linux-kernel - [PATCH v2 2/9] arm64: dts: st: add ltdc support on stm32mp231

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Message-ID: <20260210-display-v2-2-0592bd514958@foss.st.com>
Date: Tue, 10 Feb 2026 11:03:55 +0100
From: Raphael Gallais-Pou <raphael.gallais-pou@...s.st.com>
To: 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>,
	Christophe Roullier <christophe.roullier@...s.st.com>
CC: Philippe Cornu <philippe.cornu@...s.st.com>, Yannick Fertre
	<yannick.fertre@...s.st.com>, Raphaël Gallais-Pou
	<rgallaispou@...il.com>, <devicetree@...r.kernel.org>,
	<linux-stm32@...md-mailman.stormreply.com>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v2 2/9] arm64: dts: st: add ltdc support on stm32mp231

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/stm32mp231.dtsi | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/arm64/boot/dts/st/stm32mp231.dtsi b/arch/arm64/boot/dts/st/stm32mp231.dtsi
index 88e214d395ab7af53e2707dbc2dfc6b3d000a798..a6840882f512b132b69b917ccbc6cfd4a502a481 100644
--- a/arch/arm64/boot/dts/st/stm32mp231.dtsi
+++ b/arch/arm64/boot/dts/st/stm32mp231.dtsi
@@ -1178,6 +1178,18 @@ exti2: interrupt-controller@...30000 {
 				<&intc GIC_SPI 213 IRQ_TYPE_LEVEL_HIGH>;	/* EXTI_70 */
 		};
 
+		ltdc: display-controller@...10000 {
+			compatible = "st,stm32mp251-ltdc";
+			reg = <0x48010000 0x400>;
+			interrupts = <GIC_SPI 158 IRQ_TYPE_LEVEL_HIGH>,
+				<GIC_SPI 159 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&rcc CK_KER_LTDC>, <&rcc CK_BUS_LTDC>;
+			clock-names = "lcd", "bus";
+			resets = <&rcc LTDC_R>;
+			access-controllers = <&rifsc 80>;
+			status = "disabled";
+		};
+
 		intc: interrupt-controller@...10000 {
 			compatible = "arm,gic-400";
 			reg = <0x4ac10000 0x1000>,

-- 
2.43.0