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Caveh Jalali 2320c03087 ec/google/chromeec: Simplify KEYBOARD_BACKLIGHT error handling 
Simplify the implementation of setting the keyboard backlight PWM
value. Host command stubs typcially don't need to examine the host
command's return value as stored in cmd_code because that level of
detail is not very interesting. Higher value error codes are returned in
actual result structures.

This host command can return EC_RES_ERROR for out of range PWM values
which is already a generic error and unlikely to happen since we already
limit the range to 0..100 here. Finally, none of the callers in coreboot
check the return value.

BUG=b:258126464
BRANCH=none
TEST=none

Change-Id: If17bc4e31baba02ba2f7ae8e7a5cbec7f97688c5
Signed-off-by: Caveh Jalali <caveh@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/69369
Reviewed-by: Daisuke Nojiri <dnojiri@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
 		2022-11-10 15:09:48 +00:00
3rdparty 3rdparty/blobs: Advance submodule pointer 2022-11-07 14:20:07 +00:00
Documentation Documentation/drivers: Update section on touchscreen runtime detection 2022-11-07 14:17:46 +00:00
LICENSES src/mb: Update unlicensable files with the CC-PDDC SPDX ID 2022-08-13 19:25:12 +00:00
configs configs: Build test STB features on google skyrim 2022-11-10 12:51:15 +00:00
payloads payloads: Make PAYLOAD_NONE a bool outside of the choice 2022-11-04 13:44:59 +00:00
spd spd/lp5: Re-generate the SPD data 2022-10-28 12:06:29 +00:00
src ec/google/chromeec: Simplify KEYBOARD_BACKLIGHT error handling 2022-11-10 15:09:48 +00:00
tests lib/coreboot_table: Simplify API to set up lb_serial 2022-11-04 19:17:13 +00:00
util util/scripts: Add script to run abuild on specific SOCs 2022-11-10 00:19:55 +00:00
.checkpatch.conf checkpatch.conf: Ignore check for pointer comparisons to NULL 2022-09-22 15:13:35 +00:00
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AUTHORS arm/libgcc: Support signed 64-bit division 2022-08-13 17:20:32 +00:00
COPYING update license template. 2006-08-12 22:03:36 +00:00
MAINTAINERS MAINTAINERS: Make Misc Fixes 2022-10-30 01:48:45 +00:00
Makefile Makefile: Add targets to add and remove symlinks 2022-10-17 14:00:46 +00:00
Makefile.inc util/amdfwtool: Add build rules for amdfwread 2022-10-26 15:56:37 +00:00
README.md Treewide: Remove doxygen config files and targets 2022-05-28 01:24:51 +00:00
gnat.adc treewide: Remove "this file is part of" lines 2020-05-11 17:11:40 +00:00
toolchain.inc coreboot: Add support for include-what-you-use 2022-10-11 14:33:28 +00:00

README.md

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 https://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:

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)
  • pkg-config
  • libssl-dev (openssl)

Optional:

  • 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 https://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 https://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:

https://www.coreboot.org

You can contact us directly on the coreboot mailing list:

https://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.