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arm64: dts: qcom: msm8916-samsung-serranove: Add touch key

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Add the CORERIVER TC360 touch key together with the two necessary
fixed regulators for it.

Note that for some reason Samsung decided to connect this to GPIOs
where no hardware I2C bus is available, so we need to fall back
to software bit-banging using i2c-gpio.

Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211004201921.18526-4-stephan@gerhold.net
This commit is contained in:
Stephan Gerhold 2021-10-04 22:19:09 +02:00 committed by Bjorn Andersson
parent c6b4ddc08d
commit 3fb7605735
1 changed files with 87 additions and 0 deletions
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87
arch/arm64/boot/dts/qcom/msm8916-samsung-serranove.dts
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@ -91,6 +91,32 @@
pinctrl-0 = <&tsp_en_default>;
};
reg_touch_key: regulator-touch-key {
compatible = "regulator-fixed";
regulator-name = "touch_key";
regulator-min-microvolt = <2800000>;
regulator-max-microvolt = <2800000>;
gpio = <&msmgpio 86 GPIO_ACTIVE_HIGH>;
enable-active-high;
pinctrl-names = "default";
pinctrl-0 = <&tkey_en_default>;
};
reg_key_led: regulator-key-led {
compatible = "regulator-fixed";
regulator-name = "key_led";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
gpio = <&msmgpio 60 GPIO_ACTIVE_HIGH>;
enable-active-high;
pinctrl-names = "default";
pinctrl-0 = <&tkey_led_en_default>;
};
i2c-muic {
compatible = "i2c-gpio";
sda-gpios = <&msmgpio 105 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
@ -113,6 +139,35 @@
pinctrl-0 = <&muic_irq_default>;
};
};
i2c-tkey {
compatible = "i2c-gpio";
sda-gpios = <&msmgpio 16 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
scl-gpios = <&msmgpio 17 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
pinctrl-names = "default";
pinctrl-0 = <&tkey_i2c_default>;
#address-cells = <1>;
#size-cells = <0>;
touchkey@20 {
compatible = "coreriver,tc360-touchkey";
reg = <0x20>;
interrupt-parent = <&msmgpio>;
interrupts = <98 IRQ_TYPE_EDGE_FALLING>;
vcc-supply = <&reg_touch_key>;
vdd-supply = <&reg_key_led>;
vddio-supply = <&pm8916_l6>;
linux,keycodes = <KEY_APPSELECT KEY_BACK>;
pinctrl-names = "default";
pinctrl-0 = <&tkey_default>;
};
};
};
&blsp_i2c5 {
@ -333,6 +388,38 @@
bias-disable;
};
tkey_default: tkey-default {
pins = "gpio98";
function = "gpio";
drive-strength = <2>;
bias-disable;
};
tkey_en_default: tkey-en-default {
pins = "gpio86";
function = "gpio";
drive-strength = <2>;
bias-disable;
};
tkey_i2c_default: tkey-i2c-default {
pins = "gpio16", "gpio17";
function = "gpio";
drive-strength = <2>;
bias-disable;
};
tkey_led_en_default: tkey-led-en-default {
pins = "gpio60";
function = "gpio";
drive-strength = <2>;
bias-disable;
};
tsp_en_default: tsp-en-default {
pins = "gpio73";
function = "gpio";