RockPi-E enabling UART1 and OTG using custom DT overlays

[djjerdog 1]

I wanted to share 2 custom overlays I've created and tested for the RockPi E to enable UART1 and OTG via the GPIO.

 

Create file rockchip-uart1.dts

/dts-v1/;
/ {
	compatible = "rockchip,rk3328";
	fragment@0 {
		target-path = "/serial@ff120000";
		__overlay__ {
			pinctrl-0 = < 0x23 >;
			status = "okay";
		};
	};
};

 

Create file rockchip-otg.dts

/dts-v1/;
/ {
	compatible = "rockchip,rk3328";
	fragment@0 {
		target-path = "/usb@ff580000";
		__overlay__ {
			dr_mode = "otg";			
		};
	};
};

 

 

Install and enable overlays:
sudo armbian-add-overlay rockchip-uart1.dts
sudo armbian-add-overlay rockchip-otg.dts

[ChrisO 1]

Excellent! Thank you very much! A second serial port is what I was looking for and now it works.

Couldn't figure out how to use the OTG one, though. Which GPIO pins are involved?

 

Regards,

Chris