First ready to use version (no ref to upstream commit)

   NOTE! This copyright does *not* cover user programs that use kernel

 services by normal system calls - this is merely considered normal use

 of the kernel, and does *not* fall under the heading of "derived work".

 Also note that the GPL below is copyrighted by the Free Software

 Foundation, but the instance of code that it refers to (the Linux

 kernel) is copyrighted by me and others who actually wrote it.

 Also note that the only valid version of the GPL as far as the kernel

 is concerned is _this_ particular version of the license (ie v2, not

 v2.2 or v3.x or whatever), unless explicitly otherwise stated.

			Linus Torvalds

----------------------------------------

		    GNU GENERAL PUBLIC LICENSE

		       Version 2, June 1991

 Copyright (C) 1989, 1991 Free Software Foundation, Inc.

                       51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

 Everyone is permitted to copy and distribute verbatim copies

 of this license document, but changing it is not allowed.

			    Preamble

  The licenses for most software are designed to take away your

freedom to share and change it.  By contrast, the GNU General Public

License is intended to guarantee your freedom to share and change free

software--to make sure the software is free for all its users.  This

General Public License applies to most of the Free Software

Foundation's software and to any other program whose authors commit to

using it.  (Some other Free Software Foundation software is covered by

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  When we speak of free software, we are referring to freedom, not

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  To protect your rights, we need to make restrictions that forbid

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These restrictions translate to certain responsibilities for you if you

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  For example, if you distribute copies of such a program, whether

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  We protect your rights with two steps: (1) copyright the software, and

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  The precise terms and conditions for copying, distribution and

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		    GNU GENERAL PUBLIC LICENSE

   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

  0. This License applies to any program or other work which contains

a notice placed by the copyright holder saying it may be distributed

under the terms of this General Public License.  The "Program", below,

refers to any such program or work, and a "work based on the Program"

means either the Program or any derivative work under copyright law:

that is to say, a work containing the Program or a portion of it,

either verbatim or with modifications and/or translated into another

language.  (Hereinafter, translation is included without limitation in

the term "modification".)  Each licensee is addressed as "you".

Activities other than copying, distribution and modification are not

covered by this License; they are outside its scope.  The act of

running the Program is not restricted, and the output from the Program

is covered only if its contents constitute a work based on the

Program (independent of having been made by running the Program).

Whether that is true depends on what the Program does.

  1. You may copy and distribute verbatim copies of the Program's

source code as you receive it, in any medium, provided that you

conspicuously and appropriately publish on each copy an appropriate

copyright notice and disclaimer of warranty; keep intact all the

notices that refer to this License and to the absence of any warranty;

and give any other recipients of the Program a copy of this License

along with the Program.

You may charge a fee for the physical act of transferring a copy, and

you may at your option offer warranty protection in exchange for a fee.

  2. You may modify your copy or copies of the Program or any portion

of it, thus forming a work based on the Program, and copy and

distribute such modifications or work under the terms of Section 1

above, provided that you also meet all of these conditions:

    a) You must cause the modified files to carry prominent notices

    stating that you changed the files and the date of any change.

    b) You must cause any work that you distribute or publish, that in

    whole or in part contains or is derived from the Program or any

    part thereof, to be licensed as a whole at no charge to all third

    parties under the terms of this License.

    c) If the modified program normally reads commands interactively

    when run, you must cause it, when started running for such

    interactive use in the most ordinary way, to print or display an

    announcement including an appropriate copyright notice and a

    notice that there is no warranty (or else, saying that you provide

    a warranty) and that users may redistribute the program under

    these conditions, and telling the user how to view a copy of this

    License.  (Exception: if the Program itself is interactive but

    does not normally print such an announcement, your work based on

    the Program is not required to print an announcement.)

These requirements apply to the modified work as a whole.  If

identifiable sections of that work are not derived from the Program,

and can be reasonably considered independent and separate works in

themselves, then this License, and its terms, do not apply to those

sections when you distribute them as separate works.  But when you

distribute the same sections as part of a whole which is a work based

on the Program, the distribution of the whole must be on the terms of

this License, whose permissions for other licensees extend to the

entire whole, and thus to each and every part regardless of who wrote it.

Thus, it is not the intent of this section to claim rights or contest

your rights to work written entirely by you; rather, the intent is to

exercise the right to control the distribution of derivative or

collective works based on the Program.

In addition, mere aggregation of another work not based on the Program

with the Program (or with a work based on the Program) on a volume of

a storage or distribution medium does not bring the other work under

the scope of this License.

  3. You may copy and distribute the Program (or a work based on it,

under Section 2) in object code or executable form under the terms of

Sections 1 and 2 above provided that you also do one of the following:

    a) Accompany it with the complete corresponding machine-readable

    source code, which must be distributed under the terms of Sections

    1 and 2 above on a medium customarily used for software interchange; or,

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    years, to give any third party, for a charge no more than your

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    customarily used for software interchange; or,

    c) Accompany it with the information you received as to the offer

    to distribute corresponding source code.  (This alternative is

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    received the program in object code or executable form with such

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The source code for a work means the preferred form of the work for

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If distribution of executable or object code is made by offering

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compelled to copy the source along with the object code.

  4. You may not copy, modify, sublicense, or distribute the Program

except as expressly provided under this License.  Any attempt

otherwise to copy, modify, sublicense or distribute the Program is

void, and will automatically terminate your rights under this License.

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license would not permit royalty-free redistribution of the Program by

all those who receive copies directly or indirectly through you, then

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refrain entirely from distribution of the Program.

If any portion of this section is held invalid or unenforceable under

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It is not the purpose of this section to induce you to infringe any

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integrity of the free software distribution system, which is

implemented by public license practices.  Many people have made

generous contributions to the wide range of software distributed

through that system in reliance on consistent application of that

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to distribute software through any other system and a licensee cannot

impose that choice.

This section is intended to make thoroughly clear what is believed to

be a consequence of the rest of this License.

  8. If the distribution and/or use of the Program is restricted in

certain countries either by patents or by copyrighted interfaces, the

original copyright holder who places the Program under this License

may add an explicit geographical distribution limitation excluding

those countries, so that distribution is permitted only in or among

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the limitation as if written in the body of this License.

  9. The Free Software Foundation may publish revised and/or new versions

of the General Public License from time to time.  Such new versions will

be similar in spirit to the present version, but may differ in detail to

address new problems or concerns.

Each version is given a distinguishing version number.  If the Program

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  10. If you wish to incorporate parts of the Program into other free

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			    NO WARRANTY

  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY

FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN

OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES

PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED

OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF

MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS

TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE

PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,

REPAIR OR CORRECTION.

  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING

WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR

REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,

INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING

OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED

TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY

YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER

PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE

POSSIBILITY OF SUCH DAMAGES.

		     END OF TERMS AND CONDITIONS

	    How to Apply These Terms to Your New Programs

  If you develop a new program, and you want it to be of the greatest

possible use to the public, the best way to achieve this is to make it

free software which everyone can redistribute and change under these terms.

  To do so, attach the following notices to the program.  It is safest

to attach them to the start of each source file to most effectively

convey the exclusion of warranty; and each file should have at least

the "copyright" line and a pointer to where the full notice is found.

    <one line to give the program's name and a brief idea of what it does.>

    Copyright (C) <year>  <name of author>

    This program is free software; you can redistribute it and/or modify

    it under the terms of the GNU General Public License as published by

    the Free Software Foundation; either version 2 of the License, or

    (at your option) any later version.

    This program is distributed in the hope that it will be useful,

    but WITHOUT ANY WARRANTY; without even the implied warranty of

    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License

    along with this program; if not, write to the Free Software

    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

Also add information on how to contact you by electronic and paper mail.

If the program is interactive, make it output a short notice like this

when it starts in an interactive mode:

    Gnomovision version 69, Copyright (C) year name of author

    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.

    This is free software, and you are welcome to redistribute it

    under certain conditions; type `show c' for details.

The hypothetical commands `show w' and `show c' should show the appropriate

parts of the General Public License.  Of course, the commands you use may

be called something other than `show w' and `show c'; they could even be

mouse-clicks or menu items--whatever suits your program.

You should also get your employer (if you work as a programmer) or your

school, if any, to sign a "copyright disclaimer" for the program, if

necessary.  Here is a sample; alter the names:

  Yoyodyne, Inc., hereby disclaims all copyright interest in the program

  `Gnomovision' (which makes passes at compilers) written by James Hacker.

  <signature of Ty Coon>, 1 April 1989

  Ty Coon, President of Vice

This General Public License does not permit incorporating your program into

proprietary programs.  If your program is a subroutine library, you may

consider it more useful to permit linking proprietary applications with the

library.  If this is what you want to do, use the GNU Library General

Public License instead of this License.

TDK/InvenSense CH101 UltraSonic device

https://invensense.tdk.com/products/ch101/

Required properties:

 - compatible : should be one of

		"invensense,ch101"

 		"invensense,ch201"

 - reg : the I2C address of the sensor

 - rst-gpios: reset pin

 - rtc_rst-gpios: rtc reset

 - prg-gpios: program pin.

 - interrupts: interrupt mapping for IRQ. It should be configured with flags

   IRQ_TYPE_EDGE_RISING, or IRQ_TYPE_EDGE_FALLING.

  Refer to interrupt-controller/interrupts.txt for generic interrupt client node

  bindings.

Example:

        ch101_0: ch101_1@45 {

                compatible = "invensense,ch101";

                reg = <0x45>;

                rst-gpios = <&tlmm 140 GPIO_ACTIVE_HIGH>;

                rtc_rst-gpios = <&tlmm 0 GPIO_ACTIVE_HIGH>;

                prg-gpios = <0 1 2>;

                int-gpios = <&tlmm 122 GPIO_ACTIVE_HIGH>,

                            <&tlmm 123 GPIO_ACTIVE_HIGH>,

	}

#

# Proximity sensors

#

menu "Lightning sensors"

config AS3935

	tristate "AS3935 Franklin lightning sensor"

	select IIO_BUFFER

	select IIO_TRIGGERED_BUFFER

	depends on SPI

	help

	  Say Y here to build SPI interface support for the Austrian

	  Microsystems AS3935 lightning detection sensor.

	  To compile this driver as a module, choose M here: the

	  module will be called as3935

endmenu

menu "Proximity and distance sensors"

source "drivers/iio/proximity/inv_ch101/Kconfig"

config ISL29501

	tristate "Intersil ISL29501 Time Of Flight sensor"

	depends on I2C

	select IIO_BUFFER

	select IIO_TRIGGERED_BUFFER

	select IIO_KFIFO_BUF

	help

	  Say Y here if you want to build a driver for the Intersil ISL29501

	  Time of Flight sensor.

	  To compile this driver as a module, choose M here: the module will be

	  called isl29501.

config LIDAR_LITE_V2

	tristate "PulsedLight LIDAR sensor"

	select IIO_BUFFER

	select IIO_TRIGGERED_BUFFER

	depends on I2C

	help

	  Say Y to build a driver for PulsedLight LIDAR range finding

	  sensor.

	  To compile this driver as a module, choose M here: the

	  module will be called pulsedlight-lite-v2

config RFD77402

	tristate "RFD77402 ToF sensor"

	depends on I2C

	help

	  Say Y to build a driver for the RFD77420 Time-of-Flight (distance)

	  sensor module with I2C interface.

	  To compile this driver as a module, choose M here: the

	  module will be called rfd77402.

config SRF04

	tristate "Devantech SRF04 ultrasonic ranger sensor"

	depends on GPIOLIB

	help

	  Say Y here to build a driver for Devantech SRF04 ultrasonic

	  ranger sensor. This driver can be used to measure the distance

	  of objects. It is using two GPIOs.

	  To compile this driver as a module, choose M here: the

	  module will be called srf04.

config SX9500

	tristate "SX9500 Semtech proximity sensor"

	select IIO_BUFFER

	select IIO_TRIGGERED_BUFFER

	select REGMAP_I2C

	depends on I2C

	help

	  Say Y here to build a driver for Semtech's SX9500 capacitive

	  proximity/button sensor.

	  To compile this driver as a module, choose M here: the

	  module will be called sx9500.

config SRF08

	tristate "Devantech SRF02/SRF08/SRF10 ultrasonic ranger sensor"

	select IIO_BUFFER

	select IIO_TRIGGERED_BUFFER

	depends on I2C

	help

	  Say Y here to build a driver for Devantech SRF02/SRF08/SRF10

	  ultrasonic ranger sensors with i2c interface.

	  This driver can be used to measure the distance of objects.

	  To compile this driver as a module, choose M here: the

	  module will be called srf08.

endmenu