Ken Van Hoeylandt
242 lines
6.4 KiB
Devicetree
242 lines
6.4 KiB
Devicetree
/dts-v1/;
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#include <tactility/bindings/root.h>
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#include <tactility/bindings/esp32_ble.h>
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#include <tactility/bindings/esp32_wifi_pinned.h>
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#include <tactility/bindings/esp32_gpio.h>
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#include <tactility/bindings/esp32_grove.h>
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#include <tactility/bindings/esp32_i2c.h>
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#include <tactility/bindings/esp32_i2s.h>
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#include <tactility/bindings/esp32_spi.h>
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#include <tactility/bindings/esp32_uart.h>
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#include <bindings/aw88298.h>
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#include <bindings/aw9523b.h>
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#include <bindings/axp2101.h>
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#include <bindings/axp2101_backlight.h>
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#include <bindings/bm8563.h>
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#include <bindings/bmi270.h>
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#include <bindings/es7210.h>
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#include <bindings/ft6x36.h>
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#include <bindings/ili9341.h>
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#include <bindings/ina226.h>
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#include <bindings/py32ioexpander.h>
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#include <tactility/bindings/esp32_sdspi.h>
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#include <tactility/bindings/gpio_hog.h>
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// Reference: https://docs.m5stack.com/en/StackChan
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/ {
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compatible = "root";
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model = "M5Stack StackChan";
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wifi0 {
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compatible = "espressif,esp32-wifi-pinned";
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status = "disabled";
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};
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ble0 {
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compatible = "espressif,esp32-ble";
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status = "disabled";
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};
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gpio0 {
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compatible = "espressif,esp32-gpio";
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gpio-count = <49>;
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};
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// AW88298 speaker + ES7210 microphone
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i2s0 {
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compatible = "espressif,esp32-i2s";
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port = <I2S_NUM_0>;
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pin-bclk = <&gpio0 34 GPIO_FLAG_NONE>;
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pin-ws = <&gpio0 33 GPIO_FLAG_NONE>;
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pin-data-out = <&gpio0 13 GPIO_FLAG_NONE>;
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pin-data-in = <&gpio0 14 GPIO_FLAG_NONE>;
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pin-mclk = <&gpio0 0 GPIO_FLAG_NONE>;
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};
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i2c_internal {
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compatible = "espressif,esp32-i2c";
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port = <I2C_NUM_0>;
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clock-frequency = <100000>;
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pin-sda = <&gpio0 12 GPIO_FLAG_NONE>;
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pin-scl = <&gpio0 11 GPIO_FLAG_NONE>;
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// PY32L020 body IO expander — controls WS2812C LED ring (12 LEDs)
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py32 {
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compatible = "m5stack,py32ioexpander";
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reg = <0x6F>;
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};
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bmi270 {
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compatible = "bosch,bmi270";
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reg = <0x69>;
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};
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bm8563 {
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compatible = "belling,bm8563";
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reg = <0x51>;
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};
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ina226 {
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compatible = "ti,ina226";
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reg = <0x41>;
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shunt-milliohms = <10>;
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power-supply;
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};
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// P0_0 = touch reset, P0_1 = bus-out enable, P0_2 = AW88298 reset,
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// P0_4 = SD card switch, P1_1 = LCD reset, P1_7 = boost enable (SY7088)
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aw9523b {
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compatible = "awinic,aw9523b";
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reg = <0x58>;
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// Bus-out enable, AW88298 (audio amp) reset, SD card power switch and boost enable
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// (SY7088) are AW9523B pins with no owning peripheral driver yet.
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aw9523_bus_out_enable {
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compatible = "gpio-hog";
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pin = <&aw9523b 1 GPIO_FLAG_NONE>;
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mode = <GPIO_HOG_MODE_OUTPUT_HIGH>;
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};
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aw9523_sdcard_switch {
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compatible = "gpio-hog";
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pin = <&aw9523b 4 GPIO_FLAG_NONE>;
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mode = <GPIO_HOG_MODE_OUTPUT_HIGH>;
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};
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aw9523_boost_enable {
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compatible = "gpio-hog";
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pin = <&aw9523b 15 GPIO_FLAG_NONE>;
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mode = <GPIO_HOG_MODE_OUTPUT_HIGH>;
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};
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};
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aw88298 {
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compatible = "awinic,aw88298";
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reg = <0x36>;
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i2s = <&i2s0>;
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pin-reset = <&aw9523b 2 GPIO_FLAG_NONE>;
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};
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// Same rail assignment as CoreS3: ALDO1=AW88298, ALDO2=ES7210, ALDO3=camera
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// (not yet implemented, but harmless to power), ALDO4=TF/SD card. BLDO1/BLDO2 are
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// enabled with no specific voltage requirement.
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axp2101 {
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compatible = "x-powers,axp2101";
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reg = <0x34>;
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aldo1-millivolt = <1800>;
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aldo1-enabled;
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aldo2-millivolt = <3300>;
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aldo2-enabled;
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aldo3-millivolt = <3300>;
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aldo3-enabled;
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aldo4-millivolt = <3300>;
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aldo4-enabled;
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bldo1-enabled;
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bldo2-enabled;
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display_backlight {
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compatible = "axp2101-backlight";
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ldo = <AXP2101_DLDO1>;
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min-millivolt = <2500>;
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max-millivolt = <3300>;
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};
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};
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touch {
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compatible = "focaltech,ft6x36";
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reg = <0x38>;
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x-max = <319>;
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y-max = <239>;
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pin-reset = <&aw9523b 0 GPIO_FLAG_NONE>;
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};
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es7210 {
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compatible = "everest,es7210";
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reg = <0x40>;
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i2s = <&i2s0>;
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// Only MIC1/MIC2 are wired to real capsules (see schematic); MIC3/MIC4
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// slots carry AEC_P/AEC_N reference signal, not microphone audio.
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mic-mask = <3>;
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// M5Unified applies a 4x post-gain "magnification" for this exact mic
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// wiring (see M5Unified.cpp _mic_data_cb_cores3): the ES7210's own
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// hardware ADC gain (already near-max via the default 90% input volume
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// setting, ~34dB of its 0-37.5dB range) still isn't enough for these
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// capsules on their own.
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input-gain-percent = <400>;
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};
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// TODO: Si12T 3-zone head touch @ 0x68 — INT active-low, 10kΩ pull-up to 3.3V; driver not yet implemented
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// TODO: GC0308 camera @ 0x21 — requires i2c_master driver, not yet available
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// TODO: LTR-553ALS-WA proximity/light @ 0x23 — no driver yet
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// TODO: BMM150 magnetometer @ 0x10 — accessible only via BMI270 aux I2C
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};
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// TODO: Servo UART (SCS9009, 1 Mbaud) — TX=GPIO6, RX=GPIO7
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uart_port_a: uart1 {
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compatible = "espressif,esp32-uart";
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status = "disabled";
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port = <UART_NUM_1>;
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pin-tx = <&gpio0 6 GPIO_FLAG_NONE>;
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pin-rx = <&gpio0 7 GPIO_FLAG_NONE>;
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};
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port_a: grove0 {
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compatible = "espressif,esp32-grove";
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defaultMode = <GROVE_MODE_I2C>;
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pinSdaTx = <&gpio0 2 GPIO_FLAG_NONE>;
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pinSclRx = <&gpio0 1 GPIO_FLAG_NONE>;
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uartPort = <UART_NUM_2>;
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i2cPort = <I2C_NUM_1>;
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i2cClockFrequency = <400000>;
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};
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port_b: grove1 {
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compatible = "espressif,esp32-grove";
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defaultMode = <GROVE_MODE_UART>;
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pinSdaTx = <&gpio0 9 GPIO_FLAG_NONE>;
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pinSclRx = <&gpio0 8 GPIO_FLAG_NONE>;
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uartPort = <UART_NUM_2>;
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i2cPort = <I2C_NUM_1>;
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i2cClockFrequency = <400000>;
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};
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port_c: grove2 {
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compatible = "espressif,esp32-grove";
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defaultMode = <GROVE_MODE_DISABLED>;
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pinSdaTx = <&gpio0 17 GPIO_FLAG_NONE>;
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pinSclRx = <&gpio0 18 GPIO_FLAG_NONE>;
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uartPort = <UART_NUM_2>;
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i2cPort = <I2C_NUM_1>;
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i2cClockFrequency = <400000>;
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};
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spi0 {
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compatible = "espressif,esp32-spi";
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host = <SPI2_HOST>;
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cs-gpios = <&gpio0 3 GPIO_FLAG_NONE>, // Display
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<&gpio0 4 GPIO_FLAG_NONE>; // SD card
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pin-mosi = <&gpio0 37 GPIO_FLAG_NONE>;
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pin-miso = <&gpio0 35 GPIO_FLAG_NONE>;
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pin-sclk = <&gpio0 36 GPIO_FLAG_NONE>;
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display@0 {
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compatible = "ilitek,ili9341";
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horizontal-resolution = <320>;
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vertical-resolution = <240>;
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invert-color;
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bgr-order;
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pixel-clock-hz = <40000000>;
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pin-dc = <&gpio0 35 GPIO_FLAG_NONE>;
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pin-reset = <&aw9523b 9 GPIO_FLAG_NONE>;
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backlight = <&display_backlight>;
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};
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sdcard@1 {
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compatible = "espressif,esp32-sdspi";
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status = "disabled"; // Must be started after display
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frequency-khz = <20000>;
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};
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};
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};
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