tree 1dce30676a1f56fe745e0de88b3495c595be8693
parent def1f0e2d593b75a850da0e6915ac2fb0f890829
author Henrik Brix Andersen <hebad@vestas.com> 1573652797 +0100
committer Carles Cufí <carles.cufi@nordicsemi.no> 1578417198 +0100

drivers: pwm: add support for inverted PWM signals

Add support for requesting an inverted PWM pulse (active-low) when
setting up the period and pulse width of a PWM pin. This is useful
when driving external, active-low circuitry (e.g. an LED) with a PWM
signal.

All in-tree PWM drivers is updated to match the new API signature, but
no driver support for inverted PWM signals is added yet.

All in-tree PWM consumers are updated to pass a flags value of 0
(0 meaning default, which is normal PWM polarity).

Fixes #21384.

Signed-off-by: Henrik Brix Andersen <hebad@vestas.com>