linux-kernel - Re: [PATCH 4/4] ARM: dts: qcom: msm8974-hammerhead: Hook up backlight

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Date: Tue, 20 Feb 2024 17:07:38 +0000
From: Daniel Thompson <daniel.thompson@...aro.org>
To: Luca Weiss <luca@...tu.xyz>
Cc: ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org,
	Lee Jones <lee@...nel.org>, Jingoo Han <jingoohan1@...il.com>,
	Helge Deller <deller@....de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"G.Shark Jeong" <gshark.jeong@...il.com>,
	Bjorn Andersson <andersson@...nel.org>,
	Konrad Dybcio <konrad.dybcio@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Maximilian Weigand <mweigand@...igand.net>,
	dri-devel@...ts.freedesktop.org, linux-fbdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCH 4/4] ARM: dts: qcom: msm8974-hammerhead: Hook up backlight

On Tue, Feb 20, 2024 at 05:45:32PM +0100, Luca Weiss wrote:
> On Dienstag, 20. Februar 2024 15:12:10 CET Daniel Thompson wrote:
> > On Tue, Feb 20, 2024 at 12:11:22AM +0100, Luca Weiss wrote:
> > > Connect the panel with the backlight nodes so that the backlight can be
> > > turned off when the display is blanked.
> > >
> > > Signed-off-by: Luca Weiss <luca@...tu.xyz>
> >
> > Reviewed-by: Daniel Thompson <daniel.thompson@...aro.org>
> >
> >
> > > ---
> > >  arch/arm/boot/dts/qcom/qcom-msm8974-lge-nexus5-hammerhead.dts | 4 +++-
> > >  1 file changed, 3 insertions(+), 1 deletion(-)
> > >
> > > diff --git a/arch/arm/boot/dts/qcom/qcom-msm8974-lge-nexus5-hammerhead.dts b/arch/arm/boot/dts/qcom/qcom-msm8974-lge-nexus5-hammerhead.dts
> > > index 4aaae8537a3f..8eaa5b162815 100644
> > > --- a/arch/arm/boot/dts/qcom/qcom-msm8974-lge-nexus5-hammerhead.dts
> > > +++ b/arch/arm/boot/dts/qcom/qcom-msm8974-lge-nexus5-hammerhead.dts
> > > @@ -182,7 +182,7 @@ &blsp2_i2c5 {
> > >  	status = "okay";
> > >  	clock-frequency = <355000>;
> > >
> > > -	led-controller@38 {
> > > +	backlight: led-controller@38 {
> >
> > Again... a minor nit regarding existing problems but this node doesn't
> > follow the generic naming recommendations:
> > https://devicetree-specification.readthedocs.io/en/stable/devicetree-basics.html#generic-names-recommendation
>
> "led-controller" is listed on that page, or do you mean something else?

That's the point ;-). It is supposed to be called backlight@38!


Daniel.