Re: [RESEND PATCH v5 2/5] dt-bindings: pwm-backlight: add PWM delay proprieties.

From: Heiko Stuebner <heiko@sntech.de>
To: Lee Jones <lee.jones@linaro.org>
Cc: Enric Balletbo i Serra <enric.balletbo@collabora.com>,
	Daniel Thompson <daniel.thompson@linaro.org>,
	Jingoo Han <jingoohan1@gmail.com>,
	Rob Herring <robh+dt@kernel.org>, Pavel Machek <pavel@ucw.cz>,
	Thierry Reding <thierry.reding@gmail.com>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
	Richard Purdie <rpurdie@rpsys.net>,
	Jacek Anaszewski <jacek.anaszewski@gmail.com>,
	linux-pwm@vger.kernel.org, linux-fbdev@vger.kernel.org,
	linux-kernel@vger.kernel.org, groeck@chromium.org,
	linux-rockchip@lists.infradead.org, kernel@collabora.com
Subject: Re: [RESEND PATCH v5 2/5] dt-bindings: pwm-backlight: add PWM delay proprieties.
Date: Mon, 19 Feb 2018 10:56:04 +0100	[thread overview]
Message-ID: <4692672.MjQUXlf6O3@phil> (raw)
In-Reply-To: <20180219092247.estv4d2v6cbopx6z@dell>

Hi Lee,

Am Montag, 19. Februar 2018, 10:22:47 CET schrieb Lee Jones:
> On Fri, 16 Feb 2018, 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@collabora.com>
> > Acked-by: Pavel Machek <pavel@ucw.cz>
> > ---
> > Based on the original Huang Lin <hl@rock-chips.com> work.
> > 
> > Changes since v4:
> >  - Rebase on top of mainline.
> > Changes since v3:
> >  - Replace us for ms.
> >  - Add Acked-by: Pavel Machek <pavel@ucw.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(+)
> 
> Looks like this still needs an Ack.
> 
> Also, you didn't supply a 0th (cover-letter) patch, so I have no idea
> of patch history or your future intentions.
> 
> Are there build-time dependencies between them or can each patch be
> merged via their respective trees without the fear of merge/build
> failure?

When looking at the patches, there do not seem to be any build-time
dependencies between the patch 1-3 (backlight) and 4+5 devicetree,
so after Rob hopefully has time to look at the binding change, I'd suspect
you take the code changes and I'll take the dts changes.

Heiko