How to add an Activity LED?

[dumtux]

Raspberry Pi and some other SBCs have an activity indicating LED aside from a power indicating LED.
It is somewhat similar to the HDD light of computers.
Does H616 have a dedicated pin for the activity indicator?

[YuzukiTsuru]

no, you need config it in software by writing a driver

[dumtux]

I could add Ethernet Activity / Link LEDs using the device tree.

	leds {
		compatible = "gpio-leds";

		system_led: system {
			gpios = <&gpio1 0 GPIO_ACTIVE_LOW>;
		};
		eth0_led0: link {
			label = chameleon:green:link";
			gpios = <&gpio 18 GPIO_ACTIVE_LOW>;
			default-state = "off";
		};
		eth0_led1: data {
			label = "chameleon:orange:data";
			gpios = <&gpio 19 GPIO_ACTIVE_LOW>;
			default-state = "off";
		};
	};