boards: nxp: frdm_mcxa156: Support flexio for NXP frdm_mcxa156 board

Support flexio for NXP frdm_mcxa156 board.

Signed-off-by: Neil Chen <[email protected]>

Author: NeilChen93

boards/nxp/frdm_mcxa156/board.c

@@ -155,6 +155,11 @@ static int frdm_mcxa156_init(void)
 	CLOCK_AttachClk(kFRO_HF_DIV_to_FLEXCAN0);
 #endif
 
+#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(flexio0))
+	CLOCK_SetClockDiv(kCLOCK_DivFLEXIO0, 1u);
+	CLOCK_AttachClk(kFRO_HF_to_FLEXIO0);
+#endif
+
 #if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(lpadc0))
 	CLOCK_SetClockDiv(kCLOCK_DivADC0, 1u);
 	CLOCK_AttachClk(kFRO12M_to_ADC0);

boards/nxp/frdm_mcxa156/doc/index.rst

@@ -64,6 +64,11 @@ The FRDM-MCXA156 board configuration supports the following hardware features:
 +-----------+------------+-------------------------------------+
 | FLEXCAN   | on-chip    | CAN                                 |
 +-----------+------------+-------------------------------------+
+| FLEXIO    | on-chip    | flexio                              |
++-----------+------------+-------------------------------------+
+| DISPLAY   | on-chip    | flexio; MIPI-DBI. Tested with       |
+|           |            | :ref:`lcd_par_s035`                 |
++-----------+------------+-------------------------------------+
 | I2C       | on-chip    | i2c                                 |
 +-----------+------------+-------------------------------------+
 | LPCMP     | on-chip    | sensor(comparator)                  |

boards/nxp/frdm_mcxa156/frdm_mcxa156-pinctrl.dtsi

@@ -32,6 +32,46 @@
 			input-enable;
 		};
 	};
+	pinmux_flexio_lcd: pinmux_flexio_lcd {
+		group0 {
+			pinmux = <FLEXIO0_D0_P0_16>,
+				<FLEXIO0_D1_P0_17>,
+				<FLEXIO0_D2_P0_18>,
+				<FLEXIO0_D3_P0_19>,
+				<FLEXIO0_D4_P0_20>,
+				<FLEXIO0_D5_P0_21>,
+				<FLEXIO0_D6_P0_22>,
+				<FLEXIO0_D7_P0_23>,
+				<FLEXIO0_D8_P2_0>,
+				<FLEXIO0_D9_P2_1>,
+				<FLEXIO0_D10_P4_2>,
+				<FLEXIO0_D11_P4_3>,
+				<FLEXIO0_D12_P4_4>,
+				<FLEXIO0_D13_P4_5>,
+				<FLEXIO0_D14_P4_6>,
+				<FLEXIO0_D15_P4_7>,
+				<P2_17>,
+				<P2_19>,
+				<P3_0>;
+			slew-rate = "fast";
+			drive-strength = "low";
+			input-enable;
+		};
+		group1 {
+			pinmux = <FLEXIO0_D28_P2_20>;
+			slew-rate = "fast";
+			drive-strength = "low";
+			input-enable;
+			bias-pull-up;
+		};
+		group2 {
+			pinmux = <FLEXIO0_D31_P2_23>;
+			slew-rate = "slow";
+			drive-strength = "low";
+			input-enable;
+			bias-pull-up;
+		};
+	};
 	pinmux_flexpwm0_pwm0: pinmux_flexpwm0_pwm0 {
 		group0 {
 			pinmux = <PWM0_A0_P3_6>,

boards/nxp/frdm_mcxa156/frdm_mcxa156.dts

@@ -66,6 +66,18 @@
 		};
 	};
 
+	/*
+	 * This node describes the GPIO pins of the LCD-PAR-S035 panel 8080 interface.
+	 */
+	nxp_lcd_8080_connector: lcd-8080-connector {
+		compatible = "nxp,lcd-8080";
+		#gpio-cells = <2>;
+		gpio-map-mask = <0xffffffff 0xffffffc0>;
+		gpio-map-pass-thru = <0 0x3f>;
+		gpio-map =	<9  0 &gpio2 15 0>,	/* Pin 9, LCD touch INT */
+				<10  0 &gpio3 22 0>,	/* Pin 10, LCD backlight control */
+				<11  0 &gpio3 0 0>;	/* Pin 11, LCD and touch reset */
+	};
 };
 
 &gpio0 {
@@ -115,6 +127,31 @@
 	pinctrl-names = "default";
 };
 
+&flexio0 {
+	status = "okay";
+};
+
+nxp_8080_touch_panel_i2c: &lpi2c2 {
+	pinctrl-0 = <&pinmux_lpi2c2>;
+	pinctrl-names = "default";
+};
+
+zephyr_mipi_dbi_parallel: &flexio0_lcd {
+	/* DMA channels 0, muxed to FlexIO TX */
+	dmas = <&edma0 0 71>;
+	dma-names = "tx";
+	shifters-count = <4>;
+	timers-count = <1>;
+	enwr-pin = <31>;
+	rd-pin = <28>;
+	data-pin-start = <0>;
+	reset-gpios = <&gpio3 0 GPIO_ACTIVE_HIGH>;
+	cs-gpios = <&gpio2 19 GPIO_ACTIVE_HIGH>;
+	rs-gpios = <&gpio2 17 GPIO_ACTIVE_HIGH>;
+	pinctrl-0 = <&pinmux_flexio_lcd>;
+	pinctrl-names = "default";
+};
+
 &flexpwm0_pwm0 {
 	status = "okay";
 	pinctrl-0 = <&pinmux_flexpwm0_pwm0>;