From: Raphael Gallais-Pou <raphael.gallais-pou@foss.st.com>
Date: Fri, 22 Aug 2025 14:34:18 +0000 (+0200)
Subject: arm64: dts: st: add ltdc support on stm32mp251
X-Git-Tag: v6.18-rc1~147^2~18^2~11
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=114e282d51ea87dab368397d525be96e57d084ff;p=thirdparty%2Fkernel%2Flinux.git

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@foss.st.com>
Acked-by: Yannick Fertre <yannick.fertre@foss.st.com>
Link: https://lore.kernel.org/r/20250822-drm-misc-next-v5-9-9c825e28f733@foss.st.com
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>
---

diff --git a/arch/arm64/boot/dts/st/stm32mp251.dtsi b/arch/arm64/boot/dts/st/stm32mp251.dtsi
index 605b6a5d39a61..aecbdea07385f 100644
--- a/arch/arm64/boot/dts/st/stm32mp251.dtsi
+++ b/arch/arm64/boot/dts/st/stm32mp251.dtsi
@@ -1562,6 +1562,18 @@
 				};
 			};
 
+			ltdc: display-controller@48010000 {
+				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";
+			};
+
 			csi: csi@48020000 {
 				compatible = "st,stm32mp25-csi";
 				reg = <0x48020000 0x2000>;