linux-kernel - [PATCH 3/3] arm64: dts: ti: am65x: Add missing power-supply for Rocktech-rk101 panel

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Message-ID: <20250421214620.3770172-4-afd@ti.com>
Date: Mon, 21 Apr 2025 16:46:20 -0500
From: Andrew Davis <afd@...com>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>, Nishanth Menon <nm@...com>,
        Vignesh
 Raghavendra <vigneshr@...com>,
        Tero Kristo <kristo@...nel.org>, Jan Kiszka
	<jan.kiszka@...mens.com>
CC: <devicetree@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, Andrew Davis <afd@...com>
Subject: [PATCH 3/3] arm64: dts: ti: am65x: Add missing power-supply for Rocktech-rk101 panel

Add the 5v0 supply that is provided over the display panel cable and
used by the LCD. This is required by "simple panels" or we get the
following warning from DTBS_CHECK:

k3-am654-gp-evm.dtb: display0: 'power-supply' is a required property

Signed-off-by: Andrew Davis <afd@...com>
---
 .../ti/k3-am654-base-board-rocktech-rk101-panel.dtso | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am654-base-board-rocktech-rk101-panel.dtso b/arch/arm64/boot/dts/ti/k3-am654-base-board-rocktech-rk101-panel.dtso
index 364c57b3b3a06..7a3953d64fd84 100644
--- a/arch/arm64/boot/dts/ti/k3-am654-base-board-rocktech-rk101-panel.dtso
+++ b/arch/arm64/boot/dts/ti/k3-am654-base-board-rocktech-rk101-panel.dtso
@@ -15,8 +15,20 @@
 #include <dt-bindings/interrupt-controller/irq.h>
 
 &{/} {
+	vcc_5v0: lcd-regulator {
+		/* Output of LM5140 */
+		compatible = "regulator-fixed";
+		regulator-name = "vcc_5v0";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		regulator-always-on;
+		regulator-boot-on;
+		vin-supply = <&evm_12v0>;
+	};
+
 	display0 {
 		compatible = "rocktech,rk101ii01d-ct";
+		power-supply = <&vcc_5v0>;
 		backlight = <&lcd_bl>;
 		enable-gpios = <&pca9555 8 GPIO_ACTIVE_HIGH>;
 		port {
-- 
2.39.2