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| author | Luis R. Rodriguez <mcgrof@kernel.org> | 2016-12-16 14:10:36 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-01-11 11:42:59 +0300 |
| commit | 113ccc38378b6f0b24c0993040c6044e35163a51 (patch) | |
| tree | 2a1fbd9a1ad5144dc316834ccf52505a84191cb3 /Documentation/driver-api/firmware/fw_search_path.rst | |
| parent | 880444e214cfd293a2e8cc4bd3505f7ffa6ce33a (diff) | |
| download | linux-113ccc38378b6f0b24c0993040c6044e35163a51.tar.xz | |
firmware: revamp firmware documentation
Understanding this code is getting out of control without any
notes. Give the firmware_class driver a much needed documentation love,
and while at it convert it to the new sphinx documentation format.
v2: typos and small fixes
Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/driver-api/firmware/fw_search_path.rst')
| -rw-r--r-- | Documentation/driver-api/firmware/fw_search_path.rst | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/Documentation/driver-api/firmware/fw_search_path.rst b/Documentation/driver-api/firmware/fw_search_path.rst new file mode 100644 index 000000000000..a360f1009fa3 --- /dev/null +++ b/Documentation/driver-api/firmware/fw_search_path.rst @@ -0,0 +1,26 @@ +===================== +Firmware search paths +===================== + +The following search paths are used to look for firmware on your +root filesystem. + +* fw_path_para - module parameter - default is empty so this is ignored +* /lib/firmware/updates/UTS_RELEASE/ +* /lib/firmware/updates/ +* /lib/firmware/UTS_RELEASE/ +* /lib/firmware/ + +The module parameter ''path'' can be passed to the firmware_class module +to activate the first optional custom fw_path_para. The custom path can +only be up to 256 characters long. The kernel parameter passed would be: + +* 'firmware_class.path=$CUSTOMIZED_PATH' + +There is an alternative to customize the path at run time after bootup, you +can use the file: + +* /sys/module/firmware_class/parameters/path + +You would echo into it your custom path and firmware requested will be +searched for there first. |