add dts config

hc

2023-12-06 08f87f769b595151be1afeff53e144f543faa614

 kernel/arch/arm/boot/dts/imx6qdl-rex.dtsi
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@@ -1,12 +1,8 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * Copyright 2014 FEDEVEL, Inc.
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  *
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  * Author: Robert Nelson <robertcnelson@gmail.com>
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License version 2 as
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- * published by the Free Software Foundation.
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- *
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  */
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 #include <dt-bindings/gpio/gpio.h>
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@@ -136,6 +132,19 @@
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 	pinctrl-0 = <&pinctrl_i2c2>;
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 	status = "okay";
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+	pca9535: gpio-expander@27 {
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+		compatible = "nxp,pca9535";
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+		reg = <0x27>;
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+		gpio-controller;
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+		#gpio-cells = <2>;
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+		pinctrl-names = "default";
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+		pinctrl-0 = <&pinctrl_pca9535>;
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+		interrupt-parent = <&gpio6>;
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+		interrupts = <16 IRQ_TYPE_LEVEL_LOW>;
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+		interrupt-controller;
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+		#interrupt-cells = <2>;
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+	};
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+
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 	eeprom@57 {
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 		compatible = "atmel,24c02";
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 		reg = <0x57>;
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@@ -241,6 +250,12 @@
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 			>;
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 		};
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+		pinctrl_pca9535: pca9535grp {
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+			fsl,pins = <
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+				MX6QDL_PAD_NANDF_CS3__GPIO6_IO16	0x17059
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+		   >;
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+		};
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+
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 		pinctrl_uart1: uart1grp {
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 			fsl,pins = <
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 				MX6QDL_PAD_CSI0_DAT10__UART1_TX_DATA	0x1b0b1