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                 #address-cells = <1>;
  37                 #size-cells = <0>;
  38                 label = "EV3 Brick Buttons";
  39                 pinctrl-names = "default";
  40                 pinctrl-0 = <&button_pins>, <&button_bias>;
  41
  42                 center {
  43                         label = "Center";
  44                         linux,code = <KEY_ENTER>;
  45                         gpios = <&gpio 29 GPIO_ACTIVE_HIGH>;
  46                 };
  47
  48                 left {
  49                         label = "Left";
  50                         linux,code = <KEY_LEFT>;
  51                         gpios = <&gpio 102 GPIO_ACTIVE_HIGH>;
  52                 };
  53
  54                 back {
  55                         label = "Back";
  56                         linux,code = <KEY_BACKSPACE>;
  57                         gpios = <&gpio 106 GPIO_ACTIVE_HIGH>;
  58                 };
  59
  60                 right {
  61                         label = "Right";
  62                         linux,code = <KEY_RIGHT>;
  63                         gpios = <&gpio 124 GPIO_ACTIVE_HIGH>;
  64                 };
  65
  66                 down {
  67                         label = "Down";
  68                         linux,code = <KEY_DOWN>;
  69                         gpios = <&gpio 126 GPIO_ACTIVE_HIGH>;
  70                 };
  71
  72                 up {
  73                         label = "Up";
  74                         linux,code = <KEY_UP>;
  75                         gpios = <&gpio 127 GPIO_ACTIVE_HIGH>;
  76                 };
  77         };
  78
  79         /*
  80          * The EV3 has two built-in bi-color LEDs behind the buttons.
  81          */
  82         leds {
  83                 compatible = "gpio-leds";
  84                 pinctrl-names = "default";
  85                 pinctrl-0 = <&led_pins>;
  86
  87                 left_green {
  88                         label = "led0:green:brick-status";
  89                         /* GP6[13] */
  90                         gpios = <&gpio 103 GPIO_ACTIVE_HIGH>;
  91                         linux,default-trigger = "default-on";
  92                 };
  93
  94                 right_red {
  95                         label = "led1:red:brick-status";
  96                         /* GP6[7] */
  97                         gpios = <&gpio 108 GPIO_ACTIVE_HIGH>;
  98                         linux,default-trigger = "default-on";
  99                 };
 100
 101                 left_red {
 102                         label = "led0:red:brick-status";
 103                         /* GP6[12] */
 104                         gpios = <&gpio 109 GPIO_ACTIVE_HIGH>;
 105                         linux,default-trigger = "default-on";
 106                 };
 107
 108                 right_green {
 109                         label = "led1:green:brick-status";
 110                         /* GP6[14] */
 111                         gpios = <&gpio 110 GPIO_ACTIVE_HIGH>;
 112                         linux,default-trigger = "default-on";
 113                 };
 114         };
 115
 116         /*
 117          * The EV3 is powered down by turning off the main 5V supply.
 118          */
 119         gpio-poweroff {
 120                 compatible = "gpio-poweroff";
 121                 gpios = <&gpio 107 GPIO_ACTIVE_LOW>;
 122                 pinctrl-names = "default";
 123                 pinctrl-0 = <&system_power_pin>;
 124         };
 125
 126         sound {
 127                 compatible = "pwm-beeper";
 128                 pinctrl-names = "default";
 129                 pinctrl-0 = <&ehrpwm0b_pins>;
 130                 pwms = <&ehrpwm0 1 1000000 0>;
 131                 amp-supply = <&amp>;
 132         };
 133
 134         /*
 135          * This is a 5V current limiting regulator that is shared by USB,
 136          * the sensor (input) ports, the motor (output) ports and the A/DC.
 137          */
 138         vcc5v: regulator1 {
 139                 pinctrl-names = "default";
 140                 pinctrl-0 = <&vcc5v_pins>;
 141                 compatible = "regulator-fixed";
 142                 regulator-name = "vcc5v";
 143                 regulator-min-microvolt = <5000000>;
 144                 regulator-max-microvolt = <5000000>;
 145                 gpio = <&gpio 101 0>;
 146                 over-current-gpios = <&gpio 99 GPIO_ACTIVE_LOW>;
 147                 enable-active-high;
 148                 regulator-boot-on;
 149         };
 150
 151         /*
 152          * This is a simple voltage divider on VCC5V to provide a 2.5V
 153          * reference signal to the ADC.
 154          */
 155         adc_ref: regulator2 {
 156                 compatible = "regulator-fixed";
 157                 regulator-name = "adc ref";
 158                 regulator-min-microvolt = <2500000>;
 159                 regulator-max-microvolt = <2500000>;
 160                 regulator-boot-on;
 161                 vin-supply = <&vcc5v>;
 162         };
 163
 164         /*
 165          * This is the amplifier for the speaker.
 166          */
 167         amp: regulator3 {
 168                 pinctrl-names = "default";
 169                 pinctrl-0 = <&amp_pins>;
 170                 compatible = "regulator-fixed";
 171                 regulator-name = "amp";
 172                 gpio = <&gpio 111 GPIO_ACTIVE_HIGH>;
 173                 enable-active-high;
 174         };
 175
 176         /*
 177          * The EV3 can use 6-AA batteries or a rechargeable Li-ion battery pack.
 178          */
 179         battery {
 180                 pinctrl-names = "default";
 181                 pinctrl-0 = <&battery_pins>;
 182                 compatible = "lego,ev3-battery";
 183                 io-channels = <&adc 4>, <&adc 3>;
 184                 io-channel-names = "voltage", "current";
 185                 rechargeable-gpios = <&gpio 136 GPIO_ACTIVE_LOW>;
 186         };
 187 };
 188
 189 &pmx_core {
 190         status = "okay";
 191
 192         mmc0_cd_pin: pinmux_mmc0_cd {
 193                 pinctrl-single,bits = <
 194                         /* GP5[14] */
 195                         0x2C 0x00000080 0x000000f0
 196                 >;
 197         };
 198
 199         button_pins: pinmux_button_pins {
 200                 pinctrl-single,bits = <
 201                         /* GP1[13] */
 202                         0x8 0x00000800 0x00000f00
 203                         /* GP6[10] */
 204                         0x34 0x00800000 0x00f00000
 205                         /* GP6[6] */
 206                         0x38 0x00000080 0x000000f0
 207                         /* GP7[12], GP7[14], GP7[15] */
 208                         0x40 0x00808800 0x00f0ff00
 209                 >;
 210         };
 211
 212         led_pins: pinmux_led_pins {
 213                 pinctrl-single,bits = <
 214                         /* GP6[12], GP6[13], GP6[14] */
 215                         0x34 0x00008880 0x0000fff0
 216                         /* GP6[7] */
 217                         0x38 0x00000008 0x0000000f
 218                 >;
 219         };
 220
 221         system_power_pin: pinmux_system_power {
 222                 pinctrl-single,bits = <
 223                         /* GP6[11] */
 224                         0x34 0x00080000 0x000f0000
 225                 >;
 226         };
 227
 228         vcc5v_pins: pinmux_vcc5v {
 229                 pinctrl-single,bits = <
 230                         /* GP6[5] */
 231                         0x40 0x00000080 0x000000f0
 232                         /* GP6[3] */
 233                         0x4c 0x00008000 0x0000f000
 234                 >;
 235         };
 236
 237         amp_pins: pinmux_amp_pins {
 238                 pinctrl-single,bits = <
 239                         /* GP6[15] */
 240                         0x34 0x00000008 0x0000000f
 241                 >;
 242         };
 243
 244         battery_pins: pinmux_battery_pins {
 245                 pinctrl-single,bits = <
 246                         /* GP0[6] */
 247                         0x04 0x00000080 0x000000f0
 248                         /* GP8[8] */
 249                         0x4c 0x00000080 0x000000f0
 250                 >;
 251         };
 252
 253         ev3_lcd_pins: pinmux_lcd {
 254                 pinctrl-single,bits = <
 255                         /* SIMO, GP2[11], GP2[12], CLK */
 256                         0x14 0x00188100 0x00ffff00
 257                         /* GP5[0] */
 258                         0x30 0x80000000 0xf0000000
 259                 >;
 260         };
 261 };
 262
 263 &pinconf {
 264         status = "okay";
 265
 266         /* Buttons have external pulldown resistors */
 267         button_bias: button-bias-groups {
 268                 disable {
 269                         groups = "cp5", "cp24", "cp25", "cp28";
 270                         bias-disable;
 271                 };
 272         };
 273 };
 274
 275 /* Input port 1 */
 276 &serial1 {
 277         status = "okay";
 278         pinctrl-names = "default";
 279         pinctrl-0 = <&serial1_rxtx_pins>;
 280 };
 281
 282 &rtc0 {
 283         status = "okay";
 284 };
 285
 286 &i2c0 {
 287         status = "okay";
 288         clock-frequency = <400000>;
 289         pinctrl-names = "default";
 290         pinctrl-0 = <&i2c0_pins>;
 291
 292         /*
 293          * EEPROM contains the first stage bootloader, HW ID and Bluetooth MAC.
 294          */
 295         eeprom@50 {
 296                 compatible = "microchip,24c128";
 297                 pagesize = <64>;
 298                 read-only;
 299                 reg = <0x50>;
 300         };
 301 };
 302
 303 &wdt {
 304         status = "okay";
 305 };
 306
 307 &mmc0 {
 308         status = "okay";
 309         max-frequency = <50000000>;
 310         bus-width = <4>;
 311         cd-gpios = <&gpio 94 GPIO_ACTIVE_LOW>;
 312         pinctrl-names = "default";
 313         pinctrl-0 = <&mmc0_pins>, <&mmc0_cd_pin>;
 314 };
 315
 316 &spi0 {
 317         status = "okay";
 318         pinctrl-names = "default";
 319         pinctrl-0 = <&spi0_pins>, <&spi0_cs0_pin>, <&spi0_cs3_pin>;
 320
 321         flash@0 {
 322                 compatible = "n25q128a13", "jedec,spi-nor";
 323                 reg = <0>;
 324                 spi-max-frequency = <50000000>;
 325                 ti,spi-wdelay = <8>;
 326
 327                 /* Partitions are based on the official firmware from LEGO */
 328                 partitions {
 329                         compatible = "fixed-partitions";
 330                         #address-cells = <1>;
 331                         #size-cells = <1>;
 332
 333                         partition@0 {
 334                                 label = "U-Boot";
 335                                 reg = <0 0x40000>;
 336                         };
 337
 338                         partition@40000 {
 339                                 label = "U-Boot Env";
 340                                 reg = <0x40000 0x10000>;
 341                         };
 342
 343                         partition@50000 {
 344                                 label = "Kernel";
 345                                 reg = <0x50000 0x200000>;
 346                         };
 347
 348                         partition@250000 {
 349                                 label = "Filesystem";
 350                                 reg = <0x250000 0xa50000>;
 351                         };
 352
 353                         partition@cb0000 {
 354                                 label = "Storage";
 355                                 reg = <0xcb0000 0x2f0000>;
 356                         };
 357                 };
 358         };
 359
 360         adc: adc@3 {
 361                 compatible = "ti,ads7957";
 362                 reg = <3>;
 363                 #io-channel-cells = <1>;
 364                 spi-max-frequency = <10000000>;
 365                 vref-supply = <&adc_ref>;
 366         };
 367 };
 368
 369 &spi1 {
 370         status = "okay";
 371         pinctrl-0 = <&ev3_lcd_pins>;
 372         pinctrl-names = "default";
 373         cs-gpios = <&gpio 44 GPIO_ACTIVE_LOW>;
 374
 375         display@0{
 376                 compatible = "lego,ev3-lcd";
 377                 reg = <0>;
 378                 spi-max-frequency = <10000000>;
 379                 a0-gpios = <&gpio 43 GPIO_ACTIVE_HIGH>;
 380                 reset-gpios = <&gpio 80 GPIO_ACTIVE_HIGH>;
 381         };
 382 };
 383
 384 &ehrpwm0 {
 385         status = "okay";
 386 };
 387
 388 &gpio {
 389         status = "okay";
 390
 391         /* Don't pull down battery voltage adc io channel */
 392         batt_volt_en {
 393                 gpio-hog;
 394                 gpios = <6 GPIO_ACTIVE_HIGH>;
 395                 output-high;
 396         };
 397 };
 398
 399 &usb_phy {
 400         status = "okay";
 401 };
 402
 403 &usb0 {
 404         status = "okay";
 405 };
 406
 407 &usb1 {
 408         status = "okay";
 409         vbus-supply = <&vcc5v>;
 410 };