[PATCH 2/2] arm64: dts: amlogic: Add Ogoos AM3

["J. Neuschäfer via B4 Relay" <devnull+j.ne.posteo.net@kernel.org>]

From: "J. Neuschäfer" <j.ne@posteo.net>

The Ugoos AM3 is a small set-top box based on the Amlogic S912 SoC,
with a board design that is very close to the Q20x development boards.
The MMC max-frequency properties are copied from the downstream device
tree.

  https://ugoos.com/ugoos-am3-16g

The following functionality has been tested and is known to work:
 - debug serial port
 - "update" button inside the case
 - USB host mode, on all three ports
 - HDMI video/audio output
 - eMMC, MicroSD, and SDIO WLAN
 - S/PDIF audio output
 - Ethernet
 - Infrared remote control input

The following functionality doesn't seem to work:
 - USB role switching and device mode on the "OTG" port
 - case LED

Signed-off-by: J. Neuschäfer <j.ne@posteo.net>
---
 arch/arm64/boot/dts/amlogic/Makefile               |  1 +
 .../arm64/boot/dts/amlogic/meson-gx-p23x-q20x.dtsi |  2 +-
 .../arm64/boot/dts/amlogic/meson-gxm-ugoos-am3.dts | 95 ++++++++++++++++++++++
 3 files changed, 97 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/amlogic/Makefile b/arch/arm64/boot/dts/amlogic/Makefile
index 2fbda8419c65a3056410ac45ca3ddaceb69ea4f5..bf2bc14528bfa27e8d6ae2730085fc356d6c6dd8 100644
--- a/arch/arm64/boot/dts/amlogic/Makefile
+++ b/arch/arm64/boot/dts/amlogic/Makefile
@@ -76,6 +76,7 @@ dtb-$(CONFIG_ARCH_MESON) += meson-gxm-q200.dtb
 dtb-$(CONFIG_ARCH_MESON) += meson-gxm-q201.dtb
 dtb-$(CONFIG_ARCH_MESON) += meson-gxm-rbox-pro.dtb
 dtb-$(CONFIG_ARCH_MESON) += meson-gxm-s912-libretech-pc.dtb
+dtb-$(CONFIG_ARCH_MESON) += meson-gxm-ugoos-am3.dtb
 dtb-$(CONFIG_ARCH_MESON) += meson-gxm-vega-s96.dtb
 dtb-$(CONFIG_ARCH_MESON) += meson-gxm-wetek-core2.dtb
 dtb-$(CONFIG_ARCH_MESON) += meson-s4-s805x2-aq222.dtb
diff --git a/arch/arm64/boot/dts/amlogic/meson-gx-p23x-q20x.dtsi b/arch/arm64/boot/dts/amlogic/meson-gx-p23x-q20x.dtsi
index 45ccddd1aaf0546632c81a52c8917a923beae883..4223b26f7d0f3aa47e42e9434d24f73b20441981 100644
--- a/arch/arm64/boot/dts/amlogic/meson-gx-p23x-q20x.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-gx-p23x-q20x.dtsi
@@ -97,7 +97,7 @@ sdio_pwrseq: sdio-pwrseq {
 		clock-names = "ext_clock";
 	};
 
-	cvbs-connector {
+	cvbs_connector: cvbs-connector {
 		compatible = "composite-video-connector";
 
 		port {
diff --git a/arch/arm64/boot/dts/amlogic/meson-gxm-ugoos-am3.dts b/arch/arm64/boot/dts/amlogic/meson-gxm-ugoos-am3.dts
new file mode 100644
index 0000000000000000000000000000000000000000..c413736f4096df8727311844de352debd89cdfb9
--- /dev/null
+++ b/arch/arm64/boot/dts/amlogic/meson-gxm-ugoos-am3.dts
@@ -0,0 +1,95 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2025 J. Neuschäfer <j.ne@posteo.net>
+ *
+ * Debug UART (3.3V, 115200 baud) at the corner of the board:
+ *   (4) (3) (2) [1]
+ *   Vcc RXD TXD GND
+ */
+
+/dts-v1/;
+
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/interrupt-controller/amlogic,meson-g12a-gpio-intc.h>
+
+#include "meson-gxm.dtsi"
+#include "meson-gx-p23x-q20x.dtsi"
+
+/ {
+	compatible = "ugoos,am3", "amlogic,s912", "amlogic,meson-gxm";
+	model = "Ugoos AM3";
+
+	adc-keys {
+		compatible = "adc-keys";
+		io-channels = <&saradc 0>;
+		io-channel-names = "buttons";
+		keyup-threshold-microvolt = <1710000>;
+
+		button-function {
+			label = "Update";
+			linux,code = <KEY_VENDOR>;
+			press-threshold-microvolt = <10000>;
+		};
+	};
+};
+
+&cvbs_connector {
+	/* Not used on this board */
+	status = "disabled";
+};
+
+&ethmac {
+	pinctrl-0 = <&eth_pins>;
+	pinctrl-names = "default";
+
+	/* Select external PHY by default */
+	phy-handle = <&external_phy>;
+
+	amlogic,tx-delay-ns = <2>;
+
+	/* External PHY is in RGMII */
+	phy-mode = "rgmii";
+
+	status = "okay";
+};
+
+&external_mdio {
+	external_phy: ethernet-phy@0 {
+		/* Realtek RTL8211F (0x001cc916) */
+		reg = <0>;
+
+		reset-assert-us = <10000>;
+		reset-deassert-us = <80000>;
+		reset-gpios = <&gpio GPIOZ_14 GPIO_ACTIVE_LOW>;
+
+		interrupt-parent = <&gpio_intc>;
+		/* MAC_INTR on GPIOZ_15 */
+		interrupts = <25 IRQ_TYPE_LEVEL_LOW>;
+	};
+};
+
+&i2c_B {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c_b_pins>;
+
+	rtc: rtc@51 {
+		compatible = "haoyu,hym8563";
+		reg = <0x51>;
+		#clock-cells = <0>;
+	};
+};
+
+/* WLAN: Atheros 10k (QCA9377) */
+&sd_emmc_a {
+	max-frequency = <200000000>;
+};
+
+&sdio_pwrseq {
+	reset-gpios = <&gpio GPIOX_6 GPIO_ACTIVE_HIGH>;
+};
+
+/* eMMC */
+&sd_emmc_c {
+	max-frequency = <100000000>;
+};

-- 
2.48.0.rc1.219.gb6b6757d772