linux-kernel - [PATCH] arm64: dts: qcom: msm8916-samsung-j5-common: Add touchscreen

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Message-ID: <20230715214046.14902-1-linmengbo0689@protonmail.com>
Date:   Sat, 15 Jul 2023 21:41:01 +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] arm64: dts: qcom: msm8916-samsung-j5-common: Add touchscreen

J5 and J5X use an Imagis IST3038C touchscreen that is connected to
blsp_i2c5. Add it to the device tree.

MFD driver for SM5703 is unavailable at the moment, which is required
to power up the touchscreen on J5, so it's disabled on J5 for now.

Signed-off-by: Lin, Meng-Bo <linmengbo0689@...tonmail.com>
---
 .../dts/qcom/msm8916-samsung-j5-common.dtsi   | 29 +++++++++++++++++++
 .../boot/dts/qcom/msm8916-samsung-j5.dts      |  8 +++++
 .../boot/dts/qcom/msm8916-samsung-j5x.dts     | 26 +++++++++++++++++
 3 files changed, 63 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/msm8916-samsung-j5-common.dtsi b/arch/arm64/boot/dts/qcom/msm8916-samsung-j5-common.dtsi
index f4fd5d72b28b..cb0e4a7faf91 100644
--- a/arch/arm64/boot/dts/qcom/msm8916-samsung-j5-common.dtsi
+++ b/arch/arm64/boot/dts/qcom/msm8916-samsung-j5-common.dtsi
@@ -86,6 +86,26 @@ muic: extcon@25 {
 	};
 };
 
+&blsp_i2c5 {
+	status = "okay";
+
+	touchscreen: touchscreen@50 {
+		compatible = "imagis,ist3038c";
+		reg = <0x50>;
+
+		interrupt-parent = <&tlmm>;
+		interrupts = <13 IRQ_TYPE_EDGE_FALLING>;
+
+		touchscreen-size-x = <720>;
+		touchscreen-size-y = <1280>;
+
+		vddio-supply = <&pm8916_l6>;
+
+		pinctrl-0 = <&tsp_int_default>;
+		pinctrl-names = "default";
+	};
+};
+
 &blsp_uart2 {
 	status = "okay";
 };
@@ -162,6 +182,15 @@ muic_int_default: muic-int-default-state {
 	sdc2_cd_default: sdc2-cd-default-state {
 		pins = "gpio38";
 		function = "gpio";
+
+		drive-strength = <2>;
+		bias-disable;
+	};
+
+	tsp_int_default: tsp-int-default-state {
+		pins = "gpio13";
+		function = "gpio";
+
 		drive-strength = <2>;
 		bias-disable;
 	};
diff --git a/arch/arm64/boot/dts/qcom/msm8916-samsung-j5.dts b/arch/arm64/boot/dts/qcom/msm8916-samsung-j5.dts
index 0a32d33e9778..3e1ff5b4d2d7 100644
--- a/arch/arm64/boot/dts/qcom/msm8916-samsung-j5.dts
+++ b/arch/arm64/boot/dts/qcom/msm8916-samsung-j5.dts
@@ -10,6 +10,14 @@ / {
 	chassis-type = "handset";
 };
 
+&blsp_i2c5 {
+	status = "disabled";
+};
+
+&touchscreen {
+	/* FIXME: Missing sm5703-mfd driver to power up vdd-supply */
+};
+
 &usb_hs_phy {
 	qcom,init-seq = /bits/ 8 <0x1 0x19 0x2 0x0b>;
 };
diff --git a/arch/arm64/boot/dts/qcom/msm8916-samsung-j5x.dts b/arch/arm64/boot/dts/qcom/msm8916-samsung-j5x.dts
index 7e1326cc13c5..b2fe109723d8 100644
--- a/arch/arm64/boot/dts/qcom/msm8916-samsung-j5x.dts
+++ b/arch/arm64/boot/dts/qcom/msm8916-samsung-j5x.dts
@@ -8,12 +8,38 @@ / {
 	model = "Samsung Galaxy J5 (2016)";
 	compatible = "samsung,j5x", "qcom,msm8916";
 	chassis-type = "handset";
+
+	reg_vdd_tsp_a: regulator-vdd-tsp-a {
+		compatible = "regulator-fixed";
+		regulator-name = "vdd_tsp_a";
+		regulator-min-microvolt = <3000000>;
+		regulator-max-microvolt = <3000000>;
+
+		gpio = <&tlmm 108 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+
+		pinctrl-0 = <&tsp_ldo_en_default>;
+		pinctrl-names = "default";
+	};
 };
 
 &muic {
 	interrupts = <121 IRQ_TYPE_EDGE_FALLING>;
 };
 
+&touchscreen {
+	vdd-supply = <&reg_vdd_tsp_a>;
+};
+
+&tlmm {
+	tsp_ldo_en_default: tsp-ldo-en-default-state {
+		pins = "gpio108";
+		function = "gpio";
+		drive-strength = <2>;
+		bias-disable;
+	};
+};
+
 &muic_int_default {
 	pins = "gpio121";
 };
-- 
2.39.2