/dts-v1/;

#include <tactility/bindings/root.h>
#include <tactility/bindings/battery_sense.h>
#include <tactility/bindings/esp32_adc_oneshot.h>
#include <tactility/bindings/esp32_ble.h>
#include <tactility/bindings/esp32_wifi_pinned.h>
#include <tactility/bindings/esp32_gpio.h>
#include <tactility/bindings/esp32_i2c.h>
#include <tactility/bindings/esp32_sdmmc.h>
#include <tactility/bindings/esp32_i8080.h>
#include <tactility/bindings/esp32_pwm_ledc.h>
#include <tactility/bindings/pwm_backlight.h>
#include <tactility/bindings/gpio_hog.h>
#include <bindings/button_control.h>
#include <bindings/st7789_i8080.h>
#include <bindings/xpt2046_softspi.h>

/ {
	compatible = "root";
	model = "LilyGO T-HMI";

	wifi0 {
		compatible = "espressif,esp32-wifi-pinned";
		status = "disabled";
	};

	ble0 {
		compatible = "espressif,esp32-ble";
		status = "disabled";
	};

	gpio0 {
		compatible = "espressif,esp32-gpio";
		gpio-count = <49>;
	};

	// Board power-enable pins. Must be asserted before the i8080 bus/display below start, since
	// devicetree devices are constructed and started earlier (kernel_init()) than the deprecated
	// HAL's initBoot() used to run. gpio-hog nodes run in declaration order, so they must stay
	// before the i8080 bus node.
	power_on {
		compatible = "gpio-hog";
		pin = <&gpio0 14 GPIO_FLAG_NONE>;
		mode = <GPIO_HOG_MODE_OUTPUT_HIGH>;
	};

	power_en {
		compatible = "gpio-hog";
		pin = <&gpio0 10 GPIO_FLAG_NONE>;
		mode = <GPIO_HOG_MODE_OUTPUT_HIGH>;
	};

	adc0 {
		compatible = "espressif,esp32-adc-oneshot";
		unit-id = <ADC_UNIT_1>;
		channels = <ADC_CHANNEL_4 ADC_ATTEN_DB_12 ADC_BITWIDTH_DEFAULT>;
	};

	// Battery voltage sits behind a 2:1 divider before reaching the ADC (see the deprecated HAL's
	// old Power.cpp: adcReadValue() * 2). 3300mV matches its uncalibrated fallback reference
	// voltage. Charge-percent curve is battery-sense's own fixed 3200-4200mV estimate (see
	// TactilityKernel/source/drivers/battery_sense.cpp) rather than the old driver's 3300-4200mV
	// ChargeFromVoltage curve - a shared kernel driver, not a per-board tunable.
	battery-sense {
		compatible = "battery-sense";
		io-channel = <&adc0 0>;
		reference-voltage-mv = <3300>;
		multiplier = <2000>;
	};

	display_backlight_pwm {
		compatible = "espressif,esp32-pwm-ledc";
		pin = <&gpio0 38 GPIO_FLAG_NONE>;
		period-ns = <33333>;
		ledc-timer = <0>;
		ledc-channel = <0>;
	};

	display_backlight {
		compatible = "pwm-backlight";
		// Off by default so display power-on won't show the screen from before the last power loss.
		// The display backlight is turned on during the boot process.
		status = "disabled";
		pwm = <&display_backlight_pwm>;
	};

	i8080_0 {
		compatible = "espressif,esp32-i8080";
		pin-dc = <&gpio0 7 GPIO_FLAG_NONE>;
		pin-wr = <&gpio0 8 GPIO_FLAG_NONE>;
		pin-d0 = <&gpio0 48 GPIO_FLAG_NONE>;
		pin-d1 = <&gpio0 47 GPIO_FLAG_NONE>;
		pin-d2 = <&gpio0 39 GPIO_FLAG_NONE>;
		pin-d3 = <&gpio0 40 GPIO_FLAG_NONE>;
		pin-d4 = <&gpio0 41 GPIO_FLAG_NONE>;
		pin-d5 = <&gpio0 42 GPIO_FLAG_NONE>;
		pin-d6 = <&gpio0 45 GPIO_FLAG_NONE>;
		pin-d7 = <&gpio0 46 GPIO_FLAG_NONE>;
		// horizontal-resolution * vertical-resolution / 10 (partial buffer) * 2 bytes/pixel
		max-transfer-bytes = <15360>;
		cs-gpios = <&gpio0 6 GPIO_FLAG_NONE>;

		display@0 {
			compatible = "sitronix,st7789-i8080";
			horizontal-resolution = <240>;
			vertical-resolution = <320>;
			pixel-clock-hz = <16000000>;
			backlight = <&display_backlight>;
			gamma-curve = <2>;
		};
	};

	touch {
		compatible = "xptek,xpt2046-softspi";
		pin-mosi = <&gpio0 3 GPIO_FLAG_NONE>;
		pin-miso = <&gpio0 4 GPIO_FLAG_NONE>;
		pin-sck = <&gpio0 1 GPIO_FLAG_NONE>;
		pin-cs = <&gpio0 2 GPIO_FLAG_NONE>;
		x-max = <240>;
		y-max = <320>;
	};

	sdmmc0 {
		compatible = "espressif,esp32-sdmmc";
		status = "disabled"; // Late-init is required, otherwise mounting fails
		pin-clk = <&gpio0 12 GPIO_FLAG_NONE>;
		pin-cmd = <&gpio0 11 GPIO_FLAG_NONE>;
		pin-d0 = <&gpio0 13 GPIO_FLAG_NONE>;
		slot = <SDMMC_HOST_SLOT_1>;
		bus-width = <1>;
		pullups;
	};
};