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Duncan Laurie 612163ebaa chrome ec: Add ACPI Device for ALS if enabled
The EC can export ALS information if the sensor is attached
to it directly rather than to the host.  This adds a basic
ACPI ALS device and implements the required information.

The kernel does not use the _ALR tuple set but it is required
by the ACPI spec so this just adds the sample two point
response curve defined in ACPI 5.0 section 9.2.5.

The EC does not currently send events for lux value changes so
a polling interval of 1 second is defined.

BUG=chrome-os-partner:24208
BRANCH=None
TEST=build and boot on samus, add acpi-als driver to the kernel
and read /sys/bus/iio/devices/iio:device0/in_illuminance_raw

Original-Change-Id: Id29b72a68aa21c1a7c71d5f87223ac010cef0377
Original-Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/203743
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
(cherry picked from commit 81f44b33b87a6ee3079b8ef6efffacd0eeb0283f)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>

Change-Id: I5a0ccd30e8b453675beaf7d0363dbfa162bd5b3f
Reviewed-on: http://review.coreboot.org/8132
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
2015-01-09 07:43:34 +01:00
3rdparty@a8b0c52850 3rdparty: Update to latest commit in blobs repository 2014-12-28 16:04:03 +01:00
documentation Doxygen: add a "simple" output config and make target 2015-01-08 21:59:17 +01:00
payloads libpayload: Reorder default memcpy, speed up memset and memcmp 2015-01-09 07:08:43 +01:00
src chrome ec: Add ACPI Device for ALS if enabled 2015-01-09 07:43:34 +01:00
util inteltool: add `-s` to dump spi bar and bios_cntl registers 2015-01-08 17:49:58 +01:00
.gitignore .gitignore: add the doxygen directory. 2014-12-14 23:30:45 +01:00
.gitmodules nvidia/cbootimage: avoid upstream's build system 2014-10-02 10:26:58 +02:00
.gitreview
COPYING
Makefile Doxygen: add a "simple" output config and make target 2015-01-08 21:59:17 +01:00
Makefile.inc intel: Fix UPDATE-FIT step in build 2014-12-28 19:58:59 +01:00
README
toolchain.inc Add UCB RISCV support for architecture, soc, and emulation mainboard.. 2014-12-01 19:06:43 +01:00

README

-------------------------------------------------------------------------------
coreboot README
-------------------------------------------------------------------------------

coreboot is a Free Software project aimed at replacing the proprietary BIOS
(firmware) found in most computers.  coreboot performs a little bit of
hardware initialization and then executes additional boot logic, called a
payload.

With the separation of hardware initialization and later boot logic,
coreboot can scale from specialized applications that run directly
firmware, run operating systems in flash, load custom
bootloaders, or implement firmware standards, like PC BIOS services or
UEFI. This allows for systems to only include the features necessary
in the target application, reducing the amount of code and flash space
required.

coreboot was formerly known as LinuxBIOS.


Payloads
--------

After the basic initialization of the hardware has been performed, any
desired "payload" can be started by coreboot.

See http://www.coreboot.org/Payloads for a list of supported payloads.


Supported Hardware
------------------

coreboot supports a wide range of chipsets, devices, and mainboards.

For details please consult:

 * http://www.coreboot.org/Supported_Motherboards
 * http://www.coreboot.org/Supported_Chipsets_and_Devices


Build Requirements
------------------

 * gcc / g++
 * make

Optional:

 * doxygen (for generating/viewing documentation)
 * iasl (for targets with ACPI support)
 * gdb (for better debugging facilities on some targets)
 * ncurses (for 'make menuconfig')
 * flex and bison (for regenerating parsers)


Building coreboot
-----------------

Please consult http://www.coreboot.org/Build_HOWTO for details.


Testing coreboot Without Modifying Your Hardware
------------------------------------------------

If you want to test coreboot without any risks before you really decide
to use it on your hardware, you can use the QEMU system emulator to run
coreboot virtually in QEMU.

Please see http://www.coreboot.org/QEMU for details.


Website and Mailing List
------------------------

Further details on the project, a FAQ, many HOWTOs, news, development
guidelines and more can be found on the coreboot website:

  http://www.coreboot.org

You can contact us directly on the coreboot mailing list:

  http://www.coreboot.org/Mailinglist


Copyright and License
---------------------

The copyright on coreboot is owned by quite a large number of individual
developers and companies. Please check the individual source files for details.

coreboot is licensed under the terms of the GNU General Public License (GPL).
Some files are licensed under the "GPL (version 2, or any later version)",
and some files are licensed under the "GPL, version 2". For some parts, which
were derived from other projects, other (GPL-compatible) licenses may apply.
Please check the individual source files for details.

This makes the resulting coreboot images licensed under the GPL, version 2.