summaryrefslogtreecommitdiff
path: root/Documentation/acpi/devicetree.md
AgeCommit message (Collapse)Author
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>
2021-03-11Documentation/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>
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>