boards: nxp: rd_rw612_bga: enable with LCD_PAR_S035 shield

Enable the rd_rw612_bga board with the LCD_PAR_S035 shield. This shield
cannot be connected directly to the board, but the connection can be
made with a set of jumper wires.

Signed-off-by: Daniel DeGrasse <[email protected]>

Author: danieldegrasse

boards/nxp/rd_rw612_bga/rd_rw612_bga.dtsi

@@ -76,6 +76,22 @@
 				<20 0 &hsgpio0 16 0>,	/* D14 */
 				<21 0 &hsgpio0 17 0>;	/* D15 */
 	};
+
+
+	/*
+	 * The pins for this interface are chosen arbitrarily- the RD-RW612
+	 * board does not have the NXP 8080 interface, but can support displays
+	 * using it by connecting signals directly with jumper wires.
+	 */
+	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 &hsgpio0 3 0>,	/* Pin 9, LCD touch INT */
+				<10  0 &hsgpio0 2 0>,	/* Pin 10, LCD backlight control */
+				<11  0 &hsgpio0 4 0>;	/* Pin 11, LCD and touch reset */
+	};
 };
 
 &wwdt {
@@ -231,12 +247,22 @@ zephyr_udc0: &usb_otg {
 	status = "okay";
 };
 
-&lcdic {
+zephyr_mipi_dbi_parallel: &lcdic {
 	status = "okay";
 	pinctrl-0 = <&pinmux_lcdic>;
 	pinctrl-names = "default";
 };
 
+/*
+ * Similar to the flexio connection, these pins are not
+ * broken out in the format required to connect directly to
+ * an NXP 8080 display, but they can be connected with jumper
+ * wires.
+ */
+nxp_8080_touch_panel_i2c: &arduino_i2c {
+	status = "okay";
+};
+
 &mrt0_channel0 {
 	status = "okay";
 };

boards/shields/lcd_par_s035/boards/rd_rw612_bga.overlay

@@ -0,0 +1,95 @@
+/*
+ * Copyright 2024 NXP
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/dt-bindings/mipi_dbi/mipi_dbi.h>
+
+/*
+ * To use this board with this display, perform the following modifications:
+ * - Depopulate resistors R78, R604, R598, R15, R245, R243, R11, R20, R237,
+ *   R235, R431, R447, R420, R459, R485, and R486
+ * - Populate resistors R286, R19, R246, R242, R123, R239, R124, R125, R236,
+ *   R233, and R12
+ * - Remove jumper JP30
+ * - Set jumper JP40 to postion 1-2, JP38 to 1-2, and JP16 to position 2-3
+ */
+
+/*
+ * To connect the display configure SW1 on the display to
+ * ON-ON-OFF (8 bit 8080 mode), and connect the following pins
+ * | Board Pin | Display Pin | Function |
+ * |-----------|-------------|----------|
+ * | HD2.8     | D0          | D[0]     |
+ * | HD2.16    | D1          | D[1]     |
+ * | J5.2      | TE          | TE       |
+ * | J5.4      | D2          | D[2]     |
+ * | J5.1      | D3          | D[3]     |
+ * | J5.6      | RD          | RDX      |
+ * | J5.3      | D4          | D[4]     |
+ * | HD2.7     | D5          | D[5]     |
+ * | HD2.6     | D6          | D[6]     |
+ * | HD2.1     | D7          | D[7]     |
+ * | HD2.2     | WR          | WR       |
+ * | HD8.1     | CS          | CS       |
+ * | HD8.2     | D/C         | DC       |
+ * | J13.8     | GND         | GND      |
+ * | J13.7     | VDD         | 3V3      |
+ * | J5.10     | SCL         | IC2_SCL  |
+ * | J5.9      | SDA         | IC2_SDA  |
+ * | HD2.4     | INT         | INT      |
+ * | HD2.5     | RST         | RESET    |
+ */
+
+/* Expand the LCDIC pinmux to cover all 8080 mode pins */
+&pinmux_lcdic {
+	group0 {
+		pinmux = <IO_MUX_LCD_8080_IO42>,
+			<IO_MUX_LCD_8080_IO43>,
+			<IO_MUX_LCD_8080_IO44>,
+			<IO_MUX_LCD_8080_IO45>,
+			<IO_MUX_LCD_8080_IO46>,
+			<IO_MUX_LCD_8080_IO47>,
+			<IO_MUX_LCD_8080_IO48>,
+			<IO_MUX_LCD_8080_IO49>,
+			<IO_MUX_LCD_8080_IO51>,
+			<IO_MUX_LCD_8080_IO52>,
+			<IO_MUX_LCD_8080_IO53>,
+			<IO_MUX_LCD_8080_IO54>,
+			<IO_MUX_LCD_8080_IO56>,
+			<IO_MUX_LCD_8080_IO57>;
+		slew-rate = "ultra";
+	};
+};
+
+&st7796s {
+	mipi-mode = <MIPI_DBI_MODE_8080_BUS_8_BIT>;
+	/*
+	 * Display supports minimum write cycle time of 66ns. This
+	 * means we can clock the LCDIC module at 30MHz, as
+	 * the minimum write duration will be 2x the module
+	 * clock. Note that this frequency is too fast for reading
+	 * from the display module
+	 */
+	mipi-max-frequency = <30000000>;
+	/*
+	 * Note that this display is *not* buggy- we use rgb-is-inverted
+	 * as a workaround here to get the display to report an inverted
+	 * color format. This is because the "nxp,swap-bytes" setting
+	 * on the LCDIC will apply byte swapping in hardware, so the
+	 * display should report an inverted color format to account
+	 * for this. This results in better performance for applications
+	 * like LVGL, which would otherwise have to swap RGB565 data in
+	 * software
+	 */
+	rgb-is-inverted;
+};
+
+&lcdic {
+	/* Enable byte swapping */
+	nxp,swap-bytes;
+	/* Set pulse width for write active and write inactive to min value */
+	nxp,write-active-cycles = <1>;
+	nxp,write-inactive-cycles = <1>;
+};