linux-kernel - Re: [PATCH v6 2/5] dt-bindings: pwm-backlight: add PWM delay proprieties.

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Message-ID: <20180327150827.i7b4urmjrf2mqj3t@rob-hp-laptop>
Date:   Tue, 27 Mar 2018 10:08:27 -0500
From:   Rob Herring <robh@...nel.org>
To:     Enric Balletbo i Serra <enric.balletbo@...labora.com>
Cc:     Lee Jones <lee.jones@...aro.org>,
        Daniel Thompson <daniel.thompson@...aro.org>,
        Jingoo Han <jingoohan1@...il.com>, Pavel Machek <pavel@....cz>,
        Heiko Stuebner <heiko@...ech.de>,
        Thierry Reding <thierry.reding@...il.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Richard Purdie <rpurdie@...ys.net>,
        Jacek Anaszewski <jacek.anaszewski@...il.com>,
        linux-pwm@...r.kernel.org, linux-fbdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, groeck@...omium.org,
        linux-rockchip@...ts.infradead.org, linux-leds@...r.kernel.org,
        devicetree@...r.kernel.org, kernel@...labora.com
Subject: Re: [PATCH v6 2/5] dt-bindings: pwm-backlight: add PWM delay
 proprieties.

On Mon, Mar 26, 2018 at 11:52:10AM +0200, Enric Balletbo i Serra wrote:
> Hardware needs a delay between setting an initial (non-zero) PWM and
> enabling the backlight using GPIO. The post-pwm-on-delay-ms specifies
> this delay in milli seconds. Hardware also needs a delay between disabing
> the backlight using GPIO and setting PWM value to 0. The pwm-off-delay-ms
> is this delay in milli seconds.
> 
> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
> Acked-by: Pavel Machek <pavel@....cz>
> Acked-by: Thierry Reding <thierry.reding@...il.com>
> ---
> Based on the original Huang Lin <hl@...k-chips.com> work.
> Changes since v5:
>  - Add Acked-by: Thierry Reding <thierry.reding@...il.com>
>  - CC DT mainling list (for some reason dropped at some point, my
>    fault)
> Changes since v4:
>  - Rebase on top of mainline.
> Changes since v3:
>  - Replace us for ms.
>  - Add Acked-by: Pavel Machek <pavel@....cz>
> Changes since v2:
>  - Use separate properties (Rob Herring)
> Changes since v1:
>  - As suggested by Daniel Thompson
>    - Do not assume power-on delay and power-off delay will be the same
> ---
>  Documentation/devicetree/bindings/leds/backlight/pwm-backlight.txt | 6 ++++++
>  1 file changed, 6 insertions(+)

Reviewed-by: Rob Herring <robh@...nel.org>