arch/arm64/boot/dts/google/gs101-whitefin-touch.dtsi

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Google Whitefin device tree source
 *
 * Copyright 2020 Google Inc.
 *
 */

/* Touch is connected to spi_11, pins:
 *   CLK=GPP23[0], MOSI=GPP23[1], MISO=GPP23[2], CS=GPP23[3]
 * TS_RESET_L = AE34 = XAPC_GPIO10 = GPP26[0] = <&gpp26 0 0>
 * TS_SPI_SEL = AD34 = XAPC_GPIO11 = GPP26[1] = <&gpp26 1 0>
 * TS_INT_L = D11 = XEINT_20 = GPA9[0] = <&gpa9 0 0>
 *
 * DVDD = PP1800_L25M_TSP_DVDD = F10 = VLDO25M = "PP1800_L25M_TSP"?
 * AVDD = PP3300_L26M_TS_AVDD  = E13 = VLDO26M = "PP3300_L26M_TSP"?
 */

#include <dt-bindings/pinctrl/samsung.h>
#include <dt-bindings/pinctrl/gs101.h>

&pinctrl_0 {
	sec_ts_irq: sec_ts-irq {
		samsung,pins = "gpa9-0";
		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
		samsung,pin-drv = <GS101_PIN_DRV_2_5_MA>;
	};
};

&pinctrl_5 {
	sec_ts_reset: sec_ts-reset {
		samsung,pins = "gpp26-0";
		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
	};

	sec_ts_switch: sec_ts-switch {
		samsung,pins = "gpp26-1";
		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
	};

	spi11_bus: spi11-bus {
		samsung,pins = "gpp23-0", "gpp23-1", "gpp23-2";
		samsung,pin-function = <EXYNOS_PIN_FUNC_2>;
		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
		samsung,pin-drv = <GS101_PIN_DRV_5_MA>;
	};

	spi11_cs: spi11-cs {
		samsung,pins = "gpp23-3";
		samsung,pin-function = <EXYNOS_PIN_FUNC_OUTPUT>;
		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
		samsung,pin-drv = <GS101_PIN_DRV_5_MA>;
	};

	spi11_cs_func: spi11-cs-func {
		samsung,pins = "gpp23-3";
		samsung,pin-function = <EXYNOS_PIN_FUNC_2>;
		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
		samsung,pin-drv = <GS101_PIN_DRV_5_MA>;
	};
};

&spi_11 {
	#address-cells = <1>;
	#size-cells = <0>;
	status = "okay";
	pinctrl-names = "default";
	pinctrl-0 = <&spi11_bus &spi11_cs_func>;

	spitouch: touchscreen@0 {
		status = "ok";
		compatible = "sec,sec_ts";

		spi-max-frequency = <16000000>;
		spi-cpol;
		spi-cpha;

		reg = <0>;
		pinctrl-names = "default";
		pinctrl-0 = <&sec_ts_irq &sec_ts_reset &sec_ts_switch>;

		sec,irq_gpio = <&gpa9 0 0>;
		sec,switch_gpio = <&gpp26 1 0>;	// Low: AP, High: AOC
		sec,reset_gpio = <&gpp26 0 0>;
		sec,firmware_name = "s6sy79x.bin";
		sec,mis_cal_check = <1>;
		sec,heatmap_mode = <1>;

		sec,max_coords = <1080 2340>;

		vdd-supply = <&m_ldo25_reg>; /* VIO 1.8V */
		avdd-supply = <&m_ldo26_reg>; /* AVDD 3.3V */

		controller-data {
			samsung,spi-feedback-delay = <0>;
			samsung,spi-chip-select-mode = <1>;
		};
	};
};