linux-loongson/arch/arm64/boot/dts/rockchip/rk3588-jaguar-ethernet-switch.dtso

// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
/*
 * Copyright (c) 2025 Cherry Embedded Solutions GmbH
 *
 * Device Tree Overlay for the Ethernet Switch adapter for the Mezzanine
 * connector on RK3588 Jaguar
 * (manual: https://embedded.cherry.de/jaguar-ethernet-switch-user-manual/)
 *
 * This adapter has a KSZ9896 Ethernet Switch with 4 1GbE Ethernet connectors,
 * two user controllable LEDs, and an M12 12-pin connector which exposes the
 * following signals:
 *  - RS232/RS485 (max 250Kbps/500Kbps, RX pin1, TX pin2)
 *  - two digital inputs (pin4 routed to GPIO3_C5 on SoC, pin5 to GPIO4_B4)
 *  - two digital outputs (pin7 routed to GPIO3_D3 on SoC, pin8 to GPIO3_D1)
 *  - two analog inputs (pin10 to channel1 of ADS1015, pin11 to channel2)
 *
 * RK3588 Jaguar can be powered entirely through the adapter via the M8 3-pin
 * connector (12-24V).
 */

/dts-v1/;
/plugin/;

#include <dt-bindings/clock/rockchip,rk3588-cru.h>
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/interrupt-controller/irq.h>
#include <dt-bindings/leds/common.h>
#include <dt-bindings/pinctrl/rockchip.h>

&{/} {
	aliases {
		ethernet1 = "/ethernet@fe1c0000";
	};

	mezzanine-leds {
		compatible = "gpio-leds";
		pinctrl-names = "default";
		pinctrl-0 = <&led_usr1_pin &led_usr2_pin>;

		led-1 {
			gpios = <&gpio1 RK_PC1 GPIO_ACTIVE_HIGH>;
			label = "USR1";
		};

		led-2 {
			gpios = <&gpio3 RK_PC4 GPIO_ACTIVE_HIGH>;
			label = "USR2";
		};
	};
};

&gmac1 {
	clock_in_out = "output";
	phy-mode = "rgmii-id";
	pinctrl-names = "default";
	pinctrl-0 = <&gmac1_rx_bus2
		     &gmac1_tx_bus2
		     &gmac1_rgmii_clk
		     &gmac1_rgmii_bus
		     &eth1_pins>;
	rx_delay = <0x0>;
	tx_delay = <0x0>;
	status = "okay";

	fixed-link {
		speed = <1000>;
		full-duplex;
	};
};

&i2c1 {
	#address-cells = <1>;
	/*
	 * ADS1015 can handle high-speed (HS) mode (up to 3.4MHz) on I2C bus,
	 * but SoC can handle only up to 400kHz.
	 */
	clock-frequency = <400000>;
	#size-cells = <0>;
	status = "okay";

	adc@48 {
		compatible = "ti,ads1015";
		reg = <0x48>;
		#address-cells = <1>;
		interrupt-parent = <&gpio3>;
		interrupts = <RK_PC7 IRQ_TYPE_EDGE_FALLING>;
		pinctrl-0 = <&adc_alert>;
		pinctrl-names = "default";
		#io-channel-cells = <1>;
		#size-cells = <0>;

		channel@1 {
			reg = <5>; /* Single-ended between AIN1 and GND */
			ti,datarate = <0>;
			ti,gain = <5>;
		};

		channel@2 {
			reg = <6>; /* Single-ended between AIN2 and GND */
			ti,datarate = <0>;
			ti,gain = <5>;
		};
	};

	switch@5f {
		compatible = "microchip,ksz9896";
		reg = <0x5f>;
		interrupt-parent = <&gpio3>;
		interrupts = <RK_PB7 IRQ_TYPE_EDGE_FALLING>; /* ETH_INTRP_N */
		pinctrl-0 = <&eth_reset_n &eth_intrp_n>;
		pinctrl-names = "default";
		reset-gpios = <&gpio3 RK_PB6 GPIO_ACTIVE_LOW>; /* ETH_RESET */
		microchip,synclko-disable; /* CLKO_25_125 only routed to TP1 */

		ethernet-ports {
			#address-cells = <1>;
			#size-cells = <0>;

			lan1: port@0 {
				reg = <0>;
				label = "ETH1";
			};

			lan2: port@1 {
				reg = <1>;
				label = "ETH2";
			};

			lan3: port@2 {
				reg = <2>;
				label = "ETH3";
			};

			lan4: port@3 {
				reg = <3>;
				label = "ETH4";
			};

			port@5 {
				reg = <5>;
				ethernet = <&gmac1>;
				label = "CPU";
				phy-mode = "rgmii-id";
				rx-internal-delay-ps = <2000>;
				tx-internal-delay-ps = <2000>;

				fixed-link {
					speed = <1000>;
					full-duplex;
				};
			};
		};
	};
};

&pinctrl {
	adc {
		adc_alert: adc-alert-irq {
			rockchip,pins =
				<3 RK_PC7 RK_FUNC_GPIO &pcfg_pull_up>;
		};
	};

	ethernet {
		eth_intrp_n: eth-intrp-n {
			rockchip,pins =
				<3 RK_PB7 RK_FUNC_GPIO &pcfg_pull_none>;
		};

		eth_reset_n: eth-reset-n {
			rockchip,pins =
				<3 RK_PB6 RK_FUNC_GPIO &pcfg_pull_none>;
		};
	};

	leds {
		led_usr1_pin: led-usr1-pin {
			rockchip,pins =
				<1 RK_PC1 RK_FUNC_GPIO &pcfg_pull_down>;
		};

		led_usr2_pin: led-usr2-pin {
			rockchip,pins =
				<3 RK_PC4 RK_FUNC_GPIO &pcfg_pull_down>;
		};
	};
};

&uart9 {
	/* GPIO3_D0/EN_RS485_MODE for switching between RS232 and RS485 */
	pinctrl-0 = <&uart9m2_xfer &uart9m2_rtsn>;
	pinctrl-names = "default";
	linux,rs485-enabled-at-boot-time;
	status = "okay";
};