Commit 538e5f71 authored by Alistair Francis's avatar Alistair Francis Committed by Shawn Guo
Browse files

ARM: dts: imx7d-remarkable2: add wacom digitizer device 



Add Wacom I2C support for the reMarkable 2 eInk tablet using the
generic I2C HID framework.

Signed-off-by: default avatarAlistair Francis <alistair@alistair23.me>
Signed-off-by: default avatarShawn Guo <shawnguo@kernel.org>
parent eb197dfe

arch/arm/boot/dts/imx7d-remarkable2.dts

+59 −0
Original line number Diff line number Diff line
@@ -34,6 +34,19 @@ reg_brcm: regulator-brcm { 
		startup-delay-us = <150>;

	};



	reg_digitizer: regulator-digitizer {

		compatible = "regulator-fixed";

		regulator-name = "VDD_3V3_DIGITIZER";

		regulator-min-microvolt = <3300000>;

		regulator-max-microvolt = <3300000>;

		pinctrl-names = "default", "sleep";

		pinctrl-0 = <&pinctrl_digitizer_reg>;

		pinctrl-1 = <&pinctrl_digitizer_reg>;

		gpio = <&gpio1 6 GPIO_ACTIVE_HIGH>;

		enable-active-high;

		startup-delay-us = <100000>; /* 100 ms */

	};



	wifi_pwrseq: wifi_pwrseq {

		compatible = "mmc-pwrseq-simple";

		pinctrl-names = "default";
@@ -51,6 +64,26 @@ &clks { 
	assigned-clock-rates = <0>, <32768>;

};



&i2c1 {

	clock-frequency = <400000>;

	pinctrl-names = "default";

	pinctrl-0 = <&pinctrl_i2c1>;

	status = "okay";



	wacom_digitizer: digitizer@9 {

		compatible = "hid-over-i2c";

		reg = <0x09>;

		hid-descr-addr = <0x01>;

		pinctrl-names = "default";

		pinctrl-0 = <&pinctrl_wacom>;

		interrupt-parent = <&gpio1>;

		interrupts = <1 IRQ_TYPE_LEVEL_LOW>;

		touchscreen-inverted-x;

		touchscreen-inverted-y;

		vdd-supply = <&reg_digitizer>;

	};

};



&snvs_pwrkey {

	status = "okay";

};
@@ -117,6 +150,25 @@ &wdog1 { 
	fsl,ext-reset-output;

};



&iomuxc_lpsr {

	pinctrl_digitizer_reg: digitizerreggrp {

		fsl,pins = <

			/* DIGITIZER_PWR_EN */

			MX7D_PAD_LPSR_GPIO1_IO06__GPIO1_IO6	0x14

		>;

	};



	pinctrl_wacom: wacomgrp {

		fsl,pins = <

			/*MX7D_PAD_LPSR_GPIO1_IO05__GPIO1_IO5	0x00000014 FWE */

			MX7D_PAD_LPSR_GPIO1_IO04__GPIO1_IO4	0x00000074 /* PDCTB */

			MX7D_PAD_LPSR_GPIO1_IO01__GPIO1_IO1	0x00000034 /* WACOM INT */

			/*MX7D_PAD_LPSR_GPIO1_IO06__GPIO1_IO6	0x00000014 WACOM PWR ENABLE */

			/*MX7D_PAD_LPSR_GPIO1_IO00__GPIO1_IO0	0x00000074 WACOM RESET */

		>;

	};

};



&iomuxc {

	pinctrl_brcm_reg: brcmreggrp {

		fsl,pins = <
@@ -125,6 +177,13 @@ MX7D_PAD_SAI1_TX_BCLK__GPIO6_IO13 0x14 
		>;

	};



	pinctrl_i2c1: i2c1grp {

		fsl,pins = <

			MX7D_PAD_I2C1_SDA__I2C1_SDA		0x4000007f

			MX7D_PAD_I2C1_SCL__I2C1_SCL		0x4000007f

		>;

	};



	pinctrl_uart1: uart1grp {

		fsl,pins = <

			MX7D_PAD_UART1_TX_DATA__UART1_DCE_TX	0x79