Linux/PCA9534A: How to include PCA9534A and its connections in Device Tree

Tool/software: Linux

Hello everyone,

I'm working on creating a device tree for a device centered around an AM3352 SoC. I'm using the am335x-evm.dts as my starting point and reference tree.

The schematics for my board show a PCA9534A connected to I2C2, and I'm trying to figure how to show this in the DT.

I've searched the Linux source documentation only to find gpio-pca953x.txt, which I did not find very helpful.

I also found the pca9534a page, but also found no helpful information when it came to the device tree. So I have some questions:

Question 1 - How should I include this device in the device tree? Something like what I have below?

&i2c2{
	gpio@20 {
		compatible = "nxp,pca9534";
		reg = <0x20>;
		pinctrl-names = "default";
		pinctrl-0 = <&pinctrl_pca934>;
		interrupt-parent = <&gpio3>;
		interrupts = <23 IRQ_TYPE_LEVEL_LOW>;
	};
}

Question 2 - If I do have to include it in the i2c2 node, do I have to include any of the properties outlined in i2c-gpio.txt?

Question 3 - How do I include the I/O from the PCA9534 in my DT?

Thank you for the help!

-Jon