diff options
Diffstat (limited to 'arch/arm/boot/dts/ti/davinci/da850-lego-ev3.dts')
| -rw-r--r-- | arch/arm/boot/dts/ti/davinci/da850-lego-ev3.dts | 466 |
1 files changed, 466 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/ti/davinci/da850-lego-ev3.dts b/arch/arm/boot/dts/ti/davinci/da850-lego-ev3.dts new file mode 100644 index 000000000000..4df10379ff22 --- /dev/null +++ b/arch/arm/boot/dts/ti/davinci/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 = <&>; + }; + + 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: lcd-pins { + 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>; +}; |