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2020-05-26docs: acpi: fix old http link and improve document formatFlavio Suligoi1-1/+1
The website: http://wiki.minnowboard.org doesn't exist anymore. The same pages are moved to: https://www.elinux.org/Minnowboard Other improvements concern the introduction of some rst semantic markup in the document. Signed-off-by: Flavio Suligoi <f.suligoi@asem.it> Link: https://lore.kernel.org/r/20200519084128.12756-2-f.suligoi@asem.it Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-02-20Documentation/admin-guide/acpi: fix fan_performance_states.rst warningsRandy Dunlap1-2/+2
Fix Sphinx format warnings in fan_performace_states.rst by adding indentation. Documentation/admin-guide/acpi/fan_performance_states.rst:21: WARNING: Literal block ends without a blank line; unexpected unindent. Documentation/admin-guide/acpi/fan_performance_states.rst:41: WARNING: Literal block expected; none found. Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2019-12-20ACPI: fan: Expose fan performance state informationSrinivas Pandruvada2-0/+63
When _FPS indicates variable speed fan support, the thermal cooling device for fan shows max performance state count as "max_state" (greater than or equal to 1). But the thermal cooling device doesn't expose the properties of each performance state. This is not enough for smart fan control user space software, which also considers speed, power and noise level. This change exposes the properties of the fan performance states in the sysfs directory of the ACPI device representing the fan, that is /sys/bus/acpi/devices/devices/INT3404:00 or /sys/bus/platform/devices/PNP0C0B:00. For example: $ ls /sys/bus/acpi/devices/INT3404\:00 description path state0 state11 state4 state7 status hid physical_node state1 state2 state5 state8 subsystem modalias power state10 state3 state6 state9 uevent uid wakeup where each state* attribute lists the properties of a fan performance state in the following format: control_percent:trip_point:speed_rpm:noise_level_mdb:power_mw $ cat /sys/bus/acpi/devices/INT3404\:00/state10 95:0:11600:47500:4500 as documented in Documentation/admin-guide/acpi/fan_performance_states.rst While at it, return the correct error code from acpi_fan_probe() when acpi_fan_get_fps() or acpi_fan_get_fif() fails. Suggested-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> [ rjw: Subject, changelog, documentation ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2019-04-26Documentation: ACPI: move ssdt-overlays.txt to admin-guide/acpi and convert ↵Changbin Du2-0/+181
to reST This converts the plain text documentation to reStructuredText format and adds it to Sphinx TOC tree. No essential content change. Signed-off-by: Changbin Du <changbin.du@gmail.com> Reviewed-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2019-04-26Documentation: ACPI: move cppc_sysfs.txt to admin-guide/acpi and convert to reSTChangbin Du2-0/+77
This converts the plain text documentation to reStructuredText format and adds it to Sphinx TOC tree. No essential content change. Signed-off-by: Changbin Du <changbin.du@gmail.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2019-04-26Documentation: ACPI: move dsdt-override.txt to admin-guide/acpi and convert ↵Changbin Du2-0/+14
to reST This converts the plain text documentation to reStructuredText format and adds it to Sphinx TOC tree. No essential content change. Signed-off-by: Changbin Du <changbin.du@gmail.com> Reviewed-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2019-04-26Documentation: ACPI: move initrd_table_override.txt to admin-guide/acpi and ↵Changbin Du2-0/+116
convert to reST This converts the plain text documentation to reStructuredText format and adds it to Sphinx TOC tree. No essential content change. Signed-off-by: Changbin Du <changbin.du@gmail.com> Reviewed-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2019-04-26Documentation: add Linux ACPI to Sphinx TOC treeChangbin Du1-0/+10
Add below index.rst files for ACPI subsystem. More docs will be added later. o admin-guide/acpi/index.rst o driver-api/acpi/index.rst o firmware-guide/index.rst Signed-off-by: Changbin Du <changbin.du@gmail.com> Reviewed-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>