linux-kernel - [PATCH 8/8] arm64: dts: qcom: msm8939-samsung-a7: Add touchscreen

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Date:   Thu, 22 Jun 2023 02:06:02 +0000
From:   "Lin, Meng-Bo" <linmengbo0689@...tonmail.com>
To:     linux-kernel@...r.kernel.org
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Stephan Gerhold <stephan@...hold.net>,
        Nikita Travkin <nikita@...n.ru>, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, ~postmarketos/upstreaming@...ts.sr.ht
Subject: [PATCH 8/8] arm64: dts: qcom: msm8939-samsung-a7: Add touchscreen

A7 uses a Cypress TrueTouch Generation 5 that is connected to blsp_i2c5.
Add it to the device tree.

Signed-off-by: Lin, Meng-Bo <linmengbo0689@...tonmail.com>
---
 .../boot/dts/qcom/msm8939-samsung-a7.dts      | 66 +++++++++++++++++++
 1 file changed, 66 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/msm8939-samsung-a7.dts b/arch/arm64/boot/dts/qcom/msm8939-samsung-a7.dts
index ea74b61782de..66e56ac59998 100644
--- a/arch/arm64/boot/dts/qcom/msm8939-samsung-a7.dts
+++ b/arch/arm64/boot/dts/qcom/msm8939-samsung-a7.dts
@@ -222,6 +222,33 @@ reg_touch_key: regulator-touch-key {
 		pinctrl-names = "default";
 	};
 
+	reg_tsp_vdd: regulator-tsp-vdd {
+		compatible = "regulator-fixed";
+		regulator-name = "tsp_vdd";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+		vin-supply = <&pm8916_s4>;
+
+		gpio = <&tlmm 8 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+
+		pinctrl-0 = <&reg_tsp_io_en_default>;
+		pinctrl-names = "default";
+	};
+
+	reg_vdd_tsp: regulator-vdd-tsp {
+		compatible = "regulator-fixed";
+		regulator-name = "vdd_tsp";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+
+		gpio = <&tlmm 73 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+
+		pinctrl-0 = <&reg_tsp_en_default>;
+		pinctrl-names = "default";
+	};
+
 	reg_vibrator: regulator-vibrator {
 		compatible = "regulator-fixed";
 		regulator-name = "motor_en";
@@ -260,6 +287,24 @@ muic: extcon@25 {
 	};
 };
 
+&blsp_i2c5 {
+	status = "okay";
+
+	touchscreen@24 {
+		compatible = "cypress,tt21000";
+
+		reg = <0x24>;
+		interrupt-parent = <&tlmm>;
+		interrupts = <13 IRQ_TYPE_EDGE_FALLING>;
+
+		vdd-supply = <&reg_vdd_tsp>;
+		vddio-supply = <&reg_tsp_vdd>;
+
+		pinctrl-0 = <&tsp_int_default>;
+		pinctrl-names = "default";
+	};
+};
+
 &blsp_uart2 {
 	status = "okay";
 };
@@ -385,6 +430,20 @@ nfc_i2c_default: nfc-i2c-default-state {
 		bias-disable;
 	};
 
+	reg_tsp_en_default: reg-tsp-en-default-state {
+		pins = "gpio73";
+		function = "gpio";
+		drive-strength = <2>;
+		bias-disable;
+	};
+
+	reg_tsp_io_en_default: reg-tsp-io-en-default-state {
+		pins = "gpio8";
+		function = "gpio";
+		drive-strength = <2>;
+		bias-disable;
+	};
+
 	sdc2_cd_default: sdc2-cd-default-state {
 		pins = "gpio38";
 		function = "gpio";
@@ -426,4 +485,11 @@ tkey_led_en_default: tkey-led-en-default-state {
 		drive-strength = <2>;
 		bias-disable;
 	};
+
+	tsp_int_default: tsp-int-default-state {
+		pins = "gpio13";
+		function = "gpio";
+		drive-strength = <2>;
+		bias-disable;
+	};
 };
-- 
2.39.2