Commit e48fe75a authored by Kent Gibson's avatar Kent Gibson Committed by Bartosz Golaszewski
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Documentation: gpio: Reconfiguration with unset direction (uAPI v1) 



Update description of reconfiguration rules, adding requirement that a
direction flag be set or the configuration is considered invalid.

Signed-off-by: default avatarKent Gibson <warthog618@gmail.com>
Link: https://lore.kernel.org/r/20240626052925.174272-4-warthog618@gmail.com


Signed-off-by: default avatarBartosz Golaszewski <bartosz.golaszewski@linaro.org>
parent 3550b5db

Documentation/userspace-api/gpio/gpio-handle-set-config-ioctl.rst

+4 −1
Original line number Diff line number Diff line
@@ -43,7 +43,10 @@ The configuration applies to all requested lines. 


The same :ref:`gpio-get-linehandle-config-rules` and

:ref:`gpio-get-linehandle-config-support` that apply when requesting the

lines also apply when updating the line configuration.

lines also apply when updating the line configuration, with the additional

restriction that a direction flag must be set. Requesting an invalid

configuration, including without a direction flag set, is an error

(**EINVAL**).



The motivating use case for this command is changing direction of

bi-directional lines between input and output, but it may be used more