linux-kernel - [PATCH 4/4] arm64: dts: qcom: sm8450-nagara: Add Samsung touchscreen

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Date:   Thu, 10 Nov 2022 23:39:29 +0100
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     linux-arm-msm@...r.kernel.org, andersson@...nel.org,
        agross@...nel.org
Cc:     marijn.suijten@...ainline.org,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 4/4] arm64: dts: qcom: sm8450-nagara: Add Samsung touchscreen

Add device node and required pinctrl settings (as well as a fixup for
an existing one, whoops!) to support the Samsung Electronics
touchscreen on Nagara devices.

Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
---
 .../dts/qcom/sm8450-sony-xperia-nagara.dtsi   | 27 +++++++++++++++++--
 1 file changed, 25 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/sm8450-sony-xperia-nagara.dtsi b/arch/arm64/boot/dts/qcom/sm8450-sony-xperia-nagara.dtsi
index 0d8d1519a23b..38256226d229 100644
--- a/arch/arm64/boot/dts/qcom/sm8450-sony-xperia-nagara.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8450-sony-xperia-nagara.dtsi
@@ -435,7 +435,22 @@ &gpi_dma2 {
 	status = "okay";
 };
 
-/* I2C4 is used, it hosts a Samsung touchscreen, but GPI DMA is broken.. */
+&i2c4 {
+	clock-frequency = <400000>;
+	status = "okay";
+
+	touchscreen@48 {
+		compatible = "samsung,s6sy761";
+		reg = <0x48>;
+		interrupt-parent = <&tlmm>;
+		interrupts = <21 0x2008>;
+		vdd-supply = <&pm8350c_l2>;
+		avdd-supply = <&pm8350c_l3>;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&ts_reset_default &ts_int_default>;
+	};
+};
 
 &i2c5 {
 	clock-frequency = <400000>;
@@ -566,8 +581,16 @@ &spi10 {
 &tlmm {
 	gpio-reserved-ranges = <28 4>;
 
+	ts_reset_default: ts-reset-default-state {
+		pins = "gpio20";
+		function = "gpio";
+		drive-strength = <2>;
+		bias-disable;
+		output-high;
+	};
+
 	ts_int_default: ts-int-default-state {
-		pins = "gpio23";
+		pins = "gpio21";
 		function = "gpio";
 		drive-strength = <2>;
 		bias-disable;
-- 
2.38.1