linux-kernel - Re: [Letux-kernel] [PATCH] ARM: dts: omap3-gta04: declare backlight in lcd node

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Message-Id: <E556C766-1B1D-4352-9D64-D18B631ADB7D@goldelico.com>
Date:   Mon, 11 Feb 2019 19:14:12 +0100
From:   "H. Nikolaus Schaller" <hns@...delico.com>
To:     Andreas Kemnade <andreas@...nade.info>
Cc:     Benoit Cousson <bcousson@...libre.com>,
        Tony Lindgren <tony@...mide.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        linux-omap <linux-omap@...r.kernel.org>,
        devicetree <devicetree@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Discussions about the Letux Kernel 
        <letux-kernel@...nphoenux.org>
Subject: Re: [Letux-kernel] [PATCH] ARM: dts: omap3-gta04: declare backlight in lcd node

> Am 11.02.2019 um 17:20 schrieb Andreas Kemnade <andreas@...nade.info>:
> 
> The lcd display of the gta04 has a backlight but the backlight
> was not referenced in the lcd node, so screen blanking did
> not turn off the backlight. Fix that.
> 
> Signed-off-by: Andreas Kemnade <andreas@...nade.info>

Works fine.

Tested-by: H. Nikolaus Schaller <hns@...delico.com>

> ---
> the backlight property for the driver was accepted here:
> https://lore.kernel.org/lkml/a54e7427-ff84-d105-aab7-c5eab42e6df9@ti.com/
> 
> arch/arm/boot/dts/omap3-gta04.dtsi | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm/boot/dts/omap3-gta04.dtsi b/arch/arm/boot/dts/omap3-gta04.dtsi
> index 8c55d33ff694..3b88eb5f1a72 100644
> --- a/arch/arm/boot/dts/omap3-gta04.dtsi
> +++ b/arch/arm/boot/dts/omap3-gta04.dtsi
> @@ -142,6 +142,7 @@
> 			spi-cpol;
> 			spi-cpha;
> 
> +			backlight= <&backlight>;
> 			label = "lcd";
> 			port {
> 				lcd_in: endpoint {
> @@ -151,7 +152,7 @@
> 		};
> 	};
> 
> -	backlight {
> +	backlight: backlight {
> 		compatible = "pwm-backlight";
> 		pwms = <&pwm11 0 12000000 0>;
> 		pwm-names = "backlight";
> -- 
> 2.11.0
> 
> _______________________________________________
> http://projects.goldelico.com/p/gta04-kernel/
> Letux-kernel mailing list
> Letux-kernel@...nphoenux.org
> http://lists.goldelico.com/mailman/listinfo.cgi/letux-kernel

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