linux-kernel - Re: [PATCH] pwm-regulator: Add support for a fixed delay after duty cycle changes

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Message-ID: <CABxcv=mi1878Pany74bEk4AY7i4eCA9FqRrw+cnEjSjX4h9xnw@mail.gmail.com>
Date:   Fri, 26 Aug 2016 19:59:44 -0400
From:   Javier Martinez Canillas <javier@...hile0.org>
To:     Matthias Kaehlcke <mka@...omium.org>
Cc:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Doug Anderson <dianders@...omium.org>,
        Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] pwm-regulator: Add support for a fixed delay after duty
 cycle changes

Hello Matthias,

On Fri, Aug 26, 2016 at 7:13 PM, Matthias Kaehlcke <mka@...omium.org> wrote:
> A change of the duty cycle doesn't necessarily cause an inmediate switch
> to the target voltage. The voltage change may be gradual and complete
> with a certain delay. This change introduces the device tree properties
> "settle-time-up-us" and "settle-time-down-us", which allow to specify a
> fixed delay after a voltage increase or decrease. Often it is not
> strictly necessary for a voltage decrease to complete, therefore the
> delays may be asymmetric for voltage. For regulators with a ramp delay
> the corresponding settle time is added to the ramp delay.
>
> Change-Id: Ib3543a250e1dfc14964ec72bd2684237728a08a3

You should remove this tag before posting since is not suitable for mainline.

> Signed-off-by: Matthias Kaehlcke <mka@...omium.org>
> ---

Best regards,
Javier