arch/arm/boot/dts/da850-lego-ev3.dts

   1 /*
   2  * Device tree for LEGO MINDSTORMS EV3
   3  *
   4  * Copyright (C) 2017 David Lechner <david@lechnology.com>
   5  *
   6  * This program is free software; you can redistribute  it and/or modify it
   7  * under  the terms of  the GNU General  Public License as published by the
   8  * Free Software Foundation, version 2.
   9  */
  10
  11 /dts-v1/;
  12 #include <dt-bindings/gpio/gpio.h>
  13 #include <dt-bindings/input/linux-event-codes.h>
  14 #include <dt-bindings/pwm/pwm.h>
  15
  16 #include "da850.dtsi"
  17
  18 / {
  19         compatible = "lego,ev3", "ti,da850";
  20         model = "LEGO MINDSTORMS EV3";
  21
  22         aliases {
  23                 serial1 = &serial1;
  24         };
  25
  26         memory@c0000000 {
  27                 device_type = "memory";
  28                 reg = <0xc0000000 0x04000000>;
  29         };
  30
  31         /*
  32          * The buttons on the EV3 are mapped to keyboard keys.
  33          */
  34         gpio_keys {
  35                 compatible = "gpio-keys";
  36                 label = "EV3 Brick Buttons";
  37                 pinctrl-names = "default";
  38                 pinctrl-0 = <&button_bias>;
  39
  40                 center {
  41                         label = "Center";
  42                         linux,code = <KEY_ENTER>;
  43                         gpios = <&gpio 29 GPIO_ACTIVE_HIGH>;
  44                 };
  45
  46                 left {
  47                         label = "Left";
  48                         linux,code = <KEY_LEFT>;
  49                         gpios = <&gpio 102 GPIO_ACTIVE_HIGH>;
  50                 };
  51
  52                 back {
  53                         label = "Back";
  54                         linux,code = <KEY_BACKSPACE>;
  55                         gpios = <&gpio 106 GPIO_ACTIVE_HIGH>;
  56                 };
  57
  58                 right {
  59                         label = "Right";
  60                         linux,code = <KEY_RIGHT>;
  61                         gpios = <&gpio 124 GPIO_ACTIVE_HIGH>;
  62                 };
  63
  64                 down {
  65                         label = "Down";
  66                         linux,code = <KEY_DOWN>;
  67                         gpios = <&gpio 126 GPIO_ACTIVE_HIGH>;
  68                 };
  69
  70                 up {
  71                         label = "Up";
  72                         linux,code = <KEY_UP>;
  73                         gpios = <&gpio 127 GPIO_ACTIVE_HIGH>;
  74                 };
  75         };
  76
  77         /*
  78          * The EV3 has two built-in bi-color LEDs behind the buttons.
  79          */
  80         leds {
  81                 compatible = "gpio-leds";
  82
  83                 left_green {
  84                         label = "led0:green:brick-status";
  85                         /* GP6[13] */
  86                         gpios = <&gpio 103 GPIO_ACTIVE_HIGH>;
  87                         linux,default-trigger = "default-on";
  88                 };
  89
  90                 right_red {
  91                         label = "led1:red:brick-status";
  92                         /* GP6[7] */
  93                         gpios = <&gpio 108 GPIO_ACTIVE_HIGH>;
  94                         linux,default-trigger = "default-on";
  95                 };
  96
  97                 left_red {
  98                         label = "led0:red:brick-status";
  99                         /* GP6[12] */
 100                         gpios = <&gpio 109 GPIO_ACTIVE_HIGH>;
 101                         linux,default-trigger = "default-on";
 102                 };
 103
 104                 right_green {
 105                         label = "led1:green:brick-status";
 106                         /* GP6[14] */
 107                         gpios = <&gpio 110 GPIO_ACTIVE_HIGH>;
 108                         linux,default-trigger = "default-on";
 109                 };
 110         };
 111
 112         /*
 113          * The EV3 is powered down by turning off the main 5V supply.
 114          */
 115         gpio-poweroff {
 116                 compatible = "gpio-poweroff";
 117                 gpios = <&gpio 107 GPIO_ACTIVE_LOW>;
 118         };
 119
 120         sound {
 121                 compatible = "pwm-beeper";
 122                 pinctrl-names = "default";
 123                 pinctrl-0 = <&ehrpwm0b_pins>;
 124                 pwms = <&ehrpwm0 1 1000000 0>;
 125                 amp-supply = <&amp>;
 126         };
 127
 128         /*
 129          * This is a 5V current limiting regulator that is shared by USB,
 130          * the sensor (input) ports, the motor (output) ports and the A/DC.
 131          */
 132         vcc5v: regulator1 {
 133                 compatible = "regulator-fixed";
 134                 regulator-name = "vcc5v";
 135                 regulator-min-microvolt = <5000000>;
 136                 regulator-max-microvolt = <5000000>;
 137                 gpio = <&gpio 101 0>;
 138                 over-current-gpios = <&gpio 99 GPIO_ACTIVE_LOW>;
 139                 enable-active-high;
 140                 regulator-boot-on;
 141         };
 142
 143         /*
 144          * This is a simple voltage divider on VCC5V to provide a 2.5V
 145          * reference signal to the ADC.
 146          */
 147         adc_ref: regulator2 {
 148                 compatible = "regulator-fixed";
 149                 regulator-name = "adc ref";
 150                 regulator-min-microvolt = <2500000>;
 151                 regulator-max-microvolt = <2500000>;
 152                 regulator-boot-on;
 153                 vin-supply = <&vcc5v>;
 154         };
 155
 156         /*
 157          * This is the amplifier for the speaker.
 158          */
 159         amp: regulator3 {
 160                 compatible = "regulator-fixed";
 161                 regulator-name = "amp";
 162                 gpio = <&gpio 111 GPIO_ACTIVE_HIGH>;
 163                 enable-active-high;
 164         };
 165
 166         /*
 167          * The EV3 can use 6-AA batteries or a rechargeable Li-ion battery pack.
 168          */
 169         battery {
 170                 compatible = "lego,ev3-battery";
 171                 io-channels = <&adc 4>, <&adc 3>;
 172                 io-channel-names = "voltage", "current";
 173                 rechargeable-gpios = <&gpio 136 GPIO_ACTIVE_LOW>;
 174         };
 175
 176         /* ARM local RAM */
 177         memory@ffff0000 {
 178                 compatible = "syscon", "simple-mfd";
 179                 reg = <0xffff0000 0x2000>; /* 8k */
 180
 181                 /*
 182                  * The I2C bootloader looks for this magic value to either
 183                  * boot normally or boot into a firmware update mode.
 184                  */
 185                 reboot-mode {
 186                         compatible = "syscon-reboot-mode";
 187                         offset = <0x1ffc>;
 188                         mode-normal = <0x00000000>;
 189                         mode-loader = <0x5555aaaa>;
 190                 };
 191         };
 192 };
 193
 194 &pmx_core {
 195         status = "okay";
 196
 197         ev3_lcd_pins: pinmux_lcd {
 198                 pinctrl-single,bits = <
 199                         /* SIMO, CLK */
 200                         0x14 0x00100100 0x00f00f00
 201                 >;
 202         };
 203 };
 204
 205 &pinconf {
 206         status = "okay";
 207
 208         /* Buttons have external pulldown resistors */
 209         button_bias: button-bias-groups {
 210                 disable {
 211                         groups = "cp5", "cp24", "cp25", "cp28";
 212                         bias-disable;
 213                 };
 214         };
 215 };
 216
 217 /* Input port 1 */
 218 &serial1 {
 219         status = "okay";
 220         pinctrl-names = "default";
 221         pinctrl-0 = <&serial1_rxtx_pins>;
 222 };
 223
 224 &rtc0 {
 225         status = "okay";
 226 };
 227
 228 &i2c0 {
 229         status = "okay";
 230         clock-frequency = <400000>;
 231         pinctrl-names = "default";
 232         pinctrl-0 = <&i2c0_pins>;
 233
 234         /*
 235          * EEPROM contains the first stage bootloader, HW ID and Bluetooth MAC.
 236          */
 237         eeprom@50 {
 238                 compatible = "microchip,24c128", "atmel,24c128";
 239                 pagesize = <64>;
 240                 read-only;
 241                 reg = <0x50>;
 242         };
 243 };
 244
 245 &wdt {
 246         status = "okay";
 247 };
 248
 249 &mmc0 {
 250         status = "okay";
 251         max-frequency = <50000000>;
 252         bus-width = <4>;
 253         cd-gpios = <&gpio 94 GPIO_ACTIVE_LOW>;
 254         pinctrl-names = "default";
 255         pinctrl-0 = <&mmc0_pins>;
 256 };
 257
 258 &spi0 {
 259         status = "okay";
 260         pinctrl-names = "default";
 261         pinctrl-0 = <&spi0_pins>, <&spi0_cs0_pin>, <&spi0_cs3_pin>;
 262
 263         flash@0 {
 264                 compatible = "n25q128a13", "jedec,spi-nor";
 265                 reg = <0>;
 266                 spi-max-frequency = <50000000>;
 267                 ti,spi-wdelay = <8>;
 268
 269                 /* Partitions are based on the official firmware from LEGO */
 270                 partitions {
 271                         compatible = "fixed-partitions";
 272                         #address-cells = <1>;
 273                         #size-cells = <1>;
 274
 275                         partition@0 {
 276                                 label = "U-Boot";
 277                                 reg = <0 0x40000>;
 278                         };
 279
 280                         partition@40000 {
 281                                 label = "U-Boot Env";
 282                                 reg = <0x40000 0x10000>;
 283                         };
 284
 285                         partition@50000 {
 286                                 label = "Kernel";
 287                                 reg = <0x50000 0x200000>;
 288                         };
 289
 290                         partition@250000 {
 291                                 label = "Filesystem";
 292                                 reg = <0x250000 0xa50000>;
 293                         };
 294
 295                         partition@cb0000 {
 296                                 label = "Storage";
 297                                 reg = <0xcb0000 0x2f0000>;
 298                         };
 299                 };
 300         };
 301
 302         adc: adc@3 {
 303                 compatible = "ti,ads7957";
 304                 reg = <3>;
 305                 #io-channel-cells = <1>;
 306                 spi-max-frequency = <10000000>;
 307                 vref-supply = <&adc_ref>;
 308         };
 309 };
 310
 311 &spi1 {
 312         status = "okay";
 313         pinctrl-0 = <&ev3_lcd_pins>;
 314         pinctrl-names = "default";
 315         cs-gpios = <&gpio 44 GPIO_ACTIVE_LOW>;
 316
 317         display@0{
 318                 compatible = "lego,ev3-lcd";
 319                 reg = <0>;
 320                 spi-max-frequency = <10000000>;
 321                 a0-gpios = <&gpio 43 GPIO_ACTIVE_HIGH>;
 322                 reset-gpios = <&gpio 80 GPIO_ACTIVE_HIGH>;
 323         };
 324 };
 325
 326 &ehrpwm0 {
 327         status = "okay";
 328 };
 329
 330 &gpio {
 331         status = "okay";
 332
 333         /* Don't pull down battery voltage adc io channel */
 334         batt_volt_en {
 335                 gpio-hog;
 336                 gpios = <6 GPIO_ACTIVE_HIGH>;
 337                 output-high;
 338         };
 339 };
 340
 341 &usb_phy {
 342         status = "okay";
 343 };
 344
 345 &usb0 {
 346         status = "okay";
 347 };
 348
 349 &usb1 {
 350         status = "okay";
 351         vbus-supply = <&vcc5v>;
 352 };