@@ -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 as the "Using PWMs" section.
+
Locking
-------
This patch adds power management descriptions that consumers should implement it. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> --- Documentation/pwm.txt | 7 +++++++ 1 file changed, 7 insertions(+)