* Add function to generate unique _UID using CRC32
* Add function to write the _UID based on a device's ACPI path
ACPI devices that have the same _HID must use different _UID.
Linux doesn't care about _UID if it's not used.
Windows 10 verifies the ACPI code on boot and BSODs if two devices
with the same _HID share the same _UID.
Fixes BSOD seen on Windows 10.
Change-Id: I47cd5396060d325f9ce338afced6af021e7ff2b4
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37695
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
The table in Documentation/acpi/gpio.md is currently detected as
free-form text (at least by GitHub and recommonmark), instead of a
table. Wrap it in a code formatting block to preserve the manual
formatting.
Change-Id: If460d7f1ba1a6198d949886f0f55fd6254bc2f7a
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Reviewed-on: https://review.coreboot.org/25679
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Only the document title should be a top-level heading ('#'). Everything
else should be a second- over lower-level heading ('##').
Also remove the '#' sign at the end of heading lines. "# Foo #" is
mentioned as a valid syntax variant at [1], but it's quite uncommon.
[1]: https://daringfireball.net/projects/markdown/syntax#header
Change-Id: Ida16c3ecaa22e8439007673cb943d04952e19471
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Reviewed-on: https://review.coreboot.org/25678
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
The word 'coreboot' should always be written in lowercase, even at the
start of a sentence.
Unfortunately, some external websites and projects are spelling coreboot
with an uppercase C, so references to those pages can't be changed
without breaking the link.
Change-Id: I79824da8a9ed36a1e4fe23a1711a89535267bf5f
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/20031
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
In order to allow GPIOs to be set/clear according to their polarity,
provide helper functions that check for polarity and call set/clear
SoC functions for generating ACPI code.
BUG=None
BRANCH=None
TEST=Verified that the ACPI code generated remains the same as before
for reef.
Change-Id: Ie8bdb9dc18e61a4a658f1447d6f1db0b166d9c12
Signed-off-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/18427
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins)
This document provides information about the different functions that a
driver can use for generating ACPI code for toggling GPIO. These
functions are expected to be implemented by the SoC. It also defines the
different constraints on use of Local variables in ACPI code while
implementing these functions.
BUG=chrome-os-partner:55988
Change-Id: Ibc03d766afb6d7b75bc0dc9f79920b561f1c4a78
Signed-off-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/17128
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Patrick Rudolph