commit a5264334e5902094b3c0934fdb84aba2ce3cdd54
author Patrice Chotard <patrice.chotard@foss.st.com> Tue Apr 01 15:14:03 2025 +0200
committer Patrice Chotard <patrice.chotard@foss.st.com> Fri Apr 25 16:00:22 2025 +0200
tree ef9b61e3e09337362840223c0406d9a8bc2e2bae
parent d42ee6768e5b4d505c1888c6d995a8e26c79246d

ARM: dts: stm32: convert stm23f7 boards to OF_UPSTREAM

Enable OF_UPSTREAM flag for STM32F7 platforms.

Use upstream device tree for DSI and LTDC nodes,
As now in upstream DT, in panel@0 node, power-supply property is
present, which is a fixed-regulator, add DM_REGULATOR_FIXED flag
for stm32f769-disco boards.

Set also DEFAULT_FDT_FILE in defconfigs and use it in stm32f746-disco.h
to indicate which FDT file to load (All STM32F7 boards are using this
file).

If something is missing, it must be added in upstream device tree
in linux kernel ("px_clk" for DSI by example).

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>

arch/arm/dts/stm32f769-disco-u-boot.dtsi

diff --git a/arch/arm/dts/stm32f769-disco-u-boot.dtsi b/arch/arm/dts/stm32f769-disco-u-boot.dtsi
index 7c99a6e..8413264 100644
--- a/arch/arm/dts/stm32f769-disco-u-boot.dtsi
+++ b/arch/arm/dts/stm32f769-disco-u-boot.dtsi
@@ -23,57 +23,13 @@
 		spi0 = &qspi;
 	};
 
-	panel: panel {
-		compatible = "orisetech,otm8009a";
-		reset-gpios = <&gpioj 15 1>;
-		status = "okay";
-
-		port {
-			panel_in: endpoint {
-				remote-endpoint = <&dsi_out>;
-			};
-		};
-	};
-
-	soc {
-		dsi: dsi@40016c00 {
-			compatible = "st,stm32-dsi";
-			reg = <0x40016c00 0x800>;
-			resets = <&rcc STM32F7_APB2_RESET(DSI)>;
-			clocks = <&rcc 0 STM32F7_APB2_CLOCK(DSI)>,
-				  <&rcc 0 STM32F7_APB2_CLOCK(LTDC)>,
-				  <&clk_hse>;
-			clock-names = "pclk", "px_clk", "ref";
-			bootph-all;
-			status = "okay";
-
-			ports {
-				port@0 {
-					dsi_out: endpoint {
-						remote-endpoint = <&panel_in>;
-					};
-				};
-				port@1 {
-					dsi_in: endpoint {
-						remote-endpoint = <&dp_out>;
-					};
-				};
-			};
-		};
-	};
 };
 
-&ltdc {
-	clocks = <&rcc 0 STM32F7_APB2_CLOCK(LTDC)>;
-	bootph-all;
-
-	ports {
-		port@0 {
-			dp_out: endpoint {
-				remote-endpoint = <&dsi_in>;
-			};
-		};
-	};
+&dsi {
+	clocks = <&rcc 0 STM32F7_APB2_CLOCK(DSI)>,
+		 <&rcc 0 STM32F7_APB2_CLOCK(LTDC)>,
+		 <&clk_hse>;
+	clock-names = "pclk", "px_clk", "ref";
 };
 
 &fmc {
@@ -100,6 +56,12 @@
 	};
 };
 
+&ltdc {
+	bootph-all;
+
+	clocks = <&rcc 0 STM32F7_APB2_CLOCK(LTDC)>;
+};
+
 &pinctrl {
 	ethernet_mii: mii@0 {
 		pins {