linux-kernel - [PATCH 08/12] arm64: dts: st: add ltdc support on stm32mp251

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Message-ID: <20250725-drm-misc-next-v1-8-a59848e62cf9@foss.st.com>
Date: Fri, 25 Jul 2025 12:04:00 +0200
From: Raphael Gallais-Pou <raphael.gallais-pou@...s.st.com>
To: Yannick Fertre <yannick.fertre@...s.st.com>,
        Philippe Cornu
	<philippe.cornu@...s.st.com>,
        Maarten Lankhorst
	<maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
        Rob Herring <robh@...nel.org>,
        Krzysztof
 Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Maxime
 Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue
	<alexandre.torgue@...s.st.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Christophe Roullier
	<christophe.roullier@...s.st.com>
CC: <dri-devel@...ts.freedesktop.org>, <devicetree@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH 08/12] arm64: dts: st: add ltdc support on stm32mp251

The LCD-TFT Display Controller (LTDC) handles display composition,
scaling and rotation.  It provides a parallel digital RGB flow to be
used by display interfaces.

Add the LTDC node.

Signed-off-by: Raphael Gallais-Pou <raphael.gallais-pou@...s.st.com>
---
 arch/arm64/boot/dts/st/stm32mp251.dtsi | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/arm64/boot/dts/st/stm32mp251.dtsi b/arch/arm64/boot/dts/st/stm32mp251.dtsi
index 8d87865850a7a6e8095c36acdef83c8e3a73ae54..9698170547c13ca17f032dd714dd4d7290a9b0e2 100644
--- a/arch/arm64/boot/dts/st/stm32mp251.dtsi
+++ b/arch/arm64/boot/dts/st/stm32mp251.dtsi
@@ -1052,6 +1052,18 @@ dcmipp: dcmipp@...30000 {
 				status = "disabled";
 			};
 
+			ltdc: display-controller@...10000 {
+				compatible = "st,stm32mp25-ltdc";
+				reg = <0x48010000 0x400>;
+				interrupts = <GIC_SPI 158 IRQ_TYPE_LEVEL_HIGH>,
+					<GIC_SPI 159 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&rcc CK_BUS_LTDC>, <&rcc CK_KER_LTDC>;
+				clock-names = "bus", "lcd";
+				resets = <&rcc LTDC_R>;
+				access-controllers = <&rifsc 80>;
+				status = "disabled";
+			};
+
 			combophy: phy@...c0000 {
 				compatible = "st,stm32mp25-combophy";
 				reg = <0x480c0000 0x1000>;

-- 
2.25.1