ARM: dts: am335x: Add Seeed Studio BeagleBone HDMI cape overlay

Add devicetree overlay for the Seeed Studio BeagleBone HDMI cape, which
provides HDMI output via an ITE IT66121 HDMI bridge and audio support
through McASP.

The cape is designed for BeagleBone Green but is also compatible with
BeagleBone and BeagleBone Black due to pin compatibility.

Link: https://www.seeedstudio.com/Seeed-Studio-BeagleBoner-Green-HDMI-Cape.html
Signed-off-by: Kory Maincent (TI) <kory.maincent@bootlin.com>
Signed-off-by: Kevin Hilman (TI) <khilman@baylibre.com>

2 files changed, 162 insertions, 0 deletions

diff --git a/arch/arm/boot/dts/ti/omap/Makefile b/arch/arm/boot/dts/ti/omap/Makefile
index 4c577214f512..3a4d9204339b 100644
--- a/arch/arm/boot/dts/ti/omap/Makefile
+++ b/arch/arm/boot/dts/ti/omap/Makefile
@@ -84,6 +84,10 @@ dtb-$(CONFIG_ARCH_OMAP4) += \
 	omap4-samsung-espresso10.dtb \
 	omap4-xyboard-mz609.dtb \
 	omap4-xyboard-mz617.dtb
+
+am335x-bonegreen-hdmi-00a0-dtbs := am335x-bonegreen-eco.dtb \
+	am335x-bone-hdmi-00a0.dtbo
+
 dtb-$(CONFIG_SOC_AM33XX) += \
 	am335x-baltos-ir2110.dtb \
 	am335x-baltos-ir3220.dtb \
@@ -95,6 +99,7 @@ dtb-$(CONFIG_SOC_AM33XX) += \
 	am335x-bonegreen.dtb \
 	am335x-bonegreen-wireless.dtb \
 	am335x-bonegreen-eco.dtb \
+	am335x-bonegreen-hdmi-00a0.dtb \
 	am335x-chiliboard.dtb \
 	am335x-cm-t335.dtb \
 	am335x-evm.dtb \
diff --git a/arch/arm/boot/dts/ti/omap/am335x-bone-hdmi-00a0.dtso b/arch/arm/boot/dts/ti/omap/am335x-bone-hdmi-00a0.dtso
new file mode 100644
index 000000000000..f43f44c79c96
--- /dev/null
+++ b/arch/arm/boot/dts/ti/omap/am335x-bone-hdmi-00a0.dtso
@@ -0,0 +1,157 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * 2017 Copyright (c) Seeed Technology Inc.  All right reserved.
+ * Author: Baozhu Zuo <zuobaozhu@gmail.com>
+ * Copyright (c) Bootlin 2026
+ *
+ * This device tree overlay is compatible with the BeagleBone Black, Green
+ * and their subversions.
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/pinctrl/am33xx.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+
+&{/} {
+	hdmi0: connector-hdmi {
+		compatible = "hdmi-connector";
+		label = "hdmi";
+		type = "a";
+		port {
+			hdmi_connector_in: endpoint {
+				remote-endpoint = <&it66121_out>;
+			};
+		};
+	};
+
+	clk_mcasp0_fixed: clk-mcasp0-fixed {
+		#clock-cells = <0>;
+		compatible = "fixed-clock";
+		clock-frequency = <24576000>;
+	};
+
+	clk_mcasp0: clk-mcasp0 {
+		#clock-cells = <0>;
+		compatible = "gpio-gate-clock";
+		clocks = <&clk_mcasp0_fixed>;
+		enable-gpios = <&gpio1 27 0>;
+	};
+
+	sound {
+		compatible = "simple-audio-card";
+		simple-audio-card,name = "TI BeagleBone Green HDMI cape";
+		simple-audio-card,format = "i2s";
+		simple-audio-card,bitclock-master = <&sound_master>;
+		simple-audio-card,frame-master = <&sound_master>;
+
+		sound_master: simple-audio-card,cpu {
+			sound-dai = <&mcasp0>;
+			clocks = <&clk_mcasp0>;
+		};
+
+		simple-audio-card,codec {
+			sound-dai = <&it66121>;
+		};
+	};
+};
+
+&am33xx_pinmux {
+	bb_lcd_pins: pinmux-bb-lcd-pins {
+		pinctrl-single,pins = <
+			AM33XX_PADCONF(AM335X_PIN_LCD_DATA0, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_DATA1, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_DATA2, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_DATA3, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_DATA4, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_DATA5, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_DATA6, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_DATA7, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_DATA8, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_DATA9, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_DATA10, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_DATA11, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_DATA12, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_DATA13, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_DATA14, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_DATA15, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_VSYNC, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_HSYNC, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_PCLK, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_LCD_AC_BIAS_EN, PIN_OUTPUT, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_GPMC_ADVN_ALE, PIN_OUTPUT_PULLDOWN, MUX_MODE7)
+			AM33XX_PADCONF(AM335X_PIN_GPMC_OEN_REN, PIN_OUTPUT_PULLDOWN, MUX_MODE7)
+			AM33XX_PADCONF(AM335X_PIN_GPMC_WEN, PIN_INPUT, MUX_MODE7)
+		>;
+	};
+	mcasp0_pins: mcasp0-pins {
+		pinctrl-single,pins = <
+			AM33XX_PADCONF(AM335X_PIN_MCASP0_AHCLKX, PIN_INPUT_PULLUP, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_MCASP0_AHCLKR, PIN_OUTPUT_PULLDOWN, MUX_MODE2)
+			AM33XX_PADCONF(AM335X_PIN_MCASP0_FSX, PIN_OUTPUT_PULLUP, MUX_MODE0)
+			AM33XX_PADCONF(AM335X_PIN_MCASP0_ACLKX, PIN_OUTPUT_PULLDOWN, MUX_MODE0)
+		>;
+	};
+};
+
+&i2c2 {
+	status = "okay";
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	it66121: it66121 {
+		compatible = "ite,it66121";
+		reg = <0x4d>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&bb_lcd_pins>;
+
+		#sound-dai-cells = <0>;
+
+		interrupt-parent = <&gpio2>;
+		interrupts = <4 IRQ_TYPE_EDGE_RISING>;
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+				it66121_in: endpoint {
+					bus-width = <24>;
+					remote-endpoint = <&lcdc_0>;
+				};
+			};
+
+			port@1 {
+				reg = <1>;
+				it66121_out: endpoint {
+					remote-endpoint = <&hdmi_connector_in>;
+				};
+			};
+		};
+	};
+};
+
+&lcdc {
+	status = "okay";
+	blue-and-red-wiring = "straight";
+	port {
+		lcdc_0: endpoint@0 {
+			remote-endpoint = <&it66121_in>;
+		};
+	};
+};
+
+
+&mcasp0 {
+	status = "okay";
+	#sound-dai-cells = <0>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&mcasp0_pins>;
+	op-mode = <0>;
+	tdm-slots = <2>;
+	serial-dir = < 0 0 1 0 >;
+	tx-num-evt = <32>;
+	rx-num-evt = <32>;
+};
+