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| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2023-09-11 17:44:54 +0200 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2023-10-10 13:35:54 -0600 |
| commit | 3240c37567cccc5f3b08d96bf7ecd3b287da9ec0 (patch) | |
| tree | d38270f3ff237736c18415f9295d499d1dac6a9b /Documentation/driver-api | |
| parent | 02f9998754b05d417b0ebe6334d0ce5b84a31f44 (diff) | |
| download | linux-3240c37567cccc5f3b08d96bf7ecd3b287da9ec0.tar.gz | |
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
39100ceea79f ("pwm: Switch to the atomic API").
Reported-by: Jens Gehrlein <J.Gehrlein@eckelmann.de>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20230911154454.675057-1-u.kleine-koenig@pengutronix.de
Diffstat (limited to 'Documentation/driver-api')
| -rw-r--r-- | Documentation/driver-api/pwm.rst | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/Documentation/driver-api/pwm.rst b/Documentation/driver-api/pwm.rst index 3fdc95f7a1d15..bb264490a87a1 100644 --- a/Documentation/driver-api/pwm.rst +++ b/Documentation/driver-api/pwm.rst @@ -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). |