linux-kernel - [PATCH RFC 3/3] ARM: dts: ti/omap: epson-bt2ws: add touchpad

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Message-Id: <20250825-ektp-submit-v1-3-1dd476c1277b@kemnade.info>
Date: Mon, 25 Aug 2025 00:07:30 +0200
From: Andreas Kemnade <andreas@...nade.info>
To: Dmitry Torokhov <dmitry.torokhov@...il.com>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Henrik Rydberg <rydberg@...math.org>, 
 Tony Lindgren <tony@...mide.com>, hns@...delico.com
Cc: linux-input@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org, 
 Andreas Kemnade <andreas@...nade.info>
Subject: [PATCH RFC 3/3] ARM: dts: ti/omap: epson-bt2ws: add touchpad

Add the EKTP1059 based touchpad connected via SPI.

Signed-off-by: Andreas Kemnade <andreas@...nade.info>
---
 arch/arm/boot/dts/ti/omap/omap4-epson-embt2ws.dts | 32 +++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/arch/arm/boot/dts/ti/omap/omap4-epson-embt2ws.dts b/arch/arm/boot/dts/ti/omap/omap4-epson-embt2ws.dts
index c90f43cc2fae..746ac4761b0d 100644
--- a/arch/arm/boot/dts/ti/omap/omap4-epson-embt2ws.dts
+++ b/arch/arm/boot/dts/ti/omap/omap4-epson-embt2ws.dts
@@ -429,6 +429,23 @@ MATRIX_KEY(1, 1, KEY_VOLUMEDOWN)
 	linux,input-no-autorepeat;
 };
 
+&mcspi1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&mcspi1_pins>;
+
+	touchpad@0 {
+		compatible = "elan,ektp1059";
+		reg = <0>;      /* cs0 */
+		pinctrl-names = "default";
+		pinctrl-0 = <&elan_pins>;
+		interrupt-parent = <&gpio2>;
+		interrupts = <20 IRQ_TYPE_LEVEL_LOW>;
+		spi-max-frequency = <200000>;
+		spi-cpol;
+		spi-cpha;
+	};
+};
+
 &mcbsp2 {
 	#sound-dai-cells = <0>;
 	pinctrl-names = "default";
@@ -506,6 +523,12 @@ OMAP4_IOPAD(0x1d4, PIN_OUTPUT | MUX_MODE3) /* gpio191 */
 		>;
 	};
 
+	elan_pins: pinmux-elan-pins {
+		pinctrl-single,pins = <
+			OMAP4_IOPAD(0x78, PIN_INPUT | MUX_MODE3) /* gpio52 */
+		>;
+	};
+
 	gpio_keys_pins: pinmux-gpio-key-pins {
 		pinctrl-single,pins = <
 			OMAP4_IOPAD(0x56, PIN_INPUT_PULLUP | MUX_MODE3) /* gpio35 */
@@ -579,6 +602,15 @@ OMAP4_IOPAD(0x1ce, PIN_OUTPUT | MUX_MODE3) /* gpio27 */
 		>;
 	};
 
+	mcspi1_pins: pinmux-mcspi1-pins {
+		pinctrl-single,pins = <
+			OMAP4_IOPAD(0x132, PIN_INPUT_PULLUP | MUX_MODE0)
+			OMAP4_IOPAD(0x134, PIN_INPUT_PULLUP | MUX_MODE0)
+			OMAP4_IOPAD(0x136, PIN_OUTPUT | MUX_MODE0)
+			OMAP4_IOPAD(0x138, PIN_OUTPUT | MUX_MODE0)
+		>;
+	};
+
 	mcbsp2_pins: pinmux-mcbsp2-pins {
 		pinctrl-single,pins = <
 			OMAP4_IOPAD(0x0f6, PIN_INPUT | MUX_MODE0)       /* abe_mcbsp2_clkx */

-- 
2.39.5