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Commit 321a7cea authored by Yoshihiro Shimoda's avatar Yoshihiro Shimoda Committed by Thierry Reding
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pwm: Add power management descriptions 



This patch adds power management descriptions that consumers should
implement it.

Signed-off-by: default avatarYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: default avatarSimon Horman <horms+renesas@verge.net.au>
Signed-off-by: default avatarThierry Reding <thierry.reding@gmail.com>
parent 4ae42ce7

Documentation/pwm.txt

+7 −0
Original line number Diff line number Diff line
@@ -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

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