// SPDX-License-Identifier: GPL-2.0-only /* * Device tree for LEGO MINDSTORMS EV3 * * Copyright (C) 2017 David Lechner */ /dts-v1/; #include #include #include #include "da850.dtsi" / { compatible = "lego,ev3", "ti,da850"; model = "LEGO MINDSTORMS EV3"; aliases { serial1 = &serial1; }; memory@c0000000 { device_type = "memory"; reg = <0xc0000000 0x04000000>; }; /* * The buttons on the EV3 are mapped to keyboard keys. */ gpio_keys { compatible = "gpio-keys"; label = "EV3 Brick Buttons"; pinctrl-names = "default"; pinctrl-0 = <&button_bias>; center { label = "Center"; linux,code = ; gpios = <&gpio 29 GPIO_ACTIVE_HIGH>; }; left { label = "Left"; linux,code = ; gpios = <&gpio 102 GPIO_ACTIVE_HIGH>; }; back { label = "Back"; linux,code = ; gpios = <&gpio 106 GPIO_ACTIVE_HIGH>; }; right { label = "Right"; linux,code = ; gpios = <&gpio 124 GPIO_ACTIVE_HIGH>; }; down { label = "Down"; linux,code = ; gpios = <&gpio 126 GPIO_ACTIVE_HIGH>; }; up { label = "Up"; linux,code = ; gpios = <&gpio 127 GPIO_ACTIVE_HIGH>; }; }; /* * The EV3 has two built-in bi-color LEDs behind the buttons. */ leds { compatible = "gpio-leds"; left_green { label = "led0:green:brick-status"; /* GP6[13] */ gpios = <&gpio 103 GPIO_ACTIVE_HIGH>; linux,default-trigger = "default-on"; }; right_red { label = "led1:red:brick-status"; /* GP6[7] */ gpios = <&gpio 108 GPIO_ACTIVE_HIGH>; linux,default-trigger = "default-on"; }; left_red { label = "led0:red:brick-status"; /* GP6[12] */ gpios = <&gpio 109 GPIO_ACTIVE_HIGH>; linux,default-trigger = "default-on"; }; right_green { label = "led1:green:brick-status"; /* GP6[14] */ gpios = <&gpio 110 GPIO_ACTIVE_HIGH>; linux,default-trigger = "default-on"; }; }; /* * The EV3 is powered down by turning off the main 5V supply. */ gpio-poweroff { compatible = "gpio-poweroff"; gpios = <&gpio 107 GPIO_ACTIVE_LOW>; }; sound { compatible = "pwm-beeper"; pinctrl-names = "default"; pinctrl-0 = <&ehrpwm0b_pins>; pwms = <&ehrpwm0 1 1000000 0>; amp-supply = <&>; }; cvdd: regulator0 { compatible = "regulator-fixed"; regulator-name = "cvdd"; regulator-min-microvolt = <1200000>; regulator-max-microvolt = <1200000>; regulator-always-on; regulator-boot-on; }; /* * This is a 5V current limiting regulator that is shared by USB, * the sensor (input) ports, the motor (output) ports and the A/DC. */ vcc5v: regulator1 { compatible = "regulator-fixed"; regulator-name = "vcc5v"; regulator-min-microvolt = <5000000>; regulator-max-microvolt = <5000000>; gpio = <&gpio 101 0>; over-current-gpios = <&gpio 99 GPIO_ACTIVE_LOW>; enable-active-high; regulator-boot-on; }; /* * This is a simple voltage divider on VCC5V to provide a 2.5V * reference signal to the ADC. */ adc_ref: regulator2 { compatible = "regulator-fixed"; regulator-name = "adc ref"; regulator-min-microvolt = <2500000>; regulator-max-microvolt = <2500000>; regulator-boot-on; vin-supply = <&vcc5v>; }; /* * This is the amplifier for the speaker. */ amp: regulator3 { compatible = "regulator-fixed"; regulator-name = "amp"; gpio = <&gpio 111 GPIO_ACTIVE_HIGH>; enable-active-high; }; /* * The EV3 can use 6-AA batteries or a rechargeable Li-ion battery pack. */ battery { compatible = "lego,ev3-battery"; io-channels = <&adc 4>, <&adc 3>; io-channel-names = "voltage", "current"; rechargeable-gpios = <&gpio 136 GPIO_ACTIVE_LOW>; }; bt_slow_clk: bt-clock { pinctrl-names = "default"; pinctrl-0 = <&ecap2_pins>, <&bt_clock_bias>; compatible = "pwm-clock"; #clock-cells = <0>; clock-frequency = <32768>; pwms = <&ecap2 0 30518 0>; }; /* ARM local RAM */ memory@ffff0000 { compatible = "syscon", "simple-mfd"; reg = <0xffff0000 0x2000>; /* 8k */ /* * The I2C bootloader looks for this magic value to either * boot normally or boot into a firmware update mode. */ reboot-mode { compatible = "syscon-reboot-mode"; offset = <0x1ffc>; mode-normal = <0x00000000>; mode-loader = <0x5555aaaa>; }; }; }; &ref_clk { clock-frequency = <24000000>; }; &cpu { cpu-supply = <&cvdd>; }; /* since we have a fixed regulator, we can't run at these points */ &opp_100 { status = "disabled"; }; &opp_200 { status = "disabled"; }; /* * The SoC is actually the 456MHz version, but because of the fixed regulator * This is the fastest we can go. */ &opp_375 { status = "okay"; }; &pmx_core { status = "okay"; ev3_lcd_pins: pinmux_lcd { pinctrl-single,bits = < /* SIMO, CLK */ 0x14 0x00100100 0x00f00f00 >; }; }; &pinconf { status = "okay"; /* Buttons have external pulldown resistors */ button_bias: button-bias-groups { disable { groups = "cp5", "cp24", "cp25", "cp28"; bias-disable; }; }; bt_clock_bias: bt-clock-bias-groups { disable { groups = "cp2"; bias-disable; }; }; bt_pic_bias: bt-pic-bias-groups { disable { groups = "cp20"; bias-disable; }; }; }; /* Input port 1 */ &serial1 { status = "okay"; pinctrl-names = "default"; pinctrl-0 = <&serial1_rxtx_pins>; }; &serial2 { pinctrl-names = "default"; pinctrl-0 = <&serial2_rxtx_pins>, <&serial2_rtscts_pins>, <&bt_pic_bias>; status = "okay"; bluetooth { compatible = "ti,cc2560"; clocks = <&bt_slow_clk>; clock-names = "ext_clock"; enable-gpios = <&gpio 73 GPIO_ACTIVE_HIGH>; max-speed = <2000000>; nvmem-cells = <&bdaddr>; nvmem-cell-names = "bd-address"; }; }; &rtc0 { status = "okay"; }; &i2c0 { status = "okay"; clock-frequency = <400000>; pinctrl-names = "default"; pinctrl-0 = <&i2c0_pins>; /* * EEPROM contains the first stage bootloader, HW ID and Bluetooth MAC. */ eeprom@50 { compatible = "microchip,24c128", "atmel,24c128"; pagesize = <64>; read-only; reg = <0x50>; #address-cells = <1>; #size-cells = <1>; bdaddr: bdaddr@3f06 { reg = <0x3f06 0x06>; }; }; }; &wdt { status = "okay"; }; &mmc0 { status = "okay"; max-frequency = <50000000>; bus-width = <4>; cd-gpios = <&gpio 94 GPIO_ACTIVE_LOW>; pinctrl-names = "default"; pinctrl-0 = <&mmc0_pins>; }; &spi0 { status = "okay"; pinctrl-names = "default"; pinctrl-0 = <&spi0_pins>, <&spi0_cs0_pin>, <&spi0_cs3_pin>; flash@0 { compatible = "n25q128a13", "jedec,spi-nor"; reg = <0>; spi-max-frequency = <50000000>; ti,spi-wdelay = <8>; /* Partitions are based on the official firmware from LEGO */ partitions { compatible = "fixed-partitions"; #address-cells = <1>; #size-cells = <1>; partition@0 { label = "U-Boot"; reg = <0 0x40000>; }; partition@40000 { label = "U-Boot Env"; reg = <0x40000 0x10000>; }; partition@50000 { label = "Kernel"; reg = <0x50000 0x200000>; }; partition@250000 { label = "Filesystem"; reg = <0x250000 0xa50000>; }; partition@cb0000 { label = "Storage"; reg = <0xcb0000 0x2f0000>; }; }; }; adc: adc@3 { compatible = "ti,ads7957"; reg = <3>; #io-channel-cells = <1>; spi-max-frequency = <1000000>; ti,spi-wdelay = <63>; vref-supply = <&adc_ref>; }; }; &spi1 { status = "okay"; pinctrl-0 = <&ev3_lcd_pins>; pinctrl-names = "default"; cs-gpios = <&gpio 44 GPIO_ACTIVE_LOW>; display@0{ compatible = "lego,ev3-lcd"; reg = <0>; spi-max-frequency = <10000000>; a0-gpios = <&gpio 43 GPIO_ACTIVE_HIGH>; reset-gpios = <&gpio 80 GPIO_ACTIVE_HIGH>; }; }; &ecap2 { status = "okay"; }; &ehrpwm0 { status = "okay"; }; &gpio { status = "okay"; /* Don't pull down battery voltage adc io channel */ batt_volt_en { gpio-hog; gpios = <6 GPIO_ACTIVE_HIGH>; output-high; }; /* Don't impede Bluetooth clock signal */ bt_clock_en { gpio-hog; gpios = <5 GPIO_ACTIVE_HIGH>; input; }; /* * There is a PIC microcontroller for interfacing with an Apple MFi * chip. This interferes with normal Bluetooth operation, so we need * to make sure it is turned off. Note: The publicly available * schematics from LEGO don't show that these pins are connected to * anything, but they are present in the source code from LEGO. */ bt_pic_en { gpio-hog; gpios = <51 GPIO_ACTIVE_HIGH>; output-low; }; bt_pic_rst { gpio-hog; gpios = <78 GPIO_ACTIVE_HIGH>; output-high; }; bt_pic_cts { gpio-hog; gpios = <87 GPIO_ACTIVE_HIGH>; input; }; }; &usb_phy { status = "okay"; }; &usb0 { status = "okay"; }; &usb1 { status = "okay"; vbus-supply = <&vcc5v>; };