boards: nxp: frdm_mcnx947: add support for SMARTDMA camera engine

Add support for SMARTDMA camera engine, and a OV7670 parallel camera definition for the frdm_mcnx947 board. This support has been tested with the video capture sample. Signed-off-by: Daniel DeGrasse <[email protected]>
zephyrproject-rtos · Jun 3, 2024 · df9aa23 · df9aa23
1 parent ab2098f
commit df9aa23
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diff --git a/boards/nxp/frdm_mcxn947/board.c b/boards/nxp/frdm_mcxn947/board.c
@@ -213,6 +213,19 @@ static int frdm_mcxn947_init(void)
 	CLOCK_AttachClk(kFRO_HF_to_USDHC);
 #endif
 
+#if DT_NODE_HAS_STATUS(DT_NODELABEL(smartdma), okay)
+	CLOCK_EnableClock(kCLOCK_Smartdma);
+	RESET_PeripheralReset(kSMART_DMA_RST_SHIFT_RSTn);
+#if DT_NODE_HAS_STATUS(DT_NODELABEL(video_sdma), okay)
+	/* Drive CLKOUT from PLL0, divided by 27 to yield ~5.5MHz clock
+	 * The camera will use this clock signal to generate
+	 * PCLK, HSYNC, and VSYNC
+	 */
+	SYSCON->CLKOUTSEL = 0x1;
+	SYSCON->CLKOUTDIV = 26;
+#endif
+#endif
+
 #if CONFIG_FLASH_MCUX_FLEXSPI_NOR
 	/* We downclock the FlexSPI to 50MHz, it will be set to the
 	 * optimum speed supported by the Flash device during FLEXSPI

diff --git a/boards/nxp/frdm_mcxn947/frdm_mcxn947-pinctrl.dtsi b/boards/nxp/frdm_mcxn947/frdm_mcxn947-pinctrl.dtsi
@@ -141,6 +141,31 @@
 		};
 	};
 
+	pinmux_smartdma_camera: pinmux_smartdma_camera {
+		group0 {
+			/*
+			 * SmartDMA pinmux is not defined by SOC header, so
+			 * we encode it manually
+			 */
+			pinmux = <N9X_MUX('1',4,7)>,
+				<N9X_MUX('1',5,7)>,
+				<N9X_MUX('1',6,7)>,
+				<N9X_MUX('1',7,7)>,
+				<N9X_MUX('3',4,7)>,
+				<N9X_MUX('3',5,7)>,
+				<N9X_MUX('1',10,7)>,
+				<N9X_MUX('1',11,7)>,
+				<PIO0_4>,
+				<PIO0_5>,
+				<PIO0_11>,
+				<CLKOUT_PIO2_2>,
+				<CLKOUT_PIO0_6>;
+			drive-strength = "low";
+			slew-rate = "fast";
+			input-enable;
+		};
+	};
+
 	pinmux_usdhc0: pinmux_usdhc0 {
 		group0 {
 			pinmux = <SDHC0_CMD_PIO2_5>,

diff --git a/boards/nxp/frdm_mcxn947/frdm_mcxn947.dtsi b/boards/nxp/frdm_mcxn947/frdm_mcxn947.dtsi
@@ -81,6 +81,28 @@
 	pinctrl-0 = <&pinmux_flexcomm7_lpi2c>;
 	pinctrl-names = "default";
 	clock-frequency = <I2C_BITRATE_STANDARD>;
+	ov7670: ov7670@21 {
+		compatible = "ovti,ov7670";
+		reset-gpios = <&gpio1 19 GPIO_ACTIVE_HIGH>;
+		pwdn-gpios = <&gpio1 18 GPIO_ACTIVE_HIGH>;
+		reg = <0x21>;
+	};
+};
+
+/* SmartDMA is used for video driver on this board */
+&smartdma {
+	status = "okay";
+	program-mem = <0x4000000>;
+	video_sdma: video-sdma {
+		status = "okay";
+		compatible = "nxp,video-smartdma";
+		pinctrl-0 = <&pinmux_smartdma_camera>;
+		pinctrl-names = "default";
+		sensor = <&ov7670>;
+		vsync-pin = <4>;
+		hsync-pin = <11>;
+		pclk-pin = <5>;
+	};
 };
 
 /*