Commit 8151b37b authored by Uwe Kleine-König's avatar Uwe Kleine-König Committed by Thierry Reding
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pwm: Adapt sysfs API documentation to reality 



Most low-level PWM drivers support duty_cycle == period, and so does the
sysfs API. Also polarity can be changed for enabled PWMs since commit
39100cee ("pwm: Switch to the atomic API").

Reported-by: default avatarJens Gehrlein <J.Gehrlein@eckelmann.de>
Link: https://lore.kernel.org/r/20230911154454.675057-1-u.kleine-koenig@pengutronix.de


Signed-off-by: default avatarUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: default avatarThierry Reding <thierry.reding@gmail.com>
parent 4aff152d

Documentation/driver-api/pwm.rst

+3 −3
Original line number Diff line number Diff line
@@ -111,13 +111,13 @@ channel that was exported. The following properties will then be available: 


  duty_cycle

    The active time of the PWM signal (read/write).

    Value is in nanoseconds and must be less than the period.

    Value is in nanoseconds and must be less than or equal to the period.



  polarity

    Changes the polarity of the PWM signal (read/write).

    Writes to this property only work if the PWM chip supports changing

    the polarity. The polarity can only be changed if the PWM is not

    enabled. Value is the string "normal" or "inversed".

    the polarity.

    Value is the string "normal" or "inversed".



  enable

    Enable/disable the PWM signal (read/write).