using cdns3-imx driver on imx8qm

[Oliver Graute <oliver.graute@gmail.com>]

Hello,

What is the right way for using the new cdns3-imx glue usb driver on a
imx8qm soc with linux-next. I added this snippet in imx8qm.dtsi and
enabled the driver in the kernel configuration.

usbotg3: usb3@5b110000 {
		compatible = "cdns,usb3";
		reg = <0x0 0x5B110000 0x0 0x10000>,
			<0x0 0x5B130000 0x0 0x10000>,
			<0x0 0x5B140000 0x0 0x10000>,
			<0x0 0x5B160000 0x0 0x40000>,
			<0x0 0x5B120000 0x0 0x10000>;
		interrupt-parent = <&gic>;
		interrupts = <GIC_SPI 271 IRQ_TYPE_LEVEL_HIGH>;
		clocks = <&usb3_lpcg 1>,
			 <&usb3_lpcg 0>,
			 <&usb3_lpcg 5>,
			 <&usb3_lpcg 2>,
			 <&usb3_lpcg 3>;
		clock-names = "usb3_lpm_clk", "usb3_bus_clk", "usb3_aclk",
			"usb3_ipg_clk", "usb3_core_pclk";
		assigned-clocks = <&clk IMX_SC_R_USB_2 IMX_SC_PM_CLK_PER>,
				  <&clk IMX_SC_R_USB_2 IMX_SC_PM_CLK_MISC>,
				  <&clk IMX_SC_R_USB_2 IMX_SC_PM_CLK_MST_BUS>;
		assigned-clock-rates = <125000000>, <12000000>, <250000000>;
		power-domains = <&pd IMX_SC_R_USB_2>;
		cdns3,usbphy = <&usb3phynop1>;
		status = "disabled";
	};

In board dts I enabled this:

&usbotg3 {
	dr_mode = "host";
	status = "okay";
};


On probing I got:

[    2.932089] cdns-usb3 5b110000.usb3: missing host IRQ

I also tried to enable "fsl,imx8qm-usb3" compatible buts this results
directly into a crash.

What do I miss here? some comments would be helpful.

Best Regards,

Oliver