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

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Google Slider Board device tree source
 *
 * Copyright 2020 Google, LLC.
 */

/* 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_R2_L = D11 = XEINT_20 = GPA9[0] = <&gpa9 0 0>
 *
 * DVDD = PP1800_L25M_TSP_DVDD = F10 = VLDO25M
 * AVDD = PP3300_L26M_TS_AVDD  = E13 = VLDO26M
 */

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

/ {
	fragment@touch_bus_negotiator {
		target-path = "/";
		__overlay__ {
			tbn: tbn {
				compatible = "touch_bus_negotiator";
				/* Low: AP, High: AOC */
				/* Note: The following GPIO flags are not used by the driver. */
				tbn,aoc2ap_gpio = <&gpa8 6 GPIO_ACTIVE_LOW>;
				tbn,ap2aoc_gpio = <&gpp26 1 GPIO_ACTIVE_LOW>;
			};
		};
	};
};

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

	aoc2ap_irq: aoc2ap-irq {
		samsung,pins = "gpa8-6";
		samsung,pin-pud = <EXYNOS_PIN_PULL_DOWN>;
		samsung,pin-drv = <GS101_PIN_DRV_2_5_MA>;
	};
};

&pinctrl_5 {
	ts_reset: ts-reset {
		samsung,pins = "gpp26-0";
		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
		samsung,pin-con-pdn = <EXYNOS_PIN_PDN_PREV>;
		samsung,pin-pud-pdn = <EXYNOS_PIN_PULL_NONE>;
	};

	ap2aoc: ap2aoc {
		samsung,pins = "gpp26-1";
		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
		samsung,pin-con-pdn = <EXYNOS_PIN_PDN_PREV>;
		samsung,pin-pud-pdn = <EXYNOS_PIN_PULL_NONE>;
	};

	ts_spi_bus_active: ts_spi_bus_active {
		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_2_5_MA>;
	};

	ts_spi_cs_active: ts_spi_cs_active {
		samsung,pins = "gpp23-3";
		samsung,pin-function = <EXYNOS_PIN_FUNC_2>;
		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
		samsung,pin-drv = <GS101_PIN_DRV_2_5_MA>;
	};

	ts_spi_bus_sleep: ts_spi_bus_sleep {
		samsung,pins = "gpp23-0", "gpp23-1";
		samsung,pin-function = <EXYNOS_PIN_FUNC_INPUT>;
		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
		samsung,pin-drv = <GS101_PIN_DRV_2_5_MA>;
		samsung,pin-con-pdn = <EXYNOS_PIN_PDN_INPUT>;
		samsung,pin-pud-pdn = <EXYNOS_PIN_PULL_NONE>;
	};

	ts_spi_miso_sleep: ts_spi_miso_sleep {
		samsung,pins = "gpp23-2";
		samsung,pin-function = <EXYNOS_PIN_FUNC_INPUT>;
		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
		samsung,pin-drv = <GS101_PIN_DRV_2_5_MA>;
		samsung,pin-con-pdn = <EXYNOS_PIN_PDN_INPUT>;
		samsung,pin-pud-pdn = <EXYNOS_PIN_PULL_NONE>;
	};

	ts_spi_cs_sleep: ts_spi_cs_sleep {
		samsung,pins = "gpp23-3";
		samsung,pin-function = <EXYNOS_PIN_FUNC_INPUT>;
		samsung,pin-pud = <EXYNOS_PIN_PULL_UP>;
		samsung,pin-drv = <GS101_PIN_DRV_2_5_MA>;
		samsung,pin-con-pdn = <EXYNOS_PIN_PDN_INPUT>;
		samsung,pin-pud-pdn = <EXYNOS_PIN_PULL_UP>;
	};
};

&spi_11 {
	#address-cells = <1>;
	#size-cells = <0>;
	status = "okay";
	pinctrl-0 = <>;
	cs-gpios = <&gpp23 3 GPIO_ACTIVE_LOW>;
	num-cs = <1>;

	spitouch: touchscreen@0 {
		status = "disabled";
		reg = <0>;
		pinctrl-names = "ts_active", "ts_suspend";
		pinctrl-0 = <&ts_irq &ts_reset &ap2aoc &aoc2ap_irq
			     &ts_spi_bus_active &ts_spi_cs_active>;
		pinctrl-1 = <&ts_spi_bus_sleep &ts_spi_miso_sleep &ts_spi_cs_sleep>;

		vdd-supply = <&m_ldo25_reg>;
		avdd-supply = <&m_ldo26_reg>;
	};
};