shields: st_stm32f4dis_cam: add stm32l4r9i_disco specific overlay

Move the selection of the dma channel and the sensor input clock into
a board specific overlay since this differ from a board to another.

Signed-off-by: Alain Volmat <[email protected]>

Author: Alain Volmat

boards/shields/st_stm32f4dis_cam/boards/stm32l4r9i_disco.overlay

@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) 2025 STMicroelectronics
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&dma1 {
+	status = "okay";
+};
+
+&dmamux1 {
+	status = "okay";
+};
+
+&mco1 {
+	clocks = <&rcc STM32_SRC_SYSCLK MCO1_SEL(MCO_SEL_SYSCLK)>;
+	prescaler = <MCO1_PRE(MCO_PRE_DIV_4)>;
+	pinctrl-0 = <&rcc_mco_pa8>;
+	pinctrl-names = "default";
+	status = "okay";
+};

boards/shields/st_stm32f4dis_cam/st_stm32f4dis_cam.overlay

@@ -10,14 +10,6 @@
 	};
 };
 
-&dma2 {
-	status = "okay";
-};
-
-&dmamux1 {
-	status = "okay";
-};
-
 &st_cam_i2c {
 	ov9655: camera@30 {
 		compatible = "ovti,ov9655";
@@ -32,24 +24,9 @@
 	};
 };
 
-#define MCO1_SEL_SYSCLK 1
-
-#define MCO1_PRE_DIV_4 2
-
-&mco1 {
-	status = "okay";
-	clocks = <&rcc STM32_SRC_SYSCLK MCO1_SEL(MCO1_SEL_SYSCLK)>;
-	prescaler = <MCO1_PRE(MCO1_PRE_DIV_4)>;
-	pinctrl-0 = <&rcc_mco_pa8>;
-	pinctrl-names = "default";
-};
-
 &st_cam_dvp {
 	status = "okay";
 
-	/* DMA config is already hardcoded within the DCMI driver */
-	dmas = <&dma2 5 0 0>;
-
 	port {
 		dcmi_ep_in: endpoint {
 			remote-endpoint-label = "ov9655_ep_out";