board: frdm_imx93: enable pcal6408 gpio expander

Enable  pcal6408 gpio expander on FRDM-IMX93 board. This expander has
its reset pin controlled by another expander, and both expanders is
driven by the same pca_series driver. To guarentee correct init order,
pcal6408 is set to deferred init in a board init function.

Signed-off-by: Chekhov Ma <[email protected]>

Author: CkovMk

boards/nxp/frdm_imx93/Kconfig.defconfig

@@ -7,7 +7,7 @@ if BOARD_FRDM_IMX93_MIMX9352_A55
 
 if GPIO
 
-# CAN Phy must be initialized after board mux
+# I2C must be initialized for onboard expanders
 config I2C
 	default y
 

boards/nxp/frdm_imx93/frdm_imx93_mimx9352_a55.dts

@@ -88,11 +88,28 @@
 	status = "okay";
 };
 
-&lpi2c2 {
+&lpi2c1 {
+	clock-frequency = <I2C_BITRATE_FAST>;
+	pinctrl-0 = <&i2c1_default>;
+	pinctrl-names = "default";
 	status = "okay";
+
+	gpio_exp1: pcal6408@20 {
+		compatible = "nxp,pcal6408";
+		reg = <0x20>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		ngpios = <8>;
+		reset-gpios = <&gpio_exp0 20 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+		status = "okay";
+	};
+};
+
+&lpi2c2 {
 	clock-frequency = <I2C_BITRATE_FAST>;
 	pinctrl-0 = <&i2c2_default>;
 	pinctrl-names = "default";
+	status = "okay";
 
 	gpio_exp0: pcal6524@22 {
 		compatible = "nxp,pcal6524";