This patch documents the recommendation as per Intel GPIO BWG on
GPIO PAD lock configuration.
As per GPIO BWG, it's recommended to change the Pad Reset Config
for lock GPP as `Power Good` so that pad configuration and lock
bit can be reset at the same time.
Refer to Intel doc:630603 for details.
Signed-off-by: Subrata Banik <subratabanik@google.com>
Change-Id: I3faf5dfc28c8c2dbc322db80a59f44a29002673c
Reviewed-on: https://review.coreboot.org/c/coreboot/+/61000
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: EricR Lai <ericr_lai@compal.corp-partner.google.com>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Michael Niewöhner <foss@mniewoehner.de>
Private changes on Gerrit are a tricky beast in that they're well hidden
in the UI and a few other places but still reachable under certain
circumstances.
Change-Id: I1c8c6cccfd023bc1d839dc5d9544204c88f89c7e
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/59229
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Singer <felixsinger@posteo.net>
These issues were found and fixed by codespell, a useful tool for
finding spelling errors.
Signed-off-by: Martin Roth <martin@coreboot.org>
Change-Id: If2a8e97911420c19e9365d5c28810b998f2c2ac8
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58078
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
The "silentoldconfig" target has been removed in Linux 5.13's kconfig
(CB:37152). As explained by Michal Marek at
https://lkml.org/lkml/2011/8/31/189, the "silentoldconfig" target has
become an internal interface and "oldconfig" is just as silent now.
Therefore, correct the target for syntax checking.
Change-Id: I8416bd4a96d15415f46c591ceb26ebb29aef1ab0
Signed-off-by: Yu-Ping Wu <yupingso@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/56878
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: Jakub Czapiga <jacz@semihalf.com>
This was originally several commits that had to be squashed into one
because the intermediate states weren't able to build coreboot:
- one to remove everything that wasn't our own code, leaving only
regex.[ch], toada.c, description.md and Makefile.inc.
- one to copy in Linux 5.13's scripts/kconfig and adapt Makefile.inc
to make the original Makefile work again.
- adapt abuild to use olddefconfig, simplifying matters.
- apply patches in util/kconfig/patches.
- Some more adaptations to the libpayload build system.
The patches are now in util/kconfig/patches/, reverse applying them
should lead to a util/kconfig/ tree that contains exactly the Linux
version + our own 5 files.
Change-Id: Ia0e8fe4e9022b278f34ab113a433ef4d45e5c355
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37152
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Soft straps, that can be configured by the vendor in the Intel Flash
Image Tool (FIT), can influence some pads' default state. It is possible
to select either a native function or GPIO mode for some pads on
non-server SoCs, while on server SoCs most pads can be controlled.
Thus, add a recommendation to always configure all pads for a board to
guarantee integrity between different board or vendor firmware revisions
where the soft straps might have been changed.
Change-Id: I33063a3f6a1c9cd5267d85f7da84deb554489a26
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/52297
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Intel PDGs starting from Skylake / Sunrise Point state that, different
from the general recommendation in digital electronics, unconnected
GPIOs defaulting to GPIO mode do explicitly not require termination.
The reason for this is, that these GPIOs have the `GPIORXDIS` bit set,
which effectively disconnects the pad from the internal logic by
disabling the input buffer.
This bit - besides `GPIOTXDIS` - can also be set explicitly by using
the gpio macro `PAD_NC(pad, NONE)`.
In some cases, a pull resistor may be required due to bad board design
or when a vendor sets the RX/TX disable bits together with a pull
resistor and schematics are not available to check if the pad is really
unconnected or just unused. In this case the pull resistor should be
kept.
Pads defaulting to native functions usually don't need special handling.
However, when pads requiring external pull-ups are missing these due to
bad board design, they should be configured with `PAD_NC` to disconnect
them internally.
Rewrite the documentation to reflect these new findings.
Also clarify the comment in soc/intel gpio code accordingly.
Change-Id: Id01b197ebe8f2b8bb4ecf3d119ec2298b26d9be0
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/52139
Reviewed-by: Tim Crawford <tcrawford@system76.com>
Reviewed-by: Felix Singer <felixsinger@posteo.net>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Document the roles we have on review.coreboot.org, the expectations
associated with them, and how to become part of any of these groups.
Change-Id: Ib31083f5a07bd89efd13ecd6aaf34a69d438d59d
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/52265
Reviewed-by: Felix Singer <felixsinger@posteo.net>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
It’s good practice to put the unit into the name.
Change-Id: I1493f61d4e495c22f09abf1829bb2eab9b1fd2b6
Signed-off-by: Paul Menzel <pmenzel@molgen.mpg.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50517
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Drop LPC pad configuration code since all boards now do pad
configuration on their own. The comment about LPC_CLKRUNB when using
eSPI is moved to `Documentation/getting_started/gpio.md`.
Change-Id: I710d6aee8c3b2c8282cd321cd0688b9b26abea07
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49410
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
When the declaration is done after the default, menuconfig will see that
symbol defined at the first place where kconfig tool will find it.
For example, if we run menuconfig and search for 'MAINBOARD_VENDOR', we
will see it defined at ""src/mainboard/51nb/Kconfig" which is odd.
Change-Id: I215a1817e60e6deb6931679f139d110ba762d3c8
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45127
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Nico Huber <nico.h@gmx.de>
They're more or less the same but reworked for hopefully some more
clarity. There have been some best practices around documenting the
reason for expedited processing so let's make them official, too.
Change-Id: I620e48016a1ceda2ac43f26624ed21af01f6a0a5
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43484
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This macro is not correct because the RX Level/Edge Configuration
(trig) and the GPIO Tx/Rx Buffer Disable (bufdis) fields in DW0
register do not affect on the pad in the native function mode.
This is part of the patch set
"src/mb/*, src/soc/intel/common/gpio: Remove PAD_CFG_NF_BUF_TRIG ":
CB:43455 - cedarisland: undo set trig and bufdis for NF pads
CB:43454 - tiogapass: undo set trig and bufdis for NF pads
CB:43561 - h110m: undo set trig and bufdis for NF pads
CB:43569 - soc/intel/common/gpio_defs: Remove PAD_CFG_NF_BUF_TRIG
Change-Id: Ic0416e3f67016c648f0886df73f585e8a08d4e92
Signed-off-by: Maxim Polyakov <max.senia.poliak@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43569
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Lance Zhao
Reviewed-by: Michael Niewöhner
The resource allocator woes post-4.12 release showed room for
improvement on both discussion and documentation. To encourage this
(and encourage reviewers to look out for issues in that space),
extend the review guidelines so that they encourage to more clearly
document the reason for a change with the change (commit message or
our documentation) and also to loop in the mailing list.
Change-Id: I1962dba3fe7e1a01fa4c8b0058297c7d050cb7b7
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41493
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
The new documentation describes typical ways that mainboards will
set up their GPIOs, as well as the distinction between "early"
and "normal" GPIOs. It also describes the typical properties
that GPIO configuration will cover.
Change-Id: I279eec4ed2bb0248a2bdb363fb73b40b8272267f
Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37802
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Justin TerAvest <teravest@chromium.org>
Also update the known-good versions of the needed tools.
Change-Id: I0f63860beb0a8a00360752318236e302c7170977
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37952
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Using docker to build to documentation eases the process of building
the documentation. Given that some versions of sphinx are
incompatible, the option to use docker is presented first.
Change-Id: I6c18f81a829364ada1859c04ba2dc4f886934bcc
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36105
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This removes the need for COREBOOT_BUILD_DIR in Kconfig. Since the
original files will be replaced with the tmp file, the parent directory
already needs to be writable.
Before this change, the tmp files would be created in the CWD (src) if
COREBOOT_BUILD_DIR was not specified.
BUG=b:112267918
TEST=emerge-grunt coreboot and verified no tmp files were created in the
src directory.
Change-Id: Icdaf2ff3dd1ec98813b75ef55b96e38e1ca19ec7
Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34244
Reviewed-by: Martin Roth <martinroth@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
We keep its definition in libpayload, though, to maintain compatibility
with existing payload code. For now.
Change-Id: I8fc0d0136ba2316ef393c5c17f2b3ac3a9c6328d
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32230
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Allow the use of CSV files if properly referenced from markdown.
Sphinx will parse the file and create a human readable table,
allowing easy integration of autogenerated files.
Change-Id: I6fa13acf67ff1c6c9e3985054405c5446808da03
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32251
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Describe the coreboot stages, given a short introduction what is done
and add a chart for coreboot's vs EDK II bootflow as well as the source
for the SVG.
TODO: Describe stages in detail in a separate commit.
Change-Id: I98cb61b1d0d29ac9d03f5ef3644d51a8e14bad74
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32123
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>
Gerrit dropped the "draft" concept and replaced it with private commits
and work-in-progress commits, options that can be used independently
from each other.
Change-Id: I6abe267c2091c750fc234057be3a4e62adb59c4c
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://review.coreboot.org/c/30309
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
When the old syntax is used, gerrit now respends with:
remote: WARNING: deprecated topic syntax. Use %topic=TOPIC instead
Change-Id: I002bfc3e9c4b348379337bc386d3bdefb307679d
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Reviewed-on: https://review.coreboot.org/c/29983
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
They are unnecessary in headings, and look slightly irritating in the
table of contents.
Change-Id: I7344026f5753aebdd73f9fe414e96730c823ac26
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Reviewed-on: https://review.coreboot.org/28832
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Explain recommonmark's auto_toc_tree and give an example to make writing
documentation easier. Show an example what happens if the document
isn't included in any toctree.
Change-Id: I4938d8d292ea890caec6d396b4fa04da65e398f4
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/28427
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tom Hiller <thrilleratplay@gmail.com>
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
According to recommonmark's documentation the enable_auto_doc_ref is deprecated.
This is not true, as it's broken with Sphinx 1.6+ commit
12d639873953847de31ec99742b42e50e89ed58c.
recommonmark bug report is here: https://github.com/rtfd/recommonmark/issues/73
Instead of using this feature, which doesn't support top level directories in
the relative document path anyway, use the TOC tree or inline RST code.
Disable auto_doc_ref and document how to reference documents.
Change-Id: I9319985b504c4215c33ebbeb9c38317b9efcb283
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/28550
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tom Hiller <thrilleratplay@gmail.com>
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
python-recommonmark is need for sphinx to be able to hande the markdown
documentation.
Change-Id: I9513ab4bdc753e0350754d9869239ea833893af9
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/27631
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
refs/drafts/master is deprecated
Change-Id: I9c68e496ecd47fb559dd2ad400406007028cbb24
Signed-off-by: Tom Hiller <thrilleratplay@gmail.com>
Reviewed-on: https://review.coreboot.org/27526
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Marc Jones <marc@marcjonesconsulting.com>
Tested-by: Marc Jones <marc@marcjonesconsulting.com>
Add CC-by 4.0 license written in markdown and add global copyright string.
Change-Id: I31dc540d63b289d38d6d7d9a7c35b6bb50f9c92d
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/26264
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
* Add more subdirectories and index.mds.
* Move "getting started" and "lessons" into sub-directories.
* Move "NativeRaminit" into northbridge/intel/sandybridge folder.
* Move "MultiProcessorInit" into soc/intel/icelake folder.
* Reference new files
Change-Id: I78c3ec0e8bcc342686277ae141a88d0486680978
Signed-off-by: Philipp Deppenwiese <zaolin@das-labor.org>
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/26262
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Subrata Banik