@@ -68,6 +68,63 @@ button-home {
linux,code = <KEY_HOMEPAGE>;
};
};
+
+ i2c-tkey {
+ compatible = "i2c-gpio";
+ sda-gpios = <&tlmm 16 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
+ scl-gpios = <&tlmm 17 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
+
+ pinctrl-0 = <&tkey_i2c_default>;
+ pinctrl-names = "default";
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ touchkey@20 {
+ /* Note: Actually an ABOV MCU that implements same interface */
+ compatible = "coreriver,tc360-touchkey";
+ reg = <0x20>;
+
+ interrupt-parent = <&tlmm>;
+ interrupts = <20 IRQ_TYPE_EDGE_FALLING>;
+
+ vcc-supply = <®_touch_key>;
+ vdd-supply = <®_keyled>;
+ vddio-supply = <&pm8916_l6>;
+
+ linux,keycodes = <KEY_APPSELECT KEY_BACK>;
+
+ pinctrl-0 = <&tkey_default>;
+ pinctrl-names = "default";
+ };
+ };
+
+ reg_keyled: regulator-keyled {
+ compatible = "regulator-fixed";
+ regulator-name = "keyled";
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+
+ /* NOTE: On some variants e.g. SM-A700FD it's GPIO 91 */
+ gpio = <&tlmm 100 GPIO_ACTIVE_HIGH>;
+ enable-active-high;
+
+ pinctrl-0 = <&tkey_led_en_default>;
+ pinctrl-names = "default";
+ };
+
+ reg_touch_key: regulator-touch-key {
+ compatible = "regulator-fixed";
+ regulator-name = "touch_key";
+ regulator-min-microvolt = <2800000>;
+ regulator-max-microvolt = <2800000>;
+
+ gpio = <&tlmm 56 GPIO_ACTIVE_HIGH>;
+ enable-active-high;
+
+ pinctrl-0 = <&tkey_en_default>;
+ pinctrl-names = "default";
+ };
};
&blsp_i2c1 {
@@ -160,4 +217,32 @@ sdc2_cd_default: sdc2-cd-default-state {
drive-strength = <2>;
bias-pull-up;
};
+
+ tkey_default: tkey-default-state {
+ pins = "gpio20";
+ function = "gpio";
+ drive-strength = <2>;
+ bias-disable;
+ };
+
+ tkey_en_default: tkey-en-default-state {
+ pins = "gpio56";
+ function = "gpio";
+ drive-strength = <2>;
+ bias-disable;
+ };
+
+ tkey_i2c_default: tkey-i2c-default-state {
+ pins = "gpio16", "gpio17";
+ function = "gpio";
+ drive-strength = <2>;
+ bias-disable;
+ };
+
+ tkey_led_en_default: tkey-led-en-default-state {
+ pins = "gpio100";
+ function = "gpio";
+ drive-strength = <2>;
+ bias-disable;
+ };
};
Add the CORERIVER TC360 touch key together with the necessary fixed regulator 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: Lin, Meng-Bo <linmengbo0689@protonmail.com> --- .../boot/dts/qcom/msm8939-samsung-a7.dts | 85 +++++++++++++++++++ 1 file changed, 85 insertions(+)