linux-kernel - [PATCH v2 6/6] arm64: dts: exynos: exynos8895-dreamlte: enable support for the touchscreen

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Message-ID: <20250104164321.333669-7-ivo.ivanov.ivanov1@gmail.com>
Date: Sat,  4 Jan 2025 18:43:21 +0200
From: Ivaylo Ivanov <ivo.ivanov.ivanov1@...il.com>
To: Ulf Hansson <ulf.hansson@...aro.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Alim Akhtar <alim.akhtar@...sung.com>,
	Jaehoon Chung <jh80.chung@...sung.com>
Cc: linux-mmc@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 6/6] arm64: dts: exynos: exynos8895-dreamlte: enable support for the touchscreen

The Samsung Galaxy S8 uses a Samsung s6sy761 touchscreen over hsi2c23.
Add a node for it in order to allow using the touchscreen as long as
the previous bootloader has enabled the required regulators because
there's no support for PMIC yet.

Signed-off-by: Ivaylo Ivanov <ivo.ivanov.ivanov1@...il.com>
---
 .../boot/dts/exynos/exynos8895-dreamlte.dts   | 40 +++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/arch/arm64/boot/dts/exynos/exynos8895-dreamlte.dts b/arch/arm64/boot/dts/exynos/exynos8895-dreamlte.dts
index 6c4f8d4a9..d9b51d884 100644
--- a/arch/arm64/boot/dts/exynos/exynos8895-dreamlte.dts
+++ b/arch/arm64/boot/dts/exynos/exynos8895-dreamlte.dts
@@ -10,6 +10,7 @@
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/input/input.h>
 #include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/soc/samsung,exynos-usi.h>
 
 / {
 	model = "Samsung Galaxy S8 (SM-G950F)";
@@ -93,6 +94,33 @@ wink-key {
 			wakeup-source;
 		};
 	};
+
+	/* TODO: Remove once PMIC is implemented  */
+	reg_placeholder: regulator-0 {
+		compatible = "regulator-fixed";
+		regulator-name = "reg-placeholder";
+	};
+};
+
+&hsi2c_23 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	status = "okay";
+
+	touchscreen@48 {
+		compatible = "samsung,s6sy761";
+		reg = <0x48>;
+
+		/* TODO: Update once PMIC is implemented */
+		avdd-supply = <&reg_placeholder>;
+		vdd-supply = <&reg_placeholder>;
+
+		interrupt-parent = <&gpa1>;
+		interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
+
+		pinctrl-0 = <&ts_int>;
+		pinctrl-names = "default";
+	};
 };
 
 &oscclk {
@@ -155,4 +183,16 @@ sd2_cd: sd2-cd-pins {
 		samsung,pin-pud = <EXYNOS_PIN_PULL_UP>;
 		samsung,pin-drv = <EXYNOS7_PIN_DRV_LV4>;
 	};
+
+	ts_int: ts-int-pins {
+		samsung,pins = "gpa1-0";
+		samsung,pin-function = <EXYNOS_PIN_FUNC_EINT>;
+		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
+		samsung,pin-drv = <EXYNOS7_PIN_DRV_LV1>;
+	};
+};
+
+&usi9 {
+	samsung,mode = <USI_V1_I2C0_1>;
+	status = "okay";
 };
-- 
2.43.0