summaryrefslogtreecommitdiffstats
path: root/arch/arm/boot/dts/da850-lego-ev3.dts
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/boot/dts/da850-lego-ev3.dts')
-rw-r--r--arch/arm/boot/dts/da850-lego-ev3.dts466
1 files changed, 466 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/da850-lego-ev3.dts b/arch/arm/boot/dts/da850-lego-ev3.dts
new file mode 100644
index 000000000..afd04a423
--- /dev/null
+++ b/arch/arm/boot/dts/da850-lego-ev3.dts
@@ -0,0 +1,466 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Device tree for LEGO MINDSTORMS EV3
+ *
+ * Copyright (C) 2017 David Lechner <david@lechnology.com>
+ */
+
+/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 = <&amp>;
+ };
+
+ 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>;
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-07 23:09:31 +0000