Ken Van Hoeylandt
127 lines
3.8 KiB
Devicetree
127 lines
3.8 KiB
Devicetree
/dts-v1/;
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#include <tactility/bindings/root.h>
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#include <tactility/bindings/battery_sense.h>
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#include <tactility/bindings/esp32_adc_oneshot.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_i2c.h>
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#include <tactility/bindings/esp32_sdmmc.h>
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#include <tactility/bindings/esp32_i8080.h>
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#include <tactility/bindings/esp32_ledc_backlight.h>
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#include <tactility/bindings/gpio_hog.h>
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#include <bindings/button_control.h>
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#include <bindings/st7789_i8080.h>
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#include <bindings/xpt2046_softspi.h>
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/ {
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compatible = "root";
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model = "LilyGO T-HMI";
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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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// Board power-enable pins. Must be asserted before the i8080 bus/display below start, since
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// devicetree devices are constructed and started earlier (kernel_init()) than the deprecated
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// HAL's initBoot() used to run. gpio-hog nodes run in declaration order, so they must stay
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// before the i8080 bus node.
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power_on {
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compatible = "tactility,gpio-hog";
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pin = <&gpio0 14 GPIO_FLAG_NONE>;
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mode = <GPIO_HOG_MODE_OUTPUT_HIGH>;
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};
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power_en {
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compatible = "tactility,gpio-hog";
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pin = <&gpio0 10 GPIO_FLAG_NONE>;
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mode = <GPIO_HOG_MODE_OUTPUT_HIGH>;
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};
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adc0 {
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compatible = "espressif,esp32-adc-oneshot";
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unit-id = <ADC_UNIT_1>;
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channels = <ADC_CHANNEL_4 ADC_ATTEN_DB_12 ADC_BITWIDTH_DEFAULT>;
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};
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// Battery voltage sits behind a 2:1 divider before reaching the ADC (see the deprecated HAL's
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// old Power.cpp: adcReadValue() * 2). 3300mV matches its uncalibrated fallback reference
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// voltage. Charge-percent curve is battery-sense's own fixed 3200-4200mV estimate (see
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// TactilityKernel/source/drivers/battery_sense.cpp) rather than the old driver's 3300-4200mV
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// ChargeFromVoltage curve - a shared kernel driver, not a per-board tunable.
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battery-sense {
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compatible = "battery-sense";
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io-channel = <&adc0 0>;
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reference-voltage-mv = <3300>;
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multiplier = <2000>;
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};
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display_backlight {
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compatible = "espressif,esp32-ledc-backlight";
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// Off by default so display power-on won't show the screen from before the last power loss.
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// The display backlight is turned on during the boot process.
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status = "disabled";
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pin-backlight = <&gpio0 38 GPIO_FLAG_NONE>;
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frequency-hz = <30000>;
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};
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i8080_0 {
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compatible = "espressif,esp32-i8080";
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pin-dc = <&gpio0 7 GPIO_FLAG_NONE>;
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pin-wr = <&gpio0 8 GPIO_FLAG_NONE>;
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pin-d0 = <&gpio0 48 GPIO_FLAG_NONE>;
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pin-d1 = <&gpio0 47 GPIO_FLAG_NONE>;
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pin-d2 = <&gpio0 39 GPIO_FLAG_NONE>;
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pin-d3 = <&gpio0 40 GPIO_FLAG_NONE>;
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pin-d4 = <&gpio0 41 GPIO_FLAG_NONE>;
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pin-d5 = <&gpio0 42 GPIO_FLAG_NONE>;
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pin-d6 = <&gpio0 45 GPIO_FLAG_NONE>;
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pin-d7 = <&gpio0 46 GPIO_FLAG_NONE>;
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// horizontal-resolution * vertical-resolution / 10 (partial buffer) * 2 bytes/pixel
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max-transfer-bytes = <15360>;
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cs-gpios = <&gpio0 6 GPIO_FLAG_NONE>;
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display@0 {
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compatible = "sitronix,st7789-i8080";
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horizontal-resolution = <240>;
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vertical-resolution = <320>;
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pixel-clock-hz = <16000000>;
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backlight = <&display_backlight>;
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gamma-curve = <2>;
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};
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};
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touch {
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compatible = "xptek,xpt2046-softspi";
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pin-mosi = <&gpio0 3 GPIO_FLAG_NONE>;
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pin-miso = <&gpio0 4 GPIO_FLAG_NONE>;
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pin-sck = <&gpio0 1 GPIO_FLAG_NONE>;
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pin-cs = <&gpio0 2 GPIO_FLAG_NONE>;
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x-max = <240>;
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y-max = <320>;
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};
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sdmmc0 {
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compatible = "espressif,esp32-sdmmc";
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status = "disabled"; // Late-init is required, otherwise mounting fails
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pin-clk = <&gpio0 12 GPIO_FLAG_NONE>;
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pin-cmd = <&gpio0 11 GPIO_FLAG_NONE>;
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pin-d0 = <&gpio0 13 GPIO_FLAG_NONE>;
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slot = <SDMMC_HOST_SLOT_1>;
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bus-width = <1>;
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pullups;
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};
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};
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