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diff --git a/arch/arm64/boot/dts/mediatek/mt7988a-bananapi-bpi-r4-pro.dtsi b/arch/arm64/boot/dts/mediatek/mt7988a-bananapi-bpi-r4-pro.dtsi
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@@ -0,0 +1,534 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/*
+ * Copyright (C) 2025 MediaTek Inc.
+ * Author: Sam.Shih <sam.shih@mediatek.com>
+ * Author: Frank Wunderlich <frank-w@public-files.de>
+ */
+
+/dts-v1/;
+
+#include "mt7988a.dtsi"
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/leds/common.h>
+#include <dt-bindings/regulator/richtek,rt5190a-regulator.h>
+
+/ {
+ aliases {
+ ethernet0 = &gmac0;
+ i2c0 = &i2c0;
+ i2c1 = &i2c1;
+ i2c2 = &i2c2;
+ /* PCA9548 (0-0070) provides 4 i2c channels */
+ i2c3 = &imux0;
+ i2c4 = &imux1_sfp1;
+ i2c5 = &imux2_sfp2;
+ i2c6 = &imux3_wifi;
+ };
+
+ chosen {
+ stdout-path = &serial0;
+ };
+
+ fan: pwm-fan {
+ compatible = "pwm-fan";
+ /* cooling level (0, 1, 2, 3) : (0% duty, 30% duty, 50% duty, 100% duty) */
+ cooling-levels = <0 80 128 255>;
+ pinctrl-0 = <&pwm0_pins>;
+ pinctrl-names = "default";
+ pwms = <&pwm 0 50000>;
+ #cooling-cells = <2>;
+ };
+
+ gpio-keys {
+ compatible = "gpio-keys";
+
+ button-reset {
+ label = "reset";
+ gpios = <&pio 13 GPIO_ACTIVE_LOW>;
+ linux,code = <KEY_RESTART>;
+ };
+
+ button-wps {
+ label = "WPS";
+ gpios = <&pio 14 GPIO_ACTIVE_LOW>;
+ linux,code = <KEY_WPS_BUTTON>;
+ };
+ };
+
+ gpio-leds {
+ compatible = "gpio-leds";
+
+ led_red: sys-led-red {
+ color = <LED_COLOR_ID_RED>;
+ gpios = <&pca9555 15 GPIO_ACTIVE_HIGH>;
+ default-state = "on";
+ };
+
+ led_blue: sys-led-blue {
+ color = <LED_COLOR_ID_BLUE>;
+ gpios = <&pca9555 14 GPIO_ACTIVE_HIGH>;
+ default-state = "on";
+ };
+ };
+
+ reg_1p8v: regulator-dvdd1v8 {
+ compatible = "regulator-fixed";
+ regulator-name = "DVDD1V8_SOC";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+
+ reg_3p3v: regulator-3v3vd {
+ compatible = "regulator-fixed";
+ regulator-name = "3V3VD";
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+
+ /* SFP1 cage (LAN) */
+ sfp1: sfp1 {
+ compatible = "sff,sfp";
+ i2c-bus = <&imux1_sfp1>;
+ los-gpios = <&pio 70 GPIO_ACTIVE_HIGH>;
+ mod-def0-gpios = <&pio 69 GPIO_ACTIVE_LOW>;
+ tx-disable-gpios = <&pio 21 GPIO_ACTIVE_HIGH>;
+ maximum-power-milliwatt = <3000>;
+ };
+
+ /* SFP2 cage (WAN) */
+ sfp2: sfp2 {
+ compatible = "sff,sfp";
+ i2c-bus = <&imux2_sfp2>;
+ los-gpios = <&pio 2 GPIO_ACTIVE_HIGH>;
+ mod-def0-gpios = <&pio 1 GPIO_ACTIVE_LOW>;
+ tx-disable-gpios = <&pio 0 GPIO_ACTIVE_HIGH>;
+ maximum-power-milliwatt = <3000>;
+ };
+};
+
+&cci {
+ proc-supply = <&rt5190_buck3>;
+};
+
+&cpu0 {
+ proc-supply = <&rt5190_buck3>;
+};
+
+&cpu1 {
+ proc-supply = <&rt5190_buck3>;
+};
+
+&cpu2 {
+ proc-supply = <&rt5190_buck3>;
+};
+
+&cpu3 {
+ proc-supply = <&rt5190_buck3>;
+};
+
+&cpu_thermal {
+ trips {
+ cpu_trip_hot: hot {
+ temperature = <120000>;
+ hysteresis = <2000>;
+ type = "hot";
+ };
+
+ cpu_trip_active_high: active-high {
+ temperature = <115000>;
+ hysteresis = <2000>;
+ type = "active";
+ };
+
+ cpu_trip_active_med: active-med {
+ temperature = <85000>;
+ hysteresis = <2000>;
+ type = "active";
+ };
+
+ cpu_trip_active_low: active-low {
+ temperature = <40000>;
+ hysteresis = <2000>;
+ type = "active";
+ };
+ };
+
+ cooling-maps {
+ map-cpu-active-high {
+ /* active: set fan to cooling level 2 */
+ cooling-device = <&fan 3 3>;
+ trip = <&cpu_trip_active_high>;
+ };
+
+ map-cpu-active-med {
+ /* active: set fan to cooling level 1 */
+ cooling-device = <&fan 2 2>;
+ trip = <&cpu_trip_active_med>;
+ };
+
+ map-cpu-active-low {
+ /* active: set fan to cooling level 0 */
+ cooling-device = <&fan 1 1>;
+ trip = <&cpu_trip_active_low>;
+ };
+ };
+};
+
+&eth {
+ pinctrl-0 = <&mdio0_pins>;
+ pinctrl-names = "default";
+ status = "okay";
+};
+
+&fan {
+ pinctrl-0 = <&pwm0_pins>;
+ pinctrl-names = "default";
+ pwms = <&pwm 0 50000>;
+ status = "okay";
+};
+
+&gmac0 {
+ status = "okay";
+};
+
+&gsw_phy0 {
+ pinctrl-0 = <&gbe0_led0_pins>;
+ pinctrl-names = "gbe-led";
+};
+
+&gsw_phy0_led0 {
+ color = <LED_COLOR_ID_YELLOW>;
+ status = "okay";
+};
+
+&gsw_port0 {
+ label = "mgmt";
+};
+
+/* R4Pro has only port 0 connected, so disable the others */
+&gsw_phy1 {
+ status = "disabled";
+};
+
+&gsw_port1 {
+ status = "disabled";
+};
+
+&gsw_phy2 {
+ status = "disabled";
+};
+
+&gsw_port2 {
+ status = "disabled";
+};
+
+&gsw_phy3 {
+ status = "disabled";
+};
+
+&gsw_port3 {
+ status = "disabled";
+};
+
+&i2c0 {
+ pinctrl-0 = <&i2c0_pins>;
+ pinctrl-names = "default";
+ status = "okay";
+
+ rt5190a_64: rt5190a@64 {
+ compatible = "richtek,rt5190a";
+ reg = <0x64>;
+ vin2-supply = <&rt5190_buck1>;
+ vin3-supply = <&rt5190_buck1>;
+ vin4-supply = <&rt5190_buck1>;
+
+ regulators {
+ rt5190_buck1: buck1 {
+ regulator-name = "rt5190a-buck1";
+ regulator-min-microvolt = <5090000>;
+ regulator-max-microvolt = <5090000>;
+ regulator-allowed-modes =
+ <RT5190A_OPMODE_AUTO RT5190A_OPMODE_FPWM>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+
+ buck2 {
+ regulator-name = "vcore";
+ regulator-min-microvolt = <600000>;
+ regulator-max-microvolt = <1400000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+
+ rt5190_buck3: buck3 {
+ regulator-name = "vproc";
+ regulator-min-microvolt = <600000>;
+ regulator-max-microvolt = <1400000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+
+ buck4 {
+ regulator-name = "rt5190a-buck4";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-allowed-modes =
+ <RT5190A_OPMODE_AUTO RT5190A_OPMODE_FPWM>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+
+ ldo {
+ regulator-name = "rt5190a-ldo";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ };
+ };
+};
+
+&i2c1 {
+ pinctrl-0 = <&i2c1_pins>;
+ pinctrl-names = "default";
+ status = "okay";
+};
+
+&i2c2 {
+ pinctrl-0 = <&i2c2_1_pins>;
+ pinctrl-names = "default";
+ status = "okay";
+
+ pca9545: i2c-mux@70 {
+ compatible = "nxp,pca9545";
+ reg = <0x70>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ imux0: i2c@0 {
+ reg = <0>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ pca9555: i2c-gpio-expander@20 {
+ compatible = "nxp,pca9555";
+ reg = <0x20>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ };
+
+ rtc@51 {
+ compatible = "nxp,pcf8563";
+ reg = <0x51>;
+ };
+
+ eeprom@57 {
+ compatible = "atmel,24c02";
+ reg = <0x57>;
+ address-width = <8>;
+ pagesize = <8>;
+ size = <256>;
+ };
+ };
+
+ imux1_sfp1: i2c@1 {
+ reg = <1>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ };
+
+ imux2_sfp2: i2c@2 {
+ reg = <2>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ };
+
+ imux3_wifi: i2c@3 {
+ reg = <3>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ };
+ };
+};
+
+/* mPCIe SIM2 (11300000) */
+&pcie0 {
+ status = "okay";
+};
+
+/* mPCIe (11310000 near leds) SIM3 */
+&pcie1 {
+ status = "okay";
+};
+
+/* M.2 (11280000) 1L0 key-m SSD1 CN13 / key-b SIM1 CN15 */
+&pcie2 {
+ status = "okay";
+};
+
+/* M.2 (11290000) 1L1 key-m SSD2 CN14 / key-b SIM2 CN18 */
+&pcie3 {
+ status = "okay";
+};
+
+&pio {
+ gbe0_led0_pins: gbe0-led0-pins {
+ mux {
+ function = "led";
+ groups = "gbe0_led0";
+ };
+ };
+
+ i2c0_pins: i2c0-g0-pins {
+ mux {
+ function = "i2c";
+ groups = "i2c0_1";
+ };
+ };
+
+ i2c1_pins: i2c1-g0-pins {
+ mux {
+ function = "i2c";
+ groups = "i2c1_0";
+ };
+ };
+
+ i2c2_1_pins: i2c2-g1-pins {
+ mux {
+ function = "i2c";
+ groups = "i2c2_1";
+ };
+ };
+
+ mdio0_pins: mdio0-pins {
+ mux {
+ function = "eth";
+ groups = "mdc_mdio0";
+ };
+
+ conf {
+ pins = "SMI_0_MDC", "SMI_0_MDIO";
+ drive-strength = <8>;
+ };
+ };
+
+ mmc0_pins_emmc_51: mmc0-emmc-51-pins {
+ mux {
+ function = "flash";
+ groups = "emmc_51";
+ };
+ };
+
+ mmc0_pins_sdcard: mmc0-sdcard-pins {
+ mux {
+ function = "flash";
+ groups = "sdcard";
+ };
+ };
+
+ /* 1L0 0=key-b (CN15), 1=key-m (CN13) */
+ pcie-2-hog {
+ gpio-hog;
+ gpios = <79 GPIO_ACTIVE_HIGH>;
+ output-high;
+ };
+
+ /* 1L1 0=key-b (CN18), 1=key-m (CN14) */
+ pcie-3-hog {
+ gpio-hog;
+ gpios = <63 GPIO_ACTIVE_HIGH>;
+ output-high;
+ };
+
+ pwm0_pins: pwm0-pins {
+ mux {
+ groups = "pwm0";
+ function = "pwm";
+ };
+ };
+
+ spi0_flash_pins: spi0-flash-pins {
+ mux {
+ function = "spi";
+ groups = "spi0", "spi0_wp_hold";
+ };
+ };
+};
+
+&pwm {
+ status = "okay";
+};
+
+&serial0 {
+ status = "okay";
+};
+
+&spi0 {
+ pinctrl-0 = <&spi0_flash_pins>;
+ pinctrl-names = "default";
+ status = "okay";
+
+ spi_nand: nand@0 {
+ compatible = "spi-nand";
+ reg = <0>;
+ spi-max-frequency = <52000000>;
+ spi-rx-bus-width = <4>;
+ spi-tx-bus-width = <4>;
+ };
+};
+
+&spi_nand {
+ partitions {
+ compatible = "fixed-partitions";
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ partition@0 {
+ reg = <0x0 0x200000>;
+ label = "bl2";
+ };
+
+ partition@200000 {
+ compatible = "linux,ubi";
+ reg = <0x200000 0xfe00000>;
+ label = "ubi";
+ };
+ };
+};
+
+/* back USB */
+&ssusb0 {
+ /* Use U2P only instead of both U3P/U2P due to U3P serdes shared with pcie2 */
+ phys = <&xphyu2port0 PHY_TYPE_USB2>;
+ mediatek,u3p-dis-msk = <1>;
+ status = "okay";
+};
+
+/* front USB */
+&ssusb1 {
+ status = "okay";
+};
+
+&switch {
+ dsa,member = <1 0>;
+ status = "okay";
+};
+
+&tphy {
+ status = "okay";
+};
+
+&watchdog {
+ status = "okay";
+};
+
+&xsphy {
+ status = "okay";
+};
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