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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: Alistair Francis <alistair@alistair23.me>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Alistair Francis 2021-12-08 22:40:45 +10:00 committed by Shawn Guo
parent eb197dfe38
commit 538e5f7106
1 changed files with 59 additions and 0 deletions
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59
arch/arm/boot/dts/imx7d-remarkable2.dts
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@ -34,6 +34,19 @@
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 @@
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 @@
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 @@
>;
};
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