle ThinkLight)
-
-The cmos command interface is prone to firmware split-brain problems, as
-in newer ThinkPads it is just a compatibility layer.  Do not use it, it is
-exported just as a debug tool.
-
-
-LED control
------------
-
-procfs: /proc/acpi/ibm/led
-sysfs attributes: as per LED class, see below for names
-
-Some of the LED indicators can be controlled through this feature.  On
-some older ThinkPad models, it is possible to query the status of the
-LED indicators as well.  Newer ThinkPads cannot query the real status
-of the LED indicators.
-
-Because misuse of the LEDs could induce an unaware user to perform
-dangerous actions (like undocking or ejecting a bay device while the
-buses are still active), or mask an important alarm (such as a nearly
-empty battery, or a broken battery), access to most LEDs is
-restricted.
-
-Unrestricted access to all LEDs requires that thinkpad-acpi be
-compiled with the CONFIG_THINKPAD_ACPI_UNSAFE_LEDS option enabled.
-Distributions must never enable this option.  Individual users that
-are aware of the consequences are welcome to enabling it.
-
-Audio mute and microphone mute LEDs are supported, but currently not
-visible to userspace. They are used by the snd-hda-intel audio driver.
-
-procfs notes
-^^^^^^^^^^^^
-
-The available commands are::
-
-	echo '<LED number> on' >/proc/acpi/ibm/led
-	echo '<LED number> off' >/proc/acpi/ibm/led
-	echo '<LED number> blink' >/proc/acpi/ibm/led
-
-The <LED number> range is 0 to 15. The set of LEDs that can be
-controlled varies from model to model. Here is the common ThinkPad
-mapping:
-
-	- 0 - power
-	- 1 - battery (orange)
-	- 2 - battery (green)
-	- 3 - UltraBase/dock
-	- 4 - UltraBay
-	- 5 - UltraBase battery slot
-	- 6 - (unknown)
-	- 7 - standby
-	- 8 - dock status 1
-	- 9 - dock status 2
-	- 10, 11 - (unknown)
-	- 12 - thinkvantage
-	- 13, 14, 15 - (unknown)
-
-All of the above can be turned on and off and can be made to blink.
-
-sysfs notes
-^^^^^^^^^^^
-
-The ThinkPad LED sysfs interface is described in detail by the LED class
-documentation, in Documentation/leds/leds-class.rst.
-
-The LEDs are named (in LED ID order, from 0 to 12):
-"tpacpi::power", "tpacpi:orange:batt", "tpacpi:green:batt",
-"tpacpi::dock_active", "tpacpi::bay_active", "tpacpi::dock_batt",
-"tpacpi::unknown_led", "tpacpi::standby", "tpacpi::dock_status1",
-"tpacpi::dock_status2", "tpacpi::unknown_led2", "tpacpi::unknown_led3",
-"tpacpi::thinkvantage".
-
-Due to limitations in the sysfs LED class, if the status of the LED
-indicators cannot be read due to an error, thinkpad-acpi will report it as
-a brightness of zero (same as LED off).
-
-If the thinkpad firmware doesn't support reading the current status,
-trying to read the current LED brightness will just return whatever
-brightness was last written to that attribute.
-
-These LEDs can blink using hardware acceleration.  To request that a
-ThinkPad indicator LED should blink in hardware accelerated mode, use the
-"timer" trigger, and leave the delay_on and delay_off parameters set to
-zero (to request hardware acceleration autodetection).
-
-LEDs that are known not to exist in a given ThinkPad model are not
-made available through the sysfs interface.  If you have a dock and you
-notice there are LEDs listed for your ThinkPad that do not exist (and
-are not in the dock), or if you notice that there are missing LEDs,
-a report to ibm-acpi-devel@lists.sourceforge.net is appreciated.
-
-
-ACPI sounds -- /proc/acpi/ibm/beep
-----------------------------------
-
-The BEEP method is used internally by the ACPI firmware to provide
-audible alerts in various situations. This feature allows the same
-sounds to be triggered manually.
-
-The commands are non-negative integer numbers::
-
-	echo <number> >/proc/acpi/ibm/beep
-
-The valid <number> range is 0 to 17. Not all numbers trigger sounds
-and the sounds vary from model to model. Here is the behavior on the
-X40:
-
-	- 0 - stop a sound in progress (but use 17 to stop 16)
-	- 2 - two beeps, pause, third beep ("low battery")
-	- 3 - single beep
-	- 4 - high, followed by low-pitched beep ("unable")
-	- 5 - single beep
-	- 6 - very high, followed by high-pitched beep ("AC/DC")
-	- 7 - high-pitched beep
-	- 9 - three short beeps
-	- 10 - very long beep
-	- 12 - low-pitched beep
-	- 15 - three high-pitched beeps repeating constantly, stop with 0
-	- 16 - one medium-pitched beep repeating constantly, stop with 17
-	- 17 - stop 16
-
-
-Temperature sensors
--------------------
-
-procfs: /proc/acpi/ibm/thermal
-
-sysfs device attributes: (hwmon "thinkpad") temp*_input
-
-Most ThinkPads include six or more separate temperature sensors but only
-expose the CPU temperature through the standard ACPI methods.  This
-feature shows readings from up to eight different sensors on older
-ThinkPads, and up to sixteen different sensors on newer ThinkPads.
-
-For example, on the X40, a typical output may be:
-
-temperatures:
-	42 42 45 41 36 -128 33 -128
-
-On the T43/p, a typical output may be:
-
-temperatures:
-	48 48 36 52 38 -128 31 -128 48 52 48 -128 -128 -128 -128 -128
-
-The mapping of thermal sensors to physical locations varies depending on
-system-board model (and thus, on ThinkPad model).
-
-http://thinkwiki.org/wiki/Thermal_Sensors is a public wiki page that
-tries to track down these locations for various models.
-
-Most (newer?) models seem to follow this pattern:
-
-- 1:  CPU
-- 2:  (depends on model)
-- 3:  (depends on model)
-- 4:  GPU
-- 5:  Main battery: main sensor
-- 6:  Bay battery: main sensor
-- 7:  Main battery: secondary sensor
-- 8:  Bay battery: secondary sensor
-- 9-15: (depends on model)
-
-For the R51 (source: Thomas Gruber):
-
-- 2:  Mini-PCI
-- 3:  Internal HDD
-
-For the T43, T43/p (source: Shmidoax/Thinkwiki.org)
-http://thinkwiki.org/wiki/Thermal_Sensors#ThinkPad_T43.2C_T43p
-
-- 2:  System board, left side (near PCMCIA slot), reported as HDAPS temp
-- 3:  PCMCIA slot
-- 9:  MCH (northbridge) to DRAM Bus
-- 10: Clock-generator, mini-pci card and ICH (southbridge), under Mini-PCI
-      card, under touchpad
-- 11: Power regulator, underside of system board, below F2 key
-
-The A31 has a very atypical layout for the thermal sensors
-(source: Milos Popovic, http://thinkwiki.org/wiki/Thermal_Sensors#ThinkPad_A31)
-
-- 1:  CPU
-- 2:  Main Battery: main sensor
-- 3:  Power Converter
-- 4:  Bay Battery: main sensor
-- 5:  MCH (northbridge)
-- 6:  PCMCIA/ambient
-- 7:  Main Battery: secondary sensor
-- 8:  Bay Battery: secondary sensor
-
-
-Procfs notes
-^^^^^^^^^^^^
-
-	Readings from sensors that are not available return -128.
-	No commands can be written to this file.
-
-Sysfs notes
-^^^^^^^^^^^
-
-	Sensors that are not available return the ENXIO error.  This
-	status may change at runtime, as there are hotplug thermal
-	sensors, like those inside the batteries and docks.
-
-	thinkpad-acpi thermal sensors are reported through the hwmon
-	subsystem, and follow all of the hwmon guidelines at
-	Documentation/hwmon.
-
-EXPERIMENTAL: Embedded controller register dump
------------------------------------------------
-
-This feature is not included in the thinkpad driver anymore.
-Instead the EC can be accessed through /sys/kernel/debug/ec with
-a userspace tool which can be found here:
-ftp://ftp.suse.com/pub/people/trenn/sources/ec
-
-Use it to determine the register holding the fan
-speed on some models. To do that, do the following:
-
-	- make sure the battery is fully charged
-	- make sure the fan is running
-	- use above mentioned tool to read out the EC
-
-Often fan and temperature values vary between
-readings. Since temperatures don't change vary fast, you can take
-several quick dumps to eliminate them.
-
-You can use a similar method to figure out the meaning of other
-embedded controller registers - e.g. make sure nothing else changes
-except the charging or discharging battery to determine which
-registers contain the current battery capacity, etc. If you experiment
-with this, do send me your results (including some complete dumps with
-a description of the conditions when they were taken.)
-
-
-LCD brightness control
-----------------------
-
-procfs: /proc/acpi/ibm/brightness
-
-sysfs backlight device "thinkpad_screen"
-
-This feature allows software control of the LCD brightness on ThinkPad
-models which don't have a hardware brightness slider.
-
-It has some limitations: the LCD backlight cannot be actually turned
-on or off by this interface, it just controls the backlight brightness
-level.
-
-On IBM (and some of the earlier Lenovo) ThinkPads, the backlight control
-has eight brightness levels, ranging from 0 to 7.  Some of the levels
-may not be distinct.  Later Lenovo models that implement the ACPI
-display backlight brightness control methods have 16 levels, ranging
-from 0 to 15.
-
-For IBM ThinkPads, there are two interfaces to the firmware for direct
-brightness control, EC and UCMS (or CMOS).  To select which one should be
-used, use the brightness_mode module parameter: brightness_mode=1 selects
-EC mode, brightness_mode=2 selects UCMS mode, brightness_mode=3 selects EC
-mode with NVRAM backing (so that brightness changes are remembered across
-shutdown/reboot).
-
-The driver tries to select which interface to use from a table of
-defaults for each ThinkPad model.  If it makes a wrong choice, please
-report this as a bug, so that we can fix it.
-
-Lenovo ThinkPads only support brightness_mode=2 (UCMS).
-
-When display backlight brightness controls are available through the
-standard ACPI interface, it is best to use it instead of this direct
-ThinkPad-specific interface.  The driver will disable its native
-backlight brightness control interface if it detects that the standard
-ACPI interface is available in the ThinkPad.
-
-If you want to use the thinkpad-acpi backlight brightness control
-instead of the generic ACPI video backlight brightness control for some
-reason, you should use the acpi_backlight=vendor kernel parameter.
-
-The brightness_enable module parameter can be used to control whether
-the LCD brightness control feature will be enabled when available.
-brightness_enable=0 forces it to be disabled.  brightness_enable=1
-forces it to be enabled when available, even if the standard ACPI
-interface is also available.
-
-Procfs notes
-^^^^^^^^^^^^
-
-The available commands are::
-
-	echo up   >/proc/acpi/ibm/brightness
-	echo down >/proc/acpi/ibm/brightness
-	echo 'level <level>' >/proc/acpi/ibm/brightness
-
-Sysfs notes
-^^^^^^^^^^^
-
-The interface is implemented through the backlight sysfs class, which is
-poorly documented at this time.
-
-Locate the thinkpad_screen device under /sys/class/backlight, and inside
-it there will be the following attributes:
-
-	max_brightness:
-		Reads the maximum brightness the hardware can be set to.
-		The minimum is always zero.
-
-	actual_brightness:
-		Reads what brightness the screen is set to at this instant.
-
-	brightness:
-		Writes request the driver to change brightness to the
-		given value.  Reads will tell you what brightness the
-		driver is trying to set the display to when "power" is set
-		to zero and the display has not been dimmed by a kernel
-		power management event.
-
-	power:
-		power management mode, where 0 is "display on", and 1 to 3
-		will dim the display backlight to brightness level 0
-		because thinkpad-acpi cannot really turn the backlight
-		off.  Kernel power management events can temporarily
-		increase the current power management level, i.e. they can
-		dim the display.
-
-
-WARNING:
-
-    Whatever you do, do NOT ever call thinkpad-acpi backlight-level change
-    interface and the ACPI-based backlight level change interface
-    (available on newer BIOSes, and driven by the Linux ACPI video driver)
-    at the same time.  The two will interact in bad ways, do funny things,
-    and maybe reduce the life of the backlight lamps by needlessly kicking
-    its level up and down at every change.
-
-
-Volume control (Console Audio control)
---------------------------------------
-
-procfs: /proc/acpi/ibm/volume
-
-ALSA: "ThinkPad Console Audio Control", default ID: "ThinkPadEC"
-
-NOTE: by default, the volume control interface operates in read-only
-mode, as it is supposed to be used for on-screen-display purposes.
-The read/write mode can be enabled through the use of the
-"volume_control=1" module parameter.
-
-NOTE: distros are urged to not enable volume_control by default, this
-should be done by the local admin only.  The ThinkPad UI is for the
-console audio control to be done through the volume keys only, and for
-the desktop environment to just provide on-screen-display feedback.
-Software volume control should be done only in the main AC97/HDA
-mixer.
-
-
-About the ThinkPad Console Audio control
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
-ThinkPads have a built-in amplifier and muting circuit that drives the
-console headphone and speakers.  This circuit is after the main AC97
-or HDA mixer in the audio path, and under exclusive control of the
-firmware.
-
-ThinkPads have three special hotkeys to interact with the console
-audio control: volume up, volume down and mute.
-
-It is worth noting that the normal way the mute function works (on
-ThinkPads that do not have a "mute LED") is:
-
-1. Press mute to mute.  It will *always* mute, you can press it as
-   many times as you want, and the sound will remain mute.
-
-2. Press either volume key to unmute the ThinkPad (it will _not_
-   change the volume, it will just unmute).
-
-This is a very superior design when compared to the cheap software-only
-mute-toggle solution found on normal consumer laptops:  you can be
-absolutely sure the ThinkPad will not make noise if you press the mute
-button, no matter the previous state.
-
-The IBM ThinkPads, and the earlier Lenovo ThinkPads have variable-gain
-amplifiers driving the speakers and headphone output, and the firmware
-also handles volume control for the headphone and speakers on these
-ThinkPads without any help from the operating system (this volume
-control stage exists after the main AC97 or HDA mixer in the audio
-path).
-
-The newer Lenovo models only have firmware mute control, and depend on
-the main HDA mixer to do volume control (which is done by the operating
-system).  In this case, the volume keys are filtered out for unmute
-key press (there are some firmware bugs in this area) and delivered as
-normal key presses to the operating system (thinkpad-acpi is not
-involved).
-
-
-The ThinkPad-ACPI volume control
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
-The preferred way to interact with the Console Audio control is the
-ALSA interface.
-
-The legacy procfs interface allows one to read the current state,
-and if volume control is enabled, accepts the following commands::
-
-	echo up   >/proc/acpi/ibm/volume
-	echo down >/proc/acpi/ibm/volume
-	echo mute >/proc/acpi/ibm/volume
-	echo unmute >/proc/acpi/ibm/volume
-	echo 'level <level>' >/proc/acpi/ibm/volume
-
-The <level> number range is 0 to 14 although not all of them may be
-distinct. To unmute the volume after the mute command, use either the
-up or down command (the level command will not unmute the volume), or
-the unmute command.
-
-You can use the volume_capabilities parameter to tell the driver
-whether your thinkpad has volume control or mute-only control:
-volume_capabilities=1 for mixers with mute and volume control,
-volume_capabilities=2 for mixers with only mute control.
-
-If the driver misdetects the capabilities for your ThinkPad model,
-please report this to ibm-acpi-devel@lists.sourceforge.net, so that we
-can update the driver.
-
-There are two strategies for volume control.  To select which one
-should be used, use the volume_mode module parameter: volume_mode=1
-selects EC mode, and volume_mode=3 selects EC mode with NVRAM backing
-(so that volume/mute changes are remembered across shutdown/reboot).
-
-The driver will operate in volume_mode=3 by default. If that does not
-work well on your ThinkPad model, please report this to
-ibm-acpi-devel@lists.sourceforge.net.
-
-The driver supports the standard ALSA module parameters.  If the ALSA
-mixer is disabled, the driver will disable all volume functionality.
-
-
-Fan control and monitoring: fan speed, fan enable/disable
----------------------------------------------------------
-
-procfs: /proc/acpi/ibm/fan
-
-sysfs device attributes: (hwmon "thinkpad") fan1_input, pwm1, pwm1_enable, fan2_input
-
-sysfs hwmon driver attributes: fan_watchdog
-
-NOTE NOTE NOTE:
-   fan control operations are disabled by default for
-   safety reasons.  To enable them, the module parameter "fan_control=1"
-   must be given to thinkpad-acpi.
-
-This feature attempts to show the current fan speed, control mode and
-other fan data that might be available.  The speed is read directly
-from the hardware registers of the embedded controller.  This is known
-to work on later R, T, X and Z series ThinkPads but may show a bogus
-value on other models.
-
-Some Lenovo ThinkPads support a secondary fan.  This fan cannot be
-controlled separately, it shares the main fan control.
-
-Fan levels
-^^^^^^^^^^
-
-Most ThinkPad fans work in "levels" at the firmware interface.  Level 0
-stops the fan.  The higher the level, the higher the fan speed, although
-adjacent levels often map to the same fan speed.  7 is the highest
-level, where the fan reaches the maximum recommended speed.
-
-Level "auto" means the EC changes the fan level according to some
-internal algorithm, usually based on readings from the thermal sensors.
-
-There is also a "full-speed" level, also known as "disengaged" level.
-In this level, the EC disables the speed-locked closed-loop fan control,
-and drives the fan as fast as it can go, which might exceed hardware
-limits, so use this level with caution.
-
-The fan usually ramps up or down slowly from one speed to another, and
-it is normal for the EC to take several seconds to react to fan
-commands.  The full-speed level may take up to two minutes to ramp up to
-maximum speed, and in some ThinkPads, the tachometer readings go stale
-while the EC is transitioning to the full-speed level.
-
-WARNING WARNING WARNING: do not leave the fan disabled unless you are
-monitoring all of the temperature sensor readings and you are ready to
-enable it if necessary to avoid overheating.
-
-An enabled fan in level "auto" may stop spinning if the EC decides the
-ThinkPad is cool enough and doesn't need the extra airflow.  This is
-normal, and the EC will spin the fan up if the various thermal readings
-rise too much.
-
-On the X40, this seems to depend on the CPU and HDD temperatures.
-Specifically, the fan is turned on when either the CPU temperature
-climbs to 56 degrees or the HDD temperature climbs to 46 degrees.  The
-fan is turned off when the CPU temperature drops to 49 degrees and the
-HDD temperature drops to 41 degrees.  These thresholds cannot
-currently be controlled.
-
-The ThinkPad's ACPI DSDT code will reprogram the fan on its own when
-certain conditions are met.  It will override any fan programming done
-through thinkpad-acpi.
-
-The thinkpad-acpi kernel driver can be programmed to revert the fan
-level to a safe setting if userspace does not issue one of the procfs
-fan commands: "enable", "disable", "level" or "watchdog", or if there
-are no writes to pwm1_enable (or to pwm1 *if and only if* pwm1_enable is
-set to 1, manual mode) within a configurable amount of time of up to
-120 seconds.  This functionality is called fan safety watchdog.
-
-Note that the watchdog timer stops after it enables the fan.  It will be
-rearmed again automatically (using the same interval) when one of the
-above mentioned fan commands is received.  The fan watchdog is,
-therefore, not suitable to protect against fan mode changes made through
-means other than the "enable", "disable", and "level" procfs fan
-commands, or the hwmon fan control sysfs interface.
-
-Procfs notes
-^^^^^^^^^^^^
-
-The fan may be enabled or disabled with the following commands::
-
-	echo enable  >/proc/acpi/ibm/fan
-	echo disable >/proc/acpi/ibm/fan
-
-Placing a fan on level 0 is the same as disabling it.  Enabling a fan
-will try to place it in a safe level if it is too slow or disabled.
-
-The fan level can be controlled with the command::
-
-	echo 'level <level>' > /proc/acpi/ibm/fan
-
-Where <level> is an integer from 0 to 7, or one of the words "auto" or
-"full-speed" (without the quotes).  Not all ThinkPads support the "auto"
-and "full-speed" levels.  The driver accepts "disengaged" as an alias for
-"full-speed", and reports it as "disengaged" for backwards
-compatibility.
-
-On the X31 and X40 (and ONLY on those models), the fan speed can be
-controlled to a certain degree.  Once the fan is running, it can be
-forced to run faster or slower with the following command::
-
-	echo 'speed <speed>' > /proc/acpi/ibm/fan
-
-The sustainable range of fan speeds on the X40 appears to be from about
-3700 to about 7350. Values outside this range either do not have any
-effect or the fan speed eventually settles somewhere in that range.  The
-fan cannot be stopped or started with this command.  This functionality
-is incomplete, and not available through the sysfs interface.
-
-To program the safety watchdog, use the "watchdog" command::
-
-	echo 'watchdog <interval in seconds>' > /proc/acpi/ibm/fan
-
-If you want to disable the watchdog, use 0 as the interval.
-
-Sysfs notes
-^^^^^^^^^^^
-
-The sysfs interface follows the hwmon subsystem guidelines for the most
-part, and the exception is the fan safety watchdog.
-
-Writes to any of the sysfs attributes may return the EINVAL error if
-that operation is not supported in a given ThinkPad or if the parameter
-is out-of-bounds, and EPERM if it is forbidden.  They may also return
-EINTR (interrupted system call), and EIO (I/O error while trying to talk
-to the firmware).
-
-Features not yet implemented by the driver return ENOSYS.
-
-hwmon device attribute pwm1_enable:
-	- 0: PWM offline (fan is set to full-speed mode)
-	- 1: Manual PWM control (use pwm1 to set fan level)
-	- 2: Hardware PWM control (EC "auto" mode)
-	- 3: reserved (Software PWM control, not implemented yet)
-
-	Modes 0 and 2 are not supported by all ThinkPads, and the
-	driver is not always able to detect this.  If it does know a
-	mode is unsupported, it will return -EINVAL.
-
-hwmon device attribute pwm1:
-	Fan level, scaled from the firmware values of 0-7 to the hwmon
-	scale of 0-255.  0 means fan stopped, 255 means highest normal
-	speed (level 7).
-
-	This attribute only commands the fan if pmw1_enable is set to 1
-	(manual PWM control).
-
-hwmon device attribute fan1_input:
-	Fan tachometer reading, in RPM.  May go stale on certain
-	ThinkPads while the EC transitions the PWM to offline mode,
-	which can take up to two minutes.  May return rubbish on older
-	ThinkPads.
-
-hwmon device attribute fan2_input:
-	Fan tachometer reading, in RPM, for the secondary fan.
-	Available only on some ThinkPads.  If the secondary fan is
-	not installed, will always read 0.
-
-hwmon driver attribute fan_watchdog:
-	Fan safety watchdog timer interval, in seconds.  Minimum is
-	1 second, maximum is 120 seconds.  0 disables the watchdog.
-
-To stop the fan: set pwm1 to zero, and pwm1_enable to 1.
-
-To start the fan in a safe mode: set pwm1_enable to 2.  If that fails
-with EINVAL, try to set pwm1_enable to 1 and pwm1 to at least 128 (255
-would be the safest choice, though).
-
-
-WAN
----
-
-procfs: /proc/acpi/ibm/wan
-
-sysfs device attribute: wwan_enable (deprecated)
-
-sysfs rfkill class: switch "tpacpi_wwan_sw"
-
-This feature shows the presence and current state of the built-in
-Wireless WAN device.
-
-If the ThinkPad supports it, the WWAN state is stored in NVRAM,
-so it is kept across reboots and power-off.
-
-It was tested on a Lenovo ThinkPad X60. It should probably work on other
-ThinkPad models which come with this module installed.
-
-Procfs notes
-^^^^^^^^^^^^
-
-If the W-WAN card is installed, the following commands can be used::
-
-	echo enable > /proc/acpi/ibm/wan
-	echo disable > /proc/acpi/ibm/wan
-
-Sysfs notes
-^^^^^^^^^^^
-
-	If the W-WAN card is installed, it can be enabled /
-	disabled through the "wwan_enable" thinkpad-acpi device
-	attribute, and its current status can also be queried.
-
-	enable:
-		- 0: disables WWAN card / WWAN card is disabled
-		- 1: enables WWAN card / WWAN card is enabled.
-
-	Note: this interface has been superseded by the	generic rfkill
-	class.  It has been deprecated, and it will be removed in year
-	2010.
-
-	rfkill controller switch "tpacpi_wwan_sw": refer to
-	Documentation/rfkill.txt for details.
-
-
-EXPERIMENTAL: UWB
------------------
-
-This feature is considered EXPERIMENTAL because it has not been extensively
-tested and validated in various ThinkPad models yet.  The feature may not
-work as expected. USE WITH CAUTION! To use this feature, you need to supply
-the experimental=1 parameter when loading the module.
-
-sysfs rfkill class: switch "tpacpi_uwb_sw"
-
-This feature exports an rfkill controller for the UWB device, if one is
-present and enabled in the BIOS.
-
-Sysfs notes
-^^^^^^^^^^^
-
-	rfkill controller switch "tpacpi_uwb_sw": refer to
-	Documentation/rfkill.txt for details.
-
-Adaptive keyboard
------------------
-
-sysfs device attribute: adaptive_kbd_mode
-
-This sysfs attribute controls the keyboard "face" that will be shown on the
-Lenovo X1 Carbon 2nd gen (2014)'s adaptive keyboard. The value can be read
-and set.
-
-- 1 = Home mode
-- 2 = Web-browser mode
-- 3 = Web-conference mode
-- 4 = Function mode
-- 5 = Layflat mode
-
-For more details about which buttons will appear depending on the mode, please
-review the laptop's user guide:
-http://www.lenovo.com/shop/americas/content/user_guides/x1carbon_2_ug_en.pdf
-
-Multiple Commands, Module Parameters
-------------------------------------
-
-Multiple commands can be written to the proc files in one shot by
-separating them with commas, for example::
-
-	echo enable,0xffff > /proc/acpi/ibm/hotkey
-	echo lcd_disable,crt_enable > /proc/acpi/ibm/video
-
-Commands can also be specified when loading the thinkpad-acpi module,
-for example::
-
-	modprobe thinkpad_acpi hotkey=enable,0xffff video=auto_disable
-
-
-Enabling debugging output
--------------------------
-
-The module takes a debug parameter which can be used to selectively
-enable various classes of debugging output, for example::
-
-	 modprobe thinkpad_acpi debug=0xffff
-
-will enable all debugging output classes.  It takes a bitmask, so
-to enable more than one output class, just add their values.
-
-	=============		======================================
-	Debug bitmask		Description
-	=============		======================================
-	0x8000			Disclose PID of userspace programs
-				accessing some functions of the driver
-	0x0001			Initialization and probing
-	0x0002			Removal
-	0x0004			RF Transmitter control (RFKILL)
-				(bluetooth, WWAN, UWB...)
-	0x0008			HKEY event interface, hotkeys
-	0x0010			Fan control
-	0x0020			Backlight brightness
-	0x0040			Audio mixer/volume control
-	=============		======================================
-
-There is also a kernel build option to enable more debugging
-information, which may be necessary to debug driver problems.
-
-The level of debugging information output by the driver can be changed
-at runtime through sysfs, using the driver attribute debug_level.  The
-attribute takes the same bitmask as the debug module parameter above.
-
-
-Force loading of module
------------------------
-
-If thinkpad-acpi refuses to detect your ThinkPad, you can try to specify
-the module parameter force_load=1.  Regardless of whether this works or
-not, please contact ibm-acpi-devel@lists.sourceforge.net with a report.
-
-
-Sysfs interface changelog
-^^^^^^^^^^^^^^^^^^^^^^^^^
-
-=========	===============================================================
-0x000100:	Initial sysfs support, as a single platform driver and
-		device.
-0x000200:	Hot key support for 32 hot keys, and radio slider switch
-		support.
-0x010000:	Hot keys are now handled by default over the input
-		layer, the radio switch generates input event EV_RADIO,
-		and the driver enables hot key handling by default in
-		the firmware.
-
-0x020000:	ABI fix: added a separate hwmon platform device and
-		driver, which must be located by name (thinkpad)
-		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 a 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 semantics (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
-
-0x020300:	hotkey enable/disable support removed, attributes
-		hotkey_bios_enabled and hotkey_enable deprecated and
-		marked for removal.
-
-0x020400:	Marker for 16 LEDs support.  Also, LEDs that are known
-		to not exist in a given model are not registered with
-		the LED sysfs class anymore.
-
-0x020500:	Updated hotkey driver, hotkey_mask is always available
-		and it is always able to disable hot keys.  Very old
-		thinkpads are properly supported.  hotkey_bios_mask
-		is deprecated and marked for removal.
-
-0x020600:	Marker for backlight change event support.
-
-0x020700:	Support for mute-only mixers.
-		Volume control in read-only mode by default.
-		Marker for ALSA mixer support.
-
-0x030000:	Thermal and fan sysfs attributes were moved to the hwmon
-		device instead of being attached to the backing platform
-		device.
-=========	===============================================================
diff --git a/Documentation/laptops/toshiba_haps.rst b/Documentation/laptops/toshiba_haps.rst
deleted file mode 100644
index 11dfc428c080..000000000000
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-====================================
-Toshiba HDD Active Protection Sensor
-====================================
-
-Kernel driver: toshiba_haps
-
-Author: Azael Avalos <coproscefalo@gmail.com>
-
-
-.. 0. Contents
-
-   1. Description
-   2. Interface
-   3. Accelerometer axes
-   4. Supported devices
-   5. Usage
-
-
-1. Description
---------------
-
-This driver provides support for the accelerometer found in various Toshiba
-laptops, being called "Toshiba HDD Protection - Shock Sensor" officially,
-and detects laptops automatically with this device.
-On Windows, Toshiba provided software monitors this device and provides
-automatic HDD protection (head unload) on sudden moves or harsh vibrations,
-however, this driver only provides a notification via a sysfs file to let
-userspace tools or daemons act accordingly, as well as providing a sysfs
-file to set the desired protection level or sensor sensibility.
-
-
-2. Interface
-------------
-
-This device comes with 3 methods:
-
-====	=====================================================================
-_STA    Checks existence of the device, returning Zero if the device does not
-	exists or is not supported.
-PTLV    Sets the desired protection level.
-RSSS    Shuts down the HDD protection interface for a few seconds,
-	then restores normal operation.
-====	=====================================================================
-
-Note:
-  The presence of Solid State Drives (SSD) can make this driver to fail loading,
-  given the fact that such drives have no movable parts, and thus, not requiring
-  any "protection" as well as failing during the evaluation of the _STA method
-  found under this device.
-
-
-3. Accelerometer axes
----------------------
-
-This device does not report any axes, however, to query the sensor position
-a couple HCI (Hardware Configuration Interface) calls (0x6D and 0xA6) are
-provided to query such information, handled by the kernel module toshiba_acpi
-since kernel version 3.15.
-
-
-4. Supported devices
---------------------
-
-This driver binds itself to the ACPI device TOS620A, and any Toshiba laptop
-with this device is supported, given the fact that they have the presence of
-conventional HDD and not only SSD, or a combination of both HDD and SSD.
-
-
-5. Usage
---------
-
-The sysfs files under /sys/devices/LNXSYSTM:00/LNXSYBUS:00/TOS620A:00/ are:
-
-================   ============================================================
-protection_level   The protection_level is readable and writeable, and
-		   provides a way to let userspace query the current protection
-		   level, as well as set the desired protection level, the
-		   available protection levels are:
-
-		   ============   =======   ==========   ========
-		   0 - Disabled   1 - Low   2 - Medium   3 - High
-		   ============   =======   ==========   ========
-
-reset_protection   The reset_protection entry is writeable only, being "1"
-		   the only parameter it accepts, it is used to trigger
-		   a reset of the protection interface.
-================   ============================================================