linux-kernel - [PATCH 1/2] ARM: dts: qcom: msm8974-hammerhead: add touchscreen support

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Message-Id: <20190603010455.17060-1-masneyb@onstation.org>
Date:   Sun,  2 Jun 2019 21:04:54 -0400
From:   Brian Masney <masneyb@...tation.org>
To:     agross@...nel.org
Cc:     bjorn.andersson@...aro.org, david.brown@...aro.org,
        robh+dt@...nel.org, mark.rutland@....com, linux@...linux.org.uk,
        linus.walleij@...aro.org, frank.rowand@...y.com,
        miquel.raynal@...tlin.com, absahu@...eaurora.org,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Jonathan Marek <jonathan@...ek.ca>
Subject: [PATCH 1/2] ARM: dts: qcom: msm8974-hammerhead: add touchscreen support

From: Jonathan Marek <jonathan@...ek.ca>

Add support for the Synaptics RMI4 touchscreen that is found on the
Nexus 5.

Signed-off-by: Jonathan Marek <jonathan@...ek.ca>
Signed-off-by: Brian Masney <masneyb@...tation.org>
---
This is to be applied on top of the display patch series:
https://lore.kernel.org/lkml/20190531094619.31704-1-masneyb@onstation.org/

 .../qcom-msm8974-lge-nexus5-hammerhead.dts    | 64 +++++++++++++++++++
 1 file changed, 64 insertions(+)

diff --git a/arch/arm/boot/dts/qcom-msm8974-lge-nexus5-hammerhead.dts b/arch/arm/boot/dts/qcom-msm8974-lge-nexus5-hammerhead.dts
index c92ea01e3918..06c33bd71620 100644
--- a/arch/arm/boot/dts/qcom-msm8974-lge-nexus5-hammerhead.dts
+++ b/arch/arm/boot/dts/qcom-msm8974-lge-nexus5-hammerhead.dts
@@ -280,6 +280,16 @@
 			};
 		};
 
+		i2c2_pins: i2c2 {
+			mux {
+				pins = "gpio6", "gpio7";
+				function = "blsp_i2c2";
+
+				drive-strength = <2>;
+				bias-disable;
+			};
+		};
+
 		i2c3_pins: i2c3 {
 			mux {
 				pins = "gpio10", "gpio11";
@@ -326,6 +336,25 @@
 				bias-disable;
 			};
 		};
+
+		touch_pin: touch {
+			int {
+				pins = "gpio5";
+				function = "gpio";
+
+				drive-strength = <2>;
+				bias-disable;
+				input-enable;
+			};
+
+			reset {
+				pins = "gpio8";
+				function = "gpio";
+
+				drive-strength = <2>;
+				bias-pull-up;
+			};
+		};
 	};
 
 	sdhci@...24900 {
@@ -468,6 +497,41 @@
 		};
 	};
 
+	i2c@...24000 {
+		status = "ok";
+
+		clock-frequency = <355000>;
+		qcom,src-freq = <50000000>;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&i2c2_pins>;
+
+		synaptics@70 {
+			compatible = "syna,rmi4-i2c";
+			reg = <0x70>;
+
+			interrupts-extended = <&msmgpio 5 IRQ_TYPE_EDGE_FALLING>;
+			vdd-supply = <&pm8941_l22>;
+			vio-supply = <&pm8941_lvs3>;
+
+			pinctrl-names = "default";
+			pinctrl-0 = <&touch_pin>;
+
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			rmi4-f01@1 {
+				reg = <0x1>;
+				syna,nosleep-mode = <1>;
+			};
+
+			rmi4-f12@12 {
+				reg = <0x12>;
+				syna,sensor-type = <1>;
+			};
+		};
+	};
+
 	i2c@...25000 {
 		status = "ok";
 		pinctrl-names = "default";
-- 
2.20.1