From: Iskren Chernev <iskren.chernev@gmail.com>
Date: Sun, 20 Sep 2020 14:48:54 +0000 (+0300)
Subject: ARM: dts: qcom: msm8974-klte: Add support for touchkey
X-Git-Tag: v5.11-rc1~91^2~29^2~9
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=a193dc521c97c07098bf0b6345966561a1f0ab9f;p=linux-block.git

ARM: dts: qcom: msm8974-klte: Add support for touchkey

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@gmail.com>
Link: https://lore.kernel.org/r/20200920144859.813032-3-iskren.chernev@gmail.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---

diff --git a/arch/arm/boot/dts/qcom-msm8974-samsung-klte.dts b/arch/arm/boot/dts/qcom-msm8974-samsung-klte.dts
index 9520c6e7910c..750e2f261139 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_l19: l19 {
-						regulator-min-microvolt = <2900000>;
+						regulator-min-microvolt = <3300000>;
 						regulator-max-microvolt = <3300000>;
 					};
 
@@ -203,6 +203,31 @@
 		};
 	};
 
+	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 @@
 				bias-disable;
 			};
 		};
+
+		i2c_touchkey_pins: i2c-touchkey {
+			mux {
+				pins = "gpio95", "gpio96";
+				function = "gpio";
+				input-enable;
+				bias-pull-up;
+			};
+		};
 	};
 
 	sdhci@f9824900 {
@@ -418,6 +452,14 @@
 				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>;
+			};
 		};
 	};
 };