Add support for the touchkey found on the Samsung Galaxy S5. The
touchkey is responsible for handling the application and back buttons
found around the home button.
Signed-off-by: Iskren Chernev <iskren.chernev@xxxxxxxxx>
---
.../boot/dts/qcom-msm8974-samsung-klte.dts | 44 ++++++++++++++++++-
1 file changed, 43 insertions(+), 1 deletion(-)
diff --git a/arch/arm/boot/dts/qcom-msm8974-samsung-klte.dts b/arch/arm/boot/dts/qcom-msm8974-samsung-klte.dts
index 9520c6e7910ce..750e2f261139a 100644
--- a/arch/arm/boot/dts/qcom-msm8974-samsung-klte.dts
+++ b/arch/arm/boot/dts/qcom-msm8974-samsung-klte.dts
@@ -145,7 +145,7 @@ pma8084_l18: l18 {
};
pma8084_l19: l19 {
- regulator-min-microvolt = <2900000>;
+ regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
};
@@ -203,6 +203,31 @@ pma8084_l27: l27 {
};
};
+ i2c-gpio-touchkey {
+ compatible = "i2c-gpio";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ sda-gpios = <&msmgpio 95 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+ scl-gpios = <&msmgpio 96 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&i2c_touchkey_pins>;
+
+ touchkey@20 {
+ compatible = "cypress,tm2-touchkey";
+ reg = <0x20>;
+
+ interrupt-parent = <&pma8084_gpios>;
+ interrupts = <6 IRQ_TYPE_EDGE_FALLING>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&touchkey_pin>;
+
+ vcc-supply = <&max77826_ldo15>;
+ vdd-supply = <&pma8084_l19>;
+
+ linux,keycodes = <KEY_APPSELECT KEY_BACK>;
+ };
+ };
+
/delete-node/ vreg-boost;
};
@@ -268,6 +293,15 @@ mux {
bias-disable;
};
};
+
+ i2c_touchkey_pins: i2c-touchkey {
+ mux {
+ pins = "gpio95", "gpio96";
+ function = "gpio";
+ input-enable;
+ bias-pull-up;
+ };
+ };
};
sdhci@f9824900 {
@@ -418,6 +452,14 @@ gpio_keys_pin_a: gpio-keys-active {
bias-pull-up;
power-source = <PMA8084_GPIO_S4>;
};
+
+ touchkey_pin: touchkey-int-pin {
+ pins = "gpio6";
+ function = "normal";
+ bias-disable;
+ input-enable;
+ power-source = <PMA8084_GPIO_S4>;
+ };
};
};
};
--
2.27.0
