Surface Pro 11 Digitizer DTS Attempts

hid-spi.dts

// SPDX-License-Identifier: BSD-3-Clause
/*
 * Copyright (c) 2025 Hugo Melder <contact@hugomelder.com>
 */

/* Enable HID over SPI */
/dts-v1/;
/plugin/;

#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/interrupt-controller/irq.h>
#include <dt-bindings/regulator/qcom,rpmh-regulator.h>

/ {
	compatible = "microsoft,denali", "qcom,x1e80100";
};

&spi10 {
	status = "okay";

	hid@0 {
		compatible = "hid-over-spi";

		reg = <0>;
		spi-max-frequency = <12500000>;

		interrupts-extended = <&tlmm 51 IRQ_TYPE_EDGE_FALLING>;

		pinctrl-names = "active", "sleep", "reset";
		pinctrl-0 = <&spi10_hid0_reset_deassert &spi10_hid0_int_bias>;
		pinctrl-1 = <&spi10_hid0_reset_assert &spi10_hid0_int_unbias>;
		pinctrl-2 = <&spi10_hid0_reset_assert &spi10_hid0_int_bias>;

		vdd-supply = <&vreg_ts_5p0>;

		hid-descr-addr = <1>;
	};
};

&tlmm {
	spi10_hid0_reset_deassert: spi10-hid1-reset-deassert {
		pins = "gpio48";
		function = "gpio";

		drive-strength = <2>;
		bias-disable;
		output-high;
	};

	spi10_hid0_reset_assert: spi10-hid1-reset-assert {
		pins = "gpio48";
		function = "gpio";

		drive-strength = <2>;
		bias-disable;
		output-low;
	};

	spi10_hid0_int_bias: spi10-hid1-int-bias {
		pins = "gpio51";
		function = "gpio";

		input-enable;
		bias-pull-up;
	};

	spi10_hid0_int_unbias: spi10-hid1-int-unbias {
		pins = "gpio51";
		function = "gpio";

		input-enable;
		bias-disable;
	};

	ts_5v_en_default_state: ts-5v-en-default-state {
		pins = "gpio64";
		function = "gpio";
	};
};

&{/reserved-memory} {
	vreg_ts_5p0: ts-5p0-regulator {
		compatible = "regulator-fixed";
		regulator-name = "vreg_ts_5p0";

		regulator-min-microvolt = <5000000>;
		regulator-max-microvolt = <5000000>;

		gpio = <&tlmm 64 GPIO_ACTIVE_HIGH>;
		enable-active-high;

		pinctrl-names = "default";
		pinctrl-0 = <&ts_5v_en_default_state>;
	};
};