From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jon Hunter Subject: [PATCH 4/4] ARM64: tegra: Populate LP8557 backlight regulator Date: Mon, 24 Feb 2020 14:34:36 +0000 Message-ID: <20200224143436.5438-4-jonathanh@nvidia.com> References: <20200224143436.5438-1-jonathanh@nvidia.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <20200224143436.5438-1-jonathanh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> Sender: linux-tegra-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Thierry Reding Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Jon Hunter List-Id: linux-tegra@vger.kernel.org The following warning is observed on Jetson TX1 platform because the supply regulator is not specified for the backlight. WARNING KERN lp855x 0-002c: 0-002c supply power not found, using dummy regulator The backlight supply is provided by the 3.3V SYS rail and so add this as the supply for the backlight. Signed-off-by: Jon Hunter --- arch/arm64/boot/dts/nvidia/tegra210-p2371-2180.dts | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/boot/dts/nvidia/tegra210-p2371-2180.dts b/arch/arm64/boot/dts/nvidia/tegra210-p2371-2180.dts index c70a610f8e3a..ea0e1efa6973 100644 --- a/arch/arm64/boot/dts/nvidia/tegra210-p2371-2180.dts +++ b/arch/arm64/boot/dts/nvidia/tegra210-p2371-2180.dts @@ -56,6 +56,7 @@ backlight: backlight@2c { compatible = "ti,lp8557"; reg = <0x2c>; + power-supply = <&vdd_3v3_sys>; dev-ctrl = /bits/ 8 <0x80>; init-brt = /bits/ 8 <0xff>; -- 2.17.1