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8a81ff173c
This adds a node for the TI ADS7957 analog/digital converter on LEGO MINDSTORMS EV3 as well as a regulator node that is used by the A/DC node. Signed-off-by: David Lechner <david@lechnology.com> Signed-off-by: Sekhar Nori <nsekhar@ti.com>
335 lines
6.2 KiB
Plaintext
335 lines
6.2 KiB
Plaintext
/*
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* Device tree for LEGO MINDSTORMS EV3
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*
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* Copyright (C) 2017 David Lechner <david@lechnology.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation, version 2.
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*/
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/dts-v1/;
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#include <dt-bindings/gpio/gpio.h>
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#include <dt-bindings/input/linux-event-codes.h>
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#include <dt-bindings/pwm/pwm.h>
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#include "da850.dtsi"
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/ {
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compatible = "lego,ev3", "ti,da850";
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model = "LEGO MINDSTORMS EV3";
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aliases {
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serial1 = &serial1;
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};
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memory@c0000000 {
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device_type = "memory";
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reg = <0xc0000000 0x04000000>;
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};
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/*
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* The buttons on the EV3 are mapped to keyboard keys.
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*/
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gpio_keys {
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compatible = "gpio-keys";
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#address-cells = <1>;
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#size-cells = <0>;
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label = "EV3 Brick Buttons";
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pinctrl-names = "default";
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pinctrl-0 = <&button_pins>, <&button_bias>;
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center {
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label = "Center";
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linux,code = <KEY_ENTER>;
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gpios = <&gpio 29 GPIO_ACTIVE_HIGH>;
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};
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left {
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label = "Left";
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linux,code = <KEY_LEFT>;
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gpios = <&gpio 102 GPIO_ACTIVE_HIGH>;
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};
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back {
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label = "Back";
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linux,code = <KEY_BACKSPACE>;
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gpios = <&gpio 106 GPIO_ACTIVE_HIGH>;
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};
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right {
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label = "Right";
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linux,code = <KEY_RIGHT>;
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gpios = <&gpio 124 GPIO_ACTIVE_HIGH>;
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};
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down {
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label = "Down";
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linux,code = <KEY_DOWN>;
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gpios = <&gpio 126 GPIO_ACTIVE_HIGH>;
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};
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up {
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label = "Up";
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linux,code = <KEY_UP>;
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gpios = <&gpio 127 GPIO_ACTIVE_HIGH>;
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};
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};
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/*
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* The EV3 has two built-in bi-color LEDs behind the buttons.
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*/
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leds {
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compatible = "gpio-leds";
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pinctrl-names = "default";
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pinctrl-0 = <&led_pins>;
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left_green {
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label = "led0:green:brick-status";
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/* GP6[13] */
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gpios = <&gpio 103 GPIO_ACTIVE_HIGH>;
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linux,default-trigger = "default-on";
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};
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right_red {
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label = "led1:red:brick-status";
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/* GP6[7] */
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gpios = <&gpio 108 GPIO_ACTIVE_HIGH>;
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linux,default-trigger = "default-on";
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};
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left_red {
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label = "led0:red:brick-status";
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/* GP6[12] */
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gpios = <&gpio 109 GPIO_ACTIVE_HIGH>;
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linux,default-trigger = "default-on";
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};
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right_green {
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label = "led1:green:brick-status";
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/* GP6[14] */
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gpios = <&gpio 110 GPIO_ACTIVE_HIGH>;
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linux,default-trigger = "default-on";
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};
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};
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/*
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* The EV3 is powered down by turning off the main 5V supply.
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*/
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gpio-poweroff {
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compatible = "gpio-poweroff";
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gpios = <&gpio 107 GPIO_ACTIVE_LOW>;
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pinctrl-names = "default";
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pinctrl-0 = <&system_power_pin>;
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};
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/*
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* This is a 5V current limiting regulator that is shared by USB,
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* the sensor (input) ports, the motor (output) ports and the A/DC.
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*/
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vcc5v: regulator1 {
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pinctrl-names = "default";
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pinctrl-0 = <&vcc5v_pins>;
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compatible = "regulator-fixed";
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regulator-name = "vcc5v";
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regulator-min-microvolt = <5000000>;
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regulator-max-microvolt = <5000000>;
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gpio = <&gpio 101 0>;
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over-current-gpios = <&gpio 99 GPIO_ACTIVE_LOW>;
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enable-active-high;
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regulator-boot-on;
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};
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/*
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* This is a simple voltage divider on VCC5V to provide a 2.5V
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* reference signal to the ADC.
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*/
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adc_ref: regulator2 {
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compatible = "regulator-fixed";
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regulator-name = "adc ref";
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regulator-min-microvolt = <2500000>;
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regulator-max-microvolt = <2500000>;
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regulator-boot-on;
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vin-supply = <&vcc5v>;
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};
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};
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&pmx_core {
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status = "okay";
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spi0_cs3_pin: pinmux_spi0_cs3_pin {
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pinctrl-single,bits = <
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/* CS3 */
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0xc 0x01000000 0x0f000000
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>;
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};
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mmc0_cd_pin: pinmux_mmc0_cd {
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pinctrl-single,bits = <
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/* GP5[14] */
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0x2C 0x00000080 0x000000f0
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>;
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};
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button_pins: pinmux_button_pins {
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pinctrl-single,bits = <
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/* GP1[13] */
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0x8 0x00000800 0x00000f00
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/* GP6[10] */
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0x34 0x00800000 0x00f00000
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/* GP6[6] */
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0x38 0x00000080 0x000000f0
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/* GP7[12], GP7[14], GP7[15] */
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0x40 0x00808800 0x00f0ff00
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>;
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};
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led_pins: pinmux_led_pins {
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pinctrl-single,bits = <
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/* GP6[12], GP6[13], GP6[14] */
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0x34 0x00008880 0x0000fff0
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/* GP6[7] */
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0x38 0x00000008 0x0000000f
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>;
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};
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system_power_pin: pinmux_system_power {
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pinctrl-single,bits = <
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/* GP6[11] */
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0x34 0x00080000 0x000f0000
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>;
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};
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vcc5v_pins: pinmux_vcc5v {
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pinctrl-single,bits = <
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/* GP6[5] */
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0x40 0x00000080 0x000000f0
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/* GP6[3] */
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0x4c 0x00008000 0x0000f000
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>;
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};
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};
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&pinconf {
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status = "okay";
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/* Buttons have external pulldown resistors */
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button_bias: button-bias-groups {
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disable {
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groups = "cp5", "cp24", "cp25", "cp28";
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bias-disable;
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};
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};
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};
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/* Input port 1 */
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&serial1 {
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status = "okay";
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pinctrl-names = "default";
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pinctrl-0 = <&serial1_rxtx_pins>;
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};
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&rtc0 {
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status = "okay";
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};
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&i2c0 {
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status = "okay";
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clock-frequency = <400000>;
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pinctrl-names = "default";
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pinctrl-0 = <&i2c0_pins>;
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/*
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* EEPROM contains the first stage bootloader, HW ID and Bluetooth MAC.
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*/
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eeprom@50 {
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compatible = "microchip,24c128";
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pagesize = <64>;
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read-only;
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reg = <0x50>;
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};
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};
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&wdt {
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status = "okay";
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};
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&mmc0 {
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status = "okay";
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max-frequency = <50000000>;
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bus-width = <4>;
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cd-gpios = <&gpio 94 GPIO_ACTIVE_LOW>;
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pinctrl-names = "default";
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pinctrl-0 = <&mmc0_pins>, <&mmc0_cd_pin>;
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};
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&spi0 {
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status = "okay";
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pinctrl-names = "default";
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pinctrl-0 = <&spi0_pins>, <&spi0_cs0_pin>, <&spi0_cs3_pin>;
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flash@0 {
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compatible = "n25q128a13", "jedec,spi-nor";
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reg = <0>;
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spi-max-frequency = <50000000>;
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ti,spi-wdelay = <8>;
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/* Partitions are based on the official firmware from LEGO */
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partitions {
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compatible = "fixed-partitions";
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#address-cells = <1>;
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#size-cells = <1>;
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partition@0 {
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label = "U-Boot";
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reg = <0 0x40000>;
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};
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partition@40000 {
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label = "U-Boot Env";
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reg = <0x40000 0x10000>;
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};
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partition@50000 {
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label = "Kernel";
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reg = <0x50000 0x200000>;
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};
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partition@250000 {
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label = "Filesystem";
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reg = <0x250000 0xa50000>;
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};
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partition@cb0000 {
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label = "Storage";
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reg = <0xcb0000 0x2f0000>;
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};
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};
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};
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adc: adc@3 {
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compatible = "ti,ads7957";
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reg = <3>;
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#io-channel-cells = <1>;
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spi-max-frequency = <10000000>;
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vref-supply = <&adc_ref>;
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};
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};
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&gpio {
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status = "okay";
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};
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&usb_phy {
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status = "okay";
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};
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&usb0 {
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status = "okay";
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};
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&usb1 {
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status = "okay";
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vbus-supply = <&vcc5v>;
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};
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