/*
* Device tree for LEGO MINDSTORMS EV3
*
* Copyright (C) 2017 David Lechner <david@lechnology.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation, version 2.
*/
/dts-v1/;
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/input/linux-event-codes.h>
#include <dt-bindings/pwm/pwm.h>
#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 = <KEY_ENTER>;
gpios = <&gpio 29 GPIO_ACTIVE_HIGH>;
};
left {
label = "Left";
linux,code = <KEY_LEFT>;
gpios = <&gpio 102 GPIO_ACTIVE_HIGH>;
};
back {
label = "Back";
linux,code = <KEY_BACKSPACE>;
gpios = <&gpio 106 GPIO_ACTIVE_HIGH>;
};
right {
label = "Right";
linux,code = <KEY_RIGHT>;
gpios = <&gpio 124 GPIO_ACTIVE_HIGH>;
};
down {
label = "Down";
linux,code = <KEY_DOWN>;
gpios = <&gpio 126 GPIO_ACTIVE_HIGH>;
};
up {
label = "Up";
linux,code = <KEY_UP>;
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 = <&>;
};
/*
* 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>;
};
&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>;
};
