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Diffstat (limited to 'Documentation/pwm.txt')
| -rw-r--r-- | Documentation/pwm.txt | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/pwm.txt b/Documentation/pwm.txt index 8fbf0aa3ba2d..ab62f1bb0366 100644 --- a/Documentation/pwm.txt +++ b/Documentation/pwm.txt @@ -65,6 +65,10 @@ period). struct pwm_args contains 2 fields (period and polarity) and should be used to set the initial PWM config (usually done in the probe function of the PWM user). PWM arguments are retrieved with pwm_get_args(). +All consumers should really be reconfiguring the PWM upon resume as +appropriate. This is the only way to ensure that everything is resumed in +the proper order. + Using PWMs with the sysfs interface ----------------------------------- @@ -141,6 +145,9 @@ The implementation of ->get_state() (a method used to retrieve initial PWM state) is also encouraged for the same reason: letting the PWM user know about the current PWM state would allow him to avoid glitches. +Drivers should not implement any power management. In other words, +consumers should implement it as described in the "Using PWMs" section. + Locking ------- |