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| author | Leonard Crestez <leonard.crestez@nxp.com> | 2019-11-19 19:38:56 +0300 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2019-11-19 23:16:53 +0300 |
| commit | 83ededdb72ca125ddb9a6270b966ef0c26b5cf5a (patch) | |
| tree | c7a145399f27885d59f3247f2bc44c11fed6832a /Documentation/driver-api | |
| parent | 291084904eb0d0e9dd15d7204b62bf809ea800ea (diff) | |
| download | linux-83ededdb72ca125ddb9a6270b966ef0c26b5cf5a.tar.xz | |
docs: Add initial documentation for devfreq
The devfreq subsystem has plenty of kernel-doc comments but they're not
currently included in sphinx documentation.
Add a minimal devfreq.rst file which mostly just includes kernel-doc
comments from devfreq source. This also exposes a number of kernel-doc
warnings on `make htmldocs`
Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Link: https://lore.kernel.org/r/e32fa9de8a60060a6ee5fc42f163111034f9a550.1574181341.git.leonard.crestez@nxp.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to 'Documentation/driver-api')
| -rw-r--r-- | Documentation/driver-api/devfreq.rst | 30 | ||||
| -rw-r--r-- | Documentation/driver-api/index.rst | 1 |
2 files changed, 31 insertions, 0 deletions
diff --git a/Documentation/driver-api/devfreq.rst b/Documentation/driver-api/devfreq.rst new file mode 100644 index 000000000000..4a0bf87a3b13 --- /dev/null +++ b/Documentation/driver-api/devfreq.rst @@ -0,0 +1,30 @@ +.. SPDX-License-Identifier: GPL-2.0 + +======================== +Device Frequency Scaling +======================== + +Introduction +------------ + +This framework provides a standard kernel interface for Dynamic Voltage and +Frequency Switching on arbitrary devices. + +It exposes controls for adjusting frequency through sysfs files which are +similar to the cpufreq subsystem. + +Devices for which current usage can be measured can have their frequency +automatically adjusted by governors. + +API +--- + +Device drivers need to initialize a :c:type:`devfreq_profile` and call the +:c:func:`devfreq_add_device` function to create a :c:type:`devfreq` instance. + +.. kernel-doc:: include/linux/devfreq.h +.. kernel-doc:: include/linux/devfreq-event.h +.. kernel-doc:: drivers/devfreq/devfreq.c + :export: +.. kernel-doc:: drivers/devfreq/devfreq-event.c + :export: diff --git a/Documentation/driver-api/index.rst b/Documentation/driver-api/index.rst index 46d6a165b5a5..e66ebf5bfc89 100644 --- a/Documentation/driver-api/index.rst +++ b/Documentation/driver-api/index.rst @@ -39,6 +39,7 @@ available subsections can be seen below. ipmb i3c/index interconnect + devfreq hsi edac scsi |