tree e88017ff289993d4142cf90ea410a2997258b24e
parent 01b2d4536f0215c6d97d77e157afee04300ffc90
author Philip, Avinash <avinashphilip@ti.com> 1343138732 +0530
committer Thierry Reding <thierry.reding@avionic-design.de> 1347289544 +0200

pwm: Add support for configuring the PWM polarity

Some hardware supports inverting the polarity of the PWM signal. This
commit adds support to the PWM framework to allow users of the PWM API
to configure the polarity. Note that in order to reduce complexity,
changing the polarity of a PWM signal is only allowed while the PWM is
disabled.

A practical example where this can prove useful is to simulate inversion
of the duty cycle. While inversion of polarity and duty cycle are not
exactly the same, the differences for most use-cases are negligible.

Signed-off-by: Philip, Avinash <avinashphilip@ti.com>
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>