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2022-09-01Documentation: Move devicetree documentationMarc Jones
Move devicetree.md from acpi/ to getting_started/. The devicetree has nothing to do with ACPI and getting_started has the most similar information about coreboot. Change-Id: I873b293f036a9e3bcdc98135386f9158c645513c Signed-off-by: Marc Jones <marc@marcjonesconsulting.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/66916 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
2021-11-05Documentation/acpi/gpio.md: Update implementation detailsArthur Heymans
The weak functions were removed in bce7458 "acpi/acpigen.c: Remove weak gpio definition". Change-Id: Ia6e51698d6209fbf4f59b7fbc988a1aa696e366f Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/c/coreboot/+/58933 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
2021-10-05Documentation: Fix spelling errorsMartin Roth
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>
2021-09-07documentation: add a section on devicetree refsPeter Marheine
There is no existing documentation on how `device ref` and aliases work in the devicetree, and the behavior around devices not being in the same location is difficult to discern as well as somewhat unexpected. This should help prevent confusion leading to bugs such as the one fixed by https://review.coreboot.org/c/coreboot/+/57298 Change-Id: I4b30f7d531cfc3453d6523a76084f1969125b4bf Signed-off-by: Peter Marheine <pmarheine@chromium.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/57354 Reviewed-by: Edward O'Callaghan <quasisec@chromium.org> Reviewed-by: Angel Pons <th3fanbus@gmail.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2021-05-05drivers/i2c/generic: Set S0W to D3hot for wake deviceTony Huang
If device is supported as a wake source, _S0W should be set to D3hot. This ensures that the device is put into D3hot by the OSPM. Power resource(PRIC) for the device is listed in both _PR0 and _PR3. Thus, it ensures that the OSPM does not turn off power resource when device is put into D0 and D3hot. Hence, it is capable of waking the system from D3hot state. However, if it is put into D3cold, then the power resource is turned off by the OSPM. The devices we are currently looking at for touchscreen/touchpad do not really support auxiliary power and so do not support wake from D3cold. BUG=b:186070097 TEST=build and check device wake state _S0W set to 3 in ssdt table. Change-Id: I34e4b2350875530d3337be700276bcc4fb1f810a Signed-off-by: Tony Huang <tony-huang@quanta.corp-partner.google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/52847 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Furquan Shaikh <furquan@google.com>
2021-03-22acpi/acpigen.h: Add more intuitive AML package closing functionsJakub Czapiga
Until now every AML package had to be closed using acpigen_pop_len(). This commit introduces set of package closing functions corresponding with their opening function names. For example acpigen_write_if() opens if-statement package, acpigen_write_if_end() closes it. Now acpigen_write_else() closes previously opened acpigen_write_if(), so acpigen_pop_len() is not required before it. Signed-off-by: Jakub Czapiga <jacz@semihalf.com> Change-Id: Icfdc3804cd93bde049cd11dec98758b3a639eafd Reviewed-on: https://review.coreboot.org/c/coreboot/+/50910 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Lance Zhao Reviewed-by: Angel Pons <th3fanbus@gmail.com>
2021-03-11Documentation/acpi: switch example from edge to level interruptsDmitry Torokhov
Configuring touch controllers to use edge-triggered interrupts is not recommended as it is very easy to lose an edge when kernel drivers disable the interrupt for one reason or another, and recovering from this condition requires workarounds in the kernel. Unfortunately the example setting up a touchpad used edge-triggered interrupts, and this set up has been propagating through the boards. Let's switch the example to use level interrupts instead. Change-Id: I4dc8b91ed070ce117553b00a087ad709aeaf16af Signed-off-by: Dmitry Torokhov <dtor@chromium.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/51398 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Furquan Shaikh <furquan@google.com> Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
2020-05-26Documentation/acpi: Fix the path to variants/hatch/overridetree.cbElyes HAOUAS
Change-Id: I7c3fd942318f28b4714bc7c2a47bedf85f7923ed Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/c/coreboot/+/40012 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Christian Walter <christian.walter@9elements.com> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Angel Pons <th3fanbus@gmail.com>
2020-05-02acpi: Move ACPI table support out of arch/x86 (3/5)Furquan Shaikh
This change moves all ACPI table support in coreboot currently living under arch/x86 into common code to make it architecture independent. ACPI table generation is not really tied to any architecture and hence it makes sense to move this to its own directory. In order to make it easier to review, this change is being split into multiple CLs. This is change 3/5 which basically is generated by running the following command: $ git grep -iIl "arch/acpi" | xargs sed -i 's/arch\/acpi/acpi\/acpi/g' BUG=b:155428745 Change-Id: I16b1c45d954d6440fb9db1d3710063a47b582eae Signed-off-by: Furquan Shaikh <furquan@google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/40938 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>
2020-03-23acpi: Change Processor ACPI Name (Intel only)Christian Walter
The ACPI Spec 2.0 states, that Processor declarations should be made within the ACPI namespace \_SB and not \_PR anymore. \_PR is deprecated and is removed here for Intel CPUs only. Tested on: * X11SSH (Kabylake) * CFL Platform * Asus P8Z77-V LX2 and Windows 10 FWTS does not return FAIL anymore on ACPI tests Tested-by: Angel Pons <th3fanbus@gmail.com> Change-Id: Ib101ed718f90f9056d2ecbc31b13b749ed1fc438 Signed-off-by: Christian Walter <christian.walter@9elements.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/37814 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
2020-03-02arch/x86/acpigen: Add new helper routines for XOR and get_rx_gpioRajat Jain
Add new helper function in the acpigen library, that use the underlying soc routines. Change-Id: I8d65699d3c806007a50adcb51c5d84567ce451b7 Signed-off-by: Rajat Jain <rajatja@google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/39145 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Mathew King <mathewk@chromium.org>
2020-01-09acpi: Be more ACPI compliant when generating _UIDPatrick Rudolph
* 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>
2019-12-09Documentation: Move ACPI documentation in a subindexArthur Heymans
Change-Id: I17c5263674b805a73d98aaa3e7090083905e37ef Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/c/coreboot/+/37242 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
2019-08-29Documentation/acpi: Add new document on adding ACPI devices to devicetreeTim Wawrzynczak
Change-Id: I9636e65f7d2499b06b1d71e5f8d09c528b850027 Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/35080 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-by: Furquan Shaikh <furquan@google.com> Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
2018-04-16Documentation/acpi/gpio.md: Fix formatting of tableJonathan Neuschäfer
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>
2018-04-16Documentation/acpi/gpio.md: Fix markdown heading levelsJonathan Neuschäfer
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>
2017-06-12Documentation: change coreboot to lowercaseMartin Roth
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>
2017-02-22arch/x86/acpigen: Provide helper functions for enabling/disabling GPIOFurquan Shaikh
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)
2016-10-29Documentation: Add documentation for GPIO toggling in ACPI AMLFurquan Shaikh
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>
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