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Vaibhav Shankar 6e5609124e mainboard/google/reef: Set edge triggered interrupt for GPIO_22
EC sets the logic level based on outstanding wake events. When GPIO_22
is configured as a level triggered interrupt, the events are not
cleared from the interrupt handler. Hence, we'd just be re-signalling
over and over causing an interrupt storm upon lid open. So, GPIO_22
needs to be configured as EDGE_SINGLE instead of LEVEL.

BUG=chrome-os-partner:62458
TEST=Lid close/open. check CPU usage using top. It should
not show 70% CPU usage.

Signed-off-by: Vaibhav Shankar <vaibhav.shankar@intel.com>

Change-Id: I710a690578c6e5b63be34b7fbcb21c703ef56e3a
Reviewed-on: https://review.coreboot.org/18267
Tested-by: build bot (Jenkins)
Reviewed-by: Venkateswarlu V Vinjamuri <venkateswarlu.v.vinjamuri@intel.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
2017-01-31 15:17:38 +01:00
3rdparty 3rdparty: update arm-trusted-firmware submodule 2017-01-12 18:38:26 +01:00
Documentation Documentation: Add Kconfig document 2016-11-13 21:41:44 +01:00
configs configs/builder: Remove pre-defined VGA bios file 2017-01-20 17:37:19 +01:00
payloads SeaBIOS Kconfig: Update logging 2017-01-27 19:46:26 +01:00
src mainboard/google/reef: Set edge triggered interrupt for GPIO_22 2017-01-31 15:17:38 +01:00
util autoport: add missing parameter for pc_keyboard_init() 2017-01-29 00:36:24 +01:00
.checkpatch.conf Update .checkpatch.conf 2016-09-02 18:22:04 +02:00
.clang-format
.gitignore .gitignore: Don’t track Tint directory 2017-01-22 21:15:58 +01:00
.gitmodules Set up 3rdparty/libgfxinit 2016-10-29 01:35:03 +02:00
.gitreview
COPYING
MAINTAINERS MAINTAINERS: Add lowrisc files to RISC-V 2016-11-12 19:30:26 +01:00
Makefile Makefile: Just error out if no .config exists 2017-01-27 19:43:24 +01:00
Makefile.inc Only add etc/ps2-keyboard-spinup when not updating an image 2017-01-27 02:09:38 +01:00
README Remove extra newlines from the end of all coreboot files. 2016-07-31 18:19:33 +02:00
gnat.adc gnat.adc: Do not generate assertion code for Refined_Post 2016-10-29 01:33:31 +02:00
toolchain.inc Add minimal GNAT run time system (RTS) 2016-09-19 11:14:49 +02:00

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

 * make
 * gcc / g++
   Because Linux distribution compilers tend to use lots of patches. coreboot
   does lots of "unusual" things in its build system, some of which break due
   to those patches, sometimes by gcc aborting, sometimes - and that's worse -
   by generating broken object code.
   Two options: use our toolchain (eg. make crosstools-i386) or enable the
   ANY_TOOLCHAIN Kconfig option if you're feeling lucky (no support in this
   case).
 * iasl (for targets with ACPI support)

Optional:

 * doxygen (for generating/viewing documentation)
 * gdb (for better debugging facilities on some targets)
 * ncurses (for 'make menuconfig' and 'make nconfig')
 * 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.