From 02df9d2fb6bccfd25c1e2d2d47abe96200a04712 Mon Sep 17 00:00:00 2001
From: Tobias Kahlki <tobias.kahlki@seco.com>
Date: Mon, 9 Sep 2024 16:42:19 +0200
Subject: [PATCH] [D18][DTBO] Add overlay for I2C MXT touch controller
---
.../seco-imx8mp-d18-ts-mxt-overlay.dts | 53 +++++++++++++++++++
1 file changed, 53 insertions(+)
create mode 100644 arch/arm64/boot/dts/seco/overlays/seco-imx8mp-d18-ts-mxt-overlay.dts
diff --git a/arch/arm64/boot/dts/seco/overlays/seco-imx8mp-d18-ts-mxt-overlay.dts b/arch/arm64/boot/dts/seco/overlays/seco-imx8mp-d18-ts-mxt-overlay.dts
new file mode 100644
index 00000000000000..8c486516035c46
--- /dev/null
+++ b/arch/arm64/boot/dts/seco/overlays/seco-imx8mp-d18-ts-mxt-overlay.dts
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2024 SECO
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include "../include/imx8mp-pinfunc.h"
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+
+/dts-v1/;
+/plugin/;
+
+/ {
+ compatible = "fsl,imx8mp-evk", "seco,imx8mp-d18", "fsl,imx8mp";
+
+/* __________________________________________________________________________
+ * | |
+ * | I2C Touch Controller maXTouch |
+ * |__________________________________________________________________________|
+ */
+
+ fragment@0 {
+ target = <&i2c2>;
+ __overlay__ {
+ mxt@4a {
+ compatible = "atmel,maxtouch";
+ status = "okay";
+ reg = <0x4a>;
+ /*
+ * The touch_int is connected to the GPIO-Expander
+ * and needs no pinmuxing.
+ */
+ interrupt-parent = <&pca6416>;
+ interrupts = <4 IRQ_TYPE_LEVEL_LOW>;
+ /*
+ * The atmel-mxt driver doesn't support the irq-gpio
+ * or the irq-low-active properties.
+ */
+ reset-gpio = <&pca6416 2 GPIO_ACTIVE_LOW>;
+ reset-low-active = <1>;
+ };
+ };
+ };
+};
--
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